Conditions: Esophageal Cancer Gastric Cancer Adenocarcinoma
Allocation: NA | Intervention model: SINGLE_GROUP
Enrollment: 14
Healthy volunteers: no

Brief summary:
Patients can be prescreened for the study at the time of diagnosis of locally advanced or metastatic disease by determining presence of LOH high status and/or deleterious alterations in HR pathway genes in the most recent available tumor tissue sample or in blood if they are found to have germline mutations. Patients with either somatic or germline mutations will be allowed. At the time of disease progression, patients with high LOH or deleterious alterations in HR pathway genes and satisfying all other inclusion criteria will be enrolled on the study. Patients will be treated with niraparib (flat dose) orally every day for 28 days until disease progression, unacceptable side effects, withdrawal of consent, or death. CT of the chest/abdomen/pelvis will be performed every 2 months and response will be assessed by RECIST 1.1.

Detailed description:

Arms:
arm 1: None

Interventions: intervention 1: Niraparib
Intervention descriptions: intervention 1: Niraparib will be administered as a flat-fixed daily dose depending on weight and platelet count. Subjects will take orally on a daily basis for 28 days. Each cycle = 28 days

Protocol document:
Prot_SAP_000.pdf: 
Clinical Study Protocol 
HCRN ESO17-325 
1 
Version Date: 01SEP2021 
Confidential 
A Phase II Study Evaluating Safety and Efficacy of Niraparib in Patients with Previously Treated 
Homologous Recombination (HR) Defective or Loss of Heterozygosity (LOH) high Metastatic 
Esophageal/Gastroesophageal Junction/Proximal Gastric Adenocarcinoma 
 
 
Sponsor Investigator 
Shadia Jalal, MD 
Indiana University Melvin and Bren Simon Cancer Center 
 
 
Statistician 
Susan Perkins, PhD 
 
 
Trial Management Provided by  
Hoosier Cancer Research Network, Inc. 
7676 Interactive Way Suite 120 
Indianapolis 46278 
 
 
Trial Supported by  
GlaxoSmithKline (“GSK”) 
 
 
Investigational New Drug (IND): IND EXEMPT PER FDA 10/10/18 
 
 
 
 
Initial Protocol Version Date: 03JAN2019 (LEAD SITE ONLY) 
Protocol Amendment Version Date:  
01MAR2019  
11FEB2020 
23JUN2020 
25AUG2020 
01SEP2021 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
2 
Version Date: 01SEP2021 
Confidential 
PROTOCOL SIGNATURE PAGE 
 
A Phase II Study Evaluating Safety and Efficacy of Niraparib in Patients with Previously Treated 
Homologous Recombination (HR) Defective or Loss of Heterozygosity (LOH) Metastatic 
Esophageal/Gastroesophageal Junction/Proximal Gastric Adenocarcinoma  
 
VERSION DATE:  01SEP2021 
 
I confirm I have read this protocol, I understand it, and I will work according to this protocol and 
to the ethical principles stated in the latest version of the Declaration of Helsinki, the applicable 
guidelines for good clinical practices, whichever provides the greater protection of the 
individual. I will accept the monitor’s overseeing of the study. I will promptly submit the 
protocol to applicable institutional review board(s). 
 
 
 
 
 PLEASE COMPLETE AND EMAIL A COPY TO HCRN 
 
 
 
 
____________________________________ 
________________________ 
Signature of Site Investigator  
 
 
  
Date 
 
 
____________________________________ 
Site Investigator Name (printed) 
 
 
____________________________________ 
Site Investigator Title 
 
 
Name of Facility 
 
 
Location of Facility (City and State) 
____________________________________
____________________________________


Clinical Study Protocol 
HCRN ESO17-325 
3 
Version Date: 01SEP2021 
Confidential 
SYNOPSIS 
TITLE 
A Phase II Study Evaluating Safety and Efficacy of Niraparib in Patients 
with Previously Treated Homologous Recombination (HR) Defective or 
Loss of Heterozygosity (LOH) high Metastatic Esophageal / 
Gastroesophageal Junction/ Proximal Gastric Adenocarcinoma
PHASE 
II 
OBJECTIVES 
Primary Objective: 
Determine objective response rate (ORR) with niraparib in patients with 
metastatic esophageal/gastroesophageal junction (GEJ)/proximal gastric 
adenocarcinoma previously treated with platinum containing 
chemotherapy and harboring high genome wide loss of heterozygosity 
(LOH) or defective homologous recombination noted through deleterious 
alterations in HR genes. Genes analyzed will include: BRCA1/2, PALB2, 
ATM, BARD1, BRIP1, CDK12, CHEK2, FANCA, RAD51, RAD51B, 
RAD51C, RAD51D, RAD54L, NBN, ARID1A and GEN1. Patients can 
have somatic and/ or germline mutations. Deleterious mutations in HR 
genes are defined as those that have been previously characterized to be 
loss-of-function/pathogenic/or likely pathogenic as specified per the 
following databases: Clinvar, OncoKB, or BRCAExchange. Mutations or 
small insertions or deletions that results in truncation, frameshift, stop 
codon loss, or stop codon gain will also be considered deleterious 
irrespective of their presence in the aforementioned databases unless 
previously characterized to be benign. Copy number losses or disruption 
by fusion will also be considered deleterious irrespective of their presence 
in the aforementioned databases. Gene amplifications or variants of 
unknown significance will not be eligible for inclusion.  Patients are 
eligible if they have a deleterious alteration in one of these pre-specified 
HR genes, including: BRCA1/2, PALB2, ATM, BARD1, BRIP1, 
CDK12, CHEK2, FANCA, RAD51, RAD51B, RAD51C, RAD51D, 
RAD54L, NBN, ARID1A and GEN1. 
 
Secondary Objectives: 
 Evaluate the safety and tolerability of niraparib as defined by CTCAE 
v5. 
 Determine progression free survival (PFS) with niraparib in above 
mentioned patient population. 
 Evaluate disease control rate (DCR) 
 
Exploratory Objectives: 
 Assess the correlation between high genome wide LOH in the tumor 
samples and response to treatment with niraparib.  
 Analyze mechanisms of resistance to PARP inhibitors. We will 
mainly analyze reversion mutations in HR genes as a potential 
mechanism of resistance.


Clinical Study Protocol 
HCRN ESO17-325 
4 
Version Date: 01SEP2021 
Confidential 
 Analyze EZH2 expression and its correlation with response and 
resistance to PARP inhibitors 
 Analyze germline mutations of HR genes from DNA collected from 
blood samples and correlation with response to niraparib. 
 Correlate CTCs with response to treatment. 
STUDY DESIGN 
Phase II: Single arm, Simon two stage design  
 
Estimated sample size: 43 patients  
In stage I, 18 patients will be treated, and if 2 or fewer responses are 
observed, the trial will be stopped early for futility. If the trial goes on to 
stage II, an additional 25 patients will be enrolled. If the total number 
responding is 7 or less by the end of stage II, the drug will not be 
considered worthy of further study in this patient population. 
 
Primary Endpoint:  
 Best overall response rate, assessed by RECIST 1.1 criteria  
 
Secondary Endpoints:  
 All treatment related toxicity using CTCAE v5  
 Progression free survival (PFS), defined as time D1 of treatment to 
disease progression by RECIST 1.1 or death from any cause, 
whichever occurs first  
 Disease control rate as defined as stable disease (SD) for 8 weeks, or 
partial response (PR), or complete response (CR) by RECIST 1.1 
  
Brief Description:  
Patients can be prescreened for the study at the time of diagnosis of 
locally advanced or metastatic disease by determining presence of LOH 
high status and/or deleterious alterations in HR pathway genes in the most 
recent available tumor tissue or blood sample or in blood if they are found 
to have germline mutations. Patients with either somatic or germline 
mutations will be allowed. At the time of disease progression, patients 
with high LOH or deleterious alterations in HR pathway genes and 
satisfying all other inclusion criteria will be enrolled on the study. Patients 
will be treated with niraparib (flat dose) orally every day for 28 days until 
disease progression, unacceptable side effects, withdrawal of consent, or 
death. CT of the chest/abdomen/pelvis will be performed every 2 months 
and response will be assessed by RECIST 1.1. 
KEY ELIGIBILITY 
CRITERIA (See 
Section 3 for complete 
eligibility criteria) 
Inclusion Criteria:  
1. Locally advanced esophageal adenocarcinoma or proximal gastric 
adenocarcinoma or metastatic adenocarcinoma originating from 
esophagus, GE junction, or proximal stomach who progress/recur 
beyond 2 months of receiving a platinum- containing regimen. 
NOTE: Patients can be pre-screened for study at any time including 
after surgical resection for locally advanced esophageal cancer, at 


Clinical Study Protocol 
HCRN ESO17-325 
5 
Version Date: 01SEP2021 
Confidential 
presentation with metastatic disease and potentially during 
chemotherapy and radiation prior to surgery. 
2. Patient should not have received more than 2 prior lines of 
chemotherapy in the metastatic setting but could have received 
immunotherapy, VEGF2 directed therapy, and/or trastuzumab. 
3. One of the following genetic results is required for eligibility: 
 High LOH in tissue OR  
 HR mutation in tissue. OR  
 HR mutation in liquid biopsy OR 
 Germline mutation (blood)  
NOTE: Mutations, deletions or loss by fusions are the acceptable 
alterations in HR genes as long as they are deleterious.  Patients are 
eligible if they have a mutation in pre-specified HR genes BRCA1/2, 
PALB2, ATM, BARD1, BRIP1, CDK12, CHEK2, FANCA, RAD51, 
RAD51B, RAD51C, RAD51D, RAD54L, NBN, ARID1A and GEN1. 
Deleterious mutations in HR genes are defined as those that have been 
previously characterized to be loss-of-function/pathogenic/or likely 
pathogenic as specified per the following databases: Clinvar, OncoKB, or 
BRCAExchange. Mutations or small insertions or deletions that results in 
truncation, frameshift, stop codon loss, or stop codon gain will also be 
considered deleterious irrespective of their presence in the aforementioned 
databases unless previously characterized to be benign. Copy number 
losses or disruption by fusion will also be considered deleterious 
irrespective of their presence in the aforementioned databases. Gene 
amplifications or variants of unknown significance will not be eligible for 
inclusion. NOTE: Genetic testing results from a CLIA certified lab that 
confirm one of the following: high LOH in tissue, HR mutation in tissue 
or liquid biopsy or germline mutation in blood are required and can be 
used to meet eligibility. Even if a subject has met eligibility with one of 
the criteria above, results from the other analysis is required if available. 
If prior genetic results are not available, a subject must have archival 
tissue or fresh tissue (by new biopsy) for eligibility testing. Both primary 
tumor tissue and metastatic site sample biopsies are allowed. Blood will 
also be required for germline mutation analyses. If a subject has met 
eligibility with prior genetic results but does not have sufficient archival 
tissue for central confirmation, a biopsy is not required. 
4. ECOG PS 0-1 and adequate renal, hepatic, bone marrow function as 
detailed in the protocol 
 
Exclusion Criteria:  
1. Prior therapy with a PARP inhibitor 
2. Disease progression during first 2 months of standard dose platinum-
based chemotherapy (platinum refractory). This excludes low dose 
platinum based therapy that is given in a chemotherapy-radiation 
regimen for locally advanced esophageal cancer.


Clinical Study Protocol 
HCRN ESO17-325 
6 
Version Date: 01SEP2021 
Confidential 
STATISTICAL 
CONSIDERATIONS 
Null Hypothesis: ORR with niraparib in patients with metastatic 
esophageal/GEJ/proximal gastric adenocarcinoma previously treated with 
at least one line of platinum-based chemotherapy is 10% or less (based on 
historical response rate with single agent 2nd line chemotherapy in this 
disease).  
 
Alternative Hypothesis: ORR with niraparib in patients with metastatic 
esophageal/GEJ/proximal gastric adenocarcinoma previously treated with 
at least one line of platinum-based chemotherapy is 25% or greater.  
 
Acceptable Type I and type II errors:  
Acceptable Type I (alpha) error: up to 5%  
Acceptable Type II (beta) error: up to 20% (Power 80%)  
Estimated sample size: 43 patients using single arm, Simon two stage 
design  
 
In stage I, 18 patients will be treated, and if 2 or fewer responses are 
observed, the trial will be stopped early for futility. If the trial goes on to 
stage II, an additional 25 patients will be enrolled. If the total number 
responding is 7 or less by the end of stage II, the drug will not be 
considered worthy of further study in this patient population. 
 
Analytic plan for primary objective:  
Best overall response and ORR will be summarized descriptively. ORR is 
the proportion of patients with a best overall response of CR and PR (at 
any time up to and including the defined analysis cut-off point) and will 
be summarized with the point estimate and corresponding exact 95% 
confidence interval. An exact binomial test will be used to test the null vs 
alternative hypothesis 
 
Analytic plan for secondary objectives:  
 We will use descriptive statistics to summarize adverse events 
(AEs)/serious adverse events (SAEs), laboratory data, and vital signs 
that will be collected for all patients.  
 PFS will be estimated using Kaplan-Meier method and median PFS 
and 95% confidence interval estimated. 
 Disease control rate will be analyzed similarly to the primary 
endpoint  
TOTAL  
NUMBER OF 
SUBJECTS 
N = 43 
ESTIMATED 
ENROLLMENT 
PERIOD 
24 months 


Clinical Study Protocol 
HCRN ESO17-325 
7 
Version Date: 01SEP2021 
Confidential 
ESTIMATED STUDY 
DURATION  
42 months 
 
 
 
 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
8 
Version Date: 01SEP2021 
Confidential 
TABLE OF CONTENTS 
 
Schema ............................................................................................................................... 9 
1. 
Background and Rationale ................................................................................... 10 
2. 
Objectives and Endpoints...................................................................................... 19 
3. 
Eligibility Criteria .................................................................................................. 20 
4. 
Subject Registration............................................................................................... 24 
5. 
Treatment Plan....................................................................................................... 24 
6. 
Toxicities and Dose Delays/Dose Modifications .................................................. 26 
7. 
Study Calendar & Evaluations ............................................................................. 30 
8. 
Biospecimen Studies and Procedures ................................................................... 33 
9. 
Criteria for Disease Evaluation ............................................................................ 34 
10 
Drug Information ................................................................................................... 37 
11 
Adverse Events ....................................................................................................... 38 
12 
Statistical Methods ................................................................................................. 44 
13 
Trial Management ................................................................................................. 45 
14. Data Handling and Record Keeping .................................................................... 47 
15 
Ethics ....................................................................................................................... 48 
16 
References ............................................................................................................... 50 
 
 
 
 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
9 
Version Date: 01SEP2021 
Confidential 
SCHEMA 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Patients with metastatic esophageal/GEJ/proximal gastric adenocarcinoma  
 
Previously treated with 2 lines of platinum containing chemotherapy 
 
Harbor genome high LOH and/or deleterious HR gene alteration(s). In addition, 
patients with germline mutations in HR genes specified will be allowed. 
 
Meet all other eligibility criteria 
Niraparib flat dose orally daily for 28 days 
Continue until disease progression, unacceptable 
toxicity, death, withdrawal of consent   
Stage 1 (n=18) 
≤ 2 responses 
> 2 responses 
Study stopped for futility 
Continue to Stage 2 
(n=25) 
≤ 7 responses 
> 7 responses 
Further study of niraparib 
will be pursued 
Niraparib will not be 
studied further for this 
indication


Clinical Study Protocol 
HCRN ESO17-325 
10 
Version Date: 01SEP2021 
Confidential 
1. 
BACKGROUND AND RATIONALE 
 
1.1 
Esophageal adenocarcinoma  
Esophageal cancer is the 8th most common cancer globally and the 6th most common cause of 
cancer death. Nearly 0.5 million patients are diagnosed with esophageal cancer annually [1]. 
Adenocarcinoma of the esophagus and gastroesophageal junction (GEJ) is the fastest rising 
cancer in the US and the Western world. Adenocarcinoma of the esophagus is the most common 
histology diagnosed in the US and the western world. The main risk factor for esophageal 
adenocarcinoma is acid reflux leading to chronic DNA damage which explains the high 
mutational burden noted in esophageal/GEJ adenocarcinomas [2]. Outcomes are extremely poor 
as the majority of patients present with either locally advanced or metastatic disease. Only a third 
of patients diagnosed with locally advanced esophageal cancer are cured. The majority of 
patients relapse and ultimately succumb to the disease. Median overall survival with currently 
available chemotherapy regimens is 12 months in patients with metastatic disease. Five year 
survival of esophageal cancer remains at 17%. There is an immense need for new therapies in 
this disease. 
 
The standard of care in the first line treatment of HER2 negative metastatic esophageal 
adenocarcinoma is a platinum-based regimen most commonly in combination with a 
fluoropyrimidine[3]. FOLFOX is one of the most commonly used regimens in the first line 
setting of HER2 negative metastatic esophageal adenocarcinoma. Response rate is 40-50% with 
median progression free survival of 6 months[4]. Second line treatment options are limited and 
mainly include docetaxel single agent with a partial response rate of 7% and ramucirumab alone 
or in combination with paclitaxel[5] [6]. The combination of ramucirumab with paclitaxel has 
significant toxicity especially in patients with neuropathy from FOLFOX[7]. In addition not all 
patients qualify for ramucirumab with the risk of bleeding that exists as a result of primary 
esophageal tumors that at times are ulcerated. Herceptin is the only FDA approved targeted 
treatment based on the TOGA trial where it was shown to improve survival in combination with 
chemotherapy in the quarter of patients harboring HER2 amplification[8]. Targeted treatments 
have otherwise been lacking in esophageal adenocarcinoma. 
 
1.2 
Homologous Recombination in esophageal adenocarcinoma 
Esophageal adenocarcinoma especially of the distal esophagus and gastroesophageal junction 
results from decades of gastroesophageal reflux induced DNA damage.  During gastroesophageal 
reflux disease, esophageal cells are exposed to refluxate which contains gastric acid frequently 
mixed with duodenal bile[9]. This may lead to mucosal injury and Barrett’s metaplasia (BE) the 
most important factors contributing to development of esophageal adenocarcinoma. Multiple 
forms of acid induced DNA damage have been described including DNA single strand breaks 
(SSBs), double strand breaks (DSBs) and reactive oxygen species (ROS). These changes are 
induced by the combination of low pH and bile acid [10] [11]. Severe DNA damage can lead to 
apoptosis but in addition can result in changes consistent with Barretts’ esophagus [12] [13]. In 
fact, Barretts’ esophagus cell lines seem more resistant to the DNA damage induced by 
gastroesophageal reflux disease and Barretts’ esophagus potentially represents one of 
mechanisms for overcoming acid induced DNA damage. Homologous recombination defects 
have been described in esophageal adenocarcinoma and potentially occur in response to the 
DNA damage noted in the environment[14]. In fact, analysis of the TCGA shows abnormalities 


Clinical Study Protocol 
HCRN ESO17-325 
11 
Version Date: 01SEP2021 
Confidential 
in HR genes (figure 2) can be seen in at least 40% of patients with esophageal adenocarcinoma. 
Our analysis of the TCGA in figure 2 highlights the HR genes that are mutated or amplified in 
esophageal adenocarcinoma. Figure 3 highlights the prevalence of HR abnormalities in 
esophageal adenocarcinoma TCGA data. 
 
Published Data 
from our 
laboratory shows 
dysregulation of 
HR in esophageal 
adenocarcinoma 
with 
overexpression of 
RAD51, EME1 
and BRCA1. 
RAD51 
overexpression has 
been shown in 
esophageal 
adenocarcinoma 
and in multiple 
myeloma to lead to 
chromosomal 
abnormalities and genomic instability[14] 
[15] HR plays a major role in genome  
integrity maintenance through the repair of 
DNA DSBs. Therefore HR dysregulation is 
likely to lead to chromosomal 
rearrangements or high LOH [16]. 
Sensitivity to PARP inhibition has been 
shown to be a surrogate for HR defects or 
what has at times been described as 
BRCAness phenotype[17] [18]. 
Unpublished data from our laboratory 
support that the PARP inhibitor, BMN673 
(Talazoparib), has significant single agent 
activity in SK-GT-4, OAC, and FLO-1 
esophageal adenocarcinoma cell lines with 
IC50s in the 10-60 nM range. These 
findings in addition to published data 
showing high response rates of HR 
defective prostate cancer and ovarian 
cancer to PARP inhibitors and the 
frequency of HR abnormalities in 
esophageal adenocarcinoma provides the  
basis for the study of PARP inhibitor  
Figure 2:TCGA analysis of esophageal cancer 
Figure 3: Prevalence of HR alterations in esophageal cancer 


Clinical Study Protocol 
HCRN ESO17-325 
12 
Version Date: 01SEP2021 
Confidential 
activity in the subset of esophageal/GEJ/proximal gastric adenocarcinomas with HR defects or 
high genome wide LOH[19]. 
 
Genetic alterations of different HR pathway genes are associated with human cancers, with the 
percentage of tumors affected by HR defects varying considerably across different tumor types 
[16]. An alternative approach to identifying patients with HRD due to mechanisms other than a 
BRCA mutation is to detect genomic scars within the tumor, which arise from the error-prone 
DNA repair pathways when HR is compromised. One such method is to assess genomic scarring 
by quantifying the extent of LOH (Loss of Heterozygosity) across the tumor genome (tumor 
genomic LOH). LOH has been shown to correlate with response to PARP inhibitors[20]. LOH is 
noted in 15-20% of patients with esophageal adenocarcinoma based on our analysis of the TCGA 
data. The newly recognized molecular subtypes of stomach and esophageal adenocarcinoma vary 
in the likelihood of harboring high LOH with the chromosomal instable tumors showing highest 
LOH frequency. 
 
1.3 
Background of PARP and Homologous Recombination Deficiency 
Poly(ADP-ribose) polymerase (PARP)1 and PARP2 are zinc-finger deoxyribonucleic acid 
(DNA)-binding enzymes that play a crucial role in DNA repair[18].Upon formation of DNA 
breaks, PARP binds at the end of broken DNA strands, a process that activates its enzymatic 
activity. 
 
Activated PARP catalyzes the addition of long polymers of adenosine diphosphate (ADP)-ribose 
onto PARP and several other proteins associated with chromatin, including histones and various 
DNA repair proteins[21] [22]. This results in chromatin relaxation, fast recruitment of DNA 
repair proteins, and efficient repair of DNA breaks. In this manner, PARP plays a key role in 
sensing DNA damage and converting it into intracellular signals that activate the base excision 
repair (BER) and single-strand break repair pathways. Normal cells repair up to 10,000 DNA 
defects daily, and single-strand breaks are the most common form of DNA damage. Cells that 
are unable to repair this burden of DNA damage, such as those with defects in the homologous 
recombination or BER pathways, are at risk for accumulating multiple lesions that will 
ultimately trigger apoptosis. They enter the S phase (DNA replication) of the cell cycle with 
unrepaired single- and double-strand breaks. Pre-existing single-strand breaks are converted to 
double-strand breaks as the replication machinery passes. Accumulated double-strand breaks 
present during S phase are repaired by homologous recombination. Homologous recombination 
is the preferred repair pathway because it is associated with a much lower error rate than other 
forms of repair. Cells that are unable to perform DNA repair via homologous recombination 
(e.g., due to inactivation of genes required for homologous recombination, such as breast cancer 
[BRCA1]- or breast cancer 2 [BRCA2]-mutated cells) are at risk for accumulating multiple 
lesions that will ultimately trigger apoptosis. These cells accumulate stalled replication forks 
during S phase and are more likely to use the error-prone nonhomologous end joining (NHEJ) or 
alternative (alt)-NHEJ pathways to repair double-strand breaks in DNA. Accumulation of errors 
in DNA by NHEJ contributes to mutation burden that promotes the development of cancer. Over 
time, the buildup of excessive DNA errors in combination with the inability to complete S phase 
(because of stalled replication forks) contributes to cell death[21] [22]. 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
13 
Version Date: 01SEP2021 
Confidential 
Treatment with PARP inhibitors could represent a novel opportunity to selectively kill a subset 
of cancer cells with deficiencies in DNA repair pathways. For example, a tumor arising in a 
patient with a germline BRCA mutation (gBRCAmut) has a defective homologous recombination 
DNA repair pathway and would be increasingly dependent on NHEJ, alt-NHEJ, and BER for 
maintenance of genomic integrity. PARP inhibitors block alt-NHEJ and BER, forcing tumors 
with BRCA deficiencies to use the error-prone NHEJ to fix double-strand breaks[18]. Non-
BRCA deficiencies in homologous recombination DNA repair genes could also enhance tumor 
cell sensitivity to PARP inhibitors[23]. The rationale for anticancer activity in a subset of 
non-gBRCAmut tumors is that they share distinctive DNA repair defects with gBRCAmut 
carriers, a phenomenon broadly described as “BRCAness”[24]. DNA repair defects can be 
caused by germline or somatic alterations to the homologous recombination DNA repair 
pathway. In a recent analysis of approximately 500 high-grade serous ovarian adenocarcinoma 
tumors, approximately 50% contained homologous recombination defects[25] A subset of these 
tumors had biologically plausible molecular alterations that may make them sensitive to PARP 
inhibition by niraparib. A similar analysis of triple-negative breast cancer indicates that 43% to 
44% of these patients have tumors with homologous recombination defects[26] Homologous 
recombination is a complex pathway, and several genes other than BRCA1 and BRCA2 are 
required either to sense or repair DNA double-strand breaks via the homologous recombination 
pathway.  Germline mutations in PALB2, BRCA1 and RAD51C have been reported in both 
patients with esophageal and gastric cancers[27]. Therefore, PARP inhibitors are also selectively 
cytotoxic for cancer cells with deficiencies in DNA repair proteins other than BRCA1 and 
BRCA2.[18] [24] [28].  
 
Recent clinical studies have shown PARP inhibitors to be active in breast and ovarian cancer. 
Clinical anticancer activity with PARP inhibitors has been seen in both patients with gBRCAmut 
and without gBRCAmut; however, activity is more robust in patients with the germline 
mutation.[18] [23] [29-35] PARP inhibitors have significant activity in prostate cancer that 
harbors mutations in ATM and ATR genes, in addition to BRCA1 and BRCA2 mutations[36] 
[37] [19]. In summary, treatment with PARP1/2 inhibitors represents a novel opportunity to 
selectively kill a subset of cancer cell types by exploiting their deficiencies in DNA repair. 
Human cancers exhibit genomic instability and an increased mutation rate due to underlying 
defects in DNA repair. These deficiencies render cancer cells more dependent on the remaining 
DNA repair pathways, and targeting these pathways is expected to have a much greater impact 
on the survival of the tumor cells than that of normal cells. In fact it has been suggested that all 
cancers display defects in DNA repair and exploiting these defects can have significant impact 
on the landscape of cancer treatment [38]. PARP inhibitors have not been studied in esophageal 
adenocarcinoma.  One study evaluated the combination of olaparib with paclitaxel in gastric 
cancer and did not meet its primary endpoint yet that study was not in a defined molecular 
subset[39]. However as previously mentioned there is strong scientific rationale for assessing the 
activity of PARP inhibitors in the molecularly defined subset of esophageal and gastric cancers 
with HR defects.  
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
14 
Version Date: 01SEP2021 
Confidential 
1.4 
Niraparib 
 
1.4.1 Background of Niraparib 
Niraparib is a potent, orally active PARP1 and PARP2 inhibitor being developed as a treatment 
for patients with tumors that harbor defects in the homologous recombination DNA repair 
pathway or that are driven by PARP-mediated transcription factors. 
 
1.4.2 Nonclinical Experience  
Nonclinical data on niraparib are discussed in detail in the niraparib Investigator’s Brochure (IB). 
Briefly, in nonclinical models, niraparib has been observed to inhibit normal DNA repair 
mechanisms and induce synthetic lethality when administered to cells with homologous 
recombination defects. In a BRCA1-mutant xenograft study, niraparib dosed orally caused tumor 
regression, which was mirrored by a >90% reduction in tumor weight compared with control. In 
a BRCA2-mutant xenograft study, niraparib-dosed mice showed 55% to 60% growth inhibition, 
both by tumor volume and weight. 
 
Niraparib displayed strong antitumor activity in in vivo studies with BRCA1-mutant breast 
cancer (MDA-MB-436), BRCA2-mutant pancreatic cancer (CAPAN-1), and with patient-
derived Ewing sarcoma mice models. Utilizing patient-derived ovarian and breast cancer 
xenograft models, niraparib demonstrated response in both BRCAmut and BRCA wild-type 
tumors. 
 
1.4.3 Clinical Experience  
Niraparib clinical data are discussed in detail in the niraparib IB. In the Phase 1 clinical program, 
niraparib, as a monotherapy or in combination with chemotherapy, has been administered to 144 
patients. 
 
Phase 1 Study of Niraparib Monotherapy in Advanced Solid Tumors 
Niraparib clinical data are discussed in detail in the niraparib IB. In the Phase 1 clinical program, 
niraparib, as a monotherapy or in combination with chemotherapy, has been administered to 
144 patients. 
 
Phase 1 Study of Niraparib Monotherapy in Advanced Solid Tumors 
Clinical activity data for niraparib administered as monotherapy in patients with ovarian cancer 
are available from 1 early-phase clinical study. In Parts A and B of the Phase 1 study PN001 
(ClinicalTrials.gov identifiers: MK-4827-001 and 2008_501), 100 patients with advanced solid 
tumors who had received a median of 3 prior therapies were enrolled; 49 patients had ovarian 
cancer (13 platinum-sensitive, 35 platinum-resistant, and 1 platinum-refractory)[31]  
 
The most common nonhematological TEAEs were nausea, fatigue, anorexia, constipation, 
vomiting, and insomnia. These TEAEs were mainly mild to moderate in severity, self-limiting, 
and manageable with standard treatments. Hematological toxicity appeared to be dose 
proportional and most frequently arose in the setting of cumulative doses. Anemia was reported 
in 48 (48%) of 100 patients and was Grade ≥3 in 10 (10%) of 100 patients. Thrombocytopenia 
was less common (35 [35%] of 100 patients) and was Grade ≥3 in 15 (15%) of 100 patients. 
Neutropenia was the least commonly reported (24 [24%] of 100 patients), and was Grade 3 in 


Clinical Study Protocol 
HCRN ESO17-325 
15 
Version Date: 01SEP2021 
Confidential 
4 (4%) of 100 patients at niraparib doses of 300 and 400 mg. In all cases, hematological TEAEs 
were uncomplicated and reversible. Twenty patients required dose reductions (usually by 1 dose 
level) for recurrent anemia or thrombocytopenia. Treatment was discontinued due to AEs in 
7 patients, including the 4 patients who had DLTs during the first cycle and 3 patients who had 
Grade 3 vomiting, Grade 2 prolongation of QT interval, and Grade 3 prolongation of QT 
interval. No treatment-related deaths occurred. 
 
Of the 49 patients, 22 had confirmed BRCA1 or BRCA2 mutation, of whom 20 were 
radiologically assessable. Eight (40%) of these 20 patients achieved a confirmed partial response 
(PR) by Response Evaluation Criteria in Solid Tumors (RECIST) and cancer antigen 125 
(CA-125) Gynecologic Cancer Intergroup criteria at doses ranging from 80 to 400 mg per day. 
Median response duration was 387 days (range: 159 to 518 days). Three (33%) of 9 patients with 
platinum-resistant BRCAmut ovarian cancer had a partial response (PR) by RECIST and CA-
125 criteria. In patients with platinum-sensitive disease, 5 (50%) of 10 patients (95% CI: 19 to 
81) with BRCA1 or BRCA2 mutations had RECIST and CA-125 responses. 
 
Phase 3 Study of Niraparib Monotherapy in Platinum-sensitive, Recurrent Ovarian Cancer 
In the randomized, double-blind, Phase 3 NOVA trial (Niraparib Maintenance Therapy in 
Platinum-Sensitive, Recurrent Ovarian Cancer), a total of 553 patients were randomized at 
107 centers worldwide[33]. Patients were categorized according to the presence or absence of a 
gBRCAmut (gBRCA cohort and non-gBRCA cohort) within their tumors and the type of 
non-gBRCAmut and were randomly assigned in a 2:1 ratio to receive niraparib (300 mg) or 
placebo once daily (QD). The primary end point was PFS. The study enrolled 203 patients in the 
gBRCAmut cohort and 350 patients in the non-gBRCAmut cohort. Among the 350 patients in the 
non-gBRCAmut cohort, 162 had tumors that were identified as homologous recombination 
deficiency positive (HRDpos), and 134 had tumors that were HRD negative (HRDneg). HRD 
status was not determined for 54 patients. 
 
Demographic and baseline characteristics were well balanced.  Table 1 below shows the results 
for the PFS primary endpoint for each of the 3 primary efficacy populations (ie, gBRCAmut 
cohort, HRDpos cohort, and overall non-gBRCAmut cohort). In addition, median PFS in patients 
with HRDneg tumors was 6.9 months (95% confidence interval [CI]: 5.6, 9.6) in the niraparib 
arm, versus 3.8 months (95% CI: 3.7, 5.6) in the placebo arm, with a HR of 0.58 (95% CI: 0.361, 
0.922) (p = 0.0226). 
 
 
gBRCAmut Cohort 
Non-gBRCAmut 
Cohort (Regardless of 
HRD Status) 
HRDpos (Within 
non - gBRCAmut 
Cohort) 
 
Niraparib 
(n = 138) 
Placebo 
(n = 65) 
Niraparib 
(n = 234) 
Placebo 
(n = 116) 
Niraparib 
(n = 106) 
Placebo 
(n = 56) 
Median PFS 
(95% CI)(i) 
21.0 
(12.9, NE) 
5.5 
(3.8, 7.2) 
9.3 
(7.2, 11.2) 
3.9 
(3.7, 5.5) 
12.9 
(8.1, 15.9) 
3.8 
(3.5, 5.7) 
p-value(ii) 
< 0.0001 
< 0.0001 
< 0.0001 
HR 
(niraparib:placebo) 
(95% CI)(iii)
0.27 
(0.173, 0.410) 
0.45 
(0.338, 0.607) 
0.38 
(0.243, 0.586) 


Clinical Study Protocol 
HCRN ESO17-325 
16 
Version Date: 01SEP2021 
Confidential 
Table 1: Progression-Free Survival in Ovarian Cancer Patients in NOVA 
Source: PR-30-5011-C (NOVA main) CSR 
 
Abbreviation: CI = confidence interval; CSR = clinical study report; gBRCAmut = germline 
BRCA mutation; HR = hazard ratio; HRD = homologous recombination deficiency; HRDpos = 
homologous recombination deficiency positive; NE = not evaluated; PFS = progression-free 
survival. 
 
a PFS is defined as the time in months from the date of randomization to progression or death. 
b Based on stratified log-rank test using randomization stratification factors. 
c Based on the stratified Cox proportional hazards model using randomization stratification 
factors. 
 
The primary data to support the safety of treatment with niraparib are derived from the NOVA 
main study in which a total of 546 patients received study treatment. 
 
All 367 patients who received niraparib and 171 (96%) of 179 patients who received placebo 
experienced at least 1 treatment-emergent adverse event (TEAE). The high rate of TEAEs in the 
placebo group indicates the burden of prior chemotherapy and the patient’s underlying ovarian 
cancer. Review of the data across study cohorts for TEAE incidence showed that, in general, the 
results were similar in the gBRCAmut and non-gBRCAmut cohorts. In the overall safety 
population, for the niraparib versus placebo treatment arms, the incidences of Grade 3 or 4 
TEAEs (74% vs. 23%), serious adverse events (SAEs) (30% vs. 15%), TEAEs leading to 
treatment interruption (67% vs. 15%), TEAEs leading to dose reduction (69% vs. 5%), and 
TEAEs leading to treatment discontinuation (15% vs. 2%) were higher for niraparib than for 
placebo. There were no on-treatment deaths reported. 
 
The most commonly observed nonhematologic TEAEs (all grades) observed in niraparib-treated 
compared with placebo-treated patients were nausea (74% vs. 35%), fatigue (46% vs. 32%), 
constipation (40% vs. 20%), and vomiting (34% vs. 16%). The majority of the nonhematological 
TEAEs were mild to moderate in severity. The most commonly observed hematologic TEAEs 
(all grades) of niraparib were anemia (49%), thrombocytopenia (46%), decreased platelet count 
(20%), and neutropenia (18%). Although Grade 3 or 4 hematologic laboratory AEs were 
common at the initiation of study treatment, no severe clinical sequelae were observed, and 
relatively few patients discontinued study treatment due to these AEs. Dose adjustment based on 
individual tolerability during the first 3 cycles substantially reduced the incidence of these AEs 
beyond Cycle 3, indicating the overall effectiveness of the approach to dose modification. These 
TEAEs can be monitored routinely using standard assessments of hematological laboratory 
parameters, as is routine for patients with ovarian cancer receiving anticancer therapies. In the 
NOVA study, niraparib dose adjustment tended to occur early with most patients reaching their 
individual adjusted dose level at the end of Month 3 (ie, Cycle 3) of treatment. 
 
Myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML) have been observed in 
patients receiving treatment with olaparib, a PARP inhibitor; given the common mechanism of 
action, MDS and AML therefore represent a potential risk to patients receiving niraparib. In the 
Phase 3 NOVA study, the incidence of MDS/AML in patients who received niraparib 


Clinical Study Protocol 
HCRN ESO17-325 
17 
Version Date: 01SEP2021 
Confidential 
(5 of 367; 1.4%) was similar to its incidence in patients who received placebo (2 of 179; 1.1%). 
Guidance on monitoring patients for new AEs of MDS/AML and the follow-up of patients with 
suspected MDS/AML is provided. 
 
Study PR-30-5011-C1 (NOVA corrected QT interval [QTc] substudy; n = 26) is an open-label 
evaluation of the effects of niraparib on QTc measurements in patients with histologically 
diagnosed ovarian cancer, fallopian tube cancer, or primary peritoneal cancer. There were no 
reports of clinically significant abnormal electrocardiogram (ECG) changes, including QTc 
interval prolongation, attributed to niraparib. Administration of niraparib at the therapeutic dose 
did not prolong the QT interval. There was no correlation between the exposure level (ie, plasma 
concentration) of niraparib and QTc changes (i.e., change in corrected QT interval calculated 
using Fridericia’s formula [ΔQTcF]).  
 
Baseline Platelet Count and Weight as Predictors of Thrombocytopenia 
An analysis was conducted using the data collected in ENGOT-OV16/NOVA and the initial 
phase I study, PN001. This analysis determined that only baseline platelets had an impact on 
platelet nadir; lower baseline platelets (<180 109/L) were associated with an increased frequency 
of thrombocytopenia Grade ≥1 (76%) or Grade ≥ 3 (45%) compared to patients with higher 
baseline platelet counts. Further, an exploratory analysis of clinical data versus baseline body 
weight from ENGOT-OV16/NOVA was conducted.  For this analysis, the weight categories 
were based on quartiles with the lowest quartile (patients with a body weight less than 58 kg at 
baseline) compared to the highest quartile (patients with a body weight greater than or equal to 
77 kg at baseline).  While TEAEs occurred in most patients regardless of body weight, Grade ≥3 
TEAEs, SAEs, and TEAEs leading to dose modification or treatment discontinuation occurred 
more commonly in the weight <58 kg cohort than in the ≥77 kg cohort. In the cohort of patients 
with a body weight <58 kg, approximately 80% of patients had a dose reduction compared to 
59% of patients with a weight greater than or equal to 77 kg. Treatment discontinuations were 
increased in the subjects with lower body weight (24%) compared to patients in the highest 
quartile (10%).      
 
The potential relationship between body weight and TEAEs was further explored in an analysis 
to evaluate the correlation of grade 3 or 4 thrombocytopenia and baseline body weight.  The 
lowest platelet count in the first 30 days was plotted versus baseline body weight to determine if 
low body weight identified a subgroup of patients with higher levels of thrombocytopenia during 
Cycle 1.  In the first 30 days of treatment, a baseline body weight >77 kg is associated with a 
lower incidence of grade 3 or 4 thrombocytopenia (14%) relative to the group with body weight 
<58 kg (43%).  
 
Finally, a classification tree approach was used to refine the best cut-off points for predicting the 
likelihood of a patient developing ≥Grade 3 thrombocytopenia within 30 days after the first dose 
of niraparib.  The results of the model show that the subgroup of patients with a baseline body 
weight <77 kg or baseline platelet count <150,000 µL had a grade 3/4 thrombocytopenia rate in 
the first 30 days of 35.4% compared to 11.5% in the group of patients with a body weight >77 kg 
and a platelet count >150,000 µL. Further, the average daily dose was 258 mg through the first 
two cycles for patients with a body weight >77 kg and platelet count >150,000 µL, and was only 
206 mg for patients with body weight < 77 kg or platelet count <150,000 µL. Thus, the actual 


Clinical Study Protocol 
HCRN ESO17-325 
18 
Version Date: 01SEP2021 
Confidential 
delivered dose approximated a starting dose of 200 mg despite the intended delivery of a starting 
dose of 300 mg. These observations are to be confirmed in the present study with the inclusion of 
study treatment dosed at 200 mg (2 capsules of niraparib or placebo) in patients whose baseline 
weight is <77 kg or baseline platelet count is <150,000 µL. 
 
1.5 
Rationale for this study 
PARP inhibitors are synthetically lethal to tumor cells with homologous recombination repair 
deficiency (HRD). HRD can result from deleterious BRCA1/2 mutations or other mechanisms. 
HRD leads to a common phenotype of genome-wide loss of heterozygosity (LOH) and is 
associated with sensitivity to PARP inhibitors in ovarian cancer and other malignancies such as 
prostate cancer. Esophageal and stomach adenocarcinomas demonstrate a high frequency of 
HRD and LOH. Targeted treatments are lacking and our preclinical data shows a potential role 
for PARP inhibition in the treatment of esophageal cancers. HRD and LOH are potential robust 
biomarkers for predicting response to PARP inhibition. Other biomarkers include the clinical 
observation that platinum refractory tumors are less likely to respond to PARP inhibition. In this 
study we will exclude patients that progress during the first 2 months of platinum-based therapy 
for metastatic disease or within 2 months of chemotherapy and radiation for locally advanced 
disease. We will assess LOH and correlation with response to PARP inhibitors as a correlative 
endpoint. 
 
1.5.1 Rationale for the HR genes selected 
We analyzed the TCGA database and selected the HR genes with reported deleterious alterations 
in esophageal and stomach cancers. In addition, we reviewed the literature including prostate 
cancer NEJM paper and included HR genetic alterations with most likely sensitivity to PARP 
inhibition[19].  We included at-Rich Interaction Domain IA(ARID1A) as one of the genes to be 
tested. ARID1A is a tumor suppressor that is mutated in a broad spectrum of human cancers. It is 
recruited to DNA double strand breaks (DSBs) via its interaction with the upstream DNA 
damage checkpoint kinase ATR. It facilitates efficient processing of DSB to single strand ends 
and sustains the DNA damage signaling. Deficiency or loss of ARID1A sensitizes cancer cells to 
PARP inhibitors both in vitro and in vivo. Based on precision genomics clinic data at our IUSCC, 
ARID1A is mutated in 7% of esophageal adenocarcinoma. Based on analysis of TCGA data and 
a recent retrospective analysis performed by Foundation and presented at ASCO GI symposium, 
ARID1A is mutated in 9% of esophageal adenocarcinomas and 20% of gastric 
adenocarcinomas[42]. In addition we included GEN1, a holliday junction endonuclease that 
plays a role in repair of DNA DSBs and is mutated in 2% of esophageal adenocarcinomas[40]. 
The remaining genes included were selected due to their role in the homologous recombination 
pathway. Tumors that are BRCA mutated have been associated with extreme sensitivity to PARP 
inhibitors as a result of synthetic lethality. This phenomena while most known with BRCA 
mutations has been noted in alterations in a number of the HR genes including ATM, PALB2. 
Only genes with potential role in PARP inhibitor sensitivity or leading to genome instability 
manifested as wide loss of loss of heterozygosity were included.  
 
1.5.2 Rationale for excluding squamous cell carcinoma of the esophagus 
Esophageal adenocarcinoma and squamous cell carcinoma vary greatly in the biology, risk 
factors and outcomes. Esophageal squamous cell carcinomas were found to share more 
similarities with head and neck squamous tumors than esophageal adenocarcinomas. On the 


Clinical Study Protocol 
HCRN ESO17-325 
19 
Version Date: 01SEP2021 
Confidential 
other hand, growing evidence shows that esophageal cancer and stomach cancer share many 
similarities on a biological level. Our study will therefore include esophageal and stomach 
adenocarcinomas but not squamous cell carcinomas of the esophagus.  
 
2. 
OBJECTIVES AND ENDPOINTS 
 
2.1 
Objectives 
 
2.1.1 Primary Objective 
Determine objective response rate (ORR) with niraparib in patients with metastatic 
esophageal/gastroesophageal junction (GEJ)/proximal gastric adenocarcinoma previously treated 
with platinum containing chemotherapy and harboring high genome wide loss of heterozygosity 
(LOH) or defective homologous recombination noted through deleterious alterations in HR 
genes. Genes analyzed will include: BRCA1/2, PALB2, ATM, BARD1, BRIP1, CDK12, 
CHEK2, FANCA, RAD51, RAD51B, RAD51C, RAD51D, RAD54L, NBN, ARID1A and 
GEN1. Patients can have somatic and/or germline mutations. Deleterious mutations in HR genes 
are defined as those that have been previously characterized to be loss-of-function/pathogenic/or 
likely pathogenic as specified per the following databases: Clinvar, OncoKB, or 
BRCAExchange. Mutations or small insertions or deletions that results in truncation, frameshift, 
stop codon loss, or stop codon gain will also be considered deleterious irrespective of their 
presence in the aforementioned databases unless previously characterized to be benign. Copy 
number losses or disruption by fusion will also be considered deleterious irrespective of their 
presence in the aforementioned databases. Gene amplifications or variants of unknown 
significance will not be eligible for inclusion.  Patients are eligible if they have a deleterious 
alteration in one of these pre-specified HR genes, including: BRCA1/2, PALB2, ATM, BARD1, 
BRIP1, CDK12, CHEK2, FANCA, RAD51, RAD51B, RAD51C, RAD51D, RAD54L, NBN, 
ARID1A and GEN1. 
 
2.1.2 Secondary Objectives 
 Evaluate the safety and tolerability of niraparib as defined by CTCAE v5. 
 Determine progression free survival (PFS) with niraparib in above mentioned patient 
population. 
 Evaluate disease control rate (DCR) 
 
2.1.3 Correlative/Exploratory Objectives 
 Assess the correlation between high genome wide LOH in the tumor samples and 
response to treatment with niraparib.  
 Analyze mechanisms of resistance to PARP inhibitors. We will mainly analyze reversion 
mutations in HR genes as a potential mechanism of resistance. 
 Analyze EZH2 expression and its correlation with response and resistance to PARP 
inhibitors. 
 Analyze germline mutations of HR genes from DNA collected from blood samples and 
correlation with response to niraparib. 
 Correlate CTCs with response to treatment. 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
20 
Version Date: 01SEP2021 
Confidential 
2.2 
Endpoints 
 
2.2.1 Primary Endpoint 
 ORR will include confirmed complete response (CR) + confirmed partial response (PR) 
and will be determined as per RECIST 1.1.  
 
2.2.2 Secondary Endpoints 
 Occurrence of all treatment related toxicities as defined by the NCI Common 
Terminology Criteria for Adverse Events (NCI CTCAE) v5. 
 PFS is defined as the time from D1 of treatment until the criteria for disease progression 
is met as defined by RECIST 1.1 or death as a result of any cause, whichever occurs first. 
 Disease control rate is defined as the proportion of all subjects with stable disease (SD) 
for 8 weeks, or partial response (PR), or complete response (CR) according to RECIST 
1.1. 
 
3. 
ELIGIBILITY CRITERIA 
 
3.1 
Inclusion Criteria 
Subject must meet all of the following applicable inclusion criteria to participate in this study: 
 
1. Written informed consent and HIPAA authorization for release of personal health 
information. NOTE:  HIPAA authorization may be included in the informed consent or 
obtained separately. 
 
2. Age ≥ 18 years at the time of consent. 
 
3. ECOG Performance Status of 0-1 within 14 days prior to registration. 
 
4. Locally advanced esophageal adenocarcinoma or proximal gastric adenocarcinoma or 
metastatic adenocarcinoma originating from esophagus, GE junction, or proximal 
stomach who progress/recur beyond 2 months of receiving a platinum- containing 
regimen.  
 
NOTE: Patients can be pre-screened for study at any time including after surgical 
resection for locally advanced esophageal cancer, at presentation with metastatic disease 
and potentially during chemotherapy and radiation prior to surgery. 
 
5. A subject with symptomatic brain metastasis may be considered if they have completed 
their treatment for brain metastasis at least 4 weeks prior to study registration, have been 
off of corticosteroids for ≥ 2 weeks, and are asymptomatic. Patients with asymptomatic 
brain mets that are untreated will be allowed. 
 
6. Must not have received more than 2 prior lines of chemotherapy in the metastatic setting 
(could have received immunotherapy, VEGF directed therapy, and/or trastuzumab which 
does not count as chemotherapy). 
 


Clinical Study Protocol 
HCRN ESO17-325 
21 
Version Date: 01SEP2021 
Confidential 
7. One of the following genetic results is required for eligibility: 
 High LOH in tissue OR  
 HR mutation in tissue OR  
 HR mutation in liquid biopsy OR 
 Germline mutation (blood)  
 
NOTE: Mutations, deletions or loss by fusions are the acceptable alterations in HR genes 
as long as they are deleterious. Patients are eligible if they have a mutation in pre-
specified HR genes BRCA1/2, PALB2, ATM, BARD1, BRIP1, CDK12, CHEK2, 
FANCA, RAD51, RAD51B, RAD51C, RAD51D, RAD54L, NBN, ARID1A and GEN1.  
Deleterious mutations in HR genes are defined as those that have been previously 
characterized to be loss-of-function/pathogenic/or likely pathogenic as specified per the 
following databases: Clinvar, OncoKB, or BRCAExchange. Mutations or small insertions 
or deletions that results in truncation, frameshift, stop codon loss, or stop codon gain will 
also be considered deleterious irrespective of their presence in the aforementioned 
databases unless previously characterized to be benign. Copy number losses or disruption 
by fusion will also be considered deleterious irrespective of their presence in the 
aforementioned databases. Gene amplifications or variants of unknown significance will 
not be eligible for inclusion. 
 
NOTE: Genetic testing results from a CLIA certified lab that confirm one of the 
following: high LOH in tissue, HR mutation in tissue or liquid biopsy or germline 
mutation in blood are required and can be used to meet eligibility. Even if subject has met 
eligibility with one of the criteria above, results from the other analysis is required if 
available.  
 
If prior genetic results are not available, subject must have archival tissue or fresh tissue 
(by new biopsy) for testing. Both primary tumor tissue and metastatic site sample 
biopsies are allowed. Blood will also be required for germline mutation analyses. Central 
confirmation of all results will be performed but is not mandated for eligibility. If a 
subject has met eligibility with prior genetic results but does not have sufficient archival 
tissue for central confirmation, a biopsy is not required. Prior results from liquid biopsy 
can be used for eligibility. This may not be confirmed centrally. 
 
8. Presence of measurable disease by RECIST v1.1, defined as:  
 Tumor lesions that must be accurately measured in at least one dimension (longest 
diameter in the plane of measurement is to be recorded) with a minimum size of: 
o 10 mm by CT scan (CT scan slice thickness no greater than 5 mm) 
o 10 mm caliper measurement by clinical exam (lesions which cannot be 
accurately measured with calipers should be recorded as non-measurable) 
o 20 mm by chest X-ray 
 Malignant lymph nodes: To be considered pathologically enlarged and measurable, a 
lymph node must be ≥ 15 mm in short axis when assessed by CT scan (CT scan slice 
thickness recommended to be no greater than 5 mm). At baseline and in follow-up, 
only the short axis will be measured and followed.   


Clinical Study Protocol 
HCRN ESO17-325 
22 
Version Date: 01SEP2021 
Confidential 
9. Prior cancer treatment must be completed at least 14 days prior to registration and the 
subject must have recovered from all reversible acute toxic effects of the regimen (other 
than alopecia) to ≤ Grade 1 or baseline. 
 
10. Demonstrate adequate organ function as defined in the table below; all screening labs to 
be obtained within 14 days prior to registration.  
 
System 
Laboratory Value 
Hematological
Absolute Neutrophil Count (ANC)
≥ 1.5 K/mm3
Hemoglobin (Hgb)
≥ 9 g/dL
Platelet Count (Plt)
≥ 100 K/ mm3
Renal
Creatinine
≤ 1.5 X upper limit of normal (ULN)
Hepatic
Bilirubin 
≤ 1.5× ULN ((≤2.0 in patients with known 
Gilberts syndrome))
Aspartate aminotransferase (AST) 
≤2.5× ULN*
Alanine aminotransferase (ALT) 
≤2.5 × ULN*
* unless liver metastases are present in which case AST/ALT must be ≤ 5x ULN 
 
11. Females of childbearing potential must have a negative pregnancy test within 7 days prior 
to study treatment. Urine or serum βhCG if clinically appropriate. If a urine test is done 
and it is positive or cannot be confirmed as negative, a serum pregnancy test will be 
required. NOTE: Females are considered of child bearing potential unless they are 
surgically sterile (have undergone a hysterectomy, bilateral tubal ligation, or bilateral 
oophorectomy) or they are naturally postmenopausal for at least 12 consecutive months. 
 
12. Females of childbearing potential must be willing to abstain from heterosexual 
intercourse or use adequate contraception as described in Section 5.4. Males must be 
willing to abstain from heterosexual intercourse or use adequate contraception as 
described in Section 5.4.  
 
13. Participants must agree to not breastfeed during the study or for 30 days after the last 
dose of study treatment. 
 
14. As determined by the enrolling physician or protocol designee, ability of the subject to 
understand and comply with study procedures for the entire length of the study. 
 
15. Participant must agree to not donate blood during the study or for 90 days after the last 
dose of study treatment. 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
23 
Version Date: 01SEP2021 
Confidential 
3.2 
Exclusion Criteria 
Subjects meeting any of the criteria below may not participate in the study: 
 
1. Prior therapy with a PARP inhibitor. 
 
2. Disease progression during first 2 months of standard dose platinum-based chemotherapy 
(platinum refractory). This excludes low dose platinum based therapy that is given in a 
chemotherapy-radiation regimen for locally advanced esophageal cancer. 
 
3. Participant must not be simultaneously enrolled in any other interventional clinical trial. 
 
4. Participant must not have had major surgery ≤ 3 weeks prior to initiating protocol therapy 
and participant must have recovered from any surgical effects. 
 
5. Participant must not have received investigational therapy ≤ 4 weeks, or within a time 
interval less than at least 5 half-lives of the investigational agent, whichever is shorter, 
prior initiating protocol therapy. 
 
6. Participant has had radiation therapy encompassing >20% of the bone marrow within 2 
weeks; or any radiation therapy within 1 week prior to Day 1 of protocol therapy. 
 
7. Participant must not have a known hypersensitivity to niraparib components or excipients 
including tartrazine. 
 
8. Participant must not have received a transfusion (platelets or red blood cells) ≤ 4 weeks 
prior to initiating protocol therapy. 
 
9. Participant must not have received colony-stimulating factors (e.g., granulocyte colony-
stimulating factor, granulocyte macrophage colony-stimulating factor, or recombinant 
erythropoietin) within 4 weeks prior initiating protocol therapy.  
 
10. Participant has had any known Grade 3 or 4 anemia, neutropenia or thrombocytopenia 
due to prior chemotherapy that persisted > 4 weeks and was related to the most recent 
treatment.  
 
11. Participant must not have any known history of myelodysplastic syndrome (MDS) or 
acute myeloid leukemia (AML). 
 
12. Participant must not have a serious, uncontrolled medical disorder, nonmalignant 
systemic disease, or active, uncontrolled infection. Examples include, but are not limited 
to, uncontrolled ventricular arrhythmia, recent (within 90 days) myocardial infarction, 
uncontrolled major seizure disorder, unstable spinal cord compression, superior vena 
cava syndrome, or any psychiatric disorder that prohibits obtaining informed consent. 
 
13. No active secondary cancer. 
 


Clinical Study Protocol 
HCRN ESO17-325 
24 
Version Date: 01SEP2021 
Confidential 
4. 
SUBJECT REGISTRATION 
All subjects must be registered through HCRN’s electronic data capture (EDC) system. Subjects 
must be registered prior to starting protocol therapy. Subjects must begin therapy within 7 
business days of registration.  
 
5. 
TREATMENT PLAN 
 
5.1 
Pre-Medication and Hydration 
There is no required premedication or hydration.   
 
5.2 
Niraparib Administration 
Niraparib will be administered as a flat-fixed daily dose according to the Table 2 below. A cycle 
will equal 28 days. Participants should take their dose at approximately the same time each day.  
Bedtime administration may be a potential method for managing nausea. Niraparib should be 
swallowed whole and not opened, crushed or chewed. Food does not significantly affect the 
absorption of niraparib; therefore, niraparib may be taken without regard to meals. Vomited 
doses should not be made up. If a participant misses a dose (greater than 12 hours from normal 
dosing time) of niraparib, they should skip that dose and take their next dose at its regularly 
scheduled time. Niraparib will be dispensed as a one-month supply. Subjects will be asked to 
complete a pill diary and bring the diary with the pill bottle to each clinic visit. 
 
If niraparib is dose reduced, participants should be instructed to continue using their current 
supply at their new dose until their supply has been exhausted. Participants must be instructed to 
return unused study drugs to the site at discontinuation or completion of treatment. The site 
personnel must ensure that the appropriate dose of each study drug is administered and that the 
drug accountability is performed and documented. 
 
Patients will receive niraparib until disease progression or unacceptable toxicities. 
 
Table 2: Niraparib Dosing  
Baseline Criteria  
Starting Dose  
≥ 77 kg and ≥ 150,000 µL platelets 
300 mg (3 x 100 mg capsules)  
< 77 kg or < 150,000 µL platelets 
200 mg (2 x 100 mg capsules)  
* For patients whose starting dose is 2 capsules once daily, escalation to 3 capsules once daily is 
permitted if no treatment interruption or discontinuation was required during the first 2 cycles of therapy. 
 
5.3 
Concomitant Medications 
 
5.3.1 Allowed Concomitant Medications 
All treatments the investigator considers necessary for a subject’s welfare may be administered 
at the discretion of the investigator in keeping with the community standards of medical care. 
 


Clinical Study Protocol 
HCRN ESO17-325 
25 
Version Date: 01SEP2021 
Confidential 
5.3.2 Prohibited Concomitant Medications 
The following medications are prohibited while receiving protocol therapy: 
 Systemic anticancer (chemotherapy) or biological therapy. 
 Immunotherapy not specified in this protocol. 
 Investigational agents other than niraparib. 
 Radiation therapy encompassing >20% of the bone marrow is prohibited within 2 weeks 
prior to Day 1 and during study treatment. NOTE: Palliative radiation therapy to a small 
field >1 week prior to Day 1 of study treatment may be allowed. This should be discussed 
with the sponsor-investigator and communicated to the project manager at HCRN Any 
surgery that involves tumor lesions. NOTE: Administration of radiation therapy or 
surgery done that involves tumor lesions will be considered as disease progression at the 
time the procedure is performed. 
 Niraparib weakly induces Cytochrome P450 (CYP)1A2 in vitro and is a relatively poor 
substrate for P-glycoprotein (P-gp); therefore, investigators are advised to use caution 
with the substrates for CYP1A2 with a narrow therapeutic range, i.e. theophylline and 
tizanidine.  
 Prophylactic cytokines (i.e., granulocyte colony-stimulating factor [GCSF]) should not be 
administered in the first cycle of the study but may be administered in subsequent cycles 
according to current American Society of Clinical Oncology (ASCO) guidelines.[25]  
 
5.4 
Contraception 
Women of childbearing potential who are sexually active must agree to abstain from 
heterosexual intercourse or use adequate contraception beginning with time of consent, during 
the study treatment and for 180 days after last dose of study treatment(s). Males must be willing 
to abstain from heterosexual intercourse or use a condom from the time of informed consent until 
90 days after treatment discontinuation. This timeframe also applies to sperm donation. If not 
contraindicated, use of a barrier and hormonal method is suggested. See below for options: 
 
Acceptable non-hormonal birth control methods: 
 Total sexual abstinence: refrain from any form of sexual intercourse in line with the 
patients’ usual and/or preferred lifestyle. Abstinence must be for the total duration as 
described above. Periodic abstinence (eg, calendar ovulation, symptothermal, post-
ovulation methods) and withdrawal are not acceptable methods of contraception. 
 Vasectomised sexual partner. With participant assurance that partner received post-
vasectomy confirmation of azoospermia. 
 Tubal occlusion  
 Intrauterine Device. Provided coils are copper-banded. 
 Male condom 
 
Acceptable hormonal methods: 
 Etonogestrel implants (eg, Implanon®, Norplant®)  
 Normal and low dose combined oral pills  
 Hormonal shot or injection (eg, Depo-Provera)  
 Intrauterine system device (eg, levonorgestrel-releasing intrauterine system - Mirena®)  
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
26 
Version Date: 01SEP2021 
Confidential 
5.5 
Breast Feeding 
Participants must not breast-feed while receiving protocol therapy and for 30 days following the 
last dose of protocol therapy. 
 
5.6 
Blood Donation 
Participants must not donate blood during the study or for 90 days after the last dose of protocol 
therapy. 
 
6. 
TOXICITIES AND DOSE DELAYS/DOSE MODIFICATIONS 
The NCI Common Terminology Criteria for Adverse Events (CTCAE) v5 will be used to grade 
adverse events. Subjects enrolled in this study will be evaluated clinically and with standard 
laboratory tests before and at regular intervals during their participation in this study as specified 
in Study Calendar & Evaluations. Subjects will be evaluated for adverse events (all grades), 
serious adverse events, and adverse events requiring study drug interruption or discontinuation as 
specified in Study Calendar & Evaluations.   
 
6.1 
Niraparib 
 Dose interruption and/or modification of niraparib may be implemented due to 
nonhematologic or hematologic toxicities per the site investigator’s judgement after 
Cycle 1.  
 Treatment must be interrupted for any nonhematologic Common Terminology Criteria 
for Adverse Events (CTCAE) Grade 3 or 4 AE that the site investigator considers to be 
related to administration of niraparib (Table 3). Dose adjustments are not required for 
AEs or abnormal laboratory values assessed by the treating physician as not clinically 
significant. If the nonhematologic toxicity is appropriately resolved to baseline or Grade 
≤ 1 within 4 weeks (28 days) of the dose interruption period, the patient may restart 
treatment with niraparib but with a dose level reduction if prophylaxis is not considered 
feasible (see Table 5). If the event recurs at similar or worse grade, treatment should be 
interrupted again and, upon resolution, a further dose reduction must be made according 
to Table 3.  
 If the toxicity requiring dose interruption has not resolved completely or to Grade 1 
during the maximum 4-week (28-day) dose interruption period, and/or the patient has 
already undergone a dose reduction to a minimum dose of 100 mg QD, the patient must 
permanently discontinue treatment with niraparib. 
 The dose interruption and modification criteria for niraparib for hematologic parameters 
will be based on blood counts and are outlined in Table 5. If the hematologic toxicity has 
not recovered to the specified levels within 4 weeks (28 days) of the dose interruption 
period, the patient must permanently discontinue treatment with niraparib. 
 For patients whose initial dose is 3 capsules daily (300 mg/day), dose reductions to 2 
capsules daily (200 mg/day) and subsequently to 1 capsule daily (100 mg/day) will be 
allowed. No further dose reduction will be allowed.  
 For patients whose initial dose is 2 capsules (200 mg/day), dose reduction to 1 capsule 
once daily (100 mg/day) will be allowed. No further dose reduction will be allowed. 
 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
27 
Version Date: 01SEP2021 
Confidential 
Table 3: 
Recommended Dose Modifications for Adverse Reactions 
Dose level 
Initial Dose: 3 capsules per day 
Initial Dose: 2 capsules per day 
Starting dose 
3 capsules once daily (300 mg/day)  
2 capsules once daily (200 mg/day)  
First dose 
reduction 
2 capsules once daily (200 mg/day)  
1 capsule once daily (100 mg/day) 
Second dose 
reduction 
1 capsule once daily (100 mg/day) 
NA 
 
Table 4: Niraparib Dose Modifications for Nonhematologic Adverse Reactions 
Abnormality 
Intervention 
Non-hematologic CTCAE ≥ Grade 3 adverse 
reaction where prophylaxis is not considered 
feasible or adverse reaction persists despite 
treatment
Withhold niraparib for a maximum of 28 days 
or until resolution of adverse reaction. 
Resume niraparib at a reduced dose.  
CTCAE ≥ Grade 3 treatment-related adverse 
reaction lasting more than 28 days while 
patient is administered niraparib 100 mg/day 
Discontinue niraparib. 
Abbreviations: CTCAE = Common Terminology Criteria for Adverse Events. 
 
NOTE: Hypertension, including hypertensive crisis, has been reported with the use of niraparib. 
Pre-existing hypertension should be adequately controlled before starting niraparib treatment. 
Blood pressure and heart rate should be monitored at least weekly for the first 2 months, then 
monthly for the first year and periodically thereafter during treatment with niraparib.  
 
In the clinical program, blood pressure measurements were obtained on Day 1 of each 28 day 
cycle while the patient remained on niraparib. In most cases, hypertension was controlled 
adequately using standard antihypertensive treatment with or without niraparib dose adjustment.  
Hypertension should be medically managed with antihypertensive medicinal products as well as 
adjustment of niraparib dose, if necessary. Niraparib should be discontinued in case of 
hypertensive crisis or if medically significant hypertension (per investigator discretion) cannot be 
adequately controlled with antihypertensive therapy. 
 
There have been rare reports (0.09% of clinical trial patients) of niraparib-treated patients 
developing signs and symptoms that are consistent with Posterior Reversible Encephalopathy 
Syndrome (PRES). PRES is a rare neurologic disorder that can present with the following signs 
and symptoms including seizures, headache, altered mental status, visual disturbance, or cortical 
blindness, with or without associated hypertension. A diagnosis of PRES requires confirmation 
by brain imaging, preferably magnetic resonance imaging (MRI). In patients developing PRES, 
treatment of specific symptoms including control of hypertension is recommended, along with 
discontinuation of niraparib.  
 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
28 
Version Date: 01SEP2021 
Confidential 
Table 5: Niraparib Dose Modifications for Hematologic Toxicity 
 
Laboratory Abnormality 
Intervention 
Monitor complete blood counts weekly for the first month, monthly for the next 11 months of treatment, 
and periodically after this time. 
 
If dose interruption and/or modification is required at any point during study treatment because of 
hematologic toxicity, weekly blood draws for complete blood count (CBC) will be monitored until the 
AE resolves to the specified blood count levels. To ensure the safety of the new dose, weekly blood 
draws for CBC will be required for an additional 4 weeks after the AE has resolved, after which 
monitoring every 4 weeks may resume. CBC monitoring will continue every 4 weeks (ie, monthly) for 
the next 11 months of treatment, and periodically after this time. 
 
Any patient requiring transfusion of platelets or red blood cells (≥1 unit) must undergo a dose reduction 
upon recovery if study treatment is resumed.
Platelet count < 100,000/μL 
First occurrence: 
Withhold niraparib for a maximum of 28 days and monitor blood 
counts weekly until platelet counts return to ≥100,000/μL. 
Resume niraparib at same or reduced dose per Table 3. 
If platelet count is < 75,000/μL, resume niraparib at a reduced 
dose per Table 3. 
Second occurrence: 
Withhold niraparib for a maximum of 28 days and monitor blood 
counts weekly until platelet counts return to ≥100,000/μL. 
Resume niraparib at a reduced dose per Table 3.  
Discontinue niraparib if the platelet count has not returned to 
acceptable levels within 28 days of the dose interruption period, 
or if the patient has already undergone dose reduction to 100 mg 
QD. 
Neutrophil count < 1,000/μL 
Withhold niraparib for a maximum of 28 days and monitor blood 
counts until neutrophil counts return to ≥1,500/μL.  
Resume niraparib at a reduced dose per Table 3. 
Discontinue niraparib if neutrophil level has not returned to 
acceptable levels within 28 days of the dose interruption period, 
or if the patient has already undergone maximum dose reductions 
per Table 3. 
Hemoglobin ≤ 8 g/dL 
Withhold niraparib for a maximum of 28 days and monitor blood 
counts until hemoglobin returns to ≥ 9 g/dL.  
Resume niraparib at a reduced dose per Table 3. 
Discontinue niraparib if hemoglobin has not returned to 
acceptable levels within 28 days of the dose interruption period, 
or if the patient has already undergone maximum dose reductions 
per Table 3. 


Clinical Study Protocol 
HCRN ESO17-325 
29 
Version Date: 01SEP2021 
Confidential 
Hematologic adverse reaction 
requiring transfusion 
For patients with platelet count ≤ 10,000/μL, platelet transfusion 
should be considered. If there are other risk factors such as 
co-administration of anticoagulation or antiplatelet drugs, 
consider interrupting these drugs and/or transfusion at a higher 
platelet count. 
Resume niraparib at a reduced dose per Table 3.   
Confirmed diagnosis of MDS or 
AML 
Permanently discontinue niraparib. 
Abbreviation: AML= acute myeloid leukemia; MDS = myelodysplastic syndrome; QD = once 
daily.  
 
If a diagnosis of MDS/AML is confirmed by a hematologist, the patient must permanently 
discontinue study treatment. 
 
For major surgery while on study treatment, up to 4 weeks (28 days) of study treatment 
interruption is allowed.  
 
6.2 
Protocol Therapy Discontinuation 
In addition to discontinuation from therapy related to toxicities as outlined above, a subject will 
also be discontinued from protocol therapy and followed per protocol under the following 
circumstances outlined below. The reason for discontinuation of protocol therapy will be 
documented on the electronic case report form (eCRF)   
 Documented disease progression by RECIST 1.1 
 Site investigator determines a change of therapy would be in the best interest of the 
subject 
 Subject requests to discontinue protocol therapy, whether due to unacceptable toxicity or 
for other reasons 
o If a subject decides to prematurely discontinue protocol therapy (“refuses treatment”), 
the subject should be asked if he or she may still be contacted for further scheduled 
study assessments. The outcome of that discussion should be documented in both the 
medical records and in the eCRF. 
 Female subject becomes pregnant  
 Serious or life-threatening adverse event 
 Severe noncompliance with protocol as judged by the site investigator or sponsor-
investigator 
 Participant is diagnosed with MDS or AML (as confirmed by a hematologist) 
 Investigator, sponsor-investigator, and/or GSK becomes aware of conditions or events 
that suggest a possible risk or hazard to participants if the clinical study continues 
 
6.3 
Protocol Discontinuation  
If a subject decides to discontinue from the protocol (and not just from protocol therapy) all 
efforts should be made to complete and report study assessments as thoroughly as possible. A 
complete final evaluation at the time of the subject’s protocol withdrawal should be made with 
an explanation of why the subject is withdrawing from the protocol. If the reason for removal of 
a subject from the study is an adverse event, it will be recorded on the eCRF. 


Clinical Study Protocol 
HCRN ESO17-325 
30 
Version Date: 01SEP2021 
Confidential 
7. 
STUDY CALENDAR & EVALUATIONS 
 
Study Evaluation  
Cycle = 28 days 
Screening 
Cycle 1 
Cycle 2 + 
Safety follow 
up visit12 
Long-term 
Follow up13 
-28 days 
Day 1 
Day 15
± 3 days
Day 1
± 3 days
30 days (+7) 
post last dose
(±14 days) 
REQUIRED ASSESSMENTS 
Informed Consent
X
Medical History1
X
Physical Exam
X
X
X
X
Vital signs and ECOG Performance Status2
X
X2
X
X2
X
Review AEs, con meds, pill diary3
X
X
X
X
LABORATORY ASSESSMENTS 
Complete Blood Cell Count with diff (CBC)
X
X11
X11
X11
X
Comprehensive Metabolic Profile (CMP)
X
X11
X11
X
Pregnancy test (serum or urine) (WOCBP)4
X
X
X4
X
DISEASE ASSESSMENT 
CT of chest5
X
X5
CT or MRI of abdomen and pelvis5
X
X5
TREATMENT EXPOSURE 
Niraparib
X
X
X
SPECIMEN COLLECTION  
Archival Tissue or Fresh Tissue by Biopsy6
X6
Standard of Care Biopsy6
X6
X6
Whole Blood for CTCs7
X
X7
X7
X7
Plasma for ctDNA8
X
X8
X8
Whole Blood for eligibility9
X9
BANKING SAMPLES 
Whole blood10
X10
FOLLOW-UP 
Survival Status, Subsequent Therapy 
X
 
 
CBC with differential and platelet to include: WBC, ANC, Hgb, Hct, PLT and lymphocyte count. CMP to include sodium, potassium, chloride, 
creatinine, blood urea nitrogen; liver function tests (LFTs) to include AST, ALT, total bilirubin, alkaline phosphatase  


Clinical Study Protocol 
HCRN ESO17-325 
31 
Version Date: 01SEP2021 
Confidential 
Key to Footnotes  
1: Medical History; other data to obtained during this assessment includes: diagnosis and staging to include pathology report and staging 
documentation. Smoking history questionnaire and trial awareness question. In addition, prior anti-cancer treatment should be documented 
including medications (chemotherapy, checkpoint inhibitors, etc) radiation or surgery. NOTE: Genetic testing results from a CLIA certified lab 
that confirm one of the following: high LOH in tissue, HR mutation in tissue or liquid biopsy or germline mutation in blood are required and can 
be used to meet eligibility. Even if subject has met eligibility with one of the criteria above, results from the other analysis are required if 
available.  
 
2: Vital signs to include blood pressure, temperature, heart rate, weight, and height (screening only) and ECOG performance status.  Blood 
pressure and heart rate will be required weekly for the first 2 months of study treatment (C1D1, C1D8, C1D15, C1D21, C2D1, C2D8, C2D15, 
C2D21), monthly for first year, and periodically thereafter. This may be performed at a clinic visit or with an at home device. Subjects will be 
asked to document the results and bring to each clinic visit.  
 
3: AE assessment and concomitant medication review should include confirmation of study medication taken within the last visit. Subjects will be 
asked to complete a pill diary and bring the diary to each visit with the pill bottle. In addition, assessment for AML/MDS should be performed 
(review of CBC and patient symptoms). For any patient diagnosed with MDS/AML while on study, a bone marrow aspirate/biopsy must be 
completed by a local hematologist. Testing completed as part of standard of care is sufficient as long as the methods are acceptable to GSK. A 
copy of the hematologist's report of aspirate/biopsy findings including a classification according to WHO criteria and other sample testing results 
related to MDS/AML will be provided to the sponsor-investigator and to GSK. 
 
4: For women of childbearing potential (WOCBP): urine or serum βhCG if clinically appropriate. If a urine test is done and it is positive or cannot 
be confirmed as negative, a serum pregnancy test will be required. Testing is required for screening then 7 days prior to initiation of study 
treatment. During treatment, pregnancy test should be done every 3 cycles for WOCBP and at safety follow up visit.  
 
5: Tumor response assessment will consist of evaluation by CT scans of chest and MRI or CT of abdomen and pelvis at screening and every 2 
cycles starting after screening with Cycle 3 (imaging selected for each subject should remain the same throughout the study); tumor imaging to be 
done at treatment discontinuation is at discretion of site investigator. If tumor assessments are available for subjects who have not yet experienced 
progressive disease (PD) at the time treatment is discontinued, the follow-up tumor evaluations will be documented in the eCRF until PD or death 
is confirmed, or until another treatment is initiated. Window of ± 7 days for post screening scans. 
 
6: REQUIRED: If prior genetic results are not available, subject must have archival tissue or fresh tissue (by new biopsy) for eligibility testing. 
Both primary tumor tissue and metastatic site sample biopsies are allowed. In patients without known genetic alterations that qualify them for trial, 
archival tissue must be identified during screening or pre-screening and if not available, subjects must undergo a biopsy for fresh tissue at 
screening for eligibility purposes and correlative analysis. If a subject has met eligibility with prior genetic results but does not have sufficient 
archival tissue for central confirmation, a biopsy is not required. If patient has been previously tested and known to harbor an alteration that makes 
them eligible, archival tissue (if available) will be submitted for centralized testing however it is not mandatory. Refer to the Correlative 


Clinical Study Protocol 
HCRN ESO17-325 
32 
Version Date: 01SEP2021 
Confidential 
Laboratory Manual (CLM) for additional details. OPTIONAL: If a standard of care biopsy is done at progression, a sample for correlative 
analysis will be requested. Consent from the subject will be obtained for this sample. This progression biopsy sample will include both, FFPE and 
flash frozen sections.  Refer to CLM for additional details.  
 
7: REQUIRED: Whole blood for analysis of circulating tumor cells (CTCs) will be drawn prior to treatment C1D1, Day 1 of every odd cycle 
beginning with Cycle 3 and at the time of disease progression. Subjects that discontinue study treatment for a reason other than progression should 
have these samples drawn at progression. Subjects that discontinue study treatment due to progression may have these samples drawn at the safety 
follow up visit. Refer to CLM for additional details. 
 
8: REQUIRED: Plasma for ctDNA will be drawn prior to treatment C1D1 and at the time of disease progression. Subjects that discontinue study 
treatment for a reason other than progression should have these samples drawn at progression. Subjects that discontinue study treatment due to 
progression may have these samples drawn at the safety follow up visit. 
 
9: REQUIRED: Whole Blood for analysis of germline mutations of HR genes will be drawn during screening. Sample may be used for liquid 
biopsy if tumor tissue is insufficient for testing. Refer to CLM for additional details. 
 
10: OPTIONAL: Blood for banking: Whole blood will be collected prior to treatment on Cycle 1 Day 1. Refer to CLM for additional details. 
 
11: If screening (baseline) labs were performed within 7 days of Cycle1 Day 1 of treatment, these do not need to be repeated. Follow up labs and 
clinic visits may be done up to 72 hours prior to the time points designated above. CBCs should be collected weekly for the first Cycle. If dose 
interruption and/or modification is required at any point during study treatment because of hematologic toxicity, weekly blood draws for complete 
blood count (CBC) will be monitored until the AE resolves to the specified blood count levels. To ensure the safety of the new dose, weekly blood 
draws for CBC will be required for an additional 4 weeks after the AE has resolved, after which monitoring every 4 weeks may resume. CBC 
monitoring will continue every 4 weeks (ie, monthly) for the next 11 months of treatment, and periodically after this time. 
 
12: The safety follow-up visit should only occur when subjects permanently stop study treatment for whatever reasons (toxicity, progression, or at 
discretion of site investigator) and should be performed 30 days (+7 days) after the last dose of treatment. Subjects who have an ongoing Grade ≥ 
2 or serious AE (SAE) at this visit will continue to be followed until the AE resolves to ≤ Grade 1 or baseline, deemed clinically insignificant, 
and/or until a new anti-cancer treatment starts, whichever is earlier. 
 
13: Subjects who discontinue study treatment without radiographically documented PD will continue to be evaluated per institutional standards 
until time of disease progression, death or until study completion, except when not feasible in the opinion of the site investigator due to subject's 
clinical status. After the subject has documented PD, radiologic assessments are no longer required and the subject will be followed every 3 
months (± 14 days) until the subject's death or study completion, whichever is earlier. Follow up will be 5 years from the D30 safety follow up 
visit. Follow up may be accomplished via clinic visit, phone call, or other avenues as appropriate. 


Clinical Study Protocol 
HCRN ESO17-325 
33 
Version Date: 01SEP2021 
Confidential 
8. 
BIOSPECIMEN STUDIES AND PROCEDURES 
Please refer to the CLM for additional details regarding biospecimen studies and procedures. 
 
8.1 
Tissue 
 
8.1.1 Archival Tissue or Fresh Tissue prior to Treatment 
If prior genetic results are not available, subject must have archival tissue or fresh tissue (by new 
biopsy) for eligibility testing. Both primary tumor tissue and metastatic site sample biopsies are 
allowed. In patients without known genetic alterations that qualify them for trial, archival tissue 
must be identified during screening or pre-screening and if not available, subjects must undergo 
a biopsy for fresh tissue to determine if they are eligible. If patient has been previously tested and 
known to harbor an alteration that makes them eligible, archival tissue (if available) will be 
submitted for centralized testing however it is not mandatory.  
 
EZH2 expression will be performed on pre-treatment tumor tissue when available. Increased 
EZH2 expression has been postulated as a mechanism of resistance to PARP inhibitors. Tissue 
for HR mutation analysis (BRCA1/2, PALB2, ATM, BARD1, BRIP1, CDK12, CHEK2, 
FANCA, RAD51, RAD51B, RAD51C, RAD51D, RAD54L, NBN, ARID1A) will be collected.  
Additional tissue collected will be analyzed for EZH2 baseline expression and possibly LOH. 
 
EZH2 expression by IHC will be performed on initial tumor sample and on optional standard of 
care biopsies collected at time of disease progression. EZH2 is enhancer of zeste homolog 2. 
EZH2 is an enzymatic subunit of PRC2 complex which is essential in multiple gene silencing. 
EZH2 is frequently overexpressed or mutated in cancers and is overexpression in esophageal 
cancer. EZH2 is oncogenic and has been recently implicated in resistance to PARP inhibitors. 
PARP inhibition has been shown to increase EZH2 activity and diminish response to PARP 
inhibition. We will therefore assess baseline EZH2 expression in tumor samples prior to 
initiation of therapy and at time of disease progression{Yamaguchi, 2018 #207}. 
 
8.1.2 Standard of Care Biopsy at Progression 
If a standard of care biopsy is performed at progression, a sample will be requested for 
correlative analysis. Consent will be obtained from subjects for this sample. This sample will be 
used to look at reversion mutations of HR genes as mechanisms of resistance and EZH2 
analyses.  This biopsy sample will include both, FFPE and flash frozen sections. 
 
8.2 
Peripheral Blood Samples 
 
8.2.1 Required Whole Blood for Circulating Tumor Cells (CTCs) 
Whole Blood is required for analysis of CTCs prior to C1D1, Day 1 of every other Cycle 
beginning with Cycle 3 and at the time of disease progression or safety visit.  
 
8.2.2 Required Blood Sample for Plasma for ctDNA 
Blood samples for plasma will be drawn prior to treatment C1D1 and at the time of disease 
progression/safety follow up visit. 
 


Clinical Study Protocol 
HCRN ESO17-325 
34 
Version Date: 01SEP2021 
Confidential 
8.2.3 Required Whole Blood Sample for Germline Mutations and ctDNA 
Whole Blood sample for analysis of germline mutations of HR genes from DNA and correlation 
with response to niraparib and eligibility for trial. This sample may also be used for liquid biopsy 
panel if archival tissue sample is insufficient for testing. This sample is required and should be 
collected at screening.  
 
8.3 
Banking Samples for Future Unspecified Cancer Related Research 
Whole blood: Whole blood will be collected prior to treatment on Cycle 1 Day 1.  
 
8.4 
Storage of Biospecimens 
Any specimens remaining (leftover) once protocol described biospecimen-based studies are 
complete will be stored for future unspecified cancer related research. Permission for storage of 
samples will be obtained from subjects during informed consent. 
 
8.5 
Confidentiality of Biospecimens 
Samples that are collected will be identified by a subject’s sequence ID assigned at the time of 
registration to the trial. Any material issued to collaborating researchers will be anonymized and 
only identified by the subject’s study number. 
 
9. 
CRITERIA FOR DISEASE EVALUATION 
The following sections describe the recommended method to track disease response for solid 
tumor trials as per the Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 (see 
Eisenhauer EA et al. New response evaluation criteria in solid tumours: revised RECIST 
guideline (version 1.1). Eur J Can, 2009.45:p.228-247). Refer to the RECIST 1.1 publication for 
complete details on these criteria. 
 
9.1 
Measurable Disease 
Measurable disease is defined as the presence of at least one measurable lesion. Measurable 
lesions are defined as those that can be accurately measured in at least one dimension (longest 
diameter to be recorded) as >20 mm by chest x-ray, as >10 mm with CT scan, or >10 mm with 
calipers by clinical exam. All tumor measurements must be recorded in millimeters (or decimal 
fractions of centimeters). 
 
9.1.1 Malignant Lymph Nodes 
To be considered pathologically enlarged and measurable, a lymph node must be >15 mm in 
short axis when assessed by CT scan (CT scan slice thickness recommended to be no greater 
than 5 mm). At baseline and in follow-up, only the short axis will be measured and followed. 
 
9.2 
Non-measurable Lesions 
All other lesions (or sites of disease), including small lesions (longest diameter <10 mm or 
pathological lymph nodes with ≥ 10 to <15 mm short axis), are considered non-measurable 
disease. Bone lesions, leptomeningeal disease, ascites, pleural/pericardial effusions, lymphangitis 
cutis/pulmonitis, inflammatory breast disease, and abdominal masses (not followed by CT or 
MRI), are considered as non-measurable. 
 


Clinical Study Protocol 
HCRN ESO17-325 
35 
Version Date: 01SEP2021 
Confidential 
NOTE:  Cystic lesions that meet the criteria for radiographically defined simple cysts should not 
be considered as malignant lesions (neither measurable nor non-measurable) since they are, by 
definition, simple cysts. ‘Cystic lesions’ thought to represent cystic metastases can be considered 
as measurable lesions, if they meet the definition of measurability described above. However, if 
non-cystic lesions are present in the same subject, these are preferred for selection as target 
lesions. 
 
9.3 
Target Lesions 
All measurable lesions up to a maximum of 2 lesions per organ and 5 lesions in total, 
representative of all involved organs, should be identified as target lesions and recorded and 
measured at baseline. Target lesions should be selected on the basis of their size (lesions with the 
longest diameter), be representative of all involved organs, but in addition should be those that 
lend themselves to reproducible repeated measurements. It may be the case that, on occasion, the 
largest lesion does not lend itself to reproducible measurement in which circumstance the next 
largest lesion which can be measured reproducibly should be selected. A sum of the diameters 
(longest for non-nodal lesions, short axis for nodal lesions) for all target lesions will be 
calculated and reported as the baseline sum diameters. If lymph nodes are to be included in the 
sum, then only the short axis is added into the sum. The baseline sum diameters will be used as 
reference to further characterize any objective tumor regression in the measurable dimension of 
the disease. 
 
9.4 
Non-target Lesions 
All other lesions (or sites of disease) including any measurable lesions over and above the 5 
target lesions should be identified as non-target lesions and should also be recorded at baseline. 
Measurements of these lesions are not required, but the presence, absence, or in rare cases 
unequivocal progression of each should be noted throughout follow-up. 
 
9.5 
Evaluation of Target Lesions 
NOTE: Also see the international criteria proposed by the Response Evaluation Criteria in Solid 
Tumors (RECIST) Committee, version 1.1 (Eur J Cancer 45;2009:228-247) for special notes on 
the assessment of target lesions.  
 
Complete 
Response (CR) 
Disappearance of all target lesions. Any pathological lymph nodes 
(whether target or non-target) must have reduction in short axis to 
<10 mm.
Partial Response 
(PR)
At least a 30% decrease in the sum of the diameters of target lesions, 
taking as reference the baseline sum diameters
Progressive 
Disease (PD) 
At least a 20% increase in the sum of the diameters of target lesions, 
taking as reference the smallest sum on study (this includes the 
baseline sum if that is the smallest on study). In addition to the 
relative increase of 20%, the sum must also demonstrate an absolute 
increase of at least 5 mm. (Note:  the appearance of one or more new 
lesions is also considered progressions).
Stable Disease 
(SD) 
Neither sufficient shrinkage to qualify for PR nor sufficient increase 
to qualify for PD, taking as reference the smallest sum diameters 
while on study
 


Clinical Study Protocol 
HCRN ESO17-325 
36 
Version Date: 01SEP2021 
Confidential 
9.6 
Evaluation of Non-Target Lesions 
 
Complete Response (CR) 
Disappearance of all non-target lesions and normalization 
of tumor marker level. All lymph nodes must be non-
pathological in size (<10 mm short axis) 
 
Note:  If tumor markers are initially above the upper 
normal limit, they must normalize for a subject to be 
considered in complete clinical response.
Non-CR/ Non-PD 
Persistence of one or more non-target lesion(s) and/or 
maintenance of tumor marker level above the normal 
limits
Progressive Disease (PD) 
Appearance of one or more new lesions and/or 
unequivocal progression of existing non-target lesions. 
Unequivocal progression should not normally trump target 
lesion status. It must be representative of overall disease 
status change, not a single lesion increase.
 
Although a clear progression of “non-target” lesions only is exceptional, the opinion of the site 
investigator should prevail in such circumstances, and the progression status should be 
confirmed at a later time by the sponsor investigator. 
 
9.7 
Evaluation of Best Overall Response 
 
Target Lesions 
Non-Target Lesions 
New Lesions
Overall 
Response 
CR
CR
No
CR
CR
Non-CR/ Non-PD
No
PR
CR
Not evaluated
No
PR
PR 
Non-PD/ or not all 
evaluated
No 
PR 
SD
Non-PD or not all evaluated
No
SD
Not all evaluated
Non-PD
No
Non-evaluable
PD
Any
Yes or No
PD
Any
PD*
Yes or No
PD
Any
Any
Yes
PD
*In exceptional circumstances, unequivocal progression in non-target lesions may be 
accepted as disease progression.
 
Subjects with a global deterioration of health status requiring discontinuation of treatment 
without objective evidence of disease progression at that time should be classified as having 
“symptomatic deterioration.” Every effort should be made to document the objective progression 
even after discontinuation of treatment. 
 
In some circumstances, it may be difficult to distinguish residual disease from normal tissue. 
When the evaluation of complete response depends on this determination, it is recommended that 
the residual lesion be investigated (fine needle aspirate/biopsy) to confirm the complete response 
status. 


Clinical Study Protocol 
HCRN ESO17-325 
37 
Version Date: 01SEP2021 
Confidential 
9.8 
Definitions for Response Evaluation – RECIST 1.1 
 
9.8.1 First Documentation of Response 
The time between initiation of therapy and first documentation of PR or CR. 
 
9.8.2 Confirmation of Response 
To be assigned a status of complete or partial response, changes in tumor measurements must be 
confirmed by repeat assessments performed no less than four weeks after the criteria for response 
are first met. 
 
9.8.3 Objective Response Rate  
The objective response rate is the proportion of all subjects with confirmed PR or CR according 
to RECIST 1.1, from the start of treatment until disease progression/recurrence (taking as 
reference for progressive disease the smallest measurements recorded since the start of 
treatment). 
 
9.8.4 
Disease Control Rate 
The disease control rate is the proportion of all subjects with stable disease (SD) for 8 weeks, or 
partial response (PR), or complete response (CR) according to RECIST 1.1, from the start of 
treatment until disease progression/recurrence (taking as reference for progressive disease the 
smallest measurements recorded since the start of treatment). 
 
9.8.5 Progression Free Survival 
A measurement from the date of D1 of treatment until the criteria for disease progression is met 
as defined by RECIST 1.1 or death occurs. Subjects who have not progressed will be right-
censored at the date of the last disease evaluation. 
 
10 
DRUG INFORMATION 
Please refer to the current version of the Investigator’s Brochure (IB) for additional information 
regarding this drug. 
 
10.1 
Niraparib 
Niraparib ([3S]-3-[4-{7-(aminocarbonyl)-2H-indazol-2-yl}phenyl]piperidine[tosylate 
monohydrate salt]) is an orally available, potent, highly selective poly (adenosine diphosphate 
[ADP]-ribose) polymerase (PARP) -1 and -2 inhibitor. Niraparib is also known as ZEJULA. 
 
10.1.1 Storage and Stability 
Niraparib is supplied by GSK in high-density polyethylene (HDPE) bottles with child-resistant 
plastic closures. The study treatment will be open-label and will not be participant-specific. 
 
All study treatment supplies must be stored in accordance with the manufacturer’s instructions 
and package labeling. Until dispensed to the participants, the study treatment will be stored in a 
securely locked area, accessible to authorized personnel only. 
 
10.1.2 Handling and Disposal 
Niraparib should be destroyed at the investigational site if permitted by local regulations. 


Clinical Study Protocol 
HCRN ESO17-325 
38 
Version Date: 01SEP2021 
Confidential 
 
10.1.3 Dispensing and Accountability 
GSK will supply niraparib at no charge to subjects participating in this clinical trial.  
 
The investigator agrees that study drug(s) will be dispensed by the investigator or sub-
investigator(s) named on the Investigator Agreement or their qualified designees.  The 
investigator, sub-investigators, or qualified designees also agree that the study drug(s) will be 
dispensed only to study subjects who have provided written informed consent and have met all 
entry criteria and in accordance with the instructions provided in the storage and handling 
manual. 
 
The investigator is responsible for maintaining accurate dispensing records of the study treatment 
throughout the clinical study. The study treatment accountability log includes information 
including a patient identifier, amount and date dispensed, and amount and date returned to the 
pharmacy, if applicable. Product returned to the pharmacy will be stored under the same 
conditions as products not yet dispensed but will be marked as 'returned' and kept separate from 
the products not yet dispensed. 
 
All dispensing and accountability records should be stored in accordance to the institution 
regulations. The pharmacist will dispense study treatment for each participant according to the 
protocol and storage and handling manual, if applicable. 
 
10.1.4 Adverse Events 
The following adverse reactions (all CTCAE grades) have been reported in ≥20% of patients 
who received niraparib: anemia, thrombocytopenia, nausea, constipation, vomiting, fatigue, 
platelet count decreased, decreased appetite, headache, and insomnia. The median exposure to 
niraparib in these patients was 250 days. 
 
The following adverse reactions and laboratory abnormalities have been identified in ≥ 10 to < 
20% of the 367 patients receiving niraparib: neutropenia, palpitations, asthenia, neutrophil count 
decreased, dizziness, dysgeusia, dyspnea, cough and hypertension. The following adverse 
reactions and laboratory abnormalities have been identified in ≥ 1 to < 10% of the 367 patients 
receiving niraparib: tachycardia, dry mouth, mucosal inflammation, white blood cell count 
decreased, aspartate aminotransferase increased, alanine aminotransferase increased and 
photosensitivity reaction. 
 
11 
ADVERSE EVENTS 
The descriptions and grading scales found in the NCI CTCAE v5 will be utilized for AE 
assessment. A copy of the CTCAE v5 can be downloaded from the CTEP website at 
http://ctep.cancer.gov 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
39 
Version Date: 01SEP2021 
Confidential 
11.1 
Definitions 
 
11.1.1 Adverse Event (AE) 
An AE is any untoward medical occurrence whether or not considered related to the study drug 
that appears to change in intensity during the course of the study. The following are examples of 
AEs:  
 Unintended or unfavorable sign or symptom 
 A disease temporally associated with participation in the protocol 
 An intercurrent illness or injury that impairs the well-being of the subject 
 
Abnormal laboratory values or diagnostic test results constitute AEs only if they induce clinical 
signs or symptoms or require treatment or further diagnostic tests   
 
Hospitalization for elective surgery or routine clinical procedures that are not the result of an AE 
(e.g., surgical insertion of central line) should not be recorded as an AE.  
 
Disease progression should not be recorded as an AE, unless it is attributable to the study 
regimen by the site investigator. 
 
Signs, symptoms, or the clinical sequelae of a suspected overdose of either study intervention or 
a concomitant medication. Overdose per se will not be reported as an AE/SAE unless it is an 
intentional overdose taken with possible suicidal/self-harming intent. Such overdoses should be 
reported regardless of sequelae. 
 
11.1.2 Serious Adverse Event (SAE) 
A SAE is an adverse event that: 
 Results in death.  
 Is life-threatening (defined as an event in which the subject was at risk of death at the 
time of the event; it does not refer to an event which hypothetically might have caused 
death if it were more severe) 
 Requires inpatient hospitalization for >24 hours or prolongation of existing 
hospitalization. NOTE: Hospitalization for anticipated or protocol specified procedures 
such as administration of chemotherapy, central line insertion, metastasis interventional 
therapy, resection of primary tumor, or elective surgery, will not be considered serious 
adverse events. 
 Results in persistent or significant disability/incapacity 
 Is a congenital anomaly or birth defect 
 Is an important medical event (defined as a medical event(s) that may not be immediately 
life-threatening or result in death or hospitalization but, based upon appropriate medical 
and scientific judgment, may jeopardize the subject or may require intervention (e.g., 
medical, surgical) to prevent one of the other serious outcomes listed in the definition 
above). Examples of such events include, but are not limited to, intensive treatment in an 
emergency room or at home for allergic bronchospasm; blood dyscrasias or convulsions 
not resulting in hospitalization; or the development of drug dependency or drug abuse. 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
40 
Version Date: 01SEP2021 
Confidential 
11.1.3 Adverse Events of Special Interest (AESI) 
Selected non-serious AEs and SAEs are also known as Adverse Events of Special Interest. Any 
AE (serious or non-serious) that is of scientific and medical concern specific to the study 
treatment, for which ongoing monitoring and rapid communication by the site investigator to the 
sponsor-investigator and GSK is required.  
 
Adverse Events of Special Interest (AESI) for niraparib are the following:  
 Myelodysplastic Syndromes (MDS) and Acute Myeloid Leukemia (AML) 
 Secondary cancers (new malignancies [other than MDS or AML]) 
 Pneumonitis 
 Embryo-fetal toxicity 
 
AESI should be collected and reported as follows: 
 MDS and AML along with other secondary cancers should be reported to the sponsor-
investigator and GSK for any patient who has received niraparib (regardless of the 
timeframe since the last dose).  
 Embryo-fetal toxicity should be reported as outlined in the Pregnancy reporting section. 
 
11.1.4 Suspected Unexpected Serious Adverse Reactions (SUSARs) 
Per regulatory requirements, if an event is assessed by the sponsor-investigator as a Serious 
Unexpected Adverse Reaction (SUSAR), it is the responsibility of the sponsor-investigator to 
submit the SUSAR Regulatory Authorities according to applicable regulations. In addition, the 
SUSAR will be distributed to the Investigators/sites, utilizing a Council for International 
Organizations of Medical Sciences (CIOMS) report form, or the MedWatch 3500A form). The 
Investigator/site will submit a copy of the report to their respective Institutional Review Board 
(IRB) or Independent Ethics Committee (IEC) and GSK per the governing institutional 
requirements and in compliance with local laws and guidelines. HCRN will facilitate reporting of 
SUSARs between sites to sponsor-investigator and GSK. 
  
11.1.5 Pregnancy 
Site investigators must report all pregnancies and the outcomes to the sponsor-investigator and to 
GSK. The sponsor-investigator has the responsibility to monitor the outcome of all pregnancies 
reported during the clinical study. Each pregnancy must be reported by the site investigator to 
HCRN on an Initial Pregnancy Report Form within 24 hours of becoming aware of the 
pregnancy. HCRN will then report to GSK within 24 hours of becoming aware of the 
pregnancy. Pregnancy is not an AE, and therefore does not need to be reported as an AE unless 
there is a suspicion that the study drug may have interfered with the effectiveness of a 
contraceptive medication. The site investigator must follow-up all pregnancies, document the 
course and the outcome, and report this information to HCRN within 24 hours of becoming 
aware who will report to GSK on a Pregnancy Outcome Report Form within 24 hours of 
becoming aware - even if the patient was withdrawn from the study or the study has finished. 
An elective abortion without complications should not be regarded as an AE, however, it should 
be reported as the outcome to the pregnancy on the Pregnancy Outcome Report Form. 
Therapeutic abortions should be reported as a treatment procedure; the reason for the therapeutic 
abortion should be reported on the Pregnancy Outcome Report Form and as an AE. 
Hospitalization for normal delivery of a healthy newborn should not be considered an SAE. 


Clinical Study Protocol 
HCRN ESO17-325 
41 
Version Date: 01SEP2021 
Confidential 
Any SAE that occurs during pregnancy must be recorded on the Pregnancy Outcome Report 
Form, reported as an SAE on the SAE Report Form (e.g., maternal serious complications, 
therapeutic abortion, ectopic pregnancy, stillbirth, neonatal death, congenital anomaly, birth 
defect) and reported to HCRN within 24 hours and HCRN will report to GSK within 24 hours. 
Hospitalization for normal delivery of a healthy newborn should not be considered an SAE. 
 
11.1.6 Unexpected Adverse Event 
For this study, an AE is considered unexpected when it varies in nature, intensity or frequency 
from information provided in the current IB, prescribing information or when it is not included in 
the informed consent document as a potential risk. Unexpected also refers to AEs that are 
mentioned in the IB as occurring with a class of drugs or are anticipated from the 
pharmacological properties of the drug but are not specifically mentioned as occurring with the 
particular drug under investigation.   
 
11.1.7 Relatedness 
AEs will be categorized according to the likelihood that they are related to the study drug(s). 
Specifically, they will be categorized using the following terms:  
 
Unrelated 
Adverse Event is not related to the study drug(s)  
Unlikely 
Adverse Event is doubtfully related to the study drug(s)  
Possible 
Adverse Event may be related to the study drug(s)  
Probable 
Adverse Event is likely related to the study drug(s)  
Definite 
Adverse Event is clearly related to the study drug(s)  
 
11.2 
Reporting 
 
11.2.1 Adverse Events  
 AEs will be recorded from time of signed informed consent until 30 days after 
discontinuation of study drug(s) or until a new anti-cancer treatment starts, whichever 
occurs first. 
 AEs will be recorded regardless of whether or not they are considered related to the study 
drug(s).   
 All AEs will be recorded in the subject’s medical record and on the appropriate study 
specific eCRF form within the EDC system. 
 Asymptomatic laboratory abnormalities that do not require treatment will not be collected 
as adverse events. 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
42 
Version Date: 01SEP2021 
Confidential 
11.2.2 Serious Adverse Events (SAEs) 
 
11.2.2.1 
Site Requirements for Reporting SAEs to HCRN 
 SAEs will be reported from time of signed informed consent until 30 days after 
discontinuation of study drug(s) or until a new anti-cancer treatment starts, whichever 
occurs first.  
 SAEs considered by the site investigator to be related to study medication and 
unexpected are reported regardless of the timeframe from last dose of study medication. 
 All at least possibly related and unexpected SAEs will be reported on the SAE 
Submission Form within 24 hours of becoming aware of the initial event or follow-up 
information.   
 All SAEs will be recorded in the subject’s medical record and on the appropriate study 
specific eCRF form within the EDC system.   
 All SAEs regardless of relation to study drug will be followed until resolution to baseline 
and/or deemed clinically insignificant and/or until a new anti-cancer treatment starts, 
whichever occurs first. 
 Disease progression is an efficacy criterion and is therefore not considered an AE or SAE 
(even if fatal). Disease progression should be documented but not reported as an SAE. If 
AEs/SAEs occur in relation to disease progression that are not consistent with the natural 
progression of the patient’s disease, these AEs/SAEs must be reported per AE/SAE 
reporting requirements. 
 
The site will submit the completed SAE Submission Form to HCRN within 24 hours of 
becoming aware of the initial event or follow-up information. The form may be submitted to 
HCRN electronically to safety@hoosiercancer.org. The site investigator is responsible for 
informing the IRB and/or other local regulatory bodies as per local requirements.   
 
The original copy of the SAE Submission Form and the email correspondence must be kept 
within the study file at the study site. 
 
Once the SAE has resolved (see resolution guidelines listed above), sites must submit a follow-
up SAE Submission Form within a reasonable timeframe to HCRN electronically to 
safety@hoosiercancer.org.   
 
11.2.2.2 
HCRN Requirements for Reporting SAEs to GSK  
HCRN will report SAEs that are at least possibly related and unexpected to GSK within 24 
hours of receipt of the SAE Submission Form from a site. Follow-up information will be 
provided to GSK as it is received from site.  
 
Email: OAX37649@gsk.com 
Fax: +44(0) 208754 7822 
 
11.2.3 Quarterly AE/SAE Reporting to GSK 
On a quarterly basis HCRN will provide GSK with a line listing of all adverse events (serious 
and non-serious) received during a defined quarter. The line listing will include a sequence 


Clinical Study Protocol 
HCRN ESO17-325 
43 
Version Date: 01SEP2021 
Confidential 
number, the AE term, onset date, outcome, causality assessment, and study drug dosing 
information.    
 
11.2.4 Reporting Product Complaints for Niraparib 
Any written, electronic or oral communication that alleges dissatisfaction related to 
manufactured clinical drug product with regards to its manufacturing, testing, labeling, 
packaging, or shipping, must be reported by the site to HCRN and HCRN will report to GSK via 
email: gsk-rd.complaints@gsk.com within 1 working day of first becoming aware of the 
possible defect. The product and packaging components in question, if available, must be stored 
in a secure area under specified storage conditions until it is determined whether the product is 
required to be returned for investigation of the defect. If the product complaint is associated with 
an SAE, the SAE must be reported separately in accordance with the protocol, and the SAE 
report should mention the product quality complaint. 
 
11.3 
Sponsor-Investigator Responsibilities  
HCRN will send a SAE summary to the sponsor-investigator within 1 business day of receipt of 
SAE Submission Form from a site. The sponsor-investigator will promptly review the SAE 
summary and assess for expectedness and relatedness.   
 
11.4 
HCRN Responsibilities to FDA 
For protocols exempt from the requirements of an IND, HCRN will continue to facilitate 
compliance of applicable requirements for the sponsor-investigator in relation to this study. This 
includes but is not limited to 21 CFR 50.20 informed consent, 21 CFR Part 56 IRB, and pertinent 
sections of the Public Health Service Act and FDAAA. 
 
11.5 
 IND Safety Reports Unrelated to this Trial 
GSK will provide to HCRN IND safety reports from external studies that involve the study 
drug(s) per their guidelines.  HCRN will forward safety reports to the sponsor-investigator who 
will review these reports and determine if revisions are needed to the protocol or consent. HCRN 
will forward these reports to participating sites within 1 business day of receiving the sponsor-
investigator’s review.  Based on the sponsor-investigator’s review, applicable changes will be 
made to the protocol and informed consent document (if required).  All IND safety reports will 
also be made available to sites via the EDC system. Upon receipt from HCRN, site investigators 
(or designees) are responsible for submitting these safety reports to their respective IRBs, as per 
their IRB policies. 
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
44 
Version Date: 01SEP2021 
Confidential 
12 
STATISTICAL METHODS 
Statistical analysis of this study will be the responsibility of the Department of Biostatistics at 
Indiana University School of Medicine. Parameter estimates and relevant summary statistics will 
be reported for both efficacy and safety outcomes. Continuous variables will be summarized by 
means, medians, minima, maxima, and standard deviations. Categorical variables will be 
summarized by frequencies and percentages. Missing data will not be imputed. Additional 
exploratory analysis will be conducted when appropriate. Changes from the analysis plan will 
not require an amendment to the protocol unless it changes a significant feature in the protocol; 
however all changes from the original analysis plan will be documented in the final study report. 
The statistical analysis methods are outline below. 
 
12.1 
Study Design 
This is a single arm two-stage Phase II Study Evaluating safety and efficacy of niraparib in 
patients with previously treated homologous recombination (HR) defective or loss of 
heterozygosity (LOH) high metastatic esophageal/gastroesophageal junction/proximal gastric 
adenocarcinoma. 
 
12.2 
Endpoints 
 
12.2.1 Definition of Primary Endpoint 
 Overall Response rate (ORR) is defined as CR plus PR by RECIST 1.1. 
 
12.2.2 Definition of Secondary Endpoints 
 Toxicities will be defined by the NCI Common Terminology Criteria for Adverse Events 
(NCI CTCAE) v5. 
 PFS is defined as the time from D1 of treatment until the criteria for disease progression 
is met as defined by RECIST 1.1 or death as a result of any cause whichever comes 
earlier. 
 Disease Control rate (DCR) per RECIST is defined as stable disease (SD) for 8 weeks, or 
partial response (PR), or complete response (CR) according to RECIST 1.1 from the start 
of treatment to disease progression/recurrence. 
 
12.3 
Sample Size and Accrual 
This is a standard Simon two-stage design. The null hypothesis is that the ORR is 10% and the 
alternative hypothesis is that the ORR is 25%. The Type I (alpha) error is 5% and power is 80%. 
The power stated is for testing the alternative vs null hypothesis at Stage 2 given the two-stage 
design.  In stage I, 18 patients will be treated, and if 2 or fewer responses are observed, the trial 
will be stopped early for futility. After patient 18 is accrued, enrollment will be halted for this 
analysis. The analysis at Stage 1 is for futility, and there is no decision made to reject the null 
hypothesis at Stage 1. If the trial goes on to stage II, an additional 25 patients will be enrolled. If 
the total number responding is 7 or less by the end of stage II, the drug will not be considered 
worthy of further study in this patient population.  Accrual is expected to be 1-2 patients per 
month. There will be no replacements for patients that are not evaluable for ORR or are not 
compliant with therapy. They will be treated as non-responders if they are not evaluable for 
ORR. 
 


Clinical Study Protocol 
HCRN ESO17-325 
45 
Version Date: 01SEP2021 
Confidential 
12.4 
Analysis Datasets 
 
Population
Definition
Enrolled 
This will comprise all subjects who meet the 
eligibility criteria and are registered onto the study. 
Evaluable 
This will comprise all subjects who receive at least 
one dose of trial drug and either undergo at least 
one post-baseline assessment or die before any 
evaluation. 
 
Safety 
This will comprise all subjects that have received 
one dose of study drug.
 
 
12.5 
Data Analysis Plans 
 
12.5.1 Analysis Plans for Primary Objective 
For the Phase II study, the primary endpoint of objective response rate (per RECIST) in the 
evaluable population will be summarized with the point estimate and corresponding exact 95% 
confidence interval. An exact binomial test will be used to test the null vs alternative hypothesis. 
 
12.5.2 Analysis Plans for Secondary Objectives 
Toxicity will be described for the safety population with frequency tables. Progression free 
survival will be estimated in the evaluable population using standard Kaplan-Meier curve. The 
median PFS will be estimated along with the corresponding 95% confidence interval. DCR will 
be analyzed similarly to the primary endpoint.   
 
12.5.3 Analysis Plans for Exploratory Objectives 
LOH, mRNA expression and alterations/mutations of HR genes in tumor sample, and HR gene 
expression/alterations in circulating tumor cell derived xenografts will be described with means, 
median, standard deviation, minimum and maximum. The correlation of ORR and DCR with 
correlative variables will be analyzed using a two-sample t-test or Wilcoxon rank sum test. Cox 
regression will be used for PFS.  
 
13 
TRIAL MANAGEMENT 
 
13.1 
Data and Safety Monitoring Plan (DSMP) 
The study will be conducted in accordance with the Indiana University Melvin and Bren Simon 
Cancer Center’s (IUSCC) DSMP for Moderate Risk Trials. 
 
HCRN facilitated oversight activities for Moderate Risk Trials include: 
 Review and processing of all adverse events requiring expedited reporting as defined in the 
protocol 
 Provide trial accrual progress, safety information and data summary reports to the sponsor-
investigator.  


Clinical Study Protocol 
HCRN ESO17-325 
46 
Version Date: 01SEP2021 
Confidential 
 Investigators will conduct continuous review of data and patient safety. For any increase in 
frequency of grade 3 or above adverse events (above the rate reported in the Investigator 
Brochure), the sponsor investigator will notify HCRN who will notify the DSMC Chair and 
Compliance Officer immediately. The notification will include the incidence of study 
adverse events, grades, and attributions, as well as investigator statements regarding 
comparison with risks per the IB/package insert. 
 Notify participating sites of adverse events potentially requiring expedited reporting and 
subsequent DSMC recommendations for study modifications. 
 Coordinate monthly meetings which will include representation from each accruing site. 
o These meetings should include review of data, the number of subjects and 
significant toxicities as described in the protocol. HCRN should maintain meeting 
minutes and attendance for submission to the DSMC upon request. 
 Conduct data monitoring across all participating sites in accordance with the monitoring 
requirements set forth in the IUSCC DSMP. 
 
13.2 
IUSCC Data Safety Monitoring Committee Oversight 
The IUSCC Data and Safety Monitoring Committee (DSMC) is responsible for oversight of 
subject safety, regulatory compliance, and data integrity for this trial. The DSMC will review 
this study to assess toxicity, compliance, data integrity, and accrual per the Institutional DSMP. 
Trials managed by HCRN are not routinely audited or monitored by IUSCC; however, the 
IUSCC DSMC retains the right to audit HCRN trials on a for cause basis. 
 
The IUSCC DSMC will review study data annually during the active treatment and safety 
follow-up portion of the trial, per the IUSCC DSMP.  
 
In preparation for the IUSCC DSMC review, HCRN will provide the following: 
 Monthly Summary Reports 
 Reports of the following, if not already included in the Monthly Summary Report: 
o Adverse event summary report (including serious adverse events) 
o Study accrual patterns 
o Protocol deviations 
 Audit and/or monitoring results, if applicable 
 Data related to stopping/ dose decision rules described in study design 
 HCRN monthly study meeting minutes/ attendance 
 
Documentation of DSMC reviews will be provided to sponsor-investigator and HCRN. The 
IUSCC DSMC will notify the sponsor-investigator and other regulatory bodies, as appropriate, 
for issues of immediate concern. The sponsor-investigator will work with HCRN to address the 
DSMC’s concerns as appropriate. 
 
At any time during the conduct of the trial, if it is the opinion of the sponsor-investigator that 
the risks (or benefits) to the patient warrant early closure of the study, this recommendation 
should be made in writing to the DSMC Chair and Compliance Officer. Alternatively, the 
DSMC may initiate suspension or early closure of the study at any time based on its review of 
the study reports. 
 


Clinical Study Protocol 
HCRN ESO17-325 
47 
Version Date: 01SEP2021 
Confidential 
13.3 
Data Quality Oversight Activities 
Remote validation of the EDC system data will be completed on a continual basis throughout the 
life cycle of the study. Automated edit check listings will be used to generate queries in the EDC 
system and will be transmitted to the site to address in a timely fashion. Corrections will be made 
by the study site personnel.  
 
Participating sites may also be subject to quality assurance audits by GSK or its designee as well 
as inspection by appropriate regulatory agencies. 
 
13.3.1 Onsite Monitoring 
Monitoring visits to the trial sites will be made periodically during the trial, to ensure key aspects 
of the protocol are followed. For cause visits may occur as necessary. Selected source documents 
will be reviewed for verification of agreement with data entered into the EDC system. It is 
important for the site investigator and their relevant personnel to be available for a sufficient 
amount of time during the monitoring visits or audit, if applicable. The site investigator and 
institution guarantee access to source documents by HCRN or its designee. 
 
The trial site may also be subject to quality assurance audit by GSK or its designee as well as 
inspection by appropriate regulatory agencies. 
 
13.4 
Compliance with Trial Registration and Results Posting Requirements 
Under the terms of the Food and Drug Administration Modernization Act (FDAMA) and the 
Food and Drug Administration Amendments Act (FDAAA), the sponsor-investigator of the trial 
is solely responsible for determining whether the trial and its results are subject to the 
requirements for submission to the Clinical Trials Data Bank, http://www.clinicaltrials.gov. All 
results of primary and secondary objectives must be posted to CT.gov within a year of 
completion. The sponsor-investigator has delegated responsibility to HCRN for registering the 
trial and posting the results on clinicaltrials.gov. Information posted will allow subjects to 
identify potentially appropriate trials for their disease conditions and pursue participation by 
calling a central contact number for further information on appropriate trial locations and study 
site contact information.   
 
14. 
DATA HANDLING AND RECORD KEEPING 
 
14.1 
Data Management 
HCRN will serve as the Clinical Research Organization for this trial. Data will be collected 
through a web based clinical research platform (EDC system), a system compliant with Good 
Clinical Practices and Federal Rules and Regulations. HCRN personnel will coordinate and 
manage data for quality control assurance and integrity. Select data will be collected and entered 
into the EDC system  by study site personnel from participating institutions.   
 
14.2 
Case Report Forms and Submission 
Generally, clinical data will be electronically captured in the EDC system and correlative results 
will be captured in EDC system or other secure database(s). If procedures on the study calendar 
are performed for standard of care, at minimum, that data will be captured in the source 


Clinical Study Protocol 
HCRN ESO17-325 
48 
Version Date: 01SEP2021 
Confidential 
document. Select standard of care data will also be captured in the EDC system, according to 
study-specific objectives.  
 
The completed dataset is the sole property of the sponsor-investigator’s institution and should 
not be exported to third parties, except for authorized representatives of appropriate 
Health/Regulatory Authorities, without permission from the sponsor-investigator and HCRN. 
 
14.3 
Record Retention 
To enable evaluations and/or audits from Health Authorities/HCRN, the site investigator agrees 
to keep records, including the identity of all subjects (sufficient information to link records; e.g., 
hospital records), all original signed informed consent forms, copies of all source documents, and 
detailed records of drug disposition. All source documents are to remain in the subject’s file and 
retained by the site investigator in compliance with the site contract with HCRN. No records will 
be destroyed until HCRN confirms destruction is permitted. 
 
14.4 
Confidentiality 
There is a slight risk of loss of confidentiality of subject information. All records identifying the 
subjects will be kept confidential and, to the extent permitted by the applicable laws and/or 
regulations, will not be made publicly available. Information collected will be maintained on 
secure, password protected electronic systems. Paper files that contain personal information will 
be kept in locked and secure locations only accessible to the study site personnel.  
 
Subjects will be informed in writing that some organizations including the sponsor-investigator 
and his/her research associates, HCRN, GSK, IRB, or government agencies, like the FDA, may 
inspect their medical records to verify the information collected, and that all personal 
information made available for inspection will be handled in strictest confidence and in 
accordance with local data protection laws. 
 
If the results of the study are published, the subject’s identity will remain confidential. 
 
15 
ETHICS 
 
15.1 
Institutional Review Board (IRB) Approval 
The final study protocol and the final version of the informed consent form must be approved in 
writing by an IRB. The site investigator must submit written approval by the IRB to HCRN 
before he or she can enroll subjects into the study.   
 
The site investigator is responsible for informing the IRB of any amendment to the protocol in 
accordance with local requirements. In addition, the IRB must approve all advertising used to 
recruit subjects for the study. The protocol must be re-approved by the IRB, as local regulations 
require.  
 
Progress reports and notifications of serious and unexpected adverse events will be provided to 
the IRB according to local regulations and guidelines. 
 


Clinical Study Protocol 
HCRN ESO17-325 
49 
Version Date: 01SEP2021 
Confidential 
15.2 
Ethical Conduct of the Study 
The study will be performed in accordance with ethical principles originating from the 
Declaration of Helsinki.  Conduct of the study will be in compliance with ICH Good Clinical 
Practice, and with all applicable federal (including 21 CFR parts 56 & 50), state, or local laws. 
 
15.3 
Informed Consent Process 
The site investigator will ensure the subject is given full and adequate oral and written 
information about the nature, purpose, possible risks and benefits of the study. Subjects must 
also be notified they are free to discontinue from the study at any time. The subject should be 
given the opportunity to ask questions and allowed time to consider the information provided. 
 
The subject’s signed and dated informed consent must be obtained before conducting any 
procedure specifically for the study. The site investigator must store the original, signed 
informed consent form. A copy of the signed informed consent form must be given to the 
subject.  
 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
50 
Version Date: 01SEP2021 
Confidential 
16 REFERENCES 
 
1. Siegel, R.L., K.D. Miller, and A. Jemal, Cancer Statistics, 2017. CA Cancer J Clin, 2017. 
67(1): p. 7-30. 
2. Pohl, H., et al., Risk factors in the development of esophageal adenocarcinoma. Am J 
Gastroenterol, 2013. 108(2): p. 200-7. 
3. Cunningham, D., et al., Capecitabine and oxaliplatin for advanced esophagogastric cancer. 
N Engl J Med, 2008. 358(1): p. 36-46. 
4. Enzinger, P., et al., CALGB 80403 (Alliance)/E1206: A Randomized Phase II Study of Three 
Chemotherapy Regimens Plus Cetuximab in Metastatic Esophageal and Gastroesophageal 
Junction Cancers. J Clin Oncol. 2016 Aug 10;34(23):2736-42.  
5. Ford, H., et al., Docetaxel and its potential in the treatment of refractory esophagogastric 
adenocarcinoma Therap Adv Gastroenterol. 2015 Jul; 8(4): 189–205. 
6. Fuchs, C. et al., Ramucirumab monotherapy for previously treated advanced gastric or 
gastro-oesophageal junction adenocarcinoma (REGARD): an international, randomised, 
multicentre, placebo-controlled, phase 3 trial. Lancet. 2014 Jan 4;383(9911):31-39.  
7. Wilke, H., et al., Ramucirumab plus paclitaxel versus placebo plus paclitaxel in patients with 
previously treated advanced gastric or gastro-oesophageal junction adenocarcinoma 
(RAINBOW): a double-blind, randomised phase 3 trial. Lancet Oncol. 2014 
Oct;15(11):1224-35 
8. Bang, Y., et al., Trastuzumab in combination with chemotherapy versus chemotherapy alone 
for treatment of HER2-positive advanced gastric or gastro-oesophageal junction cancer 
(ToGA): a phase 3, open-label, randomised controlled trial. Lancet. 2010 Aug 
28;376(9742):687-97 
9. Appelman, H., et al., Barrett's esophagus: natural history. Annals of The New York 
Academy of Sciences. 2011 Sep; 1232(1): 292-308.  
10. Inayama, M., et al., Involvement of oxidative stress in experimentally induced reflux 
esophagitis and esophageal cancer Hepato-gastroenterology [01 Apr 2007, 54(75):761-765]. 
11. Dvorak K., Bile acids in combination with low pH induce oxidative stress and oxidative DNA 
damage: relevance to the pathogenesis of Barrett's oesophagus. Gut. 2007 Jun;56(6):763-71.  
12. Jenkins GJ, D’Souza FR, Suzen SH, et al. Deoxycholic acid at neutral and acid pH, is 
genotoxic to oesophageal cells through the induction of ROS: the potential role of anti-
oxidants in Barrett’s oesophagus. Carcinogenesis. 2007;28:136–42.  
13. Zhang, H., Esophageal Adenocarcinoma Arising in Barrett Esophagus. Cancer Lett. 2009 
Mar 18; 275(2): 170–177. 
14. DeWalt, R., Gastroesophageal junction adenocarcinoma displays abnormalities in 
homologous recombination and nucleotide excision repair.Lung Cancer: Targets and 
Therapy:15 February 2014 Volume 2014:5 Pages 11-20 
15. Shammas M., Genomic evolution in Barrett’s adenocarcinoma cells: critical roles of 
elevated hsRAD51, homologous recombination and Alu sequences in the genome Oncogene. 
2011 August 18; 30(33): 3585–3598. 
 
 


Clinical Study Protocol 
HCRN ESO17-325 
51 
Version Date: 01SEP2021 
Confidential 
16. Cerbinskaite A., et al., Defective homologous recombination in human cancers. Cancer Treat 
Rev. 2011;38:89–100.  
17 Rigakos, G., BRCAness: finding the Achilles heel in ovarian cancer. Oncologist. 
2012;17(7):956-62. 
18. Fong, P.C., et al., Inhibition of poly(ADP-ribose) polymerase in tumors from BRCA 
mutation carriers. N Engl J Med, 2009. 361(2): p. 123-34. 
19. Mateo, J., et al., DNA-Repair Defects and Olaparib in Metastatic Prostate Cancer. N Engl J 
Med, 2015. 373(18): p. 1697-708. 
20. Ganguly, B., Role of Biomarkers in the Development of PARP Inhibitors. Biomark Cancer. 
2016; 8(Suppl 1): 15–25. 
21. De Lorenzo, S.B., et al., The Elephant and the Blind Men: Making Sense of PARP Inhibitors 
in Homologous Recombination Deficient Tumor Cells. Front Oncol, 2013. 3: p. 228. 
22. Jones, P., et al., Niraparib: A Poly(ADP-ribose) Polymerase (PARP) Inhibitor for the 
Treatment of Tumors with Defective Homologous Recombination. J Med Chem, 2015. 58(8): 
p. 3302-14. 
23. Gelmon, K.A., et al., Olaparib in patients with recurrent high-grade serous or poorly 
differentiated ovarian carcinoma or triple-negative breast cancer: a phase 2, multicentre, 
open-label, non-randomised study. Lancet Oncol, 2011. 12(9): p. 852-61. 
24. Turner, N., A. Tutt, and A. Ashworth, Hallmarks of 'BRCAness' in sporadic cancers. Nat 
Rev Cancer, 2004. 4(10): p. 814-9. 
25. Cancer Genome Atlas Research, N., Integrated genomic analyses of ovarian carcinoma. 
Nature, 2011. 474(7353): p. 609-15. 
26. Timms, K.M., et al., Association of BRCA1/2 defects with genomic scores predictive of DNA 
damage repair deficiency among breast cancer subtypes. Breast Cancer Res, 2014. 16(6): p. 
475. 
27. Sahasrabudhe R., Germline Mutations in PALB2, BRCA1, and RAD51C, Which Regulate 
DNA Recombination Repair, in Patients With Gastric Cancer. Gastroenterology. 2017 
Apr;152(5):983-986 
28. Turner, N.C. and A. Ashworth, Biomarkers of PARP inhibitor sensitivity. Breast Cancer Res 
Treat, 2011. 127(1): p. 283-6. 
29. Kummar, S., et al., A Phase I study of veliparib in combination with metronomic 
cyclophosphamide in adults with refractory solid tumors and lymphomas. Clin Cancer Res, 
2012. 18(6): p. 1726-34. 
30. Ledermann, J., et al., Olaparib maintenance therapy in platinum-sensitive relapsed ovarian 
cancer. N Engl J Med, 2012. 366(15): p. 1382-92. 
31. Sandhu, S.K., et al., The poly(ADP-ribose) polymerase inhibitor niraparib (MK4827) in 
BRCA mutation carriers and patients with sporadic cancer: a Phase 1 dose-escalation trial. 
Lancet Oncol, 2013. 14(9): p. 882-92. 
32. Tutt, A., et al., Oral poly(ADP-ribose) polymerase inhibitor olaparib in patients with BRCA1 
or BRCA2 mutations and advanced breast cancer: a proof-of-concept trial. Lancet, 2010. 
376(9737): p. 235-44. 
33. Mirza, M.R., et al., Niraparib maintenance therapy in platinum-sensitive, recurrent ovarian 
cancer. N Engl J Med, 2016. 375(22): p. 2154-2164. 
34. Pujade-Lauraine E., et al., Treatment with olaparib monotherapy in the maintenance setting 
significantly improves progression-free survival in patients with platinum-sensitive relapsed 
ovarian cancer: Results from the phase III SOLO2 study. 48th Annual Meeting for the 


Clinical Study Protocol 
HCRN ESO17-325 
52 
Version Date: 01SEP2021 
Confidential 
Society of Gynecologic Onocolgy. March 12-15, 2017. National Harbor, Maryland. 
Abstract# LBA-2. 
35. Robson, M., et al., Olaparib for Metastatic Breast Cancer in Patients with a Germline BRCA 
Mutation. N Engl J Med, 2017. 
36. Bryant, H.E., et al., Specific killing of BRCA2-deficient tumours with inhibitors of poly(ADP-
ribose) polymerase. Nature, 2005. 434(7035): p. 913-7. 
37. McCabe, N., et al., Deficiency in the repair of DNA damage by homologous recombination 
and sensitivity to poly(ADP-ribose) polymerase inhibition. Cancer Res, 2006. 66(16): p. 
8109-15. 
38. Gavande N., et al., DNA repair targeted therapy: The past or future of cancer treatment? 
Pharmacol Ther. 2016 Apr;160:65-83. 
39. Bang, Y., et al., Olaparib in combination with paclitaxel in patients with advanced gastric 
cancer who have progressed following first-line therapy (GOLD): a double-blind, 
randomised, placebo-controlled, phase 3 trial. Lancet Oncol. 2017 Dec;18(12):1637-1651. 
40. Boddy, M., et al., Mus81-Eme1 are essential components of a Holliday junction resolvase. 
Cell 2001; 107, 537-548