Veliparib (ABT-888), an Oral PARP Inhibitor, and VX-970, an ATR Inhibitor, in Combination With Cisplatin in People With Refractory Solid Tumors

Study Overview
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Brief Summary
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Background: The drug cisplatin treats certain cancers when given with other chemotherapy drugs. Researchers think combining cisplatin with 2 other drugs could block proteins that support cancer cell growth. The other drugs are ABT-888 (veliparib) and M6620 (VX-970). They want to test if this drug combination slows the growth of cancer and is safe. Objectives: To test the safety and tolerability of VX-970 and veliparib combined with cisplatin in people with advanced refractory solid tumors. To determine the maximum tolerated dose of these drugs. Eligibility: People ages 18 and older with: Solid tumors that have progressed after treatment or for which no treatment exists Normal organ and marrow function Design: Participants will be screened with: Medical history Physical exam Computed tomography (CT) scan or magnetic resonance imaging (MRI) Blood and urine tests Participants will get the study drugs in 3-week cycles: Cisplatin in a vein on 1 or 2 days VX-970 in a vein on 2 days Veliparib by mouth twice a day on 6 days In each cycle, participants will have 5 physical exams and blood tests 5 times. In some cycles, participants will have CT scans or MRIs. In cycle 1, participants may have 2 tumor biopsies. A small piece of tissue is removed by needle. Participants will keep a study diary. They will write when they take the drugs and if they have side effects. Participants will stay in the study as long as they tolerate the drugs and their tumors are not getting worse. Participants will have a phone call about a month after their last dose.

Detailed Description
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Background: Ataxia-telangiectasia-related (ATR) protein kinase is central to the deoxyribonucleic acid (DNA) damage response and homologous recombination, activating a series of phosphorylation cascades, culminating in cell cycle arrest to allow time for deoxyribonucleic acid (DNA) repair. ATR additionally facilitates homologous recombination repair through modulation of the p53-replication protein A (p53-RPA) complex bound to single-stranded deoxyribonucleic acid (ssDNA) during the DNA repair process. Poly (ADP-ribose) polymerase-1 (PARP-1) plays a pivotal role in base-excision repair of single strand breaks formed either due to direct genotoxic stress or during the processing of double strand breaks. PARP also plays a role in alternative end joining, which may contribute to combination activity. PARP-1 binding to sites of DNA damage results in activation of its catalytic activity and generation of chains of poly (ADP-ribosyl)ated polymers, which serve as docking sites for recruitment of DNA repair proteins. Veliparib (ABT-888) is a potent PARP 1/2 inhibitor with clinical evidence of potentiation of antitumor activity in combination with cisplatin in breast cancer gene (BRCA) mutation carriers and patients with sporadic triple-negative breast cancer. M6620 (VX-970) is a potent ATR inhibitor, with half maximal inhibitory concentration (IC(50) of 20 nanomolar and antitumor activity across a broad range of cell lines in combination with DNA damaging agents. Preclinical studies show M6620 (VX-970) synergizes with cisplatin to induce DNA damage and antitumor activity. The addition of PARP inhibitor veliparib with ATR inhibitor M6620 (VX-970) allows for impairment of DNA repair, the induction of a BRCA null phenotype, and potentiation of the antitumor activity of cisplatin. Primary Objective: -To establish the safety, tolerability, and the maximum tolerated dose (MTD) of the combination of M6620 (VX-970) and veliparib in combination with cisplatin in patients with advanced refractory solid tumors Secondary Objectives: To assess the effect of the combination of M6620 (VX-970), veliparib, and cisplatin on markers of DNA damage and apoptosis To assess antitumor activity of the combination Exploratory Objective: -To investigate tumor genomic alterations potentially associated with acquired resistance to the combination of M6620 (VX-970), veliparib, and cisplatin Eligibility: Patients must have histologically confirmed solid tumors for which all standard therapy known to prolong survival has failed in the metastatic setting, or for which standard therapies do not exist Patients must have had no major surgery, radiation, or chemotherapy within 3 weeks prior to entering the study Patients must have adequate organ function Study Design: Initially, M6620 (VX-970) will be administered intravenously on Days 2 and 9 of each 21-day cycle. Veliparib will be administered orally twice a day (every (q)12 hours +/- 1 hour) for Days 1-3 and 8-10 of each 21-day cycle. Cisplatin will be administered at 40 mg/m^2 intravenously on Day 1 (and Day 8 from dose level 3 (DL3) onwards) of each 21-day cycle. As of Amendment I (12/7/2017), patients who have been on study for at least 6 cycles may have cisplatin administration held or discontinued at the discretion of the Principal Investigator (PI), Dr. Chen, in recognition of the cumulative neurotoxicity seen with cisplatin treatment. If cisplatin is not administered during a cycle M6620 (VX-970) will be administered on Days 1 and 8 of that cycle. The escalation portion of the trial will follow a standard 3+3 design, whereby patients will be dose escalated in cohorts of 3 until dose-limiting toxicity is observed Once the maximum tolerated dose (MTD) is established, up to 15 additional patients will be enrolled to an expansion phase at the MTD. Mandatory tumor biopsies will be obtained in the expansion phase to assess pharmacodynamic (PD) endpoints

Official Title
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Phase I Study of Veliparib (ABT-888), an Oral PARP Inhibitor, and VX-970, an ATR Inhibitor in Combination With Cisplatin in Patients With Refractory Solid Tumors

Conditions
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Neoplasms

Intervention / Treatment
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* Drug: Veliparib + VX-970 + Cisplatin


Participation Criteria
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Eligibility Criteria
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INCLUSION CRITERIA: Patients must have histologically confirmed solid tumors for which standard therapy known to prolong survival has failed in the metastatic setting or for which standard therapies do not exist. Tumor amenable to biopsy and willingness to undergo tumor biopsies before and after M6620 (VX-970) treatment during the expansion phase of the trial (biopsies optional during the escalation phase). Patients must have completed any chemotherapy, radiation therapy, surgery, or biologic therapy greater than or equal to 3 weeks (or greater than or equal to 5 half-lives, whichever is shorter) prior to entering the study. Patients must be greater than or equal to 2 weeks since any prior administration of a study drug in an exploratory investigational new drug (IND)/Phase 0 study and greater than or equal to 1 week since any palliative radiation therapy. Patients must have recovered to eligibility levels from prior toxicity or adverse events. Age greater than or equal to 18 years of age. Eastern Cooperative Oncology Group (ECOG) performance status less than or equal to 2. Life expectancy > 3 months. Patients must have normal organ and marrow function as defined below: absolute neutrophil count greater than or equal to 1,500/mcL hemoglobin greater than or equal to 10 g/dL platelets greater than or equal to 100,000/mcL total bilirubin less than or equal to 1.5 X institutional upper limit of normal Aspartate aminotransferase (AST) Serum glutamic oxaloacetic transaminase(SGOT)/alanine aminotransferase (ALT) Serum glutamic pyruvic transaminase (SGPT) less than or equal to 1.5 X institutional upper limit of normal (OR < 3X upper limit of normal (ULN) in the setting of liver metastases) creatinine less than or equal to 1.5X institutional upper limit of normal OR creatinine clearance greater than or equal to 60 mL/min/1.73 m^2 for patients with creatinine levels above institutional normal The effects of M6620 (VX-970) and veliparib on the developing human fetus are unknown. For this reason and because cisplatin is known to be teratogenic, women of childbearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry, for the duration of study participation, and for 6 months after completing study treatment. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately. Men treated or enrolled on this protocol must also agree to use adequate contraception prior to the study, for the duration of study participation, and for 6 months after completion of administration of study agents. Human immunodeficiency virus (HIV)-positive subjects on combination antiretroviral therapy are ineligible because of the potential for pharmacokinetic interactions with M6620 (VX-970). In addition, these subjects are at increased risk of lethal infections when treated with marrow-suppressive therapy. Patients must be able to swallow whole tablets or capsules. Nasogastric or gastric (G)-tube administration is not allowed. Any gastrointestinal disease which would impair ability to swallow, retain, or absorb drug is not allowed. Ability to understand and the willingness to sign a written informed consent document. During the expansion phase of the protocol, patients must have disease amenable to biopsy and be willing to undergo pre- and post-treatment biopsies. Patients must have greater than or equal to 10.0 g/dL hemoglobin (Hb) and no blood transfusion in the past 28 days to receive Veliparib. EXCLUSION CRITERIA: Patients who are receiving any other investigational agents. Patients with known active brain metastases or carcinomatous meningitis are excluded from this clinical trial. Patients whose brain metastatic disease status has remained stable for greater than or equal to 4 weeks following treatment of brain metastases are eligible to participate at the discretion of the principal investigator. Uncontrolled intercurrent illness including, but not limited to, ongoing or active untreated infection, or psychiatric illness/social situations that would limit compliance with study requirements. Patients required to be on any of the concomitant medications are excluded. Pregnant women and women who are breastfeeding are excluded from this study because the effects of the study drugs on the developing fetus are unknown. Patients who have had prior platinum-based therapy who have > Grade 1 neurotoxicity or ototoxicity at the time of enrollment will not be permitted on study. Patients with a seizure history will not be permitted on protocol due to association of veliparib with seizure activity in animal toxicology studies at higher doses. Patients on anticonvulsant medications will not be permitted on study due to the potential to lower plasma levels of anticonvulsants and risk for seizure activity. Patients with treatment-related acute myeloid leukemia (AML) (t-AML)/Myelodysplastic syndromes (MDS), or with features suggestive of AML/MDS, or who have had prior allogeneic bone marrow transplant or double umbilical cord blood transplantation, should not receive Veliparib due to reports of MDS and leukemia secondary to oncology therapy on Cancer Therapy Evaluation Program (CTEP)-sponsored studies utilizing Veliparib. INCLUSION of WOMEN and MINORITIES Both men and women of all races and ethnic groups are eligible for this trial.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: M6620 (VX-970)<br>M6620 will be administered intravenous (IV) on Days 2 and 9 of each 21-day cycle; Veliparib will be administered orally twice a day (BID) Days 1-3 and 8-10 of each cycle; Cisplatin will be administered at 40 mg/m^2 IV Day 1 (and Day 8 from dose level 3 onwards) of each cycle | Drug: Veliparib + VX-970 + Cisplatin<br>* Ataxia-telangiectasia-related (ATR) protein kinase is central to the deoxyribonucleic acid (DNA) damage response and homologous recombination, activating a series of phosphorylation cascades, culminating in cell cycle arrest to allow time for DNA repair. Poly (ADP-ribose) polymerase (PARP) plays a pivotal role in base-excision repair of single strand breaks formed either due to direct genotoxic stress or during the processing of double strand breaks. Preclinical studies show ATR inhibitor M6620 (VX-970) synergizes with cisplatin to induce DNA damage and antitumor activity. The addition of PARP inhibitor veliparib with VX-970 allows for impairment of DNA repair, induction of a breast cancer gene (BRCA) null phenotype, and potentiation of the antitumor activity of cisplatin.<br>* Other names: ABT-888 + M6620 (berzosertib) + Cisplatinum;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants With Worst Grade 2 or Higher Adverse Events Occurring in >5% of Participants at Least Possibly Related to Study Drugs | Adverse events were assessed by the National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE) version 5.0. Grade 2 is moderate, Grade 3 is severe or medically significant but not immediately life threatening, and Grade 4 is life threatening. | Cycle 1 (i.e., one cycle = 21 days) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants With RAD51 Recombinase (Rad51), Phosphorylated Histone H2AX (γH2AX), Phosphorylated at Serine 343 (pS343)-Nibrin (Nbs1), and Phosphorylated KRAB-associated Protein 1 (pKAP-1) Induced After Treatment | Biopsies were collected at Cycle 1 Day 1, and Cycle 1 Day 9 and markers Rad51, γH2AX, pS343-Nbs1, and pKAP-1 were measured for deoxyribonucleic acid (DNA) damage and apoptosis by immunofluorescence assays (IFA). | Cycle 1 Day 1, and Cycle 1 Day 9 (i.e., one cycle = 21 days) | 
| Number of Participants With a Best Response to the Antitumor Activity of Veliparib (ABT-888), an Oral PARP Inhibitor, and VX-970, an ATR Inhibitor, in Combination With Cisplatin | Response was assessed by the Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. Complete Response (CR) is disappearance of all target lesions. Partial Response (PR) is at least a 30% decrease in the sum of the diameters of target lesions. Progressive Disease (PD) is at least a 20% increase in the sum of the diameters of target lesions, and the appearance of one or more new lesions. Stable Disease (SD) is neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD. | 4 cycles (i.e., one cycle = 21 days) | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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BRCA Null, Pharmacodynamic, DNA Damage Repair, Apoptosis, Combination Therapy