Clinical trial NCT04404140: A Study Evaluating The Safety, Efficacy and Pharmacokinetics Of Ipatasertib In Combination With Atezolizumab And Docetaxel In Metastatic Castration-Resistant Prostate Cancer (mCRPC).
Official title: A Phase Ib, Open-Label, Multicenter Study Evaluating The Safety, Efficacy and Pharmacokinetics Of Ipatasertib In Combination With Atezolizumab And Docetaxel In Metastatic Castration-Resistant Prostate Cancer.
Study type: INTERVENTIONAL
Overall status: TERMINATED
Phase: PHASE1
Conditions: Castration-Resistant Prostatic Cancer
Lead sponsor: Hoffmann-La Roche
Sponsor class: INDUSTRY
First posted: 2020-05-27
Enrollment: 6
Sex: MALE
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: A study evaluating the safety, preliminary efficacy and pharmacokinetics of ipatasertib in combination with atezolizumab and docetaxel in participants with mCRPC previously treated with second-generation AR (Androgen Receptor)-targeted therapy. The study consists of two parts: \[1\] Part A: Safety run-in cohort of approximately 12 participants; \[2\] Part B: Expansion cohort of approximately 38 participants. All participants in this study will continue to be treated until progression of disease, loss of clinical benefit, unacceptable toxicity or withdrawal of consent.


Eligibility criteria: Inclusion Criteria:

* Ability to comply with the study protocol.
* Adenocarcinoma of the prostate without small-cell or neuroendocrine features.
* Metastatic disease that cannot be treated with curative intent.
* Surgical or medical castration with testosterone serum level \< 50 ng/dL (1.7 nM).
* For participants treated with luteinizing hormone-releasing hormone analogs, initiation therapy \>= 4 weeks prior to the first dose of study treatment and continued therapy throughout study treatment.
* Progression of Prostate Cancer.
* Receipt of at least one prior line of second generation AR-targeted therapy.
* For participants in Part A of study: measurable visceral disease or measurable extrapelvic adenopathy per RECIST v1.1.
* For participants in Part B of study: either measurable visceral disease or measurable extrapelvic adenopathy by RECIST v1.1 or bone lesions by bone scan, or both.
* Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1.
* Life expectancy of \>= 3 months.
* Ability to swallow oral study drug.
* Adequate organ and bone marrow function.
* Resolved or stabilized toxicities resulting from previous therapy to Grade 1 (except for alopecia and neuropathy).
* For men: agreement to remain abstinent (refrain from heterosexual intercourse) or use contraceptive measures and agreement to refrain from donating sperm.

Exclusion Criteria:

* Prior treatment with an AKT, PI3K, or mTOR inhibitor.
* Prior treatment with radium or other therapeutic radiopharmaceuticals for prostate cancer.
* Prior therapy with an anti-PD-1, anti-PD-L1, anti-PD-L2 agent or with an agent directed to another stimulatory or co-inhibitory T-cell receptor (e.g., CTLA-4, OX-40, CD137).
* Prior treatment with docetaxel or another chemotherapy agent for mCRPC.
* Treatment with investigational therapy within 14 days prior to initiation of study drug.
* History or known presence of central nervous system metastases including leptomeningeal carcinomatosis.
* Uncontrolled tumor-related pain.
* Symptomatic lesions (e.g., bone metastases or metastases causing nerve impingement) amenable to palliative radiotherapy should be treated prior to enrollment.
* Asymptomatic metastatic lesions whose further growth would likely cause functional deficits or intractable pain (e.g., epidural metastasis that is not presently associated with spinal cord compression) should be considered for loco- regional therapy if appropriate prior to enrollment.
* Non-study-related minor surgical procedures =\< 5 days or major (invasive) surgical procedure =\< 28 days prior to the first dose of study treatment.
* Active Hepatitis B and C infection (HBV/HCV).
* Known HIV infection.
* Uncontrolled pleural effusion, pericardial effusion, or ascites.
* Illicit drug or alcohol abuse within 12 months prior to screening, in the investigator's judgment.
* Malabsorption syndrome or other condition that would interfere with enteral absorption.
* Serious infection requiring antibiotics within 14 days prior to the first dose of study treatment.
* Any serious medical condition or abnormality in clinical laboratory tests that, in the investigator's judgment, precludes the participant's safe participation in and completion of the study.
* History of another malignancy within 5 years prior to enrollment.
* History of clinically significant cardiovascular dysfunction.
* Presence of any other condition, metabolic dysfunction, physical examination finding, or laboratory finding that may increase the risk associated with study participation or may interfere with the interpretation of study results and in the opinion of the investigator, would make the participant inappropriate for study entry.

Ipatasertib-Specific Exclusion Criteria:

* Type 1 or Type 2 diabetes mellitus requiring insulin at study entry.
* History of inflammatory bowel disease (e.g., Crohn disease and ulcerative colitis) or active bowel inflammation (e.g., diverticulitis).
* Grade \>= 2 uncontrolled or untreated hypercholesterolemia or hypertriglyceridemia.
* Treatment with strong CYP3A inhibitor or strong CYP3A inducer within 2 weeks or 5 drug-elimination half-lives of this treatment (whichever is longer) prior to initiation of study drug.

Atezolizumab-Specific Exclusion Criteria:

* Active or history of autoimmune disease or immune deficiency.
* History of idiopathic pulmonary fibrosis, organizing pneumonia (e.g., bronchiolitis obliterans), drug-induced pneumonitis, idiopathic pneumonitis, or evidence of active pneumonitis on screening chest computed tomography (CT) scan.
* Prior allogeneic stem cell or solid organ transplantation.
* Treatment with a live, attenuated vaccine within 4 weeks prior to initiation of study treatment, or anticipation of need for such a vaccine during treatment with atezolizumab or within 5 months after the last dose of atezolizumab.
* History of severe allergic anaphylactic reactions to chimeric or humanized antibodies or fusion proteins.
* Known hypersensitivity to Chinese hamster ovary cell products or recombinant human antibodies.
* Treatment with systemic immunostimulatory agents within 4 weeks or 5 drug-elimination half-lives of the drug (whichever is longer) prior to initiation of study treatment.
* Need for chronic corticosteroid therapy of \>10 mg of prednisone per day or an equivalent dose of other anti-inflammatory corticosteroids or immunosuppressants for a chronic disease.
* Treatment with systemic immunosuppressive medication within 2 weeks prior to initiation of study treatment, or anticipation of need for systemic immunosuppressive medication during the course of the study.

Docetaxel-Specific Exclusion Criteria:

* Known hypersensitivity or contraindication to any component of docetaxel, including its excipient polysorbate 80.
* Grade \>= 2 peripheral neuropathy.

Primary outcomes:
measure: Percentage of Participants with Adverse Events (AEs)
timeFrame: Up to 35 months
measure: Confirmed Prostate Specific Antigen (PSA) Response
timeFrame: Up to 35 months
measure: Overall Response Rate (ORR) (In participants presenting with measurable visceral disease or measurable extrapelvic adenopathy at baseline)
timeFrame: Up to 35 months
Secondary outcomes:
measure: Time to PSA Progression
timeFrame: Up to 35 months
measure: radiographic Progression-Free Survival (rPFS)
timeFrame: Up to 35 months
measure: Overall Survival (OS) (median OS and landmark survival at 12, 18 and 24 months)
timeFrame: Up to 35 months
measure: Documented Objective Response (DOR) (In participants presenting with measurable visceral disease or measurable extrapelvic adenopathy at baseline)
timeFrame: Up to 35 months
measure: Clinical Benefit Rate (CBR) (In participants presenting with measurable visceral disease or measurable extrapelvic adenopathy at baseline)
timeFrame: Up to 35 months
measure: Plasma Concentrations (ng/mL) of Ipatasertib and G-037720 at pre-specified timepoints
timeFrame: Up to 35 months
measure: Serum Concentrations (ng/mL) of Atezolizumab at pre-specified timepoints
timeFrame: Up to 35 months
measure: Percentage of Participants with Anti-Drug Antibodies (ADAs) to Atezolizumab
timeFrame: Up to 35 months
Other outcomes:
Locations:
city: Besancon
country: France
facility: HOPITAL JEAN MINJOZ; Oncologie
city: Montpellier
country: France
facility: Centre Val Aurelle Paul Lamarque; Radiotherapie
city: Saint-Mande
country: France
facility: Hopital d'Instruction des Armees de Begin
city: Villejuif
country: France
facility: Gustave Roussy
city: Milano
country: Italy
facility: Fondazione IRCCS Istituto Nazionale dei Tumori
state: Lombardia
city: Barcelona
country: Spain
facility: Institut Catala d Oncologia Hospital Duran i Reynals
city: Madrid
country: Spain
facility: Hospital Ramon y Cajal; Servicio de Oncologia
city: Chur
country: Switzerland
facility: Kantonsspital Graubünden Medizin Onkologie; Onkologie und Hämatologie
city: Zürich
country: Switzerland
facility: UniversitätsSpital Zürich; Zentrum für Hämatologie und Onkologie, Klinik für Onkologie
Study officials:
affiliation: Hoffmann-La Roche
name: Clinical Trials
role: STUDY_DIRECTOR
References: