GDC-1261 in advanced or metastatic prostate cancer
Official title: A Phase I/II Dose-escalation and Expansion Study Evaluating the Safety, Pharmacokinetics, and Preliminary Activity of GDC-1261 in Patients With Advanced or Metastatic Prostate Cancer
Run by Genentech, Inc. · NCT07567846 · Data updated 2026-11-12
This study tests GDC-1261 to see if it is safe and how it behaves in people with advanced or metastatic prostate cancer who have progressed on prior therapy.
Quick facts
| Phase | Phase1; Phase2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | Men only |
| Enrollment | 260 (estimated) |
| Sponsor | Genentech, Inc. Industry-sponsored |
| Locations | 6 sites (Scottsdale, Arizona and 5 other locations) |
| Status | Recruiting |
| Started | April 29, 2026 |
| Main results expected | November 30, 2027 |
| Study ends | December 30, 2027 |
| Registry record updated | November 5, 2026 |
| Trial ID | NCT07567846 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults with metastatic or advanced prostate cancer, progressing after prior therapy, maintained on or having had ADT, ECOG 0-1, and adequate organ function.
✕Probably not a fit
Patients with rapid disease progression, poor organ function, active infections, untreated CNS metastases, or other serious medical conditions may not benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a combined Phase 1/2 interventional trial evaluating GDC-1261 in men with advanced or metastatic prostate cancer. Participants will receive GDC-1261 and will be monitored for safety, how the drug is processed by the body, and any early signs of anti-tumor activity. The study aims to identify a recommended dose and regimen for future testing. Eligibility requires prior therapy with disease progression, ongoing or prior ADT, adequate organ function, and good performance status. Key exclusions include recent systemic therapy, untreated CNS metastases, uncontrolled pain, active infection, or recent cancer within the last five years.
Why it matters
Potential benefit: If successful, participants may experience disease stabilization or tumor responses and the findings could inform future dosing for GDC-1261 in prostate cancer.
How similar studies have gone: Previous early-phase studies in targeted agents for prostate cancer have shown potential signals of activity, but each agent is unique and this specific approach is investigational.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Eastern Cooperative Oncology Group (ECOG) Performance Status of \<=1 * Life expectancy is \>= 3 months * Histologically or cytologically confirmed prostate adenocarcinoma * Disease progression during or following the direct prior line of therapy * Ongoing androgen deprivation therapy (ADT) with gonadotropin-releasing hormone (GnRH) agonist or antagonist, or have had bilateral orchiectomy * Metastatic disease * Adequate end organ function Exclusion Criteria: * Treatment with any approved systemic anti-cancer therapy within 14 days or 5 drug elimination half-lives * Structurally unstable bone lesions suggest an impending fracture * Untreated central nervous system (CNS) metastases or leptomeningeal disease * Uncontrolled pain * History of malignancy within 5 years * Infection requiring systemic IV antibiotics within 14 days or oral antibiotics within 7 days prior to screening, or any evidence of current infection * Any medical condition or abnormal clinical laboratory finding that, in the investigator's judgment, would preclude the individual's safe participation in and completion of the study or could affect the interpretation of the results
Where it's running
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Honor Health Research Institute
Scottsdale, Arizona, United States Recruiting -
Yale Cancer Center
New Haven, Connecticut, United States Recruiting -
Sarah Cannon Research Institute
Nashville, Tennessee, United States Recruiting -
St Vincent's Hospital Sydney
Darlinghurst, New South Wales, Australia Recruiting -
Austin Hospital
Heidelberg, Victoria, Australia Recruiting -
The Royal Marsden in Sutton, Surrey - Downs Rd
Sutton, Surrey, United Kingdom Recruiting
Study contacts
- Study coordinator: Reference Study ID Number: GO46445 https://forpatients.roche.com/ No attachments to email below.
- Email: global-roche-genentech-trials@gene.com
- Phone: 888-662-6728
Similar studies
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.