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Brief Title: GB1275 Monotherapy and in Combination With an Anti-PD1 Antibody in Patients With Specified Advanced Solid Tumors or in Combination With Standard of Care in Patients With Metastatic Pancreatic Adenocarcinoma

A Phase 1/2, First-in-Human, Open-label, Dose Escalation Study of GB1275 Monotherapy and in Combination With an Anti-PD-1 Antibody in Patients With Specified Advanced Solid Tumors or in Combination With Standard of Care in Patients With Metastatic Pancreatic Adenocarcinoma, Followed by Basket Expansion of GB1275 With Standard of Care or in Combination With an Anti-PD-1 Antibody in Patients With Specified Metastatic Solid Tumors


  • Org Study ID: GB1275-1101 (KEYNOTE-A36)
  • Secondary ID: N/A
  • NCT ID: NCT04060342
  • Sponsor: GB006, Inc., a wholly owned subsidiary of Gossamer Bio, Inc.


This first-in-human (FIH ) study is an open-label, multicenter study that consists of a Phase 1 Dose Escalation/Expansion phase of GB1275 monotherapy or in combination with Anti-PD-1 Antibody or in combination with Standard of Care in Patients with Metastatic Pancreatic Adenocarcinoma followed by a Phase 2 Basket Expansion phase in Patients with Specified Metastatic Solid Tumors


Note: The Phase 2 portion of the study was not initiated.

  • Overall Status
  • Start Date
    August 13, 2019
  • Phase
    Phase 1
  • Study Type


Primary Outcome 1 - Measure:

Primary Outcome 1 - Timeframe: N/A


  • Pancreatic Adenocarcinoma
  • Esophageal Adenocarcinoma
  • Esophageal Squamous Cell Carcinoma
  • Gastric Adenocarcinoma
  • Gastroesophageal Junction Adenocarcinoma
  • Triple Negative Breast Cancer
  • Castration-resistant Prostate Cancer
  • Microsatellite Stable Colorectal Cancer
  • Non-small Cell Lung Cancer
  • Small-cell Lung Cancer
  • Head and Neck Squamous Cell Carcinoma
  • Urothelial Carcinoma
  • Renal Cell Carcinoma
  • Hepatocellular Carcinoma


Inclusion Criteria:
* Subject has a performance status of 0 or 1 on the Eastern Cooperative Oncology Group (ECOG) Performance Scale.

- * Women of childbearing potential must use an acceptable method of contraception
Phase 1
Subjects with the the following:
* Regimen A and B:
* pancreatic adenocarcinoma,

- * esophageal adenocarcinoma, or esophageal squamous cell carcinoma, or

- * gastric/gastroesophageal junction adenocarcinoma, or

- * TNBC, or

- * prostate cancer, or

- * colorectal adenocarcinoma, or subjects with tumor types that have progressed after receiving initial treatment benefit rom the last single agent checkpoint inhibitor that is approved for the indication or in combination with standard of care therapy, for example, non-small cell lung cancer, small cell lung cancer, head and neck squamous cell carcinoma, urothelial carcinoma, renal cell carcinoma, and hepatocellular carcinoma, etc.

- * Regimen C: newly diagnosed stage IV pancreatic cancer
Phase 2
* Cohort 1: pancreatic cancer.

- * Cohort 2: colorectal cancer

- * Cohort 3: gastric/GEJ adenocarcinoma
Exclusion Criteria:
* History of another malignancy within 2 years prior to first study drug(s) administration, unless the malignancy was treated with curative intent and the likelihood of relapse is <5% in 2 years - * Pregnant or nursing - * Known history of testing positive for human immunodeficiency virus (HIV) - * Gastrointestinal (GI) tract disease causing the inability to take oral medication. - * Positive test for Hepatitis B virus surface antigen (HBsAg) or a and/or positive Hep C antibody result with detectable hepatitis C virus (HCV) ribonucleic acid (RNA) indicating acute or chronic infection.
Other protocol-defined inclusion/exclusion criteria will apply

Gender: All

Minimum Age: 18 Years

Maximum Age: N/A

Healthy Volunteers: No


Name: N/A

Role: N/A

Affiliation: N/A

Overall Contact

Name: N/A

Phone: N/A

Email: N/A


Facility Status Contact