for people ages 18-75 (full criteria)
at San Francisco, California and other locations
study started
completion around



The goal of this study is to learn if tilpisertib fosmecarbil (formerly known as GS-5290) is effective and safe in treating participants with moderate to severe ulcerative colitis. The study will compare participants in different treatment groups treated with tilpisertib fosmecarbil with participants treated with placebo.

The primary objective of this study is to demonstrate the efficacy of tilpisertib fosmecarbil, compared to placebo control, in achieving Clinical Response at Week 12.

Official Title

A Phase 2, Double-Blinded, Randomized, Placebo-Controlled, Dose-Ranging Study Evaluating the Efficacy and Safety of GS-5290 in Participants With Moderately to Severely Active Ulcerative Colitis


Ulcerative Colitis, Colitis, Ulcer, Tilpisertib Fosmecarbil


You can join if…

Open to people ages 18-75

  • Individuals assigned male at birth, or nonpregnant, nonlactating individuals assigned female at birth, 18 to 75 years of age based on the date of the screening visit.
  • Ulcerative colitis (UC) of at least 90-day duration before randomization confirmed by endoscopy and histology at any time in the past AND a minimum disease extent of 15 cm from the anal verge. Documentation of endoscopy and histology consistent with the diagnosis of UC must be available in the source documents prior to the initiation of screening.
  • Moderately to severely active UC as determined during screening with a modified Mayo Clinic Score based on the sum of Stool Frequency, Rectal Bleeding, and Endoscopic Finding of 5 to 9 points and an endoscopic subscore of 2 to 3 (determined by central reader).
  • Previous treatment history of approved UC therapy with at least one advanced therapy mechanisms of action but failure (ie, loss of response or lack of response) of no more than 3 different advanced therapy mechanisms of action.
  • A surveillance colonoscopy for dysplasia is required prior to randomization if indicated by regional guidelines for individuals with UC.

You CAN'T join if...

  • Current diagnosis of Crohn's Disease (CD) or diagnosis of indeterminate colitis due to an enteric pathogen, lymphocytic or collagenous colitis.
  • Individuals with disease limited to the rectum (ulcerative proctitis) during screening endoscopy.
  • Requirement for ongoing therapy with or prior use of any prohibited medications.
  • Active clinically significant infection, or any infection requiring hospitalization or treatment with intravenous anti-infectives within 8 weeks.

of randomization; or any infection requiring oral anti-infective therapy within 6 weeks of randomization.

  • History of opportunistic infection.
  • Current diagnosis of acute severe colitis, fulminant colitis, or toxic megacolon.

Note: Other protocol-defined Inclusion/Exclusion criteria may apply.


  • UCSF accepting new patients
    San Francisco California 94115 United States
  • Gastro Care Institute accepting new patients
    Lancaster California 93534 United States
  • Om Research LLC accepting new patients
    Lancaster California 93534 United States


accepting new patients
Start Date
Completion Date
Gilead Sciences
Related Info
Phase 2 research study
Study Type
Expecting 176 study participants
Last Updated