Only 72 spots left

~72 spots leftby Apr 2026

Tilpisertib for Ulcerative Colitis
(PALEKONA Trial)

Recruiting in Palo Alto (17 mi)

+124 other locations

Age: 18+

Sex: Any

Travel: May Be Covered

Time Reimbursement: Varies

Trial Phase: Phase 2

Recruiting

Sponsor: Gilead Sciences

Disqualifiers: Crohn's disease, Opportunistic infection, others

Prior Safety Data

Trial Summary

What is the purpose of this trial?

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.

Will I have to stop taking my current medications?

The trial information does not specify if you need to stop taking your current medications, but it mentions that ongoing therapy with prohibited medications is not allowed. It's best to discuss your current medications with the trial team to see if they are allowed.

Research Team

Gilead Study Director

Principal Investigator

Gilead Sciences

Eligibility Criteria

This trial is for adults aged 18-75 with moderate to severe ulcerative colitis confirmed by endoscopy. Participants must have tried at least one advanced UC therapy without success, but not more than three. They should have had a colonoscopy in the last two years if they've had UC for over eight years.

Inclusion Criteria

I am a man, or a woman not pregnant or breastfeeding, aged 18-75.

My ulcerative colitis is moderate to severe, based on a specific scoring system.

I have had ulcerative colitis for at least 3 months, confirmed by tests, affecting at least 15 cm from the anal verge.

See 3 more

Trial Timeline

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Blinded Treatment

Participants receive tilpisertib fosmecarbil or placebo for up to 12 weeks. Efficacy assessment at Week 12.

12 weeks

Non-responder Treatment

Participants not achieving clinical response at Week 12 receive tilpisertib fosmecarbil Dose A for another 12 weeks. Efficacy assessment at Week 12 of this phase.

12 weeks

Extension

Participants achieving clinical response continue treatment with tilpisertib fosmecarbil for up to Week 52.

40 weeks

Follow-up

Participants are monitored for safety and effectiveness after treatment

4 weeks

Treatment Details

Interventions

Tilpisertib Fosmecarbil (Other)

Trial OverviewThe study tests Tilpisertib Fosmecarbil's effectiveness and safety against a placebo in treating ulcerative colitis. The main goal is to see if patients show clinical improvement after 12 weeks of treatment compared to those taking the placebo.

Participant Groups

4Treatment groups

Experimental Treatment

Placebo Group

Group I: Tilpisertib Fosmecarbil Dose CExperimental Treatment1 Intervention

Blinded Treatment Phase: Participants will receive tilpisertib fosmecarbil Dose C for up to 12 weeks. An efficacy assessment will be performed at Week 12. • Participants who achieve clinical response will receive tilpisertib fosmecarbil Dose C for up to Week 52. Non-responder Treatment Phase: • Participants who do not achieve clinical response at Week 12 will discontinue the Blinded Treatment Phase and have the option to enter into the Non-responder Treatment Phase. Participants will receive tilpisertib fosmecarbil Dose B for another 12 weeks. An efficacy assessment will be performed at Week 12 of the Non-responder Treatment Phase. Participants who achieved clinical response will receive tilpisertib fosmecarbil Dose B for up to Week 52. Participants who do not achieve clinical response at Non-responder Treatment Phase Week 12 will discontinue study drug.

Group II: Tilpisertib Fosmecarbil Dose BExperimental Treatment1 Intervention

Blinded Treatment Phase: Participants will receive tilpisertib fosmecarbil Dose B for up to 12 weeks. An efficacy assessment will be performed at Week 12. • Participants who achieve clinical response will receive tilpisertib fosmecarbil Dose B for up to Week 52. Non-responder Treatment Phase: • Participants who do not achieve clinical response at Week 12 will discontinue the Blinded Treatment Phase and have the option to enter into the Non-responder Treatment Phase. Participants will receive tilpisertib fosmecarbil Dose B for another 12 weeks. An efficacy assessment will be performed at Week 12 of the Non-responder Treatment Phase. Participants who achieved clinical response will receive tilpisertib fosmecarbil Dose B for up to Week 52. Participants who do not achieve clinical response at Non-responder Treatment Phase Week 12 will discontinue study drug.

Group III: Tilpisertib Fosmecarbil Dose AExperimental Treatment1 Intervention

Blinded Treatment Phase: Participants will receive tilpisertib fosmecarbil Dose A for up to 12 weeks. An efficacy assessment will be performed at Week 12. • Participants who achieve clinical response will receive tilpisertib fosmecarbil Dose B for up to Week 52. Non-responder Treatment Phase: • Participants who do not achieve clinical response at Week 12 will discontinue the Blinded Treatment Phase and have the option to enter into the Non-responder Treatment Phase. Participants will receive tilpisertib fosmecarbil Dose A for another 12 weeks. An efficacy assessment will be performed at Week 12 of the Non-responder Treatment Phase. Participants who achieved clinical response will receive tilpisertib fosmecarbil Dose B for up to Week 52. Participants who do not achieve clinical response at Non-responder Treatment Phase Week 12 will discontinue study drug.

Group IV: Tilpisertib Fosmecarbil PlaceboPlacebo Group2 Interventions

Blinded Treatment Phase: Participants will receive tilpisertib fosmecarbil placebo for up to 12 weeks. An efficacy assessment will be performed at Week 12. • Participants who achieve clinical response will receive tilpisertib fosmecarbil Dose C for up to Week 52. Non-responder Treatment Phase: • Participants who do not achieve clinical response at Week 12 will discontinue the Blinded Treatment Phase and have the option to enter into the Non-responder Treatment Phase. Participants will receive tilpisertib fosmecarbil Dose A for another 12 weeks. An efficacy assessment will be performed at Week 12 of the Non-responder Treatment Phase. Participants who achieved Clinical Response will receive tilpisertib fosmecarbil Dose B for up to Week 52. Participants who do not achieve Clinical Response at Non-responder Treatment Phase Week 12 will discontinue study drug.