New hope for stomach and bowel cancers: experimental drug Rina-S enters Mid-Stage trial
NCT ID NCT07539311
First seen Jun 25, 2026 · Last updated Sep 10, 2026 · Updated 7 times
Summary
This Phase 2 trial is testing a new drug called Rina-S (rinatabart sesutecan) in about 160 people with advanced gastrointestinal cancers that have spread or cannot be removed. The drug is given alone through an IV, and everyone receives it—no placebo. The study will check if the drug shrinks tumors and how long that effect lasts, while also monitoring side effects. Participants may continue treatment as long as their cancer does not worsen and side effects are manageable.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Rina-S (rinatabart sesutecan)
- What this could lead to
- If it works, this could point toward a new treatment option for advanced gastrointestinal cancers that have not responded to other therapies.
- What could go wrong
- This is an early Phase 2 trial with a small number of participants, so results may not confirm effectiveness. Side effects are possible, and the drug may not work for all cancer types studied.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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About 160 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2026
- Expected to finish
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Nov 2028
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Key Inclusion Criteria: • All study cohorts * Participant has histologically or cytologically confirmed GI cancer. * Participant has documented metastatic or unresectable disease, not amenable to treatment with curative intent. * Participant has measurable disease per the Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1 at baseline. * Participant must have radiological disease progression while on or after receiving the most recent regimen. * Participant has Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1. * Participant has life expectancy ≥3 months. * Participant must be able to provide a newly obtained or archival tissue sample. * Participant must have adequate organ and bone marrow function, per laboratory test results prior to Rina-S administration. Key Exclusion Criteria (all study cohorts): * Participant has clinically significant non-malignant gastrointestinal disorders, including but not limited to, diarrhea \> grade 1, ulcerative colitis, inflammatory bowel disease. * Participants with recent (up to 4 weeks) history of significant gastrointestinal bleeding, current cancer related ulcerations, fistula, abscess or recent perforation (within 4 to 6 weeks). * Participant has a past or current malignancy other than the inclusion diagnosis before the planned first dose of trial treatment, or any evidence of residual disease from a previously diagnosed malignancy. * Participants with newly identified or known unstable (eg, progressing brain metastases) or symptomatic central nervous system (CNS) metastases or history of carcinomatous meningitis (also known as leptomeningeal disease). * Prior treatment with topoisomerase-1 inhibitor containing antibody-drug conjugate (ADC). * Treatment with an anticancer agent within 28 days prior to the first dose of trial treatment. Note: Other protocol-defined Inclusion and Exclusion criteria may apply.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
6 sites in 2 countries. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Cancer Institute Hospital of JFCR
RECRUITINGKōtoku, Tokyo-To, 135-8550, Japan
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Kanagawa Cancer Center
RECRUITINGYokohama, Kanagawa, 241-8515, Japan
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National Cancer Center Hospital East
RECRUITINGKashiwa, Chiba, 277-8577, Japan
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START Midwest
RECRUITINGGrand Rapids, Michigan, 49546, United States
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START San Antonio
RECRUITINGSan Antonio, Texas, 78229, United States
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The University of Osaka Hospital
RECRUITINGSuita, Osaka, 565-0871, Japan
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