New hope for stomach cancer: experimental drug combo tested
NCT ID NCT06256328
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 2 times
Summary
This phase 2 trial tests whether adding an experimental drug (ONO-4578) to standard immunotherapy (nivolumab) and chemotherapy helps people with advanced HER2-negative stomach cancer. About 226 participants who have not had prior chemotherapy will receive either the experimental combo or a placebo plus standard treatment. The study aims to see if the new combination can slow cancer growth and improve survival.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- ONO-4578 (an experimental drug) combined with nivolumab (Opdivo) and chemotherapy (oxaliplatin, capecitabine, or S-1)
- What this could lead to
- If successful, this could offer a new treatment option for people with advanced gastric cancer, potentially slowing disease progression.
- What could go wrong
- This is an early phase 2 trial with 226 participants, so results are not yet proven. The experimental drug may not improve outcomes and could cause additional side effects.
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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226 people
The number who actually took part.
- Started
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Jan 2024
- Expected to finish
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Jul 2027
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.
Inclusion Criteria: * Patients with gastric or esophagogastric junction cancer histologically diagnosed as adenocarcinoma * Patients have not been treated with systemic chemotherapy as first-line therapy * Patients who can provide tumor tissue samples Exclusion Criteria: * Patients unable to take oral medicines * Patients with HER2-positive * Patients with contraindications to nivolumab, oxaliplatin, S-1, or capecitabine * Patients who have a history of severe drug-related adverse reactions caused by non- steroidal anti-inflammatory drugs (NSAIDs) or who have complications caused by NSAIDs requiring treatment * Patients with concurrent autoimmune disease or a history of chronic or recurrent autoimmune disease, such as rheumatoid arthritis * Patients with headache and/or nausea associated with brain metastasis
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for Gastric cancer are added.
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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.
Contacts and locations
Locations
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Aichi Cancer Center Hospital
Nagoya, Aichi-ken, Japan
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Ajou University Hospital
Suwon, Gyeonggi-do, South Korea
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Asan Medical Center
Seoul, South Korea
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CHA Bundang Medical Center, CHA University
Seongnam-si, Gyeonggi-do, South Korea
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Cancer Institute Hospital of JFCR
Koto-ku, Tokyo, Japan
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Chang Gung Memorial Hospital, Linkou
Taoyuan, Taiwan
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Chi Mei Hospital, Liouying
Tainan, Taiwan
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China Medical University Hospital
Taichung, Taiwan
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Chonnam National University Hwasun Hospital
Hwasun-gun, Jeollanam-do, South Korea
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Chungbuk National University Hospital
Cheongju-si, North Chungcheong, South Korea
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Dong-A University Hospital
Busan, South Korea
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Gachon University Gil Medical Center
Incheon, South Korea
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Gunma Prefectural Cancer Center
Ota-shi, Gunma, Japan
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Hallym University Sacred Heart Hospital
Anyang-si, Gyeonggi-do, South Korea
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Hiroshima City Hiroshima Citizens Hospital
Hiroshima, Hiroshima, Japan
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Hyogo Cancer Center
Akashi-shi, Hyōgo, Japan
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IMSUT Hospital, The Institute of Medical Science, The University of Tokyo
Minato-Ku, Tokyo, Japan
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Ibaraki Prefectural Central Hospital
Kasama-shi, Ibaraki, Japan
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Inha University Hospital
Incheon, South Korea
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Ishikawa Prefectural Central Hospital
Kanazawa, Ishikawa-ken, Japan
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Iwate Medical University Hospital
Yahaba-cho, Shiwa-gun, Iwate, Japan
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JCHO Kyushu Hospital
Yahatanishi-ku, Kitakyusyu-shi, Fukuoka, Japan
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JOHAS Kansai Rosai Hospital
Amagasaki-shi, Hyōgo, Japan
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Jeonbuk national university hospital
Jeonju, Jeollabuk-do, South Korea
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Kagawa University Hospital
Miki-cho, Kita-gun, Kagawa-ken, Japan
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Kanagawa Cancer Center
Yokohama, Kanagawa, Japan
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Kangbuk Samsung Hospital
Seoul, South Korea
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Kansai Medical University Hospital
Hirakata-shi, Osaka, Japan
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Kaohsiung Medical University Chung-Ho Memorial Hospital
Kaohsiung City, Taiwan
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Keimyung University Dongsan Hospital
Daegu, South Korea
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Keio University Hospital
Shinjuku-ku, Tokyo, Japan
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Kindai University Hospital
Sayama-shi, Osaka, Japan
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Kitasato University Hospital
Sagamihara-shi, Kanagawa, Japan
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Kobe City Hospital Organization Kobe City Medical Center General Hospital
Kobe, Hyōgo, Japan
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Korea University Guro Hospital
Seoul, South Korea
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Kosin University Gospel Hospital
Busan, Gangwon-do, South Korea
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Kurashiki Central Hospital
Kurashiki-shi, Okayama-ken, Japan
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Kyung Hee University Hospital
Seoul, South Korea
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Kyungpook National University Chilgok Hospital
Daegu, South Korea
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Kyushu University Hospital
Fukuoka, Fukuoka, Japan
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Matsuyama Red Cross Hospital
Matsuyama, Ehime, Japan
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NHO Kyushu Cancer Center
Fukuoka, Fukuoka, Japan
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NHO Shikoku Cancer Center
Matsuyama, Ehime, Japan
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National Cancer Center
Goyang-si, Gyeonggi-do, South Korea
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National Cancer Center Hospital East
Kashiwa-shi, Chiba, Japan
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National Cheng Kung University Hospital
Tainan, Taiwan
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National Taiwan University Hospital
Taipei, Taiwan
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Osaka General Medical Center
Sumiyoshi-ku, Osaka, Japan
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Osaka International Cancer Institute
Chuo-ku, Osaka, Japan
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Osaka Medical and Pharmaceutical University Hospital
Takatsuki-shi, Osaka, Japan
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Osaka Metropolitan University Hospital
Osaka, Osaka, Japan
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Osaki Citizen Hospital
Osaki-shi, Miyagi, Japan
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Pusan National University Yangsan Hospital
Yangsan, Gyeongsangnam-do, South Korea
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Saitama Cancer Center
Ina-machi, Kitaadati-gun, Saitama, Japan
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Samsung Medical Center
Seoul, South Korea
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Seoul National University Bundang Hospital
Seongnam-si, Gyeonggi-do, South Korea
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Severance Hospital, Yonsei University Health System
Seoul, South Korea
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Shizuoka Cancer Center
Nagaizumi-cho, Sunto-gun, Shizuoka, Japan
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The Catholic University of Korea, Eunpyeong St. Mary's Hospital
Seoul, South Korea
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The Catholic University of Korea, St. Vincent's Hospital
Suwon, Gyeonggi-do, South Korea
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Tohoku University Hospital
Sendai, Miyagi, Japan
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Ulsan University Hospital
Ulsan, South Korea
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Yeungnam University Hospital
Daegu, South Korea
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a personalized menu keep cancer patients stronger through chemotherapy?
- Nerve-Block procedure tested against severe pancreatic and stomach cancer pain
- Robotic surgery vs standard approaches: does the platform change cancer outcomes?
- Can a direct hit to tumors make immunotherapy work better?
- New antibody aims to preserve immune checkpoint while fighting cancer
- Engineered immune cells target two markers on Hard-to-Treat tumors