A Study to Evaluate the Safety and the Activity of S095029 as Part of Combination Therapy in Advanced Gastroesophageal Junction/Gastric Cancers.

NCT ID: NCT06116136

Last Updated: 2025-10-14

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

ACTIVE_NOT_RECRUITING

Clinical Phase

PHASE1/PHASE2

Total Enrollment

38 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-08-31

Study Completion Date

2026-08-31

Brief Summary

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This study will investigate the safety, tolerability, and antitumor activity of S095029 (anti-NKG2A antibody) in combination with pembrolizumab in in microsatellite instability-high/Defective mismatch repair (MSI-H/dMMR) locally advanced unresectable or metastatic gastric /GEJ adenocarcinomas.

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Detailed Description

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This Phase 1b/2 study will be conducted in two parts; a safety lead-in part (Phase 1b) to identify the RP2D of S095029 in combination with pembrolizumab and an expansion part (Phase 2) to evaluate anti-tumor activity and safety in participants with locally advanced unresectable or metastatic MSI-H/dMMR gastric /GEJ adenocarcinomas.

Conditions

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MSI-H/dMMR Gastroesophageal-junction Cancer MSI-H/dMMR Gastric Cancer

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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S095029 and pembrolizumab

Participants diagnosed with gastric cancer (GC) or gastroesophageal junction cancer (GEJ), not previously treated with checkpoint inhibitors (CPIs) may first be enrolled into a Phase 1b safety lead-in part which will be used to identify the recommended Phase 2 dose (RP2D) of S095029 in combination with pembrolizumab. During the Phase 2 part, participants will receive the recommended Phase 2 dose (RP2D) of S095029, along with pembrolizumab.

Group Type EXPERIMENTAL

S095029

Intervention Type DRUG

Participants will be treated with S095029 via intravenous (IV) infusion every 3 weeks (Q3W).

pembrolizumab 200 mg (KEYTRUDA ®)

Intervention Type DRUG

Participants will be treated with 200 mg of pembrolizumab via intravenous (IV) infusion every 3 weeks (Q3W).

Interventions

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S095029

Participants will be treated with S095029 via intravenous (IV) infusion every 3 weeks (Q3W).

Intervention Type DRUG

pembrolizumab 200 mg (KEYTRUDA ®)

Participants will be treated with 200 mg of pembrolizumab via intravenous (IV) infusion every 3 weeks (Q3W).

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Have a confirmed diagnosis of locally advanced and unresectable or metastatic gastric or gastro-esophageal junction adenocarcinoma
* Participants' tumor must have an MSI-H/dMMR status according to institutional guidelines and/or according to the College of American Pathologists, determined at any time prior to enrolment.

Exclusion Criteria

* Has received more than one previous line of treatment in the locally advanced and unresectable or metastatic setting.
* Has received prior therapy with any checkpoint inhibitor (anti-PD-1, anti-programmed cell death ligand 1 (PDL1), anti-CTLA4).
* Participants who have received prior systemic anti-cancer therapy including investigational agents within 4 weeks (shorter interval, at least 5 half-lives, for kinase inhibitors or other short half-life drugs) prior to first study treatment.
* Prior radiotherapy if completed less than 2 weeks before first study treatment
* Major surgery less than 4 weeks prior to the first study treatment or participants who have not recovered from the side effects of the surgery.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Merck Sharp & Dohme LLC

INDUSTRY

Sponsor Role collaborator

Institut de Recherches Internationales Servier

OTHER

Sponsor Role collaborator

Servier Bio-Innovation LLC

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Ocala Oncology Center Pl

Ocala, Florida, United States

Site Status

Investigative Clinical Research of Indiana, Llc

Noblesville, Indiana, United States

Site Status

MD Anderson Cancer Center

Houston, Texas, United States

Site Status

The Queen Elizabeth Hospital

Woodville South, , Australia

Site Status

Ordensklinikum Linz

Linz, Upper Austria, Austria

Site Status

Med Universitat Wien-Allgemeines Krankenhaus Der Stadt Wien (AKH)

Vienna, Vienna, Austria

Site Status

Landeskrankenhaus (SALK)

Salzburg, , Austria

Site Status

UZ Leuven Campus Gasthuisberg

Leuven, , Belgium

Site Status

Chu de Liege

Liège, , Belgium

Site Status

Cepon - Centro de Pesquisas Oncologicas

Florianópolis, , Brazil

Site Status

Supera Oncologia

Santa Catarina, , Brazil

Site Status

Icesp - Instituto Do Câncer Do Estado de São Paulo

São Paulo, , Brazil

Site Status

Instituto Brasileiro de Controle Do Câncer

São Paulo, , Brazil

Site Status

Hospital Albert Einstein

São Paulo, , Brazil

Site Status

Mount Sinai Hospital

Toronto, , Canada

Site Status

Beijing Cancer Hospital

Beijing, Beijing Municipality, China

Site Status

Harbin Medical University Cancer Hospital

Harbin, Heilongjiang, China

Site Status

Henan Cancer Hospital

Zhengzhou, Henan, China

Site Status

Liaoning Cancer Hospital

Shenyang, Liaoning, China

Site Status

Shandong Cancer Hospital Institute

Jinan, Shandong, China

Site Status

Fudan University Shanghai Cancer Center

Shanghai, Shanghai Municipality, China

Site Status

Sir Run Run Shaw Hospital Zhejiang University School of Medicine Qingchun Branch

Hangzhou, Zhengjiang Province, China

Site Status

Rigshospitalet

Copenhagen, , Denmark

Site Status

Odense Universitetshospital

Odense, , Denmark

Site Status

Institut Bergonié

Bordeaux, , France

Site Status

Centre Georges Francois Leclerc

Dijon, , France

Site Status

Chru Lille - Hopital Claude Huriez

Lille, , France

Site Status

Institut Curie

Saint-Cloud, , France

Site Status

Inst. de Cancer de L'ouest

Saint-Herblain, , France

Site Status

Institut de Cancerologie de Lorraine

Vandœuvre-lès-Nancy, , France

Site Status

Semmelweis Egyetem

Budapest, , Hungary

Site Status

Orszagos Onkologiai Intezet

Budapest, , Hungary

Site Status

Bugat Pal Hospital

Gyöngyös, , Hungary

Site Status

Bekes Megyei Kozponti Korhaz

Gyula, , Hungary

Site Status

A.O.U. Seconda Università Degli Studi Di Napoli

Campania, , Italy

Site Status

Fondazione IRCCS Istituto Nazionale dei Tumor

Milan, , Italy

Site Status

A.O.U. Pisana-Ospedale Santa Chiara

Pisa, , Italy

Site Status

Policlinico Universitario Agostino Gemelli

Rome, , Italy

Site Status

Policlinico G.B. Rossi A.O.U.I. Di Verona

Verona, , Italy

Site Status

Cancer Institute Hospital of Jfcr

Koto-Ku, Tokyo, Japan

Site Status

National Cancer Center Hospital

Chou-ku, , Japan

Site Status

Osaka International Cancer Institute

Osaka, , Japan

Site Status

Pan American Center For Oncology Trials, Llc

Rio Piedras, , Puerto Rico

Site Status

University Hospital Vall D'Hebron Institute of Oncology (VHIO)

Barcelona, , Spain

Site Status

Hospital Universitario Gregorio Marañón

Madrid, , Spain

Site Status

Hospital Universitario Marqués de Valdecilla

Santander, , Spain

Site Status

Hospital Universitario de Valencia

Valencia, , Spain

Site Status

The Royal Marsden in Chelsea

London, , United Kingdom

Site Status

The Royal Marsden in Sutton

Sutton, Surrey, , United Kingdom

Site Status

Countries

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United States Australia Austria Belgium Brazil Canada China Denmark France Hungary Italy Japan Puerto Rico Spain United Kingdom

Other Identifiers

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Keynote E70

Identifier Type: OTHER

Identifier Source: secondary_id

2023-507995-33

Identifier Type: EUDRACT_NUMBER

Identifier Source: secondary_id

MK-3475-E70

Identifier Type: OTHER

Identifier Source: secondary_id

CL1-95029-002

Identifier Type: -

Identifier Source: org_study_id

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