A Dose Optimization/Expansion Study of SAR445877 in Adult Chinese Participants With Advanced Gastric or Gastroesophageal Junction Cancer

Recruiting now · Phase 2

Conditions studied: Gastric Cancer, Oesophageal Carcinoma

In brief

This is a Phase 2, open-label, dose optimization/expansion study to assess the preliminary efficacy and safety of SAR445877 as a monotherapy for Chinese participants aged at least 18 years with advanced Gastric Cancer(GC)/Gastroesophageal Junction cancer (GEJ). Participants with advanced GC/GEJ who relapsed to at least 1 prior regimen which may or may not include an anti-PD1/PD-L1-based treatment depending on local standard of care, regardless combined positivity score (CPS) will be randomized in this study. In this study, SAR445877 will be assessed as a monotherapy in approximately 30 participants with advanced unresectable or metastatic GC or Siewert Type 2 and 3 GEJ, and for whom receiving the standard of care (SOC) is not in his or her best interest, or where no SOC is established. Human epidermal growth factor receptor 2 (HER2) positive cases will not be eligible unless they have progressed on a HER2 targeted therapy. Those participants should have received at least 1 prior line of anti-cancer treatment which may or may not include an anti-PD1/PD-L1-based treatment depending on local standard of care. Metastatic microsatellite instability-high (MSI-H) or mismatch repair deficient (dMMR) cases are not eligible.

Key facts

Study ID

NCT07692204

Run by

Sanofi

People needed

30

Starts

2026-07-01

Expected to finish

2028-08-02

Last updated by the study team

2026-07-20

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Age
• Participant must be at least 18 years of age inclusive (or country's legal age of majority if >18 years), at the time of signing the informed consent.
• Cancer diagnosis:
• Histologically or cytologically confirmed diagnosis of advanced unresectable or metastatic GC or Siewert Type 2 \& 3 GEJ.
• Participants with unknown HER2/neu status must have their HER2/neu status determined locally. Participants with HER2/neu negative are eligible. Participants with HER2/neu positive tumors must have documentation of disease progression on treatment containing an approved HER2 targeted therapy to be eligible.
• Prior anticancer therapy:
• Participants should have failed or relapsed after at least 1 prior line of treatment which may or may not include an anti-PD1/PD-L1-based treatment or anti-Claudin 18.2 based treatment depending on local standard of care.
• Measurable Disease:
• At least 1 measurable lesion per RECIST 1.1 criteria.

You may not qualify if…

• Medical conditions
• Eastern Cooperative Oncology Group(ECOG)performance status of ≥2.
• Predicted life expectancy ≤3 months.
• Diagnosed of any other malignancies, either progressing or requiring active treatments, within 2 years prior to enrollment.
• Active brain metastases or leptomeningeal metastases.
• Known microsatellite instability-high (MSI-H) or mismatch repair-deficient (dMMR) tumor.
• History of treatment-related immune-mediated (or immune-related) AEs from immune- modulatory agents (including but not limited to anti-PD1/PD-L1 agents and anti cytotoxic T lymphocyte associated protein 4 monoclonal antibodies) that caused permanent discontinuation of the agent, or that were Grade 4 in severity, or have not resolved to Grade ≤1.
• Has any condition requiring ongoing/continuous corticosteroid therapy (>10 mg prednisone/day or an anti-inflammatory equivalent) within 1 week prior to the first dose of the study medicine.
• Any clinically significant cardiac (including valvular) or vascular (thromboembolic disorders) disease, within 6 months prior to the first IMP administration.
• Ongoing or recent (within 2 years) evidence of significant autoimmune disease that required treatment with systemic immunosuppressive treatments, which may suggest risk for immune-related AEs (irAEs).
• Has a known history or any evidence of interstitial lung disease or active, non-infectious pneumonitis within 3 years prior to the first dose of the study drug.
• Organ transplant requiring immunosuppressive treatment.
• Uncontrolled or active infection with human immunodeficiency virus (HIV ), hepatitis B, or hepatitis C infection, or has a diagnosis of immunodeficiency.
• Note: Other Inclusion/Exclusion criteria may apply. The above information is not intended to contain all considerations relevant to a participant's potential participation in a clinical trial.

Where it is running

• Investigational Site Number : 1560001 — Shanghai, China (enrolling)

Full record on ClinicalTrials.gov

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