Clinical trial Recruiting at 1 site Phase 3 Interventional Ages 18 to 75

M108 plus chemotherapy for advanced gastric cancer treatment

Official title: A Phase 3, Multi-Center, Double-Blind, Randomized, Efficacy and Safety Study of M108 Monoclonal Antibody Plus CAPOX Versus Placebo Plus CAPOX as First-line Treatment for Claudin (CLDN) 18.2-Positive, HER2-Negative, PD-L1 CPS<5, Locally Advanced Unresectable or Metastatic Gastric or Gastroesophageal Junction (GEJ) Adenocarcinoma.

Run by FutureGen Biopharmaceutical (Beijing) Co., Ltd · NCT06177041 · Data updated 2026-11-12

This study is testing if adding a new drug called M108 to standard chemotherapy can help people with advanced stomach cancer live longer and feel better.

More Locally Advanced (Unresectable) or Metastatic Solid Tumors trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years to 75 Years
SexAll
Enrollment486 (estimated)
SponsorFutureGen Biopharmaceutical (Beijing) Co., Ltd
Industry-sponsored
Drugs / interventionsCAR-T, chemotherapy
Locations1 site (Beijing, Beijing Municipality)
StatusRecruiting
StartedDecember 25, 2023
Main results expectedJanuary 11, 2027
Study endsApril 11, 2027
Registry record updatedFebruary 28, 2024
Trial IDNCT06177041 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 to 75 with locally advanced unresectable or metastatic gastric or GEJ adenocarcinoma who have not received prior treatment and meet specific biomarker criteria.

Probably not a fit

Patients with HER2-positive tumors or those with a PD-L1 CPS of 5 or greater may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This phase 3, double-blind, randomized, placebo-controlled study aims to evaluate the efficacy and safety of the M108 monoclonal antibody combined with capecitabine and oxaliplatin (CAPOX) compared to a placebo plus CAPOX in patients with locally advanced unresectable or metastatic gastric or gastroesophageal junction adenocarcinoma. The study focuses on patients who are Claudin 18.2-positive, HER2-negative, and have a PD-L1 CPS of less than 5. Participants will be monitored for progression-free survival, safety, tolerability, pharmacokinetics, immunogenicity, and quality of life. The goal is to find a more effective first-line treatment option for this challenging cancer type.

Why it matters

Potential benefit: If successful, this treatment could provide a new effective option for patients with advanced gastric cancer, potentially improving survival rates and quality of life.

How similar studies have gone: Other studies have shown promise in targeting Claudin 18.2 in gastric cancer, but this specific combination approach is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Written informed consent
2. Histologically confirmed diagnosis of locally advanced unresectable or metastatic gastric/GEJ adenocarcinoma with no treatment previously. For patients with neoadjuvant/adjuant chemotherapy in the past, duration of last therapy to recurrence should be more than 6 months
3. At least 1 measurable site of the disease according to RECIST 1.1 criteria.
4. Positive CDLN 18.2 expression
5. Negative HER2 expression, PD-L1 CPS\<5
6. ECOG performance status (PS) 0-1
7. Life expectancy \> 3 months
8. Age ≥ 18 years and ≤75 years
9. Adequate haematological/ coagulation/ hepatic/ renal function
10. Men and women of childbearing age should agree to use effective contraception from the time they sign their informed consent until 3 months after the last dosing. Female subjects of childbearing age must have a negative blood beta-HCG test within 72 hours prior to first dosing.

Exclusion Criteria:

1. Previous radiotherapy within 4 weeks prior to the start of study treatment. (if palliative radiotherapy was given to bone metastases and the patient recovered from acute toxicity was allowed).
2. Previous anti-tumor therapy within 4 weeks prior to the start of study treatment.
3. Previous major operation within 4 weeks prior to the start of study treatment.
4. Have a prior severe allergic reaction or intolerance to known components of M108 monoclonal antibodies or other monoclonal antibodies (including humanized or chimeric antibodies); Allergic or intolerant to any component of capecitabine, oxaliplatin, etc.
5. Subject who has been treated with CLDN18.2 monoclonal/bispecific antibodies, CLDN18.2 CAR-T, CLDN18.2 ADC and any therapies that target CLDN18.2.
6. Subject who is in pregnant or in lactation period.
7. Other clinically significant disease which may have adversely affected the safe delivery of treatment within this study.

Where it's running

  • Beijing Cancer Hospital
    Beijing, Beijing Municipality, China
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.