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Clinical Trials/NCT07556640
NCT07556640
Recruiting
Phase 2

LM-302 and S-1 Plus Intraperitoneal Paclitaxel With or Without Cadonilimab for Claudin 18.2-positive Gastric Cancer With Peritoneal Metastasis: a Prospective, Exploratory Study

Ruijin Hospital1 site in 1 country74 target enrollmentStarted: April 17, 2026Last updated:

Overview

Phase
Phase 2
Status
Recruiting
Enrollment
74
Locations
1
Primary Endpoint
1-year survival rate

Overview

Brief Summary

In this study, the investigators will use LM-302 and S-1 plus intraperitoneal paclitaxel with or without Cadonilimab to treat Claudin 18.2-positive gastric or gastroesophageal junction adenocarcinoma with peritoneal metastasis.

Study Design

Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel
Primary Purpose
Treatment
Masking
None

Eligibility Criteria

Ages
18 Years to — (Adult, Older Adult)
Sex
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  • Histologically confirmed gastric or gastroesophageal junction adenocarcinoma with her 2 (-), and without the history of resection of primary or metastatic lesion;
  • Age ≥ 18 years at registration;
  • Peritoneal metastases from gastric cancer requiring definitive diagnosisby laparoscopy, and without gastric outflow tract obstruction andintestinal obstruction;
  • Claudin 18.2 positive (≥ 25%, moderate to strong staining);
  • Eastern Cooperative Oncology Group (ECOG) score ≤ 1;
  • Expected life expectancy \> 3 months;
  • Adequate bone marrow, liver, and renal functions.

Exclusion Criteria

  • Presence of distant metastases other than peritoneal metastasis at the time of enrollment;
  • Pregnant or breastfeeding women;
  • Prior treatment with Claudin 18.2 targeted therapy;
  • History of other malignancies within the past 5 years, except for cured skin cancer or cervical carcinoma in situ;
  • History of uncontrolled epilepsy, central nervous system disease, or mental disorder that, in the investigator's judgment, may interfere with signing informed consent or compliance with oral medication.
  • Clinically significant active heart disease, such as symptomatic coronary artery disease, New York Heart Association (NYHA) class II or higher congestive heart failure, severe arrhythmia requiring medication, or myocardial infarction within the past 12 months;
  • Upper gastrointestinal obstruction, abnormal physiological function, or malabsorption syndrome that may affect S 1 absorption;
  • Known peripheral neuropathy ≥ NCI CTC AE grade
  • However, patients with loss of deep tendon reflexes (DTR) alone may be included;
  • Organ transplantation requiring immunosuppressive therapy;

Arms & Interventions

LM-302 and S-1 Plus Intraperitoneal Paclitaxel

Experimental

Intervention: LM-302, S-1, paclitaxel (Drug)

LM-302 and S-1 Plus Intraperitoneal Paclitaxel combined with Cadonilimab

Active Comparator

Intervention: LM-302, Cadonilimab, S-1, paclitaxel (Drug)

Outcomes

Primary Outcomes

1-year survival rate

Time Frame: up to 24 months

Secondary Outcomes

  • treatment related adverse events(up to 24 months)
  • Progressive free survival (PFS)(up to 36 months)
  • Overall survival (OS)(up to 36 months)
  • Disease control rate (DCR)(up to 24 months)
  • Objective response rate (ORR)(up to 24 months)
  • Major Pathological Response (MPR) rate(up to 24 months)

Investigators

Sponsor Class
Other
Responsible Party
Principal Investigator
Principal Investigator

Zhongyin Yang, MD., PhD

Doctor

Ruijin Hospital

Study Sites (1)

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