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

April 24, 2026 updated by: Zhongyin Yang, MD., PhD, Ruijin Hospital

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

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 Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
74

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • China
    • Huangpu District
      • Shanghai, Huangpu District, China, 200025
        • Recruiting
        • Ruijin Hospital Shanghai Jiao Tong University School of Medicine
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

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 1. However, patients with loss of deep tendon reflexes (DTR) alone may be included;
  • Organ transplantation requiring immunosuppressive therapy;
  • Severe uncontrolled recurrent infection or other severe uncontrolled concomitant diseases;
  • Moderate or severe renal impairment (creatinine clearance ≤ 50 ml/min) or serum creatinine above the upper limit of normal;
  • Known dihydropyrimidine dehydrogenase (DPD) deficiency;
  • Active hepatitis (for hepatitis B: HBsAg positive and HBV DNA ≥ 500 IU/ml; for hepatitis C: HCV antibody positive and HCV viral load > upper limit of normal);
  • Psychiatric disorder that makes the patient unable to comply with treatment;
  • Allergy to paclitaxel or any component of the study drugs;
  • History or evidence of any disease, condition, treatment, or laboratory abnormality that could interfere with the study results or the patient's full participation, or any other condition that, in the investigator's opinion, makes the patient unsuitable for enrollment.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: LM-302 and S-1 Plus Intraperitoneal Paclitaxel
Drug: LM-302, S-1, paclitaxel
LM-302 2.0mg/kg intravenous (IV) infusion on day 1, paclitaxel 20 mg/m2 intraperitoneal infusion on Days 1 and 8 plus oral S-1: BSA<1.25 m2, 40mg twice/day; BSA1.25-1.5m2, 50mg twice/day; BSA≥1.5 m2, 60mg twice/day, po, d1-14, q3w.
Active Comparator: LM-302 and S-1 Plus Intraperitoneal Paclitaxel combined with Cadonilimab
Drug: LM-302, Cadonilimab, S-1, paclitaxel
LM-302 2.0 mg/kg, Cadonilimab 10mg/kg intravenous (IV) infusion on day 1, paclitaxel 20 mg/m2 intraperitoneal infusion on Days 1 and 8 plus oral S-1: BSA<1.25 m2, 40mg twice/day; BSA1.25-1.5m2, 50mg twice/day; BSA≥1.5 m2, 60mg twice/day, po, d1-14, q3w.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
1-year survival rate
Time Frame: up to 24 months
up to 24 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Overall survival (OS)
Time Frame: up to 36 months
up to 36 months
treatment related adverse events
Time Frame: up to 24 months
up to 24 months
Progressive free survival (PFS)
Time Frame: up to 36 months
Progression-free survival (PFS) is defined as the time from enrollemnt to disease progression or death from any cause.
up to 36 months
Disease control rate (DCR)
Time Frame: up to 24 months
up to 24 months
Objective response rate (ORR)
Time Frame: up to 24 months
ORR is defined as the proportion of subjects in the analysis population who achieve confirmed objective response (CR or PR) as assessed by the IRRC per RECIST v1.1 criteria.
up to 24 months
Major Pathological Response (MPR) rate
Time Frame: up to 24 months
Defined as tumor specimens resected after conversion surgery with residual tumor cells ≤10%
up to 24 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Ruijin Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 17, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 30, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
April 30, 2029

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
April 17, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 24, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 29, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
April 29, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 24, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
April 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • DRAGON-17

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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