A Study on the Efficacy of Sodium Propionate Combined With Anti-PD-1 Immunotherapy in Gastric Cancer (PAPGC)

May 25, 2026 updated by: Wang Xinying, Jinling Hospital, China

Sodium Propionate Combined With Anti-PD-1 Immunotherapy on Tumor Efficacy in Gastric Cancer Patients

Eligible patients were randomized into two groups: the sodium propionate group and the control group. In the control group, patients received placebo combined with anti-PD-1 therapy plus chemotherapy without additional sodium propionate intervention. In the sodium propionate group, on the basis of anti-PD-1 therapy combined with chemotherapy, patients were additionally administered oral sodium propionate capsules at a dose of 500 mg (1 capsule) twice weekly, with a total intervention duration of 12 weeks. The primary and secondary outcome indicators will be collected for subsequent analysis.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Detailed Description

Eligible patients with unresectable gastric cancer were randomly assigned to either the sodium propionate group or the control group. In the control group, patients received placebo combined with anti-PD-1 therapy and chemotherapy, without additional sodium propionate intervention. In the sodium propionate group, on the basis of anti-PD-1 therapy combined with chemotherapy, patients were additionally given oral sodium propionate capsules at a dose of 500 mg per capsule, one capsule twice a week, for a total intervention period of 12 weeks. Relevant primary and secondary outcome measures will be collected for further analysis.

Study Type

Interventional

Enrollment (Estimated)

20

Phase

  • Not Applicable

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 Locations

  • China
    • Jiangsu
      • Nanjing, Jiangsu, China, 210002

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

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Subjects voluntarily participated in the trial and signed the informed consent form;
  • Aged ≥ 18 years and < 80 years, regardless of gender;
  • Stable vital signs;
  • Patients with gastric adenocarcinoma confirmed by gastroscopic biopsy;
  • Tumors judged as unresectable by attending physicians;
  • Receiving anti-PD-1 therapy combined with chemotherapy as first-line treatment;
  • No history of allergic diseases and non-allergic constitution;
  • No history of drug abuse;
  • Non-pregnant and non-lactating females (applicable to male subjects as well);
  • No participation in any drug clinical trial (including investigational drugs of this trial) within 3 months prior to enrollment.

Exclusion Criteria:

  • Failure to meet the inclusion criteria, or individuals deemed inappropriate for trial participation by investigators;
  • Concurrent primary malignant tumors at other sites;
  • Poor general condition, severe infection, respiratory insufficiency, or other conditions leading to inability to cooperate with the trial;
  • Patients with mental disorders, consciousness disturbance, or poor treatment compliance;
  • Suspected or confirmed history of drug abuse;
  • Immunodeficiency, or long-term use of immunosuppressants and glucocorticoids;
  • Pregnant or lactating women;
  • Sponsors, investigators directly involved in this trial, and their immediate family members;
  • Individuals unsuitable for enrollment for any reason as judged by the investigator.

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: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
No Intervention: Control
patients received placebo combined with anti-PD-1 therapy and chemotherapy, without additional sodium propionate intervention.
Experimental: Sodium propionate
on the basis of anti-PD-1 therapy combined with chemotherapy, patients were additionally given oral sodium propionate capsules at a dose of 500 mg per capsule, one capsule twice a week, for a total intervention period of 12 weeks.
Dietary supplement: Sodium propionate
on the basis of anti-PD-1 therapy combined with chemotherapy, patients were additionally given oral sodium propionate capsules at a dose of 500 mg per capsule, one capsule twice a week, for a total intervention period of 12 weeks.
Other Names:
  • Propionic acid

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Response to treatment for gastric cancer
Time Frame: up to 12 weeks
Tumor responses in patients with gastric cancer after corresponding treatment were evaluated in accordance with the Response Evaluation Criteria in Solid Tumors (RECIST 1.1).
up to 12 weeks

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Tumor markers
Time Frame: up to 12 weeks
Serum levels of CEA in ng/mL, CA19-9 in U/mL, CA72-4 in U/mL, AFP in ng/mL and CA125 in U/mL were routinely measured in patients on a monthly basis.
up to 12 weeks
Patient survival
Time Frame: From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 12 months.
Follow up on the survival status of patients
From date of randomization until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 12 months.

Collaborators and Investigators

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

Sponsor

Jinling Hospital, China

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

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 (Estimated)

May 30, 2026

Primary Completion (Estimated)

August 30, 2026

Study Completion (Estimated)

August 30, 2027

Study Registration Dates

First Submitted

April 22, 2026

First Submitted That Met QC Criteria

May 25, 2026

First Posted (Actual)

May 29, 2026

Study Record Updates

Last Update Posted (Actual)

May 29, 2026

Last Update Submitted That Met QC Criteria

May 25, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 20260422

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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