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The Efficacy and Safety of Chemotherapy Combined With Cadonilimab (AK104) in Neoadjuvant Treatment of Locally Advanced Gastric Cancer/Gastroesophageal Junction Adenocarcinoma: A Prospective, Single-arm, Phase II Clinical Study

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What is being tested

S-1, Oxaliplatin, Cadonilimab

Drug
Who is being recruted

Digestive System Diseases+5

+ Digestive System Neoplasms

+ Gastrointestinal Diseases

From 18 to 75 Years
+39 Eligibility Criteria
See all eligibility criteria
How is the trial designed

Treatment Study

Phase 2
Interventional
Study Start: July 2023
See protocol details

Summary

Principal SponsorSichuan University
Study ContactJiankun Hu, M.DMore contacts
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: July 1, 2023

Actual date on which the first participant was enrolled.

Recent years, neoadjuvant therapy have emerged as a promising treatment option for the treatment of locally advanced gastric or gastroesophageal adenocarcinoma. However, the efficacy of current neoadjuvant regimens is still unsatisfactory. Novel treatment with higher efficacy and safety are urgently needed. Recently, immunotherapy has achieved significant therapeutic effects in the treatment of a series of cancers, and chemotherapy combined with immunotherapy has been recommended as the standard first-line treatment for gastric cancer. Moreover, several phase I/II studies have explored the efficacy and safety of chemotherapy combined with PD-1 inhibitor in the neoadjuvant treatment for gastric cancer, the results of which indicate that chemotherapy combined with immunotherapy can significantly improve the pCR rate and R0 resection rate of gastric cancer. In this study, we will evaluate the efficacy and safety of chemotherapy combined with Cadonilimab（AK104） (a PD-1/CTLA-4 bispecific antibody) in the neoadjuvant therapy for resectable locally advanced gastric or gastroesophageal adenocarcinoma.

Official TitleThe Efficacy and Safety of Chemotherapy Combined With Cadonilimab (AK104) in Neoadjuvant Treatment of Locally Advanced Gastric Cancer/Gastroesophageal Junction Adenocarcinoma: A Prospective, Single-arm, Phase II Clinical Study
NCT05948449
Principal SponsorSichuan University
Study ContactJiankun Hu, M.DMore contacts
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

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

37 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.

Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 18 to 75 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Digestive System DiseasesDigestive System NeoplasmsGastrointestinal DiseasesGastrointestinal NeoplasmsNeoplasmsNeoplasms by SiteStomach DiseasesStomach Neoplasms

Criteria

9 inclusion criteria required to participate
Age 18-75 years.
Histologically or cytologically confirmed diagnosis of adenocarcinoma locate at gastroesophageal junction or stomach, advanced gastric or gastroesophageal junction cancer as assessed by ultrasonography and/or CT/MRI (cT3-T4a, N+, M0).
Resectable gastric or gastroesophageal cancer, judged by surgeons in this study.
No previous anti-tumor treatment.
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30 exclusion criteria prevent from participating
Unable to comply with the research program or procedures.
Undergoing other drug clinical trials, or has participated in any drug clinical trials one month before enrollment.
Active autoimmune disease or history of refractory autoimmune disease.
Receiving corticosteroid (> 10mg/d prednisone or equivalent dose of steroids) or other systematic immunosuppression therapies within 14 days before enrollment, excluding following therapies: steroid hormone replacement therapy (≤10mg/d); local steroid therapy; short-term, prophylactic steroid therapy for preventing allergies or nausea and vomiting.
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Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

One single intervention group is designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Experimental
3 cycles of neoadjuvant therapy: S-1: 40\~60mg Bid，d1\~14, q3w Oxaliplatin：130mg/m2，iv drip，d1, q3w Cadonilimab（AK104）:10mg/Kg,iv drip,d1,q3w

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.
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SuspendedNo study centers