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A Study of Disitamab Vedotin Combined With Tislelizumab and Chemotherapy Versus Tislelizumab Combined With Chemotherapy in HER2-Low Advanced Gastric or Gastroesophageal Junction Adenocarcinoma

A Phase III, Randomized Trial Comparing RC48 Plus Chemotherapy and Tislelizumab With Tislelizumab Plus Chemotherapy as First-line Treatment in Participants With HER2 Low Advanced Gastric or Gastrioesophageal Junction Adenocarcinoma (RC48-C039)

Status
Not yet recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06944496
Enrollment
616
Registered
2025-04-25
Start date
2025-05-15
Completion date
2030-05-15
Last updated
2025-04-25

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Gastric Carcinoma

Brief summary

The purpose of this study is to evaluate the efficacy and safety of \*\*Disitamab Vedotin combined with Tislelizumab and CAPOX versus Tislelizumab combined with CAPOX\*\* as first-line treatment for patients with HER2-low advanced gastric or gastroesophageal junction adenocarcinoma.

Interventions

BIOLOGICALDisitamab Vedotin+Tislelizumab+Oxaliplatin+Capecitabine

Disitamab Vedotin: 2.5 mg/kg, IV, D1, Q2W; Tislelizumab: 200 mg, IV, D1, Q3W Oxaliplatin: 100 mg/m², IV, D1, Q3W; Capecitabine: 750 mg/m², po, BID, D1-D14, Q3W

Tislelizumab: 200 mg, IV, D1, Q3W Oxaliplatin: 130 mg/m², IV, D1, Q3W; Capecitabine: 1000 mg/m², po, BID, D1-D14, Q3W

Sponsors

RemeGen Co., Ltd.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No

Inclusion criteria

* Voluntarily consent to participate in the study and sign the informed consent form * Expected survival period \>12 weeks * ECOG Performance Status 0 or 1 * Histologically confirmed unresectable locally advanced, metastatic, or recurrent gastric or gastroesophageal junction adenocarcinoma * No prior systemic therapy for locally advanced or metastatic gastric cancer * HER2-low expression * At least one assessable lesion according to RECIST v1.1 criteria * Adequate organ function * For female subjects: They should be surgically sterilized, postmenopausal, or agree to use a medically approved contraceptive method (such as an intrauterine device, contraceptive pill, or condom) during the study treatment period and for 6 months after the end of the study treatment. A blood pregnancy test must be negative within 7 days before the study medication is administered, and they must not be breastfeeding * For male subjects: They should be surgically sterilized or agree to use a medically approved contraceptive method during the study treatment period and for 6 months after the end of the study treatment * Able to understand the study requirements and willing to comply with the study and follow-up procedures

Exclusion criteria

* Presence of central nervous system (CNS) metastasis and/or carcinomatous meningitis * Peripheral neuropathy \> Grade 1 * Tumor lesions with a tendency to bleed * Uncontrolled diarrhea * Bone metastases with a risk of paraplegia * Past or current interstitial lung disease, or presence of drug-induced pneumonia, radiation pneumonia, or severely impaired lung function * Other malignancies within 5 years before the first dose, except for those expected to be cured with treatment (e.g., adequately treated thyroid cancer, cervical carcinoma in situ, basal or squamous cell skin cancer, or ductal carcinoma in situ of the breast treated with curative surgery) * Pregnant or breastfeeding women

Design outcomes

Primary

MeasureTime frame
Progression-Free Survival24 months

Secondary

MeasureTime frame
Objective Response Rate24 months
Disease Control Rate24 months
Overall Survivalup to 5 years
Patient-Reported Outcomes24 months
Adverse Events24 months
Duration of Response24 months

Countries

China

Contacts

Primary ContactSU Xiaohong Study Director, M.D
xiaohong.su@remegen.cn+0810-65391479

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026