RC48-ADC Combined With S-1 for First-line Treatment of Advanced Gastroesophageal Adenocarcinoma With Moderate Expression of HER2

Phase 1

Recruiting

• Conditions: Advanced Gastroesophageal Adenocarcinoma
• Interventions: Drug: RC48-ADC; Drug: S-1

• Registration Number: NCT05403242
• Lead Sponsor: Chinese PLA General Hospital

Brief Summary

This study was a single-arm, open, multi-center Phase Ib/II clinical trial to observe and evaluate the efficacy and safety of RC48-ADC plus S-1 in first-line treatment of advanced gastroesophageal adenocarcinoma with moderate expression of HER2.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2022-05-06
• Study First Submitted QC: 2022-05-30
• Study First Posted: 2022-06-03
• Study Start: 2022-09-20
• Status Verified: 2024-01
• Last Update Submitted: 2024-01-04
• Last Update Posted: 2024-01-08
• Primary Completion: 2025-09
• Study Completion: 2026-09

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 42

Inclusion Criteria

• At the same time, patients voluntarily participated in the study and signed informed consent;
• Either male or female, aged 18 or older;
• Patients diagnosed by pathological or cytological diagnosis of gastric cancer (GC), gastroesophageal junction carcinoma (GEJ) or esophageal adenocarcinoma had evidence of local advanced lesions or metastases that could not be surgically resected, and were mostly adenocarcinoma confirmed by histological examination;
• No previous systemic therapy; Or had received neoadjuvant/adjuvant chemotherapy but experienced disease progression or recurrence 6 months after the end of treatment;
• HER2 IHC 2+ and FISH-;
• ECOG scores 0-1;
• Estimated survival ≥3 months;
• Women of reproductive age had to undergo a pregnancy test (serum or urine) which was negative within 7 days of enrollment, and volunteer to use an appropriate method of contraception during the observation period and for 12 weeks after the last study drug was given. For men, surgical sterilization or consent to use appropriate methods of contraception during the observation period and for 12 weeks after the last administration of the study drug;
• Patients who comply are expected to be able to follow up on therapeutic outcomes and adverse reactions as required by the regimen.

Exclusion Criteria

• Five years before first use of the study drug has been diagnosed as other malignant tumor, the effective treatment of basal cell carcinoma, squamous cell carcinoma of the skin and/or the effective removal of cervical cancer in situ and/or except breast cancer;
• Known hypersensitivity to RC48-ADC;
• HBV DNA>500 IU/ mL (or 2000 copies /ml), HCV RNA>103 copies /ml, HBsAg+ and anti-HCV antibody positive;
• History of HIV infection;
• History of receiving any anti-cancer drug/biologic treatment within 4 weeks prior to trial treatment;
• Assessed by the investigator to be unable or unwilling to comply with the requirements of the protocol.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
RC48-ADC Combined With S-1	S-1	-
RC48-ADC Combined With S-1	RC48-ADC	-

Primary Outcome Measures

Name	Time	Method
dose-limiting toxity	through study completion, an average of 1 year
ORR（Objective Response Rate）	Imaging tests were performed every 6 weeks (±7 days) from the first year of treatment to assess efficacy, and every 8 weeks (±7 days) after 1 year	The proportion of patients whose tumors shrink by a certain amount and remain so for a certain amount of time, including CR+PR cases.

Secondary Outcome Measures

Name	Time	Method
PFS(progression-free survival)	Imaging tests were performed every 8 weeks (±7 days) from the first year of treatment to assess efficacy, and every 7 weeks (±7 days) after 1 year	Time from randomness to the first occurrence of disease progression or death from any cause.
DOR(Duration of Response )	Imaging tests were performed every 6 weeks (±7 days) from the first year of treatment to assess efficacy, and every 8 weeks (±7 days) after 1 year	DOR is defined as the time from the first documented objective response (CR or PR) to the first documented disease progression or death
AE(Adverse Event)	Up to 2 years	The drug safety was assessed by investigator(s) according to NCI-CTCAE v5.0
OS(Overall Survival)	From date of randomization until the date of death from any cause, assessed up to 24 months	Time from randomization to death from any cause

Trial Locations

Locations (2)

Chinese PLA General Hospital; 🇨🇳 Beijing, China

Beijing Friendship Hospital; 🇨🇳 Beijing, China