Skip to content

First-line Treatment With RC48 Plus Sintilimab and S-1 in Advanced Gastric Cancer (RCTS2)

A Phase II, Open-Label, Multicenter Trial Comparing Disitamab Vedotin Plus Sintilimab and S-1 With Trastuzumab Plus Chemotherapy ± Sintilimab for First-Line Treatment of HER2-Positive Advanced Gastric or Gastroesophageal Junction Adenocarcinoma (RCTS2)

Status
Recruiting
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06730373
Enrollment
110
Registered
2024-12-12
Start date
2024-10-17
Completion date
2027-12-31
Last updated
2026-09-15

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

Conditions

HER2-positive Gastric Cancer, Metastatic Gastric Cancer, Unresectable Gastric Carcinoma

Brief summary

This is a Phase II, randomized, multicenter, open-label clinical trial designed to compare Disitamab Vedotin plus Sintilimab and S-1 with Trastuzumab plus chemotherapy ± Sintilimab for first-line treatment of HER2-Positive advanced gastric or gastroesophageal junction adenocarcinoma.

Interventions

DRUGDisitamab Vedotin

2.5 mg/kg IV every 3 weeks

DRUGSintilimab

200 mg IV every 3 weeks

DRUGS-1

40-60 mg BID for 14 days, every 3 weeks

DRUGTrastuzumab

First load dose is 8.0mg/kg , then 6.0 mg/kg IV every 3 weeks

DRUGOxaliplatin

130 mg/m2 Q3W

DRUGCapecitabine

1000 mg/m² Q3W

DRUG5-FU

800 mg/m²

DRUGCisplatin

80 mg/m²

Sponsors

Qilu Hospital of Shandong University
Lead SponsorOTHER

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

1. Aged18-80 years, gender is not limited; 2. Pathologically confirmed locally advanced gastric or gastroesophageal junction adenocarcinoma that is inoperable or has distant metastasis; 3. HER2-Positive (IHC3+or IHC2+/FISH+) ; 4. Has at least 1 measurable lesion as determined by RECIST 1.1; 5. There is no systematic treatment in the past, or the patient has received neoadjuvant/adjuvant chemotherapy, but the disease progresses or relapses more than 6 months after the end of treatment; 6. Eastern Cooperative Oncology Group (ECOG) performance status of 0-1; 7. Adequate organ function; 8. The life expectancy is at least 3 months;

Exclusion criteria

1. Allergy to any trial drug and its excipients, or serious allergy history, or contraindication of the trial drug; 2. Cardiovascular and cerebrovascular events that are not well controlled; 3. Has received systematic treatment with Chinese patent medicine or immunomodulatory drugs (including thymosin, interferon, interleukin, except for local use for ascites control) before the first administration within 2 weeks. 4. Have a history of interstitial lung disease, non-infectious pneumonia, pulmonary fibrosis, acute lung disease, or systemic disease with poor control (including but not limited to diabetes, hypertension, etc.); 5. Have a history of active immune deficiency or autoimmune diseases, including HIV positive test, or have other acquired or congenital immune deficiency diseases, or have a history of organ transplantation or autoimmune diseases; 6. Severe chronic or active infection requires systemic antibacterial, antifungal or antiviral treatment, including tuberculosis infection.Have a history of active tuberculosis infection ≥ 1 year before recruitment should also be excluded, unless proved has been completed appropriate treatment; 7. Brain metastasis or leptomeningeal metastasis; 8. Clinically significant pleural effusion, pericardial effusion or ascites should be drained for many times within 2 weeks before the first administration of the trial drug; 9. Has a second clinically detectable primary malignant tumor at the time of recruitment, or there were other malignant tumors in the past 5 years (except for fully treated skin basal cell carcinoma or cervical carcinoma in situ); 10. Any major surgery was performed ≤ 28 days before the first trial drug administration; 11. History of allogeneic stem cell transplantation or organ transplantation;

Design outcomes

Primary

MeasureTime frameDescription
Objective remission rate (ORR)6 months after the last subject participating inThe proportion of subjects with complete response (CR) and partial response (PR) in total subjects

Secondary

MeasureTime frameDescription
Progression-free survival (PFS)12 months after the last subject participating inProgression-free survival (PFS) refers to the time from the date of randomization to the first researcher's evaluation of disease progression or death (calculated by the event that occurred first). The disease progression will be evaluated by the researchers according to the RECIST 1.1 standard.
Overall survival (OS)12 months after the last subject participating inOverall survival (OS) refers to the time from the date of randomization to the date of death of the subject.
Duration of relief (DOR)12 months after the last subject participating inDOR is defined as the time from the first documented objective response (CR or PR) to the first documented disease progression or death
Disease control rate (DCR)6 months after the last subject participating inThe proportion of subjects with complete response (CR) and partial response (PR) and stable disease(SD)in total subjects
Safety(adverse event)Up to approximately 2 yearsto evaluate safety including adverse event rate and adverse event grade.

Countries

China

Contacts

CONTACTLian Liu, MD
tounao@126.com0531-82169851
CONTACTSong Li, MD
0531-82169851
STUDY_CHAIRLian Liu, MD

Qilu Hospital of Shandong University

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 16, 2026