NCT06742411

XELOX Combined With Sintilimab and HBO for Advanced or Metastatic GC/GEJC

A Phase Ib/II Clinical Trial of the XELOX Regimen Combined With Sintilimab and Hyperbaric Oxygen Therapy for the Treatment of Advanced or Metastatic Gastric and Gastroesophageal Junction Adenocarcinoma

• Status: Recruiting
• Phase: Phase 1 / Phase 2
• Study type: Interventional
• Enrollment: 57 (estimated)
• Sponsor: West China Hospital · Academic / Other
• Sex: All
• Age: 18 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

This study investigates the efficacy and safety of XELOX chemotherapy combined with sintilimab and hyperbaric oxygen therapy (HBOT) as a first-line treatment for patients with Advanced or Metastatic gastric and gastroesophageal junction adenocarcinoma. The trial comprises two phases: a phase Ib study to determine the optimal HBOT regimen and assess safety and tolerability, followed by a phase II study to evaluate the overall response rate (ORR). Secondary outcomes include progression-free survival (PFS), disease control rate (DCR), 2-year disease-free survival (DFS), 2-year overall survival (OS), safety, and quality of life. This study aims to provide a novel approach for enhancing therapeutic efficacy and improving patient outcomes by leveraging HBOT to address tumor hypoxia and augment the effects of chemotherapy and immune checkpoint inhibitors.

Detailed description

This is a prospective, single-arm, phase Ib/II clinical trial designed to evaluate the safety and efficacy of the XELOX regimen combined with sintilimab and hyperbaric oxygen therapy (HBOT) in patients with Advanced or Metastatic gastric and gastroesophageal junction adenocarcinoma. In the phase Ib portion, 9 patients will be enrolled to identify the optimal HBOT protocol and assess the safety and tolerability of the combined treatment. The dose and schedule of HBOT will be refined based on observed safety data and adverse events. In the phase II portion, approximately 48 patients will be enrolled to further evaluate the efficacy of the XELOX plus sintilimab and HBOT combination. Patients will receive treatment in 3-week cycles, with HBOT administered alongside chemotherapy and immunotherapy. The primary endpoint of the phase II study is the overall response rate (ORR) assessed per RECIST 1.1 criteria.Secondary endpoints include progression-free survival (PFS), disease control rate (DCR), 2-year disease-free survival (DFS), 2-year overall survival (OS), safety profile, and patient-reported outcomes related to quality of life. Exploratory endpoints will focus on biomarker analysis and the role of HBOT in modulating tumor hypoxia.This study aims to explore whether HBOT can enhance the efficacy of chemotherapy and immunotherapy by addressing tumor hypoxia, a known factor contributing to therapy resistance in gastric and gastroesophageal junction cancers. The findings from this trial may provide insights into a novel multimodal treatment strategy for improving patient outcomes in advanced disease settings.

Conditions

• Gastric (Stomach) Cancer

Interventions

Type	Name	Description
DRUG	XELOX+Sintilimab+HBOT	Patients will receive the XELOX regimen, consisting of oxaliplatin (130 mg/m² IV on Day 1) and capecitabine (1000 mg/m² orally twice daily for 14 days, repeated every 3 weeks), combined with sintilimab (200 mg IV on Day 1 every 3 weeks) and hyperbaric oxygen therapy (HBOT) administered alongside the XELOX regimen. Treatment will be administered for 4 to 6 cycles. Following the initial treatment phase, patients will be evaluated for response. If disease progression is observed, patients will exit the study and receive subsequent treatments as deemed appropriate. For patients with stable disease or a response to therapy, maintenance treatment with capecitabine and sintilimab will continue until the occurrence of a study endpoint or other specified criteria.

Timeline

• Start date: 2024-12-31
• Primary completion: 2026-12-31
• Completion: 2026-12-31
• First posted: 2024-12-19
• Last updated: 2025-05-07

Locations

2 sites across 1 country: China