Gastric Cancer Clinical Trial
Official title:
Sintilimab Combined With Low-dose Radiation Therapy for Neoadjuvant Treatment of Locally Advanced Deficient Mismatch Repair/Microsatellite Instability-high Gastric Cancer: a Prospective, Multi-center, Single-arm, Phase Ib/II Clinical Trial
Recently, growing evidences have suggested that immunotherapy represents a promising treatment option for the neoadjuvant treatment of locally advanced mismatch repair-deficient (dMMR)/microsatellite instability-high (MSI-H) gastric cancer. In this study, we will explore the efficacy and safety of sintilimab and LDRT in the neoadjuvant treatment for locally advanced dMMR/MSI-H G/GEJ cancer.
This is a prospective, multicenter, single-arm, phase Ib/II trial. In the phase Ib, 4 cases will be enrolled in each treatment group. In the phase II study, a total of 33 patients will be enrolled. Eligible patients will be registered and receive four cycles of sintilimab. Simultaneously, LDRT will be planned and administered. Radical D2 gastric cancer resection will be performed 4-6 weeks after the last administration of sintilimab. The primary endpoint of phase Ib is to determine the optimal radiation dose for phase II study. The primary endpoint of phase II is the pathological complete response (pCR) rate. Secondary endpoints include R0 resection rate, major pathological response (MPR), objective response rate (ORR), 3-year event-free survival (EFS) rate, 3-year overall survival (OS) rate and safety profile of the neoadjuvant regimen. ;
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