NCT06608537

A Clinical Study Based on FAPI-PET/CT Technology to Predict Pathological Complete Response After Neoadjuvant Chemoradiotherapy for MSS Rectal Cancer

A Single-center, Single-arm Phase II Clinical Study Based on FAPI-PET/CT Technology to Predict Pathological Complete Response After Neoadjuvant Chemoradiotherapy for MSS Rectal Cancer

• Status: Completed
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 52 (actual)
• Sponsor: Sun Yat-sen University · Academic / Other
• Sex: All
• Age: 18 Years – 75 Years
• Healthy volunteers: Not accepted

Summary

The combination of short course radiotherapy and immunotherapy helps to increase the proportion of pathological complete response after neoadjuvant therapy, providing more patients with the opportunity for organ preservation. However, there is no accurate and unified cCR diagnostic standard in the world. As a new radiotracer, 18F-FAPI has been developed and used to target fibroblast activating protein and tumor matrix visualization, which has the advantages of low background uptake, high contrast, few preparation requirements, short post-injection interval, and no influence on blood glucose. Therefore, we will invite you to participate in a clinical study to explore whether the PET parameters of 18F-FDG and 18F-FAPI-42 PET/CT can be used to predict pathological responses after neoadjuvant therapy for locally advanced rectal cancer (LARC). The findings will help improve future treatment stratification of LARC, help patients preserve organs and improve quality of life.

Conditions

• Rectal Cancer

Interventions

Type	Name	Description
DRUG	neoadjuvant SCRT followed by Sintilimab plus CAPOX	Patientsreceived neoadjuvant treatment consisting of SCRT (a total of 25 Gy in 5 days) followed by sintilimab (3mg/kg intravenous drip on day 1; every 3-week cycle for two cycles) combined with CAPOX (oxaliplatin 130 mg/m2 intravenous infusion over 2 h on day 1, capecitabine 1000 mg/m2 orally twice daily from day 1-14, in every 3-week cycle for two cycles) 1 week later.

Timeline

• Start date: 2024-12-01
• Primary completion: 2025-07-30
• Completion: 2025-12-30
• First posted: 2024-09-23
• Last updated: 2026-03-04

Locations

1 site across 1 country: China