ctDNA Monitoring Cancer Recurrence and Its Clinical Value in Solid Tumor
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Colorectal Cancer
- Sponsor
- Shandong First Medical University
- Enrollment
- 200
- Locations
- 1
- Primary Endpoint
- ctDNA positive patients are detedcted before PET-CT
- Status
- Recruiting
- Last Updated
- 2 years ago
Overview
Brief Summary
We first collect tumor tissue and adjacent tissue to peform the WES sequencing, then collect blood after postoperative surgery 1, 3. 6, 9, 12, 18, 24 month to detect ctDNA.
Detailed Description
ctDNA is obtained from plasma rather than serum, as the latter contains more DNA released from immune cells during clotting. Blood should be drawn into a K2EDTA or cell stabilization tube (e.g., Streck cfDNA collection tube). Plasma isolation should be performed as soon as possible, no later than 24 hours, using K2EDTA (preferably within 4-6 hours) and, if using cell stabilization tubes, within 2-7 days, temporarily stored at 4°C. Sample disposal procedure: collect whole anticoagulated blood, gently invert to fully anticoagulate, plasma fractionation should be performed as soon as possible, no later than 24 hours, temporarily stored at 4°C using K2EDTA (preferably within 4-6 hours), and stored at -80°C for long term. The collected anticoagulant blood is placed in an ice box containing ice packs and transported vertically to a centrifugable laboratory. Centrifuge at 3000 rpm at 4°C for 15 min, take the upper layer, and aliquot 0.5 mL/tube into 1.5 mL centrifuge tubes. Cryopreserved at -80 °C, 1 mL of whole blood yields approximately 0.5 mL of plasma.
Investigators
Eligibility Criteria
Inclusion Criteria
- •(1) Patients with colorectal tumors, whose clinical symptoms meet the diagnostic criteria of colon cancer in my country, and pathologically diagnosed as colorectal cancer after surgery; (2) patients with stage II-III colorectal cancer; (3) aged 30-80 years; (4) All underwent conventional radiotherapy and chemotherapy after operation; (5) Complete clinical data and follow-up records were available.
Exclusion Criteria
- •(1) Other serious diseases (cardiovascular and cerebrovascular diseases, kidney diseases, etc.) before operation; (2) Combined with multiple primary colorectal cancers; (3) Patients with other malignant tumors within the past 5 years; (4) Combined with digestive tract Obstruction, perforation, bleeding and other indications for emergency surgery.
Outcomes
Primary Outcomes
ctDNA positive patients are detedcted before PET-CT
Time Frame: 2023.12.31
multiple PCR based on the WES results