Clinical trial NCT06028516: MRD Application in Colorectal Cancer Patients
Official title: ctDNA Monitoring Cancer Recurrence and Its Clinical Value in Solid Tumor
Study type: OBSERVATIONAL
Overall status: RECRUITING
Conditions: Colorectal Cancer
Surgery
Chemotherapy Effect
Lead sponsor: Shandong First Medical University
Sponsor class: OTHER
Collaborators: name: Jinan Central Hospital
First posted: 2023-09-08
Enrollment: 200
Sex: ALL
Minimum age (years): 30
Maximum age (years): 80
Standard ages: ADULT
OLDER_ADULT
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients with colorectal cancer and they were received routine laparoscopic surgery and regular chemotherapy.

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.

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.

Primary outcomes:
measure: ctDNA positive patients are detedcted before PET-CT
timeFrame: 2023.12.31
Secondary outcomes:
Other outcomes:
Locations:
city: Jinan
country: China
facility: Jinan central hospital affiliated to Shandong First Medical University
state: Shandong
Study officials:
affiliation: Shandong First Medical University
name: Tao Xu, PhD
role: STUDY_DIRECTOR
References:
citation: Zhou J, Wang C, Lin G, Xiao Y, Jia W, Xiao G, Liu Q, Wu B, Wu A, Qiu H, Zhang F, Hu K, Xue H, Shen Z, Wang Z, Han J, Niu B, Xu Y, Yu Z, Yang L. Serial Circulating Tumor DNA in Predicting and Monitoring the Effect of Neoadjuvant Chemoradiotherapy in Patients with Rectal Cancer: A Prospective Multicenter Study. Clin Cancer Res. 2021 Jan 1;27(1):301-310. doi: 10.1158/1078-0432.CCR-20-2299. Epub 2020 Oct 12.
citation: Chen G, Peng J, Xiao Q, Wu HX, Wu X, Wang F, Li L, Ding P, Zhao Q, Li Y, Wang D, Shao Y, Bao H, Pan Z, Ding KF, Cai S, Wang F, Xu RH. Postoperative circulating tumor DNA as markers of recurrence risk in stages II to III colorectal cancer. J Hematol Oncol. 2021 May 17;14(1):80. doi: 10.1186/s13045-021-01089-z.