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Clinical Trial Summary

In North America, colorectal cancer patients with resectable liver-restricted metastases (mCRC-LR) are treated with approximately 6 months of preoperative systemic multi-agent chemotherapy. Actuarial data however supports that approximately 20% of mCRC-LR patients can be cured without as much systemic chemotherapy. Prospective phase II-III trials also support that awaiting recurrence to initiate further metastases-targeted or systemic treatment may provide patients with longer overall survival while avoiding toxicities in those without recurrence.

Clinical Trial Description

The general objective of this single-centre, prospective observational cohort study in 100 mCRC-LR patients treated with curative intent along standard of care (SOC), is to obtain real-world data on administered therapies, selected complications, and oncological outcomes, while longitudinally collecting biospecimens to enable correlative research investigating early biological markers of treatment resistance and recurrence. Cryopreservation of sequential blood derivatives, tumor tissue, and stool samples will allow investigation of circulating tumor DNA (ctDNA), T-cell receptor repertoire, somatic cancer mutations, immune and other gene expression, gut microbiome, and soluble factors. The first biological marker that will be investigated in correlative research will be longitudinal measurements of ctDNA targeting 30 oncogenes, 23 axons, and 146 hotspots (Follow It assay, Canexia Health). Additional biological markers will be defined in subsequent amendments to this protocol. The results are expected to provide important insights for the design of future trials investigating ways to personalize therapy, such as to: a) avoid the unnecessary use of neoadjuvant or adjuvant systemic chemotherapy, b) avoid morbid hepatectomies in patients unlikely to benefit, c) test novel preoperative therapies in patients more likely to benefit, and d) modulate the intensity of follow-up. ;

Study Design

Related Conditions & MeSH terms

NCT number NCT05068531
Study type Observational
Source Centre hospitalier de l'Université de Montréal (CHUM)
Contact Wiam Belkaid, PhD
Phone 514-890-8000
Email [email protected]
Status Not yet recruiting
Start date October 2021
Completion date October 2026

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