Circulating Tumor Cells and Circulating Tumor DNA Detection in Potentially Resectable Metastatic Colorectal Cancer: A Prospective Ancillary Study to the Unicancer Prodige-14 Trial.
Fiche publication
Date publication
mai 2019
Journal
Cells
Auteurs
Membres identifiés du Cancéropôle Est :
Pr BOUCHE Olivier, Pr GHIRINGHELLI François
Tous les auteurs :
Bidard FC, Kiavue N, Ychou M, Cabel L, Stern MH, Madic J, Saliou A, Rampanou A, Decraene C, Bouché O, Rivoire M, Ghiringhelli F, Francois E, Guimbaud R, Mineur L, Khemissa-Akouz F, Mazard T, Moussata D, Proudhon C, Pierga JY, Stanbury T, Thézenas S, Mariani P
Lien Pubmed
Résumé
The management of patients with colorectal cancer (CRC) and potentially resectable liver metastases (LM) requires quick assessment of mutational status and of response to pre-operative systemic therapy. In a prospective phase II trial (NCT01442935), we investigated the clinical validity of circulating tumor cell (CTC) and circulating tumor DNA (ctDNA) detection. CRC patients with potentially resectable LM were treated with first-line triplet or doublet chemotherapy combined with targeted therapy. CTC (Cellsearch) and Kirsten RAt Sarcoma (KRAS) ctDNA (droplet digital polymerase chain reaction (PCR)) levels were assessed at inclusion, after 4 weeks of therapy and before LM surgery. 153 patients were enrolled. The proportion of patients with high CTC counts (≥3 CTC/7.5mL) decreased during therapy: 19% (25/132) at baseline, 3% (3/108) at week 4 and 0/57 before surgery. ctDNA detection sensitivity at baseline was 91% (N=42/46) and also decreased during treatment. Interestingly, persistently detectable KRAS ctDNA (p=0.01) at 4 weeks was associated with a lower R0/R1 LM resection rate. Among patients who had a R0/R1 LM resection, those with detectable ctDNA levels before liver surgery had a shorter overall survival (p<0.001). In CRC patients with limited metastatic spread, ctDNA could be used as liquid biopsy tool. Therefore, ctDNA detection could help to select patients eligible for LM resection.
Mots clés
FOLFIRINOX, circulating tumor DNA, circulating tumor cells, liquid biopsy, metastatic colorectal cancer
Référence
Cells. 2019 May 28;8(6):