Prospective patient stratification into robust cancer ‐cell intrinsic subtypes from colorectal cancer biopsies
In this study, we undertook a comprehensive assessment of the robustness of CRC transcriptional signatures, including CRIS and CMS, using a range of tumour sampling methodologies currently employed in clinical and translational research. These include analyses using (i) laser‐capture microdissected CRC tissue, (ii) eight publically available rectal cancer biopsy data sets (n=543), (iii) serial biopsies (from AXEBeam trial, NCT00828672; n=10), (iv) multi‐regional biopsies from colon tumours (n=29 biopsies, n=7 tumours) and (v) pre‐treatment biopsies from the phase II rectal cancer trial COPERNCIUS (NCT01263171; n=44). Compared to previous results obtained using CRC resection material, we demonstrate that CMS classification in biopsy tissue is significantly less capable of reliably classifying patient subtype (43% unknown in biopsy versus 13% unknown in resections, p=0.0001). In contrast, there was no significant difference in classification rate between biopsies and resections when using the CRIS classifier. Additionally, we demonstrated that CRIS provides significantly better spatially‐ and temporally‐ robust classification of molecular subtypes in CRC primary tumour tissue compared to CMS (p= 0.003 and p=0.02, respectively).
These findings have potential to inform ongoing biopsy‐based patient stratification in CRC, enabling robust and stable assignment of patients into clinically‐informative arms of prospective multi‐arm, multi‐stage clinical trials.
Source: The Journal of Pathology - Category: Pathology Authors: Matthew Alderdice, Susan D Richman, Simon Gollins, Peter Stewart, Chris Hurt, Richard Adams, Amy McCorry, Aideen Roddy, Dale Vimalachandran, Claudio Isella, Enzo Medico, Tim Maughan, Darragh G McArt, Mark Lawler, Philip D Dunne Tags: Original Paper Source Type: research
More News: Cancer | Cancer & Oncology | Clinical Trials | Colon Cancer | Colorectal Cancer | Legislation | Pathology | Rectal Cancers | Study