Genetic and microenvironmental intra-tumor heterogeneity impacts colorectal cancer evolution and metastatic development

Daniel Sobral, Marta Martins, Shannon Kaplan, Mahdi Golkaram, Michael Salmans, Nafeesa Khan, Raakhee Vijayaraghavan, Sandra Casimiro, Afonso Fernandes, Paula Borralho, Cristina Ferreira, Rui Pinto, Catarina Abreu, Ana Lúcia Costa, Shile Zhang, Traci Pawlowski, Jim Godsey, André Mansinho, Daniela Macedo, Soraia Lobo-MartinsPedro Filipe, Rui Esteves, João Coutinho, Paulo Matos Costa, Afonso Ramires, Fernando Aldeia, António Quintela, Alex So, Li Liu, Ana Rita Grosso, Luis Costa

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)
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Abstract

Colorectal cancer (CRC) is a highly diverse disease, where different genomic instability pathways shape genetic clonal diversity and tumor microenvironment. Although intra-tumor heterogeneity has been characterized in primary tumors, its origin and consequences in CRC outcome is not fully understood. Therefore, we assessed intra- and inter-tumor heterogeneity of a prospective cohort of 136 CRC samples. We demonstrate that CRC diversity is forged by asynchronous forms of molecular alterations, where mutational and chromosomal instability collectively boost CRC genetic and microenvironment intra-tumor heterogeneity. We were able to depict predictor signatures of cancer-related genes that can foresee heterogeneity levels across the different tumor consensus molecular subtypes (CMS) and primary tumor location. Finally, we show that high genetic and microenvironment heterogeneity are associated with lower metastatic potential, whereas late-emerging copy number variations favor metastasis development and polyclonal seeding. This study provides an exhaustive portrait of the interplay between genetic and microenvironment intra-tumor heterogeneity across CMS subtypes, depicting molecular events with predictive value of CRC progression and metastasis development.

Original languageEnglish
Article number937
Number of pages14
JournalCommunications Biology
Volume5
Issue number1
DOIs
Publication statusPublished - 9 Sept 2022

Keywords

  • Colorectal Neoplasms/genetics
  • DNA Copy Number Variations
  • Humans
  • Oncogenes
  • Prospective Studies
  • Tumor Microenvironment/genetics

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