Spatially organized multicellular immune hubs in human colorectal cancer

Cell. 2021 Sep 2;184(18):4734-4752.e20. doi: 10.1016/j.cell.2021.08.003. Epub 2021 Aug 26.

Abstract

Immune responses to cancer are highly variable, with mismatch repair-deficient (MMRd) tumors exhibiting more anti-tumor immunity than mismatch repair-proficient (MMRp) tumors. To understand the rules governing these varied responses, we transcriptionally profiled 371,223 cells from colorectal tumors and adjacent normal tissues of 28 MMRp and 34 MMRd individuals. Analysis of 88 cell subsets and their 204 associated gene expression programs revealed extensive transcriptional and spatial remodeling across tumors. To discover hubs of interacting malignant and immune cells, we identified expression programs in different cell types that co-varied across tumors from affected individuals and used spatial profiling to localize coordinated programs. We discovered a myeloid cell-attracting hub at the tumor-luminal interface associated with tissue damage and an MMRd-enriched immune hub within the tumor, with activated T cells together with malignant and myeloid cells expressing T cell-attracting chemokines. By identifying interacting cellular programs, we reveal the logic underlying spatially organized immune-malignant cell networks.

Keywords: MSI; MSS; anti-tumor immunity; cell-cell interactions; colorectal cancer; mismatch repair-deficient; mismatch repair-proficient; scRNA-seq; spatial; tumor atlas.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Bone Morphogenetic Proteins / metabolism
  • Cancer-Associated Fibroblasts / metabolism
  • Cancer-Associated Fibroblasts / pathology
  • Cell Compartmentation
  • Cell Line, Tumor
  • Chemokines / metabolism
  • Cohort Studies
  • Colorectal Neoplasms / genetics
  • Colorectal Neoplasms / immunology*
  • Colorectal Neoplasms / pathology*
  • DNA Mismatch Repair / genetics
  • Endothelial Cells / metabolism
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Immunity
  • Inflammation / pathology
  • Monocytes / pathology
  • Myeloid Cells / pathology
  • Neutrophils / pathology
  • Stromal Cells / metabolism
  • T-Lymphocytes / metabolism
  • Transcription, Genetic

Substances

  • Bone Morphogenetic Proteins
  • Chemokines