Single-cell RNA Sequencing Reveals How the Aryl Hydrocarbon Receptor Shapes Cellular Differentiation Potency in the Mouse Colon

Yongjian Yang, Daniel Osorio, Laurie A. Davidson, Huajun Han, Destiny A. Mullens, Arul Jayaraman, Stephen Safe, Ivan Ivanov, James J. Cai, Robert S. Chapkin

Research output: Contribution to journalArticlepeer-review

Abstract

Despite recent progress recognizing the importance of aryl hydrocarbon receptor (Ahr)-dependent signaling in suppressing colon tumorigenesis, its role in regulating colonic crypt homeostasis remains unclear. To assess the effects of Ahr on intestinal epithelial cell heterogeneity and functional phenotypes, we utilized single-cell transcriptomics and advanced analytic strategies to generate a high-quality atlas for colonic intestinal crypts from wild-type and intestinalspecific Ahr knockout mice. Here we observed the promotive effects of Ahr deletion on Foxm1-regulated genes in cryptassociated canonical epithelial cell types and subtypes of goblet cells and deep crypt-secretory cells.Wealso show that intestinal Ahr deletion elevated single-cell entropy (a measure of differentiation potency or cell stemness) and RNA velocity length (a measure of the rate of cell differentiation) in noncycling and cycling Lgr5 stem cells. In general, intercellular signaling cross-talk via soluble and membrane- bound factors was perturbed in Ahr-null colonocytes. Taken together, our single-cell RNA sequencing analyses provide new evidence of the molecular function of Ahr in modulating putative stem cell driver genes, cell potency lineage decisions, and cell-cell communication in vivo.

Original languageEnglish (US)
Pages (from-to)17-28
Number of pages12
JournalCancer Prevention Research
Volume15
Issue number1
DOIs
StatePublished - Jan 2022

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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