Intestinal Enteroendocrine Lineage Cells Possess Homeostatic and Injury-Inducible Stem Cell Activity

Cell Stem Cell. 2017 Jul 6;21(1):78-90.e6. doi: 10.1016/j.stem.2017.06.014.

Abstract

Several cell populations have been reported to possess intestinal stem cell (ISC) activity during homeostasis and injury-induced regeneration. Here, we explored inter-relationships between putative mouse ISC populations by comparative RNA-sequencing (RNA-seq). The transcriptomes of multiple cycling ISC populations closely resembled Lgr5+ ISCs, the most well-defined ISC pool, but Bmi1-GFP+ cells were distinct and enriched for enteroendocrine (EE) markers, including Prox1. Prox1-GFP+ cells exhibited sustained clonogenic growth in vitro, and lineage-tracing of Prox1+ cells revealed long-lived clones during homeostasis and after radiation-induced injury in vivo. Single-cell mRNA-seq revealed two subsets of Prox1-GFP+ cells, one of which resembled mature EE cells while the other displayed low-level EE gene expression but co-expressed tuft cell markers, Lgr5 and Ascl2, reminiscent of label-retaining secretory progenitors. Our data suggest that the EE lineage, including mature EE cells, comprises a reservoir of homeostatic and injury-inducible ISCs, extending our understanding of cellular plasticity and stemness.

Publication types

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

MeSH terms

  • Animals
  • Antigens, Differentiation / genetics
  • Antigens, Differentiation / metabolism*
  • Enteroendocrine Cells / metabolism*
  • Enteroendocrine Cells / pathology
  • Gene Expression Regulation
  • Intestinal Mucosa / injuries*
  • Intestinal Mucosa / metabolism*
  • Intestinal Mucosa / pathology
  • Jejunum / injuries*
  • Jejunum / metabolism*
  • Jejunum / pathology
  • Mice
  • Mice, Transgenic
  • Stem Cells / metabolism*
  • Stem Cells / pathology

Substances

  • Antigens, Differentiation