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Single-Cell Transcript Profiles Reveal Multilineage Priming in Early Progenitors Derived from Lgr5(+) Intestinal Stem Cells.

Tae-Hee Kim,A. Saadatpour,Guoji Guo,Madhurima Saxena,A. Cavazza,Niyati Desai,U. Jadhav,Lan Jiang,M. Rivera,S. Orkin,Guocheng Yuan,R. Shivdasani

Published 2016 in Cell Reports

ABSTRACT

Lgr5(+) intestinal stem cells (ISCs) drive epithelial self-renewal, and their immediate progeny-intestinal bipotential progenitors-produce absorptive and secretory lineages via lateral inhibition. To define features of early transit from the ISC compartment, we used a microfluidics approach to measure selected stem- and lineage-specific transcripts in single Lgr5(+) cells. We identified two distinct cell populations, one that expresses known ISC markers and a second, abundant population that simultaneously expresses markers of stem and mature absorptive and secretory cells. Single-molecule mRNA in situ hybridization and immunofluorescence verified expression of lineage-restricted genes in a subset of Lgr5(+) cells in vivo. Transcriptional network analysis revealed that one group of Lgr5(+) cells arises from the other and displays characteristics expected of bipotential progenitors, including activation of Notch ligand and cell-cycle-inhibitor genes. These findings define the earliest steps in ISC differentiation and reveal multilineage gene priming as a fundamental property of the process.

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