Construction of developmental lineage relationships in the mouse mammary gland by single-cell RNA profiling

Bhupinder Pal, Yunshun Chen, François Vaillant, Paul Jamieson, Lavinia Gordon, Anne C. Rios, Stephen Wilcox, Naiyang Fu, Kevin He Liu, Felicity C. Jackling, Melissa J. Davis, Geoffrey J. Lindeman, Gordon K. Smyth and Jane E. Visvader ()
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Bhupinder Pal: The Walter and Eliza Hall Institute of Medical Research
Yunshun Chen: The University of Melbourne
François Vaillant: The Walter and Eliza Hall Institute of Medical Research
Paul Jamieson: The Walter and Eliza Hall Institute of Medical Research
Lavinia Gordon: The Walter and Eliza Hall Institute of Medical Research
Anne C. Rios: The Walter and Eliza Hall Institute of Medical Research
Stephen Wilcox: The Walter and Eliza Hall Institute of Medical Research
Naiyang Fu: The Walter and Eliza Hall Institute of Medical Research
Kevin He Liu: The Walter and Eliza Hall Institute of Medical Research
Felicity C. Jackling: The Walter and Eliza Hall Institute of Medical Research
Melissa J. Davis: The Walter and Eliza Hall Institute of Medical Research
Geoffrey J. Lindeman: The Walter and Eliza Hall Institute of Medical Research
Gordon K. Smyth: The Walter and Eliza Hall Institute of Medical Research
Jane E. Visvader: The Walter and Eliza Hall Institute of Medical Research

Nature Communications, 2017, vol. 8, issue 1, 1-14

Abstract: Abstract The mammary epithelium comprises two primary cellular lineages, but the degree of heterogeneity within these compartments and their lineage relationships during development remain an open question. Here we report single-cell RNA profiling of mouse mammary epithelial cells spanning four developmental stages in the post-natal gland. Notably, the epithelium undergoes a large-scale shift in gene expression from a relatively homogeneous basal-like program in pre-puberty to distinct lineage-restricted programs in puberty. Interrogation of single-cell transcriptomes reveals different levels of diversity within the luminal and basal compartments, and identifies an early progenitor subset marked by CD55. Moreover, we uncover a luminal transit population and a rare mixed-lineage cluster amongst basal cells in the adult mammary gland. Together these findings point to a developmental hierarchy in which a basal-like gene expression program prevails in the early post-natal gland prior to the specification of distinct lineage signatures, and the presence of cellular intermediates that may serve as transit or lineage-primed cells.

Date: 2017
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DOI: 10.1038/s41467-017-01560-x

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