Skip to main content
The role of Sox9 in mouse mammary gland development and maintenance of mammary stem and luminal progenitor cells
Abstract
Background
Identification and characterization of molecular controls that regulate mammary stem and progenitor cell homeostasis are critical to our understanding of normal mammary gland development and its pathology.Results
We demonstrate that conditional knockout of Sox9 in the mouse mammary gland results in impaired postnatal development. In short-term lineage tracing in the postnatal mouse mammary gland using Sox9-CreER driven reporters, Sox9 marked primarily the luminal progenitors and bipotent stem/progenitor cells within the basal mammary epithelial compartment. In contrast, long-term lineage tracing studies demonstrate that Sox9+ precursors gave rise to both luminal and myoepithelial cell lineages. Finally, fate mapping of Sox9 deleted cells demonstrates that Sox9 is essential for luminal, but not myoepithelial, lineage commitment and proliferation.Conclusions
These studies identify Sox9 as a key regulator of mammary gland development and stem/progenitor maintenance.Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.