Gene expression profiles of Notch signaling suppression in prostate basal cells.
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ABSTRACT: The role of Notch signaling in the maintenance and differentiation of adult prostate stem cells remains unclear. We found that Notch ligands are mainly expressed within the basal cell lineage, while active Notch signaling is detected in both the prostate basal and luminal cell lineages. Disrupting the canonical Notch effector RBP-J impairs the differentiation of prostate basal stem cells and increases their proliferation in vitro and in vivo, but does not affect luminal cell biology. Conversely, ectopic Notch activation in adult prostates results in basal cell depletion and luminal cell hyper-proliferation. TGFβ dominates over Notch and overrides Notch ablation-induced proliferation of prostate basal cells. In turn, Notch confers positive feedback by up-regulating a plethora of TGFβ signaling components including TGFβRI. These findings reveal crucial roles of the self-enforced positive reciprocal regulatory loop between TGFβ and Notch in maintaining prostate basal stem cell dormancy.
ORGANISM(S): Mus musculus
PROVIDER: GSE34067 | GEO | 2012/11/08
SECONDARY ACCESSION(S): PRJNA150011
REPOSITORIES: GEO
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