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- W1837192145 abstract "Genomic alterations in GNAS, the gene coding for the Gαs heterotrimeric G protein, are associated with a large number of human diseases. Here, we explored the role of Gαs on stem cell fate decisions by using the mouse epidermis as a model system. Conditional epidermal deletion of Gnas or repression of PKA signalling caused a remarkable expansion of the stem cell compartment, resulting in rapid basal-cell carcinoma formation. In contrast, inducible expression of active Gαs in the epidermis caused hair follicle stem cell exhaustion and hair loss. Mechanistically, we found that Gαs–PKA disruption promotes the cell autonomous Sonic Hedgehog pathway stimulation and Hippo signalling inhibition, resulting in the non-canonical activation of GLI and YAP1. Our study highlights an important tumour suppressive function of Gαs–PKA, limiting the proliferation of epithelial stem cells and maintaining proper hair follicle homeostasis. These findings could have broad implications in multiple pathophysiological conditions, including cancer. Gutkind and colleagues delineate a tumour suppressive signalling pathway involving the Gαs G protein and the PKA kinase, which inhibits pro-tumorigenic Yap and Shh signalling in epidermal stem cells." @default.
- W1837192145 created "2016-06-24" @default.
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- W1837192145 date "2015-05-11" @default.
- W1837192145 modified "2023-10-17" @default.
- W1837192145 title "Inactivation of a Gαs–PKA tumour suppressor pathway in skin stem cells initiates basal-cell carcinogenesis" @default.
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- W1837192145 doi "https://doi.org/10.1038/ncb3164" @default.
- W1837192145 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4449815" @default.
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- W1837192145 hasPublicationYear "2015" @default.
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