Abstract:
:The Hippo pathway regulates the self-renewal and differentiation of various adult stem cells, but its role in cell fate determination and differentiation during liver development remains unclear. Here we report that the Hippo pathway controls liver cell lineage specification and proliferation separately from Notch signalling, using mice and primary hepatoblasts with liver-specific knockout of Lats1 and Lats2 kinase, the direct upstream regulators of YAP and TAZ. During and after liver development, the activation of YAP/TAZ induced by loss of Lats1/2 forces hepatoblasts or hepatocytes to commit to the biliary epithelial cell (BEC) lineage. It increases BEC and fibroblast proliferation by up-regulating TGFβ signalling, but suppresses hepatoblast to hepatocyte differentiation by repressing Hnf4α expression. Notably, oncogenic YAP/TAZ activation in hepatocytes induces massive p53-dependent cell senescence/death. Together, our results reveal that YAP/TAZ activity levels govern liver cell differentiation and proliferation in a context-dependent manner.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Lee DH,Park JO,Kim TS,Kim SK,Kim TH,Kim MC,Park GS,Kim JH,Kuninaka S,Olson EN,Saya H,Kim SY,Lee H,Lim DSdoi
10.1038/ncomms11961subject
Has Abstractpub_date
2016-06-30 00:00:00pages
11961issn
2041-1723pii
ncomms11961journal_volume
7pub_type
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