Abstract：
:Quiescence is a fundamental property of adult stem cells. Recent evidence indicates that quiescence is not a default state but requires active signaling that prevents accidental or untimely activation of stem cells. The calcitonin receptor (CalcR) is critical for sustaining quiescence in muscle satellite (stem) cells (MuSCs). However, the molecular mechanisms by which CalcR signaling regulates quiescence in MuSCs are enigmatic. Here, we demonstrate that transgenic expression of the catalytic domain of protein kinase A (PKA) restores the quiescence of CalcR-mutant MuSCs and delays MuSC activation. Mechanistically, CalcR-activated PKA phosphorylates Lats1/2, the main effector of Hippo signaling, thereby inhibiting the nuclear accumulation of Yap1, which prevents expression of Hippo-target genes, including cell-cycle-related molecules. Importantly, genetic inactivation of Yap1 in CalcR-mutant MuSCs reinstates quiescence in CalcR-mutant MuSCs, indicating that the CalcR-PKA-Lats1/2-Yap1 axis plays a critical role in sustaining MuSC quiescence.
journal_name
Cell Repjournal_title
Cell reportsauthors
Zhang L,Noguchi YT,Nakayama H,Kaji T,Tsujikawa K,Ikemoto-Uezumi M,Uezumi A,Okada Y,Doi T,Watanabe S,Braun T,Fujio Y,Fukada SIdoi
10.1016/j.celrep.2019.10.057subject
Has Abstractpub_date
2019-11-19 00:00:00pages
2154-2163.e5issue
8issn
2211-1247pii
S2211-1247(19)31371-3journal_volume
29pub_type
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