Wnts regulate planar cell polarity via heterotrimeric G protein and PI3K signaling.
Wnts regulate planar cell polarity via heterotrimeric G protein and PI3K signaling.
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DOI:
10.1083/jcb.201912071
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发表时间:
2020-10-05
期刊:
影响因子:
--
通讯作者:
Lu X
中科院分区:
文献类型:
--
作者:
Landin Malt A;Hogan AK;Smith CD;Madani MS;Lu X
The planar cell polarity (PCP) pathway is essential for tissue morphogenesis. However, the roles of Wnt ligands in the mammalian PCP pathway remain poorly understood. This study identifies a Wnt/heterotrimeric G protein/PI3K pathway that regulates cell-intrinsic and tissue-level PCP in the mouse cochlea. In the mammalian cochlea, the planar cell polarity (PCP) pathway aligns hair cell orientation along the plane of the sensory epithelium. Concurrently, multiple cell intrinsic planar polarity (referred to as iPCP) modules mediate planar polarization of the hair cell apical cytoskeleton, including the kinocilium and the V-shaped hair bundle essential for mechanotransduction. How PCP and iPCP are coordinated during development and the roles of Wnt ligands in this process remain unresolved. Here we show that genetic blockade of Wnt secretion in the cochlear epithelium resulted in a shortened cochlear duct and misoriented and misshapen hair bundles. Mechanistically, Wnts stimulate Gi activity by regulating the localization of Daple, a guanine nucleotide exchange factor (GEF) for Gαi. In turn, the Gβγ complex signals through phosphoinositide 3-kinase (PI3K) to regulate kinocilium positioning and asymmetric localizations of a subset of core PCP proteins, thereby coordinating PCP and iPCP. Thus, our results identify a putative Wnt/heterotrimeric G protein/PI3K pathway for PCP regulation.
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DOI:
10.1523/jneurosci.3998-09.2009
发表时间:
2009-12-16
期刊:
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子:
--
作者:
Grimsley-Myers CM;Sipe CW;Géléoc GS;Lu X
通讯作者:
Lu X
影响因子:
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DOI:
10.1073/pnas.1222341110
发表时间:
2013-08-20
影响因子:
11.1
作者:
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