Ephexin1 is required for structural maturation and neurotransmission at the neuromuscular junction.
Ephexin1 is required for structural maturation and neurotransmission at the neuromuscular junction.
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DOI:
10.1016/j.neuron.2010.01.012
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发表时间:
2010-01-28
期刊:
影响因子:
16.2
通讯作者:
Ip NY
中科院分区:
文献类型:
--
作者:
Shi L;Butt B;Ip FC;Dai Y;Jiang L;Yung WH;Greenberg ME;Fu AK;Ip NY
The maturation of neuromuscular junctions (NMJs) requires the topological transformation of postsynaptic acetylcholine receptor (AChR)-containing structures from a simple plaque to an elaborate structure composed of pretzel-like branches. This maturation process results in the precise apposition of the pre- and postsynaptic specializations. However, little is known about the molecular mechanisms underlying the plaque-to-pretzel transition of AChR clusters. In this study, we identify an essential role for the RhoGEF ephexin1 in the maturation of AChR clusters. Adult ephexin1−/− mice exhibit severe muscle weakness and impaired synaptic transmission at the NMJ. Intriguingly, when ephexin1 expression is deficient in vivo, the NMJ fails to differentiate into the pretzel-like shape, and such abnormalities can be rescued by re-expression of ephexin1. We further demonstrate that ephexin1 regulates the stability of AChR clusters in a RhoA-dependent manner. Taken together, our findings reveal an indispensible role for ephexin1 in regulating the structural maturation and neurotransmission of NMJs.
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DOI:
10.1083/jcb.150.6.1321
发表时间:
2000-09-18
期刊:
The Journal of cell biology
影响因子:
--
作者:
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通讯作者:
Peng HB
影响因子:
3.2
作者:
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Ip, Nancy Y.
影响因子:
16.2
作者:
Lin, WC;Dominguez, B;Lee, KF
通讯作者:
Lee, KF
DOI:
10.1083/jcb.126.1.1
发表时间:
1994-07
期刊:
The Journal of cell biology
影响因子:
--
作者:
通讯作者:
--
影响因子:
3.5
作者:
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通讯作者:
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