The cell polarity protein Vangl2 in the muscle shapes the neuromuscular synapse by binding to and regulating the tyrosine kinase MuSK - Archive ouverte HAL Access content directly
Journal Articles Science Signaling Year : 2022

The cell polarity protein Vangl2 in the muscle shapes the neuromuscular synapse by binding to and regulating the tyrosine kinase MuSK

(1, 2) , (1, 2) , (1, 2) , (2) , (1, 2) , (3) , (3) , (4) , (4) , (1, 2) , (5) , (1, 2) , (6) , (6) , (1, 2, 7) , (1, 2) , (1, 2)
1
2
3
4
5
6
7

Abstract

The development of the neuromuscular junction (NMJ) requires dynamic trans-synaptic coordination orchestrated by secreted factors, including Wnt family morphogens. To investigate how these synaptic cues in NMJ development are transduced, particularly in the regulation of acetylcholine receptor (AChR) accumulation in the postsynaptic membrane, we explored the function of Van Gogh-like protein 2 (Vangl2), a core component of Wnt planar cell polarity signaling. We found that conditional, muscle-specific ablation of Vangl2 in mice reproduced the NMJ differentiation defects seen in mice with global Vangl2 deletion. These alterations persisted into adulthood and led to NMJ disassembly, impaired neurotransmission, and deficits in motor function. Vangl2 and the musclespecific receptor tyrosine kinase MuSK were functionally associated in Wnt signaling in the muscle. Vangl2 bound to and promoted the signaling activity of MuSK in response to Wnt11. The loss of Vangl2 impaired RhoA activation in cultured mouse myotubes and caused dispersed, rather than clustered, organization of AChRs at the postsynaptic or muscle cell side of NMJs in vivo. Our results identify Vangl2 as a key player of the core complex of molecules shaping neuromuscular synapses and thus shed light on the molecular mechanisms underlying NMJ assembly.
Embargoed file
Embargoed file
Ne sera jamais visible

Dates and versions

inserm-03768653 , version 1 (04-09-2022)

Identifiers

Cite

Myriam Boëx, Steve Cottin, Marius Halliez, Stéphanie Bauché, Céline Buon, et al.. The cell polarity protein Vangl2 in the muscle shapes the neuromuscular synapse by binding to and regulating the tyrosine kinase MuSK. Science Signaling, 2022, 15 (734), pp.eabg4982. ⟨10.1126/scisignal.abg4982⟩. ⟨inserm-03768653⟩
20 View
140 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More