Neuregulin 1 type III improves peripheral nerve myelination in a mouse model of congenital hypomyelinating neuropathy.

Abstract:

:Myelin sheath thickness is precisely regulated and essential for rapid propagation of action potentials along myelinated axons. In the peripheral nervous system, extrinsic signals from the axonal protein neuregulin 1 (NRG1) type III regulate Schwann cell fate and myelination. Here we ask if modulating NRG1 type III levels in neurons would restore myelination in a model of congenital hypomyelinating neuropathy (CHN). Using a mouse model of CHN, we improved the myelination defects by early overexpression of NRG1 type III. Surprisingly, the improvement was independent from the upregulation of Egr2 or essential myelin genes. Rather, we observed the activation of MAPK/ERK and other myelin genes such as peripheral myelin protein 2 and oligodendrocyte myelin glycoprotein. We also confirmed that the permanent activation of MAPK/ERK in Schwann cells has detrimental effects on myelination. Our findings demonstrate that the modulation of axon-to-glial NRG1 type III signaling has beneficial effects and improves myelination defects during development in a model of CHN.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Belin S,Ornaghi F,Shackleford G,Wang J,Scapin C,Lopez-Anido C,Silvestri N,Robertson N,Williamson C,Ishii A,Taveggia C,Svaren J,Bansal R,Schwab MH,Nave K,Fratta P,D'Antonio M,Poitelon Y,Feltri ML,Wrabetz L

doi

10.1093/hmg/ddy420

subject

Has Abstract

pub_date

2019-04-15 00:00:00

pages

1260-1273

issue

8

eissn

0964-6906

issn

1460-2083

pii

5237695

journal_volume

28

pub_type

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