The splicing regulator Rbfox2 is required for both cerebellar development and mature motor function.

Abstract:

:The Rbfox proteins (Rbfox1, Rbfox2, and Rbfox3) regulate the alternative splicing of many important neuronal transcripts and have been implicated in a variety of neurological disorders. However, their roles in brain development and function are not well understood, in part due to redundancy in their activities. Here we show that, unlike Rbfox1 deletion, the CNS-specific deletion of Rbfox2 disrupts cerebellar development. Genome-wide analysis of Rbfox2(-/-) brain RNA identifies numerous splicing changes altering proteins important both for brain development and mature neuronal function. To separate developmental defects from alterations in the physiology of mature cells, Rbfox1 and Rbfox2 were deleted from mature Purkinje cells, resulting in highly irregular firing. Notably, the Scn8a mRNA encoding the Na(v)1.6 sodium channel, a key mediator of Purkinje cell pacemaking, is improperly spliced in RbFox2 and Rbfox1 mutant brains, leading to highly reduced protein expression. Thus, Rbfox2 protein controls a post-transcriptional program required for proper brain development. Rbfox2 is subsequently required with Rbfox1 to maintain mature neuronal physiology, specifically Purkinje cell pacemaking, through their shared control of sodium channel transcript splicing.

journal_name

Genes Dev

journal_title

Genes & development

authors

Gehman LT,Meera P,Stoilov P,Shiue L,O'Brien JE,Meisler MH,Ares M Jr,Otis TS,Black DL

doi

10.1101/gad.182477.111

subject

Has Abstract

pub_date

2012-03-01 00:00:00

pages

445-60

issue

5

eissn

0890-9369

issn

1549-5477

pii

gad.182477.111

journal_volume

26

pub_type

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