MeCP2 regulates activity-dependent transcriptional responses in olfactory sensory neurons.

Abstract:

:During postnatal development, neuronal activity controls the remodeling of initially imprecise neuronal connections through the regulation of gene expression. MeCP2 binds to methylated DNA and modulates gene expression during neuronal development and MECP2 mutation causes the autistic disorder Rett syndrome. To investigate a role for MeCP2 in neuronal circuit refinement and to identify activity-dependent MeCP2 transcription regulations, we leveraged the precise organization and accessibility of olfactory sensory axons to manipulation of neuronal activity through odorant exposure in vivo. We demonstrate that olfactory sensory axons failed to develop complete convergence when Mecp2 is deficient in olfactory sensory neurons (OSNs) in an otherwise wild-type animal. Furthermore, we demonstrate that expression of selected adhesion genes was elevated in Mecp2-deficient glomeruli, while acute odor stimulation in control mice resulted in significantly reduced MeCP2 binding to these gene loci, correlating with increased expression. Thus, MeCP2 is required for both circuitry refinement and activity-dependent transcriptional responses in OSNs.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Lee W,Yun JM,Woods R,Dunaway K,Yasui DH,Lasalle JM,Gong Q

doi

10.1093/hmg/ddu358

subject

Has Abstract

pub_date

2014-12-01 00:00:00

pages

6366-74

issue

23

eissn

0964-6906

issn

1460-2083

pii

ddu358

journal_volume

23

pub_type

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