Defective glucocorticoid hormone receptor signaling leads to increased stress and anxiety in a mouse model of Angelman syndrome.

Abstract:

:Angelman syndrome (AS) is a neurodevelopmental disorder caused due to deletions or loss-of-function mutations in maternally inherited UBE3A. Ube3a functions as an ubiquitin ligase as well as a transcriptional coactivator of steroid hormone receptors. However, the mechanisms by which maternal Ube3a deficiency gives rise to phenotypic features of AS are not clear. We report here that Ube3a regulates glucocorticoid receptor (GR) transactivation and GR signaling pathway is disrupted in Ube3a-maternal-deficient mice brain. The expression of several GR-dependent genes is down-regulated in multiple brain regions of Ube3a-maternal-deficient mice. AS mice show significantly higher level of blood corticosterone, selective loss of GR and reduced number of parvalbumin-positive inhibitory interneurons in their hippocampus that could ultimately lead to increased stress. These mice also exhibit increased anxiety-like behavior, which could be due to chronic stress. Altogether, our findings suggest that chronic stress due to altered GR signaling might lead to anxiety-like behavior in a mouse of model of AS.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Godavarthi SK,Dey P,Maheshwari M,Jana NR

doi

10.1093/hmg/ddr614

subject

Has Abstract

pub_date

2012-04-15 00:00:00

pages

1824-34

issue

8

eissn

0964-6906

issn

1460-2083

pii

ddr614

journal_volume

21

pub_type

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