Title

Adar2-Dependent Rna Editing Of Ampa Receptor Subunit Glur2 Determines Vulnerability Of Neurons In Forebrain Ischemia

Abstract

ADAR2 is a nuclear enzyme essential for GluR2 pre-mRNA editing at Q/R site-607, which gates Ca2+ entry through AMPA receptor channels. Here, we show that forebrain ischemia in adult rats selectively reduces expression of ADAR2 enzyme and, hence, disrupts RNA Q/R site editing of GluR2 subunit in vulnerable neurons. Recovery of GluR2 Q/R site editing by expression of exogenous ADAR2b gene or a constitutively active CREB, VP16-CREB, which induces expression of endogenous ADAR2, protects vulnerable neurons in the rat hippocampus from forebrain ischemic insult. Generation of a stable ADAR2 gene silencing by delivering small interfering RNA (siRNA) inhibits GluR2 Q/R site editing, leading to degeneration of ischemia-insensitive neurons. Direct introduction of the Q/R site edited GluR2 gene, GluR2(R607), rescues ADAR2 degeneration. Thus, ADAR2-dependent GluR2 Q/R site editing determines vulnerability of neurons in the rat hippocampus to forebrain ischemia. ©2006 Elsevier Inc.

Publication Date

3-2-2006

Publication Title

Neuron

Volume

49

Issue

5

Number of Pages

719-733

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.neuron.2006.01.025

Socpus ID

33344477023 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33344477023

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