Epigenetic Alterations Regulate Estradiol-induced Enhancement of Memory Consolidation

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 2010 Mar 10

PMID 20212170

Citations 118

Authors

Zaorui Zhao

Lu Fan

Karyn M Frick

Affiliations

Soon will be listed here.

Abstract

The involvement of epigenetic alterations in mediating effects of estrogens on memory is unknown. The present study determined whether histone acetylation and DNA methylation are critical for the potent estrogen 17beta-estradiol (E(2)) to enhance object recognition memory. We show that dorsal hippocampal E(2) infusion increases acetylation of dorsal hippocampal histone H3, but not H4--an effect blocked by dorsal hippocampal inhibition of ERK activation. Further, intrahippocampal inhibition of ERK activation or DNA methyltransferase (DNMT) activity blocked the memory-enhancing effects of E(2). Consistent with these effects, E(2) decreased levels of HDAC2 protein and increased DNMT expression in the dorsal hippocampus. These findings provide evidence that the beneficial effects of E(2) on memory consolidation are associated with epigenetic alterations, and suggest these can be triggered by dorsal hippocampal ERK signaling.

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