Transcriptomics

Dataset Information

0

Histones associated with downregulated genes are hypo-acetylated in Huntington’s disease models


ABSTRACT: Transcriptional dysregulation plays a major role in the pathology of Huntington's disease (HD). However, the mechanisms causing selective downregulation of genes remain unknown. Histones regulate chromatin structure and thereby control gene expression; recent studies have demonstrated a therapeutic role for histone deacetylase (HDAC) inhibitors in polyglutamine diseases. This study demonstrates that despite no change in overall acetylated histone levels, histone H3 is hypo-acetylated at promoters of downregulated genes in R6/2 mice, ST14a and STHdh cells, as demonstrated by in vivo chromatin immunoprecipitation. In addition, HDAC inhibitor treatment increases association of acetylated histones with downregulated genes and corrects mRNA abnormalities. In contrast, there is a decrease in mRNA levels in wild-type cells following treatment with a histone acetyltransferase inhibitor. Although changes in histone acetylation correlate with decreased gene expression, histone hypo-acetylation may be a late event, as no hypo-acetylation is observed in 4-week-old R6/2 mice. Nevertheless, treatment with HDAC inhibitors corrects mRNA abnormalities through modification of histone proteins and may prove to be of therapeutic value in HD. Keywords: cell type comparison and disease state analysis

ORGANISM(S): Mus musculus

PROVIDER: GSE11358 | GEO | 2008/05/17

SECONDARY ACCESSION(S): PRJNA106579

REPOSITORIES: GEO

Dataset's files

Source:
Action DRS
Other
Items per page:
1 - 1 of 1

Similar Datasets

2008-06-20 | E-GEOD-11358 | biostudies-arrayexpress
2009-08-20 | E-GEOD-15735 | biostudies-arrayexpress
2012-04-15 | GSE36444 | GEO
2012-04-14 | E-GEOD-36444 | biostudies-arrayexpress
2006-09-19 | GSE5583 | GEO
2010-12-27 | E-GEOD-26317 | biostudies-arrayexpress
2010-12-27 | GSE26317 | GEO
2024-09-04 | GSE276338 | GEO
2009-08-20 | GSE15735 | GEO
2015-03-06 | E-GEOD-56526 | biostudies-arrayexpress