Unknown,Transcriptomics,Genomics,Proteomics

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Transcription profiling of mouse neocortex to investigate age-related gene expression changes


ABSTRACT: Aging is associated with major nuclear changes affecting genomic integrity and gene expression. Here we compare the gene expression profiles in the neocortex of young (5 months old) and old (30 months old) B6xC3 F1 mice. In a related study, we compare genes that change expression with age to SIRT1 associated genes identified by ChIP on chip (NimbleGen) and find a significant overlap, indicating that SIRT1 target genes are preferentially deregulated with age. Experiment Overall Design: Total neocortex RNA was hybridized on Affymetrix M430 2.0 arrays. RNA was isolated from five young (5 months) and 5 old (30 months) B6xC3 F1 mice, samples were hybridized individually.

ORGANISM(S): Mus musculus

SUBMITTER: Philipp Oberdoerffer 

PROVIDER: E-GEOD-13120 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications


Genomic instability and alterations in gene expression are hallmarks of eukaryotic aging. The yeast histone deacetylase Sir2 silences transcription and stabilizes repetitive DNA, but during aging or in response to a DNA break, the Sir complex relocalizes to sites of genomic instability, resulting in the desilencing of genes that cause sterility, a characteristic of yeast aging. Using embryonic stem cells, we show that mammalian Sir2, SIRT1, represses repetitive DNA and a functionally diverse set  ...[more]

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