Transcriptional profile of aging in C. elegans.

Details

Serval ID
serval:BIB_CA6921634B56
Type
Article: article from journal or magazin.
Collection
Publications
Title
Transcriptional profile of aging in C. elegans.
Journal
Current Biology
Author(s)
Lund J., Tedesco P., Duke K., Wang J., Kim S.K., Johnson T.E.
ISSN
0960-9822
Publication state
Published
Issued date
2002
Peer-reviewed
Oui
Volume
12
Number
18
Pages
1566-1573
Language
english
Abstract
BACKGROUND: Numerous gerontogene mutants leading to dramatic life extensions have been identified in the nematode Caenorhabditis elegans over the last 20 years. Analysis of these mutants has provided a basis for understanding the mechanisms driving the aging process(es). Several distinct mechanisms including an altered rate of aging, increased resistance to stress, decreased metabolic rate, or alterations in a program causing organismic aging and death have been proposed to underlie these mutants. RESULTS: Whole-genome analysis of gene expression during chronological aging of the worm provides a rich database of age-specific changes in gene expression and represents one way to distinguish among these models. Using a rigorous statistical model with multiple replicates, we find that a relatively small number of genes (only 164) show statistically significant changes in transcript levels as aging occurs (<1% of the genome). Expression of heat shock proteins decreases, while expression of certain transposases increases in older worms, and these findings are consistent with a higher mortality risk due to a failure in homeostenosis and destabilization of the genome in older animals. Finally, a specific subset of genes is coordinately altered both during chronological aging and in the transition from the reproductive form to the dauer, demonstrating a mechanistic overlap in aging between these two processes. CONCLUSIONS: We have performed a whole-genome analysis of changes in gene expression during aging in C. elegans that provides a molecular description of C. elegans senescence.
Keywords
Aging/genetics, Animals, Caenorhabditis elegans/genetics, Caenorhabditis elegans/growth &amp, development, Gene Expression Profiling, Gene Expression Regulation, Developmental, Genes, Helminth, Longevity/genetics, Mutation, Oligonucleotide Array Sequence Analysis, RNA, Helminth/genetics, RNA, Messenger/genetics, Stress, Physiological/genetics, Tissue Distribution, Transcription, Genetic
Pubmed
Web of science
Open Access
Yes
Create date
19/11/2007 11:48
Last modification date
17/09/2024 16:32
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