Longevity determined by developmental arrest genes in Caenorhabditis elegans
Di Chen
Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA, USA
Search for more papers by this authorKally Z. Pan
Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA, USA
Search for more papers by this authorJulia E. Palter
Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA, USA
Search for more papers by this authorPankaj Kapahi
Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA, USA
Search for more papers by this authorDi Chen
Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA, USA
Search for more papers by this authorKally Z. Pan
Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA, USA
Search for more papers by this authorJulia E. Palter
Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA, USA
Search for more papers by this authorPankaj Kapahi
Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA, USA
Search for more papers by this authorSummary
The antagonistic pleiotropy theory of aging proposes that aging takes place because natural selection favors genes that confer benefit early on life at the cost of deterioration later in life. This theory predicts that genes that impact development would play a key role in shaping adult lifespan. To better understand the link between development and adult lifespan, we examined the genes previously known to be essential for development. From a pool of 57 genes that cause developmental arrest after inhibition using RNA interference, we have identified 24 genes that extend lifespan in Caenorhabditis elegans when inactivated during adulthood. Many of these genes are involved in regulation of mRNA translation and mitochondrial functions. Genetic epistasis experiments indicate that the mechanisms of lifespan extension by inactivating the identified genes may be different from those of the insulin/insulin-like growth factor 1 (IGF-1) and dietary restriction pathways. Inhibition of many of these genes also results in increased stress resistance and decreased fecundity, suggesting that they may mediate the trade-offs between somatic maintenance and reproduction. We have isolated novel lifespan-extension genes, which may help understand the intrinsic link between organism development and adult lifespan.
Supporting Information
The following supplementary material is available for this article:
Fig. S1 Groups of genes.
Table S1 List of 57 genes that show larval arrest after RNAi inactivation.
Table S2 An RNAi screen identified 24 genes with functions in C. elegans development and aging.
Table S3 Lifespan extension in different genetic backgrounds.
Table S4 Heat stress, oxidative stress and fecundity assays.
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