A steroid hormone that extends the lifespan of Caenorhabditis elegans
- PMID: 17266678
- DOI: 10.1111/j.1474-9726.2006.00268.x
A steroid hormone that extends the lifespan of Caenorhabditis elegans
Erratum in
- Aging Cell. 2011 Jun;10(3):555
Abstract
Removing the germline of Caenorhabditis elegans extends lifespan. This lifespan extension requires the nuclear receptor DAF-12 and the cytochrome P450 DAF-9, suggesting that a lipophilic hormone is involved. Here we show that C. elegans contains several hormonal steroids that are also present in humans, including pregnenolone (3beta-hydroxy-pregn-5-en-20-one; PREG) and other pregnane and androstane derivatives. We find that PREG can extend the lifespan of C. elegans. Moreover, PREG levels rise when the germline is removed in a daf-9-dependent fashion. PREG extends the lifespan of germline-defective daf-9 mutants dramatically, but has no effect on daf-12 mutants. Thus, germline removal may extend lifespan, at least in part, by stimulating the synthesis of PREG.
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