Abstract Title:

Supplemental Cellular Protection by a Carotenoid Extends Lifespan via Ins/IGF-1 Signaling in Caenorhabditis elegans.

Abstract Source:

Oxid Med Cell Longev. 2011 ;2011:596240. Epub 2011 Oct 12. PMID: 22013497

Abstract Author(s):

Koumei Yazaki, Chinatsu Yoshikoshi, Satoru Oshiro, Sumino Yanase

Article Affiliation:

Department of Health Science, Daito Bunka University School of Sports and Health Science, Iwadono 560, Higashi-matsuyama, Saitama 355-8501, Japan.

Abstract:

Astaxanthin (AX), which is produced by some marine animals, is a type of carotenoid that has antioxidative properties. In this study, we initially examined the effects of AX on the aging of a model organism C. elegans that has the conserved intracellular pathways related to mammalian longevity. The continuous treatments with AX (0.1 to 1 mM) from both the prereproductive and young adult stages extended the mean lifespans by about 16-30% in the wild-type and long-lived mutant age-1 of C. elegans. In contrast, the AX-dependent lifespan extension was not observed even in a daf-16 null mutant. Especially, the expression of genes encoding superoxide dismutases and catalases increased in two weeks after hatching, and the DAF-16 protein was translocated to the nucleus in the AX-exposed wild type. These results suggest that AX protects the cell organelle mitochondria and nucleus of the nematode, resulting in a lifespan extension via an Ins/IGF-1 signaling pathway during normal aging, at least in part.

Study Type : Animal Study

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