Dietary Intake of Diosgenin Delays Aging of Male Fish Nothobranchius Guentheri Through Modulation of Multiple Pathways That Play Prominent Roles in ROS Production

Overview

Journal Biogerontology

Specialty Geriatrics

Date 2022 Feb 1

PMID 35102470

Authors

Lili Song

Congjun Li

Fei Wu

Shicui Zhang

Affiliations

Soon will be listed here.

Abstract

Oxidative stress including DNA damage, increased lipid and protein oxidation, is an important feature of aging. Diosgenin (DG) has been shown to have diverse biological effects, including amelioration of aging-related cognition deficits, but the anti-aging activity of DG has not been tested before in animal models. In the present study, we clearly demonstrated that dietary intake of DG extended both mean and maximum lifespans of the male fish Nothobranchius guentheri by approximately 3.23 and 3.67 weeks, respectively, reduced the accumulation of lipofuscin (LF) in the gills and senescence-associated-β-galactosidase (SA-β-Gal) in the caudal fins, and lowered the levels of protein oxidation, lipid peroxidation and reactive oxygen species (ROS) in the muscles, indicating that DG possesses rejuvenation and anti-aging property. We also showed that DG enhanced the activity of antioxidant enzymes, including catalase, superoxide dismutase and glutathione peroxidase, promoted the proteolytic activity of the ubiquitin-proteasome pathway, and suppressed the phosphatidylinositol 3-kinase/protein kinase/molecular target of rapamycin (PI3K/AKT/mTOR) signaling pathway. Altogether, this study highlights for the first time the rejuvenation and anti-aging property of the naturally occurring steroidal sapogenin DG. It also suggests that DG exerts its rejuvenation and anti-aging activity through modulation of multiple signaling pathways that play prominent roles in ROS production.

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