title: Lifespan extension by cranberry supplementation partially requires SOD2 and is life stage independent.
abstract: Many nutraceuticals and pharmaceuticals have been shown to promote healthspan and lifespan. However, the mechanisms underlying the beneficial effects of prolongevity interventions and the time points at which interventions should be implemented to achieve beneficial effects are not well characterized. We have previously shown that a cranberry-containing nutraceutical can promote lifespan in worms and flies and delay age-related functional decline of pancreatic cells in rats. Here we investigated the mechanism underlying lifespan extension induced by cranberry and the effects of short-term or life stage-specific interventions with cranberry on lifespan in Drosophila. We found that lifespan extension induced by cranberry was associated with reduced phosphorylation of ERK, a component of oxidative stress response MAPK signaling, and slightly increased phosphorylation of AKT, a component of insulin-like signaling. Lifespan extension was also associated with a reduced level of 4-hydroxynonenal protein adducts, a biomarker of lipid oxidation. Moreover, lifespan extension induced by cranberry was partially suppressed by knockdown of SOD2, a major mitochondrial superoxide scavenger. Furthermore, cranberry supplementation was administered in three life stages of adult flies, health span (3-30 days), transition span (31-60 days) and senescence span (61 days to the end when all flies died). Cranberry supplementation during any of these life stages extended the remaining lifespan relative to the non-supplemented and life stage-matched controls. These findings suggest that cranberry supplementation is sufficient to promote longevity when implemented during any life stage, likely through reducing oxidative damage.
authors: Functional Genomics Unit, Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA.
authors: Yaning
authors: Y
authors: Sun
authors: Functional Genomics Unit, Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA.
authors: Jason
authors: J
authors: Yolitz
authors: Functional Genomics Unit, Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA.
authors: Thomas
authors: T
authors: Alberico
authors: Functional Genomics Unit, Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA.
authors: Xiaoping
authors: X
authors: Sun
authors: Functional Genomics Unit, Translational Gerontology Branch, National Institute on Aging, Baltimore, MD 21224, USA. Electronic address: zous@mail.nih.gov.
authors: Sige
authors: S
authors: Zou
mesh_terms: D000375:Aging / Q000502:physiology; D000818:Animals; D019587:Dietary Supplements; D004330:Drosophila / Q000502:physiology; D055785:Gene Knockdown Techniques; D007328:Insulin / Q000502:physiology; D008136:Longevity / Q000187:drug effects* / Q000502:physiology; D020935:MAP Kinase Signaling System / Q000502:physiology; D018384:Oxidative Stress / Q000187:drug effects; D008517:Phytotherapy / Q000379:methods*; D010936:Plant Extracts / Q000494:pharmacology; D015398:Signal Transduction / Q000187:drug effects; D013482:Superoxide Dismutase / Q000235:genetics / Q000502:physiology*; D016019:Survival Analysis; D029799:Vaccinium macrocarpon; D000099156:Superoxide Dismutase 2
chemical_list: D007328:Insulin; D010936:Plant Extracts; D013482:Superoxide Dismutase; D000099156:Superoxide Dismutase 2
keywords: 4-HNE; 4-hydroxynonenal; Aging; Botanical; Dietary intervention; IR; Life stage; MAP kinase; MAPK; Nutraceutical; Oxidative stress; RNA interference; RNAi; S6 kinase; S6K; SOD1; SOD2; SY; TOR; cran; cranberry; inverted repeat; sugar-yeast diet; superoxide dismutase 1; superoxide dismutase 2; target of rapamycin