alexa Free [NADH] [NAD(+)] regulates sirtuin expression.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Metabolic Syndrome

Author(s): Gambini J, GomezCabrera MC, Borras C, Valles SL, LopezGrueso R,

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Abstract Sirtuins are deacetylases involved in metabolic regulation and longevity. Our aim was to test the hypothesis that they are subjected to redox regulation by the [NADH]/[NAD(+)] ratio. We used NIH3T3 fibroblasts in culture, Drosophila fed with or without ethanol and exercising rats. In all three models an increase in [NADH]/[NAD(+)] came up with an increased expression of sirtuin mRNA and protein. PGC-1α (a substrate of sirtuins) protein level was significantly increased in fibroblasts incubated with lactate and pyruvate but this effect was lost in fibroblasts obtained from sirtuin-deficient mice. We conclude that the expression of sirtuins is subject to tight redox regulation by the [NADH]/[NAD(+)] ratio, which is a major sensor for metabolite availability conserved from invertebrates to vertebrates. Copyright © 2011. Published by Elsevier Inc. This article was published in Arch Biochem Biophys and referenced in Journal of Metabolic Syndrome

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