SIRT1 and NAD as regulators of ageing

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• 作者：Leopold Rehan^a ; Krystyna Laszki-Szcz膮chor^b ; Ma艂gorzata Sobieszcza艅ska^b ; Dorota Polak-Jonkisz^c ; ^{dorota.polak-jonkisz@umed.wroc.pl" class="auth_mail}
• 关键词：SIRT 1 ; Sirtuin 1 ; SCN ; hypothalamic suprachiasmatic nucleus ; PBEF ; nicotinamide phosphoribosyltransferase gene ; CLOCK ; circadian locomotor output cycles kaput gene ; CLOCK ; circadian locomotor output cycles kaput gene ; PER2 ; period circadian protein homolog 2 gene ; PER2 ; period circadian protein homolog 2 ; PGC-1伪 ; peroxisome proliferator-activated receptor 纬 coactivator 1伪 ; PPAR纬 ; peroxisome proliferator-activated receptor 纬 ; Nampt ; nicotinamide phosphoribosyltransferase ; NMN ; nicotinamide monon
• 刊名：Life Sciences
• 出版年：6 June 2014
• 年：2014
• 卷：105
• 期：1-2
• 页码：1-6
• 全文大小：388 K

文摘

The recent research on ageing processes in mammals throws new light on the biochemistry of circadian clock. The already known regulatory pathways for biological rhythms and metabolism, combined with newly discovered functions of sirtuins, unveil a perspective for new hypotheses, regarding possible links between ageing and circadian rhythms. The NAD World hypothesis – postulated as a systemic regulatory network for the metabolism and ageing, linked with mammalian, NAD + dependent Sirtuin 1 – conceptually involves two critical elements. One is the systemic, Nampt-controlled NAD + (nicotinamide phosphoribosyltransferase) biosynthesis, where Nampt (nicotinamide phosphoribosyltransferase) acts as “propulsion” for metabolism and the other is NAD + dependent deacetylase (SIRT1) — a regulator responsible for various biological effects, depending on its localisation in organism. In this approach, the role of sirtuins, which are evolutionary conservative, NAD + dependent histone deacetylases, may be very important for the mammalian metabolic clock. This paper is a review of current research on possible links among SIRT1 (Sirtuin 1), metabolism and ageing with particular consideration of the NAD World hypothesis.