The metabolite alpha-ketobutyrate extends lifespan by promoting peroxisomal function in C. elegans

被引:25
作者
Wu, Nan [1 ]
Ma, Yi-Cheng [1 ]
Gong, Xin-Qian [1 ]
Zhao, Pei-Ji [1 ]
Jia, Yong-Jian [1 ]
Zhao, Qiu [1 ]
Duan, Jia-Hong [1 ]
Zou, Cheng-Gang [1 ]
机构
[1] Yunnan Univ, Sch Life Sci, State key Lab Conservat & Utilizat Bio Resources Y, Kunming 650091, Yunnan, Peoples R China
基金
中国国家自然科学基金;
关键词
GERMLINE STEM-CELLS; HYDROGEN-SULFIDE PRODUCTION; CAENORHABDITIS-ELEGANS; TRANSCRIPTION FACTOR; DIETARY RESTRICTION; CALORIE RESTRICTION; OXIDATIVE STRESS; LIPID-METABOLISM; AUTOPHAGY; LONGEVITY;
D O I
10.1038/s41467-023-35899-1
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Metabolism is intimately linked to aging. There is a growing number of studies showing that endogenous metabolites may delay aging and improve healthspan. Through the analysis of existing transcriptome data, we discover a link between activation of the transsulfuration pathway and a transcriptional program involved in peroxisome function and biogenesis in long-lived glp-1(e2141ts) mutant Caenorhabditis elegans worms. Subsequently, we show that supplementation with alpha-ketobutyrate, an intermediate of the transsulfuration pathway, extends lifespan in wild-type worms. Alpha-ketobutyrate augments the production of NAD(+) via the lactate dehydrogenase LDH-1, leading to SIR-2.1/SIRT1-mediated enhanced peroxisome function and biogenesis, along with a concomitant increase in the expression of acox-1.2/ACOX1 in the peroxisomal fatty acid beta-oxidation pathway. ACOX-1.2/ACOX1 promotes H2O2 formation, thereby resulting in activation of SKN-1/NRF2. This transcription factor in turn extends the lifespan of worms by driving expression of autophagic and lysosomal genes. Finally, we show that alpha-ketobutyrate also delays the cellular senescence in fibroblast cells through the SIRT1-ACOX1-H2O2-NRF2 pathway. This finding uncovers a previously unknown role for alpha-ketobutyrate in organismal lifespan and healthspan by coordinating the NAD(+)-SIRT1 signaling and peroxisomal function. Understanding how metabolites modulate longevity is crucial for reducing aging-related disease. Here, the authors demonstrate that alpha-ketobutyrate exhibits an anti-aging effect by coordinating NAD + -SIRT1 signaling and peroxisome function.
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页数:14
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