Nicotinamide riboside exerts protective effect against aging-induced NAFLD-like hepatic dysfunction in mice

PeerJ

article

Xue Han¹  Xiaogang Bao²  Qi Lou¹  Xian Xie³  Meng Zhang⁴  Shasang Zhou¹  Honggang Guo¹  Guojun Jiang⁵  Qiaojuan Shi¹ 

[1] Laboratory Animal Center, Zhejiang Academy of Medical Sciences, Hangzhou, Zhejiang Province;Department of Orthopedic Surgery, Spine Center, Changzheng Hospital, Second Military Medical University;Hospital of Stomatology, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province;Department of Clinical Laboratory, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang Province;Zhejiang Xiaoshan Hospital, Hangzhou, Zhejiang Province

关键词: Non-alcoholic fatty liver disease;    Nicotinamide adenine dinucleotide;    Nicotinamide riboside;    Aged mice;    Inflammatory infiltration;   

DOI  :  10.7717/peerj.7568

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Background & AimsAging is one of the risk factors of non-alcoholic fatty liver disease (NAFLD). Yet, the mechanism underlying the aging-associated NAFLD-like syndrome is not fully understood. Nicotinamide adenine dinucleotide (NAD), a ubiquitous coenzyme, has protective effects against aging. Here, we investigated the actions of NAD precursors nicotinamide riboside (NR) on the development of aging-induced NAFLD.MethodsNR supplemented food (2.5 g/kg food) was applied to aged mice for three months while normal chow to the other groups. Body weight, food intake, liver weight and fat pat mass were measured. The serum concentrations of lipid content, alanine aminotransferase (ALT), aspartate aminotransferase (AST) and NAD were determined by biochemical assays. Pathological assessment and immunohistochemistry analysis of hepatic tissues were used to evaluate the effect of NR on NAFLD development and inflammatory infiltration.ResultsNR repletion significantly reduced fat pat mass in aged mice, while not altered the body weight, food intake, and liver weight. NR repletion significantly rescued the NAD reduction in aged mice. The total cholesterol and triglyceride levels could be lowered by NR repletion in aged mice. The AST level was also significantly reduced by NR repletion in aged group, while the ALT level lowered but without significance. Notably, moderate NAFLD phenotypes, including steatosis and hepatic fibrosis could be markedly corrected by NR repletion. In addition, Kupffer cells accumulated and inflammatory infiltration could also be remarkably reversed by NR repletion in aged mice.ConclusionAging was associated with NAFLD-like phenotypes in mice, which could be reversed by oral NR repletion. Therefore, oral NR uptake might be a promising strategy to halt the progression of NAFLD.

【 授权许可】

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