1. Nicotinamide Riboside Augments the Aged Human Skeletal Muscle NAD + Metabolome and Induces Transcriptomic and Anti-inflammatory Signatures.
- Author
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Elhassan YS, Kluckova K, Fletcher RS, Schmidt MS, Garten A, Doig CL, Cartwright DM, Oakey L, Burley CV, Jenkinson N, Wilson M, Lucas SJE, Akerman I, Seabright A, Lai YC, Tennant DA, Nightingale P, Wallis GA, Manolopoulos KN, Brenner C, Philp A, and Lavery GG
- Subjects
- Aged, Aged, 80 and over, Aging drug effects, Cross-Sectional Studies, Cytokines drug effects, Double-Blind Method, Humans, Male, Muscle, Skeletal drug effects, NAD metabolism, Niacinamide pharmacology, Pyridinium Compounds, Aging metabolism, Anti-Inflammatory Agents blood, Cytokines blood, Metabolome drug effects, Muscle, Skeletal metabolism, Niacinamide analogs & derivatives, Transcriptome drug effects
- Abstract
Nicotinamide adenine dinucleotide (NAD
+ ) is modulated by conditions of metabolic stress and has been reported to decline with aging in preclinical models, but human data are sparse. Nicotinamide riboside (NR) supplementation ameliorates metabolic dysfunction in rodents. We aimed to establish whether oral NR supplementation in aged participants can increase the skeletal muscle NAD+ metabolome and if it can alter muscle mitochondrial bioenergetics. We supplemented 12 aged men with 1 g NR per day for 21 days in a placebo-controlled, randomized, double-blind, crossover trial. Targeted metabolomics showed that NR elevated the muscle NAD+ metabolome, evident by increased nicotinic acid adenine dinucleotide and nicotinamide clearance products. Muscle RNA sequencing revealed NR-mediated downregulation of energy metabolism and mitochondria pathways, without altering mitochondrial bioenergetics. NR also depressed levels of circulating inflammatory cytokines. Our data establish that oral NR is available to aged human muscle and identify anti-inflammatory effects of NR., (Copyright © 2019 The Author(s). Published by Elsevier Inc. All rights reserved.)- Published
- 2019
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