Cited by 12Sirtuins and Resveratrol in MedicineMetabolism, Diabetes, and CancerAdipose Tissue and Metabolism

Modulation of Energy Sensing by Leucine Synergy with Natural Sirtuin Activators: Effects on Health Span

Zemel, Michael B.·2020·Journal of Medicinal Food

Abstract

Sirt1 and 5′ adenosine monophosphate-activated protein kinase (AMPK) are energy-sensing systems that work cooperatively and regulate mitochondrial biogenesis and fuel metabolism, and mediate, in part, the salutary effects of caloric restriction on lifespan and healthspan. We have shown that leucine activates Sirt1 and enables synergy with sirtuin co-activators. Resveratrol is a widely recognized activator of Sirt1; however, poor bioavailability and rapid metabolism limit effective clinical translation of promising animal data. However, we found that combining low resveratrol doses with leucine increased skeletal muscle and adipocyte Sirt1 activity, mitochondrial biogenesis and fatty acid oxidation; these effects result in increased lifespan and marked reductions in insulin resistance, inflammatory markers, body weight, and visceral adiposity in preclinical models. To translate these data to humans, we assessed the effects of resveratrol (50 mg)/leucine (1.11 g) on glucose dynamics in a 4-week placebo-controlled trial of 36 prediabetic subjects. Leucine-resveratrol reduced insulin resistance (homeostatic model assessment for insulin resistance) 33% with corresponding reductions in glucose and insulin area under the curve in oral glucose tolerance tests. We extended these concepts in preclinical studies using both direct Sirt1 activators and Sirt1 pathway activators. Low-dose (10 nM) NAD+ precursors (nicotinic acid, nicotinamide mononucleotide, and nicotinamide riboside) synergized with leucine to increase Sirt1 activity in adipocytes, hepatocytes, and muscle cells (30–100%, P < .01) and lifespan in Caenorhabditis elegans (25%, P = .025) and to significantly regress atherosclerotic lesion size and macrophage infiltration in a mouse model of atherosclerosis. Thus, synergistic activation of Sirt1 using leucine and a co-activator exerts pleiotropic effects impacting cardiometabolic endpoints.

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Crossref · 10.1089/jmf.2020.0105

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  • A human clinical trial of leucine-resveratrol combinations improved glucose homeostasis and insulin sensitivity in patients with prediabetes.

    “Interestingly, a human clinical trial testing leucine–resveratrol combinations showed improved glucose homeostasis and insulin sensitivity in patients with prediabetes, suggesting that synergistic approaches might be a good alternative to treat age-associated metabolic diseases250.”

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Authors
Zemel, M. B.
Affiliations
NuSirt Biopharma, Research and Development, Knoxville, Tennessee, USA.
Corresponding author
Zemel, Michael B.
Venue
Journal of Medicinal Food
Published
2020-11-01
Volume
23
Issue
11
Pages
1129-1135
ISSN
  • 1096-620X (ISSN-L)
  • 1557-7600
OpenAlex
W3047837124
Cited by
12
References
49
Citations by year
2025: 1 · 2023: 4 · 2022: 5 · 2021: 1 · 2020: 1
FWCI
1.45
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Medicinal Food (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
leucine, SIRT1, resveratrol, AMPK, NAD+ precursors, nicotinamide mononucleotide, nicotinamide riboside, nicotinic acid, healthspan, lifespan, insulin resistance, prediabetes, glucose tolerance, mitochondrial biogenesis, fatty acid oxidation, atherosclerosis, visceral fat, energy sensing, Caenorhabditis elegans
MeSH terms
Resveratrol, Animals, Humans, Insulin Resistance, Leucine, Longevity, Mice, Obese, Prediabetic State, Stilbenes, AMP-Activated Protein Kinases, Sirtuin 1

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