Cited by 309Adipose Tissue and MetabolismMuscle Physiology and DisordersAdipokines, Inflammation, and Metabolic Diseases

Irisin stimulates muscle growth-related genes and regulates adipocyte differentiation and metabolism in humans

Huh, J Y, Dincer, F, Mesfum, E, Mantzoros, C S·2014·International Journal of Obesity

Abstract

Background Irisin is a recently identified exercise-induced myokine suggested to induce browning of white adipocytes. Deficiency of myostatin, and thus stimulation of muscle growth, has also been reported to induce irisin and its precursor FNDC5 expression in muscle and drive the browning of white adipocytes in mice, implying that irisin may be related to muscle growth in addition to its beneficial effects in adipocytes. In humans, the effect of irisin in muscle hypertrophy as well as adipocyte metabolism has not been fully investigated.Methods Primary cultured human myocytes/adipocytes and 3T3-L1 cells were used to examine irisin-regulated gene/protein expression. Lipid accumulation, ATP content, glycolysis, lipolysis and metabolite profile were measured in control and irisin-treated (10 and 50 nM) adipocytes.Results In human myocytes, FNDC5 mRNA and irisin secretion were increased during myogenic differentiation, along with PGC1α and myogenin expression. Irisin treatment significantly increased insulin-like growth factor 1 and decreased myostatin gene expression through ERK pathway. PGC1α4, a newly discovered PGC1α isoform specifically related to muscle hypertrophy, was also upregulated. In human adipocytes, irisin induced uncoupling protein 1 and consequently increased adipocyte energy expenditure, expression of metabolic enzymes and metabolite intermediates, resulting in inhibition of lipid accumulation. Irisin and FNDC5 treatment also reduced preadipocyte differentiation, suggesting an additional mechanism in suppressing fat mass.Conclusions These results suggest that irisin/FNDC5 has a pleiotropic role in muscle and improvement of adipocyte metabolism in humans.

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Crossref · 10.1038/ijo.2014.42

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Authors
Huh, J. Y., Dincer, F., Mesfum, E., & Mantzoros, C. S.
Affiliations
Beth Israel Deaconess Medical Center (US)
Corresponding author
Mantzoros, C S
Venue
International Journal of Obesity
Published
2014-03-11
Volume
38
Issue
12
Pages
1538-1544
ISSN
  • 0307-0565 (ISSN-L)
  • 1476-5497
OpenAlex
W2022352721
Cited by
309
References
33
Citations by year
2026: 15 · 2025: 23 · 2024: 28 · 2023: 30 · 2022: 56 · 2021: 27 · 2020: 24 · 2019: 23 · 2018: 15 · 2017: 25 · 2016: 18 · 2015: 14 · 2014: 11
FWCI
15.07
Type
journal article
Language
en
Open access
closed
Locations
  • International Journal of Obesity (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
irisin, FNDC5, myokines, muscle hypertrophy, adipogenesis, adipocyte metabolism, white adipose tissue browning, myostatin, insulin-like growth factor I, ERK signaling, UCP1, energy expenditure, lipid accumulation, preadipocyte differentiation, 3T3-L1 adipocytes
MeSH terms
Animals, Cell Differentiation, Cells, Cultured, Fibronectins, Gene Expression Regulation, Humans, Insulin Resistance, RNA, Messenger, Blotting, Western, Biomarkers, Adipocytes, Muscle, Skeletal, Myocytes, Smooth Muscle, 3T3-L1 Cells, Mice

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