Cited by 612Adipose Tissue and MetabolismAdipokines, Inflammation, and Metabolic DiseasesExercise and Physiological Responses

FNDC5/irisin is not only a myokine but also an adipokine

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Roca-Rivada, Arturo, Castelao, Cecilia, Senin, Lucía L., Landrove, María O., Baltar, Javier, Crujeiras, Ana Belén, Seoane, Luisa María, Casanueva, Felipe F. +1 more·2013·PLoS ONE

Abstract

Exercise provides clear beneficial effects for the prevention of numerous diseases. However, many of the molecular events responsible for the curative and protective role of exercise remain elusive. The recent discovery of FNDC5/irisin protein that is liberated by muscle tissue in response to exercise might be an important finding with regard to this unsolved mechanism. The most striking aspect of this myokine is its alleged capacity to drive brown-fat development of white fat and thermogenesis. However, the nature and secretion form of this new protein is controversial. The present study reveals that rat skeletal muscle secretes a 25 kDa form of FNDC5, while the 12 kDa/irisin theoretical peptide was not detected. More importantly, this study is the first to reveal that white adipose tissue (WAT) also secretes FNDC5; hence, it may also behave as an adipokine. Our data using rat adipose tissue explants secretomes proves that visceral adipose tissue (VAT), and especially subcutaneous adipose tissue (SAT), express and secrete FNDC5. We also show that short-term periods of endurance exercise training induced FNDC5 secretion by SAT and VAT. Moreover, we observed that WAT significantly reduced FNDC5 secretion in fasting animals. Interestingly, WAT of obese animals over-secreted this hormone, which might suggest a type of resistance. Because 72% of circulating FNDC5/irisin was previously attributed to muscle secretion, our findings suggest a muscle-adipose tissue crosstalk through a regulatory feedback mechanism.

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Authors
Roca-Rivada, A., Castelao, C., Senin, L. L., Landrove, M. O., Baltar, J., Crujeiras, A. B., Seoane, L. M., Casanueva, F. F., & Pardo, M.
Affiliations
  • Instituto de Salud Carlos III (ES)
  • Complejo Hospitalario Universitario de Santiago (ES)
Corresponding author
Pardo, María
Venue
PLoS ONE
Published
2013-04-11
Volume
8
Issue
4
Pages
e60563
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2008675205
Cited by
612
References
42
Citations by year
2026: 12 · 2025: 35 · 2024: 45 · 2023: 46 · 2022: 51 · 2021: 65 · 2020: 45 · 2019: 42 · 2018: 44 · 2017: 52 · 2016: 55 · 2015: 56 · 2014: 44 · 2013: 19
FWCI
40.28
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • RUNA. Repositorio Institucional del Sergas (Servicio Gallego de Salud (SERGAS)) (submittedVersion, cc-by)
Funders
  • Instituto de Salud Carlos III (CB06/03, FISP10/00537)
  • Servicio Gallego de Salud
Topics
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
Keywords
FNDC5, irisin, adipokines, myokines, white adipose tissue, visceral adipose tissue, subcutaneous adipose tissue, skeletal muscle, endurance training, fasting, obesity, thermogenesis, secretome
MeSH terms
Animals, Fibronectins, Humans, Male, Physical Conditioning, Animal, Immunoblotting, Rats, Sprague-Dawley, Muscle, Skeletal, 3T3-L1 Cells, Mice, Rats, Adipose Tissue, White, Adipokines, Real-Time Polymerase Chain Reaction

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