Endocrine

pp 1–15 | Cite as

Irisin in metabolic diseases

  • Stergios A. Polyzos
  • Athanasios D. Anastasilakis
  • Zoe A. Efstathiadou
  • Polyzois Makras
  • Nikolaos Perakakis
  • Jannis Kountouras
  • Christos S. Mantzoros
Review

Abstract

Introduction

Irisin is a myokine/adipokine induced by the exercise in mice and humans, which is proposed to induce “browning” of white adipose tissue, its primary target, thus increasing thermogenesis and energy expenditure. Since its identification, irisin has been linked to favorable effects on metabolic diseases, including obesity, type 2 diabetes mellitus (T2DM), lipid metabolism and cardiovascular disease (CVD), nonalcoholic fatty liver disease (NAFLD), polycystic ovary syndrome (PCOS), and metabolic bone diseases. Generally, despite the promising profile of irisin in rodents, its effects on human are less recognized.

Review

Most, but not all studies show a positive association between irisin and indices of adiposity. In T2DM, NAFLD, and CVD, most observational studies reported lower irisin levels in patients than controls. Regarding metabolic bone diseases, irisin is positively associated with bone mineral density and strength in athletes, and inversely associated with osteoporotic fractures in postmenopausal osteoporosis. In PCOS, data remain largely conflicting. Irisin does not seem to be further reduced when two metabolic diseases, e.g., T2DM and NAFLD, or obesity and NAFLD exist though more data are needed. Furthermore, it seems that diverse confounders may have affected the results of different clinical studies.

Conclusion

Irisin remains an appealing molecule from a pathophysiological point of view and an appealing therapeutic target for metabolic diseases, albeit much research is still needed.

Keywords

Cardiovascular disease Diabetes Irisin Myokine Nonalcoholic fatty liver disease Obesity 

Notes

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  • Stergios A. Polyzos
    • 1
  • Athanasios D. Anastasilakis
    • 2
  • Zoe A. Efstathiadou
    • 3
  • Polyzois Makras
    • 4
  • Nikolaos Perakakis
    • 5
  • Jannis Kountouras
    • 6
  • Christos S. Mantzoros
    • 5
  1. 1.First Department of Pharmacology, Medical SchoolAristotle University of ThessalonikiThessalonikiGreece
  2. 2.Department of Endocrinology424 General Military HospitalThessalonikiGreece
  3. 3.Department of EndocrinologyIppokration General HospitalThessalonikiGreece
  4. 4.Department of Endocrinology and Diabetes251 Hellenic Air Force General HospitalAthensGreece
  5. 5.Division of Endocrinology, Diabetes and Metabolism, Department of Internal Medicine, Beth Israel Deaconess Medical CenterHarvard Medical SchoolBostonUSA
  6. 6.Second Medical Clinic, Medical SchoolAristotle University of ThessalonikiThessalonikiGreece

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