Cited by 638Bone Metabolism and DiseasesBone health and osteoporosis researchAdipokines, Inflammation, and Metabolic Diseases

Irisin Mediates Effects on Bone and Fat via αV Integrin Receptors

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Kim, Hyeonwoo, Wrann, Christiane D., Jedrychowski, Mark, Vidoni, Sara, Kitase, Yukiko, Nagano, Kenichi, Zhou, Chenhe, Chou, Joshua +17 more·2018·Cell

Abstract

Irisin is secreted by muscle, increases with exercise, and mediates certain favorable effects of physical activity. In particular, irisin has been shown to have beneficial effects in adipose tissues, brain, and bone. However, the skeletal response to exercise is less clear, and the receptor for irisin has not been identified. Here we show that irisin binds to proteins of the αV class of integrins, and biophysical studies identify interacting surfaces between irisin and αV/β5 integrin. Chemical inhibition of the αV integrins blocks signaling and function by irisin in osteocytes and fat cells. Irisin increases both osteocytic survival and production of sclerostin, a local modulator of bone remodeling. Genetic ablation of FNDC5 (or irisin) completely blocks osteocytic osteolysis induced by ovariectomy, preventing bone loss and supporting an important role of irisin in skeletal remodeling. Identification of the irisin receptor should greatly facilitate our understanding of irisin's function in exercise and human health.

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Crossref · 10.1016/j.cell.2018.10.025

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Authors
Kim, H., Wrann, C. D., Jedrychowski, M., Vidoni, S., Kitase, Y., Nagano, K., Zhou, C., Chou, J., Parkman, V.-J. A., Novick, S. J., Strutzenberg, T. S., Pascal, B. D., Le, P. T., Brooks, D. J., Roche, A. M., Gerber, K. K., Mattheis, L., Chen, W., Tu, H., Bouxsein, M. L., Griffin, P. R., Baron, R., Rosen, C. J., Bonewald, L. F., & Spiegelman, B. M.
Affiliations
  • Harvard University (US)
  • Indiana University Indianapolis (US)
  • Scripps Research Institute (US)
  • Maine Medical Center Research Institute (US)
  • Beth Israel Deaconess Medical Center (US)
  • LakePharma (United States) (US)
Corresponding author
Spiegelman, Bruce M.
Venue
Cell
Publisher
Elsevier BV
Published
2018-12
Volume
175
Issue
7
Pages
1756-1768.e17
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2905310978
Cited by
638
References
91
Citations by year
2026: 66 · 2025: 96 · 2024: 93 · 2023: 83 · 2022: 100 · 2021: 94 · 2020: 59 · 2019: 44 · 2018: 1
FWCI
17.61
Type
journal article
Language
en
Update notices
erratum (2019-07-11)
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • IUScholarWorks (Indiana University) (submittedVersion)
  • Purdue University Indianapolis (Indiana University) (submittedVersion)
Funders
  • NIH (4 R01DK54477-19, DK61502, 5T32HL007374-38, K99NS087096, PO1AG039335, NIDDK RC2 092759)
  • JPB Foundation (6293803)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bone Metabolism and Diseases
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Bone health and osteoporosis research
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
irisin, FNDC5, ITGAV, osteocytes, osteolysis, sclerostin, bone remodeling, adipose tissue, physical activity, ovariectomy, bone loss, integrin signaling
MeSH terms
Adipose Tissue, Animals, Female, Fibronectins, Humans, Osteocytes, Osteolysis, Bone Remodeling, Adipocytes, Integrin alphaV, Cell Line, Tumor, Mice, HEK293 Cells

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