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Irisin and Bone: From Preclinical Studies to the Evaluation of Its Circulating Levels in Different Populations of Human Subjects

1
Department of Emergency and Organ Transplantation, University of Bari, 70124 Bari, Italy
2
Department of Basic Medical Sciences, Neuroscience and Sense Organs, Section of Human Anatomy and Histology, University of Bari, 70124 Bari, Italy
*
Author to whom correspondence should be addressed.
Cells 2019, 8(5), 451; https://doi.org/10.3390/cells8050451
Received: 30 April 2019 / Revised: 9 May 2019 / Accepted: 10 May 2019 / Published: 14 May 2019
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Abstract

Almost four years after the discovery of the anabolic action of irisin on bone in mice, ample clinical evidence is emerging in support of its additional physiological relevance in human bone. Irisin inversely correlates with sclerostin levels in adults with prediabetes and with vertebral fragility fractures in post-menopausal women. Furthermore, in athletes we observed a positive correlation between irisin and bone mineral density at different anatomical sites. Our group also described a positive association between serum irisin and bone status in healthy children and multivariate regression analysis showed that irisin is a stronger determinant of bone mineral status than bone alkaline phosphatase. In children with type 1 diabetes mellitus, serum irisin concentrations are positively associated with bone quality and with glycemic control following continuous subcutaneous insulin infusion. Additionally, our in vitro studies suggest the existence of a negative interplay between PTH and irisin biology and these results were also supported by the observation that post-menopausal women with primary hyperparathyroidism have lower levels of irisin compared to matched controls. In this review, we will focus on recent findings about circulating level of irisin in different populations of human subjects and its correlation with their bone status. View Full-Text
Keywords: irisin; osteoporosis; sarcopenia irisin; osteoporosis; sarcopenia
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Colaianni, G.; Sanesi, L.; Storlino, G.; Brunetti, G.; Colucci, S.; Grano, M. Irisin and Bone: From Preclinical Studies to the Evaluation of Its Circulating Levels in Different Populations of Human Subjects. Cells 2019, 8, 451.

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