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Updated: May 1, 2026

Differentiation and Characterization of Osteoclasts from Human Induced Pluripotent Stem Cells

Differentiation and Characterization of Osteoclasts from Human Induced Pluripotent Stem Cells

Published on: March 22, 2024

Irisin enhances osteoblast differentiation in vitro.

Graziana Colaianni¹, Concetta Cuscito¹, Teresa Mongelli¹

¹Department of Basic Medical Science, Neuroscience and Sense Organs, University of Bari, 70124 Bari, Italy.

International Journal of Endocrinology

|April 12, 2014

Summary

Exercise increases Irisin, a myokine from skeletal muscle. This study shows Irisin directly enhances osteoblast differentiation, suggesting potential for bone-building therapies.

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Isolation and Enrichment of Human Adipose-derived Stromal Cells for Enhanced Osteogenesis

Isolation and Enrichment of Human Adipose-derived Stromal Cells for Enhanced Osteogenesis

Published on: January 12, 2015

Area of Science:

Endocrinology
Bone Biology
Exercise Physiology

Background:

Skeletal muscle releases myokines like Irisin in response to exercise.
Irisin is known to promote the browning of white adipose tissue.
Muscle's role as an endocrine organ is increasingly recognized.

Purpose of the Study:

To investigate the direct role of Irisin in bone metabolism.
To determine if Irisin influences osteoblast differentiation.
To explore potential therapeutic applications for bone health.

Main Methods:

Collected conditioned media from myoblasts of exercised and non-exercised mice.
Assessed Irisin expression in myoblasts.
Evaluated the effect of conditioned media on bone marrow stromal cell differentiation in vitro.
Measured alkaline phosphatase and collagen I expression in differentiated osteoblasts.

Main Results:

Exercise significantly increased Irisin expression in mouse myoblasts.
Conditioned media from exercised myoblasts promoted osteoblast differentiation more than controls.
Irisin was confirmed to be essential for this enhanced osteoblast differentiation.
Increased alkaline phosphatase and collagen I expression were observed in an Irisin-dependent manner.

Conclusions:

Irisin directly targets osteoblasts, promoting their differentiation.
This study reveals a novel link between muscle-derived Irisin and bone metabolism.
Findings support the development of exercise-mimetic therapies for skeletal anabolic action.