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Updated: Jul 7, 2025
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Differentiation and Characterization of Osteoclasts from Human Induced Pluripotent Stem Cells
Published on: March 22, 2024
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Irisin Enhances Mitochondrial Function in Osteoclast Progenitors during Differentiation
Eben Estell1, Tsunagu Ichikawa1, Paige Giffault1
1Center for Molecular Medicine, MaineHealth Institute for Research, Scarborough, ME 04074, USA.
Biomedicines
|December 23, 2023
Summary
Irisin, a muscle-derived myokine, enhances osteoclastogenesis by boosting mitochondrial respiration in progenitor cells. This metabolic shift supports their differentiation, impacting bone remodeling.
Area of Science:
- Exercise physiology
- Bone biology
- Cellular metabolism
Background:
- Irisin is a myokine released during exercise with systemic effects.
- Irisin influences skeletal remodeling by enhancing osteoclastogenesis.
- The metabolic role of irisin in osteoclast progenitor differentiation requires further investigation.
Purpose of the Study:
- To investigate the effect of irisin on the metabolic function of osteoclast progenitors during differentiation.
- To elucidate the mechanisms by which irisin influences osteoclastogenesis.
Main Methods:
- Osteoclast progenitor cultures treated with irisin.
- Fluorescent imaging to assess mitochondrial content and reactive oxygen species (ROS).
- Mitochondrial stress testing using Seahorse analysis.
Main Results:
- Irisin treatment increased mitochondrial content and ROS production in osteoclast progenitors.
- Preconditioning with irisin significantly enhanced maximal oxygen consumption rate and spare respiratory capacity.
- These metabolic changes support osteoclast differentiation.
Conclusions:
- Irisin enhances osteoclast progenitor metabolism through mitochondrial respiration.
- This metabolic enhancement supports the energy demands for differentiation into mature osteoclasts.
- Irisin's action on osteoclastogenesis is further elucidated by its metabolic effects.
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