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Updated: Mar 15, 2026
Generation of Oligodendrocytes and Oligodendrocyte-Conditioned Medium for Co-Culture Experiments
Published on: February 9, 2020
Olesoxime favors oligodendrocyte differentiation through a functional interplay between mitochondria and microtubules
K Magalon1, M Le Grand2, B El Waly1
1Aix Marseille Univ, CNRS, IBDM, Marseille, France.
Abstract:
Multiple sclerosis (MS) is a neurodegenerative disease characterized by episodes of immune attacks and oligodendrocyte death leading to demyelination and progressive functional deficits. New therapeutic strategies are needed to stimulate the spontaneous regenerative process observed in some patients. Spontaneous myelin repair relies on the mobilization and differentiation of endogenous oligodendrocyte progenitors at the lesion site. Olesoxime, a cholesterol-like compound, has been shown to favor oligodendrocyte maturation in culture and promote myelin regeneration in rodents. Here, we study the mode of action of this compound and show that it binds to oligodendrocyte mitochondria, leading to their hyperfilamentation. This is accompanied by a reduction of basal superoxide levels, and accumulation of End Binding Protein 1 (EB1) at growing ends of microtubules. In parallel, we demonstrate that Reactive Oxygen Species (ROS) scavengers also promote oligodendrocyte differentiation, together with increasing mitochondrial filamentation and EB1-dependent microtubule polymerization. Altogether, our data uncover the mechanisms by which olesoxime promotes oligodendrocyte maturation. They also reveal that a bidirectional relationship between mitochondria hyperfilamentation and ROS level modulation controls oligodendrocyte maturation. This study identifies new cellular mechanisms to target for the development of regenerative treatments for MS.
Insights
Olesoxime promotes myelin repair in multiple sclerosis (MS) by enhancing oligodendrocyte maturation. This compound targets mitochondria, reducing reactive oxygen species (ROS) and promoting microtubule growth for myelin regeneration.
Area of Science:
- Neuroscience
- Cell Biology
- Regenerative Medicine
Background:
- Multiple sclerosis (MS) involves immune attacks, oligodendrocyte death, and demyelination, necessitating regenerative therapies.
- Spontaneous myelin repair depends on endogenous oligodendrocyte progenitor cells (OPCs) differentiating at lesion sites.
- Olesoxime, a cholesterol-like compound, shows potential in promoting OPC maturation and myelin regeneration.
Purpose of the Study:
- To elucidate the mechanism of action of olesoxime in promoting oligodendrocyte maturation and myelin repair.
- To investigate the role of mitochondrial function and reactive oxygen species (ROS) in olesoxime-mediated regeneration.
- To identify cellular targets for developing new regenerative treatments for MS.
Main Methods:
- Investigated olesoxime's effects on oligodendrocyte mitochondria and microtubule dynamics.
- Assessed the impact of ROS scavengers on oligodendrocyte differentiation and mitochondrial morphology.
- Utilized cell culture and rodent models to study myelin regeneration.
Main Results:
- Olesoxime binds to oligodendrocyte mitochondria, inducing hyperfilamentation and reducing basal superoxide levels.
- Mitochondrial hyperfilamentation correlates with increased End Binding Protein 1 (EB1) accumulation at microtubule growing ends.
- ROS scavengers mimic olesoxime's effects, promoting differentiation, mitochondrial filamentation, and EB1-dependent microtubule polymerization.
Conclusions:
- Olesoxime promotes oligodendrocyte maturation through mitochondrial hyperfilamentation and ROS modulation.
- A bidirectional relationship exists between mitochondrial morphology and ROS levels in controlling oligodendrocyte differentiation.
- These findings reveal novel cellular mechanisms for developing regenerative therapies for MS.
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