Modulation of OPC Mitochondrial Function by Inhibiting USP30 Promotes Their Differentiation
Allison L Soung1, Roxanne V Kyauk1, Shristi Pandey2
1Department of Neuroscience, Genentech Inc, South San Francisco, California, USA.
Glia
|November 27, 2024
Summary
Mitochondrial dysfunction impacts remyelination in diseases like multiple sclerosis (MS). Targeting USP30 enhances oligodendrocyte progenitor cell (OPC) differentiation and myelination by boosting mitochondrial energy production.
Area of Science:
- Neuroscience
- Cell Biology
- Mitochondrial Biology
Background:
- Mitochondrial dysfunction is implicated in demyelinating diseases such as multiple sclerosis (MS).
- Impaired remyelination in MS is linked to blocked oligodendrocyte progenitor cell (OPC) differentiation.
- OPC differentiation demands significant energy (ATP), supplied by mitochondria.
Purpose of the Study:
- To investigate mitochondrial gene expression changes during OPC differentiation in murine models and human MS brains.
- To determine if altering USP30, a mitochondrial deubiquitinase, affects OPC differentiation and myelination.
Main Methods:
- Analysis of mitochondrial gene expression in OPCs during differentiation (murine models, human MS brain tissue).
- Genetic knockout of USP30 in mice.
- In vitro, ex vivo, and in vivo assays to assess OPC differentiation, proliferation, survival, and myelination.
- Measurement of oxygen consumption rates in USP30 knockout OPCs.
Main Results:
- USP30 knockout significantly increased OPC differentiation and myelination in vitro and ex vivo.
- OPC proliferation and survival were unaffected by USP30 knockout.
- USP30 knockout accelerated OPC differentiation and myelination in vivo following focal demyelination.
- USP30 knockout OPCs exhibited increased oxygen consumption rates.
Conclusions:
- Mitochondrial function plays a crucial role in OPC differentiation and myelination.
- USP30 positively regulates OPC differentiation and myelination, potentially via enhanced mitochondrial respiration.
- Targeting USP30 represents a potential therapeutic strategy for promoting remyelination in demyelinating diseases.
Related Concept Videos
02:23Abnormal Proliferation
4.5K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.5K
02:23Master Transcription Regulators
6.9K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
6.9K
01:22iPS Cell Differentiation
2.6K
The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
2.6K