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Astrocyte Mitochondria in White-Matter Injury

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Abstract

This review summarizes the diverse structure and function of astrocytes to describe the bioenergetic versatility required of astrocytes that are situated at different locations. The intercellular domain of astrocyte mitochondria defines their roles in supporting and regulating astrocyte-neuron coupling and survival against ischemia. The heterogeneity of astrocyte mitochondria, and how subpopulations of astrocyte mitochondria adapt to interact with other glia and regulate axon function, require further investigation. It has become clear that mitochondrial permeability transition pores play a key role in a wide variety of human diseases, whose common pathology may be based on mitochondrial dysfunction triggered by Ca2+ and potentiated by oxidative stress. Reactive oxygen species cause axonal degeneration and a reduction in axonal transport, leading to axonal dystrophies and neurodegeneration including Alzheimer’s disease, amyotrophic lateral sclerosis, Parkinson’s disease, and Huntington’s disease. Developing new tools to allow better investigation of mitochondrial structure and function in astrocytes, and techniques to specifically target astrocyte mitochondria, can help to unravel the role of mitochondrial health and dysfunction in a more inclusive context outside of neuronal cells. Overall, this review will assess the value of astrocyte mitochondria as a therapeutic target to mitigate acute and chronic injury in the CNS.

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Acknowledgements

This work was supported by grants from National Institute of Aging (NIA, AG033720) and National Institute of Neurological Diseases (NINDS, NS094881) to S.B. We thank Dr. Chris Nelson for help editing this paper.

Funding

This work was supported by grants from National Institute of Aging (NIA, AG033720) and National Institute of Neurological Diseases (NINDS, NS094881) to S.B.

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  1. Hung Nguyen and Sarah Zerimech contributed equally to this work.

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  1. Anesthesiology and Peri-Operative Medicine (APOM), Oregon Health and Science University, Portland, OR, 97239, USA

    Hung Nguyen, Sarah Zerimech & Selva Baltan

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  1. Hung Nguyen
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Correspondence to Selva Baltan.

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Nguyen, H., Zerimech, S. & Baltan, S. Astrocyte Mitochondria in White-Matter Injury. Neurochem Res 46, 2696–2714 (2021). https://doi.org/10.1007/s11064-021-03239-8

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