Abstract
Aging impacts nearly every tissue and function in an organism and presents the primary risk factor for major human diseases, including neurodegenerative diseases such as Alzheimer’s and Parkinson’s disease. The underlying cause of aging is likely a multifaceted yet interconnected tangle of processes, but there is a growing evidence that in the brain, microglia have a major role. Microglia are the resident immune cells in the brain. They are involved in development and maintenance of the brain through secretion of growth factors and clearance of unwanted cellular material, and it is thought that these functions deteriorate with age. Moreover, myelin fragments, abnormal protein assemblies, and cellular debris, which increase with aging and neurodegeneration, may overload the phagolysosomal capacity of microglia, leading to their abnormal activation and the secretion of detrimental inflammatory factors. To restore brain homeostasis during aging and disease, it may be necessary to increase beneficial microglial functions in addition to blocking detrimental ones.
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Marschallinger, J., Mosher, K.I., Wyss-Coray, T. (2018). Microglial Dysfunction in Brain Aging and Neurodegeneration. In: Fulop, T., Franceschi, C., Hirokawa, K., Pawelec, G. (eds) Handbook of Immunosenescence. Springer, Cham. https://doi.org/10.1007/978-3-319-64597-1_149-1
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DOI: https://doi.org/10.1007/978-3-319-64597-1_149-1
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