Astrocytes are the most abundant glial cell type residing in the brain, accounting for 20- 40% of all glial cells. Astrocytes have many important functions, some of which include neurotransmitter uptake and release, modulation of synaptic transmission, and nervous system repair. This webpage covers a background summary of astrocytes, highlights an important astrocytic marker, and the contribution of astrocytes to Amyotrophic Lateral Sclerosis (ALS) and Autism Spectrum Disorders.

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