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Reactive astrocyte : ウィキペディア英語版
Astrogliosis

Astrogliosis (also known as astrocytosis or referred to as reactive astrocytosis) is an abnormal increase in the number of astrocytes due to the destruction of nearby neurons from CNS trauma, infection, ischemia, stroke, autoimmune responses, and neurodegenerative disease. In healthy neural tissue, astrocytes play critical roles in energy provision, regulation of blood flow, homeostasis of extracellular fluid, homeostasis of ions and transmitters, and regulation of synapse function, and synaptic remodeling.〔 Astrogliosis changes the molecular expression and morphology of astrocytes, causing scar formation and, in severe cases, inhibition of axon regeneration.
== Causes ==
Reactive astrogliosis is a spectrum of changes in astrocytes that occur in response to all forms of central nervous system (CNS) injury and disease. Changes due to reactive astrogliosis vary with the severity of the CNS insult along a gradated continuum of progressive alterations in molecular expression, progressive cellular hypertrophy, proliferation and scar formation.〔
Insults to neurons in the central nervous system caused by infection, trauma, ischemia, stroke, autoimmune responses, or other neurodegenerative diseases may cause reactive astrocytes.〔
When the astrogliosis is pathological itself, instead of a normal response to a pathological problem, it is referred to as astrocytopathy. 〔Michael V. Sofroniew, Astrogliosis, Advance, November 7, 2014, doi: 10.1101/cshperspect.a020420〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Astrogliosis」の詳細全文を読む



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