Astrocyte proliferation in culture following exposure to potassium ion.

Abstract:

:Following brain injury astrocytes swell acutely and proliferate thereafter. To investigate the direct relationship between swelling and proliferation, cultured astroglial cells were exposed to 60 mM K+ ion or hypo-osmolar (205 mOsm) electrolyte solution for 1 h to cause transient swelling. Proliferation was assessed by bromodeoxyuridine (BrdU) uptake 24 and 96 h later. The cells were double-labelled with antibodies to glial fibrillary acidic protein (GFAP) and BrdU. At 96 h the GFAP immunoreactive cells exposed to K+ exhibited 44.9% uptake versus 27.0% and 21.1% for control and hypo-osmolar exposed cells, respectively. We conclude that swelling of astroglia in vitro does not induce cell proliferation but transient depolarization following exposure to high K+ does.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Del Bigio MR,Omara F,Fedoroff S

doi

10.1097/00001756-199401000-00027

subject

Has Abstract

pub_date

1994-01-31 00:00:00

pages

639-41

issue

5

eissn

0959-4965

issn

1473-558X

journal_volume

5

pub_type

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