Neuroprotective effects of gelsolin during murine stroke.
J Clin Invest
; 103(3): 347-54, 1999 Feb.
Article
em En
| MEDLINE
| ID: mdl-9927495
ABSTRACT
Increased Ca2+ influx through activated N-methyl-D-aspartate (NMDA) receptors and voltage-dependent Ca2+ channels (VDCC) is a major determinant of cell injury following brain ischemia. The activity of these channels is modulated by dynamic changes in the actin cytoskeleton, which may occur, in part, through the actions of the actin filament-severing protein gelsolin. We show that gelsolin-null neurons have enhanced cell death and rapid, sustained elevation of Ca2+ levels following glucose/oxygen deprivation, as well as augmented cytosolic Ca2+ levels in nerve terminals following depolarization in vitro. Moreover, major increases in infarct size are seen in gelsolin-null mice after reversible middle cerebral artery occlusion, compared with controls. In addition, treatment with cytochalasin D, a fungal toxin that depolymerizes actin filaments, reduced the infarct size of both gelsolin-null and control mice to the same final volume. Hence, enhancement or mimicry of gelsolin activity may be neuroprotective during stroke.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Encéfalo
/
Transtornos Cerebrovasculares
/
Gelsolina
Limite:
Animals
Idioma:
En
Revista:
J Clin Invest
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Estados Unidos