Cyclooxygenase-2 is induced globally in infarcted human brain.
Ann Neurol
; 43(6): 738-47, 1998 Jun.
Article
em En
| MEDLINE
| ID: mdl-9629843
ABSTRACT
Cyclooxygenase (COX) catalyzes synthesis of prostanoids after liberation of arachidonic acid, an important biochemical sequela of cerebral ischemia that aggravates brain injury. We investigated expression of inducible COX-2 in infarcted human brains (symptom duration, 15 hours to 18 days) and found that COX-2 protein was present in both neuronal and glial cells throughout the brain in accord with infarct topography and duration. These results emphasize the global yet temporally regulated nature of COX-2 induction during focal ischemia in humans, clearly different from the circumscribed acute expression reported in experimental animal models. We speculate that early induction of COX-2 may fuel tissue damage through prostanoids and free radicals, and delayed induction in remote brain areas may promote reconstitutive processes in the face of tissue scarring and remodeling of the surviving neural networks.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Encéfalo
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Infarto Cerebral
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Prostaglandina-Endoperóxido Sintases
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Isoenzimas
Limite:
Adult
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Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Ann Neurol
Ano de publicação:
1998
Tipo de documento:
Article