The growth-related gene product beta induces sphingomyelin hydrolysis and activation of c-Jun N-terminal kinase in rat cerebellar granule neurones.
J Biol Chem
; 274(51): 36537-43, 1999 Dec 17.
Article
em En
| MEDLINE
| ID: mdl-10593952
ABSTRACT
The growth-related gene product beta (GRObeta) is a small chemoattractant cytokine that belongs to the CXC chemokine family, and GRObeta receptors are expressed in the brain, including the cerebellum. We demonstrate that rat cerebellar granule neurones express the GRObeta receptor CXCR2. We also show that, in addition to the known stimulation of a phosphoinositide-specific phospholipase C, GRObeta activates both neutral (N-) and acidic (A-) sphingomyelinases (SMase) and the stress-activated c-Jun N-terminal kinase 1 (JNK1). Although both exogenous ceramide and bacterial SMase stimulate JNK1, GRObeta-induced JNK1 activation is an event probably independent of ceramide generated by A-SMase, since it is maintained in the presence of compounds that block A-SMase activity. This is the first report on the activation of the SMase pathway by chemokines.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esfingomielinas
/
Cerebelo
/
Fatores Quimiotáticos
/
Substâncias de Crescimento
/
Quimiocinas CXC
/
Proteínas Quinases Ativadas por Mitógeno
/
Peptídeos e Proteínas de Sinalização Intercelular
/
Neurônios
Limite:
Animals
Idioma:
En
Revista:
J Biol Chem
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Itália