Lactosylceramide Mediates the Expression of Adhesion Molecules in TNF-alpha and IFNgamma-stimulated Primary Cultured Astrocytes
The Korean Journal of Physiology and Pharmacology
; : 251-258, 2011.
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| ID: wpr-727876
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ABSTRACT
Here we have investigated how lactosylceramide (LacCer) modulates gene expression of adhesion molecules in TNF-alpha and IFNgamma (CM)-stimulated astrocytes. We have observed that stimulation of astrocytes with CM increased the gene expression of ICAM-1 and VCAM-1. D-Threo-1-phenyl- 2-decanoylamino-3-morpholino-1-propanol (PDMP) and N-butyldeoxynojirimycin (NBDNJ), inhibitors of glucosylceramide synthase (GLS) and LacCer synthase (galactosyltransferase, GalT-2), inhibited the gene expression of ICAM-1 and VCAM-1 and activation of their gene promoter induced by CM, which were reversed by exogenously supplied LacCer. Silencing of GalT-2 gene using its antisense oligonucleotides also attenuated CM-induced ICAM-1 and VCAM-1 expression, which were reversed by LacCer. PDMP treatment and silencing of GalT-2 gene significantly reduced CM-induced luciferase activities in NF-KB, AP-1, GAS, and STAT-3 luciferase vectors-transfected cells. In addition, LacCer reversed the inhibition of NF-KB and STAT-1 luciferase activities by PDMP. Taken together, our results suggest that LacCer may play a crucial role in the expression of ICAM-1 and VCAM-1 via modulating transcription factors, such as NF-KB, AP-1, STAT-1, and STAT-3 in CM-stimulated astrocytes.
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Asunto principal:
Factores de Transcripción
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Antígenos CD
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Expresión Génica
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Morfolinas
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Astrocitos
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FN-kappa B
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Oligonucleótidos Antisentido
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Factor de Necrosis Tumoral alfa
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1-Desoxinojirimicina
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Factor de Transcripción AP-1
Idioma:
En
Revista:
The Korean Journal of Physiology and Pharmacology
Año:
2011
Tipo del documento:
Article