Interaction of HIV-1 core p24 antigen with human monocytic cell line THP1 results in TNF-alpha dependent secretion of matrix metalloproteinase-9
Journal of the Korean Society for Microbiology
;
: 9-18, 2000.
Article
Dans Coréen
| WPRIM
| ID: wpr-48980
ABSTRACT
Immunological mechanisms involving the release of inflammatory factors by HIV-1 infected microglia in the brain have been implicated in the pathogenesis of HIV dementia (HIVD). Since the regulation of matrix metalloproteinases (MMPs) activity can be influenced by variety of inflammatory mediators, this study was undertaken to look for a correlation between the MMP-9 release and the production of TNF-alpha in response to HIV-1 p24 in the human monocyte cell line THP-1 as a model for microglia. First, it was shown that HIV-1 core p24 antigen induced THP-1 to secrete MMP-9 in a dose response manner while it elicited a little effect on MMP-2 release in human astroglial cell line T98G. Next, it was found that p24 induced THP-1 to secrete TNF-alpha without prior differentiation into macrophages by phorbol myristate acetate (PMA) treatment. Furthermore, anti-TNF-alpha neutralizing antibodies significantly blocked p24-induced MMP-9 release in a dose dependent manner. Our data indicate that p24 antigen induces monocytic MMP-9 release by triggering up-regulation of TNF-alpha secretion.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Encéphale
/
12-Myristate-13-acétate de phorbol
/
Monocytes
/
Régulation positive
/
Lignée cellulaire
/
Démence associée au SIDA
/
VIH-1 (Virus de l'Immunodéficience Humaine de type 1)
/
Facteur de nécrose tumorale alpha
/
Microglie
/
Matrix metalloproteinase 9
Type d'étude:
Étude pronostique
Limites du sujet:
Humains
langue:
Coréen
Texte intégral:
Journal of the Korean Society for Microbiology
Année:
2000
Type:
Article
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