Role of Caveolin-1 in Indomethacin-induced Death of Human Hepatoadenocarcinoma SK-Hep1 Cells
The Korean Journal of Physiology and Pharmacology
;
: 143-148, 2008.
Article
Dans Anglais
| WPRIM
| ID: wpr-728594
ABSTRACT
Caveolin-1 (CAV1) is an integral membrane protein that may function as a scaffold for plasma membrane proteins and acts as a tumor suppressor protein. One causative factor of chemotherapy- resistant cancers is P-plycoprotein (P-gp), the product of the multidrug resistance-1 gene (MDR1), which is localized in the caveolar structure. Currently, the interactive roles of CAV1 and MDR1 expression in the death of cancer cells remain controversial. In this study, we investigated the effects of indomethacin on the cell viability and the expression levels of MDR1 mRNA and protein in a CAV1- siRNA-mediated gene knockdown hepatoma cell line (SK-Hep1). Cell viability was significantly decreased in CAV1-siRNA-transfected cells compared with that of control-siRNA-transfected cells. Furthermore, the viability of cells pretreated with CAV1 siRNA was markedly decreased by treatment with indomethacin (400micrometer for 24 h). However, the protein and mRNA levels of MDR1 were unchanged in CAV1-siRNA-transfected cells. These results suggest that CAV1 plays an important role as a major survival enzyme in cancer cells, and indomethacin can sensitively induce cell death under conditions of reduced CAV1 expression, independent of MDR1 expression.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
ARN messager
/
Protéines
/
Lignée cellulaire
/
Membrane cellulaire
/
Survie cellulaire
/
Indométacine
/
Mort cellulaire
/
Carcinome hépatocellulaire
/
Petit ARN interférent
/
Cavéoline-1
Limites du sujet:
Humains
langue:
Anglais
Texte intégral:
The Korean Journal of Physiology and Pharmacology
Année:
2008
Type:
Article
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