ROS-related enzyme expressions in endothelial cells regulated by tea polyphenols / 生物医学与环境科学(英文)
Biomedical and Environmental Sciences
;
(12): 33-39, 2004.
Article
Dans Anglais
| WPRIM
| ID: wpr-329657
ABSTRACT
<p><b>OBJECTIVE</b>Elevation of reactive oxygen species (ROS), especially the level of superoxide is a key event in many forms of cardiovascular diseases. To study the mechanism of tea polyphenols against cardiovascular diseases, we observed the expressions of ROS-related enzymes in endothelial cells.</p><p><b>METHODS</b>Tea polyphenols were co-incubated with bovine carotid artery endothelial cells (BCAECs) in vitro and intracellular NADPH oxidase subunits p22phox and p67phox, SOD-1, and catalase protein were detected using Western blot method.</p><p><b>RESULTS</b>Tea polyphenols of 0.4 microg/mL and 4.0 microg/mL (from either green tea or black tea) down-regulated NADPH oxidase p22phox and p67phox expressions in a dose-negative manner (P < 0.05), and up-regulated the expressions of catalase (P < 0.05).</p><p><b>CONCLUSIONS</b>Tea polyphenols regulate the enzymes involved in ROS production and elimination in endothelial cells, and may be beneficial to the prevention of endothelial cell dysfunction and the development of cardiovascular diseases.</p>
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Protéines de transport membranaire
/
Pharmacologie
/
Phénols
/
Phosphoprotéines
/
Superoxide dismutase
/
Flavonoïdes
/
Artères carotides
/
Catalase
/
Régulation négative
/
Régulation positive
Limites du sujet:
Animaux
langue:
Anglais
Texte intégral:
Biomedical and Environmental Sciences
Année:
2004
Type:
Article
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