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JOURNAL ARTICLE

Lycopus lucidus inhibits high glucose-induced vascular inflammation in human umbilical vein endothelial cells

Yun Jung Lee, Dae Gill Kang, Jin Sook Kim, Ho Sub Lee
Vascular Pharmacology 2008, 48 (1): 38-46
18083068
Vascular inflammatory process has been suggested to play a key role in the initiation and progression of atherosclerosis, a major complication of diabetes mellitus. Lycopus lucidus Turcz. has been used as an oriental traditional medicine including Korea and its crude drug is known to have an anti-inflammatory effect. Thus we investigated whether the aqueous extract of the leaves of L. lucidus Turcz. (ALT) suppresses vascular inflammatory process induced by high glucose in primary cultured human umbilical vein endothelial cells (HUVEC). Western blot analysis revealed that incubation of HUVEC with high glucose increased cell adhesion molecules (CAMs) expression levels. However, high glucose-induced increase of CAMs expression was significantly attenuated by pretreatment with ALT in a dose-dependent manner. The enhanced cell adhesion between monocyte and HUVEC induced by high glucose was also blocked by pretreatment with ALT. High glucose-induced hydrogen peroxide production and DCF-sensitive intracellular reactive oxygen species (ROS) formation. Pretreatment with ALT inhibited high glucose-induced ROS formation. In addition, ALT suppressed the translocation and promoter transcriptional activity of NF-kappaB increased in high glucose condition. Taken together, the present data suggested that ALT could suppress high glucose-induced vascular inflammatory process, which may be closely related with the inhibition of ROS and NF-kappaB activation in HUVEC.

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