[Effect of Huoxue injection on oxidized low-density lipoprotein induced activation of human umbilical vein endothelial cells].
OBJECTIVE
To observe effect of Huoxue injection on the expression of intercellular cell adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1), the adherence of monocytes to endothelial cells, and the regulation role of nuclear factor kappa B (NF-kappaB) in cultured human umbilical vein endothelial cells (HUVEC) injury induced by the oxidized low-density lipoprotein (ox-LDL).


METHODS
The ox-LDL (100 mg x L(-1)) was added to the cultured HUVEC to prepare the injury model of HUVEC. The adhesive percentage between HUVEC treated with ox-LDL and monocytes was determined by protein quantification. Expression of mRNA and protein of ICAM-1 and VCAM-1 were determined by RT-PCR and flow cytometry respectively. The percentage of positive cells and the ratio of nuclei and cytoplasm of NF-kappaB p65 staining in HUVEC the were examined by cell immunochemistry.


RESULTS
Treatment of HUVEC with ox-LDL for 12, 24 hours significantly increased adhesion of monocytes to HUVEC and enhanced the expressions of mRNA and protein of ICAM-1 and VCAM-1. The percentage of positive cells and the ratio of nuclei and cytoplasm of NF-kappaB p65 staining in HUVEC were significantly increased after treatment with ox-LDL for 24 hours. Huo Xue Injection could significantly inhibit the adhesion between monocyte and HUVEC, the expression of mRNA and protein of ICAM-1 and VCAM-1, and declined the percentage of positive cells and the ratio of nuclei and cytoplasm of NF-kappaB p65 staining in HUVEC. The effects were strengthened with increasing the deal of Huoxue injection.


CONCLUSIONS
Huoxue injection has an inhibitory effect on the adherence of monocytes to HUVEC, probably by way of down-regulating the expression of mRNA and protein of ICAM-1 and VCAM-1 in HUVEC. The mechanism is probably associated with inhibiting the activation of NF-kappaB p65 of HUVEC. The effects of Huoxue injection can bring about the protective effect to endothelial cells injury induced by ox-LDL.
Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Qixue Laboratory, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China.
Ling-Qun
LQ
Zhu
Shuo-Ren
SR
Wang
Ming-Jing
MJ
Zhao
Wei
W
Cui
Fu-Ling
FL
Niu
D000818:Animals; D002448:Cell Adhesion / Q000187:drug effects; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage* / Q000494:pharmacology*; D042783:Endothelial Cells / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism*; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D007267:Injections; D018799:Intercellular Adhesion Molecule-1 / Q000235:genetics; D008077:Lipoproteins, LDL / Q000378:metabolism*; D009000:Monocytes / Q000166:cytology / Q000187:drug effects; D016328:NF-kappa B / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D014471:Umbilical Veins / Q000166:cytology*; D019010:Vascular Cell Adhesion Molecule-1 / Q000235:genetics
D004365:Drugs, Chinese Herbal; D008077:Lipoproteins, LDL; D016328:NF-kappa B; D012333:RNA, Messenger; D019010:Vascular Cell Adhesion Molecule-1; C099252:oxidized low density lipoprotein; D018799:Intercellular Adhesion Molecule-1