Biomedical Research

Qiliqiangxin (QL) has protective effect for the cardiovascular diseases treatment. This study aim to evaluate the effect of QL on the cell viability, cell apoptosis and caspase-3 activity in oxidized LDL (oxLDL)-induced Human Coronary Artery Endothelial Cells (HCAECs). HCAECs were treated with QL (0-1μg/ml) and oxLDL (150 μg/ml). The HCAECs viability was detected by cell proliferation assay and Lactate Dehydrogenase (LDH) release assay. The HCAECs apoptosis was evaluated by the annexin V-FITC assay. The activity of caspase-3 of HCAECs was measured by colorimetric caspase-3 assay. Cell migration assay and capillary-like tube formation assay on Matrigel were performed. Treatment of HCAECs to ox-LDL (150 μg/ml) decreased cell viability, stimulated apoptosis and enhanced caspase-3 activity. In addition, treatment with QL (0.5 μg/ml) alone did not affect cell viability and LDH release. Furthermore, the treatment with QL (0.5 μg/ml) significantly increased ox-LDL (150 μg/ml) decreased cell viability. Treatment with QL (0.5 μg/ml) reduced ox-LDL-stimulated apoptosis and caspase-3 activity in HCAECs in a dose-dependent manner. QL (0.5 μg/ml) attenuated ox-LDL (150 μg/ml) abolished cell migration and tube formation. Our study demonstrated that QL prevents ox-LDLinduced HCAECs injury by decreasing the apoptosis via caspase-3 activity.

Author(s): Changjiang Du, Haiqin Lv, Guangyuan Meng, Xiujuan Wang, Haijun Cao
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