Su Jie, Xu Han-Ting, Yu Jing-Jing, Gao Jian-Li, Lei Jing, Yin Qiao-Shan, Li Bo, Pang Min-Xia, Su Min-Xia, Mi Wen-Jia, Chen Su-Hong, Lv Gui-Yuan
Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, China.
Wenzhou Medical University, Wenzhou, Zhejiang 325035, China.
Evid Based Complement Alternat Med. 2015;2015:364876. doi: 10.1155/2015/364876. Epub 2015 Sep 30.
Objectives. Preliminary researches showed that luteolin was used to treat hypertension. However, it is still unclear whether luteolin has effect on the hypertensive complication such as vascular remodeling. The present study was designed to investigate the effect of luteolin on the hypertensive vascular remodeling and its molecular mechanism. Method and Results. We evaluated the effect of luteolin on aorta thickening of hypertension in spontaneous hypertensive rats (SHRs) and found that luteolin could significantly decrease the blood pressure and media thickness of aorta in vivo. Luteolin could inhibit angiotensin II- (Ang II-) induced proliferation and migration of vascular smooth muscle cells (VSMCs). Dichlorofluorescein diacetate (DCFH-DA) staining result showed that luteolin reduced Ang II-stimulated ROS production in VSMCs. Furthermore, western blot and gelatin zymography results showed that luteolin treatment leaded to a decrease in ERK1/2, p-ERK1/2, p-p38, MMP2, and proliferating cell nuclear antigen (PCNA) protein level. Conclusion. These data support that luteolin can ameliorate hypertensive vascular remodeling by inhibiting the proliferation and migration of Ang II-induced VSMCs. Its mechanism is mediated by the regulation of MAPK signaling pathway and the production of ROS.
目的。初步研究表明,木犀草素可用于治疗高血压。然而,木犀草素对高血压并发症如血管重塑是否有作用仍不清楚。本研究旨在探讨木犀草素对高血压血管重塑的影响及其分子机制。方法与结果。我们评估了木犀草素对自发性高血压大鼠(SHRs)主动脉增厚的影响,发现木犀草素可显著降低体内血压和主动脉中膜厚度。木犀草素可抑制血管紧张素II(Ang II)诱导的血管平滑肌细胞(VSMCs)增殖和迁移。二氯荧光素二乙酸酯(DCFH-DA)染色结果表明,木犀草素可降低Ang II刺激的VSMCs中活性氧的产生。此外,蛋白质印迹法和明胶酶谱分析结果表明,木犀草素处理导致细胞外信号调节激酶1/2(ERK1/2)、磷酸化ERK1/2(p-ERK1/2)、磷酸化p38(p-p38)、基质金属蛋白酶2(MMP2)和增殖细胞核抗原(PCNA)蛋白水平降低。结论。这些数据支持木犀草素可通过抑制Ang II诱导的VSMCs增殖和迁移来改善高血压血管重塑。其机制是通过调节丝裂原活化蛋白激酶(MAPK)信号通路和活性氧的产生介导的。