Effects of notoginsenoside R1 on AngⅡ induced proliferation of MOVAS cells and AT1R/MAPKs signaling pathway

ObjectiveTo investigate the effects of notoginsenoside R1 （NR1） on the proliferation of mice aortic smooth muscle cells （MOVAS cells） induced by angiotensinⅡ （AngⅡ） and the signal pathway of angiotensin Ⅱ type 1 receptor （AT1R） / mitogen activated protein kinases （MAPKs）.

MethodsThe proliferation of MOVAS cells was detected by BrdU method after AngⅡ induction. Western blot was used to detect the expression of the two main receptors of AngⅡ （AT1R and AT2R） and MAPKs pathway related proteins （ERK， p38， and JNK）.

Results（1） AngⅡ （5 μmol/L） could promote the proliferation of MOVAS cells （P<0.01）. NR1 （50 μmol/L） could inhibit the proliferation of MOVAS cells induced by AngⅡ （P<0.01）. There was no significant difference between control group and NR1 group （P>0.05）. （2） Compared with AngⅡ group， the expression of AT1R protein in AngⅡ+ NR1 group was significantly lower （P<0.05）， but there was no difference in the expression of AT2R protein （P>0.05）. （3） NR1 could significantly inhibit the phosphorylation of ERK， p38 and JNK protein after AngⅡ stimulation （P<0.01）.

ConclusionNR1 can inhibit the proliferation of MOVAS cells induced by AngⅡ， which may be related to down regulating AT1R and inhibiting the activation of MAPKs.