Role of intracellular protein tyrosine kinase activation in vascular smooth muscle cells migration mediated by angiotensin Ⅱ
- VernacularTitle:血管紧张素Ⅱ诱导的血管平滑肌细胞迁移与胞浆蛋白酪氨酸激酶的激活
- Author:
Hao WU
;
Guoxiang HE
;
Tao JING
- Publication Type:Journal Article
- Keywords:
Vascular smooth muscle cells;
Angiotensin Ⅱ;
Protein tyrosine kinase;
Migration
- From:
Chinese Journal of Interventional Cardiology
1993;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the role of intracellular protein tyrosine kinase (PTK) activation in vascular smooth muscle cells (VSMCs) migration mediated by angiotensin Ⅱ (AngⅡ). Methods Intracellular PTK activities were investigated by means of ?- 32 P incorperation in cultured rat VSMCs stimulated by AngⅡ. The migrated VSMCs were enumerated in a modified Boyden Chamber. Results Without any specific stimulus, only a few migrated cells were detected. However, the number of migrated cells were increased, under the condition of AngⅡ at the concentration of 1?10 -10 , 1?10 -9 , 1?10 -8 , 1?10 -7 and 1?10 -6 mol/L, by 3.7, 4.6, 5.9, 6.6 and 6.3 times respectively, compared with the control group. Intracellular PTK activities were also increased by 1.0,1.7,2.4,3.2 and 2.4 times compared with the control group, under the condition of AngⅡ at the concentration of 1?10 -10 , 1?10 -9 , 1?10 -8 , 1?10 -7 and 1?10 -6 mol/L, respectively. Statistical analysis showed that there was a significant positive correlation between AngⅡ-induced VSMCs migration and intracellular PTK activation. Correspondingly, PTK inhibitor Genistein significantly reduced AngⅡ-induced VSMCs movement ( P
