Objective:To study the effects of phentolamine on myocardial extracellular matrix of cardiac remodeling induced by norepinephrine in rats.Methods:24 SD rats were divided into 3 groups randomly:control groups,norepinep...Objective:To study the effects of phentolamine on myocardial extracellular matrix of cardiac remodeling induced by norepinephrine in rats.Methods:24 SD rats were divided into 3 groups randomly:control groups,norepinephrine groups(model groups),norepinephrine +phentolamine groups(treatment groups).Echocardiography was used to detect changes in cardiac structure and function,the level of collagen volume fraction(CVF) and hydroxy-proline as well as collagen content were determined in myocardial tissue,matrix metalloproteinases-2 and collagen Ⅰin myocardial tissue were localized by immunohistochemitry.Results:Compared with control groups,left ventricular hypertrophy in the model group rats,the livdioxyproline content and CVF was significantly higher(P<0.01),and matrix metalloproteinase- 2 and collagen Ⅰ protein expression was significantly increased(P<0.01).Phentolamine significantly improved cardiac hypertrophy in treatment group rats,reduced hydroxy-proline,CVF,matrix metalloproteinase 2and collagen Ⅰ protein expression(P<0.05).Conclusions:Phentolamine can effectively reduce the incidence of myocardial hypertrophy and myocardial extracellular matrix remodeling in SD rats,and it can ease myocardial extracellular matrix of cardiac remodeling.It may he associated with reduced expression of matrix metalloproteinase 2 and collagen Ⅰ in myocardial tissue remodeling.展开更多
The effects of phentolamine on hemorrheology and hemodynamics were studied in dogs with acute liver damage induced by acetaminophen. After 1 h of phentolamine application , the viscosity of plasma and whole blood was ...The effects of phentolamine on hemorrheology and hemodynamics were studied in dogs with acute liver damage induced by acetaminophen. After 1 h of phentolamine application , the viscosity of plasma and whole blood was significantly diminished. The hematocrit readings followed the same pattern as the alterations in viscosity. The portal venous resistance and the value of K were remarkably decreased and the portal venous blood flow was obviously increased. It can be assumed , therefore , that the decrease in viscosity induced by phentolamine results from internal hemodilution and phentolamine may improve hepatic blood circulation through the decrease of portal venous resistance caused by the reduction of blood viscosity and the dilation of portal vascular beds.展开更多
Objective: To study the curative effect of silybin combined with pituitrin-phentolamine for pulmonary tuberculosis complicated by acute hemoptysis. Methods: A total of 78 patients with pulmonary tuberculosis complicat...Objective: To study the curative effect of silybin combined with pituitrin-phentolamine for pulmonary tuberculosis complicated by acute hemoptysis. Methods: A total of 78 patients with pulmonary tuberculosis complicated by acute hemoptysis who were treated in this hospital between December 2013 and April 2017 were divided into control group (n=39) and silybin group (n=39) by random number table. Control group received pituitrin-phentolamine hemostasis therapy, silybin group received pituitrin-phentolamine combined with silybin therapy, both were treated for 1 week. The differences in peripheral blood liver function and coagulation index levels as well as serum oxidative stress index contents were compared between the two groups of patients before treatment and after 1 week of treatment. Results:Before treatment, the differences in peripheral blood liver function and coagulation index levels as well as serum oxidative stress index contents were not statistically significant between the two groups. After 1 week of treatment, peripheral blood liver function indexes ALT, AST, ALP and STB contents of silybin group were lower than those of control group;peripheral blood coagulation indexes PT, APTT and TT levels were lower than those of control group whereas Fib level was higher than that of control group;serum oxidative stress indexes AOPPs and LHP contents were lower than those of control group whereas GSH-Px and T-AOC contents were higher than those of control group. Conclusion: pituitrin-phentolamine combined with silybin therapy can effectively protect the liver function, optimize the coagulation function and reduce the oxidative stress response in patients with pulmonary tuberculosis complicated by acute hemoptysis.展开更多
基金supported by Jiangsu Province Natural Science Foundationof China:v2716298
文摘Objective:To study the effects of phentolamine on myocardial extracellular matrix of cardiac remodeling induced by norepinephrine in rats.Methods:24 SD rats were divided into 3 groups randomly:control groups,norepinephrine groups(model groups),norepinephrine +phentolamine groups(treatment groups).Echocardiography was used to detect changes in cardiac structure and function,the level of collagen volume fraction(CVF) and hydroxy-proline as well as collagen content were determined in myocardial tissue,matrix metalloproteinases-2 and collagen Ⅰin myocardial tissue were localized by immunohistochemitry.Results:Compared with control groups,left ventricular hypertrophy in the model group rats,the livdioxyproline content and CVF was significantly higher(P<0.01),and matrix metalloproteinase- 2 and collagen Ⅰ protein expression was significantly increased(P<0.01).Phentolamine significantly improved cardiac hypertrophy in treatment group rats,reduced hydroxy-proline,CVF,matrix metalloproteinase 2and collagen Ⅰ protein expression(P<0.05).Conclusions:Phentolamine can effectively reduce the incidence of myocardial hypertrophy and myocardial extracellular matrix remodeling in SD rats,and it can ease myocardial extracellular matrix of cardiac remodeling.It may he associated with reduced expression of matrix metalloproteinase 2 and collagen Ⅰ in myocardial tissue remodeling.
文摘The effects of phentolamine on hemorrheology and hemodynamics were studied in dogs with acute liver damage induced by acetaminophen. After 1 h of phentolamine application , the viscosity of plasma and whole blood was significantly diminished. The hematocrit readings followed the same pattern as the alterations in viscosity. The portal venous resistance and the value of K were remarkably decreased and the portal venous blood flow was obviously increased. It can be assumed , therefore , that the decrease in viscosity induced by phentolamine results from internal hemodilution and phentolamine may improve hepatic blood circulation through the decrease of portal venous resistance caused by the reduction of blood viscosity and the dilation of portal vascular beds.
文摘Objective: To study the curative effect of silybin combined with pituitrin-phentolamine for pulmonary tuberculosis complicated by acute hemoptysis. Methods: A total of 78 patients with pulmonary tuberculosis complicated by acute hemoptysis who were treated in this hospital between December 2013 and April 2017 were divided into control group (n=39) and silybin group (n=39) by random number table. Control group received pituitrin-phentolamine hemostasis therapy, silybin group received pituitrin-phentolamine combined with silybin therapy, both were treated for 1 week. The differences in peripheral blood liver function and coagulation index levels as well as serum oxidative stress index contents were compared between the two groups of patients before treatment and after 1 week of treatment. Results:Before treatment, the differences in peripheral blood liver function and coagulation index levels as well as serum oxidative stress index contents were not statistically significant between the two groups. After 1 week of treatment, peripheral blood liver function indexes ALT, AST, ALP and STB contents of silybin group were lower than those of control group;peripheral blood coagulation indexes PT, APTT and TT levels were lower than those of control group whereas Fib level was higher than that of control group;serum oxidative stress indexes AOPPs and LHP contents were lower than those of control group whereas GSH-Px and T-AOC contents were higher than those of control group. Conclusion: pituitrin-phentolamine combined with silybin therapy can effectively protect the liver function, optimize the coagulation function and reduce the oxidative stress response in patients with pulmonary tuberculosis complicated by acute hemoptysis.
