However, the concentration of CK-MB of the HTN group was significantly lower than that of the sham group. The levels of the CK-MB of the type 2 diabetes+HTN group were significantly higher and lower than those of the HTN and type 2 diabetes groups, respectively. Myocardial Infarct Size The infarct size of the type 2 diabetes group was significantly higher than that of the type 2 diabetes control group, but the infarct size of the HTN group was significantly lower than that of the sham group (table 1). Moreover, the infarct size of the type 2 diabetes+HTN group Inhibitors,research,lifescience,medical was significantly higher and lower than those of the
HTN and type 2 diabetes groups, respectively. Discussion The main objective of the present study was to examine Inhibitors,research,lifescience,medical the effects of simultaneous short-term learn more renovascular hypertension and experimental type 2 diabetes on rat cardiac functions using the Langendorff technique. Our results revealed that short-term renovascular hypertension attenuated the diabetes-induced cardiac impairment. The findings of the
present study also indicated that the present model of experimental type 2 diabetes was associated with impaired cardiac function, characterized by decreased HR, LVDP, +dp/dt, -dp/dt, and RPP as well as with increased infarct size and coronary effluent CK-MB. Such findings are in Inhibitors,research,lifescience,medical agreement with those of some other studies1,15,16 and indicative of cardiomyopathy.16,17 The mechanism of type 2 diabetes-induced cardiac impairment is not clearly known. However, such an impairment has been attributed to defects in Na+/H+ and Na+/Ca2+ exchangers,18 Inhibitors,research,lifescience,medical calcium ion metabolism,19 chronic hyperglycemia (which could affect the expression of some specific genes that encode potassium channel proteins), or increased oxidative stress and apoptosis in the myocardial cells.20,21 Our results showed that the present model of Inhibitors,research,lifescience,medical short-term renovascular hypertension was associated
with improved cardiac function, characterized by increased HR, LVDP, +dp/dt, -dp/dt, and RPP as well as with decreased myocardial infarct size and coronary artery CK-MB. There are no previous reports on the protective effects of short-term two-kidney, one-clip renovascular hypertension on cardiac Casein kinase 1 performance using the Langendorff technique. Moreover, the effects of other models of hypertension on cardiac functions have not been widely investigated, and there is no agreement in the findings of the published studies. Averill et al.22 reported that 9-week two-kidney, one-clip hypertension impaired cardiac performance in rats by impairing stroke volume, cardiac output, and stroke work. Moreover, cardiac performances were also lower in 6-week two-kidney, one-clip renovascular hypertensive rats.