Cardiac performance, status of RAS, oxidative stress and subcellular activities in 8 weeks diabetic rats with or without ENP and LOS treatments

ParametersControlDiabeticDiabetic + ENPDiabetic + LOS
A. Cardiac function parameters
LVSP (mm Hg)140 ± 12.185 ± 8.4*119 ± 7.6116 ± 6.9
+ dP/dt (mm Hg/sec)8856 ± 8155380 ± 621*7176 ± 7027044 ± 516
B. RAS activities
Plasma ANG II (fmol/ml)7.2 ± 0.87.4 ± 0.56.4 ± 0.610.9 ± 0.4
Plasma ACE activity (nmol/min per ml)48 ± 2.552 ± 3.149 ± 3.557 ± 2.6
LV ACE activity (nmol/min per mg)0.57 ± 0.030.89 ± 0.04*0.56 ± 0.30.79 ± 0.03
C. Oxidative stress levels
LV GSH/GSSG Ratio6.8 ± 0.42.5 ± 0.2*4.3 ± 0.54.8 ± 0.2
MDA content (nmol/mg tissue lipids)3.8 ± 0.137.1 ± 0.49*4.9 ± 0.465.4 ± 0.48
D. Myosin ATPase activities
Mg2+-ATPase (nmol Pi/mg per 5 min)1.2 ± 0.030.78 ± 0.07*1.06 ± 0.051.00 ± 0.06
Ca2+-ATPase (nmol Pi/mg per 5 min)6.22 ± 0.183.14 ± 0.21*4.91 ± 0.234.86±0.28
E. SL activities
Na+-K+-ATPase (μmol Pi/mg per h)23.2 ± 3.513.1 ± 1.8*18.2 ± 1.618.3 ± 1.5
Na+-Ca2+-exchanger (nmol Ca2+/mg per 10s)21.3 ± 1.212.1 ± 0.9*17.3 ± 1.216.1 ± 1.5
F. SR activities
Ca2+-stimulated ATPase (nmol Pi/mg per 5 min)165 ± 7115 ± 10*154 ± 5153 ± 6
Ca2+-uptake (nmol Ca2+/mg per 2 min)62.7 ± 2.336.5 ± 3.1*50.3 ± 2.153.4 ± 2.7

Values are mean SE of 6 to 8 animals in each group. Data are based on the analysis of the information in Tables 1 and 2 in our paper Liu et al. Ann. N.Y. Acad Sci. 2006;1084:141–54 [174] and Figures 1A, 3B, 5A and 6A in our paper Machackova et al. Mol Cell Biochem. 2004;261:271–8 [175]. *Significantly different (P < 0.05) from control; Significantly different (P < 0.05) from untreated diabetic