Cardiac dysfunction, cardiac remodeling and alterations in protein content of phospho- ERK1, ERK2 and ELK1 in rats following the induction of heart failure by VO with or without ENP and LOS treatment for 16 weeks

ParametersControlVOVO + ENPVO + LOS
A. Cardiac remodeling
Heart wt (mg)1364 ± 412209 ± 117*1671 ± 971526 ± 105
LV wt (mg)1067 ± 291640 ± 142*1217 ± 611119 ± 66
RV wt (mg)300 ± 13554 ± 42*462 ± 25394 ± 36
HW/BW ratio (mg/g)2.23 ± 0.133.37 ± 0.14*2.68 ± 0.142.47 ± 0.17
B. Phospho-ERK1 and phospho-ERK2 content as well as ERK1/ERK2 activity
Phospho-ERK1 (% of control)100552 ± 81*309 ± 40127 ± 40
Phospho-ERK2 (% of control)100572 ± 52*312 ± 26131 ± 30
Phospho-ELK1 (% of control)100777 ± 28*144 ± 2187 ± 28
C. Cardiac function
LVSP (mm Hg)115 ± 585 ± 2*91 ± 693 ± 7
LVEDP (mm Hg)5.2 ± 1.428.0 ± 1.9*18.6 ± 1.513.8 ± 0.6
+ dP/dt (mm Hg/sec)10,000 ± 4294752 ± 240*6995 ± 3647989 ± 88
− dP/dt (mm Hg/sec)10,208 ± 5114724 ± 259*7638 ± 3808068 ± 409

Values are mean ± SE of 8 hearts in each group. VO: volume overload; LV wt: left ventricular weight; RV wt: right ventricular wt; BW: body weight; HW: heart weight. Data are based on the analysis of the information in Table 2 and Figures 3, 4 and 5 in our paper Zhang et al. J Cardiovasc Pharmacol Ther. 2010;15:84–92 [168]. *P < 0.05 compared with control; P < 0.05 compared with VO group