cardiovascular system
• hearts show a significant decrease in p42/p44-MAPK (ERK1/2) phosphorylation both at baseline and during global ischemia and reperfusion (I/R)
|
• the maximal rate of systolic pressure development (dP/dT max) normalized to the end diastolic pressure (EDP) is significantly lower than that in wild-type hearts
• however, the average dP/dTmax and ejection fraction are relatively normal
|
• the maximal rate of relaxation (dP/dT min) normalized to the end diastolic pressure (EDP) is significantly lower than that in wild-type hearts
|
• Doppler echocardiography revealed that left ventricular (LV) posterior wall thickness at diastole (PWTD) is significantly higher than that in wild-type hearts
|
• following I/R, LVDP is significantly lower than that in wild-type hearts (17.7 +/- 3.9% versus 33.6 +/- 6.1%) with no differences in end diastolic pressure (EDP) or coronary flow (CF), indicating increased injury and reduced functional recovery
• however, baseline LVDP, EDP and CF are normal
|
• beat-to-beat systolic pressure (SP) normalized to the end diastolic pressure (EDP) is significantly lower than that in wild-type hearts
|
• following global I/R injury, myocardial infarct size is nearly doubled relative to that in wild-type hearts (45.1 +/- 2.9% versus 25.5 +/- 0.8%)
|
homeostasis/metabolism
• following global I/R injury, myocardial infarct size is nearly doubled relative to that in wild-type hearts (45.1 +/- 2.9% versus 25.5 +/- 0.8%)
|
• hearts show a significant increase in basal phospholamban (PLB) Thr17 phosphorylation, ATP2A2 (ATPase sarcoplasmic/endoplasmic reticulum Ca2+ transporting 2, aka SERCA2) expression and Jph2 (junctophilin-2) expression, suggesting a compensatory enhancement of sarcoplasmic reticulum Ca2+ uptake at baseline
|
muscle
• the maximal rate of systolic pressure development (dP/dT max) normalized to the end diastolic pressure (EDP) is significantly lower than that in wild-type hearts
• however, the average dP/dTmax and ejection fraction are relatively normal
|
• the maximal rate of relaxation (dP/dT min) normalized to the end diastolic pressure (EDP) is significantly lower than that in wild-type hearts
|
mortality/aging
N |
• mice are viable and overtly normal
|
reproductive system
N |
• mice are fertile
|