https://www.selleckchem.com/products/tl12-186.html Meanwhile, the systolic blood pressure was increased and diastolic blood pressure and arterial elastance were decreased after PF-04449613 treatment (P less then 0.05). (2) PF-04449613 (0.001, 0.01, 0.1, 1 μmol/L) significantly increased the left ventricular developed pressure (LVDP) in a concentration-dependent manner in vitro (P less then 0.05). (3) PF-04449613 (5 μmol/L) significantly increased the amplitude of SR Ca2+ transients mediated by facilitating sarcoplasmic reticulum Ca2+-ATPase-2a (SERCA2a) (P less then 0.05). (4) PF-04449613 (5 μmol/L) decreased the SR Ca2+ leak rate via ryanodine receptor 2 (RyR2) (P less then 0.05). In conclusion, PF-04449613 exerted positive inotropic effect both in vivo and in vitro by enhancing SERCA2a activity.The present study aims to investigate the effects of aerobic exercise and resistance exercise on lipid metabolism of skeletal muscle in high-fat diet (HFD)-induced insulin-resistant (IR) rats and the underlying mechanisms. Male Sprague-Dawley (SD) rats at age of 10 weeks were fed with HFD for 10 weeks to establish IR model. The IR rats were then randomly assigned into 3 groups, including IR control (IR) group, aerobic exercise (AE) group and resistance exercise (RE) group. An additional chow diet sedentary control (CON) group was used as well. Fasting blood glucose (FBG), insulin (FIN), glucagon and lipids, as well as triacylglycerol (TG), free fatty acids (FFA), and the protein expression of fatty acid translocase/cluster of differentiation 36 (FAT/CD36), carnitine palmitoyltransferase-1 (CPT-1), stearoyl-CoA desaturase-1 (SCD-1) and peroxisome proliferators-activated receptors γ (PPARγ) in skeletal muscles were measured after 8-week exercise interventions. The results showed that the contents of FBG, FIN, and LDL-C were increased by IR compared with CON group, and significantly decreased by aerobic exercise and resistance exercise; while aerobic exercise induced an increa