Abstract
We determined the effect of atorvastatin on myocardial apoptosis and caspase-8 activation following coronary microembolization (CME) in a rat model. For this, 50 rats were randomly and equally divided into CME; sham-operated (control); atorvastatin lavage; gastric lavage control; and caspase-8 inhibitor (CHO) groups. In CME animals, a microembolization ball was injected through the left ventricle. Sham animals were injected with normal saline (NS). Atorvastatin group received atorvastatin gastric lavage once-a-day, 1 week before surgery. Gastric lavage controls had similar lavage with NS. CHO group was i.p-injected (CHO: 10 mg/kg) 30 min before surgery. Cardiac indices in each group were determined by echocardiography 6-h postoperatively. TUNEL assay and western blot were used for myocardial apoptosis and expression of caspases-3/-8, respectively. Echocardiography data show that left ventricular ejection fraction (LVEF) in CME group was significantly decreased (P < 0.05) compared with sham controls. Besides, left ventricular fractional shortening (FS) and cardiac output (CO) were also decreased with an increase in left ventricular end-diastolic dimension (LVEDd). Atorvastatin and CHO animals had significantly improved (P < 0.05) cardiac function compared with CME group. Myocardial apoptosis and activation levels of caspases-3/-8 were significantly increased (P < 0.05) compared with sham; myocardial apoptosis and activation levels of caspases-3/-8 were significantly decreased (P < 0.05) in atorvastatin and CHO groups compared with CME group. In conclusion, atorvastatin pretreatment suppressed post-CME myocardial apoptosis and improved cardiac function through the blockade of a myocardial death receptor-mediated apoptotic pathway.
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We thank the National Natural Science Foundation of China for financial support (Grant No. 30760262/C030313).
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Li, L., Su, Q., Wang, Y. et al. Effect of Atorvastatin (Lipitor) on Myocardial Apoptosis and Caspase-8 Activation Following Coronary Microembolization. Cell Biochem Biophys 61, 399–406 (2011). https://doi.org/10.1007/s12013-011-9199-z
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DOI: https://doi.org/10.1007/s12013-011-9199-z