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Sesamol attenuates isoproterenol-induced acute myocardial infarction via inhibition of matrix metalloproteinase-2 and -9 expression in rats

机译:芝麻酚通过抑制大鼠基质金属蛋白酶-2和-9的表达减轻异丙肾上腺素引起的急性心肌梗塞

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Background/Aims: The protective role of sesamol and its possible action against isoproterenol-induced myocardial injury and infarction is unknown. We tested the hypothesis that sesamol's protection against myocardial infarction is associated with the inhibition of matrix metalloproteinase (MMP)-2 and MMP-9. Methods: Four groups of experimental rats were subcutaneously injected with sesamol (0, 1, 3, or 10 mg/kg) and then, 2 h later, intraperitoneally injected with isoproterenol (100 mg/kg 24 h apart on 2 consecutive days) to induce myocardial infarction. Control rats were treated with saline only. Blood pressure (BP), heart rate (HR), and electrocardiography (ECG) wave durations, serum creatine phosphokinase isoenzymes (CKMB), lactate dehydrogenase (LDH), myocardial histology, MMP-2, and MMP-9 were assessed 24 h after the last dose of isoproterenol was given. Results: BP was lower, and HR, ECG wave durations, CKMB, LDH, myocardial injury, MMP-2, and MMP-9 levels were higher in experimental rats than in control rats. BP was significantly higher, and all the other parameters were significantly lower in the rats treated with sesamol than in those treated with isoproterenol only. Conclusions: Sesamol effectively prevented myocardial infarction, at least in part, by controlling proteolytic activities and the expression of MMP-2 and -9 in isoproterenol-treated rats.
机译:背景/目的:芝麻酚的保护作用及其对异丙肾上腺素引起的心肌损伤和梗塞的可能作用尚不清楚。我们测试了以下假设:芝麻酚对心肌梗塞的保护与基质金属蛋白酶(MMP)-2和MMP-9的抑制有关。方法:四组实验大鼠皮下注射芝麻酚(0、1、3或10 mg / kg),然后在2小时后腹膜内注射异丙肾上腺素(100 mg / kg,连续2天间隔24小时)。诱发心肌梗塞。对照大鼠仅用盐水治疗。在24小时后评估血压(BP),心率(HR)和心电图(ECG)波时长,血清肌酸磷酸激酶同工酶(CKMB),乳酸脱氢酶(LDH),心肌组织学,MMP-2和MMP-9最后一次服用异丙肾上腺素。结果:实验大鼠的血压较低,HR,ECG波时长,CKMB,LDH,心肌损伤,MMP-2和MMP-9水平高于对照组。与仅用异丙肾上腺素治疗的大鼠相比,用芝麻酚治疗的大鼠的BP明显更高,而所有其他参数均显着降低。结论:芝麻酚可通过控制蛋白水解活性以及异丙肾上腺素处理的大鼠中的蛋白水解活性以及MMP-2和-9的表达,至少部分有效地预防心肌梗塞。

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