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DECREASE IN MYOCARDIAL POLYAMINE CONCENTRATION IN RATS WITH MYOCARDIAL INFARCTION

机译:心肌梗塞大鼠心肌多胺浓度降低

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Cardiac polyamines are thought to protect the myocardium against harmful stimuli and to be regulated by sympathetic nerve activation. In the present study, polyamines concentrations in non-infarcted myocardium were investigated. Myocardial polyamines contents decreased significantly in the non-infarcted regions by day 3 in rats with myocardial infarction compared with sham-operated rats and with the untreated control rats. The cardiac catecholamine concentration decreased by day 1 after myocardial infarction. Myocardial ornithine decarboxylase activity also decreased in the non-infarcted regions ; suggesting that the decrease in cardiac polyamines contents relate to an insufficiency of the ornithine decarboxylase activity in rats with myocardial infarction. These results suggest that the decrease in polyamines concentrations after myocardial infarction is associated with functional sympathetic nerve denervation and that the vulnerability of the heart after myocardial infarction may be due to a decrease in polyamine concentrations in the non-infarcted region. [References: 22]
机译:心脏多胺被认为可以保护心肌免受有害刺激,并由交感神经激活来调节。在本研究中,研究了非梗塞心肌中多胺的浓度。与假手术大鼠和未治疗的对照大鼠相比,到第3天,患有心肌梗塞的大鼠中非梗塞区域的心肌多胺含量显着降低。心肌梗塞后第1天心脏儿茶酚胺浓度降低。非梗死区心肌鸟氨酸脱羧酶活性也降低;提示心脏多胺含量的降低与心肌梗死大鼠鸟氨酸脱羧酶活性不足有关。这些结果表明,心肌梗死后多胺浓度的降低与交感神经功能失调有关,心肌梗死后心脏的脆弱性可能是由于非梗死区域中多胺浓度的降低。 [参考:22]

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