山麦冬总氨基酸对大鼠实验性心肌缺血的保护作用

山麦冬总氨基酸(Tal5 mg·kg~(-1)iP)对垂体后叶索致大鼠心电图急性缺血性改变有明显的预防作用。在异丙肾上腺素引起的心肌损伤大鼠Tal10mg·kg~(-1),ip可对抗ST段升高,显著抑制心肌组织中磷酸肌酸激酶(CPK)的释放,降低血清CPK水平,保护心肌组织超氧化物歧化酶活性,减少丙二醛生成。在结扎冠脉的心肌梗塞大鼠,Tal15 mg·kg~(-1),ip明显抑制血清CPK和乳酸脱氨酶升高,降低血清游离脂肪酸水平,缩小心肌梗塞范围。实验结果表明,Tat对实验性心肌缺血有明显的保护作用。

Effects of total aminoacid of liriope spicata lour on experimental myocardial ischemia

We found previously that water soluble extract of Liriope spicata Lour (SanMaiDong) possesses cardioprotective action. The paper reported that effects of total aminoacid ex- traded from Liriope spicata Lour (Tal) on experimental myocardial ischemia in rats. The results indicate that Tal (5 mg·kg-1 ,ip) obviously antagonized ischemic ECG changes induced by pituitrin in rats. In myocardial ischemic rats caused by isoprenaline (8 mg·kg-1) Tal 15 mg· kg-1ip significantly reduced ST and decreased CPK release and lowered the content of MDA. In a myocardial ischemic mode) induced by ligat-ing the left anterior descending coronary artery in rats, Tal 15 mg·kg-1ip remarkably decreased plasma CPK and FFA levels and was found todiminish the infarct size. The ratio of its infarct size (5. 80%) is similar to that of propranolol (5. 41%),but apparently smaller than that of ligated group (18.55%). The results suggest that Tal can protect ischemic myocardium and this action may relate to the prevention of my-ocardial lipid peroxication and improvement of myocardial metabolism.