摘要
Objective： To study protective effect of insulin against cardiomyocyte apoptosis in anoxia/reoxygenation （A/R） injury of neonatal rat. Methods： The model of A/R injury was finished through receiving anoxia for 2h and reoxygenation for 4h in cultured cardiomyocytes of neonatal rat. The cardiomyocytes were divided randomly into 3 groups： control group （CON）, anoxia/reoxygenation group （A/R） and insulin-treated group （INS）. At the end of reoxygenation of 4 hours, activities of lactate dehydrogenase （LDH）, contents of malondiaidehyde （MDA）, were assessed through spectrophotometric procedures, myocyte apoptosis were detected through TUNEL and DNA Ladder. Results： MDA, LDH, and Apoptosis Index were significantly decreased in INS group compared with A/R group （P〈0.01）. Conclusion： Insulin has a protective effect against A/R injury in cultured cardiomyocyte of neonatal rat; the protective mechanism may contribute to antiapoptosis of insulin.
Objective： To study protective effect of insulin against cardiomyocyte apoptosis in anoxia/reoxygenation （A/R） injury of neonatal rat. Methods： The model of A/R injury was finished through receiving anoxia for 2h and reoxygenation for 4h in cultured cardiomyocytes of neonatal rat. The cardiomyocytes were divided randomly into 3 groups： control group （CON）, anoxia/reoxygenation group （A/R） and insulin-treated group （INS）. At the end of reoxygenation of 4 hours, activities of lactate dehydrogenase （LDH）, contents of malondiaidehyde （MDA）, were assessed through spectrophotometric procedures, myocyte apoptosis were detected through TUNEL and DNA Ladder. Results： MDA, LDH, and Apoptosis Index were significantly decreased in INS group compared with A/R group （P〈0.01）. Conclusion： Insulin has a protective effect against A/R injury in cultured cardiomyocyte of neonatal rat; the protective mechanism may contribute to antiapoptosis of insulin.
