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机构地区:[1]中国科学院上海生理研究所
出 处:《中国应用生理学杂志》1998年第1期17-21,共5页Chinese Journal of Applied Physiology
摘 要:本实验通过一个自制的用于低氧研究的装置,将细胞暴露于严重低氧条件下(PO2=5.3KPa)观察不同时间低氧和复氧时内皮细胞超微结构和存活率的变化。研究显示随低氧时间延长细胞存活率逐步降低,急性低氧后再复氧细胞存活率进一步降低。细胞超微结构损伤也随低氧时间延长逐步加重,低氧后再复氧超结构损伤程度进一步加重。实验观察到在急性低氧和复氧条件下,培养的牛主动脉内皮细胞超微结构损伤以脂质体和空泡的增加为其最明显特点,而不是线粒体和内质网等细胞器的肿胀和破裂。用SOD孵育(150μ/ml)能减少复氧引起的牛主动脉内皮细胞死亡(P<0.05),提示复氧时可能有超氧自由基产生,并在细胞损伤中起重要作用。? Exposure of endothelial cells to hypoxia(PO2=5.3KPa)in a special chamber for different periods of time,the ultrastructure of bovine aortic endothalial cells and cell viability were assessed.The cell viability decreased with time course of hypoxia,and decreased further after following reoxygenation.The ultrastructure also damaged gradually with time course of hypoxia and injuried more severe by reoxygenation.The result showed that the formation of lipied bodies and the increase of vacuoles be more sensitive changes than mitochondria and endoplasmic reticulums damaged in bovine aortic endothelial cells after acute hypoxia and reoxygenation.Superoxide dismutase(SOD)treatment supressed the cell death of bovine aortic endothelial cells induced by reoxygenation(P<0.05),which indicate that oxygen free radicals generate during hypoxia reoxygenation play an important role in cellular damage.
分 类 号:S852.33[农业科学—基础兽医学] R364.4[农业科学—兽医学]
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