血管紧张素转换酶存在于肺、肾、脑、眼球、小肠、胎盘等组织的血管内皮细胞或上皮细胞及血浆、尿等体液中,其中以肺组织含量最高。许多学者对在慢性缺氧条件下此酶的研究颇感兴趣,有些人认为低氧能刺激此酶的合成系统,而使此酶在肺组织和血清中含量增加;也有人报道低氧使血管紧张素Ⅱ含量减少;但直接测定此酶活性的报道尚少。本实验目的是观察慢性间断缺氧对大鼠 Angiotensin converting enzyme exists in the vascular endothelial cells or epithelial cells such as lung, kidney, brain, eyeball, small intestine, placenta and plasma, urine and other body fluids, of which the highest content of lung tissue. Many scholars are quite interested in the study of this enzyme under chronic hypoxia. Some people think that hypoxia can stimulate the synthesis system of this enzyme to increase the content of this enzyme in lung tissue and serum. It has also been reported that hypoxia causes blood vessels Tensorin II decreased; but the direct determination of this enzyme activity is still little reported. The purpose of this experiment is to observe chronic intermittent hypoxia in rats