【摘要】 本研究观察了豆油和猪油对大鼠肺血管反应性和慢性低氧性肺动脉高压的影响。大鼠进高脂饮食2月后,常压缺氧14天。缺氧时吸入气O₂浓度为10±0.5%,每天缺氧8小时。结果喂含15%豆油的高脂饮食的大鼠的平均肺动脉压<（?）pa,肺血管阻力（PVR）和肺血管对急性缺氧的反应性（△PVR%）均显著高于缺氧对照组,右心室肥大也较缺氧对照组严重。喂含15%猪油的高脂饮食或含7.5%豆油加7.5%猪油的高脂饮食的大鼠的Ppa,PVR,△PVR%以及右心室肥大程度与缺氧对照组大鼠无明显差别。血粘度和红细胞压积在慢性常压缺氧后均增高,但不同的高脂饮食对其影响不大。实验结果提示,富含豆油的高脂饮食增强大鼠的低氧性肺血管收缩反应,加重慢性低氧性肺动脉高压和右心室肥大。更多还原

【Abstract】 The effect of dietary oils on pulmonary vasoreactivity and chronic hypoxic pulmonary hypertension were assessed in rats fed on soybean oil, pig oil, soybean oil plus pig oil or regular diets for two months before the start of normobaric hypoxia（10±0.5%O₂ ventilation, 8 hours per day, 14 days）. Mean pulmonary arterial pressures and pulmonary vasoreactivity to acute hypoxia were higher in the chronically hypoxic rats fed on 15% soybean oil than in the rats fed on 15% pig oil, 7.50% soybean oil plus 7.5% pig oil or regular diets. Hypertrophy of the right ventricle in the rats fed on 15% soybean oil were more serious as well. Blood viscosity and hematocrit were not different among the four groups of chronic hypoxia. The findings suggest that dietary soybean oil can potentiate hypoxic pulmonary vasoconstriction, and thereby promote the development of pulmonary hypertension and right ventricular hypertrophy.更多还原