克山病病区粮中多元素含量及构成对动物致病作用的研究

本实验用克山病病区产粮、非病区产粮和合成饲料喂养大鼠,采用功能和形态学等多项指标,综合观察克山病病区产粮对动物的致病作用。结果表明,病区粮可致动物心肌坏死、心肌线粒体损伤、肝脂肪变性、心肝组织中自由基和脂质过氧化物含量显著升高和三磷酸腺苷及总能量水平显著低于对照组;病区粮组饲料以及动物血液、心肌、肝、褐脂、肾等组织脏器中,多元素含量及构成均明显有别于对照组,多因素统计分析结果显示,Se、Mo、Cu、Mn、Cr、Fe、Zn、Pr等八个危险因子。即在低硒背景下,硒与上述元素的构成模式可能是病区粮对动物致病作用的复合因素,为进一步探索克山病病因提供了依据和具体线索。

AN EXPERIMENTAL STUDY OF THE PATHOGENIC EFFECTS OF MULTIELEMENT CONTENTS AND ITS PATTERNS IN FEEDS FROM KESHAN DISEASE AREA IN RATS

The pathogenic effects of crops from Keshan disease area were studied by rat-feeding. As double controls, another two groups were fed with crops from non-endemic area and synthetic diet. Those from disease area caused necrosis of heart muscle vascular changes of myocardial mitochondria and fatty degeneration of liver. Compared with the controls, the free radical and lipid peroxide content in heart and liver were significantly higher, while the ATP and AN contents in these organs were apparently lower. The multielement contents and its constituent patterns in the feeds, whole blood, heart, liver, kidney and brown adipose tissue of rats in experimetal group were apparently different from those in the control groups. The statistic analysis of multiple factors showed that eight elements Se, Mo, Cu, Mn, Cr, Fe, Zn and Pr might be the perilous factors, that is, under the condition of low selenium, the constituent pattern of selenium and the eight elements might be the complicated factors of endemic crops.