应激对锌营养状况评价指标的影响

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为了认识近年国内外研究的一些功能指标在评价机体锌营养状况时的特异性,我们以实验大鼠为模型,观察了强迫游泳、饥饿、创伤和乙醇中毒等因素对一些锌营养状况指标的影响。实验结果显示,创伤使血浆锌显著下降,饥饿3天血浆锌明显增高。肝锌含量在创伤和饥饿条件下都出现升高趋势。乙醇中毒动物除血管紧张肽转换酶以外,红细胞超氧化物歧化酶、血浆碱性磷酸酶、甘露糖苷酶和5′-核苷酸酶活性明显降低。饥饿引起碱性磷酸酶和血管紧张肽转换酶活性下降,甘露糖苷酶活性明显升高。创伤和游泳分别导致血管紧张肽转换酶活性下降和5′-核苷酸酶活性升高。这些结果表明,用上述功能指标评价机体锌营养状况时,和用血清(浆)锌指标一样,需排除某些生理和病理因素的影响。 In order to understand the specificity of some functional indexes studied in domestic and abroad in assessing zinc nutritional status of the body, we used experimental rats as models and observed the effects of forced swimming, starvation, trauma and alcoholism on some nutritional status indicators . The experimental results show that the trauma caused a significant decrease in plasma zinc, plasma zinc significantly increased 3 days after starvation. Liver and liver Zn content increased under the conditions of trauma and hunger. In addition to angiotensin converting enzyme, the activity of erythrocyte superoxide dismutase, plasma alkaline phosphatase, mannosidase and 5’-nucleotidase in ethanol poisoning animals was significantly decreased. Starvation caused alkaline phosphatase and angiotensin converting enzyme activity decreased, mannosidase activity was significantly increased. Trauma and swimming lead to a decrease in angiotensin converting enzyme activity and an increase in 5’-nucleotidase activity, respectively. These results indicate that the use of these functional indicators to assess the status of zinc nutrition in the body, as with the serum (pulp) zinc indicators, the need to rule out the impact of certain physiological and pathological factors.
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