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由于微量元素的缺乏和氧化性应激反应的增加被认为是蛋白质能量营养不良的病因，故测定了３６个消瘦儿童和２４个营养良好儿童血清中硒、铜、锌的水平。消瘦儿童血清中硒、铜、锌水平显著地低于对照儿童。推断：血清微量元素的缺乏和氧化性应激反应的增加是消瘦病理生理的促成因素，恢复这些微量元素的含量对消瘦的治疗很重要。
Because of the lack of trace elements and the increase of oxidative stress response, which is thought to be the etiological factor of protein energy malnutrition, selenium, copper and zinc levels in sera of 36 wasting children and 24 children with good nutrition were measured. Serum selenium, copper, zinc levels were significantly lower than the control children. It is inferred that the lack of serum trace elements and the increase of oxidative stress response are the contributing factors of the pathophysiology of weight loss. Restoring the content of these trace elements is very important for the treatment of emaciation.