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观察缺锌儿童血清维生素Ａ（ＶｉｔＡ）含量和５＇核苷酸酶（５＇－ＮＴ）活性的变化。结果表明，缺锌儿童血清ＶｉｔＡ含量和５＇－ＮＴ活性显著低于健康对照者（Ｐ＜０．００１）。锌剂治疗两月后，随着血清锌水平的提高，ＶｉｔＡ含量和５＇－ＮＴ活性明显升高。提示缺锌可影响小儿体内ＶｉｔＡ和核酸代谢。
The changes of serum vitamin A (VitA) and 5 ’nucleotidase (5’-NT) activity in children with zinc deficiency were observed. The results showed that the serum VitA level and 5’-NT activity in zinc deficient children were significantly lower than those in healthy controls (P <0.001). After two months of zinc treatment, with the increase of serum zinc level, the activity of VitA and 5’-NT increased significantly. Tip zinc deficiency can affect VitA and nucleic acid metabolism in children.