文章基本信息

标题：Absorption of Zinc from Dietary Casein Phosphopeptide Complex with Zinc in Rats Given a Soybean Protein-Based Diet
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作者：Tohru MATSUI ; Hiroaki OKUMURA ; Hideo YANO 等
期刊名称：Journal of Nutritional Science and Vitaminology
印刷版ISSN：0301-4800
电子版ISSN：1881-7742
出版年度：2002
卷号：48
期号：3
页码：247-250
DOI：10.3177/jnsv.48.247
出版社：Center for Academic Publications Japan
摘要：The absorption of zinc (Zn) in the form of casein phosphopeptide (CPP) complex was compared with that of its chloride form in rats given a soybean protein-based diet. We prepared 67Zn complex with CPP (⁶⁷Zn-CPP). Male rats were given a diet containing ZnCl₂ in the preliminary period. After overnight food deprivation, they were fed a test meal labeled ⁶⁷Zn-CPP or ⁶⁷ZnCl₂ (4gZn-free diet +0.12mg ⁶⁷Zn) with 0.5mg Dysprosium (Dy) as a fecal marker. Feces were collected for 5d and analyzed for ⁶⁷Zn isotopic enrichment and Dy concentration with an inductively coupled plasma mass spectrometer. Fecal Dy excretion closely paralleled that of ⁶⁷Zn, and more than 89% of the administered Dy was recovered in the feces collected for 5d. Moreover, the Zn source did not affect the excretion pattern of ⁶⁷Zn. Since Dy and ⁶⁷Zn were almost excreted within 3 d after the administration, the apparent absorption of ⁶⁷Zn was calculated from the pooled data for 3d. The source of Zn did not affect the apparent absorption of ⁶⁷Zn. These results suggested that dietary Zn in the form of CPP complex did not show higher absorbability in rats.
关键词：zin absorption;casein phosphopeptide;stable isotope;rat