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Assessment of Iron Bioavailability in Ten Kinds of Chinese Wheat Flours Using an in vitro Digestion/Caco-2 cell Model

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biomedical and environmental Sciences 2012年第5期25卷 502-508页

作者： LEI Ji ZHANG Yong CHEN Xiang Gui ZHANG Ming Qiu BAI Lin HUANG Cheng Yu Ortiz Monasterio IVAN School of Bioengineering Xihua UniversityChengdu 610039SichuanChina West China School Of PublicHealth Sichuan UniversityChengdu 610041SichuanChina Institute of Crop Science Chinese Academy ofAgricultural SciencesBeijing 100081China international Maize and Wheat Improvement Center(CIMMYT) 06600 MexicoD.F.Mexico

Abstract Objective To compare iron bioavailability （Fe BV） from ten selected kinds of Chinese wheat flours in order to provide scientific basis for further human trials and enable plant breeding programs to screen biofortified wheat cultivars. Methods An in vitro digestion/Caco-2 cell model was used to assess Fe BV of ten flour samples from six leading Chinese wheat cultivars and the stability of Fe BV in one cultivar was studied across three growing environments. Results Significant differences were observed in both Fe BV and Fe bioavailability per gram of food （Fe BVPG） among cultivars （P〈0.01） grown at the same location with the same flour extraction rate. Zhongyou 9507 and Jingdong 8 had Fe BV 37%-54% and Fe BVP（3 103%-154% higher than the reference control. In the Anyang environment, Zhongyou 9507 had a higher wheat flour-Fe level and Fe BVPG. Differences in Fe BV were detected in cultivars with different flour extraction rates. Conclusion Zhongyou 9507 and Jingdong 8 were identified as the most promising cultivars for further evaluation of efficacy by using human subjects. The growing environments had no effect on Fe BV, but did have a significant effect on Fe BVPG. Fe bioavailabilities in low-extraction （40%） flours were higher than those in high-extraction （78%） flours.

关键词： Iron biofortification, Bioavailability Caco-2 cells

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