Cadmium oral bioavailability is affected by calcium and phytate contents in food: Evidence from leafy vegetables in mice

文献类型： 外文期刊

第一作者： Wang, Meng-Yu

作者： Wang, Meng-Yu;Li, Meng-Ya;Ning, Han;Xue, Rong-Yue;Liang, Jia-Hui;Li, Hong-Bo;Wang, Ning;Luo, Xiao-San;Li, Gang;Juhasz, Albert L.;Ma, Lena Q.

作者机构：

关键词： Leafy vegetables; Cadmium; Bioavailability; Calcium; Phytate

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：14.224； 五年影响因子：12.984 ）

ISSN： 0304-3894

年卷期： 2022 年 424 卷

页码：

收录情况： SCI

摘要： To test high cadmium (Cd) concentration may not be high in health risk when considering Cd bioavailability, we assessed variation of Cd relative bioavailability (RBA, relative to CdCl2) using a mouse assay for 14 vegetables of water spinach, amaranth, and pakchoi. Cadmium concentration varied from 0.13 +/- 0.01-0.37 +/- 0.00 mu g g(-1) fw. Cadmium-RBA also varied significantly from 22.9 +/- 2.12-77.2 +/- 4.46%, however, the variation was overall opposite to that of Cd concentration, as indicated by a strong negative correlation between Cd-RBA and Cd concentration (R-2 = 0.43). Based on both Cd concentration and bioavailability, the identified high-Cd pakchoi variety resulted in significantly lower Cd intake than the high-Cd varieties of water spinach and amaranth (4.74 +/- 0.05 vs. 10.1 +/- 0.54 and 8.03 +/- 0.04 mu g kg(-1) bw week(-1)) due to significantly lower Cd-RBA (22.9 +/- 2.12 vs. 77.2 +/- 4.46 and 51.3 +/- 2.93%). The lower Cd-RBA in pakchoi was due to its significantly higher Ca and lower phytate concentrations, which facilitated the role of Ca in inhibiting intestinal Cd absorption. This was ascertained by observation of decreased Cd-RBA (90.5 +/- 12.0% to 63.5 +/- 5.53%) for a water spinach when elevating its Ca concentration by 30% with foliar Ca application. Our results suggest that to assess food Cd risk, both total Cd and Cd bioavailability should be considered.

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