1. Determination of arsenicals in mouse tissues after simulated exposure to arsenic from rice for sixteen weeks and the effects on histopathological features
- Author
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Jiating Wang, Heng Fang, Guiwei Zhang, Jinying Xie, Lianxian Guo, Linjie Yang, Zeheng Lin, and Yu Luo
- Subjects
Male ,medicine.medical_specialty ,Arsenites ,Health, Toxicology and Mutagenesis ,0211 other engineering and technologies ,chemistry.chemical_element ,02 engineering and technology ,010501 environmental sciences ,Kidney ,Body weight ,01 natural sciences ,Arsenicals ,Dietary Exposure ,Mice ,chemistry.chemical_compound ,Internal medicine ,Arsenic Poisoning ,medicine ,Animals ,Cacodylic Acid ,Arsenic ,0105 earth and related environmental sciences ,Arsenite ,021110 strategic, defence & security studies ,Liver and kidney ,Public Health, Environmental and Occupational Health ,Arsenate ,Oryza ,General Medicine ,Pollution ,Intestines ,Mice, Inbred C57BL ,medicine.anatomical_structure ,Endocrinology ,Liver ,chemistry ,Arsenates ,Composition (visual arts) - Abstract
The accumulation of arsenic in rice has become a worldwide concern. In this study, dose-dependency in tissues (intestine, liver and kidney) and blood distribution of inorganic arsenicals and their methylated metabolites were investigated in male C57BL/6 mice exposed to four arsenic species (arsenite [iAs]III, arsenate [iAs]V, monomethylarsonate [MMA]V, and dimethylarsinate [DMA]V) at four doses (control [C]: 0 μg/g, simulation [S]: 0.91 μg/g, medium [M]: 9.1 μg/g and high [H]: 30 μg/g) according to the arsenical composition in rice for 8 and 16 weeks. No adverse effects were observed, while body weight gain decreased in group H. Increases in total arsenic concentrations (CtAs) and histopathological changes in the tissues occurred in all of the test groups. CtAs presented a tendency of kidney > intestine > liver > blood and were time-/dose-dependent in the liver and kidney in groups M and H. In the intestine and blood, abundant iAs (23%–28% in blood and 36%–49% in intestine) was detected in groups M and H, and CtAs decreased in group H from the 8th week to the 16th week. PMI decreased in the liver and SMI decreased in the kidney. These results indicate that the three tissues are injured through food arsenic. The intestine can also accumulate food arsenic, and the high arsenic dose will cause a deficiency in the absorbing function of the intestine. Thus, long-term exposure to arsenic-contaminated rice should be taken seriously attention.
- Published
- 2020
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