期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 200, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2020.110742
关键词
Arsenic; Rice; Food exposure; Injuries; Intestine
资金
- National Natural Science Foundation of China [81303155]
- Natural Science Foundation of Guangdong Province [2018A030313094, 2020A1515010457]
- Social Science and Technology Development Project of Dongguan [20185071521641]
- Group-type Special Supporting Project for Educational Talents in Universities [4SG19046G]
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 mu g/g, simulation [S]: 0.91 mu g/g, medium [M]: 9.1 mu g/g and high [H]: 30 mu g/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 (C-tAs) and histopathological changes in the tissues occurred in all of the test groups. C-tAs 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 C-tAs 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.
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