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Interaction of methylmercury and selenium on the bioaccumulation and histopathology in medaka ( Oryzias latipes )
Author(s) -
Liao ChunYang,
Zhou QunFang,
Fu JianJie,
Shi JianBo,
Yuan ChunGang,
Jiang GuiBin
Publication year - 2007
Publication title -
environmental toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.813
H-Index - 77
eISSN - 1522-7278
pISSN - 1520-4081
DOI - 10.1002/tox.20236
Subject(s) - oryzias , methylmercury , selenium , bioaccumulation , chemistry , toxicity , environmental chemistry , histopathology , mercury (programming language) , toxicology , andrology , biology , biochemistry , pathology , organic chemistry , gene , medicine , computer science , programming language
Interaction of methylmercury and selenium in medaka ( Oryzias latipes ) on bioaccumulation of pollutants and histopathological changes in liver and gill were studied. Juvenile medaka fish were submitted to a series of waterborne methylmercury chloride (MMC), sodium selenite (Na 2 SeO 3 ) and their mixture for 210 days, respectively. The methylmercury (MeHg) and selenium contents in the whole body of medaka were determined. The dose‐ and time‐dependent increase of MeHg and selenium contents in medaka were observed. Histopathological changes, such as edema, vacuoles, pyknotic nucleus, and telangiectasis, could clearly be observed in the slices from the exposed medaka's liver and gill. Concurrent exposure to MMC and Na 2 SeO 3 showed the increased selenium accumulation. When the exposure molar ratio of MeHg:Se was about 1, the interaction between MeHg and selenium offered a limited protection against the serious intoxication of both MMC and Na 2 SeO 3 to medaka. © 2007 Wiley Periodicals, Inc. Environ Toxicol 22: 69–77, 2007.