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KMID : 0613820100200101490
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Journal of Life Science
2010 Volume.20 No. 10 p.1490 ~ p.1497
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Effects of Cadmium Exposure on Tissues of Carassius auratus
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Shin Myung-Ja
Kwon O-Chang
Lee Jong-Eun
Seo Eul-Won
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Abstract
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The present study aimed to investigate the level of accumulated heavy metal in various tissues of Carassius auratus after exposure to Cadmium (Cd), histologically and physiologically. After treating C. auratus with Cd, the accumulated Cd in gill tissues was detected to be of the highest content, and showed the lowest content in integument tissues. Also, Cd content increased in a time dependent manner and showed the highest accumulation in the tissues exposed for 20 days. Antioxidant enzyme activities showedhigher activity in the gill and integument than in the kidney and liver tissues. In the case of SOD, antioxidation activity of SOD in all Cd exposed tissues was higher than in unexposed tissues. The activities of SOD and CAT also became higher after Cd exposure. Gill tissues exposed to Cd showed an increased number of mucous cells between lamella in a time dependent manner. In addition, the gills showed morphological changes such as edema, exfoliation of epithelial cells, and fusion of the secondary lamellae. Also, exposure to Cd for 20 days had an effect on gill tissues, causing membrane damage in the mitochondria and nucleus. In kidney tissues, atrophied glomerulus was observed, and the empty space in Bowman"s capsule was wider.
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KEYWORD
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Cadmium, antioxidant enzyme, heavy metal, Carassius auratus
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