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Bioaccumulation of Heavy Metals in Intestine of Nacella concinna

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Bioaccumulation of Heavy Metals in Intestine of Nacella concinna
Other Titles
남극삿갓조개(Nacella concinna)장의 중금속 축적에 관한 연구
Lee, Yong-Seok
Han, Yeon Soo
Ahn, In-Young
Kho, Weon-Gyu
Jo, Yonghun
Nacella concinna; Heavy metals; Metallothionein; SEM-EDS; Biomarker.; Fisheries
Issue Date
Lee, Yong-Seok, et al. 2006. "Bioaccumulation of Heavy Metals in Intestine of Nacella concinna". The Malacological Society Of Korea, 22(1): 87-95.
Immunohistochemical and ultrastuructural experi- ments were conducted to find out heavy metal accumulation in the intestine of an Antarctic gastropod Nacella concinna. According to the immuno- histochemical experiment the apical cytoplasm of the intestinal epithelium showed positive reactions to anti-MT (metallothionein), indicating the presence of MT, a metal-binding protein involved in metal detoxifying process. In the transmission electron microscopic observations, the epithelial cells of the intestine exposed to Cd for over three hours showed irregular nuclear membranes, secretory granules, and probable metal granules. According to the SEM-EDS experiments on the intestine, concentration of Pb in the apical epithelium was in inverse proportion to that in the intestinal lumen. After exposing to Cd for over three days, S was rapidly reduced. Ca and Zn were rapidly increased after exposure to Cd. These elements are supposed to be concerned with the MT-reaction in the intestine. Taken together, these data suggest that N. concinna could be used as a potential biomarker species.
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