Journal of Environmental Toxicology 2006;21(2):103-113.
원유의 노출이 담치와 조피볼락의 phase II 약물대사효소 UDP-glucoronosyl transferase 및 glutathione S-transferase의 활성에 미치는 영향
박관하, 김주완, 박음미, 임철원, 최민순, 최선남, 황인영, 김정상
Activity Changes in Phase II Drug-metabolizing Enzymes UDP-Glucoronosyl Transferase and Glutathione S-Transferase to Crude Oil Exposure in Mussel and Rockfish
This study examined effects of crude oil on the phase II drug-metabolizing enzymes UDP-glucuronosyl transferase (UDPGT) and glutathione S-transferase (GST) in mussel Mytilus edulis and rockfish Sebastes schlegeli, a representative bivalve and a culture fish, respectively. This work also intended indirectly to evaluate the post impact recovery from the massive oil tanker spillage accidents occurred during the summer of 1995 in the sea area off Yosu City, Chonnam. For these, enzyme activities of UDPGT and GST were examined in the fish and mussel following laboratory exposure to fresh crude oil, weathered oil, field-obtained oil residues, or in the field biota samples. Decreased GST activity was observed in rock fish following exposure to oil-soluble fraction (OSF) of fresh oil. A similar diminished GST activity was also observed after OSF of artificially weathered oil. OSF of field oil residues retrieved from the spillage area approximately 1 year later also exerted a slight inhibition of GST to rockfish. There was neither a change in UDPGT in rockfish, nor were there changes in mussel in both enzymes to any oil fractions. We could not observe any difference in the two enzymes either in rockfish or mussel sampled from the field during 1.5~2.0 years post spillage, indicating that their enzyme systems might had been recovered by the sampling time. In conclusion, it seems that the inhibition of GST activity in rockfish is a biomarker response to crude oil exposure. The results, however, must be interpreted with care, as the inhibition may reflect various factors such as oil concentration, duration and water temperature.
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