Effects of bile acids on proliferation and production of proteinase activity of Uronema marinum(Ciliophora: Scuticociliatida)

Diseases of Aquatic Organisms

Sung Koo Kim¹  Su Kyung Choi¹  Ki Hong Kim¹  Seung Hyuk Choi¹  Hyoung Jun Kim¹  Min Sun Kim¹  Yoon Kwon Nam¹ 

关键词: Uronema marinum;    Bile acids;    Proliferation;    Proteases;   

DOI  :  10.3354/dao062245

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: Little is known about the effects of bile acids in relation to infectivity on the biological characteristics of Uronema marinum, a serious opportunistic parasite of farmed olive flounder Paralichthys olivaceus. In this study, weexamined the effects of bile acids on the proliferation of U. marinum and on proteinase production in vitro. Proliferation of U. marinum was significantly enhanced by lithocholic acid (LCA) at 30 and 60 µmol, and bychenodeoxycholic acid (CDCA) at 0.06 µmol. In contrast, a significant decrease in proliferation was observed with cholic acid (CA) at 30 and 60 µmol, and with deoxycholic acid (DCA) at all amounts used. Proteinase production from live U.marinum was significantly increased by LCA, whereas CA significantly decreased proteinase production. CDCA and DCA had no effect on proteinase production. Although the types and concentrations of bile acids in the faeces of olive flounder are notknown, the present results suggest that bile acids in the culturing water might influence the proliferation and production of proteinases in U. marinum, resulting in an increased possibility of scuticociliatosis in olive flounder farms.

【 授权许可】

Unknown