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Dexamethasone-induced hepatomegaly and steatosis in larval zebrafish

文献类型: 外文期刊

作者: Yin, Guojun 1 ; Cao, Liping 2 ; Du, Jinliang 2 ; Jia, Rui 2 ; Kitazawa, Takio 1 ; Kubota, Akira 3 ; Teraoka, Hiroki 1 ;

作者机构: 1.Rakuno Gakuen Univ, Sch Vet Med, Ebetsu, Hokkaido 0698501, Japan

2.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Minist Agr, Key Lab Freshwater Fisheries & Germplasm Resource, Wuxi 214081, Peoples R China

3.Obihiro Univ Agr & Vet Med, Diagnost Ctr Anim Hlth & Food Safety, Obihiro, Hokkaido 0808555, Japan

关键词: Glucocorticoid;Hepatomegaly;Liver;Steatosis;Zebrafish

期刊名称:JOURNAL OF TOXICOLOGICAL SCIENCES ( 影响因子:2.196; 五年影响因子:2.177 )

ISSN:

年卷期:

页码:

收录情况: SCI

摘要: Fish hepatobiliary syndrome, characterized by hepatomegaly and fatty liver, has been frequently reported in many cultured fish species and has caused a dramatic economic loss in China. Glucocorticoids are thought to be important non-nutritional factors for hepatomegaly and fatty liver development. In the present study, a dexamethasone-induced zebrafish model of fatty liver and hepatomegaly was established, and the role of glucocorticoid receptor (GR) in the development of hepatomegaly and fatty liver was investigated using developing zebrafish. Exposure of larval zebrafish at 5 days post fertilization (dpf) to dexamethasone for 24 hr caused significant increases of liver size and number of fish with hepatic steatosis at 6 dpf. The increase of liver size caused by dexamethasone was significantly reversed by treatment with RU486, a GR antagonist, and by gene knock-down with a morpholino against the GR. The dexamethasone-induced hepatic steatosis was also inhibited by treatment with RU486. Overall, the results highlight larval zebrafish as a useful model for stress-induced liver failure.

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