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Role of Thyroid Hormone in Dynamic Variation of gdf6a Gene during Metamorphosis of Paralichthys olivaceus

文献类型： 外文期刊

作者： Shi, Yaxin 1 ; Qiu, Junqiang 1 ; Li, Xike 1 ; Lin, Yue 1 ; Li, Wenjuan 1 ; Hou, Jilun 3 ; Fu, Yuanshuai 1 ; Yamada, Eijiro 1 ; Matsumoto, Shunichi 1 ;

作者机构： 1.Shanghai Ocean Univ, Key Lab Freshwater Aquat Genet Resources, Minist Agr & Rural Affairs, Shanghai 201306, Peoples R China

2.Shanghai Ocean Univ, Key Lab Explorat & Utilizat Aquat Genet Resources, Minist Educ, Shanghai 201306, Peoples R China

3.Chinese Acad Fishery Sci, Hebei Key Lab Bohai Sea Fish Germplasm Resources C, Beidaihe Cent Expt Stn, Qinhuangdao 066100, Peoples R China

关键词： Paralichthys olivaceus; gdf6a; thyroid hormone; thyroid hormone receptor; metamorphosis

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN： 1661-6596

年卷期： 2024 年 25 卷 1 期

页码：

收录情况： SCI

摘要： The Japanese flounder (Paralichthys olivaceus) is a marine fish that undergoes a dramatic postembryonic metamorphosis, with the right eye shifting to the left and its lifestyle transitioning from planktonic to benthic. As the light environment of the habitat changes from bright to dim, its photoreceptor system also undergoes adaptive change. Growth differentiation factor 6a (Gdf6a) is a member of the BMP family, which plays a key role in regulating the dorsal-ventral pattern of the retina and photoreceptor fate, and the differentiation of different photoreceptors is also modulated by a thyroid hormone (TH) binding its receptor (TR). However, the relationship between gdf6a and TH and its role in the regulation of photoreceptors during flounder metamorphosis is still poorly understood. In this study, bioinformatics analysis showed that Gdf6a had a conserved TGFB structural domain and clusters with fishes. The expression analysis showed that the expression of gdf6a was highest in the eye tissue of adult flounder and tended to increase and then decrease during metamorphosis, reaching its highest levels at the peak of metamorphosis. Moreover, the expression of gdf6a increased in the early stages of metamorphosis after exogenous TH treatment, while it was inhibited after exogenous thiourea (a TH inhibitor, TU) treatment. To further investigate the targeting role of TH and gdf6a in the metamorphosis of flounder, the results of the Dual-Luciferase revealed that triiodothyronine (T3) may regulate the expression of gdf6a through TR beta. In conclusion, we speculate that TH influences the development of cone photoreceptors during the metamorphosis of the flounder by regulating the expression of gdf6a.

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