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The Wnt/beta-catenin pathway contributes to the regulation of adipocyte development induced by docosahexaenoic acid in grass carp, Ctenopharyngodon idellus

文献类型： 外文期刊

作者： Liu, Pin 1 ; Tian, Jing-jing 1 ; Ji, Hong 1 ; Sun, Jian 1 ; Li, Chao; Huang, Ji-qin 1 ; Li, Yang 1 ; Yu, Hai-bo 1 ; Yu, E 1 ;

作者机构： 1.Northwest A&F Univ, Coll Anim Sci & Technol, Yangling 712100, Peoples R China

2.Xianyang Normal Univ, Coll Chem & Chem Engn, Xianyang 712000, Peoples R China

3.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Trop & Subtrop Fishery Resource Applicat, Minist Agr, Guangzhou 510380, Guangdong, Peoples R China

4.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Ke

关键词： Docosahexaenoic acid;Ctenopharyngodon idellus;Adipocyte;Lipid accumulation;Wnt/beta-catenin signaling pathway

期刊名称：COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY （ 影响因子：2.231； 五年影响因子：2.215 ）

ISSN： 1096-4959

年卷期： 2018 年 216 卷

页码：

收录情况： SCI

摘要： Docosahexaenoic acid (DHA) has been suggested to inhibit adipogenesis in fish; the mechanism behind this observation remains largely unknown. The present study was to investigate the effects of DHA on the adipocyte differentiation of grass carp by using transcriptomic technology. Confluent primary cultured differentiating adipocytes were co-incubated with either 0 mu M or 100 mu M DHA for 2 days (early phase of differentiation) and 7 days (late phase). The results showed that 100 mu M DHA promoted adipogenesis at 2 days but decreased lipid accumulation at 7 days of treatment compared to that of the control. Cells treated with DHA for 2 days showed up-regulation of adipogenic genes, such as PPAR gamma, C/EBPs, and FAS; 7 day treatment showed down -regulation of these genes. Interestingly, beta-catenin, which plays important roles in suppressing adipogenesis in mammals, was also up-regulated after 7 days of treatment. To address this, administration of beta-catenin inhibitor FH535 was used and abolished the inhibition of the adipogenesis induced by DHA for 7 days. However, FH535 did not rescue the inhibition of adipogenic gene expression (including that of PPAR gamma, C/EBP beta, and C/EBP gamma) in the presence of 100 pM DHA, but it attenuated the up -regulation of beta-catenin downstream target genes, e.g. c-myc and cyc D1. This suggests that DHA might regulate the adipogenic junction through the beta-catenin pathway. Overall, our results demonstrate that continuous DHA treatment could promote the early step of adipocyte differentiation and suppress late phase adipogenesis in grass carp. Moreover, Wnt/beta-catenin might be a new potential signaling pathway by which DHA suppresses adipocyte development.

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[1]Grass carp (Ctenopharyngodon idellus) infected with multiple strains of Aeromonas hydrophila. Cao, Haipeng,Yang, Xianle,Zheng, Weidong. 2012

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[4]Identification and expression analysis of the g-type and c-type lysozymes in grass carp Ctenopharyngodon idellus. Ye, Xing,Zhang, Lili,Tian, Yuanyuan,Tan, Aiping,Bai, Junjie,Li, Shengjie,Zhang, Lili.

[5]Lipid contents in farmed fish are influenced by dietary DHA/EPA ratio: A study with the marine flatfish, tongue sole (Cynoglossus semilaevis). Xu, Houguo,Cao, Lin,Wei, Yuliang,Zhang, Yuanqin,Liang, Mengqing,Liang, Mengqing. 2018

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