Estrogen Promotes Hepatic Synthesis of Long-Chain Polyunsaturated Fatty Acids by Regulating ELOVL5 at Post-Transcriptional Level in Laying Hens

International Journal of Molecular Sciences

卷:18

Cui-Cui Li¹  Xiang-Tao Kang¹  Hong Li¹  Meng Zhang¹  Gui-Rong Sun¹  Xiao-Jun Liu¹  Fang Li¹  Juan J. Loor² 

[1] College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China;

[2] Department of Animal Sciences and Division of Nutritional Sciences, University of Illinois, Urbana, IL 61801, USA;

关键词: chicken;    ELOVL5;    liver;    estrogen;    miRNA;    LCPUFA;   

DOI  :  10.3390/ijms18071405

来源: DOAJ

【 摘 要 】

The very long chain fatty acid elongase (ELOVL) plays an important role in the synthesis of long-chain polyunsaturated fatty acids (LCPUFA). Previous studies suggest that chicken could be an alternate source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). In this study, we detected that ELOVL5, which plays a key role in the biosynthesis of omega-3 (n-3) and omega-6 (n-6) polyunsaturated fatty acids (PUFA), was highly expressed in the liver of laying hens and increased rapidly after sexual maturity. Bioinformatic analysis revealed ELOVL fatty acid elongase 5 (ELOVL5) gene as a putative target of miR-218-5p, miR-19a-3p, miR-19b-3p, miR-30a-5p, miR-30b-5p, and miR-30e-5p. We demonstrated estrogen downregulated microRNA (miRNA), and that ELOVL5 is a direct target of miR-218-5p, which was located in intron 14 of the Slit guidance ligand 2 (SLIT2) gene and co-expressed with the host gene. Overall, estrogen enhanced hepatic synthesis of LCPUFA by functioning as a negative regulator of miRNA thereby augmenting the expression of these miRNA target genes, especially ELOVL5, which plays a key role in the biosynthesis of n-3 and n-6 LCPUFA. This study provides a novel model for the use of estrogen in the poultry industry as an inducer of ELOVL5 expression to enhance hepatic n-3 and n-6 LCPUFA synthesis at the post-transcriptional level.

【 授权许可】

Unknown