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The Effect of Knocked-Down Anti-Mullerian Hormone mRNA on Reproductive Characters of Male Nile Tilapia (Oreochromis niloticus) through Inhibition of the TGF-Beta Signaling Pathway

文献类型： 外文期刊

作者： Yan, Yue 1 ; Tao, Yifan 2 ; Cao, Zheming 2 ; Lu, Siqi 2 ; Xu, Pao 2 ; Qiang, Jun 1 ;

作者机构： 1.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Jiangsu, Peoples R China

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

关键词： Nile tilapia (Oreochromis niloticus); antisense RNA; Anti-Mullerian hormone mRNA inhibition; RNA sequencing; TGF-beta signaling pathway; regulatory mechanism

期刊名称：FISHES （ 影响因子：3.17； 五年影响因子：3.098 ）

ISSN：

年卷期： 2022 年 7 卷 5 期

页码：

收录情况： SCI

摘要： Anti-Mullerian hormone (amh), an important regulator of gonad development in male teleosts, regulates the development and differentiation of germ cells. We performed transcriptional knock-down of amh in Nile tilapia (Oreochromis niloticus) using antisense RNA technology, resulting in down-regulation in the expression of amh transcription and Amh protein in males. Compared with the control groups, the fish in treatment groups with down-regulated amh had increased weight and an extremely significant decrease in the gonadosomatic index. Hematoxylin-eosin staining revealed impaired testis development and significant reductions in numbers of sperm. Serum estradiol levels were significantly increased, and the levels of testosterone, luteinizing hormone, and follicle-stimulating hormone were significantly decreased. RNA-sequencing analysis of the fish in the down-regulated amh and control groups identified 12,048 differentially expressed genes, of which 1281 were up-regulated and 10,767 were down-regulated. Kyoto Encyclopedia of Genes and Genomes analysis revealed that differentially expressed genes related to growth and development were mainly enriched in the Cell cycle, Endocytosis, TGF-beta signaling pathway, Wnt signaling pathway, FoxO signaling pathway, Insulin signaling pathway, and MAPK signaling pathway. The RNA-sequencing data accuracy was verified by qRT-PCR analysis of the expression levels of selected differentially expressed genes. The abnormal TGF-beta signaling pathway may cause fish weight gain, testis dysplasia, and abnormal spermatogenesis: smad5, smad3a, tgfb2, tgfbr1b, gsdf, and amh were significantly down-regulated. These findings indicated that antisense RNA technology has strong application prospects and can specifically knock down amh in Nile tilapia, resulting in an abnormal TGF-beta signaling pathway, inhibiting testis development and inducing weight gain.

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