文献类型： 外文期刊
第一作者： Zhou, Tong
作者： Zhou, Tong;Cao, Jizeng;Chen, Guobin;Wang, Yubin;Zou, Guiwei;Liang, Hongwei;Cao, Jizeng
作者机构：
关键词： gonadal differentiation; Pelodiscus sinensis; Sox3; RNAi; sex reversal
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 Chinese soft-shelled turtle Pelodiscus sinensis, an economically important species in China, exhibits significant sexual dimorphism. Males are more valuable than females owing to their wider calipash and faster growth. Estradiol (E2)-induced sex reversal is used to achieve all-male breeding of turtles; however, the mechanism of this sex reversal remains unclear. In this study, we characterized the Sox3 gene, whose expression level was high in the gonads and brain and exhibited significant sexual dimorphism in the ovary. During embryonic development, Sox3 was highly expressed at the initiation of ovarian differentiation. E2 and Sox3-RNAi treatment before sexual differentiation led to 1352, 908, 990, 1011, and 975 differentially expressed genes in five developmental stages, respectively, compared with only E2 treatment. The differentially expressed genes were clustered into 20 classes. The continuously downregulated and upregulated genes during gonadal differentiation were categorized into Class 0 (n = 271) and Class 19 (n = 606), respectively. KEGG enrichment analysis showed that Sox3 significantly affected sexual differentiation via the Wnt, TGF-beta, and TNF signaling pathways and mRNA surveillance pathway. The expression of genes involved in these signaling pathways, such as Dkk4, Nog, Msi1, and Krt14, changed significantly during gonadal differentiation. In conclusion, the deletion of Sox3 may lead to significant upregulation of the mRNA surveillance pathway and TNF and Ras signaling pathways and downregulation of the Wnt and TGF-beta signaling pathways, inhibiting E2-induced sex reversal. These findings suggest that Sox3 may play a certain promoting effect during E2-induced sex reversal in P. sinensis.
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