Transcriptome analysis of Schizothorax oconnori (Cypriniformes: Cyprinidae) oocytes: The role of K+ in promoting yolk globule fusion and regulating oocyte maturation
文献类型： 外文期刊
作者： Zhou, Jianshe 1 ; Sun, Shuaijie 2 ; Li, Ruiting 2 ; Xu, Huifeng 2 ; Li, Ming 2 ; Li, Zhichao 2 ;
作者机构： 1.Tibet Acad Agr & Anim Husb Sci, Inst Fisheries Sci, Lhasa 850032, Peoples R China
2.Henan Agr Univ, Coll Anim Sci & Vet Med, Zhengzhou 450046, Henan, Peoples R China
关键词： Schizothorax oconnori; Transcriptome; Ovary maturation; Candidate genes; GABA
期刊名称：FISH PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：2.9； 五年影响因子：3.1 ）
ISSN： 0920-1742
年卷期： 2023 年
页码：
收录情况： SCI
摘要： Schizothorax oconnori (S. oconnori) is an economically important fish in Tibet. Oocyte maturation is a physiological process that is of great significance to reproduction and seed production in S. oconnori, yet little is currently known regarding the molecular mechanisms of oocyte development in this species. To identify candidate genes involved in reproduction of female fish, a combination of PacBio and Illumina HiSeq technologies was employed to provide deep coverage of the oocyte transcriptome. Transcriptome analysis revealed several candidate genes that are potentially involved in the regulation of oocyte maturation in S. oconnori, including GIRK1, CHRM3, NPY2R, GABRA3, GnRH3, mGluR1 alpha, GPER1, GDF9, HSP90, and ESR2. Genes that are significantly expressed during oocyte maturation mainly contribute to the GPCR signaling pathway and the estrogen signaling pathway. Neurotransmitter (Ach, NPY, and GABA) and peptide hormone (GnRH3) binding to G protein-coupled receptors (GPCRs) frees G-protein beta gamma subunits to interact with the G protein-gated inward rectifier K+ channel 1 (GIRK1). This process helps release K+ from granulosa cells to maturing oocytes, allowing yolk globule fusion. This mechanism may play an important role in oocyte maturation in S. oconnori. In conclusion, this study provides a valuable basis for deciphering the reproductive system in S. oconnori during the oocyte maturation process.
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