Abstract
The mechanisms of sex determination and differentiation have not been elucidated in most fish species. In this study, the full-length cDNAs of DAX1 was cloned and characterized in aquaculture fish Chinese loach (Paramisgurnus dabryanus), designated as Pd-DAX1. The cDNA sequence of Pd-DAX1 was 1261 bp, including 795 bp open reading frame (ORF) encoding 264 amino acids. Pd-DAX1 shares highly identical sequence with DAX1 homologues from different species. The expression profiles of Pd-DAX1 in different developmental stages and diverse adult tissues were analyzed by quantitative real-time RT-PCR and in situ hybridization (ISH). Pd-DAX1 was continuously expressed during embryogenesis, with the extensive distribution in the development of the central nervous system. Tissue distribution analysis revealed that Pd-DAX1 expressed widely in adult tissues, with the highest expression level found in testis, moderate level in ovary, showing a sex-dimorphic expression pattern. Pd-DAX1 mainly located in spermatogonia cells, spermatocytes, primary oocytes and previtellogenic oocyte cells, implying that Pd-DAX1 may involve in gametogenesis. These preliminary findings suggest that Pd-DAX1 gene is highly conserved during vertebrate evolution and involved in a wide range of developmental processes including embryogenesis, central nervous system development and gonad development.
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Funding
This work is supported by grants from the National Natural Science Foundation of China (no. 31200923), Young Core Instructor Foundation of Henan Normal University (no. 5101049470610) and Program for Innovative Research Team (in Science and Technology) in University of Henan Province (no. 17IRTSTHN017).
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Animal maintenance and handling procedures followed the recommendations of the Association of Animal Behaviour and national regulations (Anonymous 2012).
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Xia, X., Huo, W., Wan, R. et al. Cloning, characterization and function analysis of DAX1 in Chinese loach (Paramisgurnus dabryanus). Genetica 146, 487–496 (2018). https://doi.org/10.1007/s10709-018-0039-6
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DOI: https://doi.org/10.1007/s10709-018-0039-6