Asprosin regulates male reproduction in teleosts: in vitro study in Channa punctata

生物 受体 基因 毛皮 内科学 内分泌学 遗传学 生物化学 医学
作者
Priyanka Sathoria,Bhawna Chuphal,Umesh Rai,Brototi Roy
出处
期刊:Journal of Endocrinology [Bioscientifica]
标识
DOI:10.1530/joe-24-0146
摘要

The novel adipokine asprosin produced by the furin enzymatic cleavage of profibrillin 1 protein (encoded by the Fbn1 gene) is implicated in regulating many physiological functions including reproduction in mammals. In males, asprosin is reported to increase sperm density, sperm motility, and steroid production by interacting with Olfr734 belonging to the G-protein coupled receptor family (GPCR). In 2023, our group predicted and characterized asprosin in silico for the first time and demonstrated the robust expression of fbn1, and furin in the gonads of teleost spotted snakehead (ss) Channa punctata. Taking it forward, in the current study, we have investigated the effect of asprosin on the testicular functions of the spotted snakehead. As C. punctata is a seasonal breeder, reproductive-phase dependent expression of fbn1 in the testis was analysed, which showed significant upregulation during the preparatory and post-spawning phases. In addition, bacterially overexpressed recombinant asprosin of C. punctata was purified to study the effect of ss asprosin on gametogenesis and steroidogenesis. Ex vivo treatment with recombinant asprosin resulted in significant upregulation of spermatogenic marker genes pcna, aldh1a2, cyp26a1, and sycp3. Asprosin also enhanced the gene expression of gonadotropin receptors as well as sex steroid receptors in addition to steroidogenic genes, star and cyp17a1. Further to explore the downstream signalling cascade, the second messenger of GPCRs, cAMP level following asprosin treatment was analysed. Asprosin treatment prominently enhanced the cAMP levels, thereby indicating the involvement of GPCR in transduction of asprosin action. Hence, the study elucidates the regulation of male reproductive function by asprosin in spotted snakehead.
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