ArticleInternational journal of molecular sciences2025
Integrated Role of Arginine Vasotocin in the Control of Spermatogenesis in Zebrafish.
Article in International journal of molecular sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Arginine vasotocin (AVT) has recently emerged as a local regulator of testicular function in fish. Using ex vivo culture system, it was demonstrated that AVT directly stimulates androgen-dependent basal spermatogenesis in zebrafish. In the presence of gonadotropins, AVT enhanced FSH-induced development of early phases of spermatogonial proliferation while blocking FSH-mediated spermiogenesis. However, AVT promoted proliferation of LH-induced pre-meiotic and meiotic germ cell populations without affecting the final stages of spermiogenesis. These findings led to the hypothesis that AVT plays a role by promoting early germ cell proliferation and differentiation while simultaneously inhibiting premature progression through spermiogenesis. To test this hypothesis, we investigated the chronic effects of AVT on adult zebrafish testes, in vivo. Prolonged AVT treatment for 21 days led to dose-dependent accumulation of undifferentiated type A spermatogonia and reduced post-meiotic germ cells and spermatozoa. We also observed decreased plasma 11-ketotestosterone (11-KT) levels and downregulation of
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