Sex steroid level and sexual dimorphism expression of genes in gonads of the great sturgeonHuso husoLinneaus, 1758 during maturity developmental stages

生物 鲟鱼 性二态性 性别分化 CYP17A1型 性腺发育 性别歧视 性腺 性成熟 内分泌学 内科学 硫氧化物9 睾酮(贴片) 动物 基因 遗传学 基因表达 渔业 医学
作者
Mahtab Yarmohammadi,M. Pourkazemi,Rezvanollah Kazemi,Mohammad Ali Yazdani Sadati,Ali Hallajian,Mohammad Hassanzadeh Saber
出处
期刊:Aquaculture Research [Wiley]
卷期号:48 (4): 1413-1429 被引量:11
标识
DOI:10.1111/are.12977
摘要

Little is known about molecular mechanisms involved in gonad differentiation in sturgeon species. In non-mammalian vertebrates, sox9, dmrt1, cyp17a1 and ar are male specific genes in testicular differentiation and are highly conserved. In order to understand the mechanism underlying testicular development in sturgeon, we investigated sex steroids level of 11-ketotestosterone (KT) and testosterone (T) and relative expression of sox9, dmrt1, cyp17a1 and ar in great sturgeon gonads during different stages of sexual maturity. The results showed all studied genes had dimorphic patterns in males. In immature gonads (stage I), only cyp17a1 expressed in male gonads, while other genes did not express, and KT and T levels were low. Dmrt1 showed dimorphic expression pattern in male gonads at maturity stage II, III and IV. Furthermore, sox9 and ar mRNA presented significant dimorphic expression pattern in male gonads only at maturity stage 4. Plasma androgens levels were significantly higher in males compared to females during maturity stages II, III and IV. The results showed that among these four genes, only cyp17a1 expressed in male gonads at maturity stage I (immature), suggesting that this gene may be applicable as a sex marker in recently differentiated male great sturgeon. Sexually dimorphic patterns in other studied genes (sox9, dmrt1 and ar) suggesting that these genes may be important for testicular development and differentiation in premature great sturgeon. The obtained results provide a foundation for further research on sex differentiation and developing strategies for the sexing of sturgeon for aquaculture.

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