在普通话鱼中性尺寸二态的特征和与igfbp-5a/b规则的关联
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Xiaoli Yao1,2,3, Yunhong Zhou1,2,3, Kenneth Nyirenda1,2,3
1Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai, 201306, China.
Fish physiology and biochemistry
|August 3, 2024
概括
女普通鱼的生长速度比雄性更快,原因是雌激素水平更高,从而促进生长激素和IGF-1. 这项研究阐明了这一重要的水产养殖物种性尺寸变异背后的机制.
科学领域:
- 水产养殖是水产养殖的一种方式.
- 鱼类生物学 鱼类生物学
- 内分泌学 在内分泌学.
背景情况:
- 鱼 (Siniperca chuatsi) 是一个重要的东亚水产养殖物种.
- 观察到性尺寸变态 (SSD),女性的生长速度更快,但潜在的机制尚不清楚.
- 了解SSD对于优化水产养殖生产和养殖管理至关重要.
研究的目的:
- 研究鱼性尺寸变异 (SSD) 的调节机制.
- 分析SSD与生长激素 (gh),胰岛素样生长因子1 (igf1) 和胰岛素样生长因子结合蛋白5 (igfbp-5) 的表达之间的关联.
- 描述生长差异的性腺发育和荷尔蒙特征.
主要方法:
- 使用后勤增长方程建模了生长参数 (体重和总长度).
- 测量了雌激醇 (E2) 和 (T) 的血清水平.
- 在大脑,肝脏和生殖腺中确定gh,igf1和igfbp-5a/b的相对mRNA表达水平.
- 为两性建立了阴道发育地图.
主要成果:
- 从3个月起,雌性普通鱼的体重和总长度明显高于雄性.
- 与男性相比,女性的血清E2,大脑gh和肝脏igf1表达显著更高.
- 男性的血清T水平明显高,在3.0-4.0个月后,igfbp-5a/b表达明显高于女性.
- 阴道发育与增加的igfbp-5a/b表达相关,特别是在男性中.
结论:
- 与雄性相比,雌性普通鱼的生长速度较快,主要是由于E2水平较高.
- 女性的E2升高可能会增加igf1水平,可能通过抑制igfbp-5a/b表达,从而促进更快的生长.
- 这些发现提供了关于普通鱼中SSD的激素和分子基础的见解,这与水产养殖应用有关.
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