功能上不同的黑色皮质素受体亚型和海的HPI轴
Ciaran A Shaughnessy1, Valorie D Myhre2, Stephen D McCormick3
1C Shaughnessy, Department of Integrative Biology, Oklahoma State University, Stillwater, United States.
Journal of molecular endocrinology
|April 15, 2025
概括
海拥有具有独特特征的功能性下丘脑-垂体-内脏 (HPI) 轴. 它的黑色皮质蛋白受体与的脊椎动物相比显示出不同的激活模式,提供了进化见解.
科学领域:
- 进行比较的内分泌学.
- 进化生物学是进化的生物学.
- 神经内分泌学神经内分泌学
背景情况:
- 垂体-垂体-内 (HPI) 轴在脊椎动物中至关重要,但其在无脊椎动物中的功能尚未完全理解.
- 兰普雷表现出独特的黑色素cortin前激素 (proopiocortin和promelanotropin),与有的脊椎动物不同.
研究的目的:
- 为了研究海 (Petromyzon marinus) 的HPI轴.
- 描述关键的HPI组件及其进化意义.
主要方法:
- 黑色皮质素受体的遗传学分析 (Mcar,Mcbr).
- 对HPI轴组件 (例如mcar,star) 的基因表达分析.
- 关于兰普雷的受体激活的功能研究.
主要成果:
- 兰普雷的Mcar和Mcbr受体在进化上是基底的,以至于gnathostome受体.
- HPI轴基因在头中共同表达,这表明皮质类固醇产生的作用.
- 兰普雷Act,Msh-a和Msh-b激活Mcar和Mcbr,Mcar对Msh的敏感性更高.
- 受体的激活是Mrap-独立的,不像在gnathostomes.
结论:
- 鱼中存在一个功能性HPI轴,它表现出与脊椎动物不同的特征.
- 麦克2r的Acth和Mrap1依赖性的选择性可能是在agnathans和gnathostomes分离后演变的.
- 这项研究提供了关于脊椎动物HPI轴的进化历史的见解.
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