神经激素功能的演变是由皮体中kisspeptin类型的作用揭示的
Tabinda Islam1,2, Luis A Yañez-Guerra1,3,4, Dean C Semmens1,5
1Centre for Evolutionary & Functional Genomics, School of Biological & Behavioural Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, UK.
BMC biology
|February 19, 2026
概括
海星拥有两个kisspeptin前体蛋白质,产生四个神经,在繁殖之外有不同的作用. 这些发现揭示了kisspeptin信号传递是古老的和类的,在无脊椎动物中具有独特的进化路径.
科学领域:
- * 进化发展生物学 进化发展生物学
- *比较性内分泌学
- * 无脊椎动物的神经生物学
背景情况:
- *神经激素基斯佩普丁 (Kisspeptin) 通过激素释放激素刺激对哺乳动物的生殖调节至关重要.
- *无脊椎动物中kisspeptin类型神经的功能和进化史在很大程度上仍未被探索.
- * 这项研究研究了海星Asterias rubens中的kisspeptin信号传递,Asterias rubens是deuterostome无脊椎动物族的代表.
研究的目的:
- * 为了识别和描述海星Asterias rubens中的kisspeptin前体蛋白和神经.
- * 确定这些神经的表达模式和生理功能.
- * 阐明基斯佩普丁信号通路的进化起源和多样化.
主要方法:
- * 在A. rubens. 中鉴定了吻素前体蛋白 (ArKPP1,ArKPP2) 和衍生的神经 (ArKP1.1,ArKP1.2,ArKP2.1,ArKP2.2).
- *使用mRNA in situ杂交和免疫组织化学分析神经的表达.
- * 淋巴腺和胃组织的体外测试,以及体内注射以评估生理效应.
主要成果:
- * A. rubens 拥有两种kisspeptin前体蛋白,产生四种不同的kisspeptin类型神经,组织分布各异.
- * KP1型神经具有肌体抑制作用,而 KP2型神经对海星生殖和消化器官具有肌体刺激作用.
- *这些神经的体内给药诱导了胃逆转,ArKP1.2影响了直行为.
结论:
- *基斯佩普丁类型的神经是一种古老的,类调节剂,涉及到生殖之外的各种生理过程.
- *ArKP2.2的激发功能与脊椎动物的kisspeptin作用一致,与与脊椎动物的kisspeptin受体相关的受体 (ArKPR3) 结合.
- *受ArKP1.1和ArKP1.2介导的抑制性kisspeptin信号传递可能代表了Ambulacraria的独特进化或在带动物中丢失的古老起源.
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