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帕拉霍克斯基因重新审视:从肠道模式到状动物的集成轴和神经组织

Andreas C Fröbius¹, David B Mark Welch², Holger Herlyn³

¹Institute for Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, Justus Liebig University Giessen, Giessen, Germany.

Journal of experimental zoology. Part B, Molecular and developmental evolution

|March 16, 2026

概括

在鸟中发现了ParaHox基因Gsx和Cdx,但Xlox缺席,表明基因组减少. 它们的表达与神经发育有关,这表明在这种血统中存在一种衍生条件.

科学领域:

发育生物学是发展生物学.
进化遗传学的进化遗传学
进行比较的基因组学.

背景情况:

帕拉霍克斯基因 (Gsx,Xlox,Cdx) 在进化上与霍克斯基因相关,并参与甲动物体轴,肠道和神经发育.
帕拉霍克斯基因补充和组织在动物血统之间有很大差异.
以前的研究表明,在cnidarian-bilaterian分裂之前,ParaHox基因已经存在.

研究的目的:

调查Gnathifera中的ParaHox基因部署,特别是专注于罗提弗.
在 rotifer Brachionus manjavacas 中分析 Gsx 和 Cdx 的基因组组织和胚胎表达.
确定Gnathifera中ParaHox基因补充是否减少.

主要方法:

进行比较的基因组学,以识别Gnathifera中的ParaHox基因组学 (Gsx,Cdx,Xlox).
基因组测绘以分析Brachionus manjavacas中的ParaHox基因组织.
整体安装现场杂交研究Bm-Gsx和Bm-Cdx的胚胎表达模式.

主要成果:

在Gnathifera中发现了Gsx和Cdx的正义基因,但没有Xlox,这表明ParaHox基因补充减少.
布拉奇翁 (Brachionus manjavacas) 呈现出分散的ParaHox配置,其中Bm-Gsx和Bm-Cdx分别为4.4 Mb.
在足部神经元和参与胃口系统发育的细胞中检测到Bm-Gsx表达. 在与膀相关的FMRFamide阳性细胞中发现了Bm-Cdx.

结论:

鸟中的ParaHox基因表达主要与神经结构有关.
这种神经关联的表达模式很可能是罗提弗的衍生状况,反映了它们紧的体型和缩小的肠道.
帕拉霍克斯基因的部署表明,进化灵活性受到血统特定的发展约束的影响.

关键词:

这就是阿坎托塞法拉.布拉基奥尼乌斯 (Brachionus) 是一个手臂运动员.Cdx 在线阅读 Gsx 在线观看在线观看帕拉霍克斯 (ParaHox) 是一种更多关于 gnathifera 的新闻

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