一个轴向的霍克斯代码控制了Nematostella vectensis中的组织细分和身体模式
Shuonan He1, Florencia Del Viso1, Cheng-Yi Chen1
1Stowers Institute for Medical Research, Kansas City, MO 64110, USA.
概括
海中的霍克斯基因控制身体细分和触角的发育. 这表明古老的轴性霍克斯代码早于动物前后轴的演化.
科学领域:
- 发育生物学
- 进化生物学
- 遗传学
背景情况:
- 霍克斯基因对双边动物的前后轴 (AP) 模式至关重要.
- 霍克斯代码的进化起源尚不清楚,特别是在缺乏明确的AP轴的基底动物中.
研究的目的:
- 研究霍克斯基因在Cnidaria的发展中的作用,特别是海藻Nematostella vectensis.
- 了解霍克斯基因网络如何在没有明确的AP轴的情况下对身体模式和细分作出贡献.
主要方法:
- 使用短发针RNA (shRNA) 介导的淘汰来减少基因表达.
- 使用CRISPR-Cas9基因编辑来产生特定基因的突变.
- 分析了基因操纵对幼虫内皮细分和纹模式的影响.
主要成果:
- 证明了一个Hox-Gbx基因网络调节了幼虫内皮的辐射细分.
- 显示Hox-Gbx活动的丧失导致触角沿着指导轴的缺陷.
- 确定了Hox基因在组织细分中的作用,独立于定义的AP轴.
结论:
- 提出一个轴性霍克斯代码参与了双边AP轴的演变之前的身体模式和组织细分.
- 表明霍克斯基因在细分中的基本机制可能是古老的和保存的.
- 提供关于发育基因网络早期演变的见解.
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