通过Rdh10介导的视网膜酸信号调节神经细胞微环境在ENS形成过程中
Naomi E Butler Tjaden1,2,3, Stephen R Shannon1,2, Christopher W Seidel1
1Stowers Institute for Medical Research, Kansas City, Missouri 64110, USA.
bioRxiv : the preprint server for biology
|February 3, 2025
概括
视网醇脱酶10 (Rdh10) 缺乏通过破坏神经细胞迁移来损害肠道神经系统的形成,导致赫施普朗格病模型. 这突出了Rdh10的亮点.
科学领域:
- 发展生物学 发展生物学
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
背景情况:
- 肠道神经系统 (ENS) 调节胃肠道功能,并从阴道神经细胞 (NCC) 发展.
- 在NCC发育的缺陷导致胃肠道疾病,如赫施普隆病 (HSCR),与许多遗传原因仍然未知.
- 维生素A代谢受Rdh10调节,对胚胎发生至关重要,但其在ENS发育中的作用尚不清楚.
研究的目的:
- 调查Rdh10在肠道神经系统 (ENS) 发育中的作用及其与肠道角质结核病的潜在联系.
- 确定Rdh10缺乏影响神经细胞 (NCC) 迁移和ENS形成的分子机制.
- 探索了解Rdh10在ENS发育和相关疾病中的作用的治疗潜力.
主要方法:
- 利用Rdh10功能丧失的小鼠模型研究ENS发育.
- 在Rdh10突变胚胎中分析了NCC迁移和分化.
- 进行了比较RNA测序,以识别改变的基因表达网络.
- 在Rdh10突变体中检查了细胞外矩阵组成的变化.
主要成果:
- 在小鼠胚胎中,Rdh10 缺乏导致肠道腺结核病,这是HSCR的标志.
- 瓦格尔NCC形成并迁移,但未能入侵Rdh10突变的前肠.
- 在E7.5-E9.5.5之间,Rdh10对于NCC侵入肠道至关重要.
- RNA测序揭示了Rdh10突变体中Ret-Gdnf-Gfrα1信号通路的下调.
- 观察到细胞外基质的改变,包括原的增加,限制了NCC的进入.
结论:
- 通过Rdh10介导的维生素A代谢和视网膜酸信号传递对于ENS形成至关重要.
- Rdh10调节NCC微环境,影响它们侵入发育中的肠道.
- 干扰Rdh10功能通过损害NCC迁移,有助于肠道角质结核病的发病.
- 这项研究确定Rdh10是ENS发育的关键调节者,也是HSCR病因学的潜在因素.
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