银行的基因组学将牙的确定的和不确定的生长联系在一起
Zachary T Calamari1,2,3,4, Andrew Song5,6, Emily Cohen5,7
1Baruch College, City University of New York, One Bernard Baruch Way, New York, NY, 10010, USA. zachary.calamari@baruch.cuny.edu.
BMC genomics
|October 30, 2024
概括
研究人员研究了鸟的牙基因进化,发现了Dspp和Aqp1等基因,这些基因可能解释了哺乳动物不断生长的牙和牙根的发展.
科学领域:
- 进化生物学是进化的生物学.
- 基因组学就是基因组学.
- 发育生物学是发展生物学.
背景情况:
- 连续的牙生长是哺乳动物进化的一个关键特征,但干细胞对其遗传调节的理解甚微.
- 鼠标模型对于研究根形成信号是有限的,因为牙模式的遗传路径重叠.
- 银行和草原提供独特的模型,拥有根植和未根植的牙,牙的大小和形状都保留了.
研究的目的:
- 使用模型调查牙根形成和连续牙生长的遗传基础.
- 为了识别在Glires类别中与根发育相关的受选择的基因.
主要方法:
- 组装了一个银行 (Myodes glareolus) 的 de novo基因组.
- 在Glires (动物和形动物) 中进行了比较基因组和转录组分析.
- 在银行和小鼠之间比较胚胎摩拉发育基因表达.
主要成果:
- 识别了15个牙基因与改变的合成和六个基因在Glires的积极选择.
- 发现了两个基因,Dspp和Aqp1,在没有根植的牙的物种中进行了积极选择.
- 观察到 Dspp 和 Aqp1 的表达在草原 (未根植的牙) 与银行 (根植的牙) 相比下降.
结论:
- 牙基因进化正在Glires中进行,特定的基因与根形成有关.
- Dspp和Aqp1是哺乳动物牙根发育机制研究的候选基因.
- 银行是一种有价值的模型,用于理解不断增长的牙的融合进化.
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