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头骨神经中的TGF-β信号影响下骨的晚期吸收和长度

Claire J Houchen¹, Saif Ghanem², Vesa Kaartinen²

¹Department of Oral and Craniofacial Sciences, University of Missouri-Kansas City School of Dentistry, Kansas City, MO, USA.

bioRxiv : the preprint server for biology

|June 3, 2024

概括

转化生长因子β (TGF-β) 在神经中的信号传递中介质通过调节骨质细胞活动来控制骨的长度. 这一发现为形面部缺陷提供了新的治疗点.

科学领域:

面发育和骨生物学.

背景情况:

缺陷,常见的面形,可以导致严重的健康和生活质量问题.
目前对严重的骨缺陷的治疗方法通常涉及侵入性手术.
了解大骨长度决定的细胞机制对于开发改进的疗法至关重要.

研究的目的:

研究神经介质 (NCM) 中转化生长因子β (TGF-β) 信号在调节骨质细胞活动和下发育中的作用.
确定NCM中的TGF-β信号是否影响骨重塑和胚胎骨长度的后期阶段.

主要方法:

对小鼠胚胎的分析,对TGF-β型I受体 (Tgfbr1) 进行了向删除,特别是在NCM中.
微型计算机断层扫描 (micro-CT) 和马森三色染色以评估骨结构和质量.
对关键骨重塑标记物的基因表达分析 (Col1α1,Mmp13,Rank,Mmp9).
耐酸酸酶 (TRAP) 染色以评估骨质细胞局部化和活性.
在关键发育窗口期间药理上抑制Tgfbr1信号传递.

主要成果:

患有NCM特异性Tgfbr1缺陷的小鼠表现出明显较短的下.
没有观察到骨质整体 (例如骨面积,状参数,Col1α1,Mmp13表达) 的显著差异.
在Tgfbr1-缺乏下中,骨质细胞数量和周长的三倍减少.
骨质细胞标记物的基因表达 (Rank,Mmp9) 也减少了三倍.
药理抑制Tgfbr1信号缩短了胚胎下长度.

结论:

在NCM中TGF-β信号传递对于调节中皮质衍生骨质细胞的数量和活性至关重要.
这种信号通路显著影响晚期胚胎下骨的长度.
在NCM中由TGF-β介导的骨质细胞与骨质细胞通信的精确机制尚未完全阐明,这表明了一条新的途径.

关键词:

转化生长因子-β型I型受体转化生长因子-β型受体骨头改造骨头改造骨头改造骨质再吸收骨质再吸收牙牙牙的意思下巴下巴是一个大面部发育面面部发育神经峰的神经峰骨质细胞的骨质细胞.

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