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转基因小鼠中的加速骨损失表达构成性活跃的TGF-β受体I型受体

Parichart Toejing¹, Nithidol Sakunrangsit¹, Pinyada Pho-On¹

¹Center of Excellence in Skeletal Disorders and Enzyme Reaction Mechanism, Department of Physiology, Faculty of Dentistry, Chulalongkorn University, Bangkok 10330, Thailand.

International journal of molecular sciences

|July 14, 2023

概括

在小鼠中具有构成性活性的TGF-β受体I型会导致骨质疏松症. 这种情况的特点是骨体积减少,骨质细胞增加和骨质细胞减少,可能是通过抑制"刺"信号来抑制.

科学领域:

骨生物学骨生物学
骨的新陈代谢骨的新陈代谢
细胞信号传递细胞信号传递

背景情况:

转化生长因子β (TGF-β) 对于骨微环境中的细胞通信至关重要.
调节不当的TGF-β信号传递可能会影响骨平衡,并导致骨疾病.

研究的目的:

在小鼠模型中研究构成性活性TGF-β受体I型 (TβRI) 的骨后果.
阐明TGF-β诱导的骨损失背后的细胞和分子机制.

主要方法:

产生了具有可诱导和活性TβRI表达的转基因小鼠 (Mx1;TβRI).
利用微型计算机断层扫描 (μCT) 和组织形态测量进行骨结构分析.
在骨细胞和组织上进行基因表达 (qPCR) 和蛋白质分析 (Western blot).

主要成果:

Mx1;TβRI小鼠在股骨和下骨中表现出皮质厚度降低和无骨体积减少.
观察到骨质细胞数量和分化增加,加上骨质细胞数量和功能减少.
关键的基因表达变化表明骨质细胞生成,骨质母细胞生成发生变化,并抑制了 Hedgehog 信号通路.

结论:

构成性TβRI激活导致小鼠骨质疏松症,因为它破坏了骨再吸收和骨形成之间的平衡.
这项研究表明,TGF-β信号可能会抑制刺的通路,从而导致骨质损失.
这些发现突出了TGF-β作为由骨质疏松症特征的骨疾病的潜在治疗点.

关键词:

在TGF-β的基础上.骨头骨头骨头骨头硬度硬度硬度硬度骨质母细胞的骨质母细胞.骨质结晶体的骨质细胞.

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