骨生长通过SOX8和SOX9在促进储备性冠状细胞致力于柱状增殖的共同作用而得到增强
Arnaud N Molin1, Romain Contentin1, Marco Angelozzi1
1Department of Surgery, Division of Orthopaedic Surgery, The Children's Hospital of Philadelphia, Philadelphia, PA 19104.
概括
这项研究显示,与SOX9相关的基因SOX8在骨生长中起着至关重要的作用. 在小鼠中,SOX8功能的丧失导致长骨显著缩短,这突显了它在软骨细胞发育和软骨再生疗法中的重要性.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- SOX8是一种与人类身高遗传性相关的基因,但其在负责骨生长的细胞 - - 软骨细胞中的功能基本上是未知的.
- SOX9 是一种成熟的体生成主调节器,使得SOX8 作为一个密切的亲属的作用成为一个关键的研究领域.
研究的目的:
- 阐明SOX8在软骨细胞中的功能及其对骨发育的贡献.
- 为了比较SOX8与SOX9.9的体潜力.
主要方法:
- 在小鼠生长板冠状细胞中分析SOX8和SOX9表达模式,使用in situ杂交.
- 产生和表型分析SOX8无活化小鼠,包括肢体骨细胞中SOX9无活化复合突变物.
- 在体细胞中对SOX8和SOX9的过度表达研究,以评估它们对增殖和分化的功能影响.
主要成果:
- SOX8表达在生长板冠状细胞中,具有明显的重叠模式,并在SOX9的峰值表达之前表达.
- 缺少SOX8功能的小鼠由于储备性红细胞的进展受损,显著缩短了长骨 (15-20%的减少).
- 即使在没有SOX9的情况下,SOX8也会促进胆细胞的增殖和分化,并且似乎比SOX9.9更有效.
结论:
- SOX8与SOX9一起,通过调节生长板冠状细胞的承诺和增殖,对骨生长至关重要.
- 与SOX9相比,SOX8表现出更高的体活性,这表明它作为治疗软骨修复和再生的治疗剂的潜力.
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