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骨骺生长板PTHrp-Ihh信号轴及相关因子调节机制研究进展 被引量:7

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摘要 甲状旁腺素相关肽(PTHrp)-印第安刺猬蛋白(Ihh)信号轴是骨骺生长板中调节软骨和成骨细胞增殖、分化、肥大和矿化的重要负反馈轴。围绕该信号轴有多种生长因子如Sox9、BMP、TGF-β等,参与调控软骨及成骨细胞生长。新近研究表明,PTHrp通过Sox9阻止软骨前体细胞向肥大软骨细胞转化,通过抑制BMP-6阻止软骨细胞成熟,通过抑制BMP-4阻止软骨细胞凋亡;通过下调Ihh、BMP-6表达,TGF-β抑制软骨细胞分化;通过激活FGFR-3,可下调PTHrp、Ihh表达,抑制软骨细胞增殖;Ihh除具有促进软骨细胞增殖的作用外,还促进软骨膜上成骨细胞的分化,从而加速成骨。彻底弄清骨骺生长板中PTHrp-Ihh信号轴及相关因子的调节机制,对于治疗一些遗传性疾病、修复软骨及骨缺损有着重要的临床意义。该文围绕PTHrp-Ihh信号轴及相关因子对软骨细胞调控机制研究进展作一综述。
出处 《国际骨科学杂志》 2007年第6期348-350,361,共4页 International Journal of Orthopaedics
基金 国家自然科学基金(30571872)
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