来自骨髓阿迪波克系细胞的IGF-1在成熟的雌性小鼠中刺激内皮层骨的形成
Joshua C Bertels1, Jasmin Koehnken Sawall1, Brian Dulmovits2
1Department of Surgery, Translational Research Program in Pediatric Orthopedics, The Children's Hospital of Philadelphia, Philadelphia, PA, 19104, United States.
JBMR plus
|March 9, 2026
概括
亚迪波涅素阳性树皮细胞是骨髓中胰岛素样生长因子1 (IGF-1) 的关键来源. 从这些细胞中删除IGF-1减少了雌性小鼠的骨形成和质量.
科学领域:
- 骨生物学 骨生物学
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
背景情况:
- 胰岛素样生长因子1 (IGF-1) 对于组织生长和功能至关重要.
- IGF-1通过内分泌和副分泌信号调节骨生长和骨髓 (BM) 血液形成.
- 在骨中局部产生IGF-1的特定细胞来源和机制尚不清楚.
研究的目的:
- 在骨髓微环境中识别IGF-1的局部来源.
- 研究Adipoq阳性 stromal细胞在IGF-1生产中的作用及其对骨代谢的影响.
主要方法:
- 使用一种小鼠模型,在Adipoq阳性细胞 (Adipoq-Cre) 中向删除IGF-1.
- 分析了突变和对照小鼠的骨质形成,皮层骨质量,椎骨参数和血液生成性质.
- 采用克雷洛克斯基因策略进行细胞特异性基因删除.
主要成果:
- 在产后小鼠BM中,Adipoq阳性 stromal 细胞被确定为IGF-1的重要来源.
- 在Adipoq阳性细胞中删除IGF-1导致成熟雌性小鼠内皮层骨形成减少和皮层骨质量减少.
- 在两种性别中都没有观察到对椎骨参数或造血性质的显著影响.
结论:
- 阿迪波克阳性 stromal 细胞在骨髓中代表了 IGF-1 的关键局部来源.
- 这些细胞的骨髓衍生IGF-1在调节骨代谢,特别是皮层骨方面发挥了特定的作用.
- 这一发现突出了BM领域内局部骨调节的新机制.
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