在BMSC中,TRIM21通过将骨质基平衡转移到脂肪生成方面,为老年性骨质疏松症作出贡献
Changwei Li1, Leilei Chang2, Li Zhou3,4
1Department of Orthopedics, Shanghai Key Laboratory for Prevention and Treatment of Bone and Joint Diseases, Shanghai Institute of Traumatology and Orthopedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China. lcw11876@rjh.com.cn.
老化骨髓 stromal 细胞 (BMSCs) 增加 TRIM21,促进脂肪细胞在骨细胞上的分化. 这种转变有助于骨质疏松症并阻碍骨的修复,这表明TRIM21是治疗点.
科学领域:
- 生物遗传学 生物遗传学
- 细胞生物学 细胞生物学
- 整形外科 整形外科 整形外科
背景情况:
- 老化的骨髓 stromal 细胞 (BMSCs) 呈现出一个转向脂肪生成的转变,而不是骨质生成.
- 这种不平衡有助于与年龄相关的骨质疏松症和骨再生障碍.
- 推动这种转变的精确分子机制在很大程度上是未知的.
研究的目的:
- 研究TRIM21在BMSC差异化与年龄相关的转变中的作用.
- 阐明将BMSC衰老与改变的骨质基平衡联系起来的分子途径.
主要方法:
- 在老年BMSC中对TRIM21表达的定量分析.
- 研究IL-1β-JNK MAPK通路的激活.
- 通过K48无化进行β-catenin降解的评估.
主要成果:
- 在老年BMSC中,TRIM21的表达上调,与增加的脂肪生成相关.
- 激活IL-1β-JNK MAPK通路会诱导TRIM21的表达.
- TRIM21促进β-catenin的降解,促进脂肪生成和抑制骨质生成.
结论:
- 增加TRIM21表达是驱动与年龄相关的BMSC脂肪转移的内在机制.
- 准TRIM21可能为与年龄相关的骨质疏松症和骨再生提供治疗策略.
- IL-1β-JNK MAPK-TRIM21-β-catenin轴在与年龄相关的骨质损失中至关重要.
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