骨微架构中的与年龄相关的特征,骨质细胞分布模式,BMSCs在小鼠中的功能和转录基因变化
QianKun Yang1, ZhiYuan Wei1, XiaoYu Wei1
1National & Regional United Engineering Lab of Tissue Engineering, Department of Orthopedics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.
Mechanisms of ageing and development
|October 11, 2023
概括
骨髓中介质干细胞 (BMSC) 和骨质细胞的衰老导致与年龄相关的骨质损失. 在BMSC中抑制PTPN1显著延迟了这种骨退化,揭示了骨衰老的关键目标.
科学领域:
- 骨生物学和衰老研究.
- 骨老化的细胞和分子机制.
背景情况:
- 与年龄相关的骨质损失是骨衰老的标志,但骨髓介质干细胞 (BMSC) 和骨质细胞在这个过程中的确切作用仍然不清楚.
- 了解老化过程中BMSC和骨质细胞的细胞和分子变化对于开发抗骨退化的干预措施至关重要.
研究的目的:
- 研究与年龄相关的骨微观结构变化,骨质细胞分布,以及BMSCs的功能和转录基因变化.
- 确定参与BMSC衰老的关键基因及其在与年龄相关的骨质损失中的作用.
- 评估针对已识别的基因以减轻骨质损失的治疗潜力.
主要方法:
- 在老年小鼠中分析骨微观结构和骨质细胞分布.
- 评估BMSC差异化潜力和转录基因分析 (RNA-Seq).
- 使用RNA-Seq和公共数据集 (GSE35956) 的权重基因共表达网络分析 (WGCNA) 和生物信息学分析.
- 在体内验证使用AAV介导的Ptpn1抑制.
主要成果:
- 观察到与年龄相关的脊椎骨质和皮层骨质量显著下降,骨质细胞分布发生变化.
- 来自老年小鼠的BMSC显示了逆转的骨质生成-基生成差异化潜力,并激活了与衰老相关的途径 (例如p53信号传递).
- PTPN1被确定为BMSC衰老中的关键枢纽基因,其使用AAV-Ptpn1-RNAi的向抑制有效地推迟了与年龄相关的骨损失.
结论:
- 衰老严重影响BMSC功能和骨质细胞的行为,导致骨的微观结构退化.
- PTPN1在BMSC衰老和与年龄相关的骨质损失中发挥着关键作用.
- 准PTPN1代表了一种有前途的治疗策略,用于对抗与年龄相关的骨质损失.
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