节牙带干细胞的复制衰老中的代谢功能障碍受AMPK信号通路调节
Meilin Hu1, Ruiqi Liu1, Xiaoyu Chen1
1Tianjin Key Laboratory of Oral Soft and Hard Tissues Restoration and Regeneration, Tianjin Medical University School of Stomatology, Tianjin Medical University, Heping, China.
Stem cells and development
|September 20, 2024
概括
牙周带介质干细胞 (PDLSCs) 经历长期扩张的衰老. 代谢变化,特别是AMP激活蛋白激酶 (AMPK) 信号传递,是这一过程的关键调节者,影响再生潜力.
科学领域:
- 牙科 牙科是指牙科的专业.
- 干细胞生物学 干细胞生物学
- 代谢学 代谢学 代谢学
- 细胞衰老 细胞衰老
背景情况:
- 牙周带介质干细胞 (PDLSCs) 对牙科再生医学至关重要.
- 长时间的体外扩张导致PDLSC衰老,限制了它们的治疗用途.
- 了解PDLSC衰老调节对于优化基于细胞的疗法至关重要.
研究的目的:
- 调查代谢变化的作用在PDLSCs的复制性衰老中的作用.
- 为了确定关键的代谢途径和参与PDLSC衰老的调节者.
- 探索针对代谢途径的潜在干预措施,以减轻PDLSC衰老.
主要方法:
- 将PDLSC培养到不同的通道数 (P4,P10,P20) 以诱导衰老.
- 评估PDLSCs老化的表型.
- 进行全面的代谢学分析,以分析代谢变化.
- 研究AMP激活蛋白激酶 (AMPK) 信号通路及其组成部分.
- 用AMPK激活剂 (AICAR) 治疗衰老的PDLSCs.
主要成果:
- PDLSCs表现出一个衰老的表型,随着通道数量的增加.
- 代谢学揭示了在PDLSC复制性衰老过程中显著的代谢变异.
- AMP:ATP比率增加,而p-AMPK,FOXO1和FOXO3a水平在衰老的PDLSC中下降.
- 在PDLSCs中,AICAR治疗部分恢复了AMPK酸化.
- 衰老的PDLSCs因AMPK酸化受损而对能量代谢变化的反应受损.
结论:
- 代谢重编程是PDLSC复制性衰老的组成部分.
- 在衰老的PDLSC中,AMPK信号通路失调,影响它们对代谢压力的反应.
- 损坏的AMPK酸化有助于衰老的PDLSCs无法适应能量波动.
- 针对代谢途径,特别是AMPK,可以提供提高PDLSCs可再生应用的活力和功能的策略.
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