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符合条件的基底减轻了与衰老相关的压力诱导的介质细胞 stromal 细胞的表型
Robert C H Gresham1, Andrea C Filler1, Shierly W Fok1
1Department of Orthopaedic Surgery, School of Medicine, UC Davis Health, Sacramento, California, USA.
Journal of biomedical materials research. Part A
|December 14, 2023
概括
基质刚度会影响衰老的介质干细胞 (MSCs). 合规基质可降低老化MSC中的老化相关分泌表型 (SASP),从而有可能改善老年人细胞疗法.
科学领域:
- 生物医学工程 生物医学工程
- 细胞生物学 细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 介质细胞 stromal 细胞 (MSCs) 对于肌肉骨疗法至关重要,因为它们的分化和分泌.
- 年轻的MSC是机械敏感的,但老的MSC显示分化减少和老化增加.
- 机械环境对老化的MSC的影响还不太清楚.
研究的目的:
- 为了研究基质刚度如何影响衰老的MSC表型.
- 评估机械线索对衰老标记物和炎症性细胞因子分泌物的影响.
- 探索调节衰老的MSC的潜力,以改善自身细胞疗法.
主要方法:
- 在不同硬度的聚烯胺水凝上培养辐射诱导的过早衰老的MSC.
- 评估衰老标志物,细胞形态和炎症性细胞因子分泌.
- 评估条件介质对纯和混合 (健康/衰老) MSC 种群骨质细胞矿化的影响.
主要成果:
- 与组织培养塑料 (TCP) 相比,50kPa凝上的老化MSC显示了老化相关的分泌表型 (SASP) 标记的减少.
- 常见的衰老标志物 (p21,CDKN2A,CDKN1A) 仍然不受基质刚性的影响.
- 在符合标准的基板上的老化MSCs的条件介质增强了骨质细胞矿化.
- 与单独健康的MSC相比,健康和衰老的MSC混合种群表现出减弱的衰老表型和类似的骨质细胞矿化.
结论:
- 符合标准的基板可以降低MSCs的衰老表型.
- 这种机械调制可能提供一种策略,以提高老年患者自身MSC疗法的疗效.
- 这些发现表明,机械环境在调节衰老细胞行为的过程中起着至关重要的作用.
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