衰老诱导的脂质组变化发生在介质细胞干细胞中
Molly E Ogle1,2, Joseph L Corstvet3, Reesha K Vayalakkara1
1Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 313 Ferst Drive, Atlanta, Georgia 30332, United States.
Journal of proteome research
|November 17, 2025
概括
介酶体 stromal 细胞 (MSCs) 在培养中老化时,会积累特定的脂质变化,特别是甘油三. 这些脂质变化可以帮助监测和潜在地减轻MSC扩张期间的衰老临床使用.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 代谢学 代谢学 代谢学
背景情况:
- 介酶体 stromal 细胞 (MSCs) 对临床应用具有前景.
- 细胞衰老限制了MSC的治疗潜力和扩张.
- 了解MSC培养动态对于有效的细胞治疗至关重要.
研究的目的:
- 为了研究在培养扩张过程中MSC脂质代谢的变化.
- 在培养的MSC中与衰老标志物相关联脂质特征.
- 为早期衰老检测识别潜在的脂质生物标志物.
主要方法:
- 培养了来自两个捐赠者的人类MSC,持续了12天.
- 使用与衰老相关的β-galactosidase (SA-β-gal) 活性评估衰老.
- 使用超高性能液态染色体质谱法 (UHPLC-MS/MS) 分析脂质特征.
- 通过光谱数据库匹配确定了237种独特的脂质物种.
主要成果:
- 在连续培养过程中,大多数类型的脂质丰富性通常会增加.
- 在脂质资料中观察到显著的捐赠者与捐赠者的异质性.
- 十二种脂质,包括四种甘油三 (TGs),有着明显的衰老水平 (<10%,10-20%,>20%SA-β-gal+).
- 含有长链不和脂肪酸的TG与MSC衰老的增加有很强的相关性.
结论:
- 在培养扩张过程中,MSC脂质代谢发生显著变化.
- 特定的脂质特征,特别是某些甘油三,可以表明衰老.
- 脂质分析为监测MSC培养品质和衰老提供了一种潜在的方法.
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