激活先天免疫通路以调节与突和软骨之间的介质层细胞 (MSC) 相互作用
Peter Linde1, Lyndah Chow1, Isabella Sabino1
1Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, United States.
Frontiers in bioengineering and biotechnology
|August 27, 2025
概括
通过托尔类受体 (TLR) 或STING通路激活介质层细胞 (MSC),改变它们与关节细胞的相互作用. 这种预激活会影响巨细胞,突细胞和软骨细胞的细胞分泌和基因表达,这表明细胞对MSC治疗关节炎的特异反应.
科学领域:
- 免疫学和再生医学
- 细胞生物学与分子机制
背景情况:
- 在骨关节炎 (OA) 治疗中,介质层细胞 (MSC) 的临床疗效有所变化.
- 之前的研究表明,通过Toll-like受体 (TLR) 和cGAS-STING途径对MSCs的免疫许可可以改善OA动物模型的结果.
- 了解激活的MSC与关节细胞之间的相互作用对于阐明治疗机制至关重要.
研究的目的:
- 通过TLR和STING途径激活MSC对它们与马类巨细胞,突细胞和冠状细胞的相互作用的影响.
- 阐明预激活的MSC增强骨关节炎治疗潜力的潜在机制.
主要方法:
- 用TLR3或STING激动剂刺激马的骨髓衍生MSC.
- 从激活的MSC中采集条件介质 (CM),并应用于IL-1β/ TNF-α刺激的马类巨细胞,状细胞和冠状细胞.
- 使用多重免疫测试和ELISA分析细胞因子分泌;通过大量RNA测序评估差异性基因表达.
主要成果:
- 通过TLR激活的MSCCM显著降低了协同细胞和冠状细胞的促炎细胞因子分泌 (IL- 1β,IL- 6,IL- 18).
- 在巨细胞中,STING激活的MSCCM调节了细胞因子 (增加了G-CSF,IL-4,减少了IL-5) 和降低了IL-8.
- 在用TLR-MSC-CM或STING-MSC-CM治疗后,转录组分析显示每个关节细胞类型的不同基因表达模式.
结论:
- 关节细胞对由TLR或STING激活的MSC分泌的因子表现出不同的反应,每个细胞类型都观察到不同的途径变化.
- 对"许可"MSC的细胞反应的体外建模为MSC与细胞相互作用提供了洞察力.
- 需要进行进一步的体内评估,以确定激活的MSC在关节炎治疗中的功能影响.
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