血管内皮生长因子分泌和免疫抑制是人类骨髓中细胞的独特的功效机制
Tyler U Faircloth1, Sara Temple1, Rhett N Parr1
1Department of Biomedical Sciences, Mercer University School of Medicine, Savannah, GA 31324, United States.
Stem cells (Dayton, Ohio)
|June 3, 2024
概括
介酶体 stromal 细胞 (MSCs) 显示出炎症性肠病治疗的潜力. 宿主因子,如微血管中的内皮氧化合成酶,单独影响MSCs的血管性因子分泌和免疫抑制.
科学领域:
- 干细胞生物学 干细胞生物学
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
背景情况:
- 介质细胞 stromal 细胞 (MSCs) 在炎症性肠道疾病 (IBD) 和围裂治疗方面得到了探索.
- 由于对宿主因子相互作用的理解不足,MSCs的持续治疗疗效受到阻碍.
- 了解MSC的功能需要研究其血管生成,伤口愈合和免疫抑制性能的调节剂.
研究的目的:
- 阐明调节血管新生因子分泌和免疫抑制在人类骨髓MSCs的机制.
- 为了确定肠道微血管对MSC功效和功能的影响.
- 在MSC中区分管理VEGF-A分泌和免疫抑制的调节途径.
主要方法:
- 在MSC中对18种血管生成/伤口愈合因素的分泌分析.
- 人类骨髓衍生MSCs和人类大肠微血管内皮细胞 (HLMVECs) 之间的共同培养实验.
- 在HLMVEC中药理上抑制内皮氧化合成酶 (eNOS).
主要成果:
- 血管内皮生长因子A (VEGF-A) 是MSCs分泌的最丰富的血管新生因子.
- 炎症性细胞因子IFNγ和TNFα降低了MSC的VEGF-A分泌,但HLMVECs没有影响MSC的活力或免疫抑制酶 (IDO) 诱导.
- HLMVECs通过内皮氧化合成酶 (eNOS) 减弱了MSC VEGF-A分泌,这是通过药理阻断可逆的机制.
结论:
- 维格-A的MSC分泌和免疫抑制功能是由不同的宿主机制调节的.
- HLMVECs通过eNOS减弱MSC的VEGF-A分泌,而不会影响MSC的生存能力或免疫抑制能力.
- 这些发现表明MSCs可分离的功能途径,为优化IBD细胞治疗提供了洞察力.
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