hUC-MSCs通过调节肠道微生物群来减轻ApoE-/-小鼠的高脂肪饮食引起的动脉样硬化
Lin Yang1, Bing Xia1, Tianbao Qian2
1School of Forensic Medicine, Guizhou Medical University, Guiyang, 550000, Guizhou, China.
Heliyon
|November 19, 2024
概括
人类带介质干细胞 (hUC-MSCs) 通过调节肠道微生物群和减少炎症来增强动脉样硬化斑块的稳定性. 这种干预改善了生物力学特性,最大限度地降低了破裂风险.
科学领域:
- 心血管生物学 心血管生物学
- 干细胞疗法是一种干细胞疗法.
- 微生物组研究 微生物组研究
背景情况:
- 动脉样硬化症的特征是斑块不稳定,增加破裂风险.
- 高脂肪饮食 (HFD) 破坏肠道微生物群,促进炎症,导致斑块不稳定.
- 人类带介质干细胞 (hUC-MSCs) 正在研究它们在心血管疾病中的治疗潜力.
研究的目的:
- 研究hUC-MSCs调节动脉样硬化斑块稳定性的机制.
- 在动脉样硬化小鼠模型中探索hUC-MSCs对肠道微生物群组成和炎症标志物的影响.
- 评估hUC-MSCs对动脉样硬化斑块的生物力学特性的影响.
主要方法:
- 在ApoE-/-小鼠中使用HFD诱导动脉样硬化.
- 小鼠接受了hUC-MSCs治疗,并对收集的组织和便样本进行了各种分析.
- 方法包括组织学染色 (HE,油红色O,Masson),16srRNA对肠道微生物群的基因测序,原子力显微镜 (AFM) 对斑块Young的模量,以及对炎症因素的免疫组织化学/免疫光学 (NLRP3,IL-1β,IL-18).
主要成果:
- HFD引发了斑块不稳定性,其特点是Young的模量减少和NLRP3表达增加,以及肠道微生物群的改变 (Firmicutes/Bacteroidetes比率增加).
- hUC-MSCs治疗逆转了这些变化,显著改善了斑块形态特征和生物力学特性.
- hUC-MSCs的干预导致增强了斑块稳定性和减少了Firmicutes与Bacteroidetes的比率.
结论:
- HFD破坏了肠道微生物群的稳定性,并提高了NLRP3的表达,降低了斑块的生物力学稳定性.
- 通过调节肠道微生物群和NLRP3表达,hUC-MSCs治疗可以改善斑块的不稳定性.
- hUC-MSCs改善了斑块的生物力学特性,从而提高了稳定性并降低了斑块破裂的风险.
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