IGF-1降低矩阵金属蛋白酶8的调节,以促进斑块的稳定性:来自神经样细胞特异性MMP8在动脉样硬化中的证据
Patricia Snarski1,2,3, Sergiy Sukhanov1,2, Tadashi Yoshida1,2
1Section of Cardiology, John W. Deming Department of Medicine, Tulane University School of Medicine, New Orleans, Louisiana, United States of America.
PloS one
|September 24, 2025
概括
宏细胞特异性MMP8缺乏没有改变动脉样硬化斑块负担. 然而,类似胰岛素的生长因子-1
科学领域:
- 心血管研究研究心血管研究
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 巨细胞 (MF) 是动脉样硬化的关键参与者.
- 矩阵金属蛋白酶8 (MMP8) 降解原蛋白,并由炎症细胞表达.
- 对于MF特异性的MMP8在动脉样硬化中的作用尚不完全理解.
研究的目的:
- 研究巨细胞特异性MMP8缺乏对动脉样硬化斑块负担和稳定性的影响.
- 确定胰岛素样生长因子-1 (IGF-1) 是否影响巨细胞中MMP8的表达.
- 在动脉样硬化中探索向巨细胞MMP8的治疗潜力.
主要方法:
- 使用人类THP-1和小鼠MMP8-缺乏巨细胞进行体外研究,以评估IGF-1的影响.
- 产生患有巨细胞特异性MMP8缺乏症的小鼠或通过骨髓移植进行救援.
- 将IGF-1给实验小鼠和对照动物.
主要成果:
- 在培养的巨细胞中,IGF-1降低了MMP8和原酶活性.
- 在体内,IGF-1在ApoE-/-小鼠中降低了斑块MMP8和促炎细胞因子.
- 缺乏MMP8的巨细胞表现出M2极化;在斑块负担上没有观察到差异.
- IGF-1的原增强效应需要MMP8的表达,这是性别特定的 (女性).
结论:
- 巨细胞是IGF-1对斑块MMP8.8的下调的主要目标.
- 巨细胞MMP8在IGF-1对斑块稳定性的影响中起作用.
- 大菌MMP8代表了不稳定的动脉样硬化斑块的潜在治疗标.
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