IRF5控制着巨细胞的偶然透,以促进腹腔大动脉动脉瘤的形成
Yidong Wang1, Zhenjie Liu2, Shen Song3
1Department of Cardiology, State Key Laboratory of Transvascular Implantation Devices, Provincial Key Laboratory of Cardiovascular Research, and.
JCI insight
|January 4, 2024
概括
干扰素调节因子5 (IRF5) 通过促进巨细胞透,驱动腹腔大动脉动脉瘤 (AAA). 针对IRF5-PI3Kγ通路可能是AAA的新治疗策略.
科学领域:
- 血管生物学和免疫学
- 心血管研究的心血管研究.
背景情况:
- 腹腔大动脉动脉瘤 (AAA) 是一种慢性炎症状况,涉及大动脉壁扩张.
- 巨细胞透到大动脉前列腺中是AAA血管重塑的关键驱动因素.
- 巨细胞衍生干扰素调节因子5 (IRF5) 在AAA病变发生过程中的特定作用以前是未知的.
研究的目的:
- 调查巨衍生的IRF5在腹腔大动脉瘤 (AAA) 形成和进展中的作用.
- 阐明IRF5在AAA中影响巨细胞行为的分子机制.
- 在AAA中评估针对IRF5路径的转化潜力.
主要方法:
- 对AAA adventitia的RNA测序以确定关键的转录因子.
- 利用全球和髓状细胞特异性的Irf5缺乏的小鼠模型来研究AAA的进展.
- 调查IRF5的下游目标,包括酸氨基酸3-激酶γ (PI3Kγ).
- 在小鼠模型中使用基因切除和救援策略对Pik3cg.
- 在人类AAA患者样本中分析IRF5和PI3Kγ表达.
主要成果:
- 鉴定出Irf5是AAA adventitia中最高上调的转录因子,主要由巨细胞表达.
- 全球和骨髓细胞特异性Irf5缺乏症显著降低了AAA的进展和巨细胞透.
- IRF5直接调节PI3Kγ,促进巨细胞的迁移.
- 皮克3cg切除损害了AAA的进展,而在Irf5缺乏的小鼠中恢复了AAA的进展和巨细胞透.
- 在人类AAA冒险者中观察到高的IRF5和PI3Kγ表达.
结论:
- IRF5-PI3Kγ信号轴对于巨细胞透和腹腔大动脉动脉瘤中的血管重塑至关重要.
- 通过PI3Kγ调节巨细胞迁移,IRF5在AAA病变发生过程中发挥着关键作用.
- 向IRF5-PI3Kγ通路代表了AAA治疗的潜在治疗策略.
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