缺乏ERG的内皮将IL8-CXCR2轴确定为解决中性肺血管损伤的治疗点
Vigneshwaran Vellingiri1, Vijay Avin Balaji Ragunathrao1, Jagdish Chandra Joshi1
1Department of Pharmacology and Regenerative Medicine, University of Illinois Chicago, College of Medicine, Chicago, United States of America.
缺少Erg的内皮细胞会通过减少关键蛋白A20来触发中性粒细胞过度活化和组织损伤. 恢复A20或阻断CXCR2可以防止急性肺损伤.
科学领域:
- 血管生物学 血管生物学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 中性粒细胞 (PMN) 在组织中的积累有助于慢性血管疾病.
- 内皮细胞 (ECs) 控制PMN进入组织,但防止PMN激活急性肺损伤 (ALI) 的机制尚不清楚.
研究的目的:
- 研究Erg在内皮细胞 (ECs) 中调节中性粒细胞 (PMN) 行为的作用.
- 阐明在ALI中将EC功能障碍与PMN介导的炎症性损伤联系在一起的分子机制.
主要方法:
- 在EC中删除Erg的条件 (iEC-Erg-/-小鼠).
- 对PMN的转录组分析.
- 对NFκB激活,MIP2α/IL8分泌和CXCR2信号的评估.
- 在ALI患者样本上的研究.
- 在小鼠的基因过度表达和药理抑制实验中.
主要成果:
- 特定于EC的Erg除损害了A20合成,激活NFκB并增加EC分泌的MIP2α/IL8.
- 较高的MIP2α/IL8通过CXCR2激活PMN,导致炎症性损伤.
- 在ALI患者中观察到这些变化.
- 恢复A20或抑制CXCR2改善了PMN激活,并改善了小鼠的存活率.
结论:
- EC-Erg-A20轴对于控制肺部PMN积累和过度活化至关重要.
- 这一途径调节了PMN-CXCR2.2的EC介导IL-8激活.
- 针对这一轴为中性友炎性血管疾病提供了潜在的治疗策略.
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