HMGB1通过启动NETs来调节巨细胞极化,从而影响肠上皮屏障
Xiaohong Chen1, Junyi Wu2, Meng Liu1
1Department of Gastroenterology, Wuhan Third Hospital (Tongren Hospital of Wuhan University), Wuhan, China.
General physiology and biophysics
|November 25, 2024
概括
高流动性组盒1 (HMGB1) 促进中性粒细胞外细胞陷 (NET) 的形成,驱动M1巨细胞的两极分化,并损害肠道屏障功能. 抑制HMGB1可能为肠道疾病提供新的治疗方法.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
背景情况:
- 高流动性组盒1 (HMGB1) 与免疫激活和巨细胞两极分化有关.
- HMGB1在调节巨细胞表型中的精确作用及其对肠上皮质屏障完整性的影响需要进一步研究.
- 了解HMGB1在中性粒细胞外细胞陷 (NET) 形成和巨细胞相互作用中的参与,对于解决肠道炎症和屏障功能障碍至关重要.
研究的目的:
- 调查HMGB1和巨细胞极化表型之间的关系.
- 分析与HMGB1受影响的巨细胞和肠道上皮细胞共同培养后CaCo-2细胞增殖和细胞因子概况的变化.
- 阐明HMGB1影响肠上皮质屏障功能的机制.
主要方法:
- 研究了HMGB1表达和巨细胞极化之间的相关性.
- 评估了HMGB1对中性粒细胞外细胞陷 (NET) 形成的影响.
- 与CaCo-2肠上皮细胞共培养的HMGB1受影响的巨细胞,以评估细胞增殖,细胞亡和细胞因子的产生.
- 分析了CaCo-2细胞中紧结蛋白表达的变化.
主要成果:
- 增加HMGB1表达增强了NET形成.
- 抑制NET形成诱导了巨细胞从抗炎M2转移到促炎M1表型.
- 含有HMGB1的NET促进了CaCo-2细胞亡和恶化的炎症.
- 含有HMGB1的NETs通过减少密集结蛋白表达而损害了肠道上皮质屏障功能,这种表达是由M1巨分极介导的.
结论:
- HMGB1上调驱动NET形成,导致M1巨细胞两极分化和肠道屏障功能受损.
- 抑制HMGB1的表达可以减少NET的形成,调节巨细胞的两极分化,并可能防止肠道屏障受损.
- 向HMGB1为肠道疾病提供了一个有前途的治疗策略,其特点是炎症和屏障功能障碍.
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