一个骨髓系意味着克罗恩病的抗瘤坏死因子抵抗力
Sachith Munasinghe1, Duke Geem2, Kodhai Duraiarasan1
1Division of Pediatric Gastroenterology, Emory University School of Medicine, Atlanta, Georgia.
Cellular and molecular gastroenterology and hepatology
|September 25, 2025
概括
肠道粘膜中表达信号调节蛋白α (SIRPα) 的髓状细胞增加可能会导致克罗恩氏病患者对抗瘤坏死因子 (TNF) 治疗的抵抗力.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 分子生物学分子生物学
背景情况:
- 抗瘤坏死因子 (TNF) 治疗是克罗恩病 (CD) 管理的基石.
- 很大一部分患者患有耐火性CD,对抗TNF药物表现出耐药性.
- 在CD中抗TNF不响应的潜在机制在很大程度上是未知的.
研究的目的:
- 为了研究表达信号调节蛋白α (SIRPα) 的髓质细胞在耐火性CD中的作用.
- 探索SIRPα+细胞作为克罗恩病中抗TNF耐药性的潜在机制.
主要方法:
- 用高维流细胞计和RNA测序分析周围血液和粘膜活检.
- 在克罗恩病中对抗TNF反应者和不反应者的SIRPα+细胞进行比较.
- 在实验室中挑战由受刺激的SIRPα+细胞产生的秘密体的乳房器官.
主要成果:
- 耐火性CD患者在肠道粘膜中显示出显著更高的CD33+HLA-DR+CD11c+SIRPα+髓状细胞水平.
- 来自肠道的SIRPα+细胞表现出高的亲炎性转录组,IL-6,TNFα和IL-1β的表达增加.
- 耐火性CD患者刺激的SIRPα+细胞的分泌体损害了上皮细胞功能,促进了先天性免疫反应和细胞死亡.
结论:
- 粘膜上升的SIRPα+髓质细胞有助于上皮功能障碍,可能解释克罗恩病中抗TNF耐药性的机制.
- 粘膜SIRPα+细胞的丰富性要求进一步研究作为耐火性CD的潜在生物标志物和治疗点.
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