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在小鼠结肠炎模型中,tarm1可能通过调节巨细胞M1偏振来影响结肠炎
Kun Zhang1, Lingfen Xu1, Jing Guo2
1Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, Liaoning, PR China.
Pediatric research
|November 2, 2024
概括
在患有大肠炎的青少年小鼠中,Tarm1的水平升高,导致巨细胞M1两极分化和肠道屏障功能障碍. 减少Tarm1显示出治疗儿科炎性肠病的潜力.
科学领域:
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 青少年炎症性肠病 (IBD) 在了解疾病机制方面提出了独特的挑战.
- 在儿科IBD中Tarm1的作用及其对肠道屏障完整性的影响仍然在很大程度上未被探索.
研究的目的:
- 在未成年小鼠的硫酸 (DSS) 诱导大肠炎模型中研究Tarm1的功能.
- 阐明Tarm1在儿科结肠炎期间影响肠道屏障功能的机制.
主要方法:
- 在4周大的幼年小鼠中建立了DSS诱导的大肠炎模型.
- 通过H&E染色来评估疾病活性和组织病理学.
- 量化Tarm1,F4/80,CD68和CD86的表达,使用qPCR,西式涂抹和免疫光.
- 测量过表皮电阻 (TEER) 来评估肠道屏障功能.
主要成果:
- 患有DSS诱导的大肠炎的青少年小鼠表现出结肠Tarm1表达的增加,巨细胞M1极化升高,以及增强的促炎细胞因子.
- 这些小鼠还显示了肠道粘膜屏障的显著损伤.
- 在RAW264.7细胞中Tarm1敲击抑制了脂聚糖 (LPS) 诱导的M1极化,并在共同培养的肠细胞中减轻了屏障损伤.
结论:
- 在患有大肠炎的青少年小鼠的结肠组织中,Tarm1的表达被上调.
- 减少巨细胞中的Tarm1表达减弱了LPS诱导的M1极化和肠道屏障损伤.
- 准Tarm1为儿科炎性肠病提供了一个有前途的治疗策略.
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