TNFSF13不足会破坏人类结肠上皮细胞介导的B细胞分化
Xianghui Ma1, Noor Dawany2, Ayano Kondo3
1Division of Gastroenterology, Hepatology, and Nutrition; Department of Pediatrics; Children's Hospital of Philadelphia; Philadelphia, PA, 19104, USA.
bioRxiv : the preprint server for biology
|October 10, 2024
概括
一种瘤坏死因子超级家族成员13 (TNFSF13) 的新型变体损害了其分泌,促进了结肠上皮细胞的生长,改变了B细胞相互作用,可能影响炎症性肠病.
科学领域:
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 粘膜愈合依赖于上皮和免疫细胞的通信,在炎症性肠病 (IBD) 中被破坏的过程.
- 瘤亡因子超级家族成员13 (TNFSF13) 对B细胞功能至关重要,但其在结肠上皮细胞和IBD中的作用尚不清楚.
研究的目的:
- 研究一种新型单基TNFSF13变异对结肠上皮细胞及其与B细胞相互作用的功能影响.
- 阐明表皮TNFSF13在调节结肠表皮恒常的作用及其对IBD病原发生的潜在贡献.
主要方法:
- 利用患者活检,组织衍生的结肠蛋白和诱导多能干细胞 (iPSC) 衍生的结肠器官来模拟TNFSF13变异效应.
- 采用单细胞RNA测序,流细胞计,共免疫沉和成像质细胞计来分析细胞反应和相互作用.
- 与记忆B细胞进行共同培养实验,以评估对免疫球蛋白A (IgA) + 血细胞生产的影响.
主要成果:
- TNFSF13变体的结肠体显示TNFSF13分泌量减少了50%以上,上皮细胞增殖增加,细胞亡减少.
- 确定FAS是TNFSF13.13的主要结肠上皮受体.
- 在TNFSF13变体结肠组织中观察到上皮相关B细胞的增加.
- 与记忆B细胞共同培养显示,在TNFSF13变异结肠杆菌设置中,IgA+血细胞生成减少.
结论:
- 表皮TNFSF13作为结肠表皮细胞生长和增殖的关键调节剂.
- TNFSF13影响上皮细胞与B细胞的交叉交互,影响IgA+血细胞的分化.
- 这些发现表明一种新的机制,通过这种机制,上皮TNFSF13功能障碍可能导致炎症性肠病.
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