乳腺细胞有助于组织皮耶尔补丁利基,用于诱导IgA反应
Marco De Giovanni1,2, Vivasvan S Vykunta1,3, Adi Biram1
1Howard Hughes Medical Institute and Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143, USA.
Science immunology
|March 1, 2024
概括
乳腺细胞引导免疫细胞称为常规树突细胞2型 (cDC2s) 到佩耶斑 (PPs) 使用受体GPR35.5. 这种定位对于启动肠道IgA免疫反应至关重要.
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:
- 皮耶斑块 (PPs) 是肠道IgA反应的关键诱导部位.
- 传统的树突细胞2型 (cDC2s) 对于在PPs中启动IgA同型切换至关重要.
- 在皮耶尔补丁下皮质圆顶 (SED) 中控制cDC2定位的精确机制在很大程度上是未知的.
研究的目的:
- 阐明控制cDC2s在皮耶尔补丁SED中的定位的分子机制.
- 研究G蛋白结合受体35 (GPR35) 在cDC2迁移和IgA诱导中的作用.
- 确定巨细胞及其代谢物对cDC2局部化和IgA反应的贡献.
主要方法:
- 在皮耶尔补丁cDC2s中分析GPR35表达.
- 产生和分析缺乏GPR35的小鼠和嵌合体小鼠.
- 评估IgA+B细胞,IgA血细胞,以及共生细菌的IgA涂层.
- 使用乳腺细胞缺乏的小鼠和乳腺细胞特异性基酶1 (Tph1) 脱离的小鼠进行的研究.
主要成果:
- 皮耶补丁cDC2s表达GPR35,这是代谢物5-氧乙酸 (5-HIAA) 的受体.
- 在cDC2s或巨细胞中缺乏GPR35会损害SED中的cDC2积累,减少IgA+生殖中心B细胞和IgA血细胞,并减少IgA对抗原的反应.
- 巨细胞有助于cDC2在SED中的定位,可能是通过5-HIAA生产.
结论:
- 来自母细胞的5-HIAA通过GPR35对cDC2s起作用,引导cDC2在皮耶尔补丁SED中的定位.
- 这种巨细胞-cDC2相互作用对于诱导强大的肠道IgA免疫反应至关重要.
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