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Ⅰ型干扰素通过 B 细胞内在信号和树突状细胞依赖的 Th1 和 Tfh 细胞谱系促进生发中心形成。

Type I Interferons Promote Germinal Centers Through B Cell Intrinsic Signaling and Dendritic Cell Dependent Th1 and Tfh Cell Lineages.

机构信息

Immunology Section, Lund University, Lund, Sweden.

Department of Health Technology, Technical University of Denmark, Lyngby, Denmark.

出版信息

Front Immunol. 2022 Jul 13;13:932388. doi: 10.3389/fimmu.2022.932388. eCollection 2022.

DOI:10.3389/fimmu.2022.932388
PMID:35911733
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9326081/
Abstract

Type I interferons (IFNs) are essential for antiviral immunity, appear to represent a key component of mRNA vaccine-adjuvanticity, and correlate with severity of systemic autoimmune disease. Relevant to all, type I IFNs can enhance germinal center (GC) B cell responses but underlying signaling pathways are incompletely understood. Here, we demonstrate that a succinct type I IFN response promotes GC formation and associated IgG subclass distribution primarily through signaling in cDCs and B cells. Type I IFN signaling in cDCs, distinct from cDC1, stimulates development of separable Tfh and Th1 cell subsets. However, Th cell-derived IFN-γ induces T-bet expression and IgG2c isotype switching in B cells prior to this bifurcation and has no evident effects once GCs and Tfh cells developed. This pathway acts in synergy with early B cell-intrinsic type I IFN signaling, which reinforces T-bet expression in B cells and leads to a selective amplification of the IgG2c GC B cell response. Despite the strong Th1 polarizing effect of type I IFNs, the Tfh cell subset develops into IL-4 producing cells that control the overall magnitude of the GCs and promote generation of IgG1 GC B cells. Thus, type I IFNs act on B cells and cDCs to drive GC formation and to coordinate IgG subclass distribution through divergent Th1 and Tfh cell-dependent pathways.

摘要

I 型干扰素 (IFNs) 是抗病毒免疫的必要条件,似乎代表了 mRNA 疫苗佐剂的关键组成部分,并且与系统性自身免疫性疾病的严重程度相关。与所有人相关的是,I 型 IFNs 可以增强生发中心 (GC) B 细胞反应,但潜在的信号通路尚未完全了解。在这里,我们证明简洁的 I 型 IFN 反应主要通过 cDCs 和 B 细胞中的信号转导来促进 GC 形成和相关 IgG 亚类分布。cDC 中的 I 型 IFN 信号转导与 cDC1 不同,可刺激可分离的 Tfh 和 Th1 细胞亚群的发育。然而,Th 细胞衍生的 IFN-γ 在这种分支之前诱导 B 细胞中的 T-bet 表达和 IgG2c 同种型转换,并且一旦 GC 和 Tfh 细胞发育,就没有明显的影响。该途径与早期 B 细胞内在的 I 型 IFN 信号协同作用,该信号增强 B 细胞中的 T-bet 表达,并导致 IgG2c GC B 细胞反应的选择性扩增。尽管 I 型 IFNs 具有强烈的 Th1 极化作用,但 Tfh 细胞亚群发育成产生 IL-4 的细胞,控制 GC 的总体幅度并促进 IgG1 GC B 细胞的产生。因此,I 型 IFNs 作用于 B 细胞和 cDC 以驱动 GC 形成,并通过不同的 Th1 和 Tfh 细胞依赖的途径协调 IgG 亚类分布。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/8ba5840704e8/fimmu-13-932388-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/9bd0f44d8d0c/fimmu-13-932388-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/1739d76b16d0/fimmu-13-932388-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/aed7e1d5743c/fimmu-13-932388-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/bba7ce933293/fimmu-13-932388-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/60c8005a39be/fimmu-13-932388-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/1fb6246d6e51/fimmu-13-932388-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/9603ae972f5a/fimmu-13-932388-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/8ba5840704e8/fimmu-13-932388-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/9bd0f44d8d0c/fimmu-13-932388-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/1739d76b16d0/fimmu-13-932388-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/aed7e1d5743c/fimmu-13-932388-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/bba7ce933293/fimmu-13-932388-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/60c8005a39be/fimmu-13-932388-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/1fb6246d6e51/fimmu-13-932388-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/9603ae972f5a/fimmu-13-932388-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ad9/9326081/8ba5840704e8/fimmu-13-932388-g008.jpg

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