数字农科院2.0

Cold-blooded vertebrates evolved regulatory B cells to participate in inflammatory diseases

文献类型： 外文期刊

作者： Jie Wang;Wen Jing Dong;Tian Tian Tian;Chang Song Wu;Xiang Yang Zhang;Ya Zhen Hu;Yi Ru Pan;Xue Qing Han;Jun Li;Carolina Tafalla;Yong An Zhang;Xu Jie Zhang

作者机构：

关键词： （0-1-3）Evolution;IL-10;IL-35;Inflammatory bowel disease;Regulatory B cell

期刊名称： Cell Communication and Signaling

ISSN： 1478-811X

年卷期： 2025 年 23 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： Background: Regulatory B cell (Breg), known for its immunosuppressive properties through the provision of IL-10, plays a critical role in the control of inflammatory diseases. Although Breg has been discovered for over two decades in mammals, its existence in non-mammalian vertebrates remains unclear. Here, we aimed to explore the differentiation mechanism and functional profiles of teleost CD25L+ Breg to gain insights into the origin and evolution of Breg. Methods: Flow cytometry, RNA-seq, qPCR, morphological analysis, immunoblotting, immunofluorescence, recombinant IL-35 stimulation, cell co-culture in Transwell system were performed to reveal the phenotypic features, differentiation mechanism and suppressive functions of teleost CD25L+ Breg. To elucidate the immunoregulatory role of CD25L+ Breg in vivo, bacterial infection and inflammatory bowel disease (IBD) models were established in teleost fish. Systemic and local inflammatory responses were assessed by flow cytometry, immunofluorescence, histological analysis, and cytokine measurements. Results: Phenotypically, we identified a unique IgM+CD25L+ B cell subset, termed CD25L+ B cells, characterized by their capacity to produce IL-10 and IL-12p35 in a cold-blooded vertebrate, the grass carp. Mechanistically, IL-35 stimulation induced the differentiation of CD25L− B cells into CD25L+ B cells, promoting the production of IL-35 and IL-10 via STAT3 activation. Functionally, teleost CD25L+ B cells served as a conventional Breg subtype that exerted its immunosuppressive functions on effector T cells and neutrophils via cell contact or cytokine delivery. Upon bacterial infection, CD25L+ Breg increased earlier than CD25L+ Treg and produced IL-10. In a 2,4,6-trinitrobenzene sulfonic acid (TNBS)-induced IBD model, Breg frequency and IL-10 levels increased significantly during IBD remission, and Breg adoptive transfer could prevent IBD development and contribute to intestinal tissue repair. Conclusions: These novel findings reveal that fish have evolved Breg with specialized anti-inflammatory functions, providing evolutionary insights into the phylogenetic origin and functional conservation of Breg from fish to mammals.

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