C-type lectin receptor 2d forms homodimers and heterodimers with TLR2 to negatively regulate IRF5-mediated antifungal immunity.

C-type lectin receptor 2d forms homodimers and heterodimers with TLR2 to negatively regulate IRF5-mediated antifungal immunity.
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DOI:
10.1038/s41467-023-42216-3
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发表时间:
2023-10-23
影响因子:
16.6
通讯作者:
Jia, Xin-Ming
Jia, Xin-Ming
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Li, Fan;Wang, Hui;Li, Yan-Qi;Gu, Yebo;Jia, Xin-Ming

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C 型凝集素受体 (CLR) 或 Toll 样受体 (TLR) 的二聚化可以改变其配体结合能力,从而调节免疫反应。然而,CLR 和 TLR 之间二聚化的可能性和作用仍不清楚。在这里,我们展示了 C 型凝集素受体 2d (CLEC2D) 与 TLR2 形成同二聚体以及异二聚体。定量配体结合测定表明,CLEC2D 同二聚体和 CLEC2D/TLR2 异二聚体对真菌衍生的 β-葡聚糖的结合能力高于 TLR2 同二聚体。此外,同源或异源二聚体 CLEC2D 介导 β-葡聚糖诱导的 MyD88 泛素化和降解,从而抑制转录因子 IRF5 的激活和随后的 IL-12 产生。 Clec2d 缺陷的雌性小鼠能够抵抗白色念珠菌(一种人类真菌病原体)的感染,因为 IL-12 的产生增加以及随后产生 IFN-γ 的 NK 细胞的产生。总之,这些数据表明 CLEC2D 与 TLR2 形成同二聚体或异二聚体,TLR2 通过抑制 IRF5 介导的 IL-12 产生来负向调节抗真菌免疫。 CLEC2D 和 TLR2 的这些同源二聚体和异源二聚体提供了受体二聚化的例子,以调节宿主针对微生物感染的先天免疫。受体二聚化可以调节各种微生物感染期间的免疫反应。在此,作者表明,C 型凝集素受体 2d (CLEC2D) 通过与 TLR2 形成同二聚体或异二聚体来负向调节抗真菌免疫。
Dimerization of C-type lectin receptors (CLRs) or Toll-like receptors (TLRs) can alter their ligand binding ability, thereby modulating immune responses. However, the possibilities and roles of dimerization between CLRs and TLRs remain unclear. Here we show that C-type lectin receptor-2d (CLEC2D) forms homodimers, as well as heterodimers with TLR2. Quantitative ligand binding assays reveal that both CLEC2D homodimers and CLEC2D/TLR2 heterodimers have a higher binding ability to fungi-derived β-glucans than TLR2 homodimers. Moreover, homo- or hetero-dimeric CLEC2D mediates β-glucan-induced ubiquitination and degradation of MyD88 to inhibit the activation of transcription factor IRF5 and subsequent IL-12 production. Clec2d-deficient female mice are resistant to infection with Candida albicans, a human fungal pathogen, owing to the increase of IL-12 production and subsequent generation of IFN-γ-producing NK cells. Together, these data indicate that CLEC2D forms homodimers or heterodimers with TLR2, which negatively regulate antifungal immunity through suppression of IRF5-mediated IL-12 production. These homo- and hetero-dimers of CLEC2D and TLR2 provide an example of receptor dimerization to regulate host innate immunity against microbial infections. Receptor dimerization can modulate immune responses during various microbial infections. Here, the authors show that C-type lectin receptor-2d (CLEC2D) negatively regulates antifungal immunity through forming homodimers or heterodimers with TLR2.
CLEC5A 是针对李斯特菌感染的先天免疫的关键受体。
DOI: 10.1038/s41467-017-00356-3
发表时间: 2017-08-21
影响因子: 16.6
作者:
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