Spatial distribution of IL4 controls iNKT cell-DC crosstalk in tumors

Spatial distribution of IL4 controls iNKT cell-DC crosstalk in tumors
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IL4 的空间分布控制肿瘤中 iNKT 细胞-DC 串扰

DOI:
10.1038/s41423-019-0243-z
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发表时间:
2019-06
期刊:
Cell Mol Immunol.
影响因子:
--
通讯作者:
Bai Li
Bai Li
中科院分区:
其他
文献类型:
--
作者:
Wang Lu;Liu Zhilan;Wang Lili;Wu Qielan;Li Xiang;Xie Di;Zhang Huimin;Zhang Yongdeng;Gu Lusheng;Xue Yanhong;Yue Ting;Liu Gang;Ji Wei;Wei Haiming;Xu Tao;Bai Li

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细胞因子的时空分布协调体内免疫应答,但其潜在机制仍有待探索。我们在这里表明,白细胞介素-4(IL-4)在不变的自然杀伤T(iNKT)细胞中的空间分布调节iNKT细胞和树突状细胞(DC)之间的串扰,并控制iNKT细胞介导的辅助性T细胞1型(Th 1)反应。强脂质抗原α-半乳糖神经酰胺(α-galactosylceramide,αGC)诱导IL 4持续极化,使IL 4在免疫突触(immunologicalsynapse,IS)聚集,促进IL 4 R-STAT 6(signaltransducersandactivatoroftranscription 6)通路的激活和DC中IL 12的产生,从而促进iNKT细胞中IFNγ的产生。相反,由具有短链或不饱和链的Th 2脂质抗原诱导的IL 4的非极化分泌不能增强这种iNKT细胞-DC串扰,从而将免疫应答转变为Th 2型应答。iNKT细胞中Cdc 42的降解导致IL 4响应Th 2脂质抗原的非极化分泌。此外,在肿瘤浸润的iNKT细胞中观察到Cdc 42表达减少,这损害了IL 4极化并干扰了肿瘤中的iNKT细胞-DC串扰。
The spatiotemporal distribution of cytokines orchestrates immune responses in vivo, yet the underlying mechanisms remain to be explored. We showed here that the spatial distribution of interleukin-4 (IL4) in invariant natural killer T (iNKT) cells regulated crosstalk between iNKT cells and dendritic cells (DCs) and controlled iNKT cell-mediated T-helper type 1 (Th1) responses. The persistent polarization of IL4 induced by strong lipid antigens, that is, α-galactosylceramide (αGC), caused IL4 accumulation at the immunological synapse (IS), which promoted the activation of the IL4R-STAT6 (signal transducer and activator of transcription 6) pathway and production of IL12 in DCs, which enhanced interferon-γ (IFNγ) production in iNKT cells. Conversely, the nonpolarized secretion of IL4 induced by Th2 lipid antigens with a short or unsaturated chain was incapable of enhancing this iNKT cell-DC crosstalk and thus shifted the immune response to a Th2-type response. The nonpolarized secretion of IL4 in response to Th2 lipid antigens was caused by the degradation of Cdc42 in iNKT cells. Moreover, reduced Cdc42 expression was observed in tumor-infiltrating iNKT cells, which impaired IL4 polarization and disturbed iNKT cell-DC crosstalk in tumors.
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IL4 的空间分布控制肿瘤中 iNKT 细胞-DC 串扰
DOI: 10.1038/s41423-019-0243-z
发表时间: 2019-06
期刊: Cell Mol Immunol.
影响因子: --
作者:
Wang Lu;Liu Zhilan;Wang Lili;Wu Qielan;Li Xiang;Xie Di;Zhang Huimin;Zhang Yongdeng;Gu Lusheng;Xue Yanhong;Yue Ting;Liu Gang;Ji Wei;Wei Haiming;Xu Tao;Bai Li
通讯作者: Bai Li