Unveiling the heterogeneity of NKT cells in the liver through single cell RNA sequencing.

Unveiling the heterogeneity of NKT cells in the liver through single cell RNA sequencing.
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通过单细胞 RNA 测序揭示肝脏中 NKT 细胞的异质性

DOI:
10.1038/s41598-020-76659-1
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发表时间:
2020-11-10
期刊:
影响因子:
4.6
通讯作者:
Liu X
Liu X
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Shen H;Gu C;Liang T;Liu H;Guo F;Liu X

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CD 1d依赖性I型NKT细胞被脂质抗原激活,已知在先天性和适应性免疫中发挥重要作用,作为II型NKT细胞的一部分。然而,NKT细胞,特别是NKT样细胞的异质性在很大程度上仍然未知。在此,我们报告了通过单细胞RNA测序分析野生型(WT)、Jα18缺陷型和CD 1d缺陷型小鼠肝脏中NKT(NK1.1+ CD 3e+)细胞的谱。无偏转录聚类显示不同的细胞亚群。转录组学谱鉴定了众所周知的CD 1d依赖性NKT细胞,并定义了两个CD 1d非依赖性NKT细胞亚群。此外,标记基因的验证揭示了肝脏肿瘤进展期间NKT细胞亚群的不同器官分布和景观。更重要的是,我们发现CD 1d非依赖性Sca-1− CD 62 L +NKT细胞在体外与IL-2、IL-12和IL-18共刺激后表现出较强的分泌IFN-γ的能力。总的来说,我们的研究结果提供了NKT细胞异质性的全面表征,并揭示了以前未定义的功能NKT细胞亚群。
CD1d-dependent type I NKT cells, which are activated by lipid antigen, are known to play important roles in innate and adaptive immunity, as are a portion of type II NKT cells. However, the heterogeneity of NKT cells, especially NKT-like cells, remains largely unknown. Here, we report the profiling of NKT (NK1.1+CD3e+) cells in livers from wild type (WT), Jα18-deficient and CD1d-deficient mice by single-cell RNA sequencing. Unbiased transcriptional clustering revealed distinct cell subsets. The transcriptomic profiles identified the well-known CD1d-dependent NKT cells and defined two CD1d-independent NKT cell subsets. In addition, validation of marker genes revealed the differential organ distribution and landscape of NKT cell subsets during liver tumor progression. More importantly, we found that CD1d-independent Sca-1−CD62L+NKT cells showed a strong ability to secrete IFN-γ after costimulation with IL-2, IL-12 and IL-18 in vitro. Collectively, our findings provide a comprehensive characterization of NKT cell heterogeneity and unveil a previously undefined functional NKT cell subset.
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