人类宫颈黏膜中存在具有独特抗原特异性的组织驻留 CD8+T 细胞群体。
Distinct populations of antigen-specific tissue-resident CD8+ T cells in human cervix mucosa.
机构信息
Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA.
Department of Laboratory Medicine and Pathology and.
出版信息
JCI Insight. 2021 Aug 9;6(15):e149950. doi: 10.1172/jci.insight.149950.
The ectocervix is part of the lower female reproductive tract (FRT), which is susceptible to sexually transmitted infections (STIs). Comprehensive knowledge of the phenotypes and T cell receptor (TCR) repertoire of tissue-resident memory T cells (TRMs) in the human FRT is lacking. We took single-cell RNA-Seq approaches to simultaneously define gene expression and TCR clonotypes of the human ectocervix. There were significantly more CD8+ than CD4+ T cells. Unsupervised clustering and trajectory analysis identified distinct populations of CD8+ T cells with IFNGhiGZMBloCD69hiCD103lo or IFNGloGZMBhiCD69medCD103hi phenotypes. Little overlap was seen between their TCR repertoires. Immunofluorescence staining showed that CD103+CD8+ TRMs were preferentially localized in the epithelium, whereas CD69+CD8+ TRMs were distributed evenly in the epithelium and stroma. Ex vivo assays indicated that up to 14% of cervical CD8+ TRM clonotypes were HSV-2 reactive in HSV-2-seropositive persons, reflecting physiologically relevant localization. Our studies identified subgroups of CD8+ TRMs in the human ectocervix that exhibited distinct expression of antiviral defense and tissue residency markers, anatomic locations, and TCR repertoires that target anatomically relevant viral antigens. Optimization of the location, number, and function of FRT TRMs is an important approach for improving host defenses to STIs.
宫颈外口是女性下生殖道(FRT)的一部分,易感染性传播感染(STI)。人们对 FRT 组织驻留记忆 T 细胞(TRM)的表型和 T 细胞受体(TCR)库缺乏全面了解。我们采用单细胞 RNA 测序方法,同时定义人类宫颈外口的基因表达和 TCR 克隆型。CD8+ T 细胞显著多于 CD4+ T 细胞。无监督聚类和轨迹分析确定了具有 IFNGhiGZMBloCD69hiCD103lo 或 IFNGloGZMBhiCD69medCD103hi 表型的不同 CD8+ T 细胞群。它们的 TCR 库之间几乎没有重叠。免疫荧光染色显示 CD103+CD8+ TRM 优先定位于上皮,而 CD69+CD8+ TRM 均匀分布在上皮和基质中。体外实验表明,多达 14%的宫颈 CD8+ TRM 克隆型在 HSV-2 血清阳性者中对 HSV-2 具有反应性,反映了生理相关的定位。我们的研究鉴定了人类宫颈外口的 CD8+ TRM 亚群,这些亚群表现出抗病毒防御和组织驻留标记物、解剖位置以及针对解剖相关病毒抗原的 TCR 库的不同表达。优化 FRT TRM 的位置、数量和功能是提高宿主对 STI 防御能力的重要方法。