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Defining inflammatory cell states in rheumatoid arthritis joint synovial tissues by integrating single-cell transcriptomics and mass cytometry.


ABSTRACT: To define the cell populations that drive joint inflammation in rheumatoid arthritis (RA), we applied single-cell RNA sequencing (scRNA-seq), mass cytometry, bulk RNA sequencing (RNA-seq) and flow cytometry to T cells, B cells, monocytes, and fibroblasts from 51 samples of synovial tissue from patients with RA or osteoarthritis (OA). Utilizing an integrated strategy based on canonical correlation analysis of 5,265 scRNA-seq profiles, we identified 18 unique cell populations. Combining mass cytometry and transcriptomics revealed cell states expanded in RA synovia: THY1(CD90)+HLA-DRAhi sublining fibroblasts, IL1B+ pro-inflammatory monocytes, ITGAX+TBX21+ autoimmune-associated B cells and PDCD1+ peripheral helper T (TPH) cells and follicular helper T (TFH) cells. We defined distinct subsets of CD8+ T cells characterized by GZMK+, GZMB+, and GNLY+ phenotypes. We mapped inflammatory mediators to their source cell populations; for example, we attributed IL6 expression to THY1+HLA-DRAhi fibroblasts and IL1B production to pro-inflammatory monocytes. These populations are potentially key mediators of RA pathogenesis.

SUBMITTER: Zhang F 

PROVIDER: S-EPMC6602051 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Defining inflammatory cell states in rheumatoid arthritis joint synovial tissues by integrating single-cell transcriptomics and mass cytometry.

Zhang Fan F   Wei Kevin K   Slowikowski Kamil K   Fonseka Chamith Y CY   Rao Deepak A DA   Kelly Stephen S   Goodman Susan M SM   Tabechian Darren D   Hughes Laura B LB   Salomon-Escoto Karen K   Watts Gerald F M GFM   Jonsson A Helena AH   Rangel-Moreno Javier J   Meednu Nida N   Rozo Cristina C   Apruzzese William W   Eisenhaure Thomas M TM   Lieb David J DJ   Boyle David L DL   Mandelin Arthur M AM   Boyce Brendan F BF   DiCarlo Edward E   Gravallese Ellen M EM   Gregersen Peter K PK   Moreland Larry L   Firestein Gary S GS   Hacohen Nir N   Nusbaum Chad C   Lederer James A JA   Perlman Harris H   Pitzalis Costantino C   Filer Andrew A   Holers V Michael VM   Bykerk Vivian P VP   Donlin Laura T LT   Anolik Jennifer H JH   Brenner Michael B MB   Raychaudhuri Soumya S  

Nature immunology 20190506 7


To define the cell populations that drive joint inflammation in rheumatoid arthritis (RA), we applied single-cell RNA sequencing (scRNA-seq), mass cytometry, bulk RNA sequencing (RNA-seq) and flow cytometry to T cells, B cells, monocytes, and fibroblasts from 51 samples of synovial tissue from patients with RA or osteoarthritis (OA). Utilizing an integrated strategy based on canonical correlation analysis of 5,265 scRNA-seq profiles, we identified 18 unique cell populations. Combining mass cytom  ...[more]

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