Journal
NATURE REVIEWS RHEUMATOLOGY
Volume 16, Issue 6, Pages 316-333Publisher
NATURE RESEARCH
DOI: 10.1038/s41584-020-0413-5
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Funding
- NIAMS NIH HHS [R01 AR065466, R01 AR071321] Funding Source: Medline
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Rheumatoid arthritis (RA) is a chronic immune-mediated disease that primarily affects the synovium of diarthrodial joints. During the course of RA, the synovium transforms into a hyperplastic invasive tissue that causes destruction of cartilage and bone. Fibroblast-like synoviocytes (FLS), which form the lining of the joint, are epigenetically imprinted with an aggressive phenotype in RA and have an important role in these pathological processes. In addition to producing the extracellular matrix and joint lubricants, FLS in RA produce pathogenic mediators such as cytokines and proteases that contribute to disease pathogenesis and perpetuation. The development of multi-omics integrative analyses have enabled new ways to dissect the mechanisms that imprint FLS, have helped to identify potential FLS subsets with distinct functions and have identified differences in FLS phenotypes between joints in individual patients. This Review provides an overview of advances in understanding of FLS biology and highlights omics approaches and studies that hold promise for identifying future therapeutic targets. Fibroblast-like synoviocytes in rheumatoid arthritis have an aggressive phenotype caused, in part, by epigenetic imprinting, which contributes to various pathological processes. Understanding the mechanisms underlying the cell abnormalities and phenotypes, including their spatial and temporal differences, could lead to new therapies.
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