Abstract：
:Aberrant immune responses characterize autoimmune disorders like Rheumatoid Arthritis (RA) wherein lymphocytes are recognized as key players. Role of CD8+ T cells in RA has been less defined however we found that these cells are activated in RA patients with increased expression of cytolytic granules and inflammatory mediators thereby modulating immune responses contributing to disease severity. Though unconventional expression of different Toll Like Receptors (TLRs) on CD8+ T cells has been proposed but their expression and role in T cell activation and differentiation in RA still remains obscure. Herein we report, for the first time, an increased expression of TLR4 on peripheral CD8+ T cells of RA patients and its role in skewing CD8+ T cells towards activated and inflammatory phenotype thereby playing a significant role in pathogenesis and progression of RA. We found that the surface expression of TLR4 on CD8+ T cells directly correlates with disease severity. Moreover, these CD8+ T cells respond to the TLR4 ligand LPS and express robust amounts of cytotolytic and inflammatory molecules including TNFα and IFNγ. Our study hence identifies an important role for CD8+ T cells in orchestrating RA through TLR4 mediated activation and differentiation.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Tripathy A,Khanna S,Padhan P,Smita S,Raghav S,Gupta Bdoi
10.1038/s41598-017-01033-7subject
Has Abstractpub_date
2017-04-19 00:00:00pages
933issue
1issn
2045-2322pii
10.1038/s41598-017-01033-7journal_volume
7pub_type
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