Kaustav Chowdhury, Uma Kumar, Jaydeep Chaudhuri, Prabin Kumar, Soumabha Das, Maumita Kanjilal, Parasar Ghosh, Ravi Kiran Basyal, Uma Kanga, Santu Bandyopadhaya, Dipendra Kumar Mitra
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Engaging PD-1 rescues regulatory T cell function and inhibits inflammatory T cells in rheumatoid arthritis.
Background: Despite their synovial enrichment Regulatory T cells (Treg) fail to alleviate the joint inflammation in rheumatoid arthritis (RA). This indicates their functional impairment in the synovial milieu of RA patients.
Results: Here, we demonstrate that deficit in PD-1 pathway incapacitates the synovial Treg cells and engaging PD-1 restores their suppressive function (IL-10, TGF-β secretion) which in turn suppressed the synovial inflammatory T cells (IFN-γ+, IL-17+ TNF-α+). We also showed deficit in programmed death ligand-1 (PD-L1) expression on RA synovial macrophages contributes to impaired Treg cell function.
Conclusion: Rejuvenating synovial Treg cell function via PD-1 engagement may be a potential strategy to ameliorate the synovial inflammation in RA patients.
期刊介绍：
Clinical & Experimental Immunology (established in 1966) is an authoritative international journal publishing high-quality research studies in translational and clinical immunology that have the potential to transform our understanding of the immunopathology of human disease and/or change clinical practice.
The journal is focused on translational and clinical immunology and is among the foremost journals in this field, attracting high-quality papers from across the world. Translation is viewed as a process of applying ideas, insights and discoveries generated through scientific studies to the treatment, prevention or diagnosis of human disease. Clinical immunology has evolved as a field to encompass the application of state-of-the-art technologies such as next-generation sequencing, metagenomics and high-dimensional phenotyping to understand mechanisms that govern the outcomes of clinical trials.
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