TAILIEUCHUNG - Báo cáo y học: "Blockade of Toll-like receptor 2 prevents spontaneous cytokine release from rheumatoid arthritis ex vivo synovial explant cultures"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Blockade of Toll-like receptor 2 prevents spontaneous cytokine release from rheumatoid arthritis ex vivo synovial explant cultures. | Nic An Ultaigh et al. Arthritis Research Therapy 2011 13 R33 http content 13 1 R33 RESEARCH ARTICLE Open Access Blockade of Toll-like receptor 2 prevents spontaneous cytokine release from rheumatoid arthritis ex vivo synovial explant cultures 11 11 2 Sinéad Nic An Ultaigh Tajvur P Saber Jennifer McCormick Mary Connolly Jerome Dellacasagrande 2 2 2 2 2 1 1 Brian Keogh William McCormack Mary Reilly Luke A O Neill Peter McGuirk Ursula Fearon Douglas J Veale Abstract Introduction The aim of this study was to examine the effect of blocking Toll-like receptor 2 TLR2 in rheumatoid arthritis RA synovial cells. Methods RA synovial tissue biopsies obtained under direct visualization at arthroscopy were established as synovial explant cultures ex vivo or snap frozen for immunohistology. Mononuclear cell cultures were isolated from peripheral blood and synovial fluid of RA patients. Cultures were incubated with the TLR1 2 ligand Pam3CSK4 200 ng 1 and 10 gg ml an anti-TLR2 antibody OPN301 1 gg ml or an immunoglobulin G IgG 1 gg ml matched control. The comparative effect of OPN301 and adalimumab anti-tumour necrosis factor alpha on spontaneous release of proinflammatory cytokines from RA synovial explants was determined using quantitative cytokine MSD multiplex assays or ELISA. OPN301 penetration into RA synovial tissue explants cultures was assessed by immunohistology. Results Pam3CSK4 significantly upregulated interleukin IL -6 and IL-8 in RA peripheral blood mononuclear cells PBMCs RA synovial fluid mononuclear cells SFMCs and RA synovial explant cultures P . OPN301 significantly decreased Pam3CSK4-induced cytokine production of tumour necrosis factor alpha TNF-a IL-1P IL-6 interferon IFN -g and IL-8 compared to IgG control in RA PBMCs and SFMCs cultures all P . OPN301 penetration of RA synovial tissue cultures was detected in the lining layer and perivascular regions. OPN301 significantly decreased spontaneous cytokine production of TNF-a .

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