A signature of aberrant immune responsiveness identifies myocardial dysfunction in rheumatoid arthritis.

Davis, J.M. 3rd, Knutson, K.L., Strausbauch, M.A., Crowson, C.S., Therneau, T.M., Wettstein, P.J., Roger, V.L., Matteson, E.L., Gabriel, S.E.
Journal   Arthritis Rheum.
Species  
Analytes Measured   G-CSF , GM-CSF , IL-10 , IL-12 Total , IL-13 , IL-17A , IL-2 , IL-4 , IL-5 , IL-6 , IL-7 , IL-8 , MCP-1
Matrix Tested   Peripheral blood mononuclear cell (PBMC) culture supernatants
Year   2011
Volume   63
Page Numbers   1497-1506
Application   Cytokines and Chemokines
Abstract

OBJECTIVE: Heart failure is an important cause of death in patients with rheumatoid arthritis (RA). Evidence suggests that immune mechanisms contribute to myocardial injury and fibrosis, leading to left ventricular diastolic dysfunction (LVDD). The purpose of this study was to identify a signature of LVDD in patients with RA by analyzing the responsiveness of the innate and adaptive immune systems to stimulation ex vivo.

METHODS: RA patients (n=212) enrolled prospectively in a population-based cohort underwent echocardiography, and LV function was classified as normal, mild LVDD, or moderate-to-severe LVDD. The release of 17 cytokines by blood mononuclear cells in response to stimulation with a panel of 7 stimuli or in media alone was analyzed using multiplex immunoassays. Logistic regression models were used to test for associations between a multicytokine immune response score and LVDD, after adjusting for clinical covariates.

RESULTS: An 11-cytokine profile effectively differentiated patients with moderate-to-severe LVDD from those with normal LV function. An immune response score (range 0-100) was strongly associated with moderate-to-severe LVDD (odds ratio per 10 units 1.5 [95% confidence interval 1.2-2.1]) after adjusting for serum interleukin-6 levels, brain natriuretic peptide values, and glucocorticoid use, as well as other RA characteristics and LVDD risk factors.

CONCLUSION: The major finding of this study was that aberrant systemic immune responsiveness is associated with advanced myocardial dysfunction in patients with RA. The unique information added by the immune response score concerning the likelihood of LVDD warrants future longitudinal studies of its value in predicting future deterioration in myocardial function.

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IFN-γ, IL-1β, IL-6, TNF-α | Human
Multiplex
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