- האם מופיעים נוגדנים ספציפיים האופייניים לדלקת פרקים (נוגדני anti-CCP2 antibody)?
- מה רמת האומגה 3 (EPA+DHA) בתאי הדם האדומים?
- האם האדם צרך או לא צרך שמן דגים?
Lower omega-3 fatty acids are associated withthe presence of anti-cyclic citrullinatedpeptide autoantibodies in a population at riskfor future rheumatoid arthritis: a nestedcase-control study
Ryan W. Gan1, Kendra A. Young1, Gary O. Zerbe2, M. Kristen Demoruelle3,Michael H. Weisman4, Jane H. Buckner5, Peter K. Gregersen6, Ted R. Mikuls7,James R. O’Dell7, Richard M. Keating8, Michael J. Clare-Salzler9,Kevin D. Deane3, V. Michael Holers3and Jill M. Norris1
Objective.The aim of this study was to investigate omega-3 fatty acid (FA) supplement use and omega-3FAs in erythrocyte membranes [omega-3 FA % in erythrocyte membranes (RBC)] and their associationwith anti-CCP autoantibodies in a population without RA, but who are at genetic risk for RA.
Methods.The multicentre Studies of the Etiology of RA (SERA) cohort includes RA-free subjects who arefirst-degree relatives of RA probands or are enriched with the HLA-DR4 allele. In a nested case-controlstudy, 30 SERA cases were identified who were anti-CCP2 antibody positive. We further identified 47autoantibody negative controls, frequency matched to cases on age at study visit, sex, race and studysite. Anti-CCP2 status, self-reported omega-3 FA supplement use and omega-3 FA % in RBCs wereobtained from a single visit.
Results.Anti-CCP2 positive cases were less likely than controls to report omega-3 FA supplement use(odds ratio: 0.14; 95% CI 0.03, 0.68). In addition, the likelihood of anti-CCP2 positivity was inverselyassociated with total omega-3 FA % in RBCs (odds ratio: 0.47; 95% CI 0.24, 0.92, for aS.D. increase).Conclusion.The inverse association between anti-CCP2 positivity and self-reported omega-3 FA supple-ment use and omega-3 FA % in RBCs suggests that omega-3 FAs may protect against the developmentof RA-related autoimmunity in pre-clinical RA.
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