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Higher vitamin D, omega-3 FA intakes linked to better treatment results in early RA

08 Jul 2017

Higher intake of dietary vitamin D and omega-3 fatty acids (FA) may potentially boost the treatment effect of disease-modifying antirheumatic drugs (DMARDs) in patients with early rheumatoid arthritis (RA), according to a prospective study.

The investigators looked at 727 early RA patients (mean age 52.5 years; 72.6 percent female) enrolled in the Epidemiological Investigation of Rheumatoid Arthritis (EIRA) study and found that treatment was initiated with methotrexate (MTX) in majority (89.9 percent) of patients. More than half (56.9 percent) of the patients combined DMARDs with glucocorticoids.

On logistic regression analysis, the highest quartile of intakes of vitamin D and omega-3 FA (as measured using the food frequency questionnaire) were associated with good European League Against Rheumatism (EULAR) response after 3 months of DMARD treatment.

The adjusted odds ratio [aOR] for EULAR response was 1.61 (95 percent CI, 1.01 to 2.57) in patients with vitamin D intake of >6.97 vs ≤4.25 µg/day (p=0.048) and 1.68 (1.05 to 2.68; p=0.030) in patients with omega-3 FA intake of >0.84 vs ≤0.45 g/day (p=0.030). A similar pattern of results was observed in a subgroup of patients who were initially treated with MTX monotherapy at baseline.

On the other hand, no significant association was observed between dietary folate intake and EULAR response.

“These results, if confirmed, suggest that dietary interventions may be of interest in the management of RA, not only for reasons of optimising general health but also for achieving optimal results with antirheumatic medications,” researchers said.

Previous studies have reported an association between vitamin D deficiency and an increased risk of RA, with evidence suggesting that the deficiency can trigger autoimmune responses and therefore may provide an immunoregulatory effect. Meanwhile, omega-3 FA has been shown to have anti-inflammatory properties and reduce disease activity in RA. [Clin Rheumatol 2012;31:1733–9; Autoimmun Rev 2011;11:84–7; Arthritis Res Ther 2009;11:218]

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Most Read Articles
Roshini Claire Anthony, 4 days ago

The combined use of piperacillin and tazobactam does not appear to be a suitable alternative to meropenem for patients with bloodstream infections caused by ceftriaxone-resistant Escherichia coli (E. coli) or Klebsiella pneumoniae (K. pneumoniae), according to results of the MERINO* trial.

Tristan Manalac, 19 May 2018
Taking oral antibiotics appears to increase the risk of nephrolithiasis, according to a recent study. Moreover, the risk seems to be compounded for individuals with recent antibiotic exposure and those who were exposed at a younger age.
2 days ago
Patients with inflammatory bowel disease are at increased risk of developing acute myocardial infarction (AMI) or heart failure, although the prevalence of traditional risk factors for such cardiovascular disorders appears to be low, as reported in a recent study.
3 days ago
Early renin-angiotensin-aldosterone system (RAAS) blockade with renin-angiotensin system inhibitors (RASI) leads to better short- and long-term renal outcomes in systemic lupus erythematosus (SLE) patients with antiphospholipid-associated nephropathy (aPLN), according to a study, adding that this renal protective effect is independent of RASI’s antihypertensive and antiproteinuric effects.