Iron metabolism in patients with rheumatoid arthritis

W. Tański, M. Chabowski, B. Jankowska-Polańska, E.A. Jankowska

Department of Internal Medicine, 4th Military Teaching Hospital, Wrocław, Poland. mariusz.chabowski@gmail.com

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• Rheumatology

OBJECTIVE: Anemia is the hematological issue that occurs most often as a manifestation in RA. The aim of the study was to assess iron deficiency in RA patients.

PATIENTS AND METHODS: The study was carried out on 62 RA patients treated between 2016 and 2017.

RESULTS: A higher percentage of RA patients compared to the control group had TSAT below 20% (43% vs. 5%), ferritin below the reference range (15% vs. 7%), sTfR above 1.59 mg/l (26% vs. 0%) and hepcidin below 14.5 ng/ml (56% vs. 2%). 60% of RA patients had iron deficiency, and 18% – anemia. Correlations were found between reduced levels of ferritin and patients being younger, female, with lower GGT and higher platelet counts. Correlations were also found between iron deficiency and patients being younger, female, having reduced hemoglobin, increased platelet counts, increased GFR, reduced GGT, lower disease activity, and less frequent use of sulfasalazine.

CONCLUSIONS: Iron deficiency is common (64%) in RA patients where there is high disease activity. RA patients had lower transferrin, lower ferritin, lower hepcidin, and higher sTfR. Decreased DAS-28 and reduced hemoglobin were the strongest determinants of iron deficiency.

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