Immunoadsorption for heart failure is associated with normalization of iron metabolism

Abstract

Aims In heart failure (HF) patients, early stages are associated with increased iron levels, whereas iron deficiency is a common feature of chronic HF. We investigated the acute and long-term changes in iron metabolism in HF patients after immunoadsorption treatment and intravenous immunoglobulin (IVIG) administration. Methods and results Twenty-seven patients with HF with reduced ejection fraction (HFrEF) received a single cycle of immunoadsorption followed by IVIG administration. Left ventricular ejection fraction (LVEF) and iron biomarker (ferritin, hepcidin and interleukin-6) were evaluated at baseline, after immunoadsorption and during long-term follow-up of 29.3 months. LVEF improved significantly after immunoadsorption treatment from baseline 27% to 43% at long-term follow-up. Ferritin decreased from baseline 300.2 to 201.3 ng/mL (p < 0.0001) during immunoadsorption treatment and normalized during long-term to 207.9 ng/mL. Hepcidin showed a V-shaped course, with a significant decrease after immunoadsorption and normalization during long-term. Interleukin-6 levels showed no relevant inflammation. Conclusions Our data suggest that initial high serum ferritin and hepcidin levels indicate elevated iron levels characteristic of early stages of HFrEF, without inflammation. Normalization of hepcidin and ferritin was paralleled by restoration of systolic cardiac function after immunoadsorption treatment, without development of iron deficiency, as usually observed in chronic HF.