Study Assessing an Algorithm-based Strategy of Eculizumab Discontinuation in Children and Adults With aHUS

Atypical hemolytic syndrome (aHUS) is a severe renal disease affecting children and adults. It is characterized by the occlusion of intrarenal vessels due to the presence of platelet/fibrin thrombi, and leads to end-stage renal disease in up to 2/3 of patients. The discovery of complement alternative pathway as a major risk factor for aHUS has led to the design of a disease-specific treatment, the anti-C5 monoclonal antibody, eculizumab. Complement inhibition using eculizumab has clearly improved the renal outcome of aHUS patients with a dramatic decrease in the risk of end-stage renal disease. However, the optimal duration of eculizumab therapy is still debated. The present study aims to assess the feasibility and safety of the discontinuation of eculizumab treatment in children and adults with aHUS.