Successful therapeutic response with sequential therapy of rituximab and belimumab in a hispanic patient with refractory lupus nephritis

Abstract

Lupus nephritis (LN) is the most common severe organ manifestation of systemic lupus erythematosus (SLE). Life expectancy and renal survival is reduced in these patients. A partial remission in LN is associated with a significantly better patient and renal survival rate compared with no remission. We report the case of a 27-year-old Hispanic patient with diffuse proliferative lupus nephritis (grade IV with high activity index) managed with induction therapy with mycophenolate mophethyl (MMF, 1000 mg daily escalating to 3000 mg daily and prednisone (PDN) 1 mg/kg/day. Progression of proteinuria with preserved renal function and extra-renal activity were observed (alopecia). Re-induction with IV cyclophosphamide (CYC, 1 gr.) and pulse IV methylprednisolone (500 mg for three days) was administered, followed by a lower starting dose of PDN (0.5 mg/kg/day). Treatment failure was observed. A second renal biopsy evidenced renal damage (chronicity index 4/12 and activity index 4/24). The patient also developed non-renal clinical manifestations (malar rash, oral ulcers and arthritis). Treatment with IV rituximab (RTX) 1000 mg X2 associated with MMF 1000 mg per day and IV methylprednisolone 500 mg X3 was initiated, followed by PDN 0.5 mg/kg/day with a dose-tapering scheme similar to CYC re-induction. Treatment continued with IV Belimumab (BLM) 600 mg every month associated with MMF 1000 mg per day. Sequential therapy with RTX + BLM showed a partial renal and complete extra-renal response in a patient with severe lupus despite two 2 immunosuppressive treatment schemes.