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Case series demonstrates clinical remission after obinutuzumab in refractory membranous nephropathy, suggesting a salvage therapy option.
Obinutuzumab is a glycoengineered type II anti-CD20 monoclonal antibody with superior B cell cytotoxicity compared to rituximab. Various case reports suggest that in refractory phospholipase A2 receptor (PLA2R) positive membranous nephropathy (MN) patients, Obinutuzumab led to immunologic remission and improvement in proteinuria. In the present case series, we present six cases of difficult-to-treat PLA2R-associated MN refractory to prednisolone, calcineurin inhibitor (CNI), cyclophosphamide, and rituximab but subsequently responded to Obinutuzumab. Five out of six cases showed partial /complete clinical remission and immunological remission (IR) with normalization of serum albumin and stable renal function. Though this drug's long-term efficacy and impact remain unclear, it is being increasingly considered for PLA2R-associated MN resistant to standard therapy.
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Jha et al. (2024) studied this question.
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