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Consequences of B-cell-depleting therapy: hypogammaglobulinemia and impaired B-cell reconstitution

    Keith A Sacco

    Department of Medicine, Mayo Clinic, Jacksonville, FL 32224, USA

    &
    Roshini S Abraham

    *Author for correspondence: Tel.: +1 507 266 9292; Fax: +1 507 266 4088;

    E-mail Address: Abraham.Roshini@mayo.edu

    Department of Laboratory Medicine & Pathology & Medicine, Mayo Clinic, Rochester, MN 55905, USA

    Published Online:https://doi.org/10.2217/imt-2017-0178

    Rituximab is a chimeric monoclonal antibody used to treat hematologic and autoimmune diseases by depleting CD20-expressing B cells. Patients may develop hypogammaglobulinemia following treatment, with some demonstrating failure of B-cell recovery. The true frequency of hypogammaglobulinemia and/or impaired B-cell reconstitution post rituximab is unknown due to the lack of prospective studies in different patient cohorts. The clinical significance remains controversial; some patients have recurrent infections while others are relatively asymptomatic. The aim of this review is to describe the prevalence of hypogammaglobulinemia and the associated risk for developing severe infection, in patients with differing underlying clinical conditions treated with rituximab. This may facilitate classification and prognostication of patients who develop these conditions and identify patients who may be at high risk of developing these complications, including those who may benefit from immunoglobulin replacement therapy.

    Papers of special note have been highlighted as: • of interest; •• of considerable interest

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