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Blood, 1 February 2005, Vol. 105, No. 3, pp. 994-996. Prepublished online as a Blood First Edition Paper on October 19, 2004; DOI 10.1182/blood-2004-07-2965.
CLINICAL OBSERVATIONS, INTERVENTIONS, AND THERAPEUTIC TRIALS Treatment of primary Epstein-Barr virus infection in patients with X-linked lymphoproliferative disease using B-celldirected therapyFrom the Department of Pathology and Laboratory Medicine and the Hematologic Malignancies Program, University of Pennsylvania; the Clinical Virology Laboratory and the Department of Pediatric Oncology, Children's Hospital of Philadelphia; the Departments of Pediatrics and Pathology, University of Pennsylvania School of Medicine, Philadelphia, PA; the Department of Pediatric Oncology, Dana-Farber Cancer Institute; the Department of Pediatric Hematology-Oncology, Children's Hospital, Boston MA; and the Department of Allergy and Immunology, Hospital Britanico, Buenos Aires, Argentina.
X-linked lymphoproliferative disease (XLP) is a congenital immunodeficiency that is characterized by an abnormal immune response to primary Epstein-Barr virus (EBV) infection. After EBV exposure, affected patients often develop fulminant infectious mononucleosis (FIM), a life-threatening condition marked by the uncontrolled expansion and activation of T and B lymphocytes and macrophages. We hypothesized that the rapid elimination of B cells immediately following EBV exposure might reduce the severity of primary EBV infection in patients with XLP. To test this possibility, we administered the anti-CD20 antibody rituximab to 2 patients who presented with acute infection. Following treatment, both patients exhibited a complete resolution of symptoms and no longer demonstrated detectable EBV DNA within circulating lymphocytes. Moreover, neither patient has developed FIM or lymphoma in more than 2 years of follow-up. These data suggest that the pre-emptive use of B-celldirected therapy may reduce the morbidity and mortality of primary EBV infection in XLP-affected individuals.
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