title: The effect of anti-CD40 ligand in immune thrombocytopenic purpura.
abstract: Immune thrombocytopenic purpura (ITP) is mediated by antiplatelet autoantibodies possibly involving CD40:CD40L co-stimulation. Two humanized anti-CD40L monoclonal antibodies, hu5c8 and IDEC-131, were evaluated in 46 patients with chronic refractory ITP. Fifteen patients were treated with 20 mg/kg of hu5c8: four (27%) had complete responses (CR) and two (13%) had partial responses (PR). Three responders to hu5c8 were successfully retreated with IDEC-131, demonstrating its efficacy. Thirty-one subsequent patients were treated with 5-20 mg/kg per infusion of IDEC-131: five (16%) responded (one CR and four PR). The 24% (11/46) overall response rate demonstrates the potential role of CD40-CD40L in the pathogenesis of ITP.
authors.affiliation: Division of Pediatric Hematology/Oncology, Weill Medical College of Cornell University, New York, NY, USA.
authors.forename: Vivek L
authors.initials: VL
authors.lastname: Patel
authors.forename: Joseph
authors.initials: J
authors.lastname: Schwartz
authors.forename: James B
authors.initials: JB
authors.lastname: Bussel
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal / Q000627:therapeutic use*; D061067:Antibodies, Monoclonal, Humanized; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D023201:CD40 Ligand / Q000276:immunology*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008213:Lymphocyte Activation / Q000276:immunology; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D010976:Platelet Count; D016553:Purpura, Thrombocytopenic, Idiopathic / Q000097:blood / Q000276:immunology / Q000628:therapy*; D016896:Treatment Outcome
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; C442103:hu5C8 antibody; D023201:CD40 Ligand; C470330:toralizumab