Immunoglobulin a Antibody to Epstein-Barr Viral Antigens and Prognosis in Nasopharyngeal Carcinoma

Author:

Mathew Gregory D.1,Qualtiere Louis F.2,Neel H. Bryan1,Pearson Gary R.2

Affiliation:

1. Departments of otorhinolaryngology, Mayo Clinic and Mayo Foundation, Rochester, Minnesota

2. Departments of cell biology, Mayo Clinic and Mayo Foundation, Rochester, Minnesota

Abstract

IgA immunoglobulin fractions containing antibodies to Epstein-Barr virus (EBV)-induced membrane antigens were isolated from the sera of two patients with nasopharyngeal carcinoma (NPC), from one non-NPC patient, and from three persons with sera negative for IgA antibodies. IgA antibodies were not cytotoxic against cells expressing EBV-induced membrane antigens in the antibody-dependent cellular cytotoxicity (ADCC) assay. However, IgA antibodies blocked IgG-mediated ADCC, which indicated that these antibodies could serve as a blocking “factor” in patients with disease and, therefore, were potentially detrimental to the host.

Publisher

SAGE Publications

Subject

Otorhinolaryngology,Surgery

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