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PMID: 12665622
Published · ppublish
English
Case Reports
Journal Article
Research Support, Non-U.S. Gov't
Epstein-Barr virus-infected B cells expanding in germinal centers of infectious mononucleosis patients do not participate in the germinal center reaction.
Proceedings of the National Academy of Sciences of the United States of America
·Vol. 100
·No. 8
·2003-04-15
·Pages 4730-5
Abstract
To assess the impact of the germinal center (GC) reaction on viral spread in Epstein-Barr virus (EBV) infection, we isolated EBV(+) GC B cells from the tonsils of two infectious mononucleosis patients, sequenced their rearranged V genes, and determined expression of the EBV latency genes EBV nuclear antigen 2 and latent membrane protein 1. Most EBV(+) GC B cells belonged to clones of cells harboring somatically mutated V gene rearrangements. Ongoing somatic hypermutation, the hallmark of the GC reaction, was seen only in uninfected GC B cell clones, not in EBV(+) B cell clones. Thus, in infectious mononucleosis, GC and/or memory B cells are directly infected by EBV and expand without somatic hypermutation, whereas the GC passage of EBV-infected naive B cells does not contribute detectably to the generation of infected memory B cells, the main reservoir of EBV during persistence. Most, if not all, EBV-infected cells in GCs exhibited an unusual EBV gene expression pattern in that they were positive for EBV nuclear antigen 2 but negative for latent membrane protein 1. Although the three main types of EBV-associated B cell lymphomas (Burkitt's, Hodgkin's, and posttransplant lymphomas) presumably are derived from GC B cells, EBV(+) GC B cells resembling these EBV(+) GC B cell lymphomas in terms of EBV gene expression and somatic hypermutation pattern could not be identified.
MeSH Terms
Adolescent
Adult
B-Lymphocytes/immunology,pathology,virology
Base Sequence
DNA, Viral/genetics,isolation & purification
Gene Expression
Genes, Viral
Germinal Center/immunology,pathology,virology
Herpesvirus 4, Human/genetics,immunology,pathogenicity
Humans
Infectious Mononucleosis/immunology,pathology,virology
Lymphoma, B-Cell/etiology
Male
Molecular Sequence Data
Chemicals
DNA, Viral
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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
Published
2003-04-15
Epub
2003-00-28
Pages
4730-5
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC153624
Subset
IM
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