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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Cannon, M. J. Hobbs, M. V. Garnier, J. L. Rochford, R. Cooper, N. R. |
| Description | Author Affiliation: Rochford R ( Department of Immunology, Scripps Research Institute, La Jolla, CA 92037.); |
| Abstract | The Epstein-Barr virus (EBV)-associated B-cell lymphoproliferative disorders that arise in immunosuppressed individuals are considered to resemble EBV-transformed in vitro lymphoblastoid cell lines (LCLs) with a mature activated B-cell phenotype. In this study of human lymphoproliferative disorders in the severe combined immunodeficiency mouse model, however, we demonstrate that EBV-infected tumor cells are not LCL-like but are predominantly plasmacytoid and that this phenotype correlates with reduced expression of EBV latent genes. B-cell tumors developed within 3-6 weeks after injection of LCLs into severe combined immunodeficiency mice. The tumors and the injected LCLs were analyzed by flow cytofluorometry for B-cell differentiation and activation markers and by ribonuclease protection assay for cellular and viral gene expression. No differences in the expression of CD19 and CD21 were observed. However, a decrease in CD23, CD11a (lymphocyte function-associated antigen LFA-1), and CD58 (LFA-3) expression and an increase in CD38 (a plasma-cell-associated antigen), CD54 (intracellular adhesion molecule ICAM-1), and HLA class I in the tumor cells relative to the LCLs was observed. Two-color flow cytofluorometric analysis showed that the predominant population (> 80%) in LCLs was CD23hi/CD38lo and that the major population in LCL-derived tumors was CD23lo/CD38hi. Cell cycle analysis showed that, in contrast to actively cycling LCLs, the majority of tumor cells had exited the cell cycle and were restricted to G0/G1 phase. Finally, and most important, a reduction in mRNA for the EBV latent genes EBV nuclear antigen 2 (EBNA2) and latent membrane protein (LMP1) was observed in the tumors. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 1 |
| Volume Number | 90 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1993-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Antigens, CD B-Lymphocytes Cytology Physiology Cell Differentiation Genes, Viral Herpesvirus 4, Human Genetics Animals Antibodies, Monoclonal Antigens, Viral Cell Cycle Cells, Cultured DNA-Binding Proteins Epstein-Barr Virus Nuclear Antigens Flow Cytometry Gene Expression Genetic Vectors Immunology Mice Mice, SCID Polymerase Chain Reaction Ribosomal Proteins Tumor Cells, Cultured Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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