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Mary Zutter
Faculty Member
Last active: 4/26/2016

Expression of Epstein-Barr virus-encoded growth-transformation-associated proteins in lymphoproliferations of bone-marrow transplant recipients.

Gratama JW, Zutter MM, Minarovits J, Oosterveer MA, Thomas ED, Klein G, Ernberg I
Int J Cancer. 1991 47 (2): 188-92

PMID: 1846349 · DOI:10.1002/ijc.2910470205

The expression of Epstein-Barr virus (EBV)-encoded, growth-transformation-associated proteins was studied in lymphoproliferations of 9 allogeneic bone-marrow transplant (BMT) recipients. Immunoblots of cell lysates were probed with polyspecific and monospecific antisera directed against EBNA 1, 2, 3 and 6, and the membrane protein LMP. All tumors expressed EBNA 1 and LMP. EBNA 2 was detected in the tumors of 8 patients, and EBNA 3 and 6 in the tumors of 5 patients. The LMP regulatory sequences, 5' of the LMP gene, were totally unmethylated in all 7 cases, while the coding sequences of LMP and EBNA 2 were more methylated in CpG dinucleotides. EBV-transformed lymphoblastoid cell lines (LCL) express EBNA 1 to 6 and LMP; in contrast, Burkitt lymphomas express only EBNA 1. In vitro experiments have shown that EBNA 2, 3 and LMP can generate targets for cytotoxic T cells (CTL). These combined observations are consistent with the hypothesis that the EBV-associated lymphoproliferative disease of the BMT recipients escapes CTL-mediated rejection due to the failure of host immunosurveillance rather than to the down-regulation of immunogenic EBV-encoded antigens.

MeSH Terms (12)

Adolescent Adult Antigens, Viral Bone Marrow Transplantation Child DNA, Viral Epstein-Barr Virus Nuclear Antigens Herpesvirus 4, Human Humans Lymphoproliferative Disorders Methylation Viral Matrix Proteins

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