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Journal of Virology, January 2003, p. 1595-1597, Vol. 77, No. 2
0022-538X/03/$08.00+0 DOI: 10.1128/JVI.77.2.1595-1597.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.
Divisions of Experimental Oncology,1 Pathology, Centro di Riferimento Oncologico, IRCCS, 33081 Aviano (Pordenone),3 Department of Morphology and Embryology, Section of Histology and Embryology,2 Center of Biotechnology, University of Ferrara, 44100 Ferrara, Italy4
Received 19 July 2002/ Accepted 17 October 2002
Human Epstein-Barr virus-immortalized lymphoblastoid B-cell lines tested positive by PCR for simian virus 40 (SV40) DNA (22 of 42 cell lines, 52.3%). B lymphocytes or tissues from which B-cell lines derived were also SV40 positive. In situ hybridization showed that SV40 DNA was present in the nucleus of a small fraction (1/250) of cells. SV40 T-antigen mRNA was detected by reverse transcription-PCR. Lymphoblastoid B-cell lines (n = 4) infected with SV40 remained SV40 positive for 4 to 6 months. SV40-positive B-cell lines were more tumorigenic in SCID mice than were SV40-negative cell lines (4 of 5 [80%] SV40-positive cell lines versus 2 of 4 [50%] SV40-negative cell lines). These results suggest that SV40 may play a role in the early phases of human lymphomagenesis.
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