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(American Journal of Pathology. 2002;161:1127-1133.)
© 2002 American Society for Investigative Pathology

Short Communication

Simian Virus 40 Sequences and Expression of the Viral Large T Antigen Oncoprotein in Human Pleomorphic Adenomas of Parotid Glands

Marcella Martinelli*¶, Fernanda Martini*¶, Eliana Rinaldi*, Laura Caramanico{dagger}, Eros Magri{dagger}, Enrico Grandi{dagger}, Francesco Carinci{ddagger}, Antonio Pastore§ and Mauro Tognon*¶

From the Department of Morphology and Embryology, Section of Histology and Embryology,* the Department of Experimental and Diagnostic Medicine, Section of Pathology,{dagger} the Chair of Maxillo-Facial Surgery,{ddagger} Head E.N.T. Clinic,§ the School of Medicine, and the Center of Biotechnology, University of Ferrara, Ferrara, Italy

Simian virus 40 (SV40) sequences of the early region coding for the large T antigen (Tag) oncoprotein were investigated in DNA samples from human pleomorphic adenoma (PA) of parotid glands. Specific SV40 sequences were detected, by PCR and filter hybridization with an internal oligoprobe, in 28 of 45 (62%) human PA specimens. None of the DNA samples from 11 normal salivary gland tissues was SV40-positive. DNA sequence analysis, carried out in all PCR amplified products from SV40-positive PA specimens, confirmed the SV40 specificity and indicated that PCR products had a sequence not distinguishable from SV40 DNA wild-type strain 776. SV40 Tag expression was revealed by immunohistochemistry with the specific monoclonal antibody Pab 101 in PA thin sections with a highly sensitive technical approach which retrieved the nuclear viral oncoprotein in 26 out of 28 (93%) samples previously found SV40-positive by PCR. Detection of SV40 sequences and Tag expression in human PA suggests that this oncogenic virus may play a role as a cofactor in the onset and/or progression of this benign neoplasm, or that SV40 DNA could replicate and express the Tag in PA cells.




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J. Virol., May 1, 2003; 77(9): 5039 - 5045.
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Copyright © 2002 by the American Society for Investigative Pathology.