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Journal of Virology, October 2002, p. 9645-9656, Vol. 76, No. 19
0022-538X/02/$04.00+0     DOI: 10.1128/JVI.76.19.9645-9656.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Identification of Epstein-Barr Virus Strain Variants in Hairy Leukoplakia and Peripheral Blood by Use of a Heteroduplex Tracking Assay

Diane Sitki-Green,1,2 Rachel H. Edwards,1 Jennifer Webster-Cyriaque,2,3 and Nancy Raab-Traub1,3*

Lineberger Comprehensive Cancer Center,1 School of Dentistry,2 Department of Microbiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina3

Received 30 April 2002/ Accepted 18 June 2002

Epstein-Barr virus (EBV) strains can be distinguished by specific sequence variations in the LMP1 gene. In this study, a heteroduplex tracking assay (HTA) specific for LMP1 was developed to precisely identify the prototypic undeleted strain B958, other undeleted strains (Ch2, AL, NC, and Med-), and strains with the 30-bp deletion (Med+ and Ch1). This technique also provides an estimate of the relative abundance of strains in patient samples. In this study, EBV strains were identified in 25 hairy leukoplakia (HLP) biopsies and six matched peripheral blood samples and throat washes with the LMP1-HTA. To investigate the relationship of the virus found in the peripheral blood to that in the HLP lesion, the strain variants in the peripheral blood B lymphocytes and those present within the epithelial cells in the HLP lesion and in throat washes were identified. In many of the subjects, compartmental differences in the EBV strain profiles in the oral cavity and peripheral blood were readily apparent. The throat wash specimens usually had a strain profile similar to that within the corresponding HLP sample, which was distinct from the strain profile detected in the peripheral blood. These analyses reveal that the nature of EBV infection can be very dynamic, with changes in relative strain abundance over time as well as the appearance of new strains. The patterns of abundance in the blood and oral cavity provide evidence for compartmentalization and for the transmission of strains between the blood and oropharynx.

* Corresponding author. Mailing address: CB# 7295, Lineberger Comprehensive Cancer Center, University of North Carolina—Chapel Hill, Chapel Hill, NC 27599. Phone: (919) 966-1701. Fax: (919) 966-9673. E-mail: nrt{at}med.unc.edu.

Journal of Virology, October 2002, p. 9645-9656, Vol. 76, No. 19
0022-538X/02/$04.00+0     DOI: 10.1128/JVI.76.19.9645-9656.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



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