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Open Access Research

Chromosomal integration of an avian oncogenic herpesvirus reveals telomeric preferences and evidence for lymphoma clonality

Charmaine M Robinson1, Henry D Hunt2, Hans H Cheng2 and Mary E Delany1*

Author Affiliations

1 Department of Animal Science, University of California, Davis, CA 95616, USA

2 USDA-ARS Avian Disease and Oncology Laboratory, East Lansing, MI 48823, USA

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Herpesviridae 2010, 1:5  doi:10.1186/2042-4280-1-5

Published: 7 December 2010

Abstract

Background

Herpesviruses are a major health concern for numerous organisms, including humans, causing both acute and chronic infections recurrent over an individual's lifespan. Marek's disease virus (MDV) is a highly contagious herpesvirus which causes a neoplastic condition in chicken populations. Several vertebrate-infecting herpesviruses have been shown to exist in an integrated state during latent periods of infection. However the status of MDV during latency has been a topic of debate.

Results

Here we employed high-resolution multi-color fluorescence in situ hybridization (FISH) to show integration of MDV at the telomeres of chicken chromosomes. Cytogenomic mapping of the chromosomal integrations allowed us to examine the clonal relationships among lymphomas within individuals, whereas analysis of tumors from multiple individuals indicated the potential for chromosomal preferences.

Conclusions

Our data highlight that substantive genome-level interactions between the virus and host exist, and merit consideration for their potential impact and role in key aspects of herpesvirus pathobiology including infection, latency, cellular transformation, latency-breaks and viral evolution.