Genetic heterogeneity among bovine leukemia viruses in Japan and their relationship to leukemogenicity

Genetic heterogeneity among bovine leukemia viruses in Japan and their relationship to... Bovine leukemia virus (BLV) infection in cattle causes persistent lymphocytosis, and a few percent of infected animals develop lymphoid tumors, namely enzootic bovine leukosis (EBL). In this study, a 440-bp fragment of the env gene was amplified from 204 tumor samples collected from different regions of Japan and analyzed by restriction fragment length polymorphism (RFLP) to determine the association of BLV with EBL. Of the seven RFLP types defined, types I, II, and III were dominant and found in 12.7, 75.0, and 8.3% of tumor samples, respectively. Cattle harboring type III virus were significantly older than other animals at the time of diagnosis of EBL. Type III viruses were found in approximately 33% and 5.5% of Japanese Black and Holstein cattle, respectively, with EBL. These findings indicate that genetically distinct BLV was associated with EBL in Japan and that the genetic profile may influence the leukemogenicity of the virus. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

Genetic heterogeneity among bovine leukemia viruses in Japan and their relationship to leukemogenicity

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Publisher
Springer Vienna
Copyright
Copyright © 2011 by Springer-Verlag
Subject
Biomedicine; Medical Microbiology ; Infectious Diseases; Virology
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s00705-011-0955-6
Publisher site
See Article on Publisher Site

Abstract

Bovine leukemia virus (BLV) infection in cattle causes persistent lymphocytosis, and a few percent of infected animals develop lymphoid tumors, namely enzootic bovine leukosis (EBL). In this study, a 440-bp fragment of the env gene was amplified from 204 tumor samples collected from different regions of Japan and analyzed by restriction fragment length polymorphism (RFLP) to determine the association of BLV with EBL. Of the seven RFLP types defined, types I, II, and III were dominant and found in 12.7, 75.0, and 8.3% of tumor samples, respectively. Cattle harboring type III virus were significantly older than other animals at the time of diagnosis of EBL. Type III viruses were found in approximately 33% and 5.5% of Japanese Black and Holstein cattle, respectively, with EBL. These findings indicate that genetically distinct BLV was associated with EBL in Japan and that the genetic profile may influence the leukemogenicity of the virus.

Journal

Archives of VirologySpringer Journals

Published: Jul 1, 2011

References

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