Abstract
Bovine leukemia virus (BLV) is a member of the family Retroviridae that causes enzootic bovine leukemia (EBL). However, the association between BLV infection and EBL development remains unclear. In this study, we identified a BLV/SMAD3 chimeric provirus within CC2D2A intron 30 in monoclonal expanded malignant cells from a cow with EBL. The chimeric provirus harbored a spliced SMAD3 sequence composed of exons 3–9, encoding the short isoform protein, and the BLV-SMAD3 chimeric transcript was detectable in cattle with EBL. This is the first report of a BLV chimeric provirus that might be involved in EBL tumorigenesis.
Data availability
The complete sequence of the BLV/SMAD3 chimeric provirus in EBL091 has been deposited in the GenBank database under the accession number LC728442.
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Acknowledgments
We thank Susan Furness, PhD, from Edanz (https://jp.edanz.com/ac) for editing a draft of this manuscript.
Funding
This study was supported by the Grants-in-Aid for Scientific Research (project numbers 17H03594 to MS, 19KK0172, 22H02503, and 22K19232 to SK, and 19K15993 and 22K15005 to TO); grants from the Ito Memorial Foundation (to SK); the Science and Technology Research Promotion Program for Agriculture, Forestry, Fisheries, and Food Industry, Japan (number 26058B; to SK); the NARO Bio-oriented Technology Research Advancement Institution (the special scheme project on developing regional strategy; grant 16817557 to SK); Clinical Research Promotion Fund by the Hokkaido University Veterinary Teaching Hospital (to SK); World-leading Innovative and Smart Education Program 1801 from the Ministry of Education, Culture, Sports, Science and Technology (to NN); Ministry of Health, Labour and Welfare (MHLW) under grant 23HA2010 (to NN); the Japan Agency for Medical Research and Development (AMED) SCARDA Hokkaido University Institute for Vaccine Research and Development (HU-IVReD) (to NN), and the Japan Program for Infectious Diseases Research and Infrastructure (JP22wm0125008) from AMED (to NN). The funders had no role in the study design, data collection, interpretation, or decision to submit the paper for publication.
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T.O., N.No, H.S., T.M., S.Y., M.T., H.Y.F., E.N., N.M., S.M., and M.S performed the research; N.Na performed the data analysis; N.Na., T.S., T.O., S.K., M.M., K.O., and M.S. wrote the manuscript; and K.S., T.M., M.M., K.O., and M.S. supervised the study.
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The animal experiments were approved by the Ethics Committee of the Faculty of Veterinary Medicine, Hokkaido University (approval #17–0024). Verbal informed consent was obtained from the owners for the use of their animals in this study.
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MS and TM have a patent pending for the materials and techniques described in this paper (application number PCT/JP2020/30907). The other authors declare no competing interests.
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Communicated by YiMing Shao
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Nao, N., Okagawa, T., Nojiri, N. et al. Chimeric provirus of bovine leukemia virus/SMAD family member 3 in cattle with enzootic bovine leukosis. Arch Virol 169, 47 (2024). https://doi.org/10.1007/s00705-024-05970-3
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DOI: https://doi.org/10.1007/s00705-024-05970-3