Article (Scientific journals)
Analysis of Nucleotide Sequence of Tax, miRNA and LTR of Bovine Leukemia Virus in Cattle with Different Levels of Persistent Lymphocytosis in Russia
Pluta, Aneta; Blazhko, Natalia V.; Ngirande, Charity et al.
2021In Pathogens, 10, p. 246
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Keywords :
bovine leukemia virus (BLV); long terminal repeat (LTR); Tax protein; miRNA; persistent lymphocytosis; proviral load; sequence variants; primary isolates
Abstract :
[en] Bovine Leukemia Virus (BLV) is the etiological agent of enzootic bovine leucosis (EBL), a lymphoproliferative disease of the bovine species. In BLV-infected cells, the long terminal repeat (LTR), the viral Tax protein and viral miRNAs promote viral and cell proliferation as well as tumorigenesis. Although their respective roles are decisive in BLV biology, little is known about the genetic sequence variation of these parts of the BLV genome and their impact on disease outcome. Therefore, the objective of this study was to assess the relationship between disease progression and sequence variation of the BLV Tax, miRNA and LTR regions in infected animals displaying either low or high levels of persistent lymphocytosis (PL). A statistically significant association was observed between the A(+187)C polymorphism in the downstream activator sequence (DAS) region in LTR (p-value = 0.00737) and high lymphocytosis. Our study also showed that the mutation (−4)G in the CAP site occurred in 70% of isolates with low PL and was not found in the high PL group. Conversely, the mutations G(−133)A/C in CRE2 (46.7%), C(+160)T in DAS (30%) and A(310)del in BLV-mir-B4-5p, A(357)G in BLV-mir-B4-3p, A(462)G in BLV-mir-B5-5p, and GA(497–498)AG in BLV-mir-B5-3p (26.5%) were often seen in isolates with high PL and did not occur in the low PL group. In conclusion, we found several significant polymorphisms among BLV genomic sequences in Russia that would explain a progression towards higher or lower lymphoproliferation. The data presented in this article enabled the classification between two different genotypes; however, clear association between genotypes and the PL development was not found.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Pluta, Aneta
Blazhko, Natalia V.
Ngirande, Charity
Joris, Thomas ;  Université de Liège - ULiège > GIGA Cancer - Cellular and Molecular Epigenetics
Willems, Luc  ;  Université de Liège - ULiège > GIGA Cancer - Cellular and Molecular Epigenetics
Kuźmak, Jacek
Language :
English
Title :
Analysis of Nucleotide Sequence of Tax, miRNA and LTR of Bovine Leukemia Virus in Cattle with Different Levels of Persistent Lymphocytosis in Russia
Publication date :
20 February 2021
Journal title :
Pathogens
eISSN :
2076-0817
Publisher :
Molecular Diversity Preservation International (MDPI), Basel, Switzerland
Volume :
10
Pages :
246
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Fund for Scientific Research at the National Veterinary Research Institute, Puławy, Poland.
Available on ORBi :
since 25 May 2021

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