Provirus variants of bovine leukemia virus in naturally infected cattle from Argentina and Japan
文献类型: 外文期刊
第一作者: Licursi, M
作者: Licursi, M;Inoshima, Y;Wu, DL;Yokoyama, T;Gonzalez, ET;Sentsui, H
作者机构:
关键词: bovine leukemia virus (BLV);phylogenetic tree;provirus;sequencing;variants
期刊名称:VETERINARY MICROBIOLOGY ( 影响因子:3.293; 五年影响因子:3.599 )
ISSN: 0378-1135
年卷期: 2003 年 96 卷 1 期
页码:
收录情况: SCI
摘要: A serologic subgroup of bovine leukemia virus (BLV) has not been identified, whereas genetic diversity among BLVs has been reported by polymerase chain reaction (PUR)-restriction fragment length polymorphism (RFLP). To investigate the distribution of BLV provirus variants, 42 isolates from Argentina and Japan were examined by nested PCR for a segment of the env gene, followed by DNA sequencing. The nucleotide sequences were compared with other previously characterized BLV variants from different geographical areas (Belgium, France, Italy, North America, Australia, Japan and Argentina). The majority of analyzed segments had a tendency for nucleotide substitution without changing the amino acid. The constructed phylogenetic tree showed the relations and differences between proviruses and within each one. Most of the samples in Argentina formed one cluster. The samples in Japan, except one, also formed one cluster and some of them showed high homology with the isolates from Australia and the USA. Considering the sequence analysis of env PCR products of all Japanese and Argentine samples and comparing them with the other previously isolated sequences, the variation was up to 3.5% and was characterized geographically in each area. (C) 2003 Elsevier B.V. All rights reserved.
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