Genetic heterogeneity among bovine leukemia virus genotypes and its relation to humoral responses in hosts
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;cattle;genotypes;provirus;RFLP
期刊名称:VIRUS RESEARCH ( 影响因子:3.303; 五年影响因子:3.445 )
ISSN: 0168-1702
年卷期: 2002 年 86 卷 1-2 期
页码:
收录情况: SCI
摘要: The existence of bovine leukemia virus (BLV) genotypes was investigated by restriction fragment length polymorphism (RFLP) analysis using bovine peripheral blood leukocytes collected from different geographical areas of Japan. For this purpose a nested polymerase chain reaction (PCR) for a 444 bp fragment of the envelope (env) gene was used because it was previously reported that this region might be responsible for the serological status in the host. The PCR products from 60 samples of BLV-infected cells were digested with endonucleases BamH I, Bgl I, Bcl I, Hae III and Pvu II. RFLP analysis demonstrated that there were six different genotypes of BLV present among cattle in Japan, In sonic herds PCR-positive animals were infected with only one genotype. but in other herds a few genotypes were found. One genotype was dominant throughout infected cattle and it was also detected in neoplastic cells from three of four animals with lymphosarcoma and three cell lines persistently infected with BLV, Production of antibodies to BLV in each cattle was surveyed by agar get immunodiffusion and indirect hemagglutination tests, and the results were compared with those obtained from PCR. No genotype related to decreased immunoreactivity was detected. The difference in anti-viral immune responses of each animal appears to be related to the infection stage and other host factors, not to genetic heterogeneity of the envelope gene. (C) 2002 Elsevier Science B.V. All rights reserved.
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