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Bovine Leukemia Virus: A novel Zoonosis?

Research Project

Project/Area Number 17604006
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 食の安全
Research InstitutionNagasaki University

Principal Investigator

MORIUCHI Hiroyuki  Nagasaki University, Graduate School of Biomedical Sciences, Department of Molecular Microbiology and Immunology, Professor, 大学院医歯薬学総合研究科, 教授 (90315234)

Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2005: ¥2,400,000 (Direct Cost: ¥2,400,000)
KeywordsVirus / Veterinary medicine / Foods / Animals / Infectious diseases / 牛白血病ウイルス / プロウイルス / PCR / B細胞 / Western blot法 / 抗牛白血病ウイルス抗体
Research Abstract

Bovine leukemia virus (BLV) is closely related to human T-cell leukemia virus (HTLV), and considerable number of cattle have been shown to be infected with this virus; therefore, it is critical to clarify if human being can also be infected with this virus.
(1) Detection of BLV provirus DNA (pDNA)
BLV pDNA was amplified from peripheral blood mononuclear cells (PBMC) DNA with PCR and confirmed with Southern blotting (SB), or quantitated with real-time PCR. Although barely detectable BLV pDNA was found in a few samples, results of confirmatory experiments were inconsistent. Considering that proviral load might be around threshold level, we expanded peripheral blood B cells that are supposed to be BLV-targeting cells by transforming them with Epstein-Barr virus (EBV). Using large amount of DNA samples of EBV-transformed B cells derived from a healthy volunteer, we could amplified and sequenced several BLV genes such as tax, env and pol. Phylogenetic analysis of BLV env gene demonstrated the … More identified BLV pDNA was close to those in the USA and Australia and almost identical to those found in cows in Japan. However, amplification of more extended regions of BLV pDNA has been unsuccessful so far, partly because of difficulty in PCR and low copy number.
(2) Detection of anti-BLV antibody
BLV proteins were prepared from lysates of persistently BLV-infected cells or from cell-free culture supernatants of those cells. In addition, recombinant BLV Tax or Env protein was purified as fusion proteins with GST from E. coli cultures. Those BLV proteins were used as antigens for Western blotting (WB) to detect anti-BLV antibodies in human serum samples. Based on the diagnostic criteria for HTLV WB, one (9%) was positive and another (9%) was ambiguous among 11 healthy volunteers, and one (3%) was positive and three (9%) were ambiguous among 32 patients with breast cancer. However, the presence of BLV pDNA was not confirmed in BLV-seropositive individuals.
Discussion: Different from a recently reported study in the USA, there were not many BLV-seropositive individuals and the presence of anti-BLV antibody did not predict the presence of BLV pDNA in their peripheral blood B cells. Thus, BLV infection is probably rare, if any, in humans. Less

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (6 results)

All 2006

All Journal Article (6 results)

  • [Journal Article] Induction of Lactoferrin Gene Expression in Myeloid or Mammary Gland Cells by Human T-Cell Leukemia Virus Type 1 (HTLV-1) Tax : Implications for Milk-Borne Transmission of HTLV-1.2006

    • Author(s)
      Moriuchi M, Moriuchi H
    • Journal Title

      Journal of Virology 80

      Pages: 7118-7126

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 成人T細胞白血病.2006

    • Author(s)
      森内浩幸
    • Journal Title

      今日の小児治療指針 第14版

      Pages: 262-262

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] ヒトT細胞好性ウイルスI型(HTLV-I)感染症2006

    • Author(s)
      森内浩幸
    • Journal Title

      小児臨床検査ガイド(五十嵐隆・水口雅編)(文光堂)

      Pages: 437-440

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Induction of Lactoferrin Gene Expression in Myeloid or Mammary Gland Cells by Human T-Cell Leukemia Virus Type 1 (HTLV-1) Tax : Implications for Milk-Borne Transmission of HTLV-1.2006

    • Author(s)
      Moriuchi M, Moriuchi H.
    • Journal Title

      Journal of Virology 80

      Pages: 7118-7126

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Adult T cell leukemia.2006

    • Author(s)
      Moriuchi H.
    • Journal Title

      Current Therapeutic Guideline for Children 14^<th> edition. (in Japanese)

      Pages: 262-262

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Human T-lymphotropic virus type-I infection.2006

    • Author(s)
      Moriuchi H.
    • Journal Title

      Guideline for Pediatric Bedside Studies. (in Japanese)

      Pages: 437-440

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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