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Comparative genomics of staphylococcal enterotoxin gene family

Research Project

Project/Area Number 18580304
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied veterinary science
Research InstitutionIwate University

Principal Investigator

OMOE Katsuhiko  Iwate University, Faculty of Agriculture, Associate Professor (60224309)

Co-Investigator(Kenkyū-buntansha) SHINAGAWA Kunihiro  Faculty of Agriculture, 農学部, Professor (60133906)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,730,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2006: ¥2,300,000 (Direct Cost: ¥2,300,000)
KeywordsS. aureus / Staphylococcal enterotoxin / recombinant DNA / genome biology / diagnosis / pathogenicity islands / S. aureus / Staphylcoccal enterotoxin
Research Abstract

In recent years, many new staphylococcal enterotoxins (SEs) have been reported. It has been known that certain SE genes are associated with mobile genetic elements such as pathogenicity islands, prophages, and plasmids. These facts imply that superantigenic toxin genes are transferred horizontally between staphylococcal strains. There is a possibility that these mobile genetic elements have played an important role in the evolution of S. aureus as a pathogen. To investigate pathobiology and epidemiology of these newly identified Ses, we had undertaken studies shown in below.
1. To detect and characterize unknown SE gene encoding pathogenicity islands, we have developed a new method, named pathogenicity islands scanning. Based on full genome sequences of several S. aureus, we designed PCR primers to amplify entire region of pathogenicity islands. Amplicons were subjected to restriction fragments length polymorphism (RFLP) analysis. Using pathogenicity islands scanning/RFLP, We have found … More that SEB-related pathogenicity islands are classified into at least 5 groups. Also, we have determined complete nucleotide sequence of selj/selr encoding plasmid pF5 using shotgun sequencing strategy. This plasmid is encoding two novel enterotoxin gene, ses and set, in addition to selj and selr. In addition, we developed several diagnostic methods including immuno-PCR sensitive detection of SEs, cultivation/PCR of sensitive detection of S. aureus, and multiplex PCR for comprehensive detection of SE/SE1 genes.
2. We characterized two novel staphylococcal entertoxins SES and SET. Recombinant (r)SES specifically stimulated human T cells in T cell receptor (TCR) Vβ9-specific manner in the presence of MHC class II^+ antigen presenting cells (APCs). rSET also stimulated T cells in the presence of MHC class II^+ APC, although its Vβ skewing was not found in reactive T cells. Subsequently, we examined the emetic activity of SES and SET. We also studied SEIR to determine emetic activity in primates. This toxin was identified in previous studies but not examined in terms of possessing emetic activity for primates. rSES induced emetic reactions in 2 of 4 monkeys at a dose of 100 μg/kg within 5 hours of intragastric administration. In one monkey, rSET induced a delayed reaction (24 hours post-administration) at a dose of 100 μg/kg and in the other one, reaction occurred 5 days post-administration. Also, we investigated a mechanism of SEA-induced emesis using a small emetic animal model, House musk shrew (Suncus murinus). SEA induces serotonin (5-hydroxytryptamine, 5-HT) release in intestine, and that the 5-HT3 receptor on vagal afferent neurons are essential for SEA induced emesis. Less

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (19 results)

All 2008 2007 2006 Other

All Journal Article (18 results) (of which Peer Reviewed: 7 results) Presentation (1 results)

  • [Journal Article] Comparative prevalence of superantigenic toxin genes in methicillin-resistant and methicillin-susceptible Staphylococcus aureus isolates2008

    • Author(s)
      Hu D.-L. , et. al.
    • Journal Title

      Journal of Medical Microbiology 掲載確定(In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] A quantitative real-time immuno-PCR approach for detection of staphylococcal enterotoxins2007

    • Author(s)
      Fischer, A. , et. al.
    • Journal Title

      Journal of Molecular Medicine 85

      Pages: 461-469

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Sensitive test for screening Staphylococcus aureus in bovine mastitis by broth-cultivation and PCR2007

    • Author(s)
      Yamagishi, N. , et. al.
    • Journal Title

      The Veterinary Records 161

      Pages: 381-383

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Staphylococcal enterotoxin induces emesis through increasing serotonin release in intestine and it is down-regulated by cannabinoid receptor-12007

    • Author(s)
      Hu D.-L. , et. al.
    • Journal Title

      Cellular Microbiology 9

      Pages: 2267-2277

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] A quantitative real-time immuno-PCR approach for detection of staphylococcal enterotoxins2007

    • Author(s)
      Fischer, A., von Eiff, C., Kuczius, T., Omoe, K., Peters, G. and Becker, K.
    • Journal Title

      J. Mol. Med. 85

      Pages: 461-469

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Staphylococcal enterotoxin induces emesis through increasing serotonin release in intestine and it is down-regulated by cannabinoid receptor 12007

    • Author(s)
      Hu, D. -L., Zhu, G., Mori, F., Omoe, K., Okada, M., Wakabayashi, K., Kaneko, S., Shinagawa, K. and Nakane, A.
    • Journal Title

      Cell. Microbiol 9

      Pages: 2267-2277

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Sensitive test for screening Staphylococcus aureus in bovine mastitis by broth-cultivation and PCR2007

    • Author(s)
      Yamagishi, N., Jinkawa, Y., Omoe, K., Makino, S. and Oboshi. K.
    • Journal Title

      Vet. Rec. 161

      Pages: 381-383

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Staphylococcal enterotoxin induces emesis through increasing serotonin release in intestine and it is down-regulated by cannabinoid receptor-12007

    • Author(s)
      Hu D.-L., et. al.
    • Journal Title

      Cellular Microbiology 9

      Pages: 2267-2277

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A quantitative real-time immuno-PCR approach for detection of staphylococcal enterotoxins2007

    • Author(s)
      Fischer, A., et al.
    • Journal Title

      Journal of Molecular Medicine (In Press)(印刷中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Sensitive test for screening Staphylococcus aureus in bovine mastitis by broth-cultivation and PCR2007

    • Author(s)
      Yamagishi, N., et al.
    • Journal Title

      The Veterinary Records (In Press)(印刷中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Staphylococcal enterotoxin induces emesis through increasing serotonin release in intestine and it is down-regulated by cannabinoid receptor-12007

    • Author(s)
      Hu D.-L., et al.
    • Journal Title

      Cellular Microbiology (In Press)(印刷中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Food poisoning attributable to Staphylococcus aureus deficient in all of the staphylococcal enterotoxin gene so far reported.2006

    • Author(s)
      Kuramoto, S , et. al.
    • Journal Title

      Japanese Journal of Infectious Diseases 59

      Pages: 347-347

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Intranasal vaccination with a double mutant of staphylococcal enterotoxin C provides protection against Staphylococcus aureus infection2006

    • Author(s)
      Hu D.-L. , et. al.
    • Journal Title

      Mirobes and Infection 8

      Pages: 2841-2848

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Food poisoning attributable to Staphylococus aureus deficient in all of the staphylococcal enterotoxin gene so far reported.2006

    • Author(s)
      Kuramoto, S., Kodama, H., Yamada, K., Inui, I., Kitagawa, E., Kawakami, K., Satomi, R., Ikawa, A., Omoe, K., and Shinagawa, K.
    • Journal Title

      Jpn. J. Infect. Dis. 59

      Pages: 347-347

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Intranasal vaccination with a double mutant of staphylococcal enterotoxin C provides protection against Staphylococcus aureus infection2006

    • Author(s)
      Hu, D. -L., Omoe, K., Narita, K., Cui, J. -C., Shinagawa, K. and Nakane, A.
    • Journal Title

      Mirobes Infect 8

      Pages: 2841-2848

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Food poisoning attributable to Staphylococcus aureus deficient in all of the staphylococcal enterotoxin gene so far reported.2006

    • Author(s)
      Kuramoto, S, et al.
    • Journal Title

      Japanese Journal of Infectious Diseases 59

      Pages: 347-347

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Intranasal vaccination with a double mutant of staphylococcal enterotoxin C provides protection against Staphylococcus aureus infection2006

    • Author(s)
      Hu D.-L., et al.
    • Journal Title

      Mirobes and Infection 73

      Pages: 174-180

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Comparative prevalence of superantigenic toxin genes in methicillin-resistant and methicillin-susceptible Staphylococcus aureusisolates

    • Author(s)
      Hu, D.-L., Omoe, K., Inoue, F., Kasai, T., Yasujima, M., Shinagawa, K. and Nakane, A.
    • Journal Title

      J. Med. Microbiol. (In press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 霊長類モデルによるブドウ球菌エンテロトキシン群嘔吐活性の解析2008

    • Author(s)
      重茂克彦
    • Organizer
      日本細菌学会
    • Place of Presentation
      京都国際会議場
    • Year and Date
      2008-03-25
    • Related Report
      2007 Annual Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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