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2007 Fiscal Year Annual Research Report

小児中耳炎の難治化の病態解明と自然免疫および特異的免疫の賦活に関する研究

Research Project

Project/Area Number 19591987
Research InstitutionWakayama Medical University

Principal Investigator

山中 昇  Wakayama Medical University, 医学部, 教授 (10136963)

Co-Investigator(Kenkyū-buntansha) 藤原 啓次  和歌山県立医科大学, 医学部, 准教授 (80326371)
田村 真司  和歌山県立医科大学, 医学部, 講師 (10244724)
保富 宗城  和歌山県立医科大学, 医学部, 講師 (90336892)
島田 絢  和歌山県立医科大学, 医学部, 助教 (90326372)
Keywords急性中耳炎 / インフルエンザ菌 / バイオフィルム / 溶連菌 / 細胞内侵入
Research Abstract

1.インフルエンザ菌のバイオフィルム形成検出法の確立 小児急性中耳炎28例の鼻咽腔より分離された無莢膜型インフルエンザ菌70株を用い、バイオフィルム形成の検討を以下の2つの方法で検討した。
(1)クリスタルバイオレット染色法による定量的評価:96 wellプレートを用い、クリスタルバイオレット染色法によるバイオフィルムの定量的評価を行った。バイオフィルム形成の評価は、測定菌株OD_<570>値/陽性コントロール株OD_<570>値をbiofilm formation index(BFI)と定義し、BFI≧0.4の株をバイオフィルム形成株とした。
(2)共焦点レーザー顕微鏡による画像評価:96ピン付き96 wellプレートを用い、共焦点レーザー顕微鏡によりバイオフィルム形成(シアル酸染色)とインフルエンザ菌(核酸染色)の観察を行った。
70株のうち59株(84.3%)でバイオフィルム形成が認められ、さらにクリスタルバイオレット染色法によるバイオフィルム形成の定量的評価は、共焦点レーザー顕微鏡による画像評価を反映することが判明した。
2.溶連菌の細胞内侵入に関する遺伝子検索急性咽頭・扁桃炎から分離された溶連菌の細胞内侵入関連遺伝子であるsil遺伝子に発現について、242株の臨床分離株について検討し、emm型と比較検討した。29株(11.98%)に遺伝子発現が認められ、すべての発現株にspeB allelesを認めたが、spec C allelesを認めたのは69%であった。
以上の成績は小児から得られた臨床分離株から初めてバイオフィルム形成を証明し、さらに非浸潤性株の溶連菌において細胞内侵入関連遺伝子の発現を証明したものであり、極めて意義の高いものと考える。

  • Research Products

    (19 results)

All 2008 2007

All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (11 results) Book (1 results)

  • [Journal Article] Efficacy of a novel oral carbapenem,tebipenem pivoxil(TBM-PI),against experimental otitis media caused by penicillin resistant Streptococcus pneumoniae in chinchilla2007

    • Author(s)
      Hotomi, M, et. al.
    • Journal Title

      Vaccine 25

      Pages: 2478-2484

    • Peer Reviewed
  • [Journal Article] In vitro induction and selection of fluoroquinolone-resistant mutants of Streptococcus pyognegen strains with multiple emm types2007

    • Author(s)
      Billal DS, et. al.
    • Journal Title

      J Antimicrob Chemother 59

      Pages: 28-34

    • Peer Reviewed
  • [Journal Article] Rapid identification of nontypeable and serotype b Haemophilus influenzae from nasopharyngeal secretions by the multiplex PCR2007

    • Author(s)
      Billal DS, et. al.
    • Journal Title

      Int J Pediatr Otorhinolaryngol 71

      Pages: 269-274

    • Peer Reviewed
  • [Journal Article] Genetic characteristics and clonal dissemination of beta-lactamase-negative ampicillin-resistant Haemophilus influenzae strains isolated from the upper respiratory tract of patients in Japan2007

    • Author(s)
      Hotomi, M, et. al.
    • Journal Title

      Antimicrob Agents Chemother 51

      Pages: 3969-3976

    • Peer Reviewed
  • [Journal Article] Can the Etest correctly determine the MICs of beta-lactam and cephalosporin antibiotics for beta-lactamase-negative ampicillin-resistant Haemophilus influenzae2007

    • Author(s)
      Billal DS, et. al.
    • Journal Title

      Antimicrob Agents Chemother 51

      Pages: 3463-3464

    • Peer Reviewed
  • [Journal Article] Study of nasopharyngeal bacterial flora.Variations in nasopharyngeal bacterial flora in schoolchildren and adults when administered antimicrobial agents2007

    • Author(s)
      Konno M, et. al.
    • Journal Title

      J Infect Chemother 13

      Pages: 235-254

    • Peer Reviewed
  • [Journal Article] 耳鼻咽喉科および小児科感染症に対する外来抗菌薬静注療法の使用に関する検討2007

    • Author(s)
      山中 昇, 他
    • Journal Title

      化学療法の領域 23

      Pages: 103-114

    • Peer Reviewed
  • [Presentation] Acute rhinosinusitis:Medical therapy.2007

    • Author(s)
      Yamanaka N
    • Organizer
      12^<th> Congress of the International Rhinologic Society,
    • Place of Presentation
      Venezia,Italy
    • Year and Date
      20071205-08
  • [Presentation] Prevalence of causative pathogens in acute rhinosinusitisin Japan2007

    • Author(s)
      Hotomi M, et. al.
    • Organizer
      12^<th> Congress of the International Rhinologic Society,
    • Place of Presentation
      Venezia,Italy
    • Year and Date
      20071205-08
  • [Presentation] Conjunctivitis-otitis media-rhinosinusitis syndrome:Is it a new syndrome?2007

    • Author(s)
      Sugita R, et. al.
    • Organizer
      12^<th> Congress of the International Rhinologic Society,
    • Place of Presentation
      Venezia,Italy
    • Year and Date
      20071205-08
  • [Presentation] New approaches to prevention and treatment of rhinological disease-Nasal immunization and new drug delivery system.2007

    • Author(s)
      Hotomi M, et. al.
    • Organizer
      12^<th> Congress of international rhinology society
    • Place of Presentation
      Venezia,Italy
    • Year and Date
      20071205-08
  • [Presentation] Clonal spread of drug-resistant S.pneumoniae and H.influenzae and disease burden for children in Japan2007

    • Author(s)
      Yamanaka N
    • Organizer
      12^<th> International Conference on Emerging Infectious Diseases in the Pacific Rim
    • Place of Presentation
      Haikou,Hainan,China
    • Year and Date
      20071204-06
  • [Presentation] Protection of pneumococcal infection by maternal intranasal immunization with Pneumococal surface protein A(PspA).2007

    • Author(s)
      Hotomi M, et. al.
    • Organizer
      5^<th> International conference of mucosal immunology
    • Place of Presentation
      Tokyo,Japan
    • Year and Date
      20070709-12
  • [Presentation] Functions of tonsils in the mucosal immune system of the upper respiratory tract using a novel animal model,Suncus murinus.2007

    • Author(s)
      Suzumoto M, et. al.
    • Organizer
      13^<th> International congress of mucosal immunology
    • Place of Presentation
      Tokyo,Japan
    • Year and Date
      20070709-12
  • [Presentation] The mother-offspring dyad and the pathogen specific antibody transfer.2007

    • Author(s)
      Yamauchi K, et. al.
    • Organizer
      13^<th> International congress of mucosal immunology
    • Place of Presentation
      Tokyo,Japan
    • Year and Date
      20070709-12
  • [Presentation] Bacteriological Efficacy of Azithromycin on Nontypeable Haemophilus In fluenzae Adhered to and Entered Cultured Human Epithelial Cells.2007

    • Author(s)
      Yamanaka N, et. al.
    • Organizer
      Asia RTI Forum
    • Place of Presentation
      Hanoi,Vietnam
    • Year and Date
      20070609-10
  • [Presentation] Efficacy of novel oral carbapenem,tebipenem pivoxil(TBM-PI),against experimental otitis media caused by penicillin resistant Streptococcus pneumonia in chinchilla2007

    • Author(s)
      Suzumoto M, et. al.
    • Organizer
      9^<th> international Symposium on Recent Advances in Otitis Media.
    • Place of Presentation
      Florida,USA
    • Year and Date
      20070603-07
  • [Presentation] Maternal Intranasal Immunization with outer membrane protein P6 maintain specific antibody level of derived offspring2007

    • Author(s)
      Yamauchi K, et. al.
    • Organizer
      9^<th> international Symposium on Recent Advances in Otitis Media
    • Place of Presentation
      Florida,USA
    • Year and Date
      20070603-07
  • [Book] 医科免疫学改訂第6版2008

    • Author(s)
      菊地 浩吉, 他
    • Total Pages
      470
    • Publisher
      南江堂

URL: 

Published: 2010-02-04   Modified: 2016-04-21  

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