Tuberculosis and Respiratory Diseases

  • 제59권3호
  • /
  • Pages.272-278
  • /
  • 2005
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  • 1738-3536(pISSN)
  • /
  • 2005-6184(eISSN)
대한결핵및호흡기학회 (The Korean Academy of Tuberculosis and Respiratory Diseases)
권호 표지

BCG 예방접종을 받은 개체에서 유도되어 있는 결핵균 균체항원에 특정한 CD8+T 세포의 보호 면역반응

M. tuberculosis Somatic Antigen Specific CD8+T cell Responses in BCG-Vaccinated Subjects

  • 조장은 (연세대학교 의과대학 미생물학교실) ;
  • 조상래 (연세대학교 의과대학 미생물학교실) ;
  • 이경화 (한림대학교 유전체응용연구소) ;
  • 박승규 (국립마산결핵병원) ;
  • 조성애 (연세대학교 의과대학 미생물학교실)
  • Cho, Jang-Eun (Department of Microbiology, Brain Korea 21 project for Medical Sciences, Yonsei University Medical Center) ;
  • Cho, Sang-Nae (Department of Microbiology, Brain Korea 21 project for Medical Sciences, Yonsei University Medical Center) ;
  • Lee, Kyung Wha (Hallym Institution for Genome Application Hallym University) ;
  • Park, Seung Kyu (National Masan Tuberculosis Hospital) ;
  • Cho, Sungae (Department of Microbiology, Brain Korea 21 project for Medical Sciences, Yonsei University Medical Center)
  • 투고 : 2005.06.16
  • 심사 : 2005.08.26
  • 발행 : 2005.09.30
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초록

배 경 : 결핵의 보호면역 반응에서 CD8+T 세포에 의한 여러 기전이 중요한 역할을 한다는 사실이 최근에 보고되고 있다. $IFN-{\gamma}$ 분비 외에도 결핵균으로 감염된 세포에 독성을 나타내어 직접 결핵균으로 감염된 세포를 제거하는 독성능 또한 그 역할이 중요하다고 알려지고 있는데, BCG 예방접종을 받은 개체에서도 이러한 균체항원에 특정한 CD8+T 세포의 독성능이 유도되어 있어서 보호면역 반응에서의 역할을 하는지 연구하였다. 대상 및 방법 : HLA-A*0201 과 A*0206를 표현하며 BCG 예방접종을 한 개체들의 혈액에서 백혈구를 분리하고 균체항원의 항원결정기 ($ThyA_{30-38}$) 에 대한 독성능과 ex vivo $IFN-{\gamma}$ 분비능을 유도하였다. 결 과 : 이들 대상에게서 $IFN-{\gamma}$ 분비능과 독성능이 유도되는 것을 관찰할 수 있었고, 또한 HLA-A*0201에 결합하여 CD8+T 세포의 면역 반응을 일으키는 $ThyA_{30-38}$ 펩티드들은 HLA-A*0206인 개체에서도 면역반응을 일으키는 것을 관찰할 수 있었다. 결 론 : 균체 항원에 특정한 CD8+T 세포들의 $IFN-{\gamma}$ 분비 능과 독성능이 BCG 백신주사를 맞은 개체에서 유도되어 있는 것을 관찰할 수 있었다. 따라서 이러한 균체항원에 특정한 CD8+T 세포들이 보호면역 반응에 관여한다는 것을 제시하며, 또한 HLA-A*0201 개체들과 HLA-A*0206 개체들을 대상으로 하는 백신이나 치료제로써 $ThyA_{30-38}$ 펩티드의 사용 가능성을 제시한다.

Background : The immune responses mediated by CD8+T cells are known to be significant in controlling M. tuberculosis infections. In order to determine the role of cytotoxic CD8+T cells in the protective immune mechanism in latently infected subjects, this study examined whether or not the cytotoxic immune responses of CD8+T cells specific to the M. tuberculosis somatic antigens are induced in BCG vaccinated healthy subjects. Methods : Cytotoxicity and $IFN-{\gamma}$ elispot assays were used to investigate the activities of CD8+T cells specific for the $thyA_{30-38}$ peptide epitope in circulating peripheral blood mononuclear cells (PBMC) from BCG-vaccinated HLA-A*0201 and A*0206 subjects. Results : The results indicate the cytotoxic and $IFN-{\gamma}$ immune responses of CD8+T cells specific for $thyA_{30-38}$ were induced in BCG vaccinated healthy subjects. Conclusion : The cytotoxic and $IFN-{\gamma}$ responses by CD8+T cells specific for the M. tuberculosis somatic antigens are induced in BCG-vaccinated subjects, and appear to be involved in the protective immune mechanism in latently infected people against a M. tuberculosis infection.

키워드

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