Radiation Oncology Journal

The Korean Society for Radiation Oncology (대한방사선종양학회)
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Proteomics of Protein Expression Profiling in Tissues with Different Radiosensitivity

Proteomics를 이용한 마우스 조직에서의 방사선 감수성 조절 단백질의 탐색

  • An, Jeung-Hee (Department of Radiation Oncology Yonsei University College of Medicine, Brain Korea 21 Project for Medical Science) ;
  • Kim, Ji-Young (Department of Radiation Oncology Yonsei University College of Medicine, Brain Korea 21 Project for Medical Science) ;
  • Seong, Jin-Sil (Department of Radiation Oncology Yonsei University College of Medicine, Brain Korea 21 Project for Medical Science)
  • 안정희 (연세대학교 의과대학 방사선종양학교실, 두뇌한국21 의과학사업단) ;
  • 김지영 (연세대학교 의과대학 방사선종양학교실, 두뇌한국21 의과학사업단) ;
  • 성진실 (연세대학교 의과대학 방사선종양학교실, 두뇌한국21 의과학사업단)
  • Published : 2004.12.01
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Abstract

Purpose: The purpose of this study was to identify Radiosensitivity of proteins in tissues with different radiosensitivity. Materials and Methods: C3H/HeJ mice were exposed to 10 Gy. The mice were sacrifiud 8 hrs after radiation. Their spleen and liver tissues were collected and analyzed histologicaly for apoptosis. The expressions of radiosusceptibillty protein were analyzed by 2-dimensional electrophoresis and matrix-assisted laser desorption ionization time-of-flight mass spectrometry. Resilts: The Peak of apoptosis levels were $35.3{\pm}1.7{\%}$ in spleen and $0.6{\pm}0.2{\%}$ in liver at 8 hrs after radiation. Liver, radioresistant tissues, showed that the levels of ROS metabolism related to proteins such as cytochromm c, glutathione S transferase, NADH dehydrogenase, riken cDNA and peroxiredoxin Vl increased after radiation. The expression of cytochrome c increased significantly in spleen and liver tissues after radiation. In spleen, radiosensitivity tissue, the identified proteins showed a significantly quantitative alteration following radiation. It was categorized as signal transduction, apoptosis, cytokine, Ca signal related protein, stress-related protein, cytoskeletal regulation, ROS metabolism, and others. Conclusion: Differences of radiation-induced apoptosis by tissues specifted were coupled with the induction of related radiosensitivity and radioresistant proteins. The result suggests that apoptosis relate protein and redox proteins play important roles in this radiosusceptibility.

목적:. 방사선 감수성이 다른 마우스 조직에서 apoptosis 유도 수준을 확인하고 방사선 감수성에 관여 된 인자를 Proteomics를 통해서 확인한다. 대상 및 방법: C3H/HeJ 마우스에 10 Gy 방사선을 조사하고 8시간 후 비장과 간을 채취하여 apoptosis 유도 수준을 비교 분석하였다. 조직에서 단백질을 추출하여 2-dimension electrophoresis (2-DE)를 실시하였다. 2-DE에서 방사선에 의해 발현의 변화를 보이는 gel의 spot를 trypsin 처리하여 MALDI-TOF 측정한 후 Swiss-prot database를 통하여 단백질 을 동정하였다. 결과: Apoptosls index는 방사선 조사 후 비장 조직에서 $35.3{\pm}1.7{\%}$, 간조직은 $0.6{\pm}0.2{\%}$로 비장에 비해 간 조직이 낮게 나타났다. Proteomoics 결과에서 방사선 내성 조직인 간은 ROS대사에 관여되는 단백질인 glutathione Stransferase Pi, carbonic anhydrase, NADH dehydrogenase, peroxiredoxin VI, riken cDNA 등이 방사선 조사 후 증가되었고 apoptosis 관련된 단백질인 cytochrome c는 간과 비장 조직에서 확인되었다. 그러나 방사선 민감 조직인 비장에서는 방사선 조사 후 산화적 Stress에 관련된 단백질, apoptosis 관련 단백질, 신호 전달에 관련된 단백질, 면역반응, cell cycle, Ca 신호 전달, 대사 cycle에 관련된 단백질 등이 방사선에 관련하여 발현의 변화를 보여 주었다. 결론 : Apoptosis유도 수준이 다른 조직에서 apoptosis에 관련된 단백질과 redox에 관련된 단백질은 방사성 감수성 조절에 관련된 것으로 보인다.

Keywords

References

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