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프로폴리스가 X-선에 노출된 마우스 정소에 미치는 방사선 방어 효과

Radioprotective Effects of Propolis on the Mouse Testis Exposed to X-ray.

  • 지태정 (가야대학교 방사선학과) ;
  • 김종식 (안동대학교 자연과학대학 생명과학과) ;
  • 정형진 (안동대학교 생명자원과학부 생약자원) ;
  • 서을원 (안동대학교 자연과학대학 생명과학과)
  • Ji, Tae-Jung (Dept. of Radiological Science, Kaya University) ;
  • Kim, Jong-Sik (Dept. of Biological Science, Andong National University) ;
  • Jeong, Hyung-Jin (School of Bioresource Science, Andong National University) ;
  • Seo, Eul-Won (Dept. of Biological Science, Andong National University)
  • 발행 : 2007.05.25

초록

프로폴리스는 꿀벌에 의해 생산되는 천연물질로서, 항미생물, 항산화, 항암 활성이 있는 것으로 알려져 있다. 그러나 프로폴리스에 의한 방사선 방어효과에 대한 특성은 잘 연구되지 않았다. 마우스 정소조직을 대상으로 프로폴리스에 의한 방사선 방어효과를 연구하기 위하여, 프로폴리스를 섭식시키거나 복강 투여한 후 각각 방사선을 조사한 후, 마우스의 정소조직을 광학현미경과 전자현미경을 통해 관찰하였다. 그 결과 방사선에 의해 유도된 세포의 변형이 프로폴리스에 의해 회복됨을 알 수 있었다. 또한 이러한 방사선 회복 효과의 분자기전을 이해하고자 DNA microarray 실험을 수행하였다. 그 결과 방사선만 조사한 마우스에 비해 방사선과 프로폴리스를 동시에 처리한 마우스의 정소에서 2배 이상 증가되는 유전자 65개를 선별하였고, 반대로 2배 이상 감소되는 유전자 진4개를 선별하였다. 이중에서 각각의 유전자군에서 2개의 유전자를 선별하여 RT-PCR을 수행하여 마이크로어레이 결과를 검증하였다. 이러한 결과들은 마우스 모델에서 프로폴리스에 의한 방사선 방어효과의 분자기전을 이해하는데 도움이 될 것으로 기대된다.

The propolis is natural product produced by honeybees and is known to have many biologically useful properties such as anti-microbial, anti-oxidative and anti-tumorigenic activity. However, its radio-protective property has not been well studied. To investigate radio-protective effect of propolis on mouse testis, mice were supplemented with propolis after 5 Gy irradiation. The histological changes of testis were detected by TEM. The results indicate that propolis may protect tissue deformation which is induced by 5 Gy of ionizing radiation. Furthermore, to elucidate the potential molecular mechanisms involved in radio-protective property of propolis, we performed microarray experiments using oligo DNA microarray. We found 65 up-regulated genes and 224 down-regulated genes, whose expression levels were affected more than 2-fold by propolis treatment in mice irradiated at 5 Gy. We confirmed microarray data with reverse transcription-PCR using gene specific primers. The results of RT-PCR are highly correlated with those of microarray. These results may help understanding molecular mechanisms of radioprotective effects by propolis in mouse model.

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