Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Anti-proliferative Effects of Water Extract of Agaricus blazei Murill in Human Lung Cancer Cell Line A549

A549 인체폐암세포의 증식에 미치는 신령버섯 추출물의 영향에 관한 연구

  • 최우영 (동의대학교 한의과대학 생화학교실, 부산대학교 생물학과) ;
  • 박철 (동의대학교 한의과대학 생화학교실) ;
  • 이재윤 ((주)청원농산) ;
  • 김기영 (부산대학교 의과대학 미생물학 및 면역학교실) ;
  • 박영민 (부산대학교 의과대학 미생물학 및 면역학교실) ;
  • 정영기 (동의대학교 미생물학과) ;
  • 이원호 (부산대학교 생물학과) ;
  • 최영현 (동의대학교 한의과대학 생화학교실)
  • Published : 2004.10.01
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Abstract

Agaricus blazei Murill is a medicinal mushroom native to Brazil. It used to be a source of antitumor and immunoactive compounds and considered a health food in many countries. In the present study, it was examined the effects of water extract of A. blazei (WEAB) on the growth of human lung carcinoma cell line A549 in order to investigate the anti-proliferative mechanism by WEAB. Treatment of A549 cells to WEAB resulted in the growth inhibition, morphological change and induction of apoptotic cell death in a dose-dependent manner as measured by MTT assay and flow cytometric analysis. Flow cytometric analysis revealed that WEAB caused G2/M phase arrest of the cell cycle, which was associated with a down-regulation of cyclin A in both transcriptional and translational levels. WEAB treatment induced a marked up-regulation of cyclin-dependent kinase (Cdk) inhibitor p21, however, the levels of Cdk2, Cdc2, Wee1, Cdc25C and p53 expression were remained unchanged in WEAB treated cells. In addition, WEAB treatment inhibited the levels of cyclooxygenase (COX)-2 mRNA and protein without alteration of COX-l expression. Taken together, these findings suggest that WEAB may be a potential chemotherapeutic agent for the control of human lung carcinorma cells and further studies will be needed to identify the active compounds that confer the anti-cancer activity of WEAB. Once such compounds are identified, the mechanisms by which they exert their effects can begin to be characterized.

브라질 기원인 신령 버섯 (A. blazei murill)은 강력한 항암 및 면역강화 작용을 가진 것으로 알려져 있다. 본 연구에서는 신령버섯 수용성 추출물(water extracted A. blazei Murill, WEAB)이 A549 인체 폐암세포 증식에 미치는 영향을 조사하였으며, 증식억제와 연관된 기전 해석을 시도하였다. WEAB가 처리된 A549 세포는 처리 농도 의존적으로 생존율이 감소되었으며, WEAB 처리는 암세포의 다양한 형태적 변형을 유발하였다. Flow cytometry 분석 결과로서 WEAB 처리에 의한 A549 폐암세포의 증식억제는 세포주기 G2/M arrest 및 apoptosis 유발과 직접적으로 연관성이 있음을 알 수 있었다. WEAB가 처리된 암세포에서 전사 및 번역 수준에서 cyclin A 발현의 감소 및 Cdk inhibitor p21 발현의 증가 현상이 관찰되었으나, cyclin B1, Cdk2, Cdc2, Wee1, Cdc25c 및 p53 등의 발현에는 큰 변화가 관찰되지 못하였다. 또한 WEAB의 처리는 COX-2 선택적 발현 저하를 유발하였으나, telomere 조절 관련 유전자들의 발현에는 큰 영향을 주지 못하였다. 이상의 결과는 신령버섯 추출물이 강력한 항암 및 암 예방 효능의 잠재력을 가지고 있음을 의미하며, 이에 관한 지속적인 연구가 필요할 것으로 생각된다.

Keywords

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