생명과학회지 (Journal of Life Science)

  • 제17권12호
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  • Pages.1709-1716
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  • 2007
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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마늘 열수 추출물의 활성산소종 생성을 통한 인체백혈병세포의 apoptosis 유발

Water Extract of Allium sativum L. Induces Apoptosis in Human Leukemia U937 Cells through Reactive Oxygen Species Generation

  • 최우영 (동의대학교 한의과대학 생화학교실) ;
  • 정경태 (동의대학교 자연과학대학 임상병리학과) ;
  • 윤태경 (동의대학교 공과대학 환경공학과) ;
  • 최병태 (부산대학교 한의학전문대학원 해부학교실) ;
  • 이용태 (동의대학교 한의과대학 생리학교실) ;
  • 이원호 (부산대학교 자연과학대학 생물학과) ;
  • 류충호 (경상대학교 농업생명과학대학 응용생명공학과) ;
  • 최영현 (동의대학교 한의과대학 생화학교실)
  • Choi, Woo-Young (Department of Biochemistry, Dongeui University) ;
  • Chung, Kyung-Tae (Department of Laboratory Science Dongeui University) ;
  • Yoon, Tae-Kyung (Department of Environmental Engineering Major Dongeui University) ;
  • Choi, Byung-Tae (Department of Anatomy, Graduate School of Oriental Medicine, Pusan National University) ;
  • Lee, Yong-Tae (Department of Physiology, College of Oriental Medicine Dongeui University) ;
  • Lee, Won-Ho (Department of Biology, College of Natural Sciences, Pusan National University) ;
  • Ryu, Chung-Ho (Division of Applied Life Science, Institute of Agriculture and Life Science, Gyeongsang National University) ;
  • Choi, Yung-Hyun (Department of Biochemistry, Dongeui University)
  • 발행 : 2007.12.30
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초록

본 연구에서는 몇 가지 암세포를 대상으로 마늘 열수추출물(WEAS)의 항암활성을 조사하였으며, 비교적 높은 감수성을 보인 백혈병세포를 대상으로 세포증식억제가 apoptosis 유도와 연관성이 있음을 제시하였다. WEAS에 의한 U937 세포의 apoptosis 유도는 세포주기 G2/M arrest와 연관성이 있었으며, 다양한 apoptosis조절 유전자들의 발현 변화를 동반하였음을 확인하였다. 이러한 apoptosis조절 인자들의 발현변화는 미토콘드리아 막 전위의 소실과 연관성이 있었으며, WEAS에 의한 암세포의 G2/M arrest에 의한 apoptosis 유발에 ROS가 중요한 조절자로 작용함을 알 수 있었다.

The health benefits of garlic (Allium sativum L.) are derived from a wide variety of components and from the different ways it is administered. The known health benefits of garlic include cardiovascular protective effects, stimulation of immune function, reduction of blood glucose level, protection against microbial, viral and fungal infections, as well as anticancer effects. In the present study, it was examined the effects of water extract of A. sativum (WEAS) on the growth of cultured human tumor cells in order to investigate its anti-proliferative mechanism. Treatment of WEAS to tumor cells resulted in the growth inhibition, especially in leukemia cells, which was associated with induction of G2/M arrest of the cell cycle and apoptosis. In order to further explore the critical events leading to apoptosis in WEAS-treated U937 human leukemia cells, the following effects of WEAS on components of the mitochondrial apoptotic pathway were examined: generation of reactive oxygen species (ROS), alteration of the mitochondrial membrane potential (MMP), and the expression changes of Bcl-2 and IAP family proteins. The cytotoxic effect of WEAS was mediated by its induction of apoptosis as characterized by the occurrence of DNA ladders, apoptotic bodies and chromosome condensation in U937 cells. The WEAS-induced apoptosis in U937 cells was correlated with the generation of intracellular ROS, collapse of MMP, activation of caspase-3 and down-regulation of anti-apoptotic proteins. The quenching of ROS generation with antioxidant N-acetyl-L-cysteine conferred significant protection against WEAS-elicited ROS generation, caspase-3 activation, G2/M arrest and apoptosis. In conclusion, the present study reveals that the cellular ROS generation plays a pivotal role in the initiation of WEAS-triggered apoptotic death in U937 cells.

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