생명과학회지 (Journal of Life Science)

  • 제25권11호
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  • Pages.1235-1243
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  • 2015
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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AGS 인체 위암세포에서 황흑산에 의한 ROS 생성 및 caspase 활성 의존적 apoptosis 유발

Induction of Apoptosis by Hwangheuk-san in AGS Human Gastric Carcinoma Cells through the Generation of Reactive Oxygen Species and Activation of Caspases

  • 홍수현 (동의대학교 한의과대학 생화학교실) ;
  • 박철 (동의대학교 자연생활과학대학 분자생물학과) ;
  • 김경민 (동의대학교 한의과대학 순환신경내과학교실) ;
  • 최영현 (동의대학교 한의과대학 생화학교실)
  • Hong, Su Hyun (Department of Biochemistry, Dongeui University College of Korean Medicine) ;
  • Park, Cheol (Department of Molecular Biology, College of Natural Sciences and Human Ecology, Dongeui University) ;
  • Kim, Kyoung Min (Department of Caridovascular & Neurologic Disease, College of Korean Medicine, Dongeui University) ;
  • Choi, Yung Hyun (Department of Biochemistry, Dongeui University College of Korean Medicine)
  • 투고 : 2015.06.25
  • 심사 : 2015.07.23
  • 발행 : 2015.11.30
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초록

황흑산은 동의보감의 복강과 장옹의 처방을 위해 기록된 처방전으로 오랫동안 사용되어 왔으나, 항암 효능에 대한 구체적인 연구는 전혀 이루어진 바 없다. 본 연구에서는 AGS 인체 위암세포를 대상으로 황흑산 처리에 의한 증식억제와 연관된 apoptosis 유발 및 관련 기전 연구를 수행하였다. AGS 위암세포에 황흑산 추출물을 처리함에 처리 농도 의존적으로 증식이 억제되었으며, 이는 apoptosis 유발과 연관성이 있음을 핵의 형태적 변형과 sub-G1기 세포의 축적 등으로 확인하였다. 황흑산 추출물에 의한 apoptosis 유도에는 pro-apoptotic Bax 단백질의 발현 증가와 anti-apoptotic Bcl-2의 발현 감소 및 미토콘드리아에서 세포질로의 cytochrome c 유리와 연관성이 있었으며, 세포 내 활성산소종(reactive oxygen species, ROS)의 축적을 증가시켰다. 또한 황흑산 추출물에 의한 apoptosis 유발은 caspases (caspase-3, -8 및 -9)의 활성을 증가시켰으며, poly (ADP-ribose)-polymerase 단백질의 단편화를 초래하였다. 그러나 ROS scavenger 및 pan-caspases inhibitor는 황흑산 추출물에 의한 apoptosis의 유발을 거의 완벽하게 억제하였으며, 암세포의 증식억제도 차단하였다. 이상의 결과는 황흑산 추출물에 의한 apoptosis가 ROS 생성 및 caspase 활성 의존적으로 일어남을 의미하는 것으로 황흑산의 항암기전 해석을 이해하고 향후 지속적인 연구를 위한 유용한 자료로 사용될 것이다.

Hwangheuk-san (HHS) is a Korean multi-herb formula comprising four medicinal herbs. HHS, which was recorded in “Dongeuibogam,” has been used to treat patients with inflammation syndromes and digestive tract cancer for hundreds of years. However, little is known about its anti-tumor efficacy. The present study investigated the pro-apoptotic effect and mode of action of HHS against AGS human gastric carcinoma cells. HHS inhibited the cell growth of AGS cells in a dose-dependent manner, which was associated with the induction of apoptotic cell death, as evidenced by the formation of apoptotic bodies, chromatin condensation, and an accumulation of cells in the sub-G1 phase. HHS-induced apoptotic cell death was associated with the up-regulation of pro-apoptotic Bax protein expression, down-regulation of antiapoptotic Bcl-2 protein, and the release of cytochrome c from mitochondria to the cytosol. The treatment of AGS cells with HHS significantly elevated the generation of reactive oxygen species (ROS). Additionally, apoptosis-inducing concentrations of HHS induced the activation of both caspase-9 and -8, initiator caspases of the mitochondrial-mediated intrinsic and death receptor-mediated extrinsic pathways, respectively, and caspase-3, accompanied by proteolytic degradation of poly (ADP-ribose)-polymerase. However, ROS scavenger and pan-caspases inhibitor significantly blocked HHS-induced growth inhibition and apoptosis. Taken together, these findings suggest that HHS induces apoptosis through ROS- and caspase-dependent mechanisms and that HHS may be a potential chemotherapeutic agent for the control of human gastric cancer.

키워드

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