AGS 인체 위암세포에서 황흑산에 의한 ROS 생성 및 caspase 활성 의존적 apoptosis 유발

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홍수현;박철;김경민;최영현
Hong, Su Hyun;Park, Cheol;Kim, Kyoung Min;Choi, Yung Hyun

  • 투고 : 2015.06.25
  • 심사 : 2015.07.23
  • 발행 : 2015.11.30

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.

키워드

AGS cells;apoptosis;caspase;Hwangheuk-san;ROS (reactive oxygen species)

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