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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Resveratrol Induces Apoptosis in Primary Human Prostate Cancer Cells

Primary 인체 전립선 암세포에서 Resveratrol의 Apoptosis 유도 효과

  • 강혜인 (순천대학교 식품영양학과) ;
  • 김재용 (순천대학교 기초과학연구소) ;
  • 조현동 (순천대학교 식품영양학과) ;
  • 박경욱 ((주)에스바이오푸드) ;
  • 강점순 (부산대학교 원예생명과학과) ;
  • 서권일 (순천대학교 식품영양학과)
  • Received : 2010.04.16
  • Accepted : 2010.05.10
  • Published : 2010.08.31
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Abstract

To evaluate resveratrol as a prostate cancer preventive material, we investigated its anti-proliferative and apoptotic effects in RC-58T/h/SA#4 primary human prostate cancer cells. Resveratrol significantly decreased the number of viable RC-58T/h/SA#4 cells in a dose- and time-dependent manner. Resveratrol showed cytotoxicity against RC-58T/h/SA#4, LNCaP, PC-3 human prostate cancer cells with $IC_{50}$ values of 245, 320 and $340\;{\mu}M$, respectively. However the cytotoxic potential of resveratrol against normal RWPE-1 cells was lower ($IC_{50}=982\;{\mu}M$). Resveratrol induced cell death as evidenced by the increased formation of apoptotic bodies, nuclear condensation, sub-G1 phase, and DNA fragmentation. Resveratrol activated initiator caspases 8, and 9 as well as effector caspase 3 in a dose-dependent manner. Furthermore, the general caspase inhibitor z-VAD-fmk significantly inhibited resveratrol-induced apoptosis compared to cells without treatment. These results clearly indicate that resveratrol-induced apoptosis was dependent on caspase activation. Further, resveratrol modulated the down regulation of Bcl-2 (anti-apoptotic), and Bid. However, the level of Bax (pro-apoptotic) remained unchanged. These results suggest that resveratrol induced apoptosis in RC-58T/h/SA#4 cells via a mitochondrial-mediated caspase-dependent pathway, suggesting therapeutic potential against prostate cancer.

본 연구에서는 resveratrol을 전립선 암 치료제로의 활용 가능성을 조사하기 위하여 primary 인체 전립선 암세포에 대한 resveratrol의 성장억제 효과 및 그 기전에 대하여 조사 하였다. Resveratrol은 RC-58T/h/SA#4 세포에서 농도 및 시간에 의존적으로 세포의 증식을 억제하였으며, $IC_{50}$ 값은 암세포인 RC-58T/h/SA#4, LNCaP, PC-3에서는 각각 245, 320, $340\;{\mu}M$, 전립선 정상세포인 RWPE-1에서는 $982\;{\mu}M$로 나타나 정상세포에서보다는 암세포에서 그 독성이 크게 나타났다. 또한 resveratrol에 의해 유도된 세포 사멸은 핵 응축, sub-G1 함량 증가 및 DNA 분절 현상이 나타나 apoptosis를 유도함을 알 수 있었다. Resveatrol은 caspase-8, -9 및 effector casapse-3 활성을 농도 의존적으로 증가시켰으며, caspase 저해제인 z-VAD-fmk로 caspase의 처리 시 resveratrol에 의한 apoptosis 유도 현상이 유의적으로 감소되어 resveratrol에 의한 RC-58T/h/SA#4 세포의 apoptosis 유도에 caspase가 중요한 역할을 하고 있음을 확인하였다. Resveratrol에 의해 anti-apoptotic 인자인 Bcl-2 및 Bid 단백질의 발현은 감소하였으나, pro-apoptotic 인자인 Bax 단백질 발현은 변화가 없었다. 따라서 본 연구는 resveratrol이 RC-58T/h/SA#4세포에서 caspase 의존형 미토콘드리아 경로에 의해 유도되며, resveratrol은 전립선암 치료제로서 사용 가능성을 시사한다.

Keywords

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