사독(蛇毒)이 세포자멸사와 관계있는 Death Receptor를 통한 인간 대장암 세포 성장억제에 미치는 영향

Inhibitory Effect of Snake Venom on Colon Cancer Cell Growth Through Induction of Death Receptor Dependent Apoptosis

  • 오명진 (경원대학교 한의과대학 침구학교실) ;
  • 송호섭 (경원대학교 한의과대학 침구학교실)
  • Oh, Myung-Jin (Dept. of Acupuncture & Moxibustion, College of Oriental Medicine, Kyungwon University) ;
  • Song, Ho-Sueb (Dept. of Acupuncture & Moxibustion, College of Oriental Medicine, Kyungwon University)
  • 투고 : 2012.01.17
  • 심사 : 2012.01.26
  • 발행 : 2012.02.20

초록

목적 : 이 연구는 $Vipera$ $lebetina$ $turanica$ 사독(蛇毒)이 인간 대장암 세포주인 HCT116 세포에서 세포주기진행, death receptor 의존적 세포자멸사 경로 관련단백질 발현 및 NK-${\kappa}B$와 STAT3 활성에 미치는 영향을 규명함으로써 대장암 세포 성장에 대한 억제와 그 기전에 대하여 살펴보고자 하였다. 방법 : 사독을 처리한 후 HCT116의 세포주기를 분석하기 위해서 FACS analysis를 시행하였고, apoptosis 평가에는 TUNEL assay를 시행하였으며 death receptor 의존적 세포자멸사 경로 관련단백질 및 NF-${\kappa}B$와 STAT3 활성 변동 관찰에는 RT-PCR 및 western blot analysis를 시행하였다. 결과 : 1. 0.1, 0.5 및 $1{\mu}g/m{\ell}$ 등의 사독을 처리한 결과 농도 의존적으로 HCT116 대장암 세포활성의 억제가 나타났다. 2. 0.1, 0.5 및 $1{\mu}g/m{\ell}$ 등의 사독을 처리한 결과 농도의존적으로 세포자멸사 활성세포의 증가가 나타났고, SVT $1{\mu}g/m{\ell}$에서는 60-70%의 대장암세포 억제 효과가 나타났다. 3. 0.1, 0.5 및 $1{\mu}g/m{\ell}$ 등의 사독을 처리한 결과 약한 G1 arrest와 강한 G2/M arrest가 나타났고, G0/G1 또는 G2/M 관련 cyclin D, E 및 B1의 증가가 나타났다. 4. 0.1, 0.5 및 $1{\mu}g/m{\ell}$ 등의 사독을 처리한 결과 death receptor4, 5의 발현증가와 그에 따른 세포자멸사 촉진 Bax, PARP, caspase-3, -8, -9 발현 증가 및 세포자멸사 억제의 Bcl-2의 발현 감소 등이 나타났다. 6. 0.1, 0.5 및 $1{\mu}g/m{\ell}$ 등의 사독을 처리한 결과 NF-${\kappa}B$와 STAT3의 활성변동은 관찰되지 않았다. 결론 : 이상의 연구에서 사독은 death receptor 의존적인 세포자멸사를 촉진하여 대장암의 화학치료 내성을 극복할 수 있는 하나의 대안이 될 것으로 생각되지만 보다 심화된 연구가 필요할 것으로 사료된다.

키워드

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