Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Celecoxib Enhances Susceptibility of Multidrug Resistant Cancer Cells to 17-Allylamino-17-demethoxy geldanamycin through Dual Induction of Apoptotic and Autophagic Cell Death

Celecoxib의 apoptotic 및 autophagic cell death 유도에 의한 항암제 다제내성 암세포의 17-allylamino-17-demethoxygeldanamycin 감수성 증강

  • Moon, Hyun-Jung (Department of Biochemistry, Pusan National University School of Medicine) ;
  • Park, So-Young (Department of Biochemistry, Pusan National University School of Medicine) ;
  • Lee, Su-Hoon (Department of Biochemistry, Pusan National University School of Medicine) ;
  • Kang, Chi-Dug (Department of Biochemistry, Pusan National University School of Medicine) ;
  • Kim, Sun-Hee (Department of Biochemistry, Pusan National University School of Medicine)
  • 문현정 (부산대학교 의학전문대학원 의과학과 생화학교실) ;
  • 박소영 (부산대학교 의학전문대학원 의과학과 생화학교실) ;
  • 이수훈 (부산대학교 의학전문대학원 의과학과 생화학교실) ;
  • 강치덕 (부산대학교 의학전문대학원 의과학과 생화학교실) ;
  • 김선희 (부산대학교 의학전문대학원 의과학과 생화학교실)
  • Received : 2018.03.08
  • Accepted : 2018.05.29
  • Published : 2018.07.30
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Abstract

Autophagy is a complex signaling process and has been implicated in tumor suppression and anticancer therapy resistance. Autophagy can produce tumor-suppressive effect by inducing autophagic cell death, either in collaboration with apoptosis. In this current study, we found that celecoxib (CCB), a nonsteroidal anti-inflammatory drug (NSAID) with multifaceted effects, induced autophagy including enhanced LC3 conversion (LC3-I to LC3-II) and reduced autophagy substrate protein p62 level in multidrug-resistant (MDR) cancer cells. CCB sensitized human multidrug resistant (MDR) cancer cells to the ansamycin-based HSP90 inhibitor 17-allylamino-17-demethoxygeldanamycin (17-AAG), a benzoquinoid ansamycin, which causes the degradation of several oncogenic and signaling proteins, by inducing autophagic cell death and apoptosis. CCB significantly augmented 17-AAG-mediated level of LC3-II/LC-I, indicating the combined effect of 17-AAG and CCB on the induction of autophagy. Autophagic degradation of mutant p53 (mutp53) and activation of caspase-3 in 17-AAG-treated MDR cells were accelerated by CCB. Inhibition of caspase-3-mediated apoptotic pathway by Z-DEVD-FMK, a caspase-3 inhibitor, did not completely block CCB-induced cell death in MCF7-MDR cells. In addition, treatment of MDR cells with Z-DEVD-FMK failed to prevent activation of autophagy by combined treatment with 17-AAG and CCB. Based on our findings, the ability of clinically used drug CCB to induce autophagy has important implications for its development as a sensitizing agent in combination with Hsp90 inhibitor of MDR cancer.

오토파지(Autophagy, 자가포식)는 복합적인 신호과정으로, 암세포의 증식 억제 및 항암제에 대한 내성 획득의 상반적인 조절에도 관여한다. 오토파지의 암 억제 효과는 아팝토시스(apoptosis)와 상호협력으로 오토파지성세포 사멸의 유도에 기인된다. 본 연구에서는 NSAID 계열의 다기능 약물인 celecoxib (CCB)이 아팝토시스 및 오토파지의 복합적인 유도로, 항암제 다제내성(multidrug resistant, MDR) 암세포의 Hsp90 molecular chaperone inhibitor인 17-allylamino-17-demethoxygeldanamycin (17-AAG)에 대한 감수성을 증가시키는 활성이 있음을 밝혔다. 17-AAG 처리에 의한 항암제 다제내성 암세포의 변이형p53 분해 및 caspase-3 활성은 CCB 처리로 촉진되었다. MCF7-MDR세포에서 Z-DEVD-FMK 처리에 의한 caspase-3-매개의 아팝토시스 경로 차단은 CCB 유도의 세포 사멸을 완전히 차단시키지 못함을 알 수 있었으며, 또한 17-AAG과 CCB 병합 처리에 의한 오토파지 활성화는 Z-DEVD-FMK에 의해 방해되지 않는 것을 알 수 있었다. 본 연구의 결과를 토대로, CCB의 오토파지 유도 활성은 항암제 다제내성 암의 Hsp90 inhibitor에 대한 감수성 증가를 위한 약물 개발에, CCB가 효과적인 병용 약물로서 제안 될 수 있다.

Keywords

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