Korean Journal of Clinical Laboratory Science (대한임상검사과학회지)

Korean Society for Clinical Laboratory Science (대한임상검사과학회)
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Pulsed Electromagnetic Field Enhances Doxorubicin-induced Reduction in the Viability of MCF-7 Breast Cancer Cells

맥동 전자기장 처리에 의한 독소루비신 유도 유방암 세포 생존저하 촉진

  • Sung-Hun WOO (Department of Biomedical Laboratory Science, College of Software and Digital Healthcare Convergence, Yonsei University) ;
  • Yoon Suk KIM (Department of Biomedical Laboratory Science, College of Software and Digital Healthcare Convergence, Yonsei University)
  • 우성훈 (연세대학교 소프트웨어디지털헬스케어융합대학 임상병리학과) ;
  • 김윤석 (연세대학교 소프트웨어디지털헬스케어융합대학 임상병리학과)
  • Received : 2023.12.18
  • Accepted : 2024.01.11
  • Published : 2024.03.31
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Abstract

A pulsed electromagnetic field (PEMF) enhances the efficacy of several anticancer drugs. Doxorubicin (DOX) is an anticancer agent used to treat various malignancies, including breast cancer. This study examined whether a PEMF increases the anticancer effect of DOX on MCF-7 human breast cancer cells and elucidated the underlying mechanisms affected by PEMF stimulation in DOX-treated MCF-7 human breast cancer cells. A cotreatment with DOX and a PEMF potentiated the reduction in MCF-7 cell viability compared to the treatment with DOX alone. The PEMF elevated DOX-induced G1 arrest by affecting cyclin-dependent kinase 2 phosphorylation and the expression of G1 arrest-related molecules, including p53, p21, cyclin E2, and polo like kinase 1. In addition, PEMF increased the DOX-induced upregulation of proapoptotic proteins, such as Fas and Bcl-2-associated X, and the downregulation of antiapoptotic proteins, including myeloid leukemia 1 and survivin. PEMF promoted the DOX-induced activation of caspases-8, -9, and -7 and poly (adenosine diphosphate-ribose) polymerase cleavage in MCF-7 cells. In conclusion, PEMF enhances the anticancer activity in DOX-treated MCF-7 breast cancer cells by increasing G1 cell cycle arrest and caspase-dependent apoptosis. These findings highlight the potential use of a PEMF as an adjuvant treatment for DOX-based chemotherapy against breast cancer.

펄스 전자기장(pulsed electromagnetic field, PEMF)은 여러 항암제의 항암 효과를 향상시키는 것으로 알려져 있고 독소루비신(doxorubicin, DOX)은 유방암을 포함한 다양한 종류의 악성 종양을 치료하는 데 사용되는 항암제이다. 본 연구는 PEMF가 MCF-7 유방암 세포에 대한 DOX의 항암 효과 증진 여부를 조사하고 관련기전을 규명하기 위해 진행되었다. 본 연구팀은 DOX와 PEMF를 동시에 처리하면 DOX 단독 처리에 비해 MCF-7 유방암 세포의 생존율 감소가 더 커지는 것을 확인하였다. PEMF는 cyclin-dependent kinase 2의 인산화와 p53, p21, 사이클린 E2 및 polo like kinase 1의 단백질 발현에 영향을 주어 DOX 처리에 의한 G1 세포주기 정지를 더욱 증가시켰다. 또한, PEMF는 DOX 처리에 의한 Fas와 Bcl-2-associated X의 증가, myeloid leukemia 1과 survivin의 감소, 카스파제(caspase)-8/9/7의 활성 및 poly (adenosine diphosphate-ribose) polymerase 절단을 더욱 증가시켰다. 이러한 연구결과를 바탕으로, 본 연구팀은 PEMF는 DOX 처리에 의한 G1 세포주기 정지와 카스파제 의존적 세포자멸사를 더욱 증가시켜 DOX 처리에 의한 MCF-7 세포의 생존율 감소를 더욱 증진시킴을 확인할 수 있었다.

Keywords

Acknowledgement

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea, funded by the Ministry of Education (2018R1D1A1B07049134).

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