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Jung M, Han DJ, Ahn CH, Hong KO, Choi YS, Kim JS, Yoon HJ, Hong SD, Shin JA, Cho SD. In vitro induction of mitotic catastrophe as a therapeutic approach for oral cancer using the ethanolic extract of Juniperus squamata. Oncol Rep 2021; 45:103. [PMID: 33907849 DOI: 10.3892/or.2021.8054] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 03/26/2021] [Indexed: 11/06/2022] Open
Abstract
Mitotic catastrophe, a cell death mechanism characterized by abnormal mitosis, has been regarded as a therapeutic approach for the development of anti‑cancer drug candidates. The aim of the present study was to investigate the potential effect of the ethanolic extract of Juniperus squamata (EEJS) on the occurrence of mitotic catastrophe in human oral cancer cell lines. The effect of EEJS on the occurrence of mitotic catastrophe was evaluated by measuring cytotoxicity, observing phase‑contrast or transmission electron microscope findings, evaluating the appearance of microtubule or chromosome abnormalities, and detecting the phosphorylation of histone H3 (Ser10). The apoptotic effect of EEJS was assessed by detecting cleaved PARP, analyzing the sub‑G1 population, Annexin V‑FITC/PI double staining, western blot analysis, and the transient transfection of myeloid cell leukemia‑1 (Mcl‑1) overexpression vectors. EEJS treatment was effective in inhibiting cell proliferation in human oral cancer cell lines. EEJS resulted in the enrichment of enlarged multinucleated cells, the disturbance of microtubule formation, and increased phosphorylation of histone H3 (Ser10), which demonstrates the occurrence of mitotic catastrophe. Additionally, the multinucleated cells underwent apoptotic cell death in a cell context‑dependent manner, which was associated with the reduction of Mcl‑1 protein levels. Findings of the present study indicate that EEJS could be effective for treating human oral cancer by promoting mitotic catastrophe linked to apoptotic cell death.
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Affiliation(s)
- Minjung Jung
- Department of Oral Pathology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 03080, Republic of Korea
| | - Dae Jin Han
- School of Dentistry, Seoul National University, Seoul 03080, Republic of Korea
| | - Chi-Hyun Ahn
- Department of Oral Pathology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 03080, Republic of Korea
| | - Kyoung-Ok Hong
- Department of Oral Pathology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 03080, Republic of Korea
| | - Youn Soo Choi
- Department of Medicine, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
| | - Jun Sung Kim
- Research and Development Center, H‑MED Incorporated, Seoul 03761, Republic of Korea
| | - Hye-Jung Yoon
- Department of Oral Pathology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 03080, Republic of Korea
| | - Seong Doo Hong
- Department of Oral Pathology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 03080, Republic of Korea
| | - Ji-Ae Shin
- Department of Oral Pathology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 03080, Republic of Korea
| | - Sung-Dae Cho
- Department of Oral Pathology, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 03080, Republic of Korea
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