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Wang Y, Dong Y, Zhang W, Wang Y, Jao Y, Liu J, Zhang M, He H. AMPK/mTOR/p70S6K axis prevents apoptosis of Porphyromonas gingivalis-infected gingival epithelial cells via Bad Ser136 phosphorylation. Apoptosis 2023:10.1007/s10495-023-01839-z. [PMID: 37014579 DOI: 10.1007/s10495-023-01839-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/24/2023] [Indexed: 04/05/2023]
Abstract
Epithelial disruption is the initiation of most infectious disease. Regulation of epithelium apoptosis may play a key role in balance the survival competition between resident bacteria and host cells. The role of the mTOR/p70S6K pathway in preventing apoptosis of human gingival epithelial cells (hGECs) infected with Porphyromonas gingivalis (Pg) was investigated in order to further understand the survival strategy of the epithelial cells in during Pg infecting. hGECs was challenged with Pg for 4, 12, and 24 h. Additionally, hGECs was pretreated with LY294002 (PI3K signaling inhibitor) or Compound C (AMPK inhibitor) for 12 h and exposed them to Pg for 24 h. Subsequently, apoptosis was detected using flow cytometry, and expression and activity of Bcl-2, Bad, Bax, PI3K, AKT, AMPK, mTOR, and p70S6K proteins were analyzed using western blotting. Pg-infecting did not increase apoptosis of hGECs; but the expression ratio of Bad to Bcl-2 was increased after infecting. In contrast, BadSer136 phosphorylation was promoted, accompanied by a significant reduction of mTOR/p70S6K and PI3K/AKT signaling, along with the upregulation of AMPKThr172 signaling. Morrover, the PI3K inhibitor LY294002 promoted Pg-mediated reduction of mTOR/p70S6K expression, and the increase of AMPK signaling and BadSer136 phosphorylation rate, eventually decreasing apoptosis. While Compound C inhibited Pg-mediated activation of AMPK and downregulation of mTOR/p70S6K signaling, significantly reduced the BadSer136 phosphorylation rate, thereby increasing apoptosis. Thus, hGECs prevent apoptosis via an inherent cellular-homeostasis, pro-survival mechanism during Pg infection, the AMPK/mTOR/p70S6K pathway helps prevent apoptosis in hGECs infected with Pg by regulating BadSer136 phosphorylation.
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Affiliation(s)
- Yanchun Wang
- School and Hospital of Stomatology, Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Yilong Dong
- School of Medicine, Yunnan University, Kunming, Yunnan, People's Republic of China.
| | - Wenbo Zhang
- Department of Periodontitis, Affiliated Haikou Hospital, Xiangya Medical School, Central South University Hainan Provincial Stomatology Centre, Haikou, Hainan, People's Republic of China
| | - Yanmei Wang
- The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Yang Jao
- Institute of Biomedical Engineering, Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Jianjun Liu
- Institute of Biomedical Engineering, Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Mingzhu Zhang
- School and Hospital of Stomatology, Kunming Medical University, Kunming, Yunnan, People's Republic of China
| | - Hongbing He
- School and Hospital of Stomatology, Kunming Medical University, Kunming, Yunnan, People's Republic of China.
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Jhou AJ, Chang HC, Hung CC, Lin HC, Lee YC, Liu WT, Han KF, Lai YW, Lin MY, Lee CH. Chlorpromazine, an antipsychotic agent, induces G2/M phase arrest and apoptosis via regulation of the PI3K/AKT/mTOR-mediated autophagy pathways in human oral cancer. Biochem Pharmacol 2021; 184:114403. [PMID: 33388284 DOI: 10.1016/j.bcp.2020.114403] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/26/2020] [Accepted: 12/29/2020] [Indexed: 02/08/2023]
Abstract
Chlorpromazine (CPZ), an FDA-approved phenothiazine derivative used to treat schizophrenia and other psychiatric disorders, has been demonstrated to have potential anti-tumor effects. However, the potential effects of CPZ on human oral cancer cells and the underlying molecular mechanisms remain unknown. In this study, treatment of human oral cancer cells with CPZ inhibited their proliferation and induced G2/M phase arrest. Treatment with CPZ induced apoptosis through the extrinsic death receptor and the intrinsic mitochondrial pathways. In addition, the induction of autophagy was observed by the formation of autophagosomes, the expression of autophagy-related proteins and activation of the PI3K/Akt/mTOR/p70S6K pathway. The CPZ-induced cell death was reversed by the pan-caspase inhibitor Z-VAD-FMK, by the autophagy inhibitor 3-MA and by the knockdown of LC3B using a shRNA (shLC3B), suggesting that autophagy promoted CPZ-induced apoptosis. Finally, CPZ significantly suppressed tumor growth in both a zebrafish oral cancer xenotransplantation model and in a murine model of 4-nitroquinoline-1-oxide (4NQO)-induced oral cancer. Overall, this evidence demonstrated that CPZ is a novel promising strategy for the treatment of oral cancer.
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Affiliation(s)
- An-Jie Jhou
- Department of Pharmacology, Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Hao-Chiun Chang
- Department of Orthopaedics, MacKay Memorial Hospital, Taipei 10449, Taiwan
| | - Chih-Chang Hung
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Han-Chen Lin
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Department of Medical Research, Kaohsiung Medical University Hospital, Department of Anatomy, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Yi-Chen Lee
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Department of Medical Research, Kaohsiung Medical University Hospital, Department of Anatomy, School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Wang-Ta Liu
- Department of Biotechnology, Kaohsiung Medical University, Kaohsiung 80708 Taiwan
| | - Kuang-Fen Han
- Department of Nursing, Min-Hwei Junior College of Health Care Management, Tainan 73658, Taiwan
| | - Yu-Wei Lai
- Division of Urology, Taipei City Hospital Renai Branch, Department of Urology, National Yang-Ming University School of Medicine, Taipei 11221, Taiwan
| | - Mei-Ying Lin
- Community Health Promotion Center, Kaohsiung Municipal Ci-Jin Hospital, Kaohsiung 80708, Taiwan
| | - Chien-Hsing Lee
- Department of Pharmacology, Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Pharmacology, School of Medicine; School of Post-Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan.
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Wang SW, Lee CH, Lin MS, Chi CW, Chen YJ, Wang GS, Liao KW, Chiu LP, Wu SH, Huang DM, Chen L, Shen YS. ZnO Nanoparticles Induced Caspase-Dependent Apoptosis in Gingival Squamous Cell Carcinoma through Mitochondrial Dysfunction and p70S6K Signaling Pathway. Int J Mol Sci 2020; 21:ijms21051612. [PMID: 32111101 PMCID: PMC7084801 DOI: 10.3390/ijms21051612] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/07/2020] [Accepted: 02/20/2020] [Indexed: 12/17/2022] Open
Abstract
Zinc oxide nanoparticles (ZnO-NPs) are increasingly used in sunscreens, food additives, pigments, rubber manufacture, and electronic materials. Several studies have shown that ZnO-NPs inhibit cell growth and induce apoptosis by the production of oxidative stress in a variety of human cancer cells. However, the anti-cancer property and molecular mechanism of ZnO-NPs in human gingival squamous cell carcinoma (GSCC) are not fully understood. In this study, we found that ZnO-NPs induced growth inhibition of GSCC (Ca9-22 and OECM-1 cells), but no damage in human normal keratinocytes (HaCaT cells) and gingival fibroblasts (HGF-1 cells). ZnO-NPs caused apoptotic cell death of GSCC in a concentration-dependent manner by the quantitative assessment of oligonucleosomal DNA fragmentation. Flow cytometric analysis of cell cycle progression revealed that sub-G1 phase accumulation was dramatically induced by ZnO-NPs. In addition, ZnO-NPs increased the intracellular reactive oxygen species and specifically superoxide levels, and also decreased the mitochondrial membrane potential. ZnO-NPs further activated apoptotic cell death via the caspase cascades. Importantly, anti-oxidant and caspase inhibitor clearly prevented ZnO-NP-induced cell death, indicating the fact that superoxide-induced mitochondrial dysfunction is associated with the ZnO-NP-mediated caspase-dependent apoptosis in human GSCC. Moreover, ZnO-NPs significantly inhibited the phosphorylation of ribosomal protein S6 kinase (p70S6K kinase). In a corollary in vivo study, our results demonstrated that ZnO-NPs possessed an anti-cancer effect in a zebrafish xenograft model. Collectively, these results suggest that ZnO-NPs induce apoptosis through the mitochondrial oxidative damage and p70S6K signaling pathway in human GSCC. The present study may provide an experimental basis for ZnO-NPs to be considered as a promising novel anti-tumor agent for the treatment of gingival cancer.
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Affiliation(s)
- Shih-Wei Wang
- Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan;
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Chien-Hsing Lee
- Department of Pharmacology, Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan;
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 807, Taiwan
| | - Ming-Shen Lin
- Department of Water Resources and Environmental Engineering, Tamkang University, New Taipei City 251, Taiwan;
| | - Chih-Wen Chi
- Department of Nursing, MacKay Medical College, New Taipei City 252, Taiwan;
- Department of Medical Research, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Yu-Jen Chen
- MacKay Junior College of Medicine, Nursing, and Management, Taipei 112, Taiwan;
- Department of Radiation Oncology, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Guo-Shou Wang
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan; (G.-S.W.); (K.-W.L.)
- Department of Orthopaedics, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Kuang-Wen Liao
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan; (G.-S.W.); (K.-W.L.)
- Institute of Molecular Medicine and Bioengineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Li-Pin Chiu
- General Education Center, University of Taipei, Taipei 100, Taiwan;
- Division of General Surgery, Taipei City Hospital, Taipei 103, Taiwan
| | - Shu-Hui Wu
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli County 350, Taiwan;
| | - Dong-Ming Huang
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli County 350, Taiwan;
- Correspondence: (D.-M.H.); (L.C.); (Y.-S.S.); Tel.: +886-37-246-166 (ext. 38105) (D.-M.H.); +886-2-2621-5656 (ext. 2682) (L.C.); +886-2-2636-0303 (ext. 1422) (Y.-S.S.)
| | - Luke Chen
- Department of Water Resources and Environmental Engineering, Tamkang University, New Taipei City 251, Taiwan;
- Correspondence: (D.-M.H.); (L.C.); (Y.-S.S.); Tel.: +886-37-246-166 (ext. 38105) (D.-M.H.); +886-2-2621-5656 (ext. 2682) (L.C.); +886-2-2636-0303 (ext. 1422) (Y.-S.S.)
| | - Yung-Shuen Shen
- Institute of Geriatric Welfare Technology and Science, MacKay Medical College, New Taipei City 252, Taiwan
- Correspondence: (D.-M.H.); (L.C.); (Y.-S.S.); Tel.: +886-37-246-166 (ext. 38105) (D.-M.H.); +886-2-2621-5656 (ext. 2682) (L.C.); +886-2-2636-0303 (ext. 1422) (Y.-S.S.)
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