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Kato M, Ota A, Ono T, Karnan S, Hyodo T, Rahman ML, Hasan MN, Onda M, Kondo S, Ito K, Furuhashi A, Hayashi T, Konishi H, Tsuzuki S, Hosokawa Y, Kazaoka Y. PDZ-binding kinase inhibitor OTS514 suppresses the proliferation of oral squamous carcinoma cells. Oral Dis 2024; 30:223-234. [PMID: 36799330 DOI: 10.1111/odi.14533] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 12/28/2022] [Accepted: 02/09/2023] [Indexed: 02/18/2023]
Abstract
OBJECTIVE PDZ-binding kinase (PBK) has been reported as a poor prognostic factor and is a promising molecular target for anticancer therapeutics. Here, we aimed to investigate the effect of specific PBK inhibitor OTS514 on the survival of OSCC cells. METHODS Four OSCC cell lines (HSC-2, HSC-3, SAS, and OSC-19) were used to examine the effect of OTS514 on cell survival and apoptosis. DNA microarray analysis was conducted to investigate the effect of OTS514 on gene expression in OSCC cells. Gene set enrichment analysis was performed to identify molecular signatures related to the antiproliferative effect of OTS514. RESULTS OTS514 decreased the cell survival of OSCC cells dose-dependently, and administration of OTS514 readily suppressed the HSC-2-derived tumor growth in immunodeficient mice. Treatment with OTS514 significantly increased the number of apoptotic cells and caspase-3/7 activity. Importantly, OTS514 suppressed the expression of E2F target genes with a marked decrease in protein levels of E2F1, a transcriptional factor. Moreover, TP53 knockdown attenuated OTS514-induced apoptosis. CONCLUSION OTS514 suppressed the proliferation of OSCC cells by downregulating the expression of E2F target genes and induced apoptosis by mediating the p53 signaling pathway. These results highlight the clinical application of PBK inhibitors in the development of molecular-targeted therapeutics against OSCC.
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Affiliation(s)
- Mikako Kato
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Akinobu Ota
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Takayuki Ono
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Sivasundaram Karnan
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Toshinori Hyodo
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Md Lutfur Rahman
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Muhammad Nazmul Hasan
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Maho Onda
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Sayuri Kondo
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Kunihiro Ito
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Akifumi Furuhashi
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Tomio Hayashi
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
| | - Hiroyuki Konishi
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Shinobu Tsuzuki
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Yoshitaka Hosokawa
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Japan
| | - Yoshiaki Kazaoka
- Department of Oral and Maxillofacial Surgery, Aichi Medical University Hospital, Nagakute, Japan
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Onda M, Ota A, Ito K, Ono T, Karnan S, Kato M, Kondo S, Furuhashi A, Hayashi T, Hosokawa Y, Kazaoka Y. Inhibition of VEGFR2 and EGFR signaling cooperatively suppresses the proliferation of oral squamous cell carcinoma. Cancer Med 2023; 12:16416-16430. [PMID: 37341071 PMCID: PMC10469792 DOI: 10.1002/cam4.6282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 06/05/2023] [Accepted: 06/12/2023] [Indexed: 06/22/2023] Open
Abstract
BACKGROUND Epidermal growth factor receptor (EGFR) is frequently overexpressed in oral squamous cell carcinoma (OSCC), and EGFR-targeting therapeutics have been widely employed to treat patients with a variety of carcinomas including OSCC. Here, we aimed to investigate alternative signaling for OSCC survival under the disruption of EGFR signaling. METHODS OSCC cell lines, namely HSC-3 and SAS, were utilized to investigate how EGFR disruption affects cell proliferation. Gene set enrichment analysis was performed to examine how EGFR disruption affects oncogenic signaling in OSCC cells. Disruption of KDR gene was performed using CRISPR/Cas9 techniques. A VEGFR inhibitor, vatalanib was used to research the impact of VEGFR inhibition on OSCC survival. RESULTS EGFR disruption significantly decreased the proliferation and oncogenic signaling including Myc and PI3K-Akt, in OSCC cells. Chemical library screening assays revealed that VEGFR inhibitors continued to inhibit the proliferation of EGFR-deficient OSCC cells. In addition, CRISPR-mediated disruption of KDR/VEGFR2 retarded OSCC cell proliferation. Furthermore, combined erlotinib-vatalanib treatment exhibited a more potent anti-proliferative effect on OSCC cells, compared to either monotherapy. The combined therapy effectively suppressed the phosphorylation levels of Akt but not p44/42. CONCLUSION VEGFR-mediated signaling would be an alternative signaling pathway for the survival of OSCC cells under the disruption of EGFR signaling. These results highlight the clinical application of VEGFR inhibitors in the development of multi-molecular-targeted therapeutics against OSCC.
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Affiliation(s)
- Maho Onda
- Department of Oral and Maxillofacial SurgeryAichi Medical University HospitalNagakuteJapan
| | - Akinobu Ota
- Department of BiochemistryAichi Medical University School of MedicineNagakuteJapan
- Department of Food and Nutritional EnvironmentCollege of Human Life and EnvironmentKinjo Gakuin UniversityNagoyaJapan
| | - Kunihiro Ito
- Department of Oral and Maxillofacial SurgeryAichi Medical University HospitalNagakuteJapan
| | - Takayuki Ono
- Department of Oral and Maxillofacial SurgeryAichi Medical University HospitalNagakuteJapan
| | - Sivasundaram Karnan
- Department of BiochemistryAichi Medical University School of MedicineNagakuteJapan
| | - Mikako Kato
- Department of Oral and Maxillofacial SurgeryAichi Medical University HospitalNagakuteJapan
| | - Sayuri Kondo
- Department of Oral and Maxillofacial SurgeryAichi Medical University HospitalNagakuteJapan
| | - Akifumi Furuhashi
- Department of Oral and Maxillofacial SurgeryAichi Medical University HospitalNagakuteJapan
| | - Tomio Hayashi
- Department of Oral and Maxillofacial SurgeryAichi Medical University HospitalNagakuteJapan
| | - Yoshitaka Hosokawa
- Department of BiochemistryAichi Medical University School of MedicineNagakuteJapan
| | - Yoshiaki Kazaoka
- Department of Oral and Maxillofacial SurgeryAichi Medical University HospitalNagakuteJapan
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Plumbagin Enhances the Radiosensitivity of Tongue Squamous Cell Carcinoma Cells via Downregulating ATM. JOURNAL OF ONCOLOGY 2021; 2021:8239984. [PMID: 34484337 PMCID: PMC8416389 DOI: 10.1155/2021/8239984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 08/18/2021] [Indexed: 11/18/2022]
Abstract
This study was designed to investigate whether plumbagin (PL) could sensitize ionizing radiation (IR) in tongue squamous cell carcinoma (TSCC) cells and its possible mechanisms. Cell proliferation and combination index analysis was based on MTT and colony formation assay. Flow cytometry was applied to analyze the cell cycle distribution and apoptosis after the treatment of PL and/or IR. RT-PCR was used to examine the gene expression level of ataxia telangiegatasiata muted (ATM) and nuclear factor kappa beta (NF-κB) after various treatment groups. Western blot was used to examine the protein level of ATM and NF-κB as well as their phosphorylation level. PL enhances the cytotoxicity of IR in TSCC cells. Combination index was <1 which represents a synergistic effect. Combined PL and IR promoted G2/M arrest and apoptosis which could be reversed by ATM activator chloroquine phosphate. ATM and NF-κB were both inhibited by PL and IR combination. PL can efficiently enhance the radiosensitivity of TSCC cells by inducing G2/M arrest and apoptosis via downregulating ATM.
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Yin Z, Zhang J, Chen L, Guo Q, Yang B, Zhang W, Kang W. Anticancer Effects and Mechanisms of Action of Plumbagin: Review of Research Advances. BIOMED RESEARCH INTERNATIONAL 2020; 2020:6940953. [PMID: 33344645 PMCID: PMC7725562 DOI: 10.1155/2020/6940953] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/03/2020] [Accepted: 11/19/2020] [Indexed: 12/14/2022]
Abstract
Plumbagin (PLB), a natural naphthoquinone constituent isolated from the roots of the medicinal plant Plumbago zeylanica L., exhibited anticancer activity against a variety of cancer cell lines including breast cancer, hepatoma, leukemia, melanoma, prostate cancer, brain tumor, tongue squamous cell carcinoma, esophageal cancer, oral squamous cell carcinoma, lung cancer, kidney adenocarcinoma, cholangiocarcinoma, gastric cancer, lymphocyte carcinoma, osteosarcoma, and canine cancer. PLB played anticancer activity via many molecular mechanisms, such as targeting apoptosis, autophagy pathway, cell cycle arrest, antiangiogenesis pathway, anti-invasion, and antimetastasis pathway. Among these signaling pathways, the key regulatory genes regulated by PLB were NF-kβ, STAT3, and AKT. PLB also acted as a potent inducer of reactive oxygen species (ROS), suppressor of cellular glutathione, and novel proteasome inhibitor, causing DNA double-strand break by oxidative DNA base damage. This review comprehensively summarizes the anticancer activity and mechanism of PLB.
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Affiliation(s)
- Zhenhua Yin
- Zhengzhou Key Laboratory of Medicinal Resources Research, Huanghe Science and Technology College, Zhengzhou 450063, China
- Henan Joint International Research Laboratory of Drug Discovery of Small Molecules, Zhengzhou 450063, China
| | - Juanjuan Zhang
- Zhengzhou Key Laboratory of Medicinal Resources Research, Huanghe Science and Technology College, Zhengzhou 450063, China
- Henan Joint International Research Laboratory of Drug Discovery of Small Molecules, Zhengzhou 450063, China
| | - Lin Chen
- Zhengzhou Key Laboratory of Medicinal Resources Research, Huanghe Science and Technology College, Zhengzhou 450063, China
- Henan Joint International Research Laboratory of Drug Discovery of Small Molecules, Zhengzhou 450063, China
| | - Qingfeng Guo
- Zhengzhou Key Laboratory of Medicinal Resources Research, Huanghe Science and Technology College, Zhengzhou 450063, China
- Henan Joint International Research Laboratory of Drug Discovery of Small Molecules, Zhengzhou 450063, China
| | - Baocheng Yang
- Zhengzhou Key Laboratory of Medicinal Resources Research, Huanghe Science and Technology College, Zhengzhou 450063, China
- Henan Joint International Research Laboratory of Drug Discovery of Small Molecules, Zhengzhou 450063, China
| | - Wei Zhang
- Zhengzhou Key Laboratory of Medicinal Resources Research, Huanghe Science and Technology College, Zhengzhou 450063, China
| | - Wenyi Kang
- Zhengzhou Key Laboratory of Medicinal Resources Research, Huanghe Science and Technology College, Zhengzhou 450063, China
- National R&D Center for Edible Fungus Processing Technology, Henan University, Kaifeng 475004, China
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5
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Xin Y, Li S, Jiang Q, Hu F, He Y, Zhang J. Establishment of a Jaw Fibrosarcoma Patient-Derived Xenograft and Evaluation of the Tumor Suppression Efficacy of Plumbagin Against Jaw Fibrosarcoma. Front Oncol 2020; 10:1479. [PMID: 32974176 PMCID: PMC7481444 DOI: 10.3389/fonc.2020.01479] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Accepted: 07/10/2020] [Indexed: 11/17/2022] Open
Abstract
Background: Head and neck fibrosarcoma is a rare malignant tumor, accounting for about 1% of all head and neck tumors. It can also occur in the jaw bone, for which surgical resection is the main treatment but the recurrence rate is high and the prognosis is usually poor. Due to the lack of models mimicking the biological characteristics of the tumor, there is little progress in the research of the pathogenesis and treatment of fibrosarcoma. Therefore, there is an urgent need to explore a high-fidelity model that can reflect the biological characteristics of fibrosarcoma for the sake of improving the therapeutic outcome and prognosis, and preventing recurrence. Patient-derived xenografts (PDX) may more accurately reflect the human disease, and is an attractive platform to study disease biology and develop treatments and biomarkers. In this study we describe the establishment of jaw fibrosarcoma PDX models and compare PDX tumors to those of human origin. Methods: Tumor biopsies from a patient with jaw fibrosarcoma were implanted in immunodeficient mice. Primary and PDX tumors were characterized extensively by histology, immunohistochemistry and humanized identification. Based on the finding of our previous preliminary research that plumbagin had an anti-tumor effect against head and neck cancer, we used this model in the present study to evaluate the anti-tumor effect of plumbagin on jaw fibrosarcoma. Results: The established PDX model maintained the histological and immunohistochemical characteristics of the primary tumor. Plumbagin significantly inhibited the tumor growth in the jaw fibrosarcoma PDX model. Conclusion: We successfully established a PDX model of jaw fibrosarcoma and demonstrated that this PDX model preserved the important molecular characteristics of the human primary tumor, thus providing a powerful tool for treatment research and new drug development of jaw fibrosarcoma. In addition, plumbagin was found to have an inhibitory effect on the growth of PDX modeled jaw fibrosarcoma, which provides a preliminary research basis for its clinical application.
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Affiliation(s)
- Yuqi Xin
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, China.,Medical College, Nanchang University, Nanchang, China
| | - Shiya Li
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, China.,Medical College, Nanchang University, Nanchang, China
| | - Qingkun Jiang
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, China.,Medical College, Nanchang University, Nanchang, China
| | - Fangling Hu
- Department of Otolaryngology Head and Neck Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yuanqiao He
- Laboratory Animal Science Center of Nanchang University, Nanchang, China.,Key Laboratory of Experimental Animals of Jiangxi, Nanchang, China.,Nanchang Royo Biotechnology, Nanchang, China
| | - Jie Zhang
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, China
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Mancilla IA, Coatti GC, Biazi BI, Zanetti TA, Baranoski A, Marques LA, Corveloni AC, Lepri SR, Mantovani MS. Molecular pathways related to the control of proliferation and cell death in 786-O cells treated with plumbagin. Mol Biol Rep 2019; 46:6071-6078. [PMID: 31456160 DOI: 10.1007/s11033-019-05042-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 08/20/2019] [Indexed: 12/13/2022]
Abstract
Plumbagin (PLB) is a phytochemical being used for centuries in traditional medicines. Recently, its capacity to inhibit the development of human tumors has been observed, through the induction of apoptosis, cell cycle arrest, and inhibition of angiogenesis and metastasis. Here we evaluated the mechanism of action of PLB in the kidney adenocarcinoma 786-O cell line, which are metabolizing cells important for toxicology studies. After the treatment with PLB, we observed increased apoptosis and cell cycle arrest in S and G2/M phases, starting at 5 µM. In addition, PLB was cytotoxic, genotoxic and induced loss of cell membrane integrity. Regarding gene expression, treatment with 7.5 µM PLB reduced the amount of MTOR, BCL2 and ATM transcripts, and increased CDKN1A (p21) transcripts. Phosphorylation levels of yH2AX was increased and MDM2 protein level was reduced following the treatment with PLB, demonstrating its genotoxic effect. Our results suggest that PLB acts in molecular pathways related to the control of proliferation and cell death in 786-O cells.
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Affiliation(s)
- Igor Alves Mancilla
- Department of General Biology, Center of Biological Sciences, Londrina State University-UEL, Rodovia Celso Garcia Cid, Pr 445 km 380, Londrina, Paraná, Brazil
| | - Giuliana Castello Coatti
- Human Genome and Stem-Cell Research Center. Institute of Biosciences, University of São Paulo-USP, Rua do Matão-Travessa 13, n. 106, São Paulo, Brazil
| | - Bruna Isabela Biazi
- Department of General Biology, Center of Biological Sciences, Londrina State University-UEL, Rodovia Celso Garcia Cid, Pr 445 km 380, Londrina, Paraná, Brazil
| | - Thalita Alves Zanetti
- Department of General Biology, Center of Biological Sciences, Londrina State University-UEL, Rodovia Celso Garcia Cid, Pr 445 km 380, Londrina, Paraná, Brazil
| | - Adrivanio Baranoski
- Department of General Biology, Center of Biological Sciences, Londrina State University-UEL, Rodovia Celso Garcia Cid, Pr 445 km 380, Londrina, Paraná, Brazil
| | - Lilian Areal Marques
- Department of General Biology, Center of Biological Sciences, Londrina State University-UEL, Rodovia Celso Garcia Cid, Pr 445 km 380, Londrina, Paraná, Brazil
| | - Amanda Cristina Corveloni
- Department of General Biology, Center of Biological Sciences, Londrina State University-UEL, Rodovia Celso Garcia Cid, Pr 445 km 380, Londrina, Paraná, Brazil
| | - Sandra Regina Lepri
- Department of General Biology, Center of Biological Sciences, Londrina State University-UEL, Rodovia Celso Garcia Cid, Pr 445 km 380, Londrina, Paraná, Brazil
| | - Mario Sergio Mantovani
- Department of General Biology, Center of Biological Sciences, Londrina State University-UEL, Rodovia Celso Garcia Cid, Pr 445 km 380, Londrina, Paraná, Brazil.
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Tripathi SK, Panda M, Biswal BK. Emerging role of plumbagin: Cytotoxic potential and pharmaceutical relevance towards cancer therapy. Food Chem Toxicol 2019; 125:566-582. [PMID: 30685472 DOI: 10.1016/j.fct.2019.01.018] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 01/04/2019] [Accepted: 01/20/2019] [Indexed: 12/24/2022]
Abstract
Plumbagin is a naphthoquinone derived yellow crystalline phytochemical. Plumbagin has a wide range of biological effects including cytotoxicity against cancer cells both in vitro and in vivo. Due to the pleiotropic nature of plumbagin, it shows the anticancer effect by targeting several molecular mechanisms including apoptosis and autophagic pathways, cell cycle arrest, anti-angiogenic pathways, anti-invasion and anti-metastasis pathways. Among many signaling pathways the key regulatory genes regulated by plumbagin are NF-kβ, STAT3, and AKT, etc. Plumbagin is also a potent inducer of ROS, suppressor of cellular glutathione, and causes DNA strand break by oxidative DNA base damages. In vivo studies suggested that plumbagin significantly reduces the tumor weight and volume in dose-dependent manner without any side effects in tested model organisms. Another exciting aspect of plumbagin is the ability to re-sensitize the chemo and radioresistant cancer cells when used in combination or alone. Nano encapsulation of plumbagin overcomes the poor water solubility and bioavailability obstacles, enhancing the pharmaceutical relevance with better therapeutic efficacy. Moreover, plumbagin can be introduced as a future phytotherapeutic anticancer drug after fully satisfied preclinical and clinical trials.
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Affiliation(s)
- Surya Kant Tripathi
- Cancer Drug Resistance Laboratory, Department of Life Science, National Institute of Technology Rourkela, 769008, Sundergarh, Odisha, India
| | - Munmun Panda
- Cancer Drug Resistance Laboratory, Department of Life Science, National Institute of Technology Rourkela, 769008, Sundergarh, Odisha, India
| | - Bijesh K Biswal
- Cancer Drug Resistance Laboratory, Department of Life Science, National Institute of Technology Rourkela, 769008, Sundergarh, Odisha, India.
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Liu Y, Cai Y, He C, Chen M, Li H. Anticancer Properties and Pharmaceutical Applications of Plumbagin: A Review. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2017; 45:423-441. [DOI: 10.1142/s0192415x17500264] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
It has been shown that plumbagin, a bioactive naphthoquinone isolated from three major plant families viz. Plumbaginaceae, Ebenceae and Droseraceae, definitively exhibits anticancer potential in diverse cancer cells both in vitro and in vivo. Plumbagin shows antineoplastic effects via multi-channel molecular mechanisms, including the induction of apoptosis and autophagy, the disruption of the cell cycle, the inhibition of invasion and metastasis, and anti-angiogenesis. Plumbagin inhibits the growth of cancer cells mainly through the modulation of the signals of PI3K/Akt/mTOR, AMPK, Ras, and so on. The pharmaceutical applications of plumbagin combined with nanocarriers to achieve better therapeutic efficiency are discussed in this review Among them, liposomes, nanoparticles, microspheres, micelles, and nisosomes are used in cancer treatment. The anticancer study of plumbagin in vivo is also summarized in this review. On the whole, we aim to review the research progress of plumbagin both in pharmacological and pharmaceutical filed, which may provide some reference for further research of plumbagin.
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Affiliation(s)
- Yuling Liu
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, P.R. China
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, P.R. China
| | - Yuee Cai
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, P.R. China
| | - Chengwei He
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, P.R. China
| | - Meiwan Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, P.R. China
| | - Hui Li
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, P.R. China
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Wu H, Dai X, Wang E. Plumbagin inhibits cell proliferation and promotes apoptosis in multiple myeloma cells through inhibition of the PI3K/Akt-mTOR pathway. Oncol Lett 2016; 12:3614-3618. [PMID: 27900044 DOI: 10.3892/ol.2016.5048] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 04/22/2016] [Indexed: 12/31/2022] Open
Abstract
Plumbagin is the primary component of the traditional Chinese medicine Baihua Dan, and possesses anti-infection and anticancer effects with the ability to enhance the sensitivity of tumor cells to radiation therapy. The present study aimed to investigate the potential anticancer effect and mechanism of plumbagin on multiple myeloma (MM) cells. Human MM OPM1 cells were treated with plumbagin, and its impact on cell viability, cytotoxicity, apoptosis and caspase-3 activity was examined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, lactate dehydrogenase leakage, flow cytometry and colorimetric assays. In addition, the protein expression levels of phosphoinositide 3-kinase, phosphorylated (p)-Akt and p-mammalian target of rapamycin (mTOR) in OPM1 cells were analyzed by western blotting. The results demonstrated that plumbagin treatment inhibited cell viability, increased cell cytotoxicity, activated cell apoptosis and promoted caspase-3 activity in the OPM1 cells. Furthermore, pretreatment of plumbagin significantly suppressed PI3K, p-Akt and p-mTOR protein expression levels in the OPM1 cells. In conclusion, the present study indicates that plumbagin inhibits cell proliferation and promotes apoptosis in MM cells through inhibition of PI3K/Akt-mTOR expression.
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Affiliation(s)
- Hongwei Wu
- Department of Hematology, The First Affiliated Hospital of Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
| | - Xiaozhen Dai
- Department of Biological and Medical Sciences, Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
| | - Enren Wang
- Department of Neuromedicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, Sichuan 610500, P.R. China
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Zhang S, Li D, Yang JY, Yan TB. Plumbagin protects against glucocorticoid-induced osteoporosis through Nrf-2 pathway. Cell Stress Chaperones 2015; 20:621-9. [PMID: 25939783 PMCID: PMC4463920 DOI: 10.1007/s12192-015-0585-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/14/2015] [Accepted: 03/18/2015] [Indexed: 11/25/2022] Open
Abstract
Long-term and high-dose glucocorticoids (GCs) supplementation has been linked to osteoporosis. In this study, we studied the protective role of plumbagin against GC-induced cell damage in MC3T3-E1 cells. The effect of dexamethasone (DEX) and plumbagin on cell viability was determined. DEX showed as IC-50 value of 95 μM. Further, 10 μM plumbagin treatment effectively ameliorated DEX-induced cell death by increasing the cell viability to 92 %. A further effect of plumbagin on DEX-induced oxidative stress was determined through reactive oxygen species (ROS) level, lipid peroxide content, and antioxidant status. Nrf-2 nuclear localization was analyzed through immunofluorescence. Protein expression of redox regulator Nrf-2 and their target genes HO-1 and NQO1 and osteogenic markers (OCN, OPN Runx-2) were determined by Western blot. Apoptotic effect was analyzed by mitochondrial membrane potential and caspase activities (3, 8, and 9). The results showed that DEX treatment showed a significant increase in oxidative stress through increased ROS levels and downregulation of cytoprotective antioxidant proteins and antioxidant enzyme activities. Further DEX treatment downregulated the osteogenic markers and upregulated apoptosis through decreased mitochondrial membrane potential and upregulation of caspase activities. Plumbagin treatment significantly reversed the levels of oxidative stress and apoptotic markers and protected against DEX-induced cell damage. Further, plumbagin treatment significantly improved the expression of osteogenic markers compared to DEX treatment. In conclusion, the present study shows that plumbagin offers significant protective role against DEX-induced cellular damage via regulating oxidative stress, apoptosis, and osteogenic markers.
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Affiliation(s)
- Shuai Zhang
- />Department of Orthopedics, Qilu Hospital of Shandong University, No. 107 Wenhuaxi Road, Jinan, Shandong 250012 China
| | - Dong Li
- />Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021 China
| | - Jing-Yan Yang
- />Department of Pathology, The Second Hospital of Shandong University, Jinan, Shandong 250033 China
| | - Ting-Bin Yan
- />Department of Orthopedics, Qilu Hospital of Shandong University, No. 107 Wenhuaxi Road, Jinan, Shandong 250012 China
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