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Machado Júnior RJ, Camilli JC, Basting RT, Zago PMW, Sousa IMDO, Buglio KE, Ruiz ALTG, Carvalho PRN, Carvalho JED, Saad STO, Foglio MA. Cytoprotective effect of Fridericia chica (Bonpl.) L.G. Lohmann extract associated with geranylgeraniol enriched-fraction from Bixa orellana L. on epithelial cells treated with bisphosphonate. Nat Prod Res 2022:1-6. [PMID: 36226767 DOI: 10.1080/14786419.2022.2131782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Bisphosphonates are drugs used to treat bone disorders. The chronic use of bisphosphonates is associated with the occurrence of medication-related osteonecrosis of the jaw (MRONJ). Previous data reported the positive effects of Geranylgeraniol on different cell types treated with Bisphosphonates. Foregoing work done by our research group demonstrated the wound healing capacity of Fridericia chica (Bonpl.) L.G.Lohmann standardized ethanol extract. Herein in vitro cytoprotective synergistic effect of the association of F. chica extract associated with an enriched geranylgeraniol fraction on keratinocytes exposed to zoledronic acid is reported. An association of F. chica at 1 and 5 µg/mL with geranylgeraniol at 15 µg/mL, increased cell viability by 73.5% and 71.1%, respectively. This treatment did not increase tumor cells viability; whereas the clonogenic potential assessment showed that, the association with F. chica (5 µg/mL) reversed the effects of zoledronic acid on the cells. This study provides data for a potential treatment for MRONJ.
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Affiliation(s)
| | - Júlia C Camilli
- Faculty of Pharmaceutical Sciences, University of Campinas, Campinas, Brazil
| | | | | | | | - Kaio Eduardo Buglio
- Faculty of Pharmaceutical Sciences, University of Campinas, Campinas, Brazil
| | - Ana Lúcia T G Ruiz
- Faculty of Pharmaceutical Sciences, University of Campinas, Campinas, Brazil
| | | | | | - Sara T O Saad
- Hematology and Hemotherapy Center (HEMOCENTRO), State University of Campinas (UNICAMP), Campinas, Brazil
| | - Mary Ann Foglio
- Faculty of Pharmaceutical Sciences, University of Campinas, Campinas, Brazil
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2
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Park YE, Bava U, Lin JM, Cornish J, Naot D, Reid IR. Bone-Bound Bisphosphonates Inhibit Proliferation of Breast Cancer Cells. Calcif Tissue Int 2019; 105:497-505. [PMID: 31324954 DOI: 10.1007/s00223-019-00590-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 07/12/2019] [Indexed: 12/31/2022]
Abstract
Bisphosphonates are used in treating patients with breast cancer. In vitro studies have shown that bisphosphonates act directly on tumour cells, inhibiting cell proliferation and inducing apoptosis. In most such studies, drugs were added to culture media exposing cells to high bisphosphonate concentrations in solution. However, since bisphosphonates bind to bone hydroxyapatite with high affinity and remain bound for very long periods of time, these experimental systems are not an optimal model for the action of the drugs in vivo. The aim of this study was to determine whether bone-bound zoledronate has direct effects on adjacent breast cancer cells. Bone slices were pre-incubated with bisphosphonate solutions, washed, and seeded with cells of the breast cancer cell lines, MCF7 or MDA-MB-231. Proliferation was assessed by cell counts and thymidine incorporation for up to 72 h. Inhibition of the mevalonate pathway was tested by measuring the levels of unprenylated Rap1A, and apoptosis was examined by the presence of cleaved caspase-8 on western blots. The proliferation rate of breast cancer cells on zoledronate-treated bone was significantly lower compared to cells on control bone. Other bisphosphonates showed a similar inhibitory effect, with an order of potency similar to their clinical potencies. Unprenylated Rap1A accumulated in MCF7 cells on zoledronate-treated bone, suggesting zoledronate acted through the inhibition of the mevalonate pathway. Accumulation of cleaved caspase-8 in MDA-MB-231 cells on bisphosphonate-treated bone indicated increased apoptosis in the cells. In conclusion, bone-bound zoledronate inhibits breast cancer cell proliferation, an activity that may contribute to its clinical anti-tumour effects.
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Affiliation(s)
- Young-Eun Park
- Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Usha Bava
- Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Jian-Ming Lin
- Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Jillian Cornish
- Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Dorit Naot
- Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Ian R Reid
- Department of Medicine, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand.
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3
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Zhao Z, Shen W, Zhu H, Lin L, Jiang G, Zhu Y, Song H, Wu L. Zoledronate inhibits fibroblasts' proliferation and activation via targeting TGF-β signaling pathway. DRUG DESIGN DEVELOPMENT AND THERAPY 2018; 12:3021-3031. [PMID: 30271117 PMCID: PMC6147205 DOI: 10.2147/dddt.s168897] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Background Previous preclinical and clinical studies have demonstrated that zoledronate might inhibit neointimal hyperplasia at least partly by inhibiting the proliferation, adhesion and migration of vascular smooth muscle cells (VSMCs). However, whether zoledronate influences fibroblasts’ proliferation and activation, which also play a key role in neointimal hyperplasia and vascular remodeling, remains largely unknown. In the present study, the effect of zoledronate on fibroblasts was investigated and the underlying molecular mechanisms were examined. Methods After treatment with zoledronate, changes in biological behaviors, including the morphology, proliferation, cell-cycle distribution and migration of fibroblasts (NIH3T3 cells), were observed. The expression of α-SMA, TGF-β1 and TGF-β2 and the level of Smad2/3 phosphorylation in cultured fibroblasts were examined by Western blot. In vivo expression of α-SMA and TGF-β1 was assessed by immunohistochemical staining. Results It was shown that the typical fibroblast cell morphology was altered after zoledronate exposure. Cultured fibroblasts treated with zoledronate displayed dose-dependent inhibition of cell proliferation due to cell-cycle arrest in the S phase. Cell migration activities were also dose dependently suppressed by zoledronate treatment. Expression of α-SMA in cultured fibroblasts was significantly reduced by zoledronate treatment. Further analysis showed decreased expression of TGF-β1 and α-SMA by periadventitial delivery of zoledronate in the rat carotid balloon-injury model. The expression of TGF-β1 and TGF-β2 and the phosphorylation of Smad2/3 in cultured fibroblasts were significantly inhibited by zoledronate treatment. Conclusion Our findings demonstrated that zoledronate can inhibit the proliferation, migration and activation of fibroblasts via the TGF-β signaling pathway and revealed a novel mechanism of zoledronate action against neointimal hyperplasia.
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Affiliation(s)
- Zichang Zhao
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China, .,Department of Ophthalmology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Wei Shen
- Department of Ophthalmology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Hanbin Zhu
- Company 11 of Student Brigade, Second Military Medical University, Shanghai, China
| | - Lin Lin
- Department of Regenerative Medicine, Tongji University School of Medicine, Shanghai, China
| | - Gening Jiang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China,
| | - Yongzhe Zhu
- Department of Microbiology, Second Military Medical University, Shanghai, China
| | - Hongyuan Song
- Department of Ophthalmology, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Liang Wu
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China,
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Minegaki T, Koiki S, Douke Y, Yamane C, Suzuki A, Mori M, Tsujimoto M, Nishiguchi K. Augmentation of the cytotoxic effects of nitrogen-containing bisphosphonates in hypoxia. ACTA ACUST UNITED AC 2018; 70:1040-1047. [PMID: 29761837 DOI: 10.1111/jphp.12934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 04/16/2018] [Indexed: 12/01/2022]
Abstract
OBJECTIVES Tumour hypoxia is a major obstacle in cancer therapy that leads to poor prognosis. Therefore, the development of cancer treatments that are effective in hypoxia is necessary. Nitrogen-containing bisphosphonates (N-BPs), which are used to treat bone disease, are cytotoxic to several cancer cells in normoxia. Therefore, we investigated the cytotoxicity of N-BPs in cancer cells in hypoxia. METHODS We studied the cytotoxicities of N-BPs, statins and anticancer drugs in human cancer cells under hypoxic conditions (1% O2 ). The expression levels of enzymes in the mevalonate pathway in hypoxia were measured by real-time reverse transcription polymerase chain reaction and Western blotting. KEY FINDINGS In hypoxia, cell growth inhibition by 5-fluorouracil and cisplatin was not changed as compared to that in normoxia; however, cell growth inhibition by N-BPs and via zoledronate-induced apoptosis was higher in hypoxia than that in normoxia. Furthermore, geranylgeraniol completely inhibited the growth inhibitory effects of zoledronate. Additionally, the mRNA and protein levels of 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase significantly decreased in hypoxia. Moreover, simvastatin potentiated the growth inhibitory effect of zoledronate. CONCLUSIONS The cytotoxicity of N-BPs, but not 5-fluorouracil and cisplatin, is potentiated in hypoxia, through the loss of HMG-CoA reductase function. N-BPs may be effective against cancer in normoxia and hypoxia.
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Affiliation(s)
- Tetsuya Minegaki
- Faculty of Pharmaceutical Sciences, Department of Clinical Pharmacy, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Saya Koiki
- Faculty of Pharmaceutical Sciences, Department of Clinical Pharmacy, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Yutaro Douke
- Faculty of Pharmaceutical Sciences, Department of Clinical Pharmacy, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Chihiro Yamane
- Faculty of Pharmaceutical Sciences, Department of Clinical Pharmacy, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Ai Suzuki
- Faculty of Pharmaceutical Sciences, Department of Clinical Pharmacy, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Misato Mori
- Faculty of Pharmaceutical Sciences, Department of Clinical Pharmacy, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Masayuki Tsujimoto
- Faculty of Pharmaceutical Sciences, Department of Clinical Pharmacy, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Kohshi Nishiguchi
- Faculty of Pharmaceutical Sciences, Department of Clinical Pharmacy, Kyoto Pharmaceutical University, Kyoto, Japan
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Liu S, Cai X, Xia L, Jiang C, Chen P, Wang X, Zhang B, Zhao HY. Chloroquine exerts antitumor effects on NB4 acute promyelocytic leukemia cells and functions synergistically with arsenic trioxide. Oncol Lett 2017; 15:2024-2030. [PMID: 29434902 DOI: 10.3892/ol.2017.7488] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 10/26/2017] [Indexed: 01/17/2023] Open
Abstract
Chloroquine (CQ) has been confirmed to exhibit antitumor effects on different types of cancer cell, but whether it exerts the same effect on acute promyelocytic leukemia (APL) cells remains to be confirmed. In the present study, the effects of various concentrations of CQ on the growth, apoptosis and cell cycle distribution of NB4 cells, as well as the potential mechanisms underlying these effects, were examined. The combined effect of CQ and arsenic trioxide (ATO) on the growth of NB4 cells was also determined. The results of the present study demonstrated that CQ treatment inhibited cell proliferation, and induced mitochondrial pathway apoptosis and S phase arrest in a dose-dependent manner by regulating apoptosis- and cell cycle-related proteins. CQ and ATO had a synergistic effect on the growth inhibition of NB4 cells, which may have been induced through the inhibition of autophagy. In conclusion, the results of the present study indicated that CQ exhibits a cytotoxic effect on NB4 cells and has a synergistic effect when combined with ATO, which thereby improves the curative effect of ATO on APL.
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Affiliation(s)
- Shousheng Liu
- Department of General Medicine, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 510060, P.R. China
| | - Xiuyu Cai
- Department of General Medicine, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 510060, P.R. China
| | - Liangping Xia
- Department of General Medicine, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 510060, P.R. China
| | - Chang Jiang
- Department of General Medicine, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 510060, P.R. China
| | - Ping Chen
- Department of General Medicine, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 510060, P.R. China
| | - Xiaopai Wang
- Department of Pathology, Guangzhou First People's Hospital, Guangzhou, Guangdong 510080, P.R. China
| | - Bei Zhang
- Department of General Medicine, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 510060, P.R. China
| | - Hong Yun Zhao
- Department of Medical Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong 510060, P.R. China
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Singh SK, Banerjee S, Acosta EP, Lillard JW, Singh R. Resveratrol induces cell cycle arrest and apoptosis with docetaxel in prostate cancer cells via a p53/ p21WAF1/CIP1 and p27KIP1 pathway. Oncotarget 2017; 8:17216-17228. [PMID: 28212547 PMCID: PMC5370034 DOI: 10.18632/oncotarget.15303] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Accepted: 01/24/2017] [Indexed: 01/14/2023] Open
Abstract
Resveratrol (RES) is the most effective natural products used for the treatment of a variety of cancers. In this study, we tested the effect of RES in enhancing the efficacy of docetaxel (DTX) treatment in prostate cancer (PCa) cells. The C4-2B and DU-145 cell lines were treated with RES, DTX and combination followed by evaluating the apoptosis and cell cycle progression. The combined drug treatment up-regulates the pro-apoptotic genes (BAX, BID, and BAK), cleaved PARP and down regulates the anti-apoptotic genes (MCL-1, BCL-2, BCL-XL) promoting apoptosis. In C4-2B cells the combination up regulated the expression of p53, and cell cycle inhibitors (p21WAF1/CIP1, p27KIP), which, in turn, inhibited the expression of CDK4, cyclin D1, cyclin E1 and induced hypo-phosphorylation of Rb thus blocking the transition of cells in the G0/G1 to S phase. In contrast, the synergistic effect was not profound in DU145 due to its lesser sensitivity to DTX. The suppression of cyclin B1 and CDK1 expression in both cell lines inhibits the further progression of cells in G2/M phase. The current study demonstrates that combination treatment blocks the cell cycle arrest by modulation of key regulators and promotes apoptosis via p53 dependent and independent mechanism in PCa.
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Affiliation(s)
- Santosh Kumar Singh
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Saswati Banerjee
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Edward P Acosta
- Department of Pharmacology & Toxicology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - James W Lillard
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA, USA
| | - Rajesh Singh
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA, USA
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Minegaki T, Fukushima S, Morioka C, Takanashi H, Uno J, Tsuji S, Yamamoto S, Watanabe A, Tsujimoto M, Nishiguchi K. Effects of bisphosphonates on human esophageal squamous cell carcinoma cell survival. Dis Esophagus 2016; 29:656-62. [PMID: 25894100 DOI: 10.1111/dote.12370] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Esophageal squamous cell carcinoma (ESCC) is one of the most malignant cancers in Japan. Anticancer chemotherapy has been useful for ESCC treatment. However, therapeutic options are limited. Recently, bisphosphonates (BPs), which are osteoporosis drugs, have shown anticancer effects in several cancer cell lines, but the effects against ESCC cell lines are unknown. In this study, we examined the cytotoxic effects of BPs and their mechanisms of cytotoxicity in human ESCC cell lines. A first-generation BP (etidronate), two second-generation BPs (alendronate and pamidronate), and two third-generation BPs (risedronate and zoledronate) were used in this study. All BPs, except etidronate, were cytotoxic, as indicated by increased caspase-3/7 activity and numbers of Annexin-fluorescein isothiocyanate positive cells in ESCC cell lines. From cell cycle analysis, G0/G1-phase arrest was observed upon treatment with second- and third-generation BPs. In addition, Cyclin D1 protein expression levels were decreased by second- and third-generation BP treatment. Although squalene and trans, trans-farnesol minimally affected BP cytotoxicity, treatment with geranylgeraniol inhibited BP cytotoxicity almost completely. We concluded that second- and third-generation BPs are cytotoxic to ESCC cell lines as they induce apoptosis and inhibit the cell cycle through mevalonate pathway inhibition. Therefore, BP treatment may be a beneficial therapy in ESCC patients.
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Affiliation(s)
- T Minegaki
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - S Fukushima
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - C Morioka
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - H Takanashi
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - J Uno
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - S Tsuji
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - S Yamamoto
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - A Watanabe
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - M Tsujimoto
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
| | - K Nishiguchi
- Department of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University, Kyoto, Japan
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8
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Ang C, Doyle E, Branch A. Bisphosphonates as potential adjuvants for patients with cancers of the digestive system. World J Gastroenterol 2016; 22:906-916. [PMID: 26811636 PMCID: PMC4716044 DOI: 10.3748/wjg.v22.i3.906] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 11/05/2015] [Accepted: 12/08/2015] [Indexed: 02/06/2023] Open
Abstract
Best known for their anti-resorptive activity in bone, bisphosphonates (BPs) have generated interest as potential antineoplastic agents given their pleiotropic biological effects which include antiproliferative, antiangiogenic and immune-modulating properties. Clinical studies in multiple malignancies suggest that BPs may be active in the prevention or treatment of cancer. Digestive tract malignancies represent a large and heterogeneous disease group, and the activity of BPs in these cancers has not been extensively studied. Recent data showing that some BPs inhibit human epidermal growth factor receptor (HER) signaling highlight a potential therapeutic opportunity in digestive cancers, many of which have alterations in the HER axis. Herein, we review the available evidence providing a rationale for the repurposing of BPs as a therapeutic adjunct in the treatment of digestive malignancies, especially in HER-driven subgroups.
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Biray Avci C, Kurt CC, Tepedelen BE, Ozalp O, Goker B, Mutlu Z, Dodurga Y, Elmas L, Gunduz C. Zoledronic acid induces apoptosis via stimulating the expressions of ERN1, TLR2, and IRF5 genes in glioma cells. Tumour Biol 2015; 37:6673-9. [PMID: 26646564 DOI: 10.1007/s13277-015-4519-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 11/25/2015] [Indexed: 11/28/2022] Open
Abstract
Glioblastoma multiforme (GBM) is the most common and aggressive brain tumor that affects older people. Although the current therapeutic approaches for GBM include surgical resection, radiotherapy, and chemotherapeutic agent temozolomide, the median survival of patients is 14.6 months because of its aggressiveness. Zoledronic acid (ZA) is a nitrogen-containing bisphosphonate that exhibited anticancer activity in different cancers. The purpose of this study was to assess the potential effect of ZA in distinct signal transduction pathways in U87-MG cells. In this study, experiments performed on U87-MG cell line (Human glioblastoma-astrocytoma, epithelial-like cell line) which is an in vitro model of human glioblastoma cells to examine the cytotoxic and apoptotic effects of ZA. IC50 dose of ZA, 25 μM, applied on U87-MG cells during 72 h. ApoDIRECT In Situ DNA Fragmentation Assay was used to investigate apoptosis of U87MG cells. The quantitative reverse transcription polymerase chain reaction (qRT-PCR) (LightCycler480 System) was carried out for 48 gene expression like NF-κB, Toll-like receptors, cytokines, and inteferons. Our results indicated that ZA (IC50 dose) increased apoptosis 1.27-fold in U87MG cells according to control cells. According to qRT-PCR data, expression levels of the endoplasmic reticulum-nuclei-1 (ERN1), Toll-like receptor 2 (TLR2), and human IFN regulatory factor 5 (IRF5) tumor suppressor genes elevated 2.05-, 2.08-, and 2.3-fold by ZA, respectively, in U87MG cells. Our recent results indicated that ZA have a key role in GBM progression and might be considered as a potential agent in glioma treatment.
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Affiliation(s)
- Cigir Biray Avci
- Medical Biology Department, Ege University Medical School, Bornova, Izmir, Turkey.
| | - Cansu Caliskan Kurt
- Medical Biology Department, Ege University Medical School, Bornova, Izmir, Turkey
| | - Burcu Erbaykent Tepedelen
- Department of Molecular Biology and Genetics, Avrasya University Faculty of Science and Letters, Trabzon, Turkey
| | - Ozgun Ozalp
- Medical Biology Department, Ege University Medical School, Bornova, Izmir, Turkey
| | - Bakiye Goker
- Medical Biology Department, Ege University Medical School, Bornova, Izmir, Turkey
| | - Zeynep Mutlu
- Medical Biology Department, Ege University Medical School, Bornova, Izmir, Turkey
| | - Yavuz Dodurga
- Medical Biology Department, Pamukkale University Medical School, Denizli, Turkey
| | - Levent Elmas
- Medical Biology Department, Pamukkale University Medical School, Denizli, Turkey
| | - Cumhur Gunduz
- Medical Biology Department, Ege University Medical School, Bornova, Izmir, Turkey
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10
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Huang O, Zhang W, Zhi Q, Xue X, Liu H, Shen D, Geng M, Xie Z, Jiang M. Teriflunomide, an immunomodulatory drug, exerts anticancer activity in triple negative breast cancer cells. Exp Biol Med (Maywood) 2014; 240:426-37. [PMID: 25304315 DOI: 10.1177/1535370214554881] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 08/26/2014] [Indexed: 12/29/2022] Open
Abstract
Triple-negative breast cancer (TNBC) is defined as a group of primary breast cancers lacking expression of estrogen, progesterone, and human epidermal growth factor receptor-2 (HER-2) receptors, characterized by higher relapse rate and lower survival compared with other subtypes. Due to lack of identified targets and molecular heterogeneity, conventional chemotherapy is the only available option for treatment of TNBC, but non-discordant positive therapeutic efficacy could not be achieved. Here, we demonstrated that these TNBC cells were sensitive to teriflunomide, which was a well-known immunomodulatory drug for treatment of relapsing multiple sclerosis (MS). Potent anti-cancer effects in TNBC in vitro, including proliferation inhibition, cell cycle delay, cell apoptosis, and suppression of cell motility and invasiveness, could be achieved with this agent. Of note, we showed that multiple signals involved in TNBC proliferation, survival, migratory, and invasive potential were under regulation by teriflunomide. Among them, we identified down-regulation of growth factor receptors to abolish growth maintenance, suppression of c-Myc, and cyclin D1 to contribute to its anti-proliferative effect, modulation of components of cell cycle to induce S-phase arrest, degradation of Bcl-xL, and up-regulation of BAX via activation of MAPK pathway to induce apoptosis, and inhibition of epithelial-mesenchymal transition (EMT) process, matrix metalloproteinase-9 (MMP9) expression, and inactivation of Src/FAK to reduce TNBC migration and invasion. The results identified teriflunomide may be of therapeutic benefit for the more aggressive and difficult-to-treat breast cancer subtype, indicating the use of teriflunomide for clinical trials for treatment of TNBC patients.
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Affiliation(s)
- Ou Huang
- Comprehensive Breast Health Centre, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Weili Zhang
- Department of Gastroenterology, Xiangcheng People's Hospital, Suzhou, 215131, China
| | - Qiaoming Zhi
- Department of Breast Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
| | - Xiaofeng Xue
- Department of Breast Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
| | - Hongchun Liu
- Division of Antitumor Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Daoming Shen
- Department of Gastroenterology, Xiangcheng People's Hospital, Suzhou, 215131, China
| | - Meiyu Geng
- Division of Antitumor Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Zuoquan Xie
- Division of Antitumor Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Min Jiang
- Department of Breast Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
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11
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Zoledronic acid exerts antitumor effects in NB4 acute promyelocytic leukemia cells by inducing apoptosis and S phase arrest. Biomed Pharmacother 2014; 68:1031-6. [DOI: 10.1016/j.biopha.2014.09.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 09/09/2014] [Indexed: 01/03/2023] Open
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12
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Lopez Jornet P, Susana SC, Rosario TM, Alvaro PF. Zoledronic acid and irradiation in oral squamous cell carcinoma. J Oral Pathol Med 2014; 44:103-8. [PMID: 25059973 DOI: 10.1111/jop.12205] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2014] [Indexed: 12/17/2022]
Abstract
OBJECTIVE This in vitro study evaluated cytotoxicity and cell migration effects of zoledronic acid and irradiation upon oral squamous cell carcinoma. MATERIALS AND METHODS Zoledronic acid was administrated at doses of 10, 25, 50, and 100 μM to PE/CA-PJ15 oral squamous cell carcinoma cultures, irradiated with different doses (0, 5, 15, and 30 Gy), followed by evaluation of the effects on cell viability. Cell migration capacity was studied after 24- and 72-h incubation. RESULTS At 24 h, the 100 μM concentration of zoledronic acid combined with 15 Gy irradiation caused the greatest decrease in cell viability. At 72 h, statistically significant decreases in cell viability were found with all concentrations of zoledronic acid with or without irradiation: 0 Gy (P < 0.001), 5 Gy (P < 0.001), 15 Gy (P < 0.001), and 30 Gy (P < 0.001). 50 μM and 100 μM doses of zoledronic acid combined with 5 Gy irradiation yielded the greatest decrease in cell migration capacity. CONCLUSIONS Zoledronic acid increases cytotoxic activity in the PE/CA-PJ15 cell line and reduces cell migration capacity. These findings suggest that combination therapy using biphosphates and radiation may offer a promising therapy.
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Affiliation(s)
- Pia Lopez Jornet
- Department of Oral Medicine, University of Murcia, Murcia, Spain
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Ge XY, Yang LQ, Jiang Y, Yang WW, Fu J, Li SL. Reactive oxygen species and autophagy associated apoptosis and limitation of clonogenic survival induced by zoledronic acid in salivary adenoid cystic carcinoma cell line SACC-83. PLoS One 2014; 9:e101207. [PMID: 24963720 PMCID: PMC4071064 DOI: 10.1371/journal.pone.0101207] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Accepted: 06/04/2014] [Indexed: 01/10/2023] Open
Abstract
Salivary adenoid cystic carcinoma is an epithelial tumor in the head and neck region. Despite its slow growth, patients with salivary adenoid cystic carcinoma exhibit poor long term survival because of a high rate of distant metastasis. Lung and bone are common distant metastasis sites. Zoledronic acid, a third generation bisphosphonate, has been used for tumor-induced osteolysis due to bone metastasis and has direct antitumor activity in several human neoplasms. Here, we observed that zoledronic acid inhibited salivary adenoid cystic carcinoma cell line SACC-83 xenograft tumor growth in nude mice. In vitro, zoledronic acid induced apoptosis and reduced clonogenic survival in SACC-83. Flow cytometry and western blotting indicated that the cell cycle was arrested at G0/G1. Zoledronic acid treatment upregulated reactive oxygen species as well as the autophagy marker protein LC-3B. Reactive oxygen species scavenger N-acetylcysteine and autophagy antagonist 3-methyladenine decreased zoledronic acid-induced apoptosis and increased clonogenic survival. Silencing of the autophagy related gene Beclin-1 also decreased zoledronic acid-induced apoptosis and inhibition of clonogenic formation. In addition, isobolographic analysis revealed synergistic effects on apoptosis when zoledronic acid and paclitaxel/cisplatin were combined. Taken together, our results suggest that zoledronic acid induced apoptosis and reduced clonogenic survival via upregulation of reactive oxygen species and autophagy in the SACC-83 cell line. Thus, zoledronic acid should be considered a promising drug for the treatment of salivary adenoid cystic carcinoma.
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Affiliation(s)
- Xi-Yuan Ge
- Central Laboratory, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China
| | - Lin-Qian Yang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China
| | - Yang Jiang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China
| | - Wen-Wen Yang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China
| | - Jia Fu
- Central Laboratory, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China
| | - Sheng-Lin Li
- Central Laboratory, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Haidian District, Beijing, PR China
- * E-mail:
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Prenylated Flavonoids from Morus alba L. Cause Inhibition of G1/S Transition in THP-1 Human Leukemia Cells and Prevent the Lipopolysaccharide-Induced Inflammatory Response. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:350519. [PMID: 23762124 PMCID: PMC3671669 DOI: 10.1155/2013/350519] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 04/26/2013] [Indexed: 12/04/2022]
Abstract
Morus alba L. (MA) is a natural source of many compounds with different biological effects. It has been described to possess anti-inflammatory, antioxidant, and hepatoprotective activities. The aim of this study was to evaluate cytotoxicity of three flavonoids isolated from MA (kuwanon E, cudraflavone B, and 4′-O-methylkuwanon E) and to determine their effects on proliferation of THP-1 cells, and on cell cycle progression of cancer cells. Anti-inflammatory effects were also determined for all three given flavonoids.
Methods used in the study included quantification of cells by hemocytometer and WST-1 assays, flow cytometry, western blotting, ELISA, and zymography.
From the three compounds tested, cudraflavone B showed the strongest effects on cell cycle progression and viability of tumor and/or immortalized cells and also on inflammatory response of macrophage-like cells. Kuwanon E and 4′-O-methylkuwanon E exerted more sophisticated rather than direct toxic effect on used cell types. Our data indicate that mechanisms different from stress-related or apoptotic signaling pathways are involved in the action of these compounds. Although further studies are required to precisely define the mechanisms of MA flavonoid action in human cancer and macrophage-like cells, here we demonstrate their effects combining antiproliferative and anti-inflammatory activities, respectively.
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Schech AJ, Kazi AA, Gilani RA, Brodie AH. Zoledronic acid reverses the epithelial-mesenchymal transition and inhibits self-renewal of breast cancer cells through inactivation of NF-κB. Mol Cancer Ther 2013; 12:1356-66. [PMID: 23619300 DOI: 10.1158/1535-7163.mct-12-0304] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Zoledronic acid, a third-generation bisphosphonate, has been shown to reduce cell migration, invasion, and metastasis. However, the effects of zoledronic acid on the epithelial-mesenchymal transition (EMT), a cellular process essential to the metastatic cascade, remain unclear. Therefore, the effects of zoledronic acid on EMT, using triple-negative breast cancer (TNBC) cells as a model system, were examined in more detail. Zoledronic acid treatment decreased the expression of mesenchymal markers, N-cadherin, Twist, and Snail, and subsequently upregulated expression of E-cadherin. Zoledronic acid also inhibited cell viability, induced cell-cycle arrest, and decreased the proliferative capacity of TNBC, suggesting that zoledronic acid inhibits viability through reduction of cell proliferation. As EMT has been linked to acquisition of a self-renewal phenotype, the effects of zoledronic acid on self-renewal in TNBC were also studied. Treatment with zoledronic acid decreased expression of self-renewal proteins, BMI-1 and Oct-4, and both prevented and eliminated mammosphere formation. To understand the mechanism of these results, the effect of zoledronic acid on established EMT regulator NF-κB was investigated. Zoledronic acid inhibited phosphorylation of RelA, the active subunit of NF-κB, at serine 536 and modulated RelA subcellular localization. Treatment with zoledronic acid reduced RelA binding to the Twist promoter, providing a direct link between inactivation of NF-κB signaling and loss of EMT transcription factor gene expression. Binding of Twist to the BMI-1 promoter was also decreased, correlating modulation of EMT to decreased self-renewal. On the basis of these results, it is proposed that through inactivation of NF-κB, zoledronic acid reverses EMT, which leads to a decrease in self-renewal.
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Affiliation(s)
- Amanda J Schech
- Department of Pharmacology and Experimental Therapeutics, University of Maryland, School of Medicine, Baltimore, MD 21201, USA
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Li XY, Lin YC, Huang WL, Lin W, Wang HB, Lin WZ, Lin SL. Zoledronic acid inhibits human nasopharyngeal carcinoma cell proliferation by activating mitochondrial apoptotic pathway. Med Oncol 2012; 29:3374-80. [PMID: 22729369 DOI: 10.1007/s12032-012-0281-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 06/08/2012] [Indexed: 02/05/2023]
Abstract
We investigated the apoptosis-inducing effect of zoledronic acid in human nasopharyngeal carcinoma cell HNE-1 and explore the potential mechanism. Human nasopharyngeal carcinoma cell HNE-1 was exposed to various concentrations (0-40 μmol/L) of zoledronic acid. Cell proliferation was studied by an MTT assay. Cell apoptosis was analyzed by flow cytometry and TdT-mediated dUTP nick-end labeling (TUNEL) assay. Cell cycle was analyzed by flow cytometry. Gene expressions were investigated by quantitative real-time PCR, and protein expressions were investigated by Western blot. The results showed zoledronic acid decreased cell proliferation not in a time- or dose-dependent fashion. TUNEL assay, together with Annexin V/propidium iodide FACS analysis, confirmed the increase in apoptotic HNE-1 cells treated with zoledronic acid. Cell cycle analysis showed a larger number of treated cells occupied the S-phase. Quantitative RT-PCR and Western blot revealed that the pro-apoptotic genes, Bad, Bax, and Caspase-9, were upregulated in treated HNE-1 cells, whereas the anti-apoptotic gene, Bcl-2, was downregulated in both mRNA and protein levels. In conclusion, zoledronic inhibits human nasopharyngeal carcinoma cell proliferation by inducing apoptosis via the mitochondrial apoptotic pathway.
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Affiliation(s)
- Xu-Yuan Li
- Department of Internal Medicine, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, 515031, China
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Albadawi H, Haurani MJ, Oklu R, Trubiano JP, Laub PJ, Yoo HJ, Watkins MT. Differential effect of zoledronic acid on human vascular smooth muscle cells. J Surg Res 2012; 182:339-46. [PMID: 23164362 DOI: 10.1016/j.jss.2012.10.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 10/09/2012] [Accepted: 10/17/2012] [Indexed: 01/09/2023]
Abstract
INTRODUCTION The activation of human vascular smooth muscle cell proliferation, adhesion and migration is essential for intimal hyperplasia formation. These experiments were designed to test whether zoledronic acid (ZA) would modulate indices of human smooth muscle cell activation, exert differential effects on proliferating versus quiescent cells, and determine whether these effects were dependent on GTPase binding proteins prenylation. ZA was chosen for testing in these experiments because it is clinically used in humans with cancer, and has been shown to modulate rat smooth muscle cell proliferation and migration. METHODS Human aortic smooth muscle cells (HASMC) were cultured under either proliferating or growth arrest (quiescent) conditions in the presence or absence of ZA for 48 hours, whereupon the effect of ZA on HASMC proliferation, cellular viability, metabolic activity, and membrane integrity were compared. In addition, the effect of ZA on adhesion and migration were assessed in proliferating cells. The effect of increased concentration of ZA on the mevalonate pathway and genomic/cellular stress related poly-adenosine diphosphate ribose polymerase enzyme activity were assessed using the relative prenylation of Rap-1A/B protein and the formation of poly adenosine diphosphate-ribosylated protein, respectively. RESULTS There was a dose dependent inhibition of cellular proliferation, adhesion and migration following ZA treatment. ZA treatment decreased indices of cellular viability and significantly increased membrane injury in proliferating versus quiescent cells. This was correlated with the appearance of unprenylated Rap-1A protein and dose dependent down regulation of activity. CONCLUSIONS These data suggest that ZA is effective in inhibiting HASMC proliferation, adhesion, and migration, which coincide with the appearance of unprenylated RAP-1A/B protein, thereby suggesting that the mevalonate pathway may play a role in the inhibition of HASMC activation.
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Affiliation(s)
- Hassan Albadawi
- Division of Vascular and Endovascular Surgery, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
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Zoledronic acid produces antitumor effects on mesothelioma through apoptosis and S-phase arrest in p53-independent and Ras prenylation-independent manners. J Thorac Oncol 2012; 7:873-82. [PMID: 22481236 DOI: 10.1097/jto.0b013e31824c7d43] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
INTRODUCTION We examined whether zoledronic acid (ZOL), the third generation of bisphosphonates, produced cytotoxic effects on human mesothelioma cells in vitro and in vivo, and investigated a possible involvement of p53, Ras, and extracellular signal-regulated kinase1/2 (ERK1/2) pathways. METHODS Cytotoxicity and cell cycles were assessed with a colorimetric assay and flow cytometry, respectively. Expression levels of apoptosis-linked proteins and prenylation of small guanine-nucleotide-binding regulatory proteins were tested with p53-small interfering RNA, an ERK kinase1/2-inhibitor, and prenyl alcohols. The antitumor activity was examined in an orthotopic animal model. RESULTS ZOL treatments suppressed growth of mesothelioma cells bearing the wild-type p53 gene through apoptosis induction accompanied by activation of caspases, or S-phase arrest by up-regulated cyclin A and B1. ZOL induced p53 phosphorylation and subsequent activation of the downstream pathways. Down-regulated p53 expression with the small interfering RNA, however, showed that both apoptosis and S-phase arrest were irrelevant to the p53 activation. Geranylgeranyl but not farnesyl pyrophosphate inhibited ZOL-induced apoptosis and S-phase arrest, and the geranylgeraniol supplement decreased ZOL-mediated Rap1A but not Ras unprenylation. Inhibition of ERK1/2 pathways suppressed ZOL-induced apoptosis but not S-phase arrest. We further demonstrated that ZOL, administrated intrapleurally, inhibited the tumor growth in the pleural cavity. CONCLUSIONS These data indicate that ZOL induces apoptosis or S-phase arrest, both of which are independent of p53 activation and Ras unprenylation, and suggest that ZOL is a possible therapeutic agent to mesothelioma partly through non-Ras- and ERK1/2-mediated pathways.
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Zoledronic acid induces S-phase arrest via a DNA damage response in normal human oral keratinocytes. Arch Oral Biol 2012; 57:906-17. [DOI: 10.1016/j.archoralbio.2011.11.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 11/11/2011] [Accepted: 11/20/2011] [Indexed: 01/16/2023]
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Metcalf S, Pandha HS, Morgan R. Antiangiogenic effects of zoledronate on cancer neovasculature. Future Oncol 2012; 7:1325-33. [PMID: 22044205 DOI: 10.2217/fon.11.113] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Angiogenesis, one of the hallmarks of cancer, supplies nutrients to cancerous tissues to facilitate rapid growth. Targeting cancer-associated angiogenesis is an important goal in cancer therapy and there are currently many drugs that affect tumor-associated vasculature. In this article, we will focus on the antiangiogenic effects of zoledronate (ZA), a bisphosphonate drug routinely used in the treatment of cancer-associated bone disease. This article covers the known effects of ZA throughout the clinical process. It also covers the animal models of cancer that have been treated with ZA and evaluated for angiogenes is, concluding with the current clinical data pertaining to angiogenic factors after ZA treatment.
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Affiliation(s)
- Stephen Metcalf
- Postgraduate Medical School, Faculty of Health & Medical Sciences, University of Surrey, UK
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Kollár P, Bárta T, Závalová V, Smejkal K, Hampl A. Geranylated flavanone tomentodiplacone B inhibits proliferation of human monocytic leukaemia (THP-1) cells. Br J Pharmacol 2011; 162:1534-41. [PMID: 21175584 DOI: 10.1111/j.1476-5381.2010.01171.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND AND PURPOSE Paulownia tomentosa is a rich source of geranylated flavanones, some of which we have previously shown to have cytotoxic activity. To identify members of this class of compounds with cytostatic effects, we assessed the effects of the geranylated flavanone tomentodiplacone B (TOM B) on cell cycle progression and cell cycle regulatory pathways of THP-1 human monocytic leukaemia cells. EXPERIMENTAL APPROACH Cell viability was measured by dye exclusion and proliferation by WST-1 assays; cell cycle was monitored by flow cytometry. Regulatory proteins were assessed by immunoprecipitation and kinase assays, and Western blotting. KEY RESULTS Tomentodiplacone B had no effect during the first 24 h of cell growth at concentrations between 1 and 2.5 µM, but inhibited cell growth in a dose-dependent manner at concentrations of 5 µM or higher. Growth inhibition during the first 24 h of exposure to TOM B was not accompanied by cytotoxicity as cells were accumulated in G1 phase dose-dependently. This G1 phase accumulation was associated with down-regulation of cyclin-dependent kinase 2 activity and also protein levels of cyclins E1 and A2. However, key stress-related molecules (γ-H2AX, p53 and p21) were not induced, suggesting that TOM B acts by directly inhibiting the cyclin-dependent kinase 2 signalling pathway rather than initiating DNA damage or cellular stress. CONCLUSIONS AND IMPLICATIONS Our study provides the first evidence that TOM B directly inhibits proliferation of human monocytic leukaemia cells, and thus is a potential anticancer agent, preventing leukaemia cells from progressing from G1 phase into DNA synthesis.
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Affiliation(s)
- Peter Kollár
- Department of Human Pharmacology and Toxicology, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic.
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The BH3-mimetic ABT-737 targets the apoptotic machinery in cholangiocarcinoma cell lines resulting in synergistic interactions with zoledronic acid. Cancer Chemother Pharmacol 2010; 67:557-67. [PMID: 20473610 DOI: 10.1007/s00280-010-1345-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Accepted: 04/23/2010] [Indexed: 02/07/2023]
Abstract
PURPOSE In TFK-1 and EGI-1 cholangiocarcinoma cell lines, zoledronic acid (ZOL) determines an S-phase block without apoptosis. Here, we investigated the occurrence of apoptosis stigmata when ZOL is associated to the BH3-mimetic ABT-737. METHODS In EGI-1 and TFK-1 cholangiocarcinoma cell lines untreated or treated with ABT-737 alone or in combination with ZOL, the pro-survival protein's pattern (BCL-2, BCL-XL, MCL-1, HSP72, HSP27) was investigated by biochemical criteria along with the occurrence of mitochondrial damage evaluated by cytofluorimetric analysis using a cationic dye. RESULTS ABT-737 induced growth inhibition and significantly affected the colony-forming ability of both EGI-1 and TFK-1 cells. However, activated PARP-1 or/and caspase-3 cleavage (apoptosis markers) were detected only at the highest ABT-737 concentrations used. Combined treatment showed synergistic effect by converting the predominant cytostatic effect of ZOL into a cytotoxic one as shown by striking increment of mitochondrial harmed cells along with PARP-1 activation and caspase-3 cleavage. CONCLUSION The lack of apoptosis following ZOL treatment in these cholangiocarcinoma cell lines appears to be multifactorial and could be ascribed to the large constitutive expression of pro-survival proteins. The efficacy of ZOL treatment requires a concomitant unleashing of apoptosis using a selective BH3-mimetic as ABT-737. The rational targeting of specific components of the apoptotic pathway may appear a useful approach to improve the treatment of refractory or relapsed cholangiocarcinoma. Combined treatment could be further explored in in vivo tumor model of cholangiocarcinoma.
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Towata T, Komizu Y, Kariya R, Suzu S, Matsumoto Y, Kobayashi N, Wongkham C, Wongkham S, Ueoka R, Okada S. Hybrid liposomes inhibit the growth of cholangiocarcinoma by induction of cell cycle arrest in G1 phase. Bioorg Med Chem Lett 2010; 20:3680-2. [PMID: 20494578 DOI: 10.1016/j.bmcl.2010.04.091] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Revised: 04/14/2010] [Accepted: 04/21/2010] [Indexed: 11/30/2022]
Abstract
Specific accumulation and cell cycle arrest were observed in human cholangiocarcinoma cells by hybrid liposomes composed of 90 mol% L-alpha-dimyristoylphosphatidylcholine (DMPC) and 10 mol% polyoxyethylene(21)dodecyl ether (C(12)(EO)(21)) without affecting normal cholangiocytes.
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Affiliation(s)
- Tomomi Towata
- Division of Applied Life Science, Graduate School of Engineering, Sojo University, Ikeda, Kumamoto, Japan
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