1
|
Arsenic trioxide promotes ERK1/2-mediated phosphorylation and degradation of BIM EL to attenuate apoptosis in BEAS-2B cells. Chem Biol Interact 2023; 369:110304. [PMID: 36509116 DOI: 10.1016/j.cbi.2022.110304] [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: 09/02/2022] [Revised: 12/05/2022] [Accepted: 12/09/2022] [Indexed: 12/14/2022]
Abstract
Inorganic arsenic is highly toxic, widely distributed in the human environment and may result in multisystem diseases and several types of cancers. The BCL-2-interacting mediator of cell death protein (BIM) is a key modulator of the intrinsic apoptosis pathway. Interestingly, in the present study, we found that arsenic trioxide (As2O3) decreased BIMEL levels in human bronchial epithelial cell line BEAS-2B and increased BIMEL levels in human lung carcinoma cell line A549 and mouse Sertoli cell line TM4. Mechanismly, the 26S proteasome inhibitors MG132 and bortezomib could effectively inhibit BIMEL degradation induced by As2O3 in BEAS-2B cells. As2O3 activated extracellular signal-regulated kinase (ERK) 1/2, c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinase (MAPK) signaling pathways, but only the ERK1/2 MAPK inhibitor PD98059 blocked BIMEL degradation induced by As2O3. Furthermore, As2O3 induced-phosphorylation of BIMEL at multiple sites was inhibited by ERK1/2 MAPK inhibitor PD98059. Inhibition of As2O3-induced ERK1/2 MAPK phosphorylation increased the levels of BIMEL and cleaved-caspase-3 proteins and decreased BEAS-2B cell viability. As2O3 also markedly mitigated tunicamycin-induced apoptosis of BEAS-2B cells by increasing ERK1/2 phosphorylation and BIMEL degradation. Our results suggest that As2O3-induced activation of the ERK1/2 MAPK pathway increases phosphorylation of BIMEL and promotes BIMEL degradation, thereby alleviating the role of apoptosis in As2O3-induced cell death. This study provides new insights into how to maintain the survival of BEAS-2B cells before malignant transformation induced by high doses of As2O3.
Collapse
|
2
|
Rodríguez Stewart RM, Raghuram V, Berry JTL, Joshi GN, Mainou BA. Noncanonical Cell Death Induction by Reassortant Reovirus. J Virol 2020; 94:e01613-20. [PMID: 32847857 PMCID: PMC7592226 DOI: 10.1128/jvi.01613-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 08/15/2020] [Indexed: 12/12/2022] Open
Abstract
Triple-negative breast cancer (TNBC) constitutes 10 to 15% of all breast cancer and is associated with worse prognosis than other subtypes of breast cancer. Current therapies are limited to cytotoxic chemotherapy, radiation, and surgery, leaving a need for targeted therapeutics to improve outcomes for TNBC patients. Mammalian orthoreovirus (reovirus) is a nonenveloped, segmented, double-stranded RNA virus in the Reoviridae family. Reovirus preferentially kills transformed cells and is in clinical trials to assess its efficacy against several types of cancer. We previously engineered a reassortant reovirus, r2Reovirus, that infects TNBC cells more efficiently and induces cell death with faster kinetics than parental reoviruses. In this study, we sought to understand the mechanisms by which r2Reovirus induces cell death in TNBC cells. We show that r2Reovirus infection of TNBC cells of a mesenchymal stem-like (MSL) lineage downregulates the mitogen-activated protein kinase/extracellular signal-related kinase pathway and induces nonconventional cell death that is caspase-dependent but caspase 3-independent. Infection of different MSL lineage TNBC cells with r2Reovirus results in caspase 3-dependent cell death. We map the enhanced oncolytic properties of r2Reovirus in TNBC to epistatic interactions between the type 3 Dearing M2 gene segment and type 1 Lang genes. These findings suggest that the genetic composition of the host cell impacts the mechanism of reovirus-induced cell death in TNBC. Together, our data show that understanding host and virus determinants of cell death can identify novel properties and interactions between host and viral gene products that can be exploited for the development of improved viral oncolytics.IMPORTANCE TNBC is unresponsive to hormone therapies, leaving patients afflicted with this disease with limited treatment options. We previously engineered an oncolytic reovirus (r2Reovirus) with enhanced infective and cytotoxic properties in TNBC cells. However, how r2Reovirus promotes TNBC cell death is not known. In this study, we show that reassortant r2Reovirus can promote nonconventional caspase-dependent but caspase 3-independent cell death and that the mechanism of cell death depends on the genetic composition of the host cell. We also map the enhanced oncolytic properties of r2Reovirus in TNBC to interactions between a type 3 M2 gene segment and type 1 genes. Our data show that understanding the interplay between the host cell environment and the genetic composition of oncolytic viruses is crucial for the development of efficacious viral oncolytics.
Collapse
Affiliation(s)
- Roxana M Rodríguez Stewart
- Emory University, Atlanta, Georgia, USA
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | | | - Jameson T L Berry
- Emory University, Atlanta, Georgia, USA
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | | | - Bernardo A Mainou
- Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
- Children's Healthcare of Atlanta, Atlanta, Georgia, USA
| |
Collapse
|
3
|
Changizi V, Azariasl S, Motevaseli E, Jafari Nodooshan S. Assessment Synergistic Effects of Integrated Therapy with Epigallocatechin-3-Gallate (EGCG) & Arsenic Trioxide and Irradiation on Breast Cancer Cell Line. IRANIAN JOURNAL OF PUBLIC HEALTH 2020; 49:1555-1563. [PMID: 33083333 PMCID: PMC7554386 DOI: 10.18502/ijph.v49i8.3901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Background: Breast cancer is the most common invasive malignancy among women in the world. The current breast cancer therapies pose significant clinical challenges. Low-dose chemotherapy represents a new strategy to treat solid tumors in combination with natural products such as green tea catechins. Epigallocatechin-3-gallate (EGCG) is the major polyphenolic extract from green tea with potent anticancer and antioxidant effects. The purpose of this study was to investigate the effects of EGCG, Arsenic trioxide (ATO) and gamma radiation on MCF-7 cell line. Methods: The anti-proliferative effects of EGCG and ATO individually, moreover in combination with radiation on MCF-7 cells were evaluated with MTT assay. The expression of apoptotic gens (Bax, Bcl-2, Caspase-3 and Fas) was assessed by real-time PCR. Results: Based on the results of MTT assay, EGCG and ATO exhibited dose and time-dependent anti-proliferative effects on MCF-7 cells. The combined therapy of EGCG and ATO in presence and absence radiation could rise cell death up to 80%. Moreover, integrated therapy made Bax up-regulated and Bcl-2 down- regulated. Conclusion: In assessment synergistic effects of integrated therapy with EGCG and ATO and irradiation had been significant impact on low dose chemotherapy for breast cancer treatment.
Collapse
Affiliation(s)
- Vahid Changizi
- Department of Technology of Radiology and Radiotherapy, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
| | - Samayeh Azariasl
- Department of Technology of Radiology and Radiotherapy, School of Allied Medical Sciences, Tehran University of Medical Sciences, Tehran, Iran
| | - Elahe Motevaseli
- Department of Molecular Medicine, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Saeedeh Jafari Nodooshan
- School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
4
|
Arsenic trioxide blocked proliferation and cardiomyocyte differentiation of human induced pluripotent stem cells: Implication in cardiac developmental toxicity. Toxicol Lett 2019; 309:51-58. [DOI: 10.1016/j.toxlet.2019.03.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Revised: 01/29/2019] [Accepted: 03/17/2019] [Indexed: 11/22/2022]
|
5
|
Zhang X, Yu D, Geng H, Li F, Lv L, Zhao L, Yan C, Li B. Dual effects of arsenic trioxide on tumor cells and the potential underlying mechanisms. Oncol Lett 2018; 16:3812-3820. [PMID: 30127993 PMCID: PMC6096270 DOI: 10.3892/ol.2018.9086] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 06/14/2018] [Indexed: 12/23/2022] Open
Abstract
The human ether-a-go-go related gene (hERG) encodes the rapid delayed rectifier K+ channel. hERG not only serves an important role in heart muscle and cardiomyocyte excitability by regulating action potential repolarization, but also represents a selective advantage for cancer cell proliferation. Arsenic trioxide is a traditional Chinese medicine, which has been previously identified as an efficient tumor suppressor, particularly in the treatment of acute pro-myelocytic leukemia. However, studies have also reported that long-term exposure to arsenicals may lead to the formation of malignant tumors. In the present study, the effect of low-dose arsenic trioxide on the proliferation and apoptosis of tumor cells was investigated, as were the potential underlying mechanisms of this effect. The data demonstrated that low-dose arsenic trioxide (0.1 µM) enhanced the viability and apoptosis of tumor cells expressing hERG channels following long-term incubation. However, in tumor cells lacking hERG channels, low-dose arsenic trioxide had no effect. Therefore, we hypothesized that this hormesis effect of low-dose arsenic trioxide on tumor cells may be associated with the hERG channel. Furthermore, low dose arsenic trioxide promoted the hERG-channel current by changing the kinetics of channel gating and prolonging the open-channel stage. Simultaneously, high-dose As2O3 (1 or 10 µM) significantly reduced the expression of hERG in tumor cells compared with the control group, which resulted in reduced proliferation rate and promotion of apoptotic rate. The results of the present study demonstrate that the dual effects of arsenic trioxide on hERG channels vary according to concentration, resulting in the dual effects on tumor cells. This provides a theoretical basis for the potential clinical application of arsenic trioxide, suggesting that hERG channels are an important target in preventing and treating tumorigenesis during arsenicosis.
Collapse
Affiliation(s)
- Xiao Zhang
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Dahai Yu
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Huaize Geng
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Fengmei Li
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Lin Lv
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Lei Zhao
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Caichuan Yan
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| | - Baoxin Li
- Department of Pharmacology, College of Pharmacy, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China.,The State-Province Key Laboratory of Biopharmaceutical Engineering, Harbin Medical University, Harbin, Heilongjiang 150086, P.R. China
| |
Collapse
|
6
|
Zhao Y, Ge CC, Wang J, Wu XX, Li XM, Li W, Wang SS, Liu T, Hou JZ, Sun H, Fang D, Xie SQ. MEK inhibitor, PD98059, promotes breast cancer cell migration by inducing β-catenin nuclear accumulation. Oncol Rep 2017; 38:3055-3063. [PMID: 29048617 DOI: 10.3892/or.2017.5955] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Accepted: 07/28/2017] [Indexed: 11/06/2022] Open
Abstract
Abnormal activation of the RAF/MEK/ERK signaling pathway has been observed in breast cancer. Thus, a number of MEK inhibitors have been designed as one treatment option for breast cancer. Although some studies have found that these MEK inhibitors inhibit the growth of a variety of human cancer cells, some trials have shown that the use of MEK inhibitors as a treatment for breast cancer does not adequately improve survival for unknown reasons. In the present study, MEK inhibitor PD98059 was used to evaluate its anticancer effects on human breast cancer MCF-7 and MDA-MB-231 cells and to explore the possible mechanism of action. Our results revealed that MEK inhibitor PD98059 exhibited antiproliferative effects in a dose- and time-dependent manner in MCF-7 and MDA-MB-231 breast cancer cells. Conversely, incubation of MCF-7 and MDA-MB-231 cells with PD98059 promoted their migration. Further investigation disclosed that the enhanced ability of migration promoted by PD98059 was dependent on β-catenin nuclear translocation in the MCF-7 and MDA-MB‑231 cells. Subsequent experiments documented that activation of EGFR signaling induced by PD98059 increased the amount of β-catenin in the nucleus. Taken together, our findings may elucidate a possible mechanism explaining the ineffectiveness of MEK inhibitors in breast cancer treatment and improve our understanding of the role of MEK in cancer.
Collapse
Affiliation(s)
- Ying Zhao
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Chao-Chao Ge
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Jun Wang
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Xiao-Xiao Wu
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Xiao-Min Li
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Wei Li
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Sha-Sha Wang
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Tong Liu
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Jiu-Zhou Hou
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Hua Sun
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Dong Fang
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| | - Song-Qiang Xie
- Institute of Chemical Biology, College of Pharmacy, Henan University, Kaifeng, Henan 475004, P.R. China
| |
Collapse
|
7
|
Wang S, Ma G, Zhu H, Lv C, Chu H, Tong N, Wu D, Qiang F, Gong W, Zhao Q, Tao G, Zhou J, Zhang Z, Wang M. miR-107 regulates tumor progression by targeting NF1 in gastric cancer. Sci Rep 2016; 6:36531. [PMID: 27827403 PMCID: PMC5101511 DOI: 10.1038/srep36531] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 10/17/2016] [Indexed: 12/20/2022] Open
Abstract
Our previous genome-wide miRNA microarray study revealed that miR-107 was upregulated in gastric cancer (GC). In this study we aimed to explore its biological role in the pathogenesis of GC. Integrating in silico prediction algorithms with western blotting assays revealed that miR-107 inhibition enhanced NF1 (neurofibromin 1) mRNA and protein levels, suggesting that NF1 is one of miR-107 targets in GC. Luciferase reporter assay revealed that miR-107 suppressed NF1 expression by binding to the first potential binding site within the 3′-UTR of NF1 mRNA. mRNA stable assay indicated this binding could result in NF1 mRNA instability, which might contribute to its abnormal protein expression. Functional analyses such as cell growth, transwell migration and invasion assays were used to investigate the role of interaction between miR-107 and its target on GC development and progression. Moreover, We investigated the association between the clinical phenotype and the status of miR-107 expression in 55 GC tissues, and found the high expression contributed to the tumor size and depth of invasion. The results exhibited that down regulation of miR-107 opposed cell growth, migration, and invasion, whereas NF1 repression promoted these phenotypes. Our findings provide a mechanism by which miR-107 regulates NF1 in GC, as well as highlight the importance of interaction between miR-107 and NF1 in GC development and progression.
Collapse
Affiliation(s)
- Shizhi Wang
- Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.,Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China.,Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, China
| | - Gaoxiang Ma
- Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.,Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Haixia Zhu
- Core Laboratory, Nantong Tumor Hospital, Nantong, China
| | - Chunye Lv
- Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.,Department of General Surgery, The Affiliated Jiangning Hospital of Nanjing Medical University, Nanjing, China
| | - Haiyan Chu
- Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.,Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Na Tong
- Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.,Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Dongmei Wu
- Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.,Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Fulin Qiang
- Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.,Core Laboratory, Nantong Tumor Hospital, Nantong, China
| | - Weida Gong
- Department of General Surgery, Yixing Cancer Hospital, Yixing, China
| | - Qinghong Zhao
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Guoquan Tao
- Department of General Surgery, Huai-An First People's Hospital Affiliated to Nanjing Medical University, Huai-An, China
| | - Jianwei Zhou
- Department of Molecular Cell Biology and Toxicology, Cancer Center, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Zhengdong Zhang
- Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.,Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Meilin Wang
- Department of Environmental Genomics, Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center For Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.,Department of Genetic Toxicology, the Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| |
Collapse
|
8
|
Subbarayan PR, Ardalan B. In the war against solid tumors arsenic trioxide needs partners. J Gastrointest Cancer 2015; 45:363-71. [PMID: 24825822 DOI: 10.1007/s12029-014-9617-8] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In the past decade, the therapeutic potential of arsenic trioxide (ATO) in the treatment of acute promyelocytic leukemia (APL) was recognized. This encouraged other investigators to test the efficacy of ATO in the management of other hematological and solid tumor malignancies. Notably, as a single agent, arsenic trioxide did not benefit patients diagnosed with solid tumors. However, when it was combined with other agents, treatment benefit emerged. In this article, we have summarized the outcome of clinical trials that used arsenic trioxide as a single agent as well as in combination settings in patients diagnosed with solid tumors. We have also reviewed possible additional mechanisms by which ATO may be useful as a chemosensitizer in combination therapy. We hope that our review will encourage clinical investigators to rationally combine ATO with additional chemotherapeutic agents in treating patients diagnosed with solid tumors.
Collapse
Affiliation(s)
- Pochi R Subbarayan
- Department of Medicine, University of Miami Miller School of Medicine, 1550 NW 10th Avenue, FOX 431A, Miami, FL, 33136, USA
| | | |
Collapse
|
9
|
Wang Y, Wang L, Yin C, An B, Hao Y, Wei T, Li L, Song G. Arsenic trioxide inhibits breast cancer cell growth via microRNA-328/hERG pathway in MCF-7 cells. Mol Med Rep 2015; 12:1233-8. [PMID: 25824027 DOI: 10.3892/mmr.2015.3558] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 03/03/2015] [Indexed: 11/05/2022] Open
Abstract
Arsenic trioxide (As2O3) has been widely used in the treatment of acute promyelocytic leukemia and has been observed to exhibit therapeutic effects in various types of solid tumor. In a previous study by this group, it was shown that As2O3 induces the apoptosis of MCF-7 breast cancer cells through inhibition of the human ether-à-go-go-related gene (hERG) channel. The present study was designed to further investigate the effect of As2O3 on breast cancer cells and to examine the mechanism underlying the regulation of hERG expression. The present study confirmed that As2O3 inhibited tumor growth in vivo, following MCF-7 cell implantation into nude mice. Using computational prediction , it was identified that microRNA (miR)-328 had a binding site in the 3'-untranslated region of hERG mRNA. A luciferase activity assay demonstrated that hERG is a target gene of miR-328. Further investigation using western blot analysis and reverse transcription-quantitative polymerase chain reaction revealed that As2O3 downregulated hERG expression via upregulation of miR-328 expression in MCF-7 cells. In conclusion, As2O3 was observed to inhibit breast cancer cell growth, at least in part, through the miR-328/hERG pathway.
Collapse
Affiliation(s)
- Ying Wang
- Medical Functional Laboratory, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
| | - Leqiu Wang
- Department of Otolaryngology, Hongqi Hospital of Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
| | - Changhao Yin
- Department of Neurology, Hongqi Hospital of Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
| | - Baizhu An
- Department of Anatomy, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
| | - Yankun Hao
- Medical Functional Laboratory, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
| | - Tao Wei
- Medical Functional Laboratory, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
| | - Li Li
- Medical Functional Laboratory, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
| | - Gaochen Song
- Medical Functional Laboratory, Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
| |
Collapse
|
10
|
Ong Q, Guo S, Zhang K, Cui B. U0126 protects cells against oxidative stress independent of its function as a MEK inhibitor. ACS Chem Neurosci 2015; 6:130-7. [PMID: 25544156 PMCID: PMC4304487 DOI: 10.1021/cn500288n] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
![]()
U0126 is a potent
and selective inhibitor of MEK1 and MEK2 kinases.
It has been widely used as an inhibitor for the Ras/Raf/MEK/ERK signaling
pathway with over 5000 references on the NCBI PubMed database. In
particular, U0126 has been used in a number of studies to show that
inhibition of the Raf/MEK/ERK pathway protects neuronal cells against
oxidative stress. Here, we report that U0126 can function as an antioxidant
that protects PC12 cells against a number of different oxidative-stress
inducers. This protective effect of U0126 is independent of its function
as a MEK inhibitor, as several other MEK inhibitors failed to show
similar protective effects. U0126 reduces reactive oxygen species
(ROS) in cells. We further demonstrate that U0126 is a direct ROS
scavenger in vitro, and the oxidation products of U0126 exhibit fluorescence.
Our finding that U0126 is a strong antioxidant signals caution for
its future usage as a MEK inhibitor and for interpreting some previous
results.
Collapse
Affiliation(s)
- Qunxiang Ong
- Department
of Chemistry, Stanford University, 380 Roth Way, Palo Alto, California 94305, United States
| | - Shunling Guo
- Department
of Chemistry, Stanford University, 380 Roth Way, Palo Alto, California 94305, United States
| | - Kai Zhang
- Department
of Chemistry, Stanford University, 380 Roth Way, Palo Alto, California 94305, United States
- Department
of Biochemistry, University of Illinois at Urbana−Champaign, 600 South Mathews, Urbana, Illinois 61801, United States
| | - Bianxiao Cui
- Department
of Chemistry, Stanford University, 380 Roth Way, Palo Alto, California 94305, United States
| |
Collapse
|
11
|
Chen X, Feng J, Ge Z, Chen H, Ding W, Zhu W, Tang X, Chen Y, Tan Y, Ma T. Effects of the JWA gene in the regulation of human breast cancer cells. Mol Med Rep 2015; 11:3848-53. [PMID: 25586271 DOI: 10.3892/mmr.2015.3188] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 11/07/2014] [Indexed: 11/06/2022] Open
Abstract
The present study aimed to investigate whether the JWA gene can regulate the proliferation, migration and invasion of human breast cancer cells through the MAPK signaling pathway. The role of JWA in proliferation, migration, invasion and apoptosis was investigated in the MDA‑MB‑231 human breast cancer cell line. Following transfection with JWA‑small interfering (si)RNA, the effect of JWA on apoptosis was assessed by Western blot analysis, proliferation was determined using Transwell chambers and cell migration and invasion were analyzed by transwell assay. The expression levels of extracellular signal‑regulated kinase (ERK) 1/2, CSBP/RK/Mpk2 kinase (p38) and c‑Jun N‑terminal kinase (JNK) were detected using Western blot analysis in the siRNA and control groups. The expression of JWA in the breast cancer cells was significantly lower compared with the normal breast cells. Downregulation of JWA protein levels reduced the apoptosis and enhanced proliferation, migration and invasion of the MDA‑MB‑231 cells in vitro. The results of the Western blot analysis demonstrated that, compared with the control groups, the expression levels of phosphorylated (p‑)p38 decreased significantly in the JWA siRNA group. No significant changes were observed in the expression levels of p‑ERK1/2 or p‑JNK. Therefore, the JWA gene may regulate human breast cancer cells through the MAPK signaling pathway using different types of regulation.
Collapse
Affiliation(s)
- Xiang Chen
- Department of General Surgery, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Jiake Feng
- Department of General Surgery, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Zhijun Ge
- Department of Critical Care Medicine, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Hong Chen
- Department of Oncology, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Weiliang Ding
- Central Laboratory, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Wenjiao Zhu
- Central Laboratory, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Xiaoyan Tang
- Department of General Surgery, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Yanyu Chen
- Department of General Surgery, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Yongfei Tan
- Department of Cardiac and Thoracic Surgery, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Tieliang Ma
- Central Laboratory, The Affiliated Yixing Hospital of Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| |
Collapse
|
12
|
YU YAO, YANG YU, WANG JING. Anti-apoptotic and apoptotic pathway analysis of arsenic trioxide-induced apoptosis in human gastric cancer SGC-7901 cells. Oncol Rep 2014; 32:973-8. [DOI: 10.3892/or.2014.3276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 05/28/2014] [Indexed: 11/05/2022] Open
|
13
|
Lin J, Ma T, Jiang X, Ge Z, Ding W, Wu Y, Jiang G, Feng J, Cui G, Tan Y. JWA regulates human esophageal squamous cell carcinoma and human esophageal cells through different mitogen-activated protein kinase signaling pathways. Exp Ther Med 2014; 7:1767-1771. [PMID: 24926382 PMCID: PMC4043574 DOI: 10.3892/etm.2014.1650] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 03/20/2014] [Indexed: 11/11/2022] Open
Abstract
The aim of the present study was to investigate whether the JWA gene regulates the proliferation, migration and invasion of human esophageal squamous cell carcinoma (ESCC) and normal human esophageal cell lines through mitogen-activated protein kinase (MAPK) signal transduction pathways. The role of JWA in proliferation, migration, invasion and apoptosis was investigated in the Eca109 human ESCC and HET-1A normal human esophageal cell lines via transfection with JWA-small interfering (si)RNA. Western blot analysis was conducted to observe the effect of JWA on apoptosis and the regulatory effect of JWA on proliferation was determined using a thiazolyl blue tetrazolium bromide (MTT) assay. Cellular migration and invasion were analyzed via a Transwell assay. In addition, the expression levels of extracellular signal-regulated protein kinases 1 and 2 (ERK1/2), c-Jun N-terminal kinase (JNK) and p38 MAPK following JWA-siRNA transfection were detected by western blot analysis and compared with those of untreated cells. The downregulation of JWA protein decreased apoptosis and increased the proliferation, migration and invasion of the Eca109 and HET-1A cell lines. In the Eca109 cell line, the expression levels of phosphorylated (p)-ERK1/2 and p-JNK, but not those of p-p38, decreased significantly in the JWA siRNA group compared with those in the control groups. However, in the HET-1A cell line, JWA-siRNA transfection significantly inhibited the expression of p-p38 and demonstrated no effect on the expression levels of p-ERK1/2 and p-JNK. In conclusion, the JWA gene may regulate the ESCC and human esophageal cell lines through MAPK signaling pathways via different regulatory mechanisms.
Collapse
Affiliation(s)
- Jie Lin
- Department of Cardiac and Thoracic Surgery, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Tieliang Ma
- Central Laboratory, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Xiaodong Jiang
- Department of Oncology, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Zhijun Ge
- Department of Critical Care Medicine, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Weiliang Ding
- Central Laboratory, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Yuanyuan Wu
- Department of Gastroenterology, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Guojun Jiang
- Department of Cardiac and Thoracic Surgery, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Jiake Feng
- Department of General Surgery, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Guoxing Cui
- Department of Gastroenterology, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| | - Yongfei Tan
- Department of Cardiac and Thoracic Surgery, Affiliated Yixing People's Hospital, Jiangsu University, Yixing, Jiangsu 214200, P.R. China
| |
Collapse
|
14
|
Regulatory Effects of Arsenic on Cellular Signaling Pathways: Biological Effects and Therapeutic Implications. NUCLEAR SIGNALING PATHWAYS AND TARGETING TRANSCRIPTION IN CANCER 2014. [DOI: 10.1007/978-1-4614-8039-6_5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
|
15
|
Liu W, Gong Y, Li H, Jiang G, Zhan S, Liu H, Wu Y. Arsenic trioxide-induced growth arrest of breast cancer MCF-7 cells involving FOXO3a and IκB kinase β expression and localization. Cancer Biother Radiopharm 2012; 27:504-12. [PMID: 22988968 DOI: 10.1089/cbr.2012.1162] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Currently, arsenic has been clinically investigated as a therapeutic agent for a variety of solid malignancies, including breast cancer. However, the exact underlying molecular mechanisms through which arsenic trioxide (As(2)O(3)) induces cell growth arrest and apoptosis in solid tumors have not been clearly understood. The aim of our study was to gain an insight into the effect of As(2)O(3) on the human breast cancer MCF-7 cell line and investigate cell growth inhibition, apoptosis, and the molecular mechanism after As(2)O(3) treatment in MCF-7 cells. Expression of FOXO3a, nuclear-FOXO3a, caspase-3, and IκB kinase β (IKKβ) mRNA levels in MCF-7 cells was determined by reverse transcription-polymerase chain reaction (RT-PCR). The protein expression was examined by the Western blot analysis and immunocytochemical staining. The distribution of apoptotic cells was assessed by flow cytometry, and the morphology of the apoptotic cells was investigated by Hoechest33258 staining. Our results showed that As(2)O(3) significantly induced the apoptosis of MCF-7 cells tested in this study in a dose-dependent manner. As(2)O(3) induced the decrease of IKKβ expression and the increase of total as well as nuclear FOXO3a expression, which triggered the phosphorylation of cytoplasmic FOXO3a at the Thr32 residue decrease. RT-PCR, Western blot analysis, and immunocytochemistry revealed that the expression of IKKβ in MCF-7 cells was upregulated when As(2)O(3) was combined with tumor necrosis factor-α (TNF-α), whereas the expression of FOXO3a was downregulated in comparison with the As(2)O(3)-alone group. These findings indicated a specific molecular mechanism by which MCF-7 cell lines were susceptible to the As(2)O(3) therapy through FOXO3a expression and localization. This FOXO3a accumulation may be well correlated with the As(2)O(3)-induced reduction of active IKKβ, which may provide new insights into As(2)O(3)-related signaling activities.
Collapse
Affiliation(s)
- Wenlou Liu
- Department of Pathology, Xuzhou Medical College, Xuzhou, China
| | | | | | | | | | | | | |
Collapse
|
16
|
Wu CC, D'Argenio D, Asgharzadeh S, Triche T. TARGETgene: a tool for identification of potential therapeutic targets in cancer. PLoS One 2012; 7:e43305. [PMID: 22952662 PMCID: PMC3432038 DOI: 10.1371/journal.pone.0043305] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 07/18/2012] [Indexed: 11/19/2022] Open
Abstract
The vast array of in silico resources and data of high throughput profiling currently available in life sciences research offer the possibility of aiding cancer gene and drug discovery process. Here we propose to take advantage of these resources to develop a tool, TARGETgene, for efficiently identifying mutation drivers, possible therapeutic targets, and drug candidates in cancer. The simple graphical user interface enables rapid, intuitive mapping and analysis at the systems level. Users can find, select, and explore identified target genes and compounds of interest (e.g., novel cancer genes and their enriched biological processes), and validate predictions using user-defined benchmark genes (e.g., target genes detected in RNAi screens) and curated cancer genes via TARGETgene. The high-level capabilities of TARGETgene are also demonstrated through two applications in this paper. The predictions in these two applications were then satisfactorily validated by several ways, including known cancer genes, results of RNAi screens, gene function annotations, and target genes of drugs that have been used or in clinical trial in cancer treatments. TARGETgene is freely available from the Biomedical Simulations Resource web site (http://bmsr.usc.edu/Software/TARGET/TARGET.html).
Collapse
Affiliation(s)
- Chia-Chin Wu
- Department of Genomic Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America.
| | | | | | | |
Collapse
|
17
|
Pupo M, Pisano A, Lappano R, Santolla MF, De Francesco EM, Abonante S, Rosano C, Maggiolini M. Bisphenol A induces gene expression changes and proliferative effects through GPER in breast cancer cells and cancer-associated fibroblasts. ENVIRONMENTAL HEALTH PERSPECTIVES 2012; 120:1177-82. [PMID: 22552965 PMCID: PMC3440081 DOI: 10.1289/ehp.1104526] [Citation(s) in RCA: 209] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Accepted: 05/02/2012] [Indexed: 05/24/2023]
Abstract
BACKGROUND Bisphenol A (BPA) is the principal constituent of baby bottles, reusable water bottles, metal cans, and plastic food containers. BPA exerts estrogen-like activity by interacting with the classical estrogen receptors (ERα and ERβ) and through the G protein-coupled receptor (GPR30/GPER). In this regard, recent studies have shown that GPER was involved in the proliferative effects induced by BPA in both normal and tumor cells. OBJECTIVES We studied the transduction signaling pathways through which BPA influences cell proliferation and migration in human breast cancer cells and cancer-associated fibroblasts (CAFs). METHODS AND RESULTS We used as a model system SKBR3 breast cancer cells and CAFs that lack the classical ERs. Specific pharmacological inhibitors and gene-silencing procedures were used to show that BPA induces the expression of the GPER target genes c-FOS, EGR-1, and CTGF through the GPER/EGFR/ERK transduction pathway in SKBR3 breast cancer cells and CAFs. Moreover, we observed that GPER is required for growth effects and migration stimulated by BPA in both cell types. CONCLUSIONS Results indicate that GPER is involved in the biological action elicited by BPA in breast cancer cells and CAFs. Hence, GPER-mediated signaling should be included among the transduction mechanisms through which BPA may stimulate cancer progression.
Collapse
Affiliation(s)
- Marco Pupo
- Department of Pharmaco-Biology, University of Calabria, Rende, Italy
| | | | | | | | | | | | | | | |
Collapse
|
18
|
An YT, Zhu P, Zhong Y, Sheng YC, Zhao Z, Min Y, Xia YY. A neuroprotective mechanism of YGY-E in cerebral ischemic injury in rats. CNS Neurosci Ther 2012; 18:14-20. [PMID: 22280158 DOI: 10.1111/j.1755-5949.2011.00277.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
AIMS To investigate the anticerebral ischemic properties of YGY-E (apigenin-7-O-β-D-glucopyranosy l-4'-O-α-L-rhamnopy-ranosid, a flavonoid glycoside extracted from plant phoenix-tail fern), focusing on its effects on neuronal apoptosis. METHODS In vitro YGY-E treatment was examined in primary cultured rat hippocampal neurons subjected to hypoxia-reoxygenation (H-R) injury. In addition, in vivo effects of YGY-E on neuronal apoptosis were measured by Hoechst staining and in situ DNA end labeling (TUNEL). Finally, B cell lymphoma/lewkmia-2 (Bcl-2) level in ischemic rat brain tissue was evaluated with immunohistochemistry and western blot analyses. RESULTS In vitro YGY-E (50-100 μg/mL) treatment increased the survival rate compared to that of the vehicle-treated group (P < 0.05 and P < 0.01, respectively). In in vivo experiments, YGY-E (2.5-10 mg/kg) decreased the percentage of apoptotic neurons (P < 0.01), increased Bcl-2 (P < 0.01) in ischemic rat brain tissue. These effects were dose dependent. CONCLUSIONS Our findings indicate that YGY-E's neuroprotective effects may be because of its inhibition of neuronal apoptosis by increasing Bcl-2 expression.
Collapse
Affiliation(s)
- Yong-Tong An
- State Key Laboratory of New Drug & Pharmaceutical Process, Shanghai Institute of Pharmaceutical Industry, China
| | | | | | | | | | | | | |
Collapse
|
19
|
Beezhold K, Liu J, Kan H, Meighan T, Castranova V, Shi X, Chen F. miR-190-mediated downregulation of PHLPP contributes to arsenic-induced Akt activation and carcinogenesis. Toxicol Sci 2011; 123:411-20. [PMID: 21750348 DOI: 10.1093/toxsci/kfr188] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The role of trivalent arsenic (As(3+)) on the regulation of the recently identified noncoding small RNAs, mainly microRNAs, has not been explored so far. In the present study, we provide evidence showing that As(3+) is a potent inducer for the expression of miR-190 in human bronchial epithelial cells. The induction of miR-190 by As(3+) is concentration dependent and associated with the expression of the host gene of miR-190, talin 2, a gene encoding a high-molecular-weight cytoskeletal protein. The elevated level of miR-190 induced by As(3+) is capable of downregulating the translation of the PH domain leucine-rich repeat protein phosphatase (PHLPP), a negative regulator of Akt signaling. Such a downregulation is occurred through direct interaction of the miR-190 with the 3'-UTR region of the PHLPP mRNA, leading to a diminished PHLPP protein expression and consequently, an enhanced Akt activation and expression of vascular endothelial growth factor, an Akt-regulated protein. Overexpression of miR-190 itself is able to enhance proliferation and malignant transformation of the cells as determined by anchorage-independent growth of the cells in soft agar. Accordingly, the data presented suggest that induction of miR-190 is one of the key mechanisms in As(3+)-induced carcinogenesis.
Collapse
Affiliation(s)
- Kevin Beezhold
- The Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, USA
| | | | | | | | | | | | | |
Collapse
|
20
|
Liu Y, Hock JM, Sullivan C, Fang G, Cox AJ, Davis KT, Davis BH, Li X. Activation of the p38 MAPK/Akt/ERK1/2 signal pathways is required for the protein stabilization of CDC6 and cyclin D1 in low-dose arsenite-induced cell proliferation. J Cell Biochem 2011; 111:1546-55. [PMID: 20862710 DOI: 10.1002/jcb.22886] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Arsenic trioxide (ATO) is a first-line anti-cancer agent for acute promyelocytic leukemia, and induces apoptosis in other solid cancer cell lines including breast cancer cells. However, as with arsenites found in drinking water and used as raw materials for wood preservatives, insecticides, and herbicides, low doses of ATO can induce carcinogenesis after long-term exposure. At 24 h after exposure, ATO (0.01-1 µM) significantly increased cell proliferation and promoted cell cycle progression from the G1 to S/G2 phases in the non-tumorigenic MCF10A breast epithelial cell line. The expression of 14 out of 96 cell-cycle-associated genes significantly increased, and seven of these genes including cell division cycle 6 (CDC6) and cyclin D1 (CCND1) were closely related to cell cycle progression from G1 to S phase. Low-dose ATO steadily increased gene transcript and protein levels of both CDC6 and cyclin D1 in a dose- and time-dependent manner. Low-dose ATO produced reactive oxygen species (ROS), and activated the p38 MAPK, Akt, and ERK1/2 pathways at different time points within 60 min. Small molecular inhibitors and siRNAs inhibiting the activation of p38 MAPK, Akt, and ERK1/2 decreased the ATO-increased expression of CDC6 protein. Inhibiting the activation of Akt and ERK1/2, but not p38 MAPK, decreased the ATO-induced expression of cyclin D1 protein. This study reports for the first time that p38 MAPK/Akt/ERK1/2 activation is required for the protein stabilization of CDC6 in addition to cyclin D1 in ATO-induced cell proliferation and cell cycle modulation from G1 to S phase.
Collapse
Affiliation(s)
- Youhong Liu
- Maine Institute for Human Genetics and Health, 246 Sylvan Road, Maine 04401, USA
| | | | | | | | | | | | | | | |
Collapse
|
21
|
Wang Y, Zhang Y, Yang L, Cai B, Li J, Zhou Y, Yin L, Yang L, Yang BF, Lu YJ. Arsenic trioxide induces the apoptosis of human breast cancer MCF-7 cells through activation of caspase-3 and inhibition of HERG channels. Exp Ther Med 2011; 2:481-486. [PMID: 22977528 DOI: 10.3892/etm.2011.224] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Accepted: 02/28/2011] [Indexed: 01/27/2023] Open
Abstract
Arsenic trioxide (As(2)O(3)) has been widely used to treat patients with acute promyelocytic leukemia and has also been shown to exhibit therapeutic effects on various types of solid tumors, including gastric cancer and lung carcinoma. Breast cancer is a type of solid tumor whose incidence has been increasing for many years. The present study was designed to investigate the effects of As(2)O(3) on the human breast cancer cell line MCF-7, and to explore its potential mechanisms. The MTT assay demonstrated that As(2)O(3) decreased the cellular viability of MCF-7 cells in a concentration-dependent manner. Morphological observation, the TUNEL assay and flow cytometric analysis revealed that apoptosis was involved in the process. An assay for caspase-3 activity suggested that the apoptosis was mediated through caspase-3 activation. Further investigation indicated that protein levels of the human ether-a-go-go-related gene (HERG) were markedly downregulated by As(2)O(3). Taken together, the results indicate that arsenic trioxide induces the apoptosis of human breast cancer MCF-7 cells at least in part through the activation of caspase-3 and the decrease in HERG expression.
Collapse
Affiliation(s)
- Ying Wang
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine and Pharmaceutics, and
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Eguchi R, Fujimori Y, Takeda H, Tabata C, Ohta T, Kuribayashi K, Fukuoka K, Nakano T. Arsenic trioxide induces apoptosis through JNK and ERK in human mesothelioma cells. J Cell Physiol 2010; 226:762-8. [DOI: 10.1002/jcp.22397] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
23
|
Arsenic trioxide as an anti-tumour agent: mechanisms of action and strategies of sensitization. J Appl Biomed 2010. [DOI: 10.2478/v10136-009-0027-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
|
24
|
Essential role of cell cycle regulatory genes p21 and p27 expression in inhibition of breast cancer cells by arsenic trioxide. Med Oncol 2010; 28:1225-54. [PMID: 20458559 DOI: 10.1007/s12032-010-9552-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Accepted: 04/22/2010] [Indexed: 12/18/2022]
Abstract
Arsenic trioxide (As2O3), a component of traditional Chinese medicine, has been used successfully for the treatment of acute promyelocytic leukemia (APL), and As2O3 is of potential therapeutic value for the treatment of other promyelocytic malignancies and some solid tumors including breast cancer. However, the precise molecular mechanisms through which As2O3 induces cell cycle arrest and apoptosis in solid tumors have not been clearly understood. The goal of our study is to gain insight into the general biological processes and molecular functions that are altered by As2O3 treatment in MCF-7 breast cancer cells and to identify the key signaling processes that are involved in the regulation of these physiological effects. In the present study, MCF-7 cells were treated with 5 μM As2O3, and the differential gene expression was then analyzed by DNA microarray. The results showed that As2O3 treatment changed the expression level of several genes that involved in cell cycle regulation, signal transduction, and apoptosis. Notably, As2O3 treatment increased the mRNA and protein levels of the cell cycle inhibitory proteins, p21 and p27. Interestingly, knocking down p21 or p27 individually did not alter As2O3-induced apoptosis and cell cycle arrest; however, the simultaneous down-regulation of both p21 and p27 resulted in attenuating of G1, G2/M arrest and reduction in apoptosis, thus indicating that p21 and p27 as the primary molecular targets of As2O3 against breast cancer. Overall, our results provide new insights into As2O3-related signaling activities, which may facilitate the development of As2O3-based anticancer strategies and/or combination therapies against solid tumors.
Collapse
|
25
|
The effects of arsenic trioxide on DNA synthesis and genotoxicity in human colon cancer cells. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2010; 7:2018-32. [PMID: 20623008 PMCID: PMC2898033 DOI: 10.3390/ijerph7052018] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2010] [Revised: 02/26/2010] [Accepted: 04/03/2010] [Indexed: 01/22/2023]
Abstract
Colon cancer is the third leading cause of cancer-related deaths worldwide. Recent studies in our laboratory have demonstrated that arsenic trioxide is cytotoxic in human colon cancer (HT-29), lung (A549) and breast (MCF-7) carcinoma cells. The purpose of the present study is to investigate the effects of arsenic trioxide on DNA synthesis and the possible genotoxic effects on human colon cancer cells. HT-29 cells were cultured according to standard protocol, followed by exposure to various doses (0, 2, 4, 6, 8, 10, and 12 μg/mL) of arsenic trioxide for 24 h. The proliferative response (DNA synthesis) to arsenic trioxide was assessed by [3H]thymidine incorporation. The genotoxic effects of arsenic-induced DNA damage in a human colon cancer cell line was evaluated by the alkaline single cell gel electrophoresis. Results indicated that arsenic trioxide affected DNA synthesis in HT-29 cells in a biphasic manner; showing a slight but not significant increase in cell proliferation at lower levels of exposure (2, 4 and 6 μg/mL) followed by a significant inhibition of cell proliferation at higher doses (i.e., 8 and 10 μg/mL). The study also confirmed that arsenic trioxide exposure caused genotoxicity as revealed by the significant increase in DNA damage, comet tail-lengths, and tail moment when compared to non-exposed cells. Results of the [3H]thymidine incorporation assay and comet assay revealed that exposure to arsenic trioxide affected DNA synthesis and exhibited genotoxic effects in human colon cancer cells.
Collapse
|
26
|
Bae-Jump VL, Chunxiao Zhou, Boggess JF, Gehrig PA. Arsenic Trioxide (As2O3) Inhibits Expression of Estrogen Receptor—alpha Through Regulation of the Mitogen-activated Protein Kinase (MAPK) Pathway in Endometrial Cancer Cells. Reprod Sci 2008; 15:1011-7. [DOI: 10.1177/1933719108324134] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Victoria L. Bae-Jump
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of North Carolina, Chapel Hill, North Carolina,
| | - Chunxiao Zhou
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of North Carolina, Chapel Hill, North Carolina
| | - John F. Boggess
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of North Carolina, Chapel Hill, North Carolina
| | - Paola A. Gehrig
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of North Carolina, Chapel Hill, North Carolina
| |
Collapse
|
27
|
Wen J, Cheng HY, Feng Y, Rice L, Liu S, Mo A, Huang J, Zu Y, Ballon DJ, Chang CC. P38 MAPK inhibition enhancing ATO-induced cytotoxicity against multiple myeloma cells. Br J Haematol 2007; 140:169-80. [DOI: 10.1111/j.1365-2141.2007.06895.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
28
|
Zhou J, Meng R, Sui X, Li W, Yang B. Various tolerances to arsenic trioxide between human cortical neurons and leukemic cells. ACTA ACUST UNITED AC 2006; 49:567-72. [PMID: 17312995 DOI: 10.1007/s11427-006-2034-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Arsenic trioxide (As2O3) is very effective for treatment of acute promyelocytic leukaemia (APL) but little can pass through the blood-brain-barrier (BBB), which limits its use in the prevention and treatment of central nervous system leukaemia (CNSL). Before creating a non-invasive method to help As2O3 's access, the safe and effective therapeutic concentration of As2O3 in the CNS ought to be known. The changes of apoptosis biomarkers, [Ca2+]i and PKC activity of both leukaemia cells and human cortical neurons, were monitored before and after being treated with As2O3 in vitro with laser confocal microscopy and Western blot. NSE concentration, the neuron invasive biomarker, was monitored by enzyme immunoassay (NSE-EIA). This study revealed that cortical neuron was more tolerable to As2O3 compared to NB4. 1.0 micromol / L As2O3 showed little influence on cortical neuron but effectively promoted apoptosis and induced differentiation of NB4.
Collapse
Affiliation(s)
- Jin Zhou
- The First Hospital of Harbin Medical University, Harbin 150001, China.
| | | | | | | | | |
Collapse
|