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Zheng X, Zhang S, Ma H, Dong Y, Zheng J, Zeng L, Liu J, Dai Y, Yin Q. Replenishment of TCA cycle intermediates and long-noncoding RNAs regulation in breast cancer. Mol Cell Endocrinol 2024:112321. [PMID: 38936596 DOI: 10.1016/j.mce.2024.112321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 03/13/2024] [Accepted: 06/24/2024] [Indexed: 06/29/2024]
Abstract
The tricarboxylic acid (TCA) cycle is an essential interface that coordinates cellular metabolism and is as a primary route determining the fate of a variety of fuel sources, including glucose, fatty acid and glutamate. The crosstalk of nutrients replenished TCA cycle regulates breast cancer (BC) progression by changing substrate levels-induced epigenetic alterations, especially the methylation, acetylation, succinylation and lactylation. Long non-coding RNAs (lncRNA) have dual roles in inhibiting or promoting energy reprogramming, and so altering the metabolic flux of fuel sources to the TCA cycle, which may regulate epigenetic modifications at the cellular level of BC. This narrative review discussed the central role of the TCA cycle in interconnecting numerous fuels and the induced epigenetic modifications, and the underlying regulatory mechanisms of lncRNAs in BC.
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Affiliation(s)
- Xuewei Zheng
- Precision Medicine Laboratory, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, China
| | - ShunShun Zhang
- Precision Medicine Laboratory, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, China
| | - HaoDi Ma
- Precision Medicine Laboratory, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, China
| | - Yirui Dong
- Precision Medicine Laboratory, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, China
| | - Jiayu Zheng
- Precision Medicine Laboratory, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, China
| | - Li Zeng
- Precision Medicine Laboratory, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, China
| | - Jiangbo Liu
- Department of General Surgery, First Affiliated Hospital, College of Clinical Medicine, Henan University of Science and Technology, Luoyang, China
| | - Yanzhenzi Dai
- Animal Science, School of Biosciences, University of Nottingham, UK.
| | - Qinan Yin
- Precision Medicine Laboratory, School of Medical Technology and Engineering, Henan University of Science and Technology, Luoyang, China.
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2
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Wang L, Wang W, Cai Y, Zhou Y, Jiang J, Ning Y, Shui C, Sun R, Wang Y, Li C. RETRACTED ARTICLE: Circ-NUP214 Promotes Papillary Thyroid Carcinoma Tumorigenesis by Regulating HK2 Expression Through miR-15a-5p. Biochem Genet 2022; 60:1408. [PMID: 35099648 DOI: 10.1007/s10528-022-10192-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Accepted: 01/18/2022] [Indexed: 01/15/2023]
Affiliation(s)
- Ling Wang
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Southwest Medical University, No. 55, 4th Section of Southern Renmin Road, Chengdu, Sichuan, China
- Department of Otorhinolaryngology Head and Neck Surgery, The First Affiliated Hospital of Chengdu Medical College, Chengdu, Sichuan, China
| | - Wei Wang
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Chengdu, Sichuan, China
| | - Yongcong Cai
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Chengdu, Sichuan, China
| | - Yuqiu Zhou
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Chengdu, Sichuan, China
| | - Jian Jiang
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Chengdu, Sichuan, China
| | - Yudong Ning
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Chengdu, Sichuan, China
| | - Chunyan Shui
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Chengdu, Sichuan, China
| | - Ronghao Sun
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Chengdu, Sichuan, China
| | - Yi Wang
- Department of Otorhinolaryngology Head and Neck Surgery, The First Affiliated Hospital of Chengdu Medical College, Chengdu, Sichuan, China
| | - Chao Li
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Southwest Medical University, No. 55, 4th Section of Southern Renmin Road, Chengdu, Sichuan, China.
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Chengdu, Sichuan, China.
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3
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Heslop KA, Burger P, Kappler C, Solanki AK, Gooz M, Peterson YK, Mills C, Benton T, Duncan SA, Woster PM, Maldonado EN. Small molecules targeting the NADH-binding pocket of VDAC modulate mitochondrial metabolism in hepatocarcinoma cells. Biomed Pharmacother 2022; 150:112928. [PMID: 35447542 PMCID: PMC9400819 DOI: 10.1016/j.biopha.2022.112928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/25/2022] [Accepted: 04/05/2022] [Indexed: 11/18/2022] Open
Abstract
Voltage dependent anion channels (VDAC) control the flux of most anionic respiratory substrates, ATP, ADP, and small cations, crossing the outer mitochondrial membrane. VDAC closure contributes to the partial suppression of mitochondrial metabolism that favors the Warburg phenotype of cancer cells. Recently, it has been shown that NADH binds to a specific pocket in the inner surface of VDAC1, also conserved in VDAC2 and 3, closing the channel. We hypothesized that binding of small molecules to the NADH pocket, maintain VDAC in an open configuration by preventing closure induced by NADH and possible other endogenous regulators. We screened in silico, the South Carolina Compound Collection SC3 (~ 100,000 proprietary molecules), using shape-based queries of the NADH binding region of VDAC. After molecular docking of selected compounds, we physically screened candidates using mitochondrial membrane potential (ΔΨm), as an overall readout of mitochondrial metabolism. We identified SC18, as the most potent compound. SC18 bound to VDAC1, as assessed by a thermal shift assay. Short-term treatment with SC18 decreased ΔΨm in SNU-449 and HepG2 human hepatocarcinoma cells. Mitochondrial depolarization was similar in wild type, VDAC1/2, 1/3, and 2/3 double KO HepG2 cells indicating that the effect of SC18 was not VDAC isoform-dependent. In addition, SC18 decreased mitochondrial NADH and cellular ATP production; and increased basal respiration. Long-term exposure to SC18, decreased cell proliferation as determined by wound-healing and cell viability assays. In summary, SC18 is a novel VDAC-targeting small molecule that induces mitochondrial dysfunction and inhibits cell proliferation.
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Affiliation(s)
- Kareem A Heslop
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Pieter Burger
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Christiana Kappler
- Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC, USA
| | - Ashish K Solanki
- Nephrology Division, Medical University of South Carolina, Charleston, SC, USA
| | - Monika Gooz
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Yuri K Peterson
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Catherine Mills
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Thomas Benton
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Stephen A Duncan
- Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC, USA
| | - Patrick M Woster
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Eduardo N Maldonado
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA; Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA.
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4
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Heslop KA, Milesi V, Maldonado EN. VDAC Modulation of Cancer Metabolism: Advances and Therapeutic Challenges. Front Physiol 2021; 12:742839. [PMID: 34658929 PMCID: PMC8511398 DOI: 10.3389/fphys.2021.742839] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 08/25/2021] [Indexed: 12/16/2022] Open
Abstract
Most anionic metabolites including respiratory substrates, glycolytic adenosine triphosphate (ATP), and small cations that enter mitochondria, and mitochondrial ATP moving to the cytosol, cross the outer mitochondrial membrane (OMM) through voltage dependent anion channels (VDAC). The closed states of VDAC block the passage of anionic metabolites, and increase the flux of small cations, including calcium. Consequently, physiological or pharmacological regulation of VDAC opening, by conditioning the magnitude of both anion and cation fluxes, is a major contributor to mitochondrial metabolism. Tumor cells display a pro-proliferative Warburg phenotype characterized by enhanced aerobic glycolysis in the presence of partial suppression of mitochondrial metabolism. The heterogeneous and flexible metabolic traits of most human tumors render cells able to adapt to the constantly changing energetic and biosynthetic demands by switching between predominantly glycolytic or oxidative phenotypes. Here, we describe the biological consequences of changes in the conformational state of VDAC for cancer metabolism, the mechanisms by which VDAC-openers promote cancer cell death, and the advantages of VDAC opening as a valuable pharmacological target. Particular emphasis is given to the endogenous regulation of VDAC by free tubulin and the effects of VDAC-tubulin antagonists in cancer cells. Because of its function and location, VDAC operates as a switch to turn-off mitochondrial metabolism (closed state) and increase aerobic glycolysis (pro-Warburg), or to turn-on mitochondrial metabolism (open state) and decrease glycolysis (anti-Warburg). A better understanding of the role of VDAC regulation in tumor progression is relevant both for cancer biology and for developing novel cancer chemotherapies.
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Affiliation(s)
- Kareem A Heslop
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, SC, United States
| | - Veronica Milesi
- Facultad de Ciencias Exactas, Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP), UNLP, CONICET, CIC PBA, La Plata, Argentina
| | - Eduardo N Maldonado
- Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, SC, United States.,Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, United States
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Huang X, Chen L, Li Z, Zheng B, Liu N, Fang Q, Jiang J, Rao T, Ouyang D. The efficacy and toxicity of antineoplastic antimetabolites: Role of gut microbiota. Toxicology 2021; 460:152858. [PMID: 34273448 DOI: 10.1016/j.tox.2021.152858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 07/01/2021] [Accepted: 07/12/2021] [Indexed: 02/06/2023]
Abstract
The incidence and mortality of cancer are rapidly growing all over the world. Nowadays, antineoplastic antimetabolites still play a key role in the chemotherapy of cancer. However, the interindividual variations in the efficacy and toxicity of antineoplastic antimetabolites are nonnegligible challenges to their clinical applications. Although many studies have focused on genetic variation, the reasons for these interindividual variations have still not been fully understood. Gut microbiota is reported to be associated with the efficacy and toxicity of antineoplastic antimetabolites. In this review, we summarize the interaction of antineoplastic antimetabolites on gut microbiota and the influences of shifted gut microbiota profiles on the efficacy and toxicity of antineoplastic antimetabolites. The factors affecting the efficacy and toxicity of antineoplastic antimetabolites via gut microbiota are also discussed. In addition, we present our viewpoints that regulating the gut microbiota may increase the efficacy and decrease the toxicity of antineoplastic antimetabolites. This will help us better understand the new mechanism via gut microbiota and promote individualized use of antineoplastic antimetabolites.
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Affiliation(s)
- Xinyi Huang
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Hunan Key Laboratory of Pharmacogenetics, 110 Xiangya Road, Changsha, 410078, PR China
| | - Lulu Chen
- Hunan Key Laboratory for Bioanalysis of Complex Matrix Samples, Changsha Duxact Biotech Co., Ltd., Changsha, 411000, PR China
| | - Zhenyu Li
- National Clinical Research Center for Geriatric Disorders, 87 Xiangya Road, Changsha, 410008, Hunan, PR China; Department of Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, PR China
| | - Binjie Zheng
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Hunan Key Laboratory of Pharmacogenetics, 110 Xiangya Road, Changsha, 410078, PR China
| | - Na Liu
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Hunan Key Laboratory of Pharmacogenetics, 110 Xiangya Road, Changsha, 410078, PR China
| | - Qing Fang
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Hunan Key Laboratory of Pharmacogenetics, 110 Xiangya Road, Changsha, 410078, PR China
| | - Jinsheng Jiang
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Hunan Key Laboratory of Pharmacogenetics, 110 Xiangya Road, Changsha, 410078, PR China; Sanjin Group Hunan Sanjin Pharmaceutical Co., Ltd., 320 Deshan Road, Hunan, 415000, PR China
| | - Tai Rao
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Hunan Key Laboratory of Pharmacogenetics, 110 Xiangya Road, Changsha, 410078, PR China.
| | - Dongsheng Ouyang
- Institute of Clinical Pharmacology, Xiangya Hospital, Central South University, Hunan Key Laboratory of Pharmacogenetics, 110 Xiangya Road, Changsha, 410078, PR China.
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6
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Zhang Q, Hu C, Huang J, Liu W, Lai W, Leng F, Tang Q, Liu Y, Wang Q, Zhou M, Sheng F, Li G, Zhang R. ROCK1 induces dopaminergic nerve cell apoptosis via the activation of Drp1-mediated aberrant mitochondrial fission in Parkinson's disease. Exp Mol Med 2019; 51:1-13. [PMID: 31578315 PMCID: PMC6802738 DOI: 10.1038/s12276-019-0318-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 06/22/2019] [Accepted: 06/28/2019] [Indexed: 12/19/2022] Open
Abstract
Dopamine deficiency is mainly caused by apoptosis of dopaminergic nerve cells in the substantia nigra of the midbrain and the striatum and is an important pathologic basis of Parkinson’s disease (PD). Recent research has shown that dynamin-related protein 1 (Drp1)-mediated aberrant mitochondrial fission plays a crucial role in dopaminergic nerve cell apoptosis. However, the upstream regulatory mechanism remains unclear. Our study showed that Drp1 knockdown inhibited aberrant mitochondrial fission and apoptosis. Importantly, we found that ROCK1 was activated in an MPP+-induced PD cell model and that ROCK1 knockdown and the specific ROCK1 activation inhibitor Y-27632 blocked Drp1-mediated aberrant mitochondrial fission and apoptosis of dopaminergic nerve cells by suppressing Drp1 dephosphorylation/activation. Our in vivo study confirmed that Y-27632 significantly improved symptoms in a PD mouse model by inhibiting Drp1-mediated aberrant mitochondrial fission and apoptosis. Collectively, our findings suggest an important molecular mechanism of PD pathogenesis involving ROCK1-regulated dopaminergic nerve cell apoptosis via the activation of Drp1-induced aberrant mitochondrial fission. Researchers in China have revealed how a protein molecule plays an early part in the molecular steps that can lead to Parkinson’s disease, which is caused by the death of nerve cells that make the neurotransmitter dopamine. Disruption of mitochondria, the energy-generating bodies inside cells, was already known to lead to the death of dopamine-producing cells. Rong Zhang, Guobing Li and colleagues at The Second Affiliated Hospital of Army Medical University in Chongqing, China traced the chain of cause and effect back to a protein called ROCK-1. Using a mouse model of Parkinson’s disease, they found that ROCK-1 activates another protein previously shown to trigger the disruption of mitochondria. ROCK-1’s early role in the sequence might make it a suitable target for treatment using drugs that inhibit its activity.
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Affiliation(s)
- Qian Zhang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Changpeng Hu
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Jingbin Huang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Wuyi Liu
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Wenjing Lai
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Faning Leng
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Qin Tang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Yali Liu
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Qing Wang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Min Zhou
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Fangfang Sheng
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China
| | - Guobing Li
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China.
| | - Rong Zhang
- Department of Pharmacy, The Second Affiliated Hospital of Army Medical University, 400037, Chongqing, China.
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7
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Liu WY, Tang Q, Zhang Q, Hu CP, Huang JB, Sheng FF, Liu YL, Zhou M, Lai WJ, Li GB, Zhang R. Lycorine Induces Mitochondria-Dependent Apoptosis in Hepatoblastoma HepG2 Cells Through ROCK1 Activation. Front Pharmacol 2019; 10:651. [PMID: 31263414 PMCID: PMC6589644 DOI: 10.3389/fphar.2019.00651] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 05/20/2019] [Indexed: 01/13/2023] Open
Abstract
Lycorine, a naturally occurring compound extracted from the Amaryllidaceae plant family, has been reported to exhibit antitumor activity in various cancer cell types. In the present study, we investigated the molecular mechanisms underlying lycorine-induced apoptosis in hepatoblastoma HepG2 cells. We found that lycorine induced mitochondria-dependent apoptosis in HepG2 cells accompanied by mitochondrial permeability transition pore (mPTP) opening, mitochondrial membrane potential (MMP) loss, adenosine triphosphate (ATP) depletion, Ca2+ and cytochrome c (Cyto C) release, as well as caspase activation. Furthermore, we found Rho associated coiled-coil containing protein kinase 1 (ROCK1) cleavage/activation played a critical role in lycorine-induced mitochondrial apoptosis. In addition, the ROCK inhibitor Y-27632 was employed, and we found that co-treatment with Y-27632 attenuated lycorine-induced mitochondrial injury and cell apoptosis. Meanwhile, an in vivo study revealed that lycorine inhibited tumor growth and induced apoptosis in a HepG2 xenograft mouse model in association with ROCK1 activation. Taken together, all these findings suggested that lycorine induced mitochondria-dependent apoptosis through ROCK1 activation in HepG2 cells, and this may be a theoretical basis for lycorine's anticancer effects.
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Affiliation(s)
- Wu-Yi Liu
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Qin Tang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Qian Zhang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Chang-Peng Hu
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Jing-Bin Huang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Fang-Fang Sheng
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Ya-Li Liu
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Min Zhou
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Wen-Jing Lai
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Guo-Bing Li
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Rong Zhang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
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8
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Aikman B, de Almeida A, Meier-Menches SM, Casini A. Aquaporins in cancer development: opportunities for bioinorganic chemistry to contribute novel chemical probes and therapeutic agents. Metallomics 2019; 10:696-712. [PMID: 29766198 DOI: 10.1039/c8mt00072g] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Aquaporins (AQPs) are membrane proteins allowing permeation of water, glycerol & hydrogen peroxide across biomembranes, and playing an important role in water homeostasis in different organs, exocrine gland secretion, urine concentration, skin moisturization, fat metabolism and neural signal transduction. Notably, a large number of studies showed that AQPs are closely associated with cancer biological functions and expressed in more than 20 human cancer cell types. Furthermore, AQP expression is positively correlated with tumour types, grades, proliferation, migration, angiogenesis, as well as tumour-associated oedema, rendering these membrane channels attractive as both diagnostic and therapeutic targets in cancer. Recent developments in the field of AQPs modulation have identified coordination metal-based complexes as potent and selective inhibitors of aquaglyceroporins, opening new avenues in the application of inorganic compounds in medicine and chemical biology. The present review is aimed at providing an overview on AQP structure and function, mainly in relation to cancer. In this context, the exploration of coordination metal compounds as possible inhibitors of aquaporins may open the way to novel chemical approaches to study AQP roles in tumour growth and potentially to new drug families. Thus, we describe recent results in the field and reflect upon the potential of inorganic chemistry in providing compounds to modulate the activity of "elusive" membrane targets as the aquaporins.
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Affiliation(s)
- Brech Aikman
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK.
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Leng F, Liu Y, Li G, Lai W, Zhang Q, Liu W, Hu C, Li P, Sheng F, Huang J, Zhang R. Cu2−xSe nanoparticles (Cu2−xSe NPs) mediated neurotoxicityviaoxidative stress damage in PC-12 cells and BALB/c mice. RSC Adv 2019; 9:36558-36569. [PMID: 35539053 PMCID: PMC9075139 DOI: 10.1039/c9ra06245a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Accepted: 10/26/2019] [Indexed: 12/02/2022] Open
Abstract
Cu2−xSe nanoparticles (Cu2−xSe NPs) are widely used for optical diagnostic imaging and photothermal therapy due to their strong near-infrared (NIR) optical absorption. With the continuous expansion of applications using Cu2−xSe NPs, their biosafety has received increasing attention in recent years. Cu2−xSe NPs can enter the brain by crossing the blood–brain barrier, but the neurotoxicity of NPs remains unclear. The present investigation provides direct evidence that the toxicity of Cu2−xSe NPs can be specifically exploited to kill rat pheochromocytoma PC-12 cells (a cell line used as an in vitro model for brain neuron research) in dose- and time-dependent manners. These cytotoxicity events were accompanied by mitochondrial damage, adenosine triphosphate (ATP) depletion, production of oxidizing species (including reactive oxygen species (ROS), malondialdehyde (MDA) and hydrogen peroxide (H2O2)), as well as reductions in antioxidant defense systems (glutathione (GSH) and superoxide dismutase (SOD)). Moreover, our in vivo study also confirmed that Cu2−xSe NPs markedly induced neurotoxicity and oxidative stress damage in the striatum and hippocampal tissues of BALB/c mice. These findings suggest that Cu2−xSe NPs induce neurotoxicity in PC-12 cells and BALB/c mice via oxidative stress damage, which provides useful information for understanding the neurotoxicity of Cu2−xSe NPs. Cu2−xSe nanoparticles (Cu2−xSe NPs) are widely used for optical diagnostic imaging and photothermal therapy due to their strong near-infrared (NIR) optical absorption.![]()
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Affiliation(s)
- Faning Leng
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Yali Liu
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Guobing Li
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Wenjing Lai
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Qian Zhang
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Wuyi Liu
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Changpeng Hu
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Pantong Li
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Fangfang Sheng
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Jingbin Huang
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
| | - Rong Zhang
- Department of Pharmacology
- The Second Affiliated Hospital of Army Medical University
- Chongqing
- China
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10
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Zhang R, Li G, Zhang Q, Tang Q, Huang J, Hu C, Liu Y, Wang Q, Liu W, Gao N, Zhou S. Hirsutine induces mPTP-dependent apoptosis through ROCK1/PTEN/PI3K/GSK3β pathway in human lung cancer cells. Cell Death Dis 2018; 9:598. [PMID: 29789524 PMCID: PMC5964100 DOI: 10.1038/s41419-018-0641-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 04/13/2018] [Accepted: 05/02/2018] [Indexed: 02/02/2023]
Abstract
Hirsutine extracted from Uncaria rhynchophylla has been shown to exhibit anti-cancer activity. However, the molecular mechanism by which hirsutine exhibits anti-lung cancer activity remains unclear. In the present study, we showed that hirsutine induces apoptosis in human lung cancer cells via loss of mitochondrial membrane potential (∆ψm), adenosine triphosphate (ATP) depletion, ROS production, as well as cytochrome c release. Dephosphorylation of GSK3β is involved in hirsutine-mediated mitochondrial permeability transition pore (mPTP) opening through ANT1/CypD interaction. Mechanistic study revealed that interruption of ROCK1/PTEN/PI3K/Akt signaling pathway plays a critical role in hirsutine-mediated GSK3β dephosphorylation and mitochondrial apoptosis. Our in vivo study also showed that hirsutine effectively inhibits tumor growth in a A549 xenograft mouse model through ROCK1/PTEN/PI3K/Akt signaling-mediated GSK3β dephosphorylation and apoptosis. Collectively, these findings suggest a hierarchical model in which induction of apoptosis by hirsutine stems primarily from activation of ROCK1 and PTEN, inactivation of PI3K/Akt, leading in turn to GSK3β dephosphorylation and mPTP opening, and culminating in caspase-3 activation and apoptosis. These findings could provide a novel mechanistic basis for the application of hirsutine in the treatment of human lung cancer.
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Affiliation(s)
- Rong Zhang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China
| | - Guobing Li
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China
| | - Qian Zhang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China
| | - Qin Tang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China
| | - Jingbin Huang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China
| | - Changpeng Hu
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China
| | - Yali Liu
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China
| | - Qing Wang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China
| | - Wuyi Liu
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China
| | - Ning Gao
- College of Pharmacy, Army Medical University, 400038, Chongqing, China.
| | - Shiwen Zhou
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, 400037, Chongqing, China.
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11
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Abstract
Cancer metabolism is emerging as a chemotherapeutic target. Enhanced glycolysis and suppression of mitochondrial metabolism characterize the Warburg phenotype in cancer cells. The flux of respiratory substrates, ADP, and Pi into mitochondria and the release of mitochondrial ATP to the cytosol occur through voltage-dependent anion channels (VDACs) located in the mitochondrial outer membrane. Catabolism of respiratory substrates in the Krebs cycle generates NADH and FADH2 that enter the electron transport chain (ETC) to generate a proton motive force that maintains mitochondrial membrane potential (ΔΨ) and is utilized to generate ATP. The ETC is also the major cellular source of mitochondrial reactive oxygen species (ROS). αβ-Tubulin heterodimers decrease VDAC conductance in lipid bilayers. High constitutive levels of cytosolic free tubulin in intact cancer cells close VDAC decreasing mitochondrial ΔΨ and mitochondrial metabolism. The VDAC-tubulin interaction regulates VDAC opening and globally controls mitochondrial metabolism, ROS formation, and the intracellular flow of energy. Erastin, a VDAC-binding molecule lethal to some cancer cell types, and erastin-like compounds identified in a high-throughput screening antagonize the inhibitory effect of tubulin on VDAC. Reversal of tubulin inhibition of VDAC increases VDAC conductance and the flux of metabolites into and out of mitochondria. VDAC opening promotes a higher mitochondrial ΔΨ and a global increase in mitochondrial metabolism leading to high cytosolic ATP/ADP ratios that inhibit glycolysis. VDAC opening also increases ROS production causing oxidative stress that, in turn, leads to mitochondrial dysfunction, bioenergetic failure, and cell death. In summary, antagonism of the VDAC-tubulin interaction promotes cell death by a "double-hit model" characterized by reversion of the proproliferative Warburg phenotype (anti-Warburg) and promotion of oxidative stress.
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Affiliation(s)
- Diana Fang
- Medical University of South Carolina, Charleston, SC, United States
| | - Eduardo N Maldonado
- Medical University of South Carolina, Charleston, SC, United States; Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, United States.
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12
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Shoshan-Barmatz V, Bishitz Y, Paul A, Krelin Y, Nakdimon I, Peled N, Lavon A, Rudoy-Zilberman E, Refaely Y. A molecular signature of lung cancer: potential biomarkers for adenocarcinoma and squamous cell carcinoma. Oncotarget 2017; 8:105492-105509. [PMID: 29285267 PMCID: PMC5739654 DOI: 10.18632/oncotarget.22298] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 08/17/2017] [Indexed: 01/09/2023] Open
Abstract
Adenocarcinoma (AC) and squamous cell carcinoma (SCC), sub-types of non-small cell lung cancer (NSCLC), both present unique features at the genome, epigenome, transcriptome and proteome levels, as well as shared clinical and histopathological characteristics, but differ in terms of treatment. To ensure proper treatment, one must be able to distinguish between these sub-types. Here, we identify novel biomarker proteins in NSCLC, allowing for distinguishing between the AC and SCC sub-types. Proteomics analysis distinguished between healthy and tumor tissues, with the expression level of 1,494 proteins being altered, 378 of which showed a ≥|100|-fold change. Enrichment of proteins related to protein synthesis and degradation, and of proteins associated with mitochondria, metabolism, and apoptosis, was found. Network analysis defined groups of proteins, such as those associated with cell metabolic processes or with fatty acid/lipid metabolism and transport. Several biomarkers that enable for distinguishing between AC and SCC were identified here for the first time, and together with previous reports confirmed here, led us to propose a list of proteins differentially expressed in SCC and AC. Some of these biomarkers are clear signatures for AC or SCC and four of them are secreted proteins. The presence of the mitochondrial protein SMAC/Diablo in the nucleus was found to be a signature for SCC. Precise diagnosis of AC and SCC is essential for selecting appropriate treatment and thus, increasing patient life expectancy. Finally, the search for drugs that target some of these biomarkers may lead to new treatments for lung cancer.
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Affiliation(s)
- Varda Shoshan-Barmatz
- Department of Life Sciences and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Yael Bishitz
- Department of Life Sciences and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Avijit Paul
- Department of Life Sciences and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Yakov Krelin
- Department of Life Sciences and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Itay Nakdimon
- Department of Life Sciences and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Nir Peled
- Thoracic Cancer Unit and The Center for Precision Cancer Care, Davidoff Cancer Center, Petach Tiqwa, Israel
| | - Avia Lavon
- Department of Life Sciences and The National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Elina Rudoy-Zilberman
- Department of Cardio-Thoracic Surgery, Soroka University Medical Center and The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Yael Refaely
- Department of Cardio-Thoracic Surgery, Soroka University Medical Center and The Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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13
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Shoshan-Barmatz V, Maldonado EN, Krelin Y. VDAC1 at the crossroads of cell metabolism, apoptosis and cell stress. Cell Stress 2017; 1:11-36. [PMID: 30542671 PMCID: PMC6287957 DOI: 10.15698/cst2017.10.104] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
This review presents current knowledge related to VDAC1 as a multi-functional mitochondrial protein acting on both sides of the coin, regulating cell life and death, and highlighting these functions in relation to disease. It is now recognized that VDAC1 plays a crucial role in regulating the metabolic and energetic functions of mitochondria. The location of VDAC1 at the outer mitochondrial membrane (OMM) allows the control of metabolic cross-talk between mitochondria and the rest of the cell and also enables interaction of VDAC1 with proteins involved in metabolic and survival pathways. Along with regulating cellular energy production and metabolism, VDAC1 is also involved in the process of mitochondria-mediated apoptosis by mediating the release of apoptotic proteins and interacting with anti-apoptotic proteins. VDAC1 functions in the release of apoptotic proteins located in the mitochondrial intermembrane space via oligomerization to form a large channel that allows passage of cytochrome c and AIF and their release to the cytosol, subsequently resulting in apoptotic cell death. VDAC1 also regulates apoptosis via interactions with apoptosis regulatory proteins, such as hexokinase, Bcl2 and Bcl-xL, some of which are also highly expressed in many cancers. This review also provides insight into VDAC1 function in Ca2+ homeostasis, oxidative stress, and presents VDAC1 as a hub protein interacting with over 100 proteins. Such interactions enable VDAC1 to mediate and regulate the integration of mitochondrial functions with cellular activities. VDAC1 can thus be considered as standing at the crossroads between mitochondrial metabolite transport and apoptosis and hence represents an emerging cancer drug target.
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Affiliation(s)
- Varda Shoshan-Barmatz
- Department of Life Sciences and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Eduardo N Maldonado
- Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC. USA
| | - Yakov Krelin
- Department of Life Sciences and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
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14
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Mammucari C, Gherardi G, Rizzuto R. Structure, Activity Regulation, and Role of the Mitochondrial Calcium Uniporter in Health and Disease. Front Oncol 2017; 7:139. [PMID: 28740830 PMCID: PMC5502327 DOI: 10.3389/fonc.2017.00139] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 06/19/2017] [Indexed: 01/09/2023] Open
Abstract
Mitochondrial Ca2+ uptake plays a pivotal role both in cell energy balance and in cell fate determination. Studies on the role of mitochondrial Ca2+ signaling in pathophysiology have been favored by the identification of the genes encoding the mitochondrial calcium uniporter (MCU) and its regulatory subunits. Thus, research carried on in the last years on one hand has determined the structure of the MCU complex and its regulation, on the other has uncovered the consequences of dysregulated mitochondrial Ca2+ signaling in cell and tissue homeostasis. Whether mitochondrial Ca2+ uptake can be exploited as a weapon to counteract cancer progression is debated. In this review, we summarize recent research on the molecular structure of the MCU, the regulatory mechanisms that control its activity and its relevance in pathophysiology, focusing in particular on its role in cancer progression.
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Affiliation(s)
| | - Gaia Gherardi
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Rosario Rizzuto
- Department of Biomedical Sciences, University of Padova, Padova, Italy
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15
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Tao T, Chen M, Jiang R, Guan H, Huang Y, Su H, Hu Q, Han X, Xiao J. Involvement of EZH2 in aerobic glycolysis of prostate cancer through miR-181b/HK2 axis. Oncol Rep 2017; 37:1430-1436. [PMID: 28184935 PMCID: PMC5364858 DOI: 10.3892/or.2017.5430] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 02/03/2017] [Indexed: 12/29/2022] Open
Abstract
Recent studies suggest that several types of tumors preferentially metabolize glucose through aerobic glycolysis, a phenomenon known as the Warburg effect. However, it remains largely unexplored whether metabolic reprogramming is involved in prostate cancer (PCa) progression. In this study, we found that histone methyltransferase enhancer of zeste homolog 2 (EZH2) dysregulated in PCa development regulated cellular growth and aerobic glycolysis through miR-181b/hexokinase 2 (HK2) axis. Aberrant expression profiles of coding RNA and microRNA were examined by two large, independent clinical prostate cancer data sets. The results indicated that EZH2 expression was elevated followed by PCa development. A set of glycometabolism-related genes were positively correlated with EZH2 expression such as HK2. The depletion of EZH2 in cell experiments inhibited PCa cell growth and aerobic glycolysis accompanying the upregulation of miR-181b. Western blot and luciferase reporter assays showed that miR-181b inversely modulated HK2 by directly targeting the binding site within 3′-untranslated regions. Moreover, decreased miR-181b expression largely abrogated the effect of sh-EZH2 on HK2 expression and HK2-induced glucose metabolism process. Immunohistochemistry (IHC) and in situ hybridisation (ISH) analysis further revealed a significant correlation in EZH2, miR-181b and HK2 expression in nude mouse tumor xenograft. Taken together, these findings provide the first evidence that EZH2/miR-181b/HK2 pathway plays a positive role in PCa development. Targeting this aberrantly activated pathway may provide a new therapeutic strategy against PCa.
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Affiliation(s)
- Tao Tao
- Department of Urology, Anhui Provincial Hospital, Anhui Medical University, Hefei, Anhui 230001, P.R. China
| | - Ming Chen
- Department of Urology, Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Ranran Jiang
- Jiangsu Key Laboratory of Biological Cancer Therapy, Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China
| | - Han Guan
- Department of Urology, Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Yeqing Huang
- Department of Urology, Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Huan Su
- Department of Urology, Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Qiang Hu
- Department of Urology, Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Xu Han
- Department of Urology, Zhongda Hospital, Medical School, Southeast University, Nanjing, Jiangsu 210009, P.R. China
| | - Jun Xiao
- Department of Urology, Anhui Provincial Hospital, Anhui Medical University, Hefei, Anhui 230001, P.R. China
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16
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Maldonado EN. VDAC-Tubulin, an Anti-Warburg Pro-Oxidant Switch. Front Oncol 2017; 7:4. [PMID: 28168164 PMCID: PMC5256068 DOI: 10.3389/fonc.2017.00004] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 01/05/2017] [Indexed: 12/11/2022] Open
Abstract
Aerobic enhanced glycolysis characterizes the Warburg phenotype. In cancer cells, suppression of mitochondrial metabolism contributes to maintain a low ATP/ADP ratio that favors glycolysis. We propose that the voltage-dependent anion channel (VDAC) located in the mitochondrial outer membrane is a metabolic link between glycolysis and oxidative phosphorylation in the Warburg phenotype. Most metabolites including respiratory substrates, ADP, and Pi enter mitochondria only through VDAC. Oxidation of respiratory substrates in the Krebs cycle generates NADH that enters the electron transport chain (ETC) to generate a proton motive force utilized to generate ATP and to maintain mitochondrial membrane potential (ΔΨ). The ETC is also the major source of mitochondrial reactive oxygen species (ROS) formation. Dimeric α-β tubulin decreases conductance of VDAC inserted in lipid bilayers, and high free tubulin in cancer cells by closing VDAC, limits the ingress of respiratory substrates and ATP decreasing mitochondrial ΔΨ. VDAC opening regulated by free tubulin operates as a “master key” that “seal–unseal” mitochondria to modulate mitochondrial metabolism, ROS formation, and the intracellular flow of energy. Erastin, a small molecule that binds to VDAC and kills cancer cells, and erastin-like compounds antagonize the inhibitory effect of tubulin on VDAC. Blockage of the VDAC–tubulin switch increases mitochondrial metabolism leading to decreased glycolysis and oxidative stress that promotes mitochondrial dysfunction, bioenergetic failure, and cell death. In summary, VDAC opening-dependent cell death follows a “metabolic double-hit model” characterized by oxidative stress and reversion of the pro-proliferative Warburg phenotype.
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Affiliation(s)
- Eduardo N Maldonado
- Department of Pharmaceutical and Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA; Hollings Cancer Center, Medical University of South Carolina, Charleston, SC, USA; Center for Cell Death, Injury and Regeneration, Medical University of South Carolina, Charleston, SC, USA
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17
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Maldonado EN, DeHart DN, Patnaik J, Klatt SC, Gooz MB, Lemasters JJ. ATP/ADP Turnover and Import of Glycolytic ATP into Mitochondria in Cancer Cells Is Independent of the Adenine Nucleotide Translocator. J Biol Chem 2016; 291:19642-50. [PMID: 27458020 DOI: 10.1074/jbc.m116.734814] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Indexed: 11/06/2022] Open
Abstract
Non-proliferating cells oxidize respiratory substrates in mitochondria to generate a protonmotive force (Δp) that drives ATP synthesis. The mitochondrial membrane potential (ΔΨ), a component of Δp, drives release of mitochondrial ATP(4-) in exchange for cytosolic ADP(3-) via the electrogenic adenine nucleotide translocator (ANT) located in the mitochondrial inner membrane, which leads to a high cytosolic ATP/ADP ratio up to >100-fold greater than matrix ATP/ADP. In rat hepatocytes, ANT inhibitors, bongkrekic acid (BA), and carboxyatractyloside (CAT), and the F1FO-ATP synthase inhibitor, oligomycin (OLIG), inhibited ureagenesis-induced respiration. However, in several cancer cell lines, OLIG but not BA and CAT inhibited respiration. In hepatocytes, respiratory inhibition did not collapse ΔΨ until OLIG, BA, or CAT was added. Similarly, in cancer cells OLIG and 2-deoxyglucose, a glycolytic inhibitor, depolarized mitochondria after respiratory inhibition, which showed that mitochondrial hydrolysis of glycolytic ATP maintained ΔΨ in the absence of respiration in all cell types studied. However in cancer cells, BA, CAT, and knockdown of the major ANT isoforms, ANT2 and ANT3, did not collapse ΔΨ after respiratory inhibition. These findings indicated that ANT was not mediating mitochondrial ATP/ADP exchange in cancer cells [corrected]. We propose that suppression of ANT contributes to low cytosolic ATP/ADP, activation of glycolysis, and a Warburg metabolic phenotype in proliferating cells.
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Affiliation(s)
- Eduardo N Maldonado
- From the Center for Cell Death, Injury, and Regeneration, Departments of Drug Discovery and Biomedical Sciences and the Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina 29425 and
| | - David N DeHart
- Departments of Drug Discovery and Biomedical Sciences and
| | - Jyoti Patnaik
- Departments of Drug Discovery and Biomedical Sciences and
| | - Sandra C Klatt
- Departments of Drug Discovery and Biomedical Sciences and
| | | | - John J Lemasters
- From the Center for Cell Death, Injury, and Regeneration, Departments of Drug Discovery and Biomedical Sciences and the Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina 29425 and Biochemistry and Molecular Biology, and the Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Russian Federation 142290
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18
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Niyazov DM, Kahler SG, Frye RE. Primary Mitochondrial Disease and Secondary Mitochondrial Dysfunction: Importance of Distinction for Diagnosis and Treatment. Mol Syndromol 2016; 7:122-37. [PMID: 27587988 DOI: 10.1159/000446586] [Citation(s) in RCA: 145] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2016] [Indexed: 12/28/2022] Open
Abstract
Mitochondrial disease refers to a heterogeneous group of disorders resulting in defective cellular energy production due to abnormal oxidative phosphorylation (oxphos). Primary mitochondrial disease (PMD) is diagnosed clinically and ideally, but not always, confirmed by a known or indisputably pathogenic mitochondrial DNA (mtDNA) or nuclear DNA (nDNA) mutation. The PMD genes either encode oxphos proteins directly or they affect oxphos function by impacting production of the complex machinery needed to run the oxphos process. However, many disorders have the 'mitochondrial' phenotype without an identifiable mtDNA or nDNA mutation or they have a variant of unknown clinical significance. Secondary mitochondrial dysfunction (SMD) can be caused by genes encoding neither function nor production of the oxphos proteins and accompanies many hereditary non-mitochondrial diseases. SMD may also be due to nongenetic causes such as environmental factors. In our practice, we see many patients with clinical signs of mitochondrial dysfunction based on phenotype, biomarkers, imaging, muscle biopsy, or negative/equivocal mtDNA or nDNA test results. In these cases, it is often tempting to assign a patient's phenotype to 'mitochondrial disease', but SMD is often challenging to distinguish from PMD. Fortunately, rapid advances in molecular testing, made possible by next generation sequencing, have been effective at least in some cases in establishing accurate diagnoses to distinguish between PMD and SMD. This is important, since their treatments and prognoses can be quite different. However, even in the absence of the ability to distinguish between PMD and SMD, treating SMD with standard treatments for PMD can be effective. We review the latest findings regarding mitochondrial disease/dysfunction and give representative examples in which differentiation between PMD and SMD has been crucial for diagnosis and treatment.
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Affiliation(s)
- Dmitriy M Niyazov
- Department of Pediatrics, Ochsner Clinic Foundation, New Orleans, La, USA
| | - Stephan G Kahler
- Department of Pediatrics, Arkansas Children's Hospital and Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, Ark., USA
| | - Richard E Frye
- Department of Pediatrics, Arkansas Children's Hospital and Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, Ark., USA
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19
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Sokolov SS, Balakireva AV, Markova OV, Severin FF. Negative Feedback of Glycolysis and Oxidative Phosphorylation: Mechanisms of and Reasons for It. BIOCHEMISTRY (MOSCOW) 2016; 80:559-64. [PMID: 26071773 DOI: 10.1134/s0006297915050065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
There are two main pathways of ATP biosynthesis: glycolysis and oxidative phosphorylation. As a rule, the two pathways are not fully active in a single cell. In this review, we discuss mechanisms of glycolytic inhibition of respiration (Warburg and Crabtree effects). What are the reasons for the existence of this negative feedback? It is known that maximal activation of both processes can cause generation of reactive oxygen species. Oxidative phosphorylation is more efficient from the energy point of view, while glycolysis is safer and favors biomass synthesis. This might be the reason why quiescent cells are mainly using oxidative phosphorylation, while the quickly proliferating ones - glycolysis.
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Affiliation(s)
- S S Sokolov
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow, 119991, Russia.
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20
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Biomolecular bases of the senescence process and cancer. A new approach to oncological treatment linked to ageing. Ageing Res Rev 2015; 23:125-38. [PMID: 25847820 DOI: 10.1016/j.arr.2015.03.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 03/30/2015] [Indexed: 01/07/2023]
Abstract
Human ageing is associated with a gradual decline in the physiological functions of the body at multiple levels and it is a key risk factor for many diseases, including cancer. Ageing process is intimately related to widespread cellular senescence, characterised by an irreversible loss of proliferative capacity and altered functioning associated with telomere attrition, accumulation of DNA damage and compromised mitochondrial and metabolic function. Tumour and senescent cells may be generated in response to the same stimuli, where either cellular senescence or transformation would constitute two opposite outcomes of the same degenerative process. This paper aims to review the state of knowledge on the biomolecular relationship between cellular senescence, ageing and cancer. Importantly, many of the cell signalling pathways that are found to be altered during both cellular senescence and tumourigenesis are regulated through shared epigenetic mechanisms and, therefore, they are potentially reversible. MicroRNAs are emerging as pivotal players linking ageing and cancer. These small RNA molecules have generated great interest from the point of view of future clinical therapy for cancer because successful experimental results have been obtained in animal models. Micro-RNA therapies for cancer are already being tested in clinical phase trials. These findings have potential importance in cancer treatment in aged people although further research-based knowledge is needed to convert them into an effective molecular therapies for cancer linked to ageing.
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21
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Pajuelo-Reguera D, Alán L, Olejár T, Ježek P. Dichloroacetate stimulates changes in the mitochondrial network morphology via partial mitophagy in human SH-SY5Y neuroblastoma cells. Int J Oncol 2015; 46:2409-18. [PMID: 25846762 DOI: 10.3892/ijo.2015.2953] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 03/11/2015] [Indexed: 11/06/2022] Open
Abstract
Dichloroacetate (DCA) is beneficial in cancer therapy because it induces apoptosis and decreases cancer growth in vitro and in vivo without affecting non-cancer cells. DCA stimulates the activity of the enzyme pyruvate dehydrogenase by inhibiting pyruvate dehydrogenase kinase. Consequently, DCA promotes oxidative phosphorylation after glycolysis. Therefore, DCA produces changes in energy metabolism that could affect the mitochondrial network and mitophagy. This investigation determined the effects of DCA treatment on mitophagy in human neuroblastoma SH-SY5Y cells. SH-SY5Y cells were cultured and distributed into 3 groups: control, NH4Cl and chloroquine. Each group was treated with DCA at 0, 5, 30 and 60 mM for 16 h. Samples were analyzed for cell viability, mtDNA copy number, mitochondrial network morphology and expression of key proteins involved in mitochondrial dynamics, such as LC3b, FIS1, OPA1, PARKIN and PINK1. In all groups, DCA caused a decrease in cell viability, an induction of autophagy in a dose-dependent manner and a decrease in Tim23, FIS1 and PARKIN protein expression, leading to profound morphological changes in the mitochondrial network resulting in shorter and more fragmented filaments. However, TFAM protein levels remained unchanged. Similarly, the mitochondrial copy number was not significantly different among the treatment groups. In conclusion, DCA induces mitophagy and remodeling of the mitochondrial network. In this remodeling, DCA induces a decrease in the expression of key proteins involved in protein degradation and mitochondrial dynamics but does not significantly affect the mtDNA density. Blocking late phase autophagy increases the effects of DCA, suggesting that autophagy protects the cell, at least partially, against DCA.
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Affiliation(s)
- David Pajuelo-Reguera
- Department of Membrane Transport Biophysics, No. 75, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Lukáš Alán
- Department of Membrane Transport Biophysics, No. 75, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Tomáš Olejár
- Department of Membrane Transport Biophysics, No. 75, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - Petr Ježek
- Department of Membrane Transport Biophysics, No. 75, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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22
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Chan B, Manley J, Lee J, Singh SR. The emerging roles of microRNAs in cancer metabolism. Cancer Lett 2015; 356:301–8. [DOI: 10.1016/j.canlet.2014.10.011] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 10/09/2014] [Indexed: 12/13/2022]
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23
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Maldonado EN, Lemasters JJ. ATP/ADP ratio, the missed connection between mitochondria and the Warburg effect. Mitochondrion 2014; 19 Pt A:78-84. [PMID: 25229666 DOI: 10.1016/j.mito.2014.09.002] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 09/08/2014] [Accepted: 09/08/2014] [Indexed: 02/06/2023]
Abstract
Non-proliferating cells generate the bulk of cellular ATP by fully oxidizing respiratory substrates in mitochondria. Respiratory substrates cross the mitochondrial outer membrane through only one channel, the voltage dependent anion channel (VDAC). Once in the matrix, respiratory substrates are oxidized in the tricarboxylic acid cycle to generate mostly NADH that is further oxidized in the respiratory chain to generate a proton motive force comprised mainly of membrane potential (ΔΨ) to synthesize ATP. Mitochondrial ΔΨ then drives the release of ATP(4-) from the matrix in exchange for ADP(3-) in the cytosol via the adenine nucleotide translocator (ANT) located in the mitochondrial inner membrane. Thus, mitochondrial function in non-proliferating cells drives a high cytosolic ATP/ADP ratio, essential to inhibit glycolysis. By contrast, the bioenergetics of the Warburg phenotype of proliferating cells is characterized by enhanced aerobic glycolysis and the suppression of mitochondrial metabolism. Suppressed mitochondrial function leads to lower production of mitochondrial ATP and hence lower cytosolic ATP/ADP ratios that favor enhanced glycolysis. Thus, the cytosolic ATP/ADP ratio is a key feature that determines if cell metabolism is predominantly oxidative or glycolytic. Here, we describe two novel mechanisms to explain the suppression of mitochondrial metabolism in cancer cells: the relative closure of VDAC by free tubulin and the inactivation of ANT. Both mechanisms contribute to low ATP/ADP ratios that activate glycolysis.
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Affiliation(s)
- Eduardo N Maldonado
- Center for Cell Death, Injury & Regeneration, Medical University of South Carolina, Charleston, SC 29425, United States; Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC 29425, United States; Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, United States
| | - John J Lemasters
- Center for Cell Death, Injury & Regeneration, Medical University of South Carolina, Charleston, SC 29425, United States; Department of Drug Discovery & Biomedical Sciences, Medical University of South Carolina, Charleston, SC 29425, United States; Department of Biochemistry & Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, United States; Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, United States; Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Russia.
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Hamabe A, Yamamoto H, Konno M, Uemura M, Nishimura J, Hata T, Takemasa I, Mizushima T, Nishida N, Kawamoto K, Koseki J, Doki Y, Mori M, Ishii H. Combined evaluation of hexokinase 2 and phosphorylated pyruvate dehydrogenase-E1α in invasive front lesions of colorectal tumors predicts cancer metabolism and patient prognosis. Cancer Sci 2014; 105:1100-8. [PMID: 25060325 PMCID: PMC4462394 DOI: 10.1111/cas.12487] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 06/22/2014] [Accepted: 07/04/2014] [Indexed: 12/31/2022] Open
Abstract
Although numerous studies have shown the significance of cancer-specific aerobic glycolysis, how glycolysis contributes to tumor invasion, a critical phenomenon in metastasis, remains unclear. With regard to colorectal cancer (CRC), we studied two critical gate enzymes, hexokinase 2 (HK2), which is involved in glycolysis, and phosphorylated pyruvate dehydrogenase-E1α (p-PDH), which is involved in oxidative phosphorylation (OxPhos). Immunohistochemical analyses using anti-HK2 and p-PDH antibodies were performed on surgically resected CRC samples (n = 104), and the expression in invasive front lesions of tumors was assessed. Positive HK2 expression correlated with extensive tumor diameter (P = 0.0460), advanced tumor depth (P = 0.0395), and presence of lymph node metastasis (P = 0.0409). Expression of p-PDH tended to be higher in right-sided CRCs than in left-sided CRCs (P = 0.0883). In survival analysis, the combined evaluation of positive HK2 and negative p-PDH was associated with reduced recurrence-free survival (RFS) (P = 0.0169 in all stages and P = 0.0238 in Stage II and III patients, respectively). This evaluation could predict RFS more precisely than the independent evaluation. The present study indicated that high HK2 expression combined with low p-PDH expression in the invasive front lesions of CRC tumors is predictive of tumor aggressiveness and survival of CRC cases.
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Affiliation(s)
- Atsushi Hamabe
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Hirofumi Yamamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Masamitsu Konno
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Mamoru Uemura
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Junichi Nishimura
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Taishi Hata
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Ichiro Takemasa
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Tsunekazu Mizushima
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Naohiro Nishida
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Jun Koseki
- Department ofCancer Profiling Discovery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Yuichiro Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Masaki Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
| | - Hideshi Ishii
- Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka UniversityOsaka, Japan
- Department ofCancer Profiling Discovery, Graduate School of Medicine, Osaka UniversityOsaka, Japan
- Correspondence Hideshi Ishii, Department of Frontier Science for Cancer and Chemotherapy, Graduate School of Medicine, Osaka University, Suita, Yamadaoka 2-2, Osaka 565-0871, Japan., Tel: +81-(0)6-6879-2641, 2640; Fax: +81-(0)6-6879-2639;, E-mail:
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