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Chen S, Xu Y, Zhuo W, Zhang L. The emerging role of lactate in tumor microenvironment and its clinical relevance. Cancer Lett 2024; 590:216837. [PMID: 38548215 DOI: 10.1016/j.canlet.2024.216837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/16/2024] [Accepted: 03/25/2024] [Indexed: 04/12/2024]
Abstract
In recent years, the significant impact of lactate in the tumor microenvironment has been greatly documented. Acting not only as an energy substance in tumor metabolism, lactate is also an imperative signaling molecule. It plays key roles in metabolic remodeling, protein lactylation, immunosuppression, drug resistance, epigenetics and tumor metastasis, which has a tight relation with cancer patients' poor prognosis. This review illustrates the roles lactate plays in different aspects of tumor progression and drug resistance. From the comprehensive effects that lactate has on tumor metabolism and tumor immunity, the therapeutic targets related to it are expected to bring new hope for cancer therapy.
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Affiliation(s)
- Sihan Chen
- Department of Cell Biology and Department of Colorectal Surgery and Oncology, Center for Medical Research and Innovation in Digestive System Tumors, Ministry of Education, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Cancer Center, Zhejiang University, Hangzhou, China; Institute of Gastroenterology, Zhejiang University, Hangzhou, China
| | - Yining Xu
- Department of Cell Biology and Department of Colorectal Surgery and Oncology, Center for Medical Research and Innovation in Digestive System Tumors, Ministry of Education, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Cancer Center, Zhejiang University, Hangzhou, China; Institute of Gastroenterology, Zhejiang University, Hangzhou, China
| | - Wei Zhuo
- Department of Cell Biology and Department of Colorectal Surgery and Oncology, Center for Medical Research and Innovation in Digestive System Tumors, Ministry of Education, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Cancer Center, Zhejiang University, Hangzhou, China; Institute of Gastroenterology, Zhejiang University, Hangzhou, China.
| | - Lu Zhang
- Department of Cell Biology and Department of Colorectal Surgery and Oncology, Center for Medical Research and Innovation in Digestive System Tumors, Ministry of Education, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Research Center for Life Science and Human Health, Binjiang Institute of Zhejiang University Hangzhou, China; Cancer Center, Zhejiang University, Hangzhou, China; Institute of Gastroenterology, Zhejiang University, Hangzhou, China.
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2
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Wang D, Li Y, Yang H, Shen X, Shi X, Li C, Zhang Y, Liu X, Jiang B, Zhu X, Zhang H, Li X, Bai H, Yang Q, Gao W, Bai F, Ji Y, Chen Q, Ben J. Disruption of TIGAR-TAK1 alleviates immunopathology in a murine model of sepsis. Nat Commun 2024; 15:4340. [PMID: 38773142 PMCID: PMC11109194 DOI: 10.1038/s41467-024-48708-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 05/11/2024] [Indexed: 05/23/2024] Open
Abstract
Macrophage-orchestrated inflammation contributes to multiple diseases including sepsis. However, the underlying mechanisms remain to be defined clearly. Here, we show that macrophage TP53-induced glycolysis and apoptosis regulator (TIGAR) is up-regulated in murine sepsis models. When myeloid Tigar is ablated, sepsis induced by either lipopolysaccharide treatment or cecal ligation puncture in male mice is attenuated via inflammation inhibition. Mechanistic characterizations indicate that TIGAR directly binds to transforming growth factor β-activated kinase (TAK1) and promotes tumor necrosis factor receptor-associated factor 6-mediated ubiquitination and auto-phosphorylation of TAK1, in which residues 152-161 of TIGAR constitute crucial motif independent of its phosphatase activity. Interference with the binding of TIGAR to TAK1 by 5Z-7-oxozeaenol exhibits therapeutic effects in male murine model of sepsis. These findings demonstrate a non-canonical function of macrophage TIGAR in promoting inflammation, and confer a potential therapeutic target for sepsis by disruption of TIGAR-TAK1 interaction.
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Affiliation(s)
- Dongdong Wang
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
- The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China
- Key Laboratory of Cardiovascular and Cerebrovascular Medicine, Nanjing Medical University, Nanjing, China
| | - Yanxia Li
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
- The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou Medical Center, Nanjing Medical University, Nanjing, China
| | - Hao Yang
- School of Life Science and Technology, and Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
| | - Xiaoqi Shen
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Xiaolin Shi
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Chenyu Li
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Yongjing Zhang
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Xiaoyu Liu
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Bin Jiang
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Xudong Zhu
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Hanwen Zhang
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Xiaoyu Li
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Hui Bai
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Qing Yang
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
| | - Wei Gao
- The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou Medical Center, Nanjing Medical University, Nanjing, China
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Fang Bai
- School of Life Science and Technology, and Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
| | - Yong Ji
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China
- Key Laboratory of Cardiovascular and Cerebrovascular Medicine, Nanjing Medical University, Nanjing, China
| | - Qi Chen
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China.
- The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University, Nanjing, China.
| | - Jingjing Ben
- Department of Pathophysiology, Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Nanjing Medical University, Nanjing, China.
- The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi People's Hospital, Wuxi Medical Center, Nanjing Medical University, Nanjing, China.
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3
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Huang B, Lang X, Li X. The role of TIGAR in nervous system diseases. Front Aging Neurosci 2022; 14:1023161. [DOI: 10.3389/fnagi.2022.1023161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 10/05/2022] [Indexed: 11/10/2022] Open
Abstract
TP53-induced glycolysis and apoptosis regulator (TIGAR) mainly regulates pentose phosphate pathway by inhibiting glycolysis, so as to synthesize ribose required by DNA, promote DNA damage repair and cell proliferation, maintain cell homeostasis and avoid body injury. Its physiological functions include anti-oxidative stress, reducing inflammation, maintaining mitochondrial function, inhibiting apoptosis, reducing autophagy etc. This paper reviews the research of TIGAR in neurological diseases, including stroke, Parkinson’s disease (PD), Alzheimer’s disease (AD), seizures and brain tumors, aiming to provide reference for the development of new therapeutic targets.
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The Expression of TP53-Induced Glycolysis and Apoptosis Regulator (TIGAR) Can Be Controlled by the Antioxidant Orchestrator NRF2 in Human Carcinoma Cells. Int J Mol Sci 2022; 23:ijms23031905. [PMID: 35163828 PMCID: PMC8836827 DOI: 10.3390/ijms23031905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 02/06/2023] Open
Abstract
Hyperactivation of the KEAP1-NRF2 axis is a common molecular trait in carcinomas from different origin. The transcriptional program induced by NRF2 involves antioxidant and metabolic genes that render cancer cells more capable of dealing with oxidative stress. The TP53-Induced Glycolysis and Apoptosis Regulator (TIGAR) is an important regulator of glycolysis and the pentose phosphate pathway that was described as a p53 response gene, yet TIGAR expression is detected in p53-null tumors. In this study we investigated the role of NRF2 in the regulation of TIGAR in human carcinoma cell lines. Exposure of carcinoma cells to electrophilic molecules or overexpression of NRF2 significantly increased expression of TIGAR, in parallel to the known NRF2 target genes NQO1 and G6PD. The same was observed in TP53KO cells, indicating that NRF2-mediated regulation of TIGAR is p53-independent. Accordingly, downregulation of NRF2 decreased the expression of TIGAR in carcinoma cell lines from different origin. As NRF2 is essential in the bone, we used mouse primary osteoblasts to corroborate our findings. The antioxidant response elements for NRF2 binding to the promoter of human and mouse TIGAR were described. This study provides the first evidence that NRF2 controls the expression of TIGAR at the transcriptional level.
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Vlatkovic T, Veldwijk MR, Giordano FA, Herskind C. Targeting Cell Cycle Checkpoint Kinases to Overcome Intrinsic Radioresistance in Brain Tumor Cells. Cancers (Basel) 2022; 14:cancers14030701. [PMID: 35158967 PMCID: PMC8833533 DOI: 10.3390/cancers14030701] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 01/27/2022] [Indexed: 02/01/2023] Open
Abstract
Simple Summary As cell cycle checkpoint mechanisms maintain genomic integrity, the inhibition of enzymes involved in these control mechanisms may increase the sensitivity of the cells to DNA damaging treatments. In this review, we summarize the knowledge in the field of brain tumor treatment with radiation therapy and cell cycle checkpoint inhibition via targeting ATM, ATR, CHK1, CHK2, and WEE1 kinases. Abstract Radiation therapy is an important part of the standard of care treatment of brain tumors. However, the efficacy of radiation therapy is limited by the radioresistance of tumor cells, a phenomenon held responsible for the dismal prognosis of the most aggressive brain tumor types. A promising approach to radiosensitization of tumors is the inhibition of cell cycle checkpoint control responsible for cell cycle progression and the maintenance of genomic integrity. Inhibition of the kinases involved in these control mechanisms can abolish cell cycle checkpoints and DNA damage repair and thus increase the sensitivity of tumor cells to radiation and chemotherapy. Here, we discuss preclinical progress in molecular targeting of ATM, ATR, CHK1, CHK2, and WEE1, checkpoint kinases in the treatment of brain tumors, and review current clinical phase I-II trials.
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Affiliation(s)
- Tijana Vlatkovic
- Cellular and Molecular Radiation Oncology Lab, Department of Radiation Oncology, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany; (T.V.); (M.R.V.)
| | - Marlon R. Veldwijk
- Cellular and Molecular Radiation Oncology Lab, Department of Radiation Oncology, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany; (T.V.); (M.R.V.)
| | - Frank A. Giordano
- Department of Radiation Oncology, Center for Integrated Oncology (CIO), University Hospital Bonn, University of Bonn, 53127 Bonn, Germany;
| | - Carsten Herskind
- Cellular and Molecular Radiation Oncology Lab, Department of Radiation Oncology, Universitätsmedizin Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany; (T.V.); (M.R.V.)
- Correspondence: ; Tel.: +49-621-383-3773
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Wei M, Peng J, Wu P, Chen P, Yang H, Cui Y, Yang L. Prognostic value of TIGAR and LC3B protein expression in nasopharyngeal carcinoma. Cancer Manag Res 2018; 10:5605-5616. [PMID: 30519107 PMCID: PMC6237137 DOI: 10.2147/cmar.s175501] [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] [Indexed: 01/02/2023] Open
Abstract
Purpose Autophagy, the process responsible for degrading cytoplasmic organelles to sustain cellular metabolism, has been associated with cancer initiation and progression. As TP53-induced glycolysis and apoptosis regulator (TIGAR) is among the important genes that can regulate autophagy, we aimed to investigate the correlation between the expression levels of TIGAR and the autophagy-related protein microtubule-associated protein 1 light chain 3 (LC3B), as well as their association with clinical outcomes, in nasopharyngeal carcinoma (NPC) patients. Methods We detected the expressions of TIGAR and LC3B in 182 NPC tissue samples via immunohistochemical staining. Results A significant correlation between TIGAR and LC3B expressions was identified (P=0.045). Moreover, survival analysis showed that TIGAR− or LC3B+ expression was associated with improved overall survival, local regional failure-free survival, distant failure-free survival, and failure-free survival rates, compared with TIGAR+ or LC3B− expression, respectively. Meanwhile, when combining TIGAR with LC3B expression in terms of prognostic value, patients with TIGAR+/LC3B− expression were significantly disadvantaged with regard to overall survival, local regional failure-free survival, distant failure-free survival, and failure-free survival compared with other groups based on the log-rank test and Cox regression analyses (all P<0.05). Conclusion TIGAR and LC3B may be novel biomarkers for predicting the prognosis of NPC patients and could be utilized as potential targets for future therapeutics aimed at treating NPC patients.
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Affiliation(s)
- Min Wei
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, People's Republic of China, ;
| | - Jinxia Peng
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, People's Republic of China, ;
| | - Peng Wu
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, People's Republic of China, ;
| | - Ping Chen
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, People's Republic of China, ;
| | - Hongru Yang
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, People's Republic of China, ;
| | - Yongxia Cui
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, People's Republic of China, ;
| | - Linglin Yang
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, People's Republic of China, ;
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Bartrons R, Simon-Molas H, Rodríguez-García A, Castaño E, Navarro-Sabaté À, Manzano A, Martinez-Outschoorn UE. Fructose 2,6-Bisphosphate in Cancer Cell Metabolism. Front Oncol 2018; 8:331. [PMID: 30234009 PMCID: PMC6131595 DOI: 10.3389/fonc.2018.00331] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 08/01/2018] [Indexed: 01/28/2023] Open
Abstract
For a long time, pioneers in the field of cancer cell metabolism, such as Otto Warburg, have focused on the idea that tumor cells maintain high glycolytic rates even with adequate oxygen supply, in what is known as aerobic glycolysis or the Warburg effect. Recent studies have reported a more complex situation, where the tumor ecosystem plays a more critical role in cancer progression. Cancer cells display extraordinary plasticity in adapting to changes in their tumor microenvironment, developing strategies to survive and proliferate. The proliferation of cancer cells needs a high rate of energy and metabolic substrates for biosynthesis of biomolecules. These requirements are met by the metabolic reprogramming of cancer cells and others present in the tumor microenvironment, which is essential for tumor survival and spread. Metabolic reprogramming involves a complex interplay between oncogenes, tumor suppressors, growth factors and local factors in the tumor microenvironment. These factors can induce overexpression and increased activity of glycolytic isoenzymes and proteins in stromal and cancer cells which are different from those expressed in normal cells. The fructose-6-phosphate/fructose-1,6-bisphosphate cycle, catalyzed by 6-phosphofructo-1-kinase/fructose 1,6-bisphosphatase (PFK1/FBPase1) isoenzymes, plays a key role in controlling glycolytic rates. PFK1/FBpase1 activities are allosterically regulated by fructose-2,6-bisphosphate, the product of the enzymatic activity of the dual kinase/phosphatase family of enzymes: 6-phosphofructo-2-kinase/fructose 2,6-bisphosphatase (PFKFB1-4) and TP53-induced glycolysis and apoptosis regulator (TIGAR), which show increased expression in a significant number of tumor types. In this review, the function of these isoenzymes in the regulation of metabolism, as well as the regulatory factors modulating their expression and activity in the tumor ecosystem are discussed. Targeting these isoenzymes, either directly or by inhibiting their activating factors, could be a promising approach for treating cancers.
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Affiliation(s)
- Ramon Bartrons
- Unitat de Bioquímica, Departament de Ciències Fisiològiques, Universitat de Barcelona, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Catalunya, Spain
| | - Helga Simon-Molas
- Unitat de Bioquímica, Departament de Ciències Fisiològiques, Universitat de Barcelona, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Catalunya, Spain
| | - Ana Rodríguez-García
- Unitat de Bioquímica, Departament de Ciències Fisiològiques, Universitat de Barcelona, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Catalunya, Spain
| | - Esther Castaño
- Centres Científics i Tecnològics, Universitat de Barcelona, Catalunya, Spain
| | - Àurea Navarro-Sabaté
- Unitat de Bioquímica, Departament de Ciències Fisiològiques, Universitat de Barcelona, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Catalunya, Spain
| | - Anna Manzano
- Unitat de Bioquímica, Departament de Ciències Fisiològiques, Universitat de Barcelona, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Catalunya, Spain
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Abstract
The ATM gene is mutated in the syndrome, ataxia-telangiectasia (AT), which is characterized by predisposition to cancer. Patients with AT have an elevated risk of breast and brain tumors Carrying mutations in ATM, patients with AT have an elevated risk of breast and brain tumors. An increased frequency of ATM mutations has also been reported in patients with breast and brain tumors; however, the magnitude of this risk remains uncertain. With the exception of a few common mutations, the spectrum of ATM alterations is heterogeneous in diverse populations, and appears to be remarkably dependent on the ethnicity of patients. This review aims to provide an easily accessible summary of common variants in different populations which could be useful in ATM screening programs. In addition, we have summarized previous research on ATM, including its molecular functions. We attempt to demonstrate the significance of ATM in exploration of breast and brain tumors and its potential as a therapeutic target.
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Affiliation(s)
- Mehrdad Asghari Estiar
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran 14155-6447, Iran
| | - Parvin Mehdipour
- Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran 14155-6447, Iran
- Parvin Mehdipour
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Shen M, Zhao X, Zhao L, Shi L, An S, Huang G, Liu J. Met is involved in TIGAR-regulated metastasis of non-small-cell lung cancer. Mol Cancer 2018; 17:88. [PMID: 29753331 PMCID: PMC5948872 DOI: 10.1186/s12943-018-0839-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Accepted: 04/27/2018] [Indexed: 01/04/2023] Open
Abstract
TIGAR is a p53 target gene that is known to protect cells from ROS-induced apoptosis by promoting the pentose phosphate pathway. The role of TIGAR in tumor cell invasion and metastasis remains elusive. Here we found that downregulation of TIGAR reduced the invasion and metastasis of NSCLC cells in vitro and in vivo. Immunohistochemical analysis of 72 NSCLC patients showed that TIGAR and Met protein expression was positively correlated with late stages of lung cancer. Besides, patients with high co-expression of TIGAR and Met presented a significantly worse survival. In addition, we found that Met signaling pathway is involved in TIGAR-induced invasion and metastasis. Our study indicates that TIGAR/Met pathway may be a novel target for NSCLC therapy. It is necessary to evaluate the expression of TIGAR before Met inhibitors are used for NSCLC treatment.
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Affiliation(s)
- Mengqin Shen
- Department of Nuclear Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.,Institute of Nuclear Medicine, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Xiaoping Zhao
- Department of Nuclear Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.,Institute of Nuclear Medicine, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Li Zhao
- Department of Nuclear Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.,Institute of Nuclear Medicine, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Liang Shi
- Department of Nuclear Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.,Institute of Nuclear Medicine, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Shuxian An
- Department of Nuclear Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.,Institute of Nuclear Medicine, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Gang Huang
- Department of Nuclear Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China. .,Shanghai Key Laboratory for Molecular Imaging, Collaborative Scientific Research Center, Shanghai University of Medicine & Health Science, Shanghai, 200093, China. .,Institute of Nuclear Medicine, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.
| | - Jianjun Liu
- Department of Nuclear Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China. .,Institute of Nuclear Medicine, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.
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Li J, Han Y, Zhou D, Zhou Y, Ye M, Wang H, Du Z. Downregulation of Survivin Gene Expression Affects Ionizing Radiation Resistance of Human T98 Glioma Cells. Cell Mol Neurobiol 2018; 38:861-868. [PMID: 29098505 DOI: 10.1007/s10571-017-0560-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 10/16/2017] [Indexed: 12/15/2022]
Abstract
Survivin is a tumor-associated gene, which has been detected in a wide variety of human tumors. Previous research has shown that Survivin can affect hepatoma carcinoma cell radiosensitivity. However, little is known about the role of Survivin in ionizing radiation resistance in glioma cells. In this study, we aimed to identify the effects of Survivin on ionizing radiation resistance in glioma cell line T98. Our results showed that downregulation of Survivin gene expression and ionizing irradiation could both inhibit T98 cell proliferation by assays in vitro including CCK-8 and immunohistochemistry. The inhibitory effect of downregulation of Survivin combined with irradiation was the most significant compared with other groups. Results of Western blotting and flow cytometric analysis also showed that downregulation of Survivin combined with the irradiation group achieved the highest apoptosis rate. Experimental results in vivo by intracranial implanting into nude mice were consistent with those in vitro. These findings indicated that ionizing radiation resistance of human T98 glioma cells can be inhibited effectively after Survivin gene silencing.
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Affiliation(s)
- Jicheng Li
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, Jiangsu, People's Republic of China
| | - Yong Han
- Department of Neurosurgery, Children's Hospital of Soochow University, Suzhou, 215000, Jiangsu, People's Republic of China
| | - Dai Zhou
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, Jiangsu, People's Republic of China
| | - Youxin Zhou
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, Jiangsu, People's Republic of China
| | - Ming Ye
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, Jiangsu, People's Republic of China.
| | - Hangzhou Wang
- Department of Neurosurgery, Children's Hospital of Soochow University, Suzhou, 215000, Jiangsu, People's Republic of China.
| | - Ziwei Du
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, 188 Shizi Street, Suzhou, 215006, Jiangsu, People's Republic of China
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Tang Y, Kwon H, Neel BA, Kasher-Meron M, Pessin JB, Yamada E, Pessin JE. The fructose-2,6-bisphosphatase TIGAR suppresses NF-κB signaling by directly inhibiting the linear ubiquitin assembly complex LUBAC. J Biol Chem 2018; 293:7578-7591. [PMID: 29650758 DOI: 10.1074/jbc.ra118.002727] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 04/05/2018] [Indexed: 12/28/2022] Open
Abstract
The systems integration of whole-body metabolism and immune signaling are central homeostatic mechanisms necessary for maintenance of normal physiology, and dysregulation of these processes leads to a variety of chronic disorders. However, the intracellular mechanisms responsible for cell-autonomous cross-talk between the inflammatory signaling pathways and metabolic flux have remained enigmatic. In this study, we discovered that the fructose-2,6-bisphosphatase TIGAR (Tp53-induced glycolysis and apoptosis regulator) critically regulates NF-κB activation. We found that TIGAR potently inhibits NF-κB-dependent gene expression by suppressing the upstream activation of IKKβ phosphorylation and kinase activation. This inhibition occurred through a direct binding competition between NEMO and TIGAR for association with the linear ubiquitination assembly complex (LUBAC). This competition prevented linear ubiquitination of NEMO, which is required for activation of IKKβ and other downstream targets. Furthermore, a TIGAR phosphatase activity-deficient mutant was equally effective as WT TIGAR in inhibiting NEMO linear ubiquitination, IKKβ phosphorylation/activation, and NF-κB signaling, indicating that TIGAR's effect on NF-κB signaling is due to its interaction with LUBAC. Physiologically, TIGAR knockout mice displayed enhanced adipose tissue NF-κB signaling, whereas adipocyte-specific overexpression of TIGAR suppressed adipose tissue NF-κB signaling. Together, these results demonstrate that TIGAR has a nonenzymatic molecular function that modulates the NF-κB signaling pathway by directly inhibiting the E3 ligase activity of LUBAC.
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Affiliation(s)
- Yan Tang
- From the Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461
| | - Hyokjoon Kwon
- the Rutgers Robert Wood Johnson School of Medicine, Rutgers University, Piscataway, New Jersey 08854
| | | | - Michal Kasher-Meron
- From the Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461
| | - Jacob B Pessin
- From the Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461
| | - Eijiro Yamada
- the Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Maebashi 371-8511, Japan, and
| | - Jeffrey E Pessin
- From the Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461, .,the Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, New York 10461
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12
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Vallée A, Lecarpentier Y, Guillevin R, Vallée JN. Interactions between TGF-β1, canonical WNT/β-catenin pathway and PPAR γ in radiation-induced fibrosis. Oncotarget 2017; 8:90579-90604. [PMID: 29163854 PMCID: PMC5685775 DOI: 10.18632/oncotarget.21234] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 08/17/2017] [Indexed: 12/16/2022] Open
Abstract
Radiation therapy induces DNA damage and inflammation leading to fibrosis. Fibrosis can occur 4 to 12 months after radiation therapy. This process worsens with time and years. Radiation-induced fibrosis is characterized by fibroblasts proliferation, myofibroblast differentiation, and synthesis of collagen, proteoglycans and extracellular matrix. Myofibroblasts are non-muscle cells that can contract and relax. Myofibroblasts evolve towards irreversible retraction during fibrosis process. In this review, we discussed the interplays between transforming growth factor-β1 (TGF-β1), canonical WNT/β-catenin pathway and peroxisome proliferator-activated receptor gamma (PPAR γ) in regulating the molecular mechanisms underlying the radiation-induced fibrosis, and the potential role of PPAR γ agonists. Overexpression of TGF-β and canonical WNT/β-catenin pathway stimulate fibroblasts accumulation and myofibroblast differentiation whereas PPAR γ expression decreases due to the opposite interplay of canonical WNT/β-catenin pathway. Both TGF-β1 and canonical WNT/β-catenin pathway stimulate each other through the Smad pathway and non-Smad pathways such as phosphatidylinositol 3-kinase/serine/threonine kinase (PI3K/Akt) signaling. WNT/β-catenin pathway and PPAR γ interact in an opposite manner. PPAR γ agonists decrease β-catenin levels through activation of inhibitors of the WNT pathway such as Smad7, glycogen synthase kinase-3 (GSK-3 β) and dickkopf-related protein 1 (DKK1). PPAR γ agonists also stimulate phosphatase and tensin homolog (PTEN) expression, which decreases both TGF-β1 and PI3K/Akt pathways. PPAR γ agonists by activating Smad7 decrease Smads pathway and then TGF-β signaling leading to decrease radiation-induced fibrosis. TGF-β1 and canonical WNT/β-catenin pathway promote radiation-induced fibrosis whereas PPAR γ agonists can prevent radiation-induced fibrosis.
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Affiliation(s)
- Alexandre Vallée
- Experimental and Clinical Neurosciences Laboratory, INSERM U1084, University of Poitiers, Poitiers, France.,Laboratory of Mathematics and Applications (LMA), UMR CNRS 7348, University of Poitiers, Poitiers, France
| | - Yves Lecarpentier
- Centre de Recherche Clinique, Grand Hôpital de l'Est Francilien (GHEF), Meaux, France
| | - Rémy Guillevin
- DACTIM, UMR CNRS 7348, University of Poitiers et CHU de Poitiers, Poitiers, France
| | - Jean-Noël Vallée
- Laboratory of Mathematics and Applications (LMA), UMR CNRS 7348, University of Poitiers, Poitiers, France.,CHU Amiens Picardie, University of Picardie Jules Verne (UPJV), Amiens, France
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13
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SIRT6 regulated nucleosomal occupancy affects Hexokinase 2 expression. Exp Cell Res 2017; 357:98-106. [DOI: 10.1016/j.yexcr.2017.05.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 05/01/2017] [Accepted: 05/03/2017] [Indexed: 11/20/2022]
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14
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Ghildiyal R, Sen E. CK2 induced RIG-I drives metabolic adaptations in IFNγ-treated glioma cells. Cytokine 2017; 89:219-228. [PMID: 26631910 DOI: 10.1016/j.cyto.2015.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 10/06/2015] [Accepted: 10/20/2015] [Indexed: 12/16/2022]
Abstract
Given the known anti-tumorigenic properties of IFNγ, its effect on glioma cell survival was investigated. Though IFNγ had no effect on glioma cell viability, it induced cell cycle arrest. This was accompanied by increased expression of p53 and retinoic acid inducible gene (RIG-I). While RIG-I had no effect on glioma cell survival, it increased expression of p53 and its downstream target TP53 induced glycolysis and apoptosis regulator (TIGAR). IFNγ induced mitochondrial co-localization of RIG-I was concomitant with its ability to regulate ROS generation, oxidative phosphorylation (OXPHOS) and key enzymes involved in glycolysis and pentose phosphate pathway. Importantly, metabolic gene profiling indicated a suppressed glycolytic pathway in glioma cells upon IFNγ treatment. In addition, IFNγ mediated increase in casein kinase 2 (CK2) expression positively regulated RIG-I expression. These findings demonstrate how IFNγ induced CK2 regulates RIG-I to drive a complex program of metabolic adaptation and redox homeostasis, crucial for determining glioma cell fate.
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Affiliation(s)
- Ruchi Ghildiyal
- National Brain Research Centre, Manesar 122 051, Haryana, India
| | - Ellora Sen
- National Brain Research Centre, Manesar 122 051, Haryana, India.
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15
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Qian S, Li J, Hong M, Zhu Y, Zhao H, Xie Y, Huang J, Lian Y, Li Y, Wang S, Mao J, Chen Y. TIGAR cooperated with glycolysis to inhibit the apoptosis of leukemia cells and associated with poor prognosis in patients with cytogenetically normal acute myeloid leukemia. J Hematol Oncol 2016; 9:128. [PMID: 27884166 PMCID: PMC5123356 DOI: 10.1186/s13045-016-0360-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 11/17/2016] [Indexed: 11/10/2022] Open
Abstract
Background Cancer cells show increased glycolysis and take advantage of this metabolic pathway to generate ATP. The TP53-induced glycolysis and apoptosis regulator (TIGAR) inhibits aerobic glycolysis and protects tumor cells from intracellular reactive oxygen species (ROS)-associated apoptosis. However, the function of TIGAR in glycolysis and survival of acute myeloid leukemia cells remains unclear. Methods We analyzed TIGAR expression in cytogenetically normal (CN-) AML patients and the correlations with clinical and biological parameters. In vivo and in vitro, we tested whether glycolysis may induce TIGAR expression and evaluated the combination effect of glycolysis inhibitor and TIGAR knockdown on human leukemia cell proliferation. Results High TIGAR expression was an independent predictor of poor survival and high incidence of relapse in adult patients with CN-AML. TIGAR also showed high expression in multiple human leukemia cell lines and knockdown of TIGAR activated glycolysis through PFKFB3 upregulation in human leukemia cells. Knockdown of TIGAR inhibited the proliferation of human leukemia cells and sensitized leukemia cells to glycolysis inhibitor both in vitro and in vivo. Furthermore, TIGAR knockdown in combination with glycolysis inhibitor 2-DG led leukemia cells to apoptosis. In addition, the p53 activator Nutlin-3α showed a significant combinational effect with TIGAR knockdown in leukemia cells. However, TIGAR expression and its anti-apoptotic effects were uncoupled from overexpression of exogenous p53 in leukemia cells. Conclusions TIGAR might be a predictor of poor survival and high incidence of relapse in AML patients, and the combination of TIGAR inhibitors with anti-glycolytic agents may be novel therapies for the future clinical use in AML patients. Electronic supplementary material The online version of this article (doi:10.1186/s13045-016-0360-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sixuan Qian
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Jianyong Li
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Ming Hong
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Yu Zhu
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Huihui Zhao
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Yue Xie
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Jiayu Huang
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Yun Lian
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Yanru Li
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Shuai Wang
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Jianping Mao
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China
| | - Yaoyu Chen
- Department of Hematology, The First Affiliated Hospital of Nanjing Medical University, Jiangsu Province Hospital, 300 Guangzhou Road, Nanjing, 210029, China.
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16
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Ko YH, Domingo-Vidal M, Roche M, Lin Z, Whitaker-Menezes D, Seifert E, Capparelli C, Tuluc M, Birbe RC, Tassone P, Curry JM, Navarro-Sabaté À, Manzano A, Bartrons R, Caro J, Martinez-Outschoorn U. TP53-inducible Glycolysis and Apoptosis Regulator (TIGAR) Metabolically Reprograms Carcinoma and Stromal Cells in Breast Cancer. J Biol Chem 2016; 291:26291-26303. [PMID: 27803158 DOI: 10.1074/jbc.m116.740209] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 10/17/2016] [Indexed: 12/11/2022] Open
Abstract
A subgroup of breast cancers has several metabolic compartments. The mechanisms by which metabolic compartmentalization develop in tumors are poorly characterized. TP53 inducible glycolysis and apoptosis regulator (TIGAR) is a bisphosphatase that reduces glycolysis and is highly expressed in carcinoma cells in the majority of human breast cancers. Hence we set out to determine the effects of TIGAR expression on breast carcinoma and fibroblast glycolytic phenotype and tumor growth. The overexpression of this bisphosphatase in carcinoma cells induces expression of enzymes and transporters involved in the catabolism of lactate and glutamine. Carcinoma cells overexpressing TIGAR have higher oxygen consumption rates and ATP levels when exposed to glutamine, lactate, or the combination of glutamine and lactate. Coculture of TIGAR overexpressing carcinoma cells and fibroblasts compared with control cocultures induce more pronounced glycolytic differences between carcinoma and fibroblast cells. Carcinoma cells overexpressing TIGAR have reduced glucose uptake and lactate production. Conversely, fibroblasts in coculture with TIGAR overexpressing carcinoma cells induce HIF (hypoxia-inducible factor) activation with increased glucose uptake, increased 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase-3 (PFKFB3), and lactate dehydrogenase-A expression. We also studied the effect of this enzyme on tumor growth. TIGAR overexpression in carcinoma cells increases tumor growth in vivo with increased proliferation rates. However, a catalytically inactive variant of TIGAR did not induce tumor growth. Therefore, TIGAR expression in breast carcinoma cells promotes metabolic compartmentalization and tumor growth with a mitochondrial metabolic phenotype with lactate and glutamine catabolism. Targeting TIGAR warrants consideration as a potential therapy for breast cancer.
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Affiliation(s)
| | | | | | - Zhao Lin
- From the Department of Medical Oncology
| | | | - Erin Seifert
- the Department of Pathology, Anatomy, and Cell Biology
| | | | | | - Ruth C Birbe
- Department of Pathology, Cooper University Hospital, Camden, New Jersey 08103
| | - Patrick Tassone
- the Department of Otolaryngology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Joseph M Curry
- the Department of Otolaryngology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
| | - Àurea Navarro-Sabaté
- the Department of Physiological Sciences, University of Barcelona, Barcelona 08907, Spain, and
| | - Anna Manzano
- the Department of Physiological Sciences, University of Barcelona, Barcelona 08907, Spain, and
| | - Ramon Bartrons
- the Department of Physiological Sciences, University of Barcelona, Barcelona 08907, Spain, and
| | - Jaime Caro
- the Department of Medicine, Cardeza Foundation for Hematological Research, Thomas Jefferson University, Philadelphia, Pennsylvania 19107
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17
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Ahmad F, Dixit D, Joshi SD, Sen E. G9a inhibition induced PKM2 regulates autophagic responses. Int J Biochem Cell Biol 2016; 78:87-95. [PMID: 27417236 DOI: 10.1016/j.biocel.2016.07.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 07/04/2016] [Accepted: 07/11/2016] [Indexed: 12/12/2022]
Abstract
Epigenetic regulation by histone methyltransferase G9a is known to control autophagic responses. As the link between autophagy and metabolic homeostasis is widely accepted, we investigated whether G9a affects metabolic circuitries to affect autophagic response in glioma cells. Both pharmacological inhibition and siRNA mediated knockdown of G9a increased autophagy marker LC3B in glioma cells. G9a inhibitor BIX-01294 (BIX) induced Akt-dependent increase in HIF-1α expression and activity. Inhibition of Akt-HIF-1α axis reversed BIX-mediated (i) increase in LC3B expression and (ii) decrease in Yes-associated protein 1 (YAP1) phosphorylation. YAP1 over-expression abrogated BIX induced increase in LC3B expression. Interestingly, BIX induced increase in metabolic modelers TIGAR (TP53-induced glycolysis and apoptosis regulator) and PKM2 (Pyruvate kinase M2) were crucial for BIX-mediated changes, as transfection with TIGAR mutant or PKM2 siRNA reversed BIX-mediated alterations in pYAP1 and LC3B expression. Coherent with the in vitro observation, BIX had no significant effect on the tumor burden in heterotypic xenograft glioma mouse model. Elevated LC3B and PKM2 in BIX-treated xenograft tissue was accompanied by decreased YAP1 levels. Taken together, our findings suggest that Akt-HIF-1α axis driven PKM2-YAP1 cross talk activates autophagic responses in glioma cells upon G9a inhibition.
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Affiliation(s)
- Fahim Ahmad
- National Brain Research Centre, Manesar, Haryana, India
| | - Deobrat Dixit
- National Brain Research Centre, Manesar, Haryana, India
| | | | - Ellora Sen
- National Brain Research Centre, Manesar, Haryana, India.
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18
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McMullen PD, Pendse S, Adeleye Y, Carmichael PL, Andersen ME, Clewell RA. Using Transcriptomics to Evaluate Thresholds in Genotoxicity Dose–Response. TOXICOGENOMICS IN PREDICTIVE CARCINOGENICITY 2016. [DOI: 10.1039/9781782624059-00185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Several genotoxic chemicals have been reported to produce threshold-shaped dose–response curves for mutation and genotoxicity assays, both in vivo and in vitro, challenging the current default practice for risk assessment of genotoxic chemicals, which assumes a linear dose–response below the lowest tested dose. Statistical methods cannot determine whether a biological threshold exists with sufficient confidence to overturn this assumption of linearity. Indeed, to truly define the shape of the dose–response curves, we must look to the underlying biology and develop targeted experiments to identify and measure the key processes governing the response of the cell to DNA damage. This chapter describes a series of studies aimed at defining the key transcriptional responses. Two approaches were taken to evaluate transcriptional responses preventing micronucleus induction: (1) comparison of gene signatures for several prototype compounds at a single chemical dose that led to a similar activation of the p53-DNA damage pathway (i.e. 1.5-fold increase in total p53); and (2) evaluation of a subset of chemicals with in-depth dose–response studies. The goal of these efforts was to determine the transcriptional pathways responsible for maintaining homeostasis at low levels of DNA damage, i.e., the biological underpinning of threshold-shaped dose–response curves for mutagenicity.
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Affiliation(s)
| | - Salil Pendse
- The Hamner Institutes for Health Sciences Research Triangle Park NC USA
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19
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Pal S, Yadav P, Sainis KB, Shankar BS. TNF-α and IGF-1 differentially modulate ionizing radiation responses of lung cancer cell lines. Cytokine 2016; 101:89-98. [PMID: 27344406 DOI: 10.1016/j.cyto.2016.06.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 06/08/2016] [Accepted: 06/10/2016] [Indexed: 11/16/2022]
Abstract
The mechanism by which tumor microenvironment derived cytokine network modulates therapy response is of great concern in lung cancer but is not completely understood. In this study, we evaluated the effects of tumor necrosis factor α (TNF-α) and insulin-like growth factor 1 (IGF-1) on response of lung cancer cell lines to ionizing radiation (IR). While TNF-α increased radio sensitivity and inhibited cell migration, treatment with IGF-1 promoted cell growth and increased migration. These effects of TNF- α were mediated by increased immediate activation of stress-activated protein kinases (SAPK)/jun amino-terminal kinases (JNK) and p38. IR induced DNA damage was increased by TNF- α and not altered by IGF-1. However, in IGF-1 treated cells, there was decreased γ- H2AX along with an increase in mitotic index, resulting in abnormal chromosomal segregation in the cells. Bio informatics analysis of 982 lung cancer patients revealed that higher expression of TNF- α was associated with low risk of cancer progression while overexpression of IGF-1 was correlated with high risk. Collectively, these results reveal that the cytokines in the tumor microenvironment differentially modulate radiation therapy through a variety of signaling mechanisms.
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Affiliation(s)
- Shyama Pal
- Immunology Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Poonam Yadav
- Immunology Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - K B Sainis
- Immunology Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Bhavani S Shankar
- Immunology Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India.
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20
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Kelley K, Knisely J, Symons M, Ruggieri R. Radioresistance of Brain Tumors. Cancers (Basel) 2016; 8:cancers8040042. [PMID: 27043632 PMCID: PMC4846851 DOI: 10.3390/cancers8040042] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 03/10/2016] [Accepted: 03/24/2016] [Indexed: 12/21/2022] Open
Abstract
Radiation therapy (RT) is frequently used as part of the standard of care treatment of the majority of brain tumors. The efficacy of RT is limited by radioresistance and by normal tissue radiation tolerance. This is highlighted in pediatric brain tumors where the use of radiation is limited by the excessive toxicity to the developing brain. For these reasons, radiosensitization of tumor cells would be beneficial. In this review, we focus on radioresistance mechanisms intrinsic to tumor cells. We also evaluate existing approaches to induce radiosensitization and explore future avenues of investigation.
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Affiliation(s)
- Kevin Kelley
- Radiation Medicine Department, Hofstra Northwell School of Medicine, Northwell Health, Manhasset, NY 11030, USA.
| | - Jonathan Knisely
- Radiation Medicine Department, Hofstra Northwell School of Medicine, Northwell Health, Manhasset, NY 11030, USA.
| | - Marc Symons
- The Feinstein Institute for Molecular Medicine, Hofstra Northwell School of Medicine, Northwell Health, Manhasset, NY 11030, USA.
| | - Rosamaria Ruggieri
- Radiation Medicine Department, Hofstra Northwell School of Medicine, Northwell Health, Manhasset, NY 11030, USA.
- The Feinstein Institute for Molecular Medicine, Hofstra Northwell School of Medicine, Northwell Health, Manhasset, NY 11030, USA.
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21
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Al-Khayal K, Abdulla M, Al-Obeed O, Al Kattan W, Zubaidi A, Vaali-Mohammed MA, Alsheikh A, Ahmad R. Identification of the TP53-induced glycolysis and apoptosis regulator in various stages of colorectal cancer patients. Oncol Rep 2015; 35:1281-6. [PMID: 26675982 PMCID: PMC4750753 DOI: 10.3892/or.2015.4494] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 11/13/2015] [Indexed: 12/23/2022] Open
Abstract
The TP53-induced glycolysis and apoptosis regulator (TIGAR) is a p53 target gene known to regulate glycolysis by acting as fructose bis-phosphatase (FBPase) and modulate reactive oxygen species. TIGAR expression has been implicated in oncogenesis and progression of several human cancers. However, TIGAR expression is not known in various stages of colorectal cancer (CRC). There is an increase in the colorectal cancer incidence in Saudi Arabia. We sought to analyze TIGAR expression in this ethnic group. The aim of this study was to investigate the TIGAR expression in colorectal cancer (CRC) patients from Saudi Arabia. Tissue microarray (TMA) was constructed from 22 matched colorectal tumor tissues and adjacent normal tissues. TIGAR expression was examined in TMA slide using immunohistochemistry. TIGAR mRNA was determined in 14 matched tumor tissue and adjacent normal tissue. TIGAR protein expression was also examined in CRC tumor tissues and cell lines. Statistical analyses (t-test) were applied to evaluate the significance of TIGAR expression. TIGAR mRNA level was upregulated significantly in stage II (p<0.01) and stage III (p<0.05) when compared to adjacent normal tissue. Immunohistochemical studies revealed that TIGAR expression was increased in colorectal cancer. Strong TIGAR positive staining was found in 68% (15/22) of the tumor samples with nuclear localization. TIGAR staining was found to be significantly increased in early stage (stage I and II) CRC (p<0.05) and late stage (stage III and IV) CRC (p<0.01). TIGAR protein was also found to be highly expressed in stage II and III colorectal cancer tissues and CRC cell lines. These findings indicate that TIGAR is highly expressed at the mRNA and protein levels in colorectal cancer with prominent nuclear localization. TIGAR expression may be used as a bio-marker for detection of colorectal cancer and can be used as a target for developing therapeutics for the treatment of colorectal cancer.
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Affiliation(s)
- Khayal Al-Khayal
- Colorectal Research Chair, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Maha Abdulla
- Colorectal Research Chair, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Omar Al-Obeed
- Colorectal Research Chair, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Wael Al Kattan
- Department of Surgery, College of Medicine, Al-Faisal University, Riyadh, Kingdom of Saudi Arabia
| | - Ahmad Zubaidi
- Colorectal Research Chair, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | | | - Abdulmalik Alsheikh
- Department of Pathology, King Khalid University Hospital, Riyadh, Kingdom of Saudi Arabia
| | - Rehan Ahmad
- Colorectal Research Chair, College of Medicine, King Saud University, Riyadh, Kingdom of Saudi Arabia
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22
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Zhao M, Fan J, Liu Y, Yu Y, Xu J, Wen Q, Zhang J, Fu S, Wang B, Xiang L, Feng J, Wu J, Yang L. Oncogenic role of the TP53-induced glycolysis and apoptosis regulator in nasopharyngeal carcinoma through NF-κB pathway modulation. Int J Oncol 2015; 48:756-64. [PMID: 26691054 DOI: 10.3892/ijo.2015.3297] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 12/02/2015] [Indexed: 11/06/2022] Open
Abstract
The TP53-induced glycolysis and apoptosis regulator (TIGAR) is a p53 target gene, which functions to suppress reactive oxygen species (ROS) damage and protect cells from apoptosis. In this study, we investigated the role of TIGAR in nasopharyngeal carcinoma (NPC) tumorigenesis. Imnunohistochemical analysis of the tissue specimens from nasopharyngeal carcinoma patients showed a higher expression level of TIGAR in tumor tissues, compared with normal nasopharyngeal epithelium. Knockdown of TIGAR by lentivirus-shRNA in CNE-2 or 5-8F cells resulted in decreased cell growth, colony formation, migration, invasion, and induced apoptosis. TIGAR overexpression exerted the opposite effects except for apoptosis reduction. In the xenograft tumor models, TIGAR knockdown reduced tumor growth rate and weight, whereas TIGAR overexpression showed the opposite effects. In addition, the NF-κB signaling pathway was decreased in TIGAR silenced cells. In conclusion, our data demonstrated that TIGAR acted as an oncogene in NPC tumorigenesis, and knockdown of TIGAR inhibited NPC tumor growth through the NF-κB pathway.
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Affiliation(s)
- Ming Zhao
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Juan Fan
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Yong Liu
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Yanxin Yu
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Jinhui Xu
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Qinglian Wen
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Jianwen Zhang
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Shaozhi Fu
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Biqiong Wang
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Li Xiang
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Jing Feng
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Jingbo Wu
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Linglin Yang
- Department of Oncology, The First Hospital of Sichuan Medical University, Luzhou, Sichuan 646000, P.R. China
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23
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Ghosh S, Gupta P, Sen E. TNFα driven HIF-1α-hexokinase II axis regulates MHC-I cluster stability through actin cytoskeleton. Exp Cell Res 2015; 340:116-24. [PMID: 26597758 DOI: 10.1016/j.yexcr.2015.11.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 11/14/2015] [Accepted: 11/15/2015] [Indexed: 12/24/2022]
Abstract
Hypoxia-inducible Factor-1α (HIF-1α)-regulated expression of Hexokinase-II (HKII) remains a cornerstone in the maintenance of high metabolic demands subserving various pro-tumor functions including immune evasion in gliomas. Since inflammation-induced HIF-1α regulates Major Histocompatibility Complex class I (MHC-I) gene expression, and as cytoskeletal dynamics affect MHC-I membrane clusters, we investigated the involvement of HIF-1α-HKII axis in Tumor Necrosis Factor-α (TNFα)-mediated MHC-I membrane cluster stability in glioma cells and the involvement of actin cytoskeleton in the process. TNFα increased the clustering and colocalization of MHC-I with cortical actin in a HIF-1α dependent manner. siRNA mediated knockdown of HIF-1α as well as enzymatic inhibition of HK II by Lonidamine, delocalized mitochondrially bound HKII. This altered subcellular HKII localization affected TNFα-induced cofilin activation and actin turnover, as pharmacological inhibition of HKII by Lonidamine decreased Actin-related protein 2 (ARP2)/cofilin interaction. Photobleaching studies revealed destabilization of TNFα- induced stable MHC-I membrane clusters in the presence of Lonidamine and ARP2 inhibitor CK666. This work highlights how TNFα triggers a previously unknown function of metabolic protein HKII to influence an immune related outcome. Our study establishes the importance of inflammation induced HIF-1α in integrating two crucial components- the metabolic and immune, through reorganization of cytoskeleton.
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Affiliation(s)
- Sadashib Ghosh
- Molecular & Cellular Neuroscience Division, National Brain Research Centre, Manesar, Haryana 122051, India.
| | - Piyushi Gupta
- Molecular & Cellular Neuroscience Division, National Brain Research Centre, Manesar, Haryana 122051, India
| | - Ellora Sen
- Molecular & Cellular Neuroscience Division, National Brain Research Centre, Manesar, Haryana 122051, India
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24
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Lee P, Hock AK, Vousden KH, Cheung EC. p53- and p73-independent activation of TIGAR expression in vivo. Cell Death Dis 2015; 6:e1842. [PMID: 26247727 PMCID: PMC4558498 DOI: 10.1038/cddis.2015.205] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 06/17/2015] [Accepted: 06/26/2015] [Indexed: 12/14/2022]
Abstract
TIGAR (TP53-induced glycolysis and apoptosis regulator) functions as a fructose-2,6-bisphosphatase and its expression results in a dampening of the glycolytic pathway, while increasing antioxidant capacity by increasing NADPH and GSH levels. In addition to being a p53 target, p53-independent expression of TIGAR is also seen in many human cancer cell lines that lack wild-type p53. Although human TIGAR expression can be induced by p53, TAp63 and TAp73, mouse TIGAR is less responsive to the p53 family members and basal levels of TIGAR expression does not depend on p53 or TAp73 expression in most mouse tissues in vivo. Although mouse TIGAR expression is clearly induced in the intestines of mice following DNA-damaging stress such as ionising radiation, this is also not dependent on p53 or TAp73.
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Affiliation(s)
- P Lee
- Cancer Research-UK Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
| | - A K Hock
- Cancer Research-UK Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
| | - K H Vousden
- Cancer Research-UK Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
| | - E C Cheung
- Cancer Research-UK Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
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25
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Mehdipour P, Karami F, Javan F, Mehrazin M. Linking ATM Promoter Methylation to Cell Cycle Protein Expression in Brain Tumor Patients: Cellular Molecular Triangle Correlation in ATM Territory. Mol Neurobiol 2015; 52:293-302. [PMID: 25159481 DOI: 10.1007/s12035-014-8864-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 08/14/2014] [Indexed: 02/05/2023]
Abstract
Ataxia telangiectasia mutated (ATM) is a key gene in DNA double-strand break (DSB), and therefore, most of its disabling genetic alterations play an important initiative role in many types of cancer. However, the exact role of ATM gene and its epigenetic alterations, especially promoter methylation in different grades of brain tumors, remains elusive. The current study was conducted to query possible correlations among methylation statue of ATM gene, ATM/ retinoblastoma (RB) protein expression, D1853N ATM polymorphism, telomere length (TL), and clinicopathological characteristics of various types of brain tumors. Isolated DNA from 30 fresh tissues was extracted from different types of brain tumors and two brain tissues from deceased normal healthy individuals. DNAs were treated with bisulfate sodium using DNA modification kit (Qiagen). Methylation-specific polymerase chain reaction (MSP-PCR) was implicated to determine the methylation status of treated DNA templates confirmed by promoter sequencing. Besides, the ATM and RB protein levels were determined by immunofluorescence (IF) assay using monoclonal mouse antihuman against ATM, P53, and RB proteins. To achieve an interactive correlation, the methylation data were statistically analyzed by considering TL and D1853N ATM polymorphism. More than 73% of the brain tumors were methylated in ATM gene promoter. There was strong correlation between ATM promoter methylation and its protein expression (p < 0.001). As a triangle, meaningful correlation was also found between methylated ATM promoter and ATM protein expression with D1853N ATM polymorphism (p = 0.01). ATM protein expression was not in line with RB protein expression while it was found to be significantly correlated with ATM promoter methylation (p = 0.01). There was significant correlation between TL neither with ATM promoter methylation nor with ATM protein expression nor with D1853N polymorphism. However, TL has shown strong correlation with patient's age and tumor grade (p = 0.01). Given the important role of cell cycle checkpoint proteins as well as RB and ATM in TL and cancer evolution, further assessment is warranted to shed more light on the pathway linking the telomere instability to tumor progression. High ATM methylation rate in brain tumor patients could open a new avenue toward early screening and cancer therapy.
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Affiliation(s)
- P Mehdipour
- Department of Medical Genetics, Tehran University of Medical Sciences, School of Medicine, Keshavarz Boulevard, Pour Sina Street, Tehran, Iran,
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26
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Endogenous level of TIGAR in brain is associated with vulnerability of neurons to ischemic injury. Neurosci Bull 2015. [PMID: 26219221 DOI: 10.1007/s12264-015-1538-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
In previous studies, we showed that TP53-induced glycolysis and apoptosis regulator (TIGAR) protects neurons against ischemic brain injury. In the present study, we investigated the developmental changes of TIGAR level in mouse brain and the correlation of TIGAR expression with the vulnerability of neurons to ischemic injury. We found that the TIGAR level was high in the embryonic stage, dropped at birth, partially recovered in the early postnatal period, and then continued to decline to a lower level in early adult and aged mice. The TIGAR expression was higher after ischemia/reperfusion in mouse brain 8 and 12 weeks after birth. Four-week-old mice had smaller infarct volumes, lower neurological scores, and lower mortality rates after ischemia than 8- and 12-week-old mice. TIGAR expression also increased in response to oxygen glucose deprivation (OGD)/reoxygenation insult or H2O2 treatment in cultured primary neurons from different embryonic stages (E16 and E20). The neurons cultured from the early embryonic period had a greater resistance to OGD and oxidative insult. Higher TIGAR levels correlated with higher pentose phosphate pathway activity and less oxidative stress. Older mice and more mature neurons had more severe DNA and mitochondrial damage than younger mice and less mature neurons in response to ischemia/reperfusion or OGD/reoxygenation insult. Supplementation of cultured neurons with nicotinamide adenine dinuclectide phosphate (NADPH) significantly reduced ischemic injury. These results suggest that TIGAR expression changes during development and its expression level may be correlated with the vulnerability of neurons to ischemic injury.
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Chakrabarti G, Gerber DE, Boothman DA. Expanding antitumor therapeutic windows by targeting cancer-specific nicotinamide adenine dinucleotide phosphate-biogenesis pathways. Clin Pharmacol 2015; 7:57-68. [PMID: 25870517 PMCID: PMC4381889 DOI: 10.2147/cpaa.s79760] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Nicotinamide adenine dinucleotide phosphate (NADPH) biogenesis is an essential mechanism by which both normal and cancer cells maintain redox balance. While antitumor approaches to treat cancers through elevated reactive oxygen species (ROS) are not new ideas, depleting specific NADPH-biogenesis pathways that control recovery and repair pathways are novel, viable approaches to enhance cancer therapy. However, to elicit efficacious therapies exploiting NADPH-biogenic pathways, it is crucial to understand and specifically define the roles of NADPH-biogenesis pathways used by cancer cells for survival or recovery from cell stress. It is equally important to select NADPH-biogenic pathways that are expendable or not utilized in normal tissue to avoid unwanted toxicity. Here, we address recent literature that demonstrates specific tumor-selective NADPH-biogenesis pathways that can be exploited using agents that target specific cancer cell pathways normally not utilized in normal cells. Defining NADPH-biogenesis profiles of specific cancer-types should enable novel strategies to exploit these therapeutic windows for increased efficacy against recalcitrant neoplastic disease, such as pancreatic cancers. Accomplishing the goal of using ROS as a weapon against cancer cells will also require agents, such as NQO1 bioactivatable drugs, that selectively induce elevated ROS levels in cancer cells, while normal cells are protected.
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Affiliation(s)
- Gaurab Chakrabarti
- Department of Pharmacology, UT Southwestern Medical Center, Dallas, TX, USA ; Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX, USA ; Harold C Simmons Comprehensive Cancer Center, UT Southwestern Medical Center, Dallas, TX, USA
| | - David E Gerber
- Division of Hematology and Oncology, UT Southwestern Medical Center, Dallas, TX, USA ; Harold C Simmons Comprehensive Cancer Center, UT Southwestern Medical Center, Dallas, TX, USA
| | - David A Boothman
- Department of Pharmacology, UT Southwestern Medical Center, Dallas, TX, USA ; Department of Radiation Oncology, UT Southwestern Medical Center, Dallas, TX, USA ; Harold C Simmons Comprehensive Cancer Center, UT Southwestern Medical Center, Dallas, TX, USA
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28
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Bathe OF, Farshidfar F. From genotype to functional phenotype: unraveling the metabolomic features of colorectal cancer. Genes (Basel) 2014; 5:536-60. [PMID: 25055199 PMCID: PMC4198916 DOI: 10.3390/genes5030536] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 05/27/2014] [Accepted: 06/27/2014] [Indexed: 12/12/2022] Open
Abstract
Much effort in recent years has been expended in defining the genomic and epigenetic alterations that characterize colorectal adenocarcinoma and its subtypes. However, little is known about the functional ramifications related to various subtypes. Metabolomics, the study of small molecule intermediates in disease, provides a snapshot of the functional phenotype of colorectal cancer. Data, thus far, have characterized some of the metabolic perturbations that accompany colorectal cancer. However, further studies will be required to identify biologically meaningful metabolic subsets, including those corresponding to specific genetic aberrations. Moreover, further studies are necessary to distinguish changes due to tumor and the host response to tumor.
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Affiliation(s)
- Oliver F Bathe
- Department of Surgery, Tom Baker Cancer Center, University of Calgary, 1331 29th St NW, Calgary, AB T2N 4N2, Canada.
| | - Farshad Farshidfar
- Department of Surgery, Tom Baker Cancer Center, University of Calgary, 1331 29th St NW, Calgary, AB T2N 4N2, Canada.
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29
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Li S, Zhu JH, Cao LP, Sun Q, Liu HD, Li WD, Li JS, Hang CH. Growth inhibitory in vitro effects of glycyrrhizic acid in U251 glioblastoma cell line. Neurol Sci 2014; 35:1115-20. [PMID: 24514918 DOI: 10.1007/s10072-014-1661-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 01/24/2014] [Indexed: 12/31/2022]
Abstract
Despite dramatic advances in cancer therapy, the overall prognosis of glioblastoma (GBM) remains dismal. Nuclear factor kappa-B (NF-κB) has been previously demonstrated to be constitutively activated in glioblastoma, and it was suggested as a potential therapeutic target. Glycyrrhizic acid (GA) has been proved to have cytotoxic effects in many cancer cell lines. However, its role in glioblastoma has not yet been addressed. Therefore, this study aimed to investigate the effects of GA on human glioblastoma U251 cell line. The effects of GA on proliferation of U251 cells were measured by CCK-8 assay and plate colony-forming test. Cellular apoptosis was detected by Hoechst 33258 fluorescent staining and flow cytometry with annexin V-FITC/PI dual staining. The expression of nuclear p65 protein, the active subunit of NF-κB, was determined by Western blot and immunofluorescence. Our results demonstrated that the survival rate and colony formation of U251 cells significantly decreased in a time- and dose-dependent manner after GA addition, and the apoptotic ratio of GA-treated groups was significantly higher than that of control groups. Furthermore, the expression of NF-κB-p65 in the nucleus was remarkably reduced after GA treatment. In conclusion, our findings suggest that GA treatment can confer inhibitory effects on human glioblastoma U251 cell line including inhibiting proliferation and inducing apoptosis, which is possibly related to the NF-κB mediated pathway.
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Affiliation(s)
- Song Li
- Department of Neurosurgery, Jinling Hospital, School of Medicine, Southern Medical University (Guangzhou), 305 East Zhongshan Road, Nanjing, 210002, Jiangsu, People's Republic of China
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30
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Chaetocin-induced ROS-mediated apoptosis involves ATM-YAP1 axis and JNK-dependent inhibition of glucose metabolism. Cell Death Dis 2014; 5:e1212. [PMID: 24810048 PMCID: PMC4047915 DOI: 10.1038/cddis.2014.179] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 03/24/2014] [Accepted: 03/26/2014] [Indexed: 12/23/2022]
Abstract
Oxidative stress serves as an important regulator of both apoptosis and metabolic reprogramming in tumor cells. Chaetocin, a histone methyltransferase inhibitor, is known to induce ROS generation. As elevating basal ROS level sensitizes glioma cells to apoptosis, the ability of Chaetocin in regulating apoptotic and metabolic adaptive responses in glioma was investigated. Chaetocin induced glioma cell apoptosis in a ROS-dependent manner. Increased intracellular ROS induced (i) Yes-associated protein 1 (YAP1) expression independent of the canonical Hippo pathway as well as (ii) ATM and JNK activation. Increased interaction of YAP1 with p73 and p300 induced apoptosis in an ATM-dependent manner. Chaetocin induced JNK modulated several metabolic parameters like glucose uptake, lactate production, ATP generation, and activity of glycolytic enzymes hexokinase and pyruvate kinase. However, JNK had no effect on ATM or YAP1 expression. Coherent with the in vitro findings, Chaetocin reduced tumor burden in heterotypic xenograft glioma mouse model. Chaetocin-treated tumors exhibited heightened ROS, pATM, YAP1 and pJNK levels. Our study highlights the coordinated control of glioma cell proliferation and metabolism by ROS through (i) ATM-YAP1-driven apoptotic pathway and (ii) JNK-regulated metabolic adaptation. The elucidation of these newfound connections and the roles played by ROS to simultaneously shift metabolic program and induce apoptosis could provide insights toward the development of new anti-glioma strategies.
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31
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Hennig J, McShane MP, Cordes N, Eke I. APPL proteins modulate DNA repair and radiation survival of pancreatic carcinoma cells by regulating ATM. Cell Death Dis 2014; 5:e1199. [PMID: 24763056 PMCID: PMC4001316 DOI: 10.1038/cddis.2014.167] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Revised: 03/17/2014] [Accepted: 03/18/2014] [Indexed: 11/12/2022]
Abstract
Despite intensive multimodal therapies, the overall survival rate of patients with ductal adenocarcinoma of the pancreas is still poor. The chemo- and radioresistance mechanisms of this tumor entity remain to be determined in order to develop novel treatment strategies. In cancer, endocytosis and membrane trafficking proteins are known to be utilized and they also critically regulate essential cell functions like survival and proliferation. On the basis of these data, we evaluated the role of the endosomal proteins adaptor proteins containing pleckstrin homology domain, phosphotyrosine binding domain and a leucine zipper motif (APPL)1 and 2 for the radioresistance of pancreatic carcinoma cells. Here, we show that APPL2 expression in pancreatic cancer cells is upregulated after irradiation and that depletion of APPL proteins by small interfering RNA (siRNA) significantly reduced radiation survival in parallel to impairing DNA double strand break (DSB) repair. In addition, APPL knockdown diminished radiogenic hyperphosphorylation of ataxia telangiectasia mutated (ATM). Activated ATM and APPL1 were also shown to interact after irradiation, suggesting that APPL has a more direct role in the phosphorylation of ATM. Double targeting of APPL proteins and ATM caused similar radiosensitization and concomitant DSB repair perturbation to that observed after depletion of single proteins, indicating that ATM is the central modulator of APPL-mediated effects on radiosensitivity and DNA repair. These data strongly suggest that endosomal APPL proteins contribute to the DNA damage response. Whether targeting of APPL proteins is beneficial for the survival of patients with pancreatic adenocarcinoma remains to be elucidated.
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Affiliation(s)
- J Hennig
- OncoRay—National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz-Zentrum Dresden-Rossendorf, 01307 Dresden, Germany
| | - M P McShane
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - N Cordes
- OncoRay—National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz-Zentrum Dresden-Rossendorf, 01307 Dresden, Germany
| | - I Eke
- OncoRay—National Center for Radiation Research in Oncology, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, Helmholtz-Zentrum Dresden-Rossendorf, 01307 Dresden, Germany
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Abstract
Cancers cells shift their metabolism towards glycolysis in order to help them support the biosynthetic demands necessary to sustain cell proliferation and growth, adapt to stress and avoid excessive reactive oxygen species (ROS) accumulation. While the p53 tumor suppressor protein is known to inhibit cell growth by inducing apoptosis, senescence and cell cycle arrest, recent studies have found that p53 is also able to influence cell metabolism. TIGAR is a p53 target that functions as a fructose-2,6-bisphosphatase, thereby lowering glycolytic flux and promoting antioxidant functions. By protecting cells from oxidative stress, TIGAR may mediate some of the tumor suppressor activity of p53 but could also contribute to tumorigenesis. Here we discuss the activities of TIGAR described so far, and the potential consequences of TIGAR expression on normal and tumor cells.
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Affiliation(s)
- Pearl Lee
- Cancer Research-UK Beatson Institute, Switchback Road, Glasgow, G61 1BD, UK
| | - Karen H Vousden
- Cancer Research-UK Beatson Institute, Switchback Road, Glasgow, G61 1BD, UK
| | - Eric C Cheung
- Cancer Research-UK Beatson Institute, Switchback Road, Glasgow, G61 1BD, UK
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