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Rasam S, Lin Q, Shen S, Straubinger RM, Qu J. Highly Reproducible Quantitative Proteomics Analysis of Pancreatic Cancer Cells Reveals Proteome-Level Effects of a Novel Combination Drug Therapy That Induces Cancer Cell Death via Metabolic Remodeling and Activation of the Extrinsic Apoptosis Pathway. J Proteome Res 2023; 22:3780-3792. [PMID: 37906173 DOI: 10.1021/acs.jproteome.3c00463] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Pancreatic cancer patients have poor survival rates and are frequently treated using gemcitabine (Gem). However, initial tumor sensitivity often gives way to rapid development of resistance. Gem-based drug combinations are employed to increase efficacy and mitigate resistance, but our understanding of molecular-level drug interactions, which could assist in the development of more effective therapeutic regimens, is limited. Global quantitative proteomic analysis could provide novel mechanistic insights into drug combination interactions, but it is challenging to achieve high-quality quantitative proteomics analysis of the large sample sets that are typically required for drug combination studies. Here, we investigated molecular-level temporal interactions of Gem with BGJ398 (infigratinib), a recently approved pan-FGFR inhibitor, in multiple treatment groups (N = 42 samples) using IonStar, a robust large-scale proteomics method that employs well-controlled, ultrahigh-resolution MS1 quantification. A total of 5514 proteins in the sample set were quantified without missing data, requiring >2 unique peptides/protein, <1% protein false discovery rate (FDR), <0.1% peptide FDR, and CV < 10%. Functional analysis of the differentially altered proteins revealed drug-dysregulated processes such as metabolism, apoptosis, and antigen presentation pathways. These changes were validated experimentally using Seahorse metabolic assays and immunoassays. Overall, in-depth analysis of large-scale proteomics data provided novel insights into possible mechanisms by which FGFR inhibitors complement and enhance Gem activity in pancreatic cancers.
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Affiliation(s)
- Sailee Rasam
- Department of Biochemistry, University at Buffalo, Buffalo, New York 14260, United States
- New York State Center of Excellence in Bioinformatics and Life Sciences, 701 Ellicott Street, Buffalo, New York 14203, United States
| | - Qingxiang Lin
- Department of Pharmaceutical Sciences, University at Buffalo, Buffalo, New York 14260, United States
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, New York 14203, United States
| | - Shichen Shen
- New York State Center of Excellence in Bioinformatics and Life Sciences, 701 Ellicott Street, Buffalo, New York 14203, United States
| | - Robert M Straubinger
- New York State Center of Excellence in Bioinformatics and Life Sciences, 701 Ellicott Street, Buffalo, New York 14203, United States
- Department of Pharmaceutical Sciences, University at Buffalo, Buffalo, New York 14260, United States
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, New York 14203, United States
| | - Jun Qu
- Department of Biochemistry, University at Buffalo, Buffalo, New York 14260, United States
- New York State Center of Excellence in Bioinformatics and Life Sciences, 701 Ellicott Street, Buffalo, New York 14203, United States
- Department of Pharmaceutical Sciences, University at Buffalo, Buffalo, New York 14260, United States
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Elm and Carlton Streets, Buffalo, New York 14203, United States
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2
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Dhawan A, Pifer PM, Sandulache VC, Skinner HD. Metabolic targeting, immunotherapy and radiation in locally advanced non-small cell lung cancer: Where do we go from here? Front Oncol 2022; 12:1016217. [PMID: 36591457 PMCID: PMC9794617 DOI: 10.3389/fonc.2022.1016217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 11/24/2022] [Indexed: 12/15/2022] Open
Abstract
In the US, there are ~250,000 new lung cancer diagnoses and ~130,000 deaths per year, and worldwide there are an estimated 1.6 million deaths per year from this deadly disease. Lung cancer is the most common cause of cancer death worldwide, and it accounts for roughly a quarter of all cancer deaths in the US. Non-small cell lung cancer (NSCLC) represents 80-85% of these cases. Due to an enormous tobacco cessation effort, NSCLC rates in the US are decreasing, and the implementation of lung cancer screening guidelines and other programs have resulted in a higher percentage of patients presenting with potentially curable locoregional disease, instead of distant disease. Exciting developments in molecular targeted therapy and immunotherapy have resulted in dramatic improvement in patients' survival, in combination with new surgical, pathological, radiographical, and radiation techniques. Concurrent platinum-based doublet chemoradiation therapy followed by immunotherapy has set the benchmark for survival in these patients. However, despite these advances, ~50% of patients diagnosed with locally advanced NSCLC (LA-NSCLC) survive long-term. In patients with local and/or locoregional disease, chemoradiation is a critical component of curative therapy. However, there remains a significant clinical gap in improving the efficacy of this combined therapy, and the development of non-overlapping treatment approaches to improve treatment outcomes is needed. One potential promising avenue of research is targeting cancer metabolism. In this review, we will initially provide a brief general overview of tumor metabolism as it relates to therapeutic targeting. We will then focus on the intersection of metabolism on both oxidative stress and anti-tumor immunity. This will be followed by discussion of both tumor- and patient-specific opportunities for metabolic targeting in NSCLC. We will then conclude with a discussion of additional agents currently in development that may be advantageous to combine with chemo-immuno-radiation in NSCLC.
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Affiliation(s)
- Annika Dhawan
- Department of Radiation Oncology, UPMC Hillman Cancer Center and University of Pittsburgh, Pittsburgh, PA, United States
| | - Phillip M. Pifer
- Department of Radiation Oncology, UPMC Hillman Cancer Center and University of Pittsburgh, Pittsburgh, PA, United States
| | - Vlad C. Sandulache
- Bobby R. Alford Department of Otolaryngology-Head and Neck Surgery, Baylor College of Medicine, Houston, TX, United States
| | - Heath D. Skinner
- Department of Radiation Oncology, UPMC Hillman Cancer Center and University of Pittsburgh, Pittsburgh, PA, United States,*Correspondence: Heath D. Skinner,
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3
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Ma J, Chen X, Zhu X, Pan Z, Hao W, Li D, Zheng Q, Tang X. Luteolin potentiates low-dose oxaliplatin-induced inhibitory effects on cell proliferation in gastric cancer by inducing G 2/M cell cycle arrest and apoptosis. Oncol Lett 2021; 23:16. [PMID: 34820015 PMCID: PMC8607327 DOI: 10.3892/ol.2021.13134] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 10/13/2021] [Indexed: 01/02/2023] Open
Abstract
Although the reduction of oxaliplatin doses may alleviate deleterious side effects of gastrointestinal and gynecological cancer treatment, it also limits the anticancer therapeutic effects. As a high-efficient and low-priced herbal medicine ingredient, luteolin is an agent with a broad spectrum of anticancer activities and acts as a potential enhancer of therapeutic effects of chemotherapy agents in cancer treatment. This study focused on the antitumor effects and mechanism of combined treatment with luteolin and oxaliplatin on a mouse forestomach carcinoma (MFC) cell line. The study used CCK-8 assay, flow cytometry, Annexin V-FITC/PI double staining assay, reactive oxygen species testing assay, mitochondrial membrane potential testing assay, and western blot assay. The results showed that luteolin and oxaliplatin exerted synergistic effects on inhibiting MFC cell proliferation by inducing G2/M cell cycle arrest and apoptosis. Inhibiting the tumor necrosis factor receptor-associated protein 1/phosphorylated-extracellular-regulated protein kinases1/2/cell division cycle 25 homolog C/cyclin-dependent kinase-1/cyclin B1 pathway was indispensable to the combined treatment with luteolin and oxaliplatin to induce G2/M cell cycle arrest. In addition, luteolin increased oxidative stress in MFC cells treated with a low dose of oxaliplatin. The combined therapy damaged mitochondrial membrane potential and regulated BCL-2-associated X protein and B-cell lymphoma 2 protein expression, leading to apoptosis. Findings of the present study suggest that luteolin may be a qualified chemotherapy enhancer to potentiate the anticancer effects of low-dose oxaliplatin in MFC cells. This work provides a theoretical foundation for future research on applications of luteolin in clinical chemotherapy.
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Affiliation(s)
- Jun Ma
- College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong 266003, P.R. China.,School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Xiaojie Chen
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Xuejie Zhu
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Zhaohai Pan
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Wenjin Hao
- School of Life Sciences, Nantong University, Nantong, Jiangsu 226000, P.R. China
| | - Defang Li
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China
| | - Qiusheng Zheng
- School of Integrated Traditional Chinese and Western Medicine, Binzhou Medical University, Yantai, Shandong 264003, P.R. China.,School of Pharmacy, Shihezi University, Key Laboratory of Xinjiang Endemic Phytomedicine Resources, Ministry of Education, School of Pharmacy, Shihezi, Xinjiang 832002, P.R. China
| | - Xuexi Tang
- College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong 266003, P.R. China
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4
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Zhu Z, Parikh P, Zhao H, Givens NT, Beck DB, Willson CM, Bai Q, Wakefield MR, Fang Y. Targeting immunometabolism of neoplasms by interleukins: A promising immunotherapeutic strategy for cancer treatment. Cancer Lett 2021; 518:94-101. [PMID: 34153401 DOI: 10.1016/j.canlet.2021.06.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/23/2021] [Accepted: 06/11/2021] [Indexed: 12/23/2022]
Abstract
In recent years, tumor metabolism has become a prevalent research topic for scientists and pharmaceutical companies. As research in the field has progressed, the metabolism-based therapy of tumors has ushered in new opportunities. Most tumors emerge and evolve under selective pressure from their microenvironment, which promotes the diversification of both neoplastic and non-neoplastic compartments of the tumor microenvironment (TME), and finally reaches a certain degree of intratumoral heterogeneity. As a result of the tumor intratumoral heterogeneity, tumor cells often possess a complex energy metabolism phenotype. During tumor progression, the metabolism for both tumor parenchyma and stroma is reprogrammed. The tumor stroma mainly consists of the extracellular matrix, fibroblasts, and immune cells. Interestingly, tumor-infiltrating immune cells utilize different metabolites based on their subtype and function, and these immunometabolic pathways can be modified in the TME. In particular, interleukins play a vital role in the activation and differentiation of immune cells and have exhibited multiple effects on tumor cell neoplasia, invasion, and metastasis. In this review, we summarize the common mechanisms of interleukins affecting the tumor and tumor-infiltrating immune cells metabolically and discuss how these mechanisms may lead to novel therapeutic opportunities. This review might contribute to the novel development of cancer immunotherapy.
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Affiliation(s)
- Ziwen Zhu
- Department of Microbiology, Immunology & Pathology, Des Moines University, Des Moines, IA, USA; Department of Surgery, University of Missouri School of Medicine, Columbia, MO, USA.
| | - Pooja Parikh
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Hongyun Zhao
- Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Nathan T Givens
- Department of Microbiology, Immunology & Pathology, Des Moines University, Des Moines, IA, USA
| | - Damien B Beck
- Department of Microbiology, Immunology & Pathology, Des Moines University, Des Moines, IA, USA
| | - Conner M Willson
- Department of Microbiology, Immunology & Pathology, Des Moines University, Des Moines, IA, USA
| | - Qian Bai
- Department of Surgery, University of Missouri School of Medicine, Columbia, MO, USA
| | - Mark R Wakefield
- Department of Surgery, University of Missouri School of Medicine, Columbia, MO, USA
| | - Yujiang Fang
- Department of Microbiology, Immunology & Pathology, Des Moines University, Des Moines, IA, USA; Department of Surgery, University of Missouri School of Medicine, Columbia, MO, USA.
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5
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Lin X, Xiao Z, Chen T, Liang SH, Guo H. Glucose Metabolism on Tumor Plasticity, Diagnosis, and Treatment. Front Oncol 2020; 10:317. [PMID: 32211335 PMCID: PMC7069415 DOI: 10.3389/fonc.2020.00317] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 02/21/2020] [Indexed: 12/22/2022] Open
Abstract
Malignant cells support tumor proliferation and progression by adopting to metabolic changes. Tumor cells altered metabolism by increasing glucose uptake and fermentation of glucose to lactate, even in the aerobic state and the presence of functioning mitochondria. Glucose metabolism in tumor plasticity has attracted great interests by clinicians and scientists in the past decades. This review discusses the previous and emerging researches on the tumor plasticity altered by changing glucose metabolism in different cancer cells, including cancer stem cells (CSCs). In addition, we summarize the rising applications of glucose metabolism in tumor diagnosis and treatment. Our objective is to direct future investigation on this altered metabolic phenotype and its application in patient care.
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Affiliation(s)
- Xiaoping Lin
- Department of Nuclear Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.,Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Harvard Medical School, Massachusetts General Hospital, Boston, MA, United States
| | - Zizheng Xiao
- Department of Nuclear Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Tao Chen
- Department of Nuclear Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Steven H Liang
- Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Harvard Medical School, Massachusetts General Hospital, Boston, MA, United States
| | - Huiqin Guo
- Department of Thoracic Surgery, Beijing Sijitan Hospital, Capital Medical University, Beijing, China
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6
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Kreindler J, Amoroso P. Daily exercise is daily medicine. BJU Int 2019; 123:200-201. [DOI: 10.1111/bju.14625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jack Kreindler
- CHHP - The Centre for Health & Human Performance; London UK
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7
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Perla V, Nadimi M, Reddy R, Hankins GR, Nimmakayala P, Harris RT, Valluri J, Sirbu C, Reddy UK. Effect of ghost pepper on cell proliferation, apoptosis, senescence and global proteomic profile in human renal adenocarcinoma cells. PLoS One 2018; 13:e0206183. [PMID: 30379886 PMCID: PMC6209291 DOI: 10.1371/journal.pone.0206183] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 10/07/2018] [Indexed: 12/19/2022] Open
Abstract
Chili peppers are an important constituent of many foods and contain medicinally valuable compounds, such as capsaicin and dihydrocapsaicin. As various dietary botanicals have anticancer properties, this study was aimed to examine the effect of Ghost pepper (Bhut Jolokia), one of the hottest chili peppers in the world, on cell proliferation, apoptosis, senescence and the global proteomic profile in human renal cell adenocarcinoma in vitro. 769-P human renal adenocarcinoma cells were cultured on RPMI-1640 media supplemented with fetal bovine serum (10%) and antibiotic-antimycotic solution (1%). Treatment stock solutions were prepared in ethanol. Cell proliferation was tested with phenol red-free media with capsaicin (0-400 μM), dihydrocapsaicin (0-400 μM), capsaicin + dihydrocapsaicin (5:1), and dry Ghost peppers (0-3 g L-1) for 24, 48 and 72 h. Polycaspase and senescence associated-beta-galactosidase (SA-beta-gal) activities were tested with capsaicin (400 μM), dihydrocapsaicin (400 μM), capsaicin (400 μM) + dihydrocapsaicin (80 μM), and ghost pepper (3 g L-1) treatments. Global proteomic profile of cells in control and ghost pepper treatment (3 g L-1) was analyzed after 6 h by a shotgun proteomic approach using tandem mass spectrometry. At 24 h after treatment (24 HAT), relative to control, cell proportion with capsaicin (400 μM), dihydrocapsaicin (400 μM), capsaicin (400 μM) + dihydrocapsaicin (80 μM), and ghost pepper (3 g L-1) treatments was reduced to 36%, 18%, 33% and 20%, respectively, and further reduced at 48 and 72 HAT. All treatments triggered an early polycaspase response. SA-beta-gal activity was normal or suppressed with all treatments. About 68,220 protein isoforms were identified by shotgun proteomic approach. Among these, about 8.2% were significantly affected by ghost pepper. Ghost pepper regulated various proteins involved in intrinsic and extrinsic apoptotic pathways, Ras, Rb/E2F, p53, TGF-beta, WNT-beta catenin, and calcium induced cell death pathways. Ghost pepper also induced changes in proteins related to methylation, acetylation, genome stability, cell cycle check points, carbohydrate, protein and other metabolism and cellular mechanisms. Ghost pepper exhibited antiproliferation activity by inducing apoptosis through a complex network of proteins in human renal cell adenocarcinoma in vitro.
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Affiliation(s)
- Venu Perla
- Gus R. Douglass Land-Grant Institute and Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
| | - Marjan Nadimi
- Gus R. Douglass Land-Grant Institute and Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
| | - Rishi Reddy
- Gus R. Douglass Land-Grant Institute and Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
| | - Gerald R. Hankins
- Gus R. Douglass Land-Grant Institute and Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
| | - Padma Nimmakayala
- Gus R. Douglass Land-Grant Institute and Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
| | - Robert T. Harris
- Gus R. Douglass Land-Grant Institute and Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
| | - Jagan Valluri
- Department of Biological Sciences, One John Marshall Drive, Marshall University, Huntington, West Virginia, United States of America
| | - Cristian Sirbu
- Center for Cancer Research, Charleston Area Medical Center, SE, Charleston, West Virginia, United States of America
| | - Umesh K. Reddy
- Gus R. Douglass Land-Grant Institute and Department of Biology, West Virginia State University, Institute, West Virginia, United States of America
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8
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Hernández-Meza JM, Sampedro JG. Trehalose Mediated Inhibition of Lactate Dehydrogenase from Rabbit Muscle. The Application of Kramers' Theory in Enzyme Catalysis. J Phys Chem B 2018; 122:4309-4317. [PMID: 29595977 DOI: 10.1021/acs.jpcb.8b01656] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Lactate dehydrogenase (LDH) catalyzes the reduction of pyruvate to lactate by using NADH. LDH kinetics has been proposed to be dependent on the dynamics of a loop over the active site. Kramers' theory has been useful in the study of enzyme catalysis dependent on large structural dynamics. In this work, LDH kinetics was studied in the presence of trehalose and at different temperatures. In the absence of trehalose, temperature increase raised exponentially the LDH Vmax and revealed a sigmoid transition of Km toward a low-affinity state similar to protein unfolding. Notably, LDH Vmax diminished when in the presence of trehalose, while pyruvate affinity increased and the temperature-mediated binding site transition was hindered. The effect of trehalose on kcat was viscosity dependent as described by Kramers' theory since Vmax correlated inversely with the viscosity of the medium. As a result, activation energy ( Ea) for pyruvate reduction was dramatically increased by trehalose presence. This work provides experimental evidence that the dynamics of a structural component in LDH is essential for catalysis, i.e., the closing of the loop on the active site. While the trehalose mediated-increased of pyruvate affinity is proposed to be due to the compaction and/or increase of structural order at the binding site.
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Affiliation(s)
- Juan M Hernández-Meza
- Instituto de Física, Universidad Autónoma de San Luis Potosí , Manuel Nava 6, Zona Universitaria , C.P. 78290 San Luis Potosí , SLP , México
| | - José G Sampedro
- Instituto de Física, Universidad Autónoma de San Luis Potosí , Manuel Nava 6, Zona Universitaria , C.P. 78290 San Luis Potosí , SLP , México
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9
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Kaminska K, Czarnecka AM, Khan MI, Fendler W, Klemba A, Krasowski P, Bartnik E, Szczylik C. Effects of cell-cell crosstalk on gene expression patterns in a cell model of renal cell carcinoma lung metastasis. Int J Oncol 2017; 52:768-786. [PMID: 29286165 PMCID: PMC5807041 DOI: 10.3892/ijo.2017.4234] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Accepted: 12/04/2017] [Indexed: 01/28/2023] Open
Abstract
The median survival rate of patients with metastatic renal carcinoma is approximately 10 to 12 months, with up to 50% of patients developing metastases in the lung parenchyma. The molecular basis for metastatic development remains unclear. In the present study, we used renal cell carcinoma (RCC) cells and bronchial epithelial cells, representing metastasis target organ cells, conditioned medium and co-culture models to identify specific gene expression changes responsible for cancer cell viability in a metastatic microenvironment. RCC cell proliferation and migration increased when the culture was supplemented with conditioned medium from lung fibroblasts or pleural epithelial cells. Healthy epithelial cells were, in turn, also stimulated with conditioned medium from RCC cell lines. The mitogen-activated protein kinase (MAPK), interleukin (IL)-6, and phosphatidylinositol 4,5-bisphosphate (PIP2) signaling pathways were identified as deregulated upon cell‑cell interaction. Thus, cell-cell communication may contribute to the development of the metastatic niche. The identified deregulated signaling pathways may be considered as potential therapeutic targets in metastatic renal carcinoma.
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Affiliation(s)
- Katarzyna Kaminska
- Department of Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
| | - Anna M Czarnecka
- Department of Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
| | - Mohammed Imran Khan
- Department of Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
| | - Wojciech Fendler
- Department of Biostatistics and Translational Medicine, Medical University of Lodz, 92‑215 Lodz, Poland
| | - Aleksandra Klemba
- Department of Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
| | - Pawel Krasowski
- Department of Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
| | - Ewa Bartnik
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, 02‑106 Warsaw, Poland
| | - Cezary Szczylik
- Department of Oncology, Military Institute of Medicine, 04‑141 Warsaw, Poland
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10
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Albarede F, Télouk P, Balter V, Bondanese VP, Albalat E, Oger P, Bonaventura P, Miossec P, Fujii T. Medical applications of Cu, Zn, and S isotope effects. Metallomics 2017; 8:1056-1070. [PMID: 27513195 DOI: 10.1039/c5mt00316d] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review examines recent applications of stable copper, zinc and sulfur isotopes to medical cases and notably cancer. The distribution of the natural stable isotopes of a particular element among coexisting molecular species varies as a function of the bond strength, the ionic charge, and the coordination, and it also changes with kinetics. Ab initio calculations show that compounds in which a metal binds to oxygen- (sulfate, phosphate, lactate) and nitrogen-bearing moieties (histidine) favor heavy isotopes, whereas bonds with sulfur (cysteine, methionine) favor light isotopes. Oxidized cations (e.g., Cu(ii)) and low coordination numbers are expected to favor heavy isotopes relative to their reduced counterparts (Cu(i)) and high coordination numbers. Here we discuss the first observations of Cu, Zn, and S isotopic variations, three elements closely related along multiple biological pathways, with emphasis on serum samples of healthy volunteers and of cancer patients. It was found that heavy isotopes of Zn and to an even greater extent Cu are enriched in erythrocytes relative to serum, while the difference is small for sulfur. Isotopic variations related to age and sex are relatively small. The 65Cu/63Cu ratio in the serum of patients with colon, breast, and liver cancer is conspicuously low relative to healthy subjects. The characteristic time over which Cu isotopes may change with disease progression (a few weeks) is consistent with both the turnover time of the element and albumin half-life. A parallel effect on sulfur isotopes is detected in a few un-medicated patients. Copper in liver tumor tissue is isotopically heavy. In contrast, Zn in breast cancer tumors is isotopically lighter than in healthy breast tissue. 66Zn/64Zn is very similar in the serum of cancer patients and in controls. Possible reasons for Cu isotope variations may be related to the cytosolic storage of Cu lactate (Warburg effect), release of intracellular copper from cysteine clusters (metallothionein), or the hepatocellular and biosynthetic dysfunction of the liver. We suggest that Cu isotope metallomics will help evaluate the homeostasis of this element during patient treatment, notably by chelates and blockers of Cu trafficking, and understand the many biochemical pathways in which this element is essential.
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Affiliation(s)
- Francis Albarede
- Ecole Normale Supérieure de Lyon and CNRS UMR 5276, 69007 Lyon, France.
| | - Philippe Télouk
- Ecole Normale Supérieure de Lyon and CNRS UMR 5276, 69007 Lyon, France.
| | - Vincent Balter
- Ecole Normale Supérieure de Lyon and CNRS UMR 5276, 69007 Lyon, France.
| | | | | | - Philippe Oger
- Ecole Normale Supérieure de Lyon and CNRS UMR 5276, 69007 Lyon, France.
| | - Paola Bonaventura
- Department of Immunology and Rheumatology, Immunogenomics and inflammation EA 4130, University of Lyon, Edouard Herriot Hospital, 69437 Lyon, France
| | - Pierre Miossec
- Department of Immunology and Rheumatology, Immunogenomics and inflammation EA 4130, University of Lyon, Edouard Herriot Hospital, 69437 Lyon, France
| | - Toshiyuki Fujii
- Research Reactor Institute, Kyoto University, Osaka 590-0494, Japan
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11
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Dicumarol inhibits PDK1 and targets multiple malignant behaviors of ovarian cancer cells. PLoS One 2017; 12:e0179672. [PMID: 28617852 PMCID: PMC5472302 DOI: 10.1371/journal.pone.0179672] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 06/01/2017] [Indexed: 01/23/2023] Open
Abstract
Pyruvate dehydrogenase kinase 1 (PDK1) is overexpressed in ovarian cancer and thus is a promising anticancer therapeutic target. Our previous work suggests that coumarin compounds are potential inhibitors of PDKs. In this study, we used the ovarian cancer cell line SKOV3 as the model system and examined whether dicumarol (DIC), a coumarin compound, could inhibit ovarian cancer through targeting PDK1. We showed that DIC potently inhibited the kinase activity of PDK1, shifted the glucose metabolism from aerobic glycolysis to oxidative phosphorylation, generated a higher level of reactive oxygen species (ROS), attenuated the mitochondrial membrane potential (MMP), induced apoptosis, and reduced cell viability in vitro. The same phenotypes induced by DIC also were translated in vivo, leading to significant suppression of xenograft growth. This study not only identifies a novel inhibitor for PDK1, but it also reveals novel anticancer mechanisms of DIC and provides a promising anticancer therapy that targets the Warburg effect.
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12
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13
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Abstract
Alterations in the epigenome and metabolism both affect molecular rewiring in cancer cells and facilitate cancer development and progression. However, recent evidence suggests the existence of important bidirectional regulatory mechanisms between metabolic remodelling and the epigenome (specifically methylation and acetylation of histones) in cancer. Most chromatin-modifying enzymes require substrates or cofactors that are intermediates of cell metabolism. Such metabolites, and often the enzymes that produce them, can transfer into the nucleus, directly linking metabolism to nuclear transcription. We discuss how metabolic remodelling can contribute to tumour epigenetic alterations, thereby affecting cancer cell differentiation, proliferation and/or apoptosis, as well as therapeutic responses.
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Affiliation(s)
- Adam Kinnaird
- Department of Medicine, University of Alberta, Edmonton, Alberta, Canada
- Division of Urology, Department of Surgery, University of Alberta, Edmonton, Alberta T6G 2R7, Canada
| | - Steven Zhao
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Kathryn E Wellen
- Department of Cancer Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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Chi MS, Lee CY, Huang SC, Yang KL, Ko HL, Chen YK, Chung CH, Liao KW, Chi KH. Double autophagy modulators reduce 2-deoxyglucose uptake in sarcoma patients. Oncotarget 2016; 6:29808-17. [PMID: 26375670 PMCID: PMC4745764 DOI: 10.18632/oncotarget.5060] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 08/26/2015] [Indexed: 12/11/2022] Open
Abstract
Rationale According to the metabolic symbiosis model, cancer stromal fibroblasts could be hijacked by surrounding cancer cells into a state of autophagy with aerobic glycolysis to help provide recycled nutrients. The purpose of this study was to investigate whether combined treatment with the autophagy inhibitor: hydroxychloroquine (HCQ) and the autophagy inducer: sirolimus (rapamycin, Rapa) would reduce glucose utilization in sarcoma patients. Methods Ten sarcoma patients who failed first-line treatment were enrolled in this study. They were treated with 1 mg of Rapa and 200 mg of HCQ twice daily for two weeks. The standardized uptake values (SUV) from pretreatment and posttreatment [18F]-fluorodeoxyglucose positron emission tomography (FDG PET) scans were reviewed, and changes from the baseline SUVmax were evaluated. Results Based on FDG PET response criteria, six patients had a partial response; three had stable disease, and one had progressive disease. Nevertheless, none of them showed a reduction in tumor volume. The mean SUVmax reduction in the 34 lesions evaluated was − 19.6% (95% CI = −30.1% to −9.1%), while the mean volume change was +16.4% (95% CI = +5.8% to + 27%). Only grade 1 toxicities were observed. Elevated serum levels of lactate dehydrogenase were detected after treatment in most metabolic responders. Conclusions The results of reduced SUVmax without tumor volume reduction after two weeks of Rapa and HCQ treatment may indicate that non-proliferative glycolysis occurred mainly in the cancer associated fibroblast compartment, and decreased glycolytic activity was evident from Rapa + HCQ double autophagy modulator treatment.
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Affiliation(s)
- Mau-Shin Chi
- Department of Radiation Therapy and Oncology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.,Institue of Molecular Medicine and Bioengineering, National Chiao-Tung University, Hsinchu, Taiwan
| | - Cheng-Yen Lee
- Department of Radiation Therapy and Oncology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Su-Chen Huang
- Department of Radiation Therapy and Oncology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Kai-Lin Yang
- Department of Radiation Therapy and Oncology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Hui-Ling Ko
- Department of Radiation Therapy and Oncology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Yen-Kung Chen
- Department of Nuclear Medicine and PET Center, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan
| | - Chen-Han Chung
- Institue of Molecular Medicine and Bioengineering, National Chiao-Tung University, Hsinchu, Taiwan
| | - Kuang-Wen Liao
- Institue of Molecular Medicine and Bioengineering, National Chiao-Tung University, Hsinchu, Taiwan
| | - Kwan-Hwa Chi
- Department of Radiation Therapy and Oncology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.,School of Medicine and Institute of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan
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15
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Bell H, Parkin E. Pyruvate dehydrogenase kinase inhibition: Reversing the Warburg effect in cancer therapy. INTERNATIONAL JOURNAL OF CANCER THERAPY AND ONCOLOGY 2016. [DOI: 10.14319/ijcto.42.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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16
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Koukourakis MI, Kakouratos C, Kalamida D, Bampali Z, Mavropoulou S, Sivridis E, Giatromanolaki A. Hypoxia-inducible proteins HIF1α and lactate dehydrogenase LDH5, key markers of anaerobic metabolism, relate with stem cell markers and poor post-radiotherapy outcome in bladder cancer. Int J Radiat Biol 2016; 92:353-63. [PMID: 27010533 DOI: 10.3109/09553002.2016.1162921] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE To assess whether anaerobic metabolism, proliferation activity and stem cell content are linked with radioresistance in bladder cancer. MATERIALS AND METHODS Tissue sections from 66 patients with invasive transitional cell bladder cancer treated with hypofractionated accelerated radiotherapy, was immunohistochemically analyzed for the Hypoxia-Inducible Factor 1α (HIF1α) and the anaerobic glycolysis enzyme lactate dehydrogenase 5 (LDH5). Proliferation index (Ki-67) and stem-cell marker (cluster of differentiation CD44, aldehyde dehydrogenase ALDH1) expression was also examined. RESULTS Both HIF1α and LDH5 expression were linked with high CD44 stem cell population (p = 0.001 and 0.05, respectively), while high Ki-67 proliferation index was linked with nuclear LDH5 expression (p = 0.03) and high histological grade (p = 0.02). A strong significant association of HIF1α (p = 0.0009) and of LDH5 (p < 0.0001) with poor local relapse free survival (LRFS) was noted, which was also confirmed in multivariate analysis. A significant association with overall survival was also noted. Silencing of lactate dehydrogenase LDHA gene in the human RT112 bladder cancer cell line, or exposure to oxamate (LDH activity inhibitor), resulted in strong radio-sensitization. CONCLUSIONS HIF1α and LDH5 are markers of poor outcome in patients with bladder cancer treated with radiotherapy. Blockage of anaerobic metabolism may prove of importance in clinical radiotherapy.
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Affiliation(s)
- Michael I Koukourakis
- a Department of Radiotherapy/Oncology , Democritus University of Thrace, and University General Hospital of Alexandroupolis , Alexandroupolis , Greece
| | - Christos Kakouratos
- a Department of Radiotherapy/Oncology , Democritus University of Thrace, and University General Hospital of Alexandroupolis , Alexandroupolis , Greece
| | - Dimitra Kalamida
- a Department of Radiotherapy/Oncology , Democritus University of Thrace, and University General Hospital of Alexandroupolis , Alexandroupolis , Greece
| | - Zoi Bampali
- a Department of Radiotherapy/Oncology , Democritus University of Thrace, and University General Hospital of Alexandroupolis , Alexandroupolis , Greece
| | | | - Efthimios Sivridis
- b Department of Pathology , Democritus University of Thrace, and University General Hospital of Alexandroupolis , Alexandroupolis , Greece
| | - Alexandra Giatromanolaki
- b Department of Pathology , Democritus University of Thrace, and University General Hospital of Alexandroupolis , Alexandroupolis , Greece
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Computational Study on New Natural Compound Inhibitors of Pyruvate Dehydrogenase Kinases. Int J Mol Sci 2016; 17:340. [PMID: 26959013 PMCID: PMC4813202 DOI: 10.3390/ijms17030340] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 02/27/2016] [Accepted: 03/01/2016] [Indexed: 01/04/2023] Open
Abstract
Pyruvate dehydrogenase kinases (PDKs) are key enzymes in glucose metabolism, negatively regulating pyruvate dehyrogenase complex (PDC) activity through phosphorylation. Inhibiting PDKs could upregulate PDC activity and drive cells into more aerobic metabolism. Therefore, PDKs are potential targets for metabolism related diseases, such as cancers and diabetes. In this study, a series of computer-aided virtual screening techniques were utilized to discover potential inhibitors of PDKs. Structure-based screening using Libdock was carried out following by ADME (adsorption, distribution, metabolism, excretion) and toxicity prediction. Molecular docking was used to analyze the binding mechanism between these compounds and PDKs. Molecular dynamic simulation was utilized to confirm the stability of potential compound binding. From the computational results, two novel natural coumarins compounds (ZINC12296427 and ZINC12389251) from the ZINC database were found binding to PDKs with favorable interaction energy and predicted to be non-toxic. Our study provide valuable information of PDK-coumarins binding mechanisms in PDK inhibitor-based drug discovery.
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18
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Metabolic Modulation of Clear-cell Renal Cell Carcinoma with Dichloroacetate, an Inhibitor of Pyruvate Dehydrogenase Kinase. Eur Urol 2016; 69:734-744. [PMID: 26433571 DOI: 10.1016/j.eururo.2015.09.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 09/10/2015] [Indexed: 12/21/2022]
Abstract
BACKGROUND Clear-cell renal cell carcinoma (ccRCC) exhibits suppressed mitochondrial function and preferential use of glycolysis even in normoxia, promoting proliferation and suppressing apoptosis. ccRCC resistance to therapy is driven by constitutive hypoxia-inducible factor (HIF) expression due to genetic loss of von Hippel-Lindau factor. In addition to promoting angiogenesis, HIF suppresses mitochondrial function by inducing pyruvate dehydrogenase kinase (PDK), a gatekeeping enzyme for mitochondrial glucose oxidation. OBJECTIVE To reverse mitochondrial suppression of ccRCC using the PDK inhibitor dichloroacetate (DCA). DESIGN, SETTING, AND PARTICIPANTS Radical nephrectomy specimens from patients with ccRCC were assessed for PDK expression. The 786-O ccRCC line and two animal models (chicken in ovo and murine xenografts) were used for mechanistic studies. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS Mitochondrial function, proliferation, apoptosis, HIF transcriptional activity, angiogenesis, and tumor size were measured in vitro and in vivo. Independent-sample t-tests and analysis of variance were used for statistical analyses. RESULTS PDK was elevated in 786-O cells and in ccRCC compared to normal kidney tissue from the same patient. DCA reactivated mitochondrial function (increased respiration, Krebs cycle metabolites such as α-ketoglutarate [cofactor of factor inhibiting HIF], and mitochondrial reactive oxygen species), increased p53 activity and apoptosis, and decreased proliferation in 786-O cells. DCA reduced HIF transcriptional activity in an FIH-dependent manner, inhibiting angiogenesis in vitro. DCA reduced tumor size and angiogenesis in vivo in both animal models. CONCLUSIONS DCA can reverse the mitochondrial suppression of ccRCC and decrease HIF transcriptional activity, bypassing its constitutive expression. Its previous clinical use in humans makes it an attractive candidate for translation to ccRCC patients. PATIENT SUMMARY We show that an energy-boosting drug decreases tumor growth and tumor blood vessels in animals carrying human kidney cancer cells. This generic drug has been used in patients for other conditions and thus could be tested in kidney cancer that remains incurable.
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Dörsam B, Fahrer J. The disulfide compound α-lipoic acid and its derivatives: A novel class of anticancer agents targeting mitochondria. Cancer Lett 2015; 371:12-9. [PMID: 26604131 DOI: 10.1016/j.canlet.2015.11.019] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 11/11/2015] [Accepted: 11/12/2015] [Indexed: 01/20/2023]
Abstract
The endogenous disulfide α-lipoic acid (LA) is an essential mitochondrial co-factor. In addition, LA and its reduced counterpart dihydro lipoic acid form a potent redox couple with antioxidative functions, for which it is used as dietary supplement and therapeutic. Recently, it has gained attention due to its cytotoxic effects in cancer cells, which is the key aspect of this review. We initially recapitulate the dietary occurrence, gastrointestinal absorption and pharmacokinetics of LA, illustrating its diverse antioxidative mechanisms. We then focus on its mode of action in cancer cells, in which it triggers primarily the mitochondrial pathway of apoptosis, whereas non-transformed primary cells are hardly affected. Furthermore, LA impairs oncogenic signaling and displays anti-metastatic potential. Novel LA derivatives such as CPI-613, which target mitochondrial energy metabolism, are described and recent pre-clinical studies are presented, which demonstrate that LA and its derivatives exert antitumor activity in vivo. Finally, we highlight clinical studies currently performed with the LA analog CPI-613. In summary, LA and its derivatives are promising candidates to complement the arsenal of established anticancer drugs due to their mitochondria-targeted mode of action and non-genotoxic properties.
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Affiliation(s)
- Bastian Dörsam
- Department of Toxicology, University Medical Center Mainz, Obere Zahlbacher Strasse 67, D-55131 Mainz, Germany
| | - Jörg Fahrer
- Department of Toxicology, University Medical Center Mainz, Obere Zahlbacher Strasse 67, D-55131 Mainz, Germany.
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20
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Saunier E, Benelli C, Bortoli S. The pyruvate dehydrogenase complex in cancer: An old metabolic gatekeeper regulated by new pathways and pharmacological agents. Int J Cancer 2015; 138:809-17. [PMID: 25868605 DOI: 10.1002/ijc.29564] [Citation(s) in RCA: 156] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 03/16/2015] [Accepted: 04/07/2015] [Indexed: 01/02/2023]
Abstract
Cancer cells exhibit an altered metabolism which is characterized by a preference for aerobic glycolysis more than mitochondrial oxidation of pyruvate. This provides anabolic support and selective growth advantage for cancer cells. Recently, a new concept has arisen suggesting that these metabolic changes may be due, in part, to an attenuated mitochondrial function which results from the inhibition of the pyruvate dehydrogenase complex (PDC). This mitochondrial complex links glycolysis to the Krebs cycle and the current understanding of its regulation involves the cyclic phosphorylation and dephosphorylation by specific pyruvate dehydrogenase kinases (PDKs) and pyruvate dehydrogenase phosphatases (PDPs).
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Affiliation(s)
- Elise Saunier
- INSERM UMR-S 1124, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Chantal Benelli
- INSERM UMR-S 1124, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Sylvie Bortoli
- INSERM UMR-S 1124, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
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The role of Merkel cell polyomavirus and other human polyomaviruses in emerging hallmarks of cancer. Viruses 2015; 7:1871-901. [PMID: 25866902 PMCID: PMC4411681 DOI: 10.3390/v7041871] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 04/01/2015] [Accepted: 04/07/2015] [Indexed: 12/24/2022] Open
Abstract
Polyomaviruses are non-enveloped, dsDNA viruses that are common in mammals, including humans. All polyomaviruses encode the large T-antigen and small t-antigen proteins that share conserved functional domains, comprising binding motifs for the tumor suppressors pRb and p53, and for protein phosphatase 2A, respectively. At present, 13 different human polyomaviruses are known, and for some of them their large T-antigen and small t-antigen have been shown to possess oncogenic properties in cell culture and animal models, while similar functions are assumed for the large T- and small t-antigen of other human polyomaviruses. However, so far the Merkel cell polyomavirus seems to be the only human polyomavirus associated with cancer. The large T- and small t-antigen exert their tumorigenic effects through classical hallmarks of cancer: inhibiting tumor suppressors, activating tumor promoters, preventing apoptosis, inducing angiogenesis and stimulating metastasis. This review elaborates on the putative roles of human polyomaviruses in some of the emerging hallmarks of cancer. The reciprocal interactions between human polyomaviruses and the immune system response are discussed, a plausible role of polyomavirus-encoded and polyomavirus-induced microRNA in cancer is described, and the effect of polyomaviruses on energy homeostasis and exosomes is explored. Therapeutic strategies against these emerging hallmarks of cancer are also suggested.
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