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Wang R, Hussain A, Guo QQ, Jin XW, Wang MM. Oxygen and Iron Availability Shapes Metabolic Adaptations of Cancer Cells. World J Oncol 2024; 15:28-37. [PMID: 38274726 PMCID: PMC10807922 DOI: 10.14740/wjon1739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 11/23/2023] [Indexed: 01/27/2024] Open
Abstract
The dynamic changes between glycolysis and oxidative phosphorylation (OXPHOS) for adenosine triphosphate (ATP) output, along with glucose, glutamine, and fatty acid utilization, etc., lead to the maintenance and selection of growth advantageous to tumor cell subgroups in an environment of iron starvation and hypoxia. Iron plays an important role in the three major biochemical reactions in nature: photosynthesis, nitrogen fixation, and oxidative respiration, which all require the participation of iron-sulfur proteins, such as ferredoxin, cytochrome b, and the complex I, II, III in the electron transport chain, respectively. Abnormal iron-sulfur cluster synthesis process or hypoxia will directly affect the function of mitochondrial electron transfer and mitochondrial OXPHOS. More research results have indicated that iron metabolism, oxygen availability and hypoxia-inducible factor mutually regulate the shift between glycolysis and OXPHOS. In this article, we make a perspective review to provide novel opinions of the regulation of glycolysis and OXPHOS in tumor cells.
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Affiliation(s)
- Rui Wang
- Department of Oncology, Suqian Affiliated Hospital of Xuzhou Medical University, Suqian City, China
- Department of Hematology, the Second Affiliated Hospital of Soochow University, Su Zhou City, China
| | - Aashiq Hussain
- Cancer Science Institute of Singapore, National University of Singapore, 119077 Singapore
| | - Quan Quan Guo
- Department of Oncology, Suqian Affiliated Hospital of Xuzhou Medical University, Suqian City, China
- Department of Radiology, the Second Affiliated Hospital of Soochow University, Su Zhou City, China
| | - Xiao Wei Jin
- Department of Oncology, Suqian Affiliated Hospital of Xuzhou Medical University, Suqian City, China
| | - Miao Miao Wang
- Department of General Surgery, Suqian Affiliated Hospital of Xuzhou Medical University, Suqian City, China
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Javed Z, Shin DH, Pan W, White SR, Kim YS, Elhaw AT, Kamlapurkar S, Cheng YY, Benson JC, Abdelnaby AE, Phaëton R, Wang HG, Yang S, Sullivan ML, St.Croix CM, Watkins SC, Mullett SJ, Gelhaus SL, Lee N, Coffman LG, Aird KM, Trebak M, Mythreye K, Walter V, Hempel N. Alternative splice variants of the mitochondrial fission protein DNM1L/Drp1 regulate mitochondrial dynamics and tumor progression in ovarian cancer. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.09.20.558501. [PMID: 37790404 PMCID: PMC10542115 DOI: 10.1101/2023.09.20.558501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Aberrant mitochondrial fission/fusion dynamics have been reported in cancer cells. While post translational modifications are known regulators of the mitochondrial fission/fusion machinery, we show that alternative splice variants of the fission protein Drp1 (DNM1L) have specific and unique roles in cancer, adding to the complexity of mitochondrial fission/fusion regulation in tumor cells. Ovarian cancer specimens express an alternative splice transcript variant of Drp1 lacking exon 16 of the variable domain, and high expression of this splice variant relative to other transcripts is associated with poor patient outcome. Unlike the full-length variant, expression of Drp1 lacking exon 16 leads to decreased association of Drp1 to mitochondrial fission sites, more fused mitochondrial networks, enhanced respiration, and TCA cycle metabolites, and is associated with a more metastatic phenotype in vitro and in vivo. These pro-tumorigenic effects can also be inhibited by specific siRNA-mediated inhibition of the endogenously expressed transcript lacking exon 16. Moreover, lack of exon 16 abrogates mitochondrial fission in response to pro-apoptotic stimuli and leads to decreased sensitivity to chemotherapeutics. These data emphasize the significance of the pathophysiological consequences of Drp1 alternative splicing and divergent functions of Drp1 splice variants, and strongly warrant consideration of Drp1 splicing in future studies.
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Affiliation(s)
- Zaineb Javed
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, PA, USA
- Department of Medicine, Division of Hematology/Oncology, University of Pittsburgh School of Medicine, PA, USA
- Department of Pharmacology, College of Medicine, Pennsylvania State University, Hershey, PA, USA
| | - Dong Hui Shin
- Department of Pharmacology, College of Medicine, Pennsylvania State University, Hershey, PA, USA
| | - Weihua Pan
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, PA, USA
- Department of Medicine, Division of Hematology/Oncology, University of Pittsburgh School of Medicine, PA, USA
| | - Sierra R. White
- Department of Medicine, Division of Hematology/Oncology, University of Pittsburgh School of Medicine, PA, USA
- Vascular Medicine Institute (VMI), University of Pittsburgh School of Medicine, PA, USA
| | - Yeon Soo Kim
- Department of Pharmacology, College of Medicine, Pennsylvania State University, Hershey, PA, USA
| | - Amal Taher Elhaw
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, PA, USA
- Department of Medicine, Division of Hematology/Oncology, University of Pittsburgh School of Medicine, PA, USA
- Department of Pharmacology, College of Medicine, Pennsylvania State University, Hershey, PA, USA
| | - Shriya Kamlapurkar
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, PA, USA
- Department of Medicine, Division of Hematology/Oncology, University of Pittsburgh School of Medicine, PA, USA
| | - Ya-Yun Cheng
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, PA, USA
- Department of Medicine, Division of Hematology/Oncology, University of Pittsburgh School of Medicine, PA, USA
| | - J Cory Benson
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, PA, USA
| | - Ahmed Emam Abdelnaby
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, PA, USA
| | - Rébécca Phaëton
- Department of Obstetrics & Gynecology, College of Medicine, Pennsylvania State University, Hershey, PA, USA
| | - Hong-Gang Wang
- Department of Pediatrics, College of Medicine, Pennsylvania State University, Hershey, PA, USA
| | - Shengyu Yang
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, PA, USA; Health Sciences Mass Spectrometry Core, University of Pittsburgh, PA, USA
| | - Mara L.G. Sullivan
- Center for Biologic Imaging, University of Pittsburgh School of Medicine, PA, USA; Division of Pharmacology, Chemistry and Biochemistry, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Claudette M. St.Croix
- Center for Biologic Imaging, University of Pittsburgh School of Medicine, PA, USA; Division of Pharmacology, Chemistry and Biochemistry, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Simon C. Watkins
- Center for Biologic Imaging, University of Pittsburgh School of Medicine, PA, USA; Division of Pharmacology, Chemistry and Biochemistry, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Steven J. Mullett
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, PA, USA
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, PA, USA; Health Sciences Mass Spectrometry Core, University of Pittsburgh, PA, USA
| | - Stacy L. Gelhaus
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, PA, USA
- Department of Cellular and Molecular Physiology, College of Medicine, Pennsylvania State University, Hershey, PA, USA; Health Sciences Mass Spectrometry Core, University of Pittsburgh, PA, USA
| | - Nam Lee
- Center for Biologic Imaging, University of Pittsburgh School of Medicine, PA, USA; Division of Pharmacology, Chemistry and Biochemistry, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Lan G. Coffman
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, PA, USA
- Department of Medicine, Division of Hematology/Oncology, University of Pittsburgh School of Medicine, PA, USA
| | - Katherine M. Aird
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, PA, USA
- Department of Pharmacology, College of Medicine, Pennsylvania State University, Hershey, PA, USA
| | - Mohamed Trebak
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, PA, USA
- Department of Pharmacology, College of Medicine, Pennsylvania State University, Hershey, PA, USA
- Vascular Medicine Institute (VMI), University of Pittsburgh School of Medicine, PA, USA
- Vascular Medicine Institute (VMI), University of Pittsburgh School of Medicine, PA, USA
| | - Karthikeyan Mythreye
- Department of Pathology and O’Neal Comprehensive Cancer Center, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Vonn Walter
- Department of Public Health Sciences, Division of Biostatistics and Bioinformatics and Department of Biochemistry and Molecular Biology, College of Medicine, Pennsylvania State University, Hershey, PA, USA
| | - Nadine Hempel
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, PA, USA
- Department of Medicine, Division of Hematology/Oncology, University of Pittsburgh School of Medicine, PA, USA
- Vascular Medicine Institute (VMI), University of Pittsburgh School of Medicine, PA, USA
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3
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Bosso M, Haddad D, Al Madhoun A, Al-Mulla F. Targeting the Metabolic Paradigms in Cancer and Diabetes. Biomedicines 2024; 12:211. [PMID: 38255314 PMCID: PMC10813379 DOI: 10.3390/biomedicines12010211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/09/2024] [Accepted: 01/11/2024] [Indexed: 01/24/2024] Open
Abstract
Dysregulated metabolic dynamics are evident in both cancer and diabetes, with metabolic alterations representing a facet of the myriad changes observed in these conditions. This review delves into the commonalities in metabolism between cancer and type 2 diabetes (T2D), focusing specifically on the contrasting roles of oxidative phosphorylation (OXPHOS) and glycolysis as primary energy-generating pathways within cells. Building on earlier research, we explore how a shift towards one pathway over the other serves as a foundational aspect in the development of cancer and T2D. Unlike previous reviews, we posit that this shift may occur in seemingly opposing yet complementary directions, akin to the Yin and Yang concept. These metabolic fluctuations reveal an intricate network of underlying defective signaling pathways, orchestrating the pathogenesis and progression of each disease. The Warburg phenomenon, characterized by the prevalence of aerobic glycolysis over minimal to no OXPHOS, emerges as the predominant metabolic phenotype in cancer. Conversely, in T2D, the prevailing metabolic paradigm has traditionally been perceived in terms of discrete irregularities rather than an OXPHOS-to-glycolysis shift. Throughout T2D pathogenesis, OXPHOS remains consistently heightened due to chronic hyperglycemia or hyperinsulinemia. In advanced insulin resistance and T2D, the metabolic landscape becomes more complex, featuring differential tissue-specific alterations that affect OXPHOS. Recent findings suggest that addressing the metabolic imbalance in both cancer and diabetes could offer an effective treatment strategy. Numerous pharmaceutical and nutritional modalities exhibiting therapeutic effects in both conditions ultimately modulate the OXPHOS-glycolysis axis. Noteworthy nutritional adjuncts, such as alpha-lipoic acid, flavonoids, and glutamine, demonstrate the ability to reprogram metabolism, exerting anti-tumor and anti-diabetic effects. Similarly, pharmacological agents like metformin exhibit therapeutic efficacy in both T2D and cancer. This review discusses the molecular mechanisms underlying these metabolic shifts and explores promising therapeutic strategies aimed at reversing the metabolic imbalance in both disease scenarios.
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Affiliation(s)
- Mira Bosso
- Department of Pathology, Faculty of Medicine, Health Science Center, Kuwait University, Safat 13110, Kuwait
| | - Dania Haddad
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, Dasman 15462, Kuwait; (D.H.); (A.A.M.)
| | - Ashraf Al Madhoun
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, Dasman 15462, Kuwait; (D.H.); (A.A.M.)
- Department of Animal and Imaging Core Facilities, Dasman Diabetes Institute, Dasman 15462, Kuwait
| | - Fahd Al-Mulla
- Department of Pathology, Faculty of Medicine, Health Science Center, Kuwait University, Safat 13110, Kuwait
- Department of Genetics and Bioinformatics, Dasman Diabetes Institute, Dasman 15462, Kuwait; (D.H.); (A.A.M.)
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Kobayashi H. Recent advances in understanding the metabolic plasticity of ovarian cancer: A systematic review. Heliyon 2022; 8:e11487. [PMID: 36406733 PMCID: PMC9668530 DOI: 10.1016/j.heliyon.2022.e11487] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/03/2022] [Accepted: 11/04/2022] [Indexed: 11/13/2022] Open
Abstract
Epithelial ovarian cancer (EOC) is a gynecologic malignancy with a poor prognosis due to resistance to first-line chemotherapeutic agents. Some cancer cells are primarily dependent on glycolysis, but others favor mitochondrial oxidative phosphorylation (OXPHOS) over glycolysis. Changes in metabolic reprogramming have been reported to be involved in cancer cell survival. In this review, we summarize the metabolic profiles (e.g., metabolic heterogeneity, plasticity, and reprogramming) and adaptation to the dynamic tumor microenvironment and discuss potential novel therapeutic strategies. A literature search was performed between January 2000 and March 2022 in the PubMed and Google Scholar databases using a combination of specific terms. Ovarian cancer cells, including cancer stem cells, depend on glycolysis, OXPHOS, or both for survival. Several environmental stresses, such as nutrient starvation or glucose deprivation, hypoxic stress, acidification, and excessive reactive oxygen species (ROS) generation, reprogram the metabolic pathways to adapt. The interaction between tumors and adjacent stromal cells allows cancer cells to enhance mitochondrial energy metabolism. The metabolic reprogramming varies depending on genomic and epigenetic alterations of metabolism-related genes and the metabolic environment. Developing accurate and non-invasive methods for early identification of metabolic alterations could facilitate optimal cancer diagnosis and treatment. Cancer metabolism research has entered an exciting era where novel strategies targeting metabolic profiling will become more innovative.
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Wang L, Cybula M, Rostworowska M, Wang L, Mucha P, Bulicz M, Bieniasz M. Upregulation of Succinate Dehydrogenase (SDHA) Contributes to Enhanced Bioenergetics of Ovarian Cancer Cells and Higher Sensitivity to Anti-Metabolic Agent Shikonin. Cancers (Basel) 2022; 14:5097. [PMID: 36291881 PMCID: PMC9599980 DOI: 10.3390/cancers14205097] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 10/07/2022] [Accepted: 10/14/2022] [Indexed: 11/29/2022] Open
Abstract
We discovered that the overexpression of mitochondrial enzyme succinate dehydrogenase (SDHA) is particularly prevalent in ovarian carcinoma and promotes highly metabolically active phenotype. Succinate dehydrogenase deficiency has been previously studied in some rare disorders. However, the role of SDHA upregulation and its impact on ovarian cancer metabolism has never been investigated, emphasizing the need for further research. We investigated the functional consequences of SDHA overexpression in ovarian cancer. Using proteomics approaches and biological assays, we interrogated protein content of metabolic pathways, cell proliferation, anchorage-independent growth, mitochondrial respiration, glycolytic function, and ATP production rates in those cells. Lastly, we performed a drug screening to identify agents specifically targeting the SDHA overexpressing tumor cells. We showed that SDHA overexpressing cells are characterized by enhanced energy metabolism, relying on both glycolysis and oxidative phosphorylation to meet their energy needs. In addition, SDHA-high phenotype was associated with cell vulnerability to glucose and glutamine deprivation, which led to a substantial reduction of ATP yield. We also identified an anti-metabolic compound shikonin with a potent efficacy against SDHA overexpressing ovarian cancer cells. Our data underline the unappreciated role of SDHA in reprogramming of ovarian cancer metabolism, which represents a new opportunity for therapeutic intervention.
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Affiliation(s)
| | | | | | | | | | | | - Magdalena Bieniasz
- Aging and Metabolism Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
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Decreased Levels of GSH Are Associated with Platinum Resistance in High-Grade Serous Ovarian Cancer. Antioxidants (Basel) 2022; 11:antiox11081544. [PMID: 36009263 PMCID: PMC9404763 DOI: 10.3390/antiox11081544] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/07/2022] [Accepted: 08/09/2022] [Indexed: 12/12/2022] Open
Abstract
High-grade serous ovarian cancer (HGSOC) is the most common and aggressive OC histotype. Although initially sensitive to standard platinum-based chemotherapy, most HGSOC patients relapse and become chemoresistant. We have previously demonstrated that platinum resistance is driven by a metabolic shift toward oxidative phosphorylation via activation of an inflammatory response, accompanied by reduced cholesterol biosynthesis and increased uptake of exogenous cholesterol. To better understand metabolic remodeling in OC, herein we performed an untargeted metabolomic analysis, which surprisingly showed decreased reduced glutathione (GSH) levels in resistant cells. Accordingly, we found reduced levels of enzymes involved in GSH synthesis and recycling, and compensatory increased expression of thioredoxin reductase. Cisplatin treatment caused an increase of reduced GSH, possibly due to direct binding hindering its oxidation, and consequent accumulation of reactive oxygen species. Notably, expression of the cysteine-glutamate antiporter xCT, which is crucial for GSH synthesis, directly correlates with post-progression survival of HGSOC patients, and is significantly reduced in patients not responding to platinum-based therapy. Overall, our data suggest that cisplatin treatment could positively select cancer cells which are independent from GSH for the maintenance of redox balance, and thus less sensitive to cisplatin-induced oxidative stress, opening new scenarios for the GSH pathway as a therapeutic target in HGSOC.
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A novel Gboxin analog induces OXPHOS inhibition and mitochondrial dysfunction-mediated apoptosis in diffuse large B-cell lymphoma. Bioorg Chem 2022; 127:106019. [PMID: 35849895 DOI: 10.1016/j.bioorg.2022.106019] [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: 04/20/2022] [Revised: 06/07/2022] [Accepted: 07/07/2022] [Indexed: 11/23/2022]
Abstract
Diffuse large B-cell lymphoma (DLBCL) is an aggressive B-cell non-Hodgkin's lymphoma. Currently, moderate efficacy and limitations of approved drugs still exist, and it is necessary to develop newer and more effective drugs. Gboxin is a promising inhibitor of OXPHOS, which specifically inhibits the growth of many kinds of cancer cell lines. In the present study, 21 Gboxin analogs incorporating amide and ester moieties were designed and synthesized. Preliminary screening results show that 5d also has specific selectivity for cancer cells, particularly on the DLBCL cells, which is weaker than that of Gboxin but still good. Thus, the effect and underlying mechanism of 5d on DLBCL cells were further studied. The results showed that 5d exhibits potent proliferation inhibition and cell cycle arrest effects, and its IC50 to DLBCL cells is below 1 µM. In addition, 5d induces apoptosis of DLBCL cells in a time- and dose-dependent manner, and this effect is stronger than that of Gboxin and VP16. Mechanistically, 5d plays its role mainly through the stimulation of metabolic stress in DLBCL cell lines, which induces OXPHOS inhibition, inflammation, DNA damage and mitochondrial dysfunction. These data suggest that 5d has potential as a candidate agent for DLBCL alternative drug development.
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Qian L, Li Y, Cao Y, Meng G, Peng J, Li H, Wang Y, Xu T, Zhang L, Sun B, Li B, Yu D. Pan-Cancer Analysis of Glycolytic and Ketone Bodies Metabolic Genes: Implications for Response to Ketogenic Dietary Therapy. Front Oncol 2021; 11:689068. [PMID: 34692477 PMCID: PMC8529115 DOI: 10.3389/fonc.2021.689068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 09/21/2021] [Indexed: 01/17/2023] Open
Abstract
Background The Warburg effect, also termed "aerobic glycolysis", is one of the most remarkable and ubiquitous metabolic characteristics exhibited by cancer cells, representing a potential vulnerability that might be targeted for tumor therapy. Ketogenic diets (KDs), composed of high-fat, moderate-protein and low carbohydrates, are aimed at targeting the Warburg effect for cancer treatment, which have recently gained considerable attention. However, the efficiency of KDs was inconsistent, and the genotypic contribution is still largely unknown. Methods The bulk RNA-seq data from The Cancer Genome Atlas (TCGA), single cell RNA sequencing (scRNA-seq), and microarray data from Gene Expression Omnibus (GEO) and Cancer Cell Line Encyclopedia (CCLE) were collected. A joint analysis of glycolysis and ketone bodies metabolism (KBM) pathway was performed across over 10,000 tumor samples and nearly 1,000 cancer cell lines. A series of bioinformatic approaches were combined to identify a metabolic subtype that may predict the response to ketogenic dietary therapy (KDT). Mouse xenografts were established to validate the predictive utility of our subtypes in response to KDT. Results We first provided a system-level view of the expression pattern and prognosis of the signature genes from glycolysis and KBM pathway across 33 cancer types. Analysis by joint stratification of glycolysis and KBM revealed four metabolic subtypes, which correlated extensively but diversely with clinical outcomes across cancers. The glycolytic subtypes may be driven by TP53 mutations, whereas the KB-metabolic subtypes may be mediated by CTNNB1 (β-catenin) mutations. The glycolytic subtypes may have a better response to KDs compared to the other three subtypes. We preliminarily confirmed the idea by literature review and further performed a proof-of-concept experiment to validate the predictive value of the metabolic subtype in liver cancer xenografts. Conclusions Our findings identified a metabolic subtype based on glycolysis and KBM that may serve as a promising biomarker to predict the clinical outcomes and therapeutic responses to KDT.
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Affiliation(s)
- Liyuan Qian
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yunzheng Li
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yajuan Cao
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Gang Meng
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Jin Peng
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Huan Li
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Ye Wang
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Tiancheng Xu
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Laizhu Zhang
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Beicheng Sun
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Binghua Li
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Decai Yu
- Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
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Hu B, Li H, Zhang X. A Balanced Act: The Effects of GH-GHR-IGF1 Axis on Mitochondrial Function. Front Cell Dev Biol 2021; 9:630248. [PMID: 33816476 PMCID: PMC8012549 DOI: 10.3389/fcell.2021.630248] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 02/16/2021] [Indexed: 12/13/2022] Open
Abstract
Mitochondrial function is multifaceted in response to cellular energy homeostasis and metabolism, with the generation of adenosine triphosphate (ATP) through the oxidative phosphorylation (OXPHOS) being one of their main functions. Selective elimination of mitochondria by mitophagy, in conjunction with mitochondrial biogenesis, regulates mitochondrial function that is required to meet metabolic demand or stress response. Growth hormone (GH) binds to the GH receptor (GHR) and induces the JAK2/STAT5 pathway to activate the synthesis of insulin-like growth factor 1 (IGF1). The GH–GHR–IGF1 axis has been recognized to play significant roles in somatic growth, including cell proliferation, differentiation, division, and survival. In this review, we describe recent discoveries providing evidence for the contribution of the GH–GHR–IGF1 axis on mitochondrial biogenesis, mitophagy (or autophagy), and mitochondrial function under multiple physiological conditions. This may further improve our understanding of the effects of the GH–GHR–IGF1 axis on mitochondrial function, which may be controlled by the delicate balance between mitochondrial biogenesis and mitophagy. Specifically, we also highlight the challenges that remain in this field.
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Affiliation(s)
- Bowen Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China.,Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou, China
| | - Hongmei Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China.,Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou, China
| | - Xiquan Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou, China.,Guangdong Provincial Key Lab of AgroAnimal Genomics and Molecular Breeding, Key Lab of Chicken Genetics, Breeding and Reproduction, Ministry of Agriculture, Guangzhou, China
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10
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Shuvalov O, Daks A, Fedorova O, Petukhov A, Barlev N. Linking Metabolic Reprogramming, Plasticity and Tumor Progression. Cancers (Basel) 2021; 13:cancers13040762. [PMID: 33673109 PMCID: PMC7917602 DOI: 10.3390/cancers13040762] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Revised: 02/03/2021] [Accepted: 02/07/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary In the present review, we discuss the role of metabolic reprogramming which occurs in malignant cells. The process of metabolic reprogramming is also known as one of the “hallmarks of cancer”. Due to several reasons, including the origin of cancer, tumor microenvironment, and the tumor progression stage, metabolic reprogramming can be heterogeneous and dynamic. In this review, we provide evidence that the usage of metabolic drugs is a promising approach to treat cancer. However, because these drugs can damage not only malignant cells but also normal rapidly dividing cells, it is important to understand the exact metabolic changes which are elicited by particular drivers in concrete tissue and are specific for each stage of cancer development, including metastases. Finally, the review highlights new promising targets for the development of new metabolic drugs. Abstract The specific molecular features of cancer cells that distinguish them from the normal ones are denoted as “hallmarks of cancer”. One of the critical hallmarks of cancer is an altered metabolism which provides tumor cells with energy and structural resources necessary for rapid proliferation. The key feature of a cancer-reprogrammed metabolism is its plasticity, allowing cancer cells to better adapt to various conditions and to oppose different therapies. Furthermore, the alterations of metabolic pathways in malignant cells are heterogeneous and are defined by several factors including the tissue of origin, driving mutations, and microenvironment. In the present review, we discuss the key features of metabolic reprogramming and plasticity associated with different stages of tumor, from primary tumors to metastases. We also provide evidence of the successful usage of metabolic drugs in anticancer therapy. Finally, we highlight new promising targets for the development of new metabolic drugs.
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Affiliation(s)
- Oleg Shuvalov
- Institute of Cytology RAS, 194064 St-Petersburg, Russia; (O.S.); (A.D.); (O.F.); (A.P.)
| | - Alexandra Daks
- Institute of Cytology RAS, 194064 St-Petersburg, Russia; (O.S.); (A.D.); (O.F.); (A.P.)
| | - Olga Fedorova
- Institute of Cytology RAS, 194064 St-Petersburg, Russia; (O.S.); (A.D.); (O.F.); (A.P.)
| | - Alexey Petukhov
- Institute of Cytology RAS, 194064 St-Petersburg, Russia; (O.S.); (A.D.); (O.F.); (A.P.)
- Almazov National Medical Research Center, 197341 St-Petersburg, Russia
| | - Nickolai Barlev
- Institute of Cytology RAS, 194064 St-Petersburg, Russia; (O.S.); (A.D.); (O.F.); (A.P.)
- MIPT, 141701 Dolgoprudny, Moscow Region, Russia
- Orekhovich IBMC, 119435 Moscow, Russia
- Correspondence: ; Tel.: +7-812-297-4519
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Kumar PR, Moore JA, Bowles KM, Rushworth SA, Moncrieff MD. Mitochondrial oxidative phosphorylation in cutaneous melanoma. Br J Cancer 2021; 124:115-123. [PMID: 33204029 PMCID: PMC7782830 DOI: 10.1038/s41416-020-01159-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 12/14/2022] Open
Abstract
The Warburg effect in tumour cells is associated with the upregulation of glycolysis to generate ATP, even under normoxic conditions and the presence of fully functioning mitochondria. However, scientific advances made over the past 15 years have reformed this perspective, demonstrating the importance of oxidative phosphorylation (OXPHOS) as well as glycolysis in malignant cells. The metabolic phenotypes in melanoma display heterogeneic dynamism (metabolic plasticity) between glycolysis and OXPHOS, conferring a survival advantage to adapt to harsh conditions and pathways of chemoresistance. Furthermore, the simultaneous upregulation of both OXPHOS and glycolysis (metabolic symbiosis) has been shown to be vital for melanoma progression. The tumour microenvironment (TME) has an essential supporting role in promoting progression, invasion and metastasis of melanoma. Mesenchymal stromal cells (MSCs) in the TME show a symbiotic relationship with melanoma, protecting tumour cells from apoptosis and conferring chemoresistance. With the significant role of OXPHOS in metabolic plasticity and symbiosis, our review outlines how mitochondrial transfer from MSCs to melanoma tumour cells plays a key role in melanoma progression and is the mechanism by which melanoma cells regain OXPHOS capacity even in the presence of mitochondrial mutations. The studies outlined in this review indicate that targeting mitochondrial trafficking is a potential novel therapeutic approach for this highly refractory disease.
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Affiliation(s)
- Prakrit R Kumar
- Bob Champion Research and Education Building, Norwich Medical School, University of East Anglia, Norwich, UK
| | - Jamie A Moore
- Bob Champion Research and Education Building, Norwich Medical School, University of East Anglia, Norwich, UK
| | - Kristian M Bowles
- Bob Champion Research and Education Building, Norwich Medical School, University of East Anglia, Norwich, UK
- Department of Haematology, Norfolk and Norwich University Hospital, Norwich, UK
| | - Stuart A Rushworth
- Bob Champion Research and Education Building, Norwich Medical School, University of East Anglia, Norwich, UK.
| | - Marc D Moncrieff
- Bob Champion Research and Education Building, Norwich Medical School, University of East Anglia, Norwich, UK.
- Department of Plastic and Reconstructive Surgery, Norfolk and Norwich University Hospital, Norwich, NR4 7UY, UK.
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12
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Coenzyme Q Depletion Reshapes MCF-7 Cells Metabolism. Int J Mol Sci 2020; 22:ijms22010198. [PMID: 33379147 PMCID: PMC7795339 DOI: 10.3390/ijms22010198] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/22/2020] [Accepted: 12/25/2020] [Indexed: 02/06/2023] Open
Abstract
Mitochondrial dysfunction plays a significant role in the metabolic flexibility of cancer cells. This study aimed to investigate the metabolic alterations due to Coenzyme Q depletion in MCF-7 cells. Method: The Coenzyme Q depletion was induced by competitively inhibiting with 4-nitrobenzoate the coq2 enzyme, which catalyzes one of the final reactions in the biosynthetic pathway of CoQ. The bioenergetic and metabolic characteristics of control and coenzyme Q depleted cells were investigated using polarographic and spectroscopic assays. The effect of CoQ depletion on cell growth was analyzed in different metabolic conditions. Results: we showed that cancer cells could cope from energetic and oxidative stress due to mitochondrial dysfunction by reshaping their metabolism. In CoQ depleted cells, the glycolysis was upregulated together with increased glucose consumption, overexpression of GLUT1 and GLUT3, as well as activation of pyruvate kinase (PK). Moreover, the lactate secretion rate was reduced, suggesting that the pyruvate flux was redirected, toward anabolic pathways. Finally, we found a different expression pattern in enzymes involved in glutamine metabolism, and TCA cycle in CoQ depleted cells in comparison to controls. Conclusion: This work elucidated the metabolic alterations in CoQ-depleted cells and provided an insightful understanding of cancer metabolism targeting.
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13
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Mendes C, Serpa J. Revisiting lactate dynamics in cancer—a metabolic expertise or an alternative attempt to survive? J Mol Med (Berl) 2020; 98:1397-1414. [DOI: 10.1007/s00109-020-01965-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/14/2020] [Accepted: 08/14/2020] [Indexed: 12/15/2022]
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14
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Vozáriková V, Kunová N, Bauer JA, Frankovský J, Kotrasová V, Procházková K, Džugasová V, Kutejová E, Pevala V, Nosek J, Tomáška Ľ. Mitochondrial HMG-Box Containing Proteins: From Biochemical Properties to the Roles in Human Diseases. Biomolecules 2020; 10:biom10081193. [PMID: 32824374 PMCID: PMC7463775 DOI: 10.3390/biom10081193] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 12/14/2022] Open
Abstract
Mitochondrial DNA (mtDNA) molecules are packaged into compact nucleo-protein structures called mitochondrial nucleoids (mt-nucleoids). Their compaction is mediated in part by high-mobility group (HMG)-box containing proteins (mtHMG proteins), whose additional roles include the protection of mtDNA against damage, the regulation of gene expression and the segregation of mtDNA into daughter organelles. The molecular mechanisms underlying these functions have been identified through extensive biochemical, genetic, and structural studies, particularly on yeast (Abf2) and mammalian mitochondrial transcription factor A (TFAM) mtHMG proteins. The aim of this paper is to provide a comprehensive overview of the biochemical properties of mtHMG proteins, the structural basis of their interaction with DNA, their roles in various mtDNA transactions, and the evolutionary trajectories leading to their rapid diversification. We also describe how defects in the maintenance of mtDNA in cells with dysfunctional mtHMG proteins lead to different pathologies at the cellular and organismal level.
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Affiliation(s)
- Veronika Vozáriková
- Department of Genetics, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B-1, 842 15 Bratislava, Slovakia; (V.V.); (J.F.); (K.P.); (V.D.)
| | - Nina Kunová
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia; (N.K.); (J.A.B.); (V.K.); (E.K.); (V.P.)
| | - Jacob A. Bauer
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia; (N.K.); (J.A.B.); (V.K.); (E.K.); (V.P.)
| | - Ján Frankovský
- Department of Genetics, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B-1, 842 15 Bratislava, Slovakia; (V.V.); (J.F.); (K.P.); (V.D.)
| | - Veronika Kotrasová
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia; (N.K.); (J.A.B.); (V.K.); (E.K.); (V.P.)
| | - Katarína Procházková
- Department of Genetics, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B-1, 842 15 Bratislava, Slovakia; (V.V.); (J.F.); (K.P.); (V.D.)
| | - Vladimíra Džugasová
- Department of Genetics, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B-1, 842 15 Bratislava, Slovakia; (V.V.); (J.F.); (K.P.); (V.D.)
| | - Eva Kutejová
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia; (N.K.); (J.A.B.); (V.K.); (E.K.); (V.P.)
| | - Vladimír Pevala
- Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 845 51 Bratislava, Slovakia; (N.K.); (J.A.B.); (V.K.); (E.K.); (V.P.)
| | - Jozef Nosek
- Department of Biochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina CH-1, 842 15 Bratislava, Slovakia;
| | - Ľubomír Tomáška
- Department of Genetics, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B-1, 842 15 Bratislava, Slovakia; (V.V.); (J.F.); (K.P.); (V.D.)
- Correspondence: ; Tel.: +421-2-90149-433
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15
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Omidian K, Rafiei H, Bandy B. Increased mitochondrial content and function by resveratrol and select flavonoids protects against benzo[a]pyrene-induced bioenergetic dysfunction and ROS generation in a cell model of neoplastic transformation. Free Radic Biol Med 2020; 152:767-775. [PMID: 31972341 DOI: 10.1016/j.freeradbiomed.2020.01.021] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 01/07/2020] [Accepted: 01/17/2020] [Indexed: 12/14/2022]
Abstract
Dietary polyphenols act in cancer prevention and may inhibit carcinogenesis. A possible mitochondrial mechanism for carcinogen-induced neoplastic transformation and chemoprevention by polyphenols, however, is largely unexplored. Using the Bhas 42 cell model of carcinogen-induced neoplastic transformation, we investigated benzo[a]pyrene (B[a]P) along with different polyphenols for their effects on mitochondrial content and function, and on mitochondrial and intracellular ROS generation. Bhas 42 cells were either co-treated with 5 μM polyphenol starting 2 h before exposure to 4 μM B[a]P for 24 or 72 h, or pre-treated with polyphenol for 24 h and removed prior to B[a]P exposure. Exposure to B[a]P decreased mitochondrial content (by 46% after 24 h and 30% after 72 h), decreased mitochondrial membrane potential and cellular ATP, and increased generation of mitochondrial superoxide and intracellular ROS. Polyphenol co-treatments protected against the decreased mitochondrial content, with resveratrol being the most effective (increasing the mitochondrial content after 72 h by 75%). Measurements after 24 h of mRNA for mitochondria-related proteins and of SIRT1 enzyme activity suggested an involvement of increased mitochondrial biogenesis in the polyphenol effects. The polyphenol co-treatments also ameliorated B[a]P-induced deficits in mitochondrial function (most strongly resveratrol), and increases in generation of mitochondrial superoxide and intracellular ROS. Notably, 24 h pre-treatments with polyphenols strongly suppressed subsequent B[a]P-induced increases, after 24 and 72 h, in mitochondrial superoxide and intracellular ROS generation, with resveratrol being the most effective. In conclusion, the results support a mechanism for B[a]P carcinogenesis involving impaired mitochondrial function and increased mitochondria-derived ROS, that can be ameliorated by dietary polyphenols. The evidence supports an increase in mitochondrial biogenesis behind the strong chemoprevention by resveratrol, and a mitochondrial antioxidant effect in chemoprevention by quercetin.
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Affiliation(s)
- Kosar Omidian
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, S7N 5E5, Canada.
| | - Hossein Rafiei
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, S7N 5E5, Canada.
| | - Brian Bandy
- College of Pharmacy and Nutrition, University of Saskatchewan, Saskatoon, SK, S7N 5E5, Canada.
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16
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MCU-induced mitochondrial calcium uptake promotes mitochondrial biogenesis and colorectal cancer growth. Signal Transduct Target Ther 2020; 5:59. [PMID: 32371956 PMCID: PMC7200750 DOI: 10.1038/s41392-020-0155-5] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/30/2020] [Accepted: 04/03/2020] [Indexed: 02/07/2023] Open
Abstract
Mitochondrial calcium uniporter (MCU) has an important role in regulating mitochondrial calcium (Ca2+) homeostasis. Dysregulation of mitochondrial Ca2+ homeostasis has been implicated in various cancers. However, it remains unclear whether MCU regulates mitochondrial Ca2+ uptake to promote cell growth in colorectal cancer (CRC). Therefore, in the present study the expression of MCU in CRC tissues and its clinical significance were examined. Following which, the biological function of MCU-mediated mitochondrial Ca2+ uptake in CRC cell growth and the underlying mechanisms were systematically evaluated using in in vitro and in vivo assays, which included western blotting, cell viability and apoptosis assays, as well as xenograft nude mice models. Our results demonstrated that MCU was markedly upregulated in CRC tissues at both the mRNA and protein levels. Upregulated MCU was associated with poor prognosis in patients with CRC. Our data reported that upregulation of MCU enhanced the mitochondrial Ca2+ uptake to promote mitochondrial biogenesis, which in turn facilitated CRC cell growth in vitro and in vivo. In terms of the underlying mechanism, it was identified that MCU-mediated mitochondrial Ca2+ uptake inhibited the phosphorylation of transcription factor A, mitochondrial (TFAM), and thus enhanced its stability to promote mitochondrial biogenesis. Furthermore, our data indicated that increased mitochondrial Ca2+ uptake led to increased mitochondrial production of ROS via the upregulation of mitochondrial biogenesis, which subsequently activated NF-κB signaling to accelerate CRC growth. In conclusion, the results indicated that MCU-induced mitochondrial Ca2+ uptake promotes mitochondrial biogenesis by suppressing phosphorylation of TFAM, thus contributing to CRC cell growth. Our findings reveal a novel mechanism underlying mitochondrial Ca2+-mediated CRC cell growth and may provide a potential pharmacological target for CRC treatment.
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17
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Jing YY, Cai FF, Zhang L, Han J, Yang L, Tang F, Li YB, Chang JF, Sun F, Yang XM, Sun FL, Chen S. Epigenetic regulation of the Warburg effect by H2B monoubiquitination. Cell Death Differ 2020; 27:1660-1676. [PMID: 31685978 PMCID: PMC7206070 DOI: 10.1038/s41418-019-0450-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 10/20/2019] [Accepted: 10/21/2019] [Indexed: 12/12/2022] Open
Abstract
Cancer cells reprogram their energy metabolic system from the mitochondrial oxidative phosphorylation (OXPHOS) pathway to a glucose-dependent aerobic glycolysis pathway. This metabolic reprogramming phenomenon is known as the Warburg effect, a significant hallmark of cancer. However, the detailed mechanisms underlying this event or triggering this reprogramming remain largely unclear. Here, we found that histone H2B monoubiquitination (H2Bub1) negatively regulates the Warburg effect and tumorigenesis in human lung cancer cells (H1299 and A549 cell lines) likely through controlling the expression of multiple mitochondrial respiratory genes, which are essential for OXPHOS. Moreover, our work also suggested that pyruvate kinase M2 (PKM2), the rate-limiting enzyme of glycolysis, can directly interact with H2B in vivo and in vitro and negatively regulate the level of H2Bub1. The inhibition of cell proliferation and nude mice xenograft of human lung cancer cells induced by PKM2 knockdown can be partially rescued through lowering H2Bub1 levels, which indicates that the oncogenic function of PKM2 is achieved, at least partially, through the control of H2Bub1. Furthermore, PKM2 and H2Bub1 levels are negatively correlated in cancer specimens. Therefore, these findings not only provide a novel mechanism triggering the Warburg effect that is mediated through an epigenetic pathway (H2Bub1) but also reveal a novel metabolic regulator (PKM2) for the epigenetic mark H2Bub1. Thus, the PKM2-H2Bub1 axis may become a promising cancer therapeutic target.
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Grants
- the National Natural Science Foundation of China (Grant No.: 81773009,81972650), the Fundamental Research Funds for the Central Universities (Xi’an Jiao Tong University, Grant No.: 2017qngz13), and the China Postdoctoral Science Foundation (Grant No.: 2017M613149 and 2018T111038).
- the National Key Research and Development Program of China (Grant No.: 2017YFA0103301, 2016YFA0100403), the 973 program of the Ministry of Science and Technology of China (Grant No.: 2015CB856204, 2015CB964802), the National Natural Science Foundation of China (Grant No.: 91419304, 31330043, and 31271534)
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Affiliation(s)
- Yuan-Ya Jing
- Research Center for Translational Medicine at East Hospital, School of Life Sciences and Technology, Advanced Institute of Translational Medicine, Tongji University, Shanghai, 200092, PR China
| | - Feng-Feng Cai
- Department of Breast Surgery, Yangpu Hospital, Tongji University School of Medicine, Shanghai, PR China
| | - Lei Zhang
- Research Center for Translational Medicine at East Hospital, School of Life Sciences and Technology, Advanced Institute of Translational Medicine, Tongji University, Shanghai, 200092, PR China
| | - Jing Han
- Laboratory of Molecular and Cellular Biology, School of Forensic Sciences, School of Basic Medicine, Center for Translational Medicine at The First Affiliated Hospital, Xi'an Jiao Tong University Health Science Center, Xi'an, 710061, Shaanxi, PR China
| | - Lu Yang
- Laboratory of Molecular and Cellular Biology, School of Forensic Sciences, School of Basic Medicine, Center for Translational Medicine at The First Affiliated Hospital, Xi'an Jiao Tong University Health Science Center, Xi'an, 710061, Shaanxi, PR China
| | - Fan Tang
- Research Center for Translational Medicine at East Hospital, School of Life Sciences and Technology, Advanced Institute of Translational Medicine, Tongji University, Shanghai, 200092, PR China
| | - Ya-Bin Li
- Research Center for Translational Medicine at East Hospital, School of Life Sciences and Technology, Advanced Institute of Translational Medicine, Tongji University, Shanghai, 200092, PR China
| | - Jian-Feng Chang
- Research Center for Translational Medicine at East Hospital, School of Life Sciences and Technology, Advanced Institute of Translational Medicine, Tongji University, Shanghai, 200092, PR China
| | - Feng Sun
- Research Center for Translational Medicine at East Hospital, School of Life Sciences and Technology, Advanced Institute of Translational Medicine, Tongji University, Shanghai, 200092, PR China
| | - Xiao-Mei Yang
- Research Center for Translational Medicine at East Hospital, School of Life Sciences and Technology, Advanced Institute of Translational Medicine, Tongji University, Shanghai, 200092, PR China.
| | - Fang-Lin Sun
- Research Center for Translational Medicine at East Hospital, School of Life Sciences and Technology, Advanced Institute of Translational Medicine, Tongji University, Shanghai, 200092, PR China.
| | - Su Chen
- Laboratory of Molecular and Cellular Biology, School of Forensic Sciences, School of Basic Medicine, Center for Translational Medicine at The First Affiliated Hospital, Xi'an Jiao Tong University Health Science Center, Xi'an, 710061, Shaanxi, PR China.
- School of Forensics and Laboratory Medicine, Jining Medical University, Jining, 272067, Shandong, PR China.
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18
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Abstract
During nearly 100 years of research on cancer cachexia (CC), science has been reciting the same mantra: it is a multifactorial syndrome. The aim of this paper is to show that the symptoms are many, but they have a single cause: anoxia. CC is a complex and devastating condition that affects a high proportion of advanced cancer patients. Unfortunately, it cannot be reversed by traditional nutritional support and it generally reduces survival time. It is characterized by significant weight loss, mainly from fat deposits and skeletal muscles. The occurrence of cachexia in cancer patients is usually a late phenomenon. The conundrum is why do similar patients with similar tumors, develop cachexia and others do not? Even if cachexia is mainly a metabolic dysfunction, there are other issues involved such as the activation of inflammatory responses and crosstalk between different cell types. The exact mechanism leading to a wasting syndrome is not known, however there are some factors that are surely involved, such as anorexia with lower calorie intake, increased glycolytic flux, gluconeogenesis, increased lipolysis and severe tumor hypoxia. Based on this incomplete knowledge we put together a scheme explaining the molecular mechanisms behind cancer cachexia, and surprisingly, there is one cause that explains all of its characteristics: anoxia. With this different view of CC we propose a treatment based on the physiopathology that leads from anoxia to the symptoms of CC. The fundamentals of this hypothesis are based on the idea that CC is the result of anoxia causing intracellular lactic acidosis. This is a dangerous situation for cell survival which can be solved by activating energy consuming gluconeogenesis. The process is conducted by the hypoxia inducible factor-1α. This hypothesis was built by putting together pieces of evidence produced by authors working on related topics.
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19
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Doxorubicin Inhibits Phosphatidylserine Decarboxylase and Modifies Mitochondrial Membrane Composition in HeLa Cells. Int J Mol Sci 2020; 21:ijms21041317. [PMID: 32075281 PMCID: PMC7072979 DOI: 10.3390/ijms21041317] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 02/11/2020] [Accepted: 02/13/2020] [Indexed: 12/25/2022] Open
Abstract
Doxorubicin (DXR) is a drug widely used in chemotherapy. Its mode of action is based on its intercalation properties, involving the inhibition of topoisomerase II. However, few studies have reported the mitochondrial effects of DXR while investigating cardiac toxicity induced by the treatment, mostly in pediatric cases. Here, we demonstrate that DXR alters the mitochondrial membrane composition associated with bioenergetic impairment and cell death in human cancer cells. The remodeling of the mitochondrial membrane was explained by phosphatidylserine decarboxylase (PSD) inhibition by DXR. PSD catalyzes phosphatidylethanolamine (PE) synthesis from phosphatidylserine (PS), and DXR altered the PS/PE ratio in the mitochondrial membrane. Moreover, we observed that DXR localized to the mitochondrial compartment and drug uptake was rapid. Evaluation of other topoisomerase II inhibitors did not show any impact on the mitochondrial membrane composition, indicating that the DXR effect was specific. Therefore, our findings revealed a side molecular target for DXR and PSD, potentially involved in DXR anti-cancer properties and the associated toxicity.
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Ma L, Zong X. Metabolic Symbiosis in Chemoresistance: Refocusing the Role of Aerobic Glycolysis. Front Oncol 2020; 10:5. [PMID: 32038983 PMCID: PMC6992567 DOI: 10.3389/fonc.2020.00005] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Accepted: 01/06/2020] [Indexed: 12/12/2022] Open
Abstract
Cellular metabolic reprogramming is now recognized as a hallmark of tumors. Altered tumor metabolism determines the malignant biological behaviors and phenotypes of cancer. More recently, studies have begun to reveal that cancer cells generally exhibit increased glycolysis or oxidative phosphorylation (OXPHOS) for Adenosine Triphosphate(ATP)generation, which is frequently associated with drug resistance. The metabolism of drug-resistant cells is regulated by the PI3K/AKT/mTOR pathway which ultimately confer cancer cells drug resistance phenotype. The key enzymes involved in glycolysis and the key molecules in relevant pathways have been used as targets to reverse drug resistance. In this review, we highlight our current understanding of the role of metabolic symbiosis in therapeutic resistance and discuss the ongoing effort to develop metabolic inhibitors as anti-cancer drugs to overcome drug resistance to classical chemotherapy.
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Affiliation(s)
- Lisi Ma
- Department of Breast Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xiangyun Zong
- Department of Breast Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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21
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Romero-Garcia S, Prado-Garcia H, Valencia-Camargo AD, Alvarez-Pulido A. Lactic Acidosis Promotes Mitochondrial Biogenesis in Lung Adenocarcinoma Cells, Supporting Proliferation Under Normoxia or Survival Under Hypoxia. Front Oncol 2019; 9:1053. [PMID: 31681589 PMCID: PMC6811519 DOI: 10.3389/fonc.2019.01053] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 09/27/2019] [Indexed: 11/17/2022] Open
Abstract
Lactic acidosis, glucose deprivation and hypoxia are conditions frequently found in solid tumors because, among other reasons, tumors switch to Warburg effect and secrete high levels of lactate, which decreases the pH (<6. 9) in the microenvironment. We hypothesized that lung cancer cells consume lactate and induce mitochondrial biogenesis to support survival and proliferation in lactic acidosis with glucose deprivation even under hypoxia. We examined lung adenocarcinoma cell lines (A-427 and A-549), a breast cancer cell line (MCF-7) and non-transformed fibroblasts (MRC-5). Cells were cultured using RPMI-1640 medium with 28 mM lactate varying pH (6.2 or 7.2) under normoxia (atmospheric O2) or hypoxia (2% O2). Cellular growth was followed during 96 h, as well as lactate, glutamine and glutamate levels, which were measured using a biochemical analyzer. The expression levels of monocarboxylate transporters (MCT1 and MCT4) were evaluated by flow cytometry. To evaluate mitochondrial biogenesis, mitochondrial mass was analyzed by flow cytometry and epifluorescence microscopy. Also, mitochondrial DNA (mtDNA) was measured by qPCR. Transcript levels of Nuclear Respiratory Factors (NRF-1 and NRF-2) and Transcription Factor A Mitochondrial (TFAM) were determined using RT-qPCR. The specific growth rate of A-549 and A-427 cells increased in lactic acidosis compared with neutral lactosis, either under normoxia or hypoxia, a phenomenon that was not observed in MRC-5 fibroblasts. Under hypoxia, A-427 and MCF-7 cells did not survive in neutral lactosis but survived in lactic acidosis. Under lactic acidosis, A-427 and MCF-7 cells increased MCT1 levels, reduced MCT4 levels and consumed higher lactate amounts, while A-549 cells consumed glutamine and decreased MCT1 and MCT4 levels with respect to neutral lactosis condition. Lactic acidosis, either under normoxia or hypoxia, increased mitochondrial mass and mtDNA levels compared with neutral lactosis in all tumor cells but not in fibroblasts. A-549 and MCF-7 cells increased levels of NRF-1, NRF-2, and TFAM with respect to MRC-5 cells, whereas A-427 cells upregulated these transcripts under lactic acidosis compared with neutral lactosis. Thus, lung adenocarcinoma cells induce mitochondrial biogenesis to support survival and proliferation in lactic acidosis with glucose deprivation.
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22
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Lebelo MT, Joubert AM, Visagie MH. Warburg effect and its role in tumourigenesis. Arch Pharm Res 2019; 42:833-847. [PMID: 31473944 DOI: 10.1007/s12272-019-01185-2] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 08/27/2019] [Indexed: 12/17/2022]
Abstract
Glucose is a crucial molecule in energy production and produces different end products in non-tumourigenic- and tumourigenic tissue metabolism. Tumourigenic cells oxidise glucose by fermentation and generate lactate and adenosine triphosphate even in the presence of oxygen (Warburg effect). The Na+/H+-antiporter is upregulated in tumourigenic cells resulting in release of lactate- and H+ ions into the extracellular space. Accumulation of lactate- and proton ions in the extracellular space results in an acidic environment that promotes invasion and metastasis. Otto Warburg reported that tumourigenic cells have defective mitochondria that produce less energy. However, decades later it became evident that these mitochondria have adapted with alterations in mitochondrial content, structure, function and activity. Mitochondrial biogenesis and mitophagy regulate the formation of new mitochondria and degradation of defective mitochondria in order to combat accumulation of mutagenic mitochondrial deoxyribonucleic acid. Tumourigenic cells also produce increase reactive oxygen species (ROS) resulting from upregulated glycolysis leading to pathogenesis including cancer. Moderate ROS levels exert proliferative- and prosurvival signaling, while high ROS quantities induce cell death. Understanding the crosstalk between aberrant metabolism, redox regulation, mitochondrial adaptions and pH regulation provides scientific- and medical communities with new opportunities to explore cancer therapies.
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Affiliation(s)
- Maphuti T Lebelo
- Department of Physiology, University of Pretoria, Private Bag X323, Arcadia, Pretoria, 0007, South Africa
| | - Anna M Joubert
- Department of Physiology, University of Pretoria, Private Bag X323, Arcadia, Pretoria, 0007, South Africa
| | - Michelle H Visagie
- Department of Physiology, University of Pretoria, Private Bag X323, Arcadia, Pretoria, 0007, South Africa.
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23
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Niedzwiecka K, Tisi R, Penna S, Lichocka M, Plochocka D, Kucharczyk R. Two mutations in mitochondrial ATP6 gene of ATP synthase, related to human cancer, affect ROS, calcium homeostasis and mitochondrial permeability transition in yeast. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2017; 1865:117-131. [PMID: 28986220 DOI: 10.1016/j.bbamcr.2017.10.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 09/15/2017] [Accepted: 10/02/2017] [Indexed: 02/06/2023]
Abstract
The relevance of mitochondrial DNA (mtDNA) mutations in cancer process is still unknown. Since the mutagenesis of mitochondrial genome in mammals is not possible yet, we have exploited budding yeast S. cerevisiae as a model to study the effects of tumor-associated mutations in the mitochondrial MTATP6 gene, encoding subunit 6 of ATP synthase, on the energy metabolism. We previously reported that four mutations in this gene have a limited impact on the production of cellular energy. Here we show that two mutations, Atp6-P163S and Atp6-K90E (human MTATP6-P136S and MTATP6-K64E, found in prostate and thyroid cancer samples, respectively), increase sensitivity of yeast cells both to compounds inducing oxidative stress and to high concentrations of calcium ions in the medium, when Om45p, the component of porin complex in outer mitochondrial membrane (OM), was fused to GFP. In OM45-GFP background, these mutations affect the activation of yeast permeability transition pore (yPTP, also called YMUC, yeast mitochondrial unspecific channel) upon calcium induction. Moreover, we show that calcium addition to isolated mitochondria heavily induced the formation of ATP synthase dimers and oligomers, recently proposed to form the core of PTP, which was slower in the mutants. We show the genetic evidence for involvement of mitochondrial ATP synthase in calcium homeostasis and permeability transition in yeast. This paper is a first to show, although in yeast model organism, that mitochondrial ATP synthase mutations, which accumulate during carcinogenesis process, may be significant for cancer cell escape from apoptosis.
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Affiliation(s)
- Katarzyna Niedzwiecka
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Renata Tisi
- Dept. Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy; Milan Center for Neuroscience, Milan, Italy
| | - Sara Penna
- Dept. Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Malgorzata Lichocka
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Danuta Plochocka
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Roza Kucharczyk
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland.
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24
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Dar S, Chhina J, Mert I, Chitale D, Buekers T, Kaur H, Giri S, Munkarah A, Rattan R. Bioenergetic Adaptations in Chemoresistant Ovarian Cancer Cells. Sci Rep 2017; 7:8760. [PMID: 28821788 PMCID: PMC5562731 DOI: 10.1038/s41598-017-09206-0] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 07/24/2017] [Indexed: 12/28/2022] Open
Abstract
Earlier investigations have revealed that tumor cells undergo metabolic reprogramming and mainly derive their cellular energy from aerobic glycolysis rather than oxidative phosphorylation even in the presence of oxygen. However, recent studies have shown that certain cancer cells display increased oxidative phosphorylation or high metabolically active phenotype. Cellular bioenergetic profiling of 13 established and 12 patient derived ovarian cancer cell lines revealed significant bioenergetics diversity. The bioenergetics phenotype of ovarian cancer cell lines correlated with functional phenotypes of doubling time and oxidative stress. Interestingly, chemosensitive cancer cell lines (A2780 and PEO1) displayed a glycolytic phenotype while their chemoresistant counterparts (C200 and PEO4) exhibited a high metabolically active phenotype with the ability to switch between oxidative phosphorylation or glycolysis. The chemosensitive cancer cells could not survive glucose deprivation, while the chemoresistant cells displayed adaptability. In the patient derived ovarian cancer cells, a similar correlation was observed between a high metabolically active phenotype and chemoresistance. Thus, ovarian cancer cells seem to display heterogeneity in using glycolysis or oxidative phosphorylation as an energy source. The flexibility in using different energy pathways may indicate a survival adaptation to achieve a higher ‘cellular fitness’ that may be also associated with chemoresistance.
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Affiliation(s)
- Sajad Dar
- Division of Gynecology Oncology, Department of Women's Health Services, Henry Ford Health System, Detroit, MI, 48202, USA
| | - Jasdeep Chhina
- Division of Gynecology Oncology, Department of Women's Health Services, Henry Ford Health System, Detroit, MI, 48202, USA
| | - Ismail Mert
- Department of Obstetrics and Gynecology, Wayne State School of Medicine, Detroit, MI, 48202, USA
| | - Dhananjay Chitale
- Department of Pathology, Henry Ford Health System, Detroit, MI, 48202, USA
| | - Thomas Buekers
- Division of Gynecology Oncology, Department of Women's Health Services, Henry Ford Health System, Detroit, MI, 48202, USA
| | - Hareena Kaur
- Division of Gynecology Oncology, Department of Women's Health Services, Henry Ford Health System, Detroit, MI, 48202, USA
| | - Shailendra Giri
- Department of Neurology, Henry Ford Health System, Detroit, MI, 48202, USA
| | - Adnan Munkarah
- Division of Gynecology Oncology, Department of Women's Health Services, Henry Ford Health System, Detroit, MI, 48202, USA
| | - Ramandeep Rattan
- Division of Gynecology Oncology, Department of Women's Health Services, Henry Ford Health System, Detroit, MI, 48202, USA.
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25
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The opposite prognostic effect of NDUFS1 and NDUFS8 in lung cancer reflects the oncojanus role of mitochondrial complex I. Sci Rep 2016; 6:31357. [PMID: 27516145 PMCID: PMC4981865 DOI: 10.1038/srep31357] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 07/12/2016] [Indexed: 11/26/2022] Open
Abstract
A recent surge of research on complex I mitochondrial DNA indicates that complex I disassembly regulated by mutation threshold plays a critical role in tumor progression. However, nuclear DNA (nDNA)-encoded core subunits are still a neglected area for cancer investigation. In this study, respective prognostic contributions of 7 nDNA-encoded core subunits were analyzed by immunohistochemical staining and RNA expression data extracted from public resources. The results showed that NDUFS1 and NDUFS8 had the most significant prognostic power in NSCLC patients among all 7 nDNA-encoded core subunits. Patients with low NDUFS1 or high NDUFS8 IHC and RNA expression levels had poor overall survival. Because of the significant correlation between expressions of 7 nDNA-encoded core subunits, multivariate analysis was performed and identified NDUFS1 and NDUFS8 IHC and RNA expression levels retained their leading prognostic roles. By combining NDFUS1 and NDUFS8 as a panel, the most unfavorable prognostic group had a 14-fold increased risk of poor prognosis than the most favorable prognostic group. In conclusion, the opposite prognostic effect of nDNA-encoded core subunits suggests the oncojanus role of nuclear genes regulating complex I dysfunction. The panel with NDUFS1 and NDUFS8 reflecting tumor metabolism status is a novel prognostic predictor for lung cancer.
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26
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Wisnovsky S, Jean SR, Liyanage S, Schimmer A, Kelley SO. Mitochondrial DNA repair and replication proteins revealed by targeted chemical probes. Nat Chem Biol 2016; 12:567-73. [DOI: 10.1038/nchembio.2102] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 03/24/2016] [Indexed: 01/16/2023]
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27
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DNA Tumor Viruses and Cell Metabolism. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:6468342. [PMID: 27034740 PMCID: PMC4789518 DOI: 10.1155/2016/6468342] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2015] [Accepted: 02/08/2016] [Indexed: 12/31/2022]
Abstract
Viruses play an important role in cancerogenesis. It is estimated that approximately 20% of all cancers are linked to infectious agents. The viral genes modulate the physiological machinery of infected cells that lead to cell transformation and development of cancer. One of the important adoptive responses by the cancer cells is their metabolic change to cope up with continuous requirement of cell survival and proliferation. In this review we will focus on how DNA viruses alter the glucose metabolism of transformed cells. Tumor DNA viruses enhance “aerobic” glycolysis upon virus-induced cell transformation, supporting rapid cell proliferation and showing the Warburg effect. Moreover, viral proteins enhance glucose uptake and controls tumor microenvironment, promoting metastasizing of the tumor cells.
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28
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Serguienko A, Grad I, Wennerstrøm AB, Meza-Zepeda LA, Thiede B, Stratford EW, Myklebost O, Munthe E. Metabolic reprogramming of metastatic breast cancer and melanoma by let-7a microRNA. Oncotarget 2016; 6:2451-65. [PMID: 25669981 PMCID: PMC4385863 DOI: 10.18632/oncotarget.3235] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 12/10/2014] [Indexed: 12/28/2022] Open
Abstract
Let-7 microRNAs (miRNAs) are highly conserved well-established promoters of terminal differentiation that are expressed in healthy adult tissues and frequently repressed in cancer cells. The tumor suppressive role of let-7 in a variety of cancers in vitro and in vivo has been widely documented and prompted these miRNAs to be candidate genes for miRNA replacement therapy. In this study we described a new role of let-7a in reprogramming cancer metabolism, recently identified as a new hallmark of cancer. We show that let-7a down-regulates key anabolic enzymes and increases both oxidative phosphorylation and glycolysis in triple-negative breast cancer and metastatic melanoma cell lines. Strikingly, the accelerated glycolysis coexists with drastically reduced cancer features. Moreover, let-7a causes mitochondrial ROS production concomitant with the up-regulation of oxidative stress responsive genes. To exploit these increased ROS levels for therapeutic purposes, we combined let-7a transfection with the chemotherapeutic drug doxorubicin. In both cancer types let-7a increased cell sensitivity to doxorubicin. Pre-treatment with N-acetyl cysteine (NAC) totally abolished this effect, indicating that the increased doxorubicin sensitivity of let-7a cells depends on the redox pathway. We thus have demonstrated that let-7a plays a prominent role in regulating energy metabolism in cancer cells, further expanding its therapeutic potential.
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Affiliation(s)
- Anastassia Serguienko
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Cancer Stem Cell Innovation Centre, Oslo, Norway
| | - Iwona Grad
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Cancer Stem Cell Innovation Centre, Oslo, Norway
| | - Anna B Wennerstrøm
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Cancer Stem Cell Innovation Centre, Oslo, Norway
| | - Leonardo A Meza-Zepeda
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Genomics Core Facility, Oslo University Hospital, Oslo, Norway
| | - Bernd Thiede
- The Biotechnology Centre of Oslo, University of Oslo, Oslo, Norway.,Department of Biosciences, University of Oslo, Oslo, Norway
| | - Eva W Stratford
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Cancer Stem Cell Innovation Centre, Oslo, Norway
| | - Ola Myklebost
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Cancer Stem Cell Innovation Centre, Oslo, Norway.,Department of Biosciences, University of Oslo, Oslo, Norway
| | - Else Munthe
- Department of Tumor Biology, Institute of Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.,Cancer Stem Cell Innovation Centre, Oslo, Norway
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29
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Urra FA, Córdova-Delgado M, Lapier M, Orellana-Manzano A, Acevedo-Arévalo L, Pessoa-Mahana H, González-Vivanco JM, Martínez-Cifuentes M, Ramírez-Rodríguez O, Millas-Vargas JP, Weiss-López B, Pavani M, Ferreira J, Araya-Maturana R. Small structural changes on a hydroquinone scaffold determine the complex I inhibition or uncoupling of tumoral oxidative phosphorylation. Toxicol Appl Pharmacol 2015; 291:46-57. [PMID: 26712467 DOI: 10.1016/j.taap.2015.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 12/12/2015] [Accepted: 12/15/2015] [Indexed: 12/31/2022]
Abstract
Mitochondria participate in several distinctiveness of cancer cell, being a promising target for the design of anti-cancer compounds. Previously, we described that ortho-carbonyl hydroquinone scaffold 14 inhibits the complex I-dependent respiration with selective anti-proliferative effect on mouse mammary adenocarcinoma TA3/Ha cancer cells; however, the structural requirements of this hydroquinone scaffold to affect the oxidative phosphorylation (OXPHOS) of cancer cells have not been studied in detail. Here, we characterize the mitochondrial metabolism of TA3/Ha cancer cells, which exhibit a high oxidative metabolism, and evaluate the effect of small structural changes of the hydroquinone scaffold 14 on the respiration of this cell line. Our results indicate that these structural changes modify the effect on OXPHOS, obtaining compounds with three alternative actions: inhibitors of complex I-dependent respiration, uncoupler of OXPHOS and compounds with both actions. To confirm this, the effect of a bicyclic hydroquinone (9) was evaluated in isolated mitochondria. Hydroquinone 9 increased mitochondrial respiration in state 4o without effects on the ADP-stimulated respiration (state 3ADP), decreasing the complexes I and II-dependent respiratory control ratio. The effect on mitochondrial respiration was reversed by 6-ketocholestanol addition, indicating that this hydroquinone is a protonophoric uncoupling agent. In intact TA3/Ha cells, hydroquinone 9 caused mitochondrial depolarization, decreasing intracellular ATP and NAD(P)H levels and GSH/GSSG ratio, and slightly increasing the ROS levels. Moreover, it exhibited selective NAD(P)H availability-dependent anti-proliferative effect on cancer cells. Therefore, our results indicate that the ortho-carbonyl hydroquinone scaffold offers the possibility to design compounds with specific actions on OXPHOS of cancer cells.
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Affiliation(s)
- Félix A Urra
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile.
| | - Miguel Córdova-Delgado
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Michel Lapier
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile
| | - Andrea Orellana-Manzano
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile
| | - Luis Acevedo-Arévalo
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Hernán Pessoa-Mahana
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Jaime M González-Vivanco
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | | | - Oney Ramírez-Rodríguez
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Juan Pablo Millas-Vargas
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Boris Weiss-López
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
| | - Mario Pavani
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile
| | - Jorge Ferreira
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile.
| | - Ramiro Araya-Maturana
- Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, Talca, Chile.
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30
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Shahraki K, Goudarzi PK, Makateb A, Shirzadi K, Darian EK, Khosravifard K, Jadidi K. RETRACTED ARTICLE: The expression of mitochondrial complexes I and III correlates with prognosis or diagnosis in retinoblastoma: immunohistochemical and histopathological parameters. Tumour Biol 2015; 37:10.1007/s13277-015-4365-3. [PMID: 26541759 DOI: 10.1007/s13277-015-4365-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
- Kourosh Shahraki
- Department of Ophthalmology, Alzahra Eye Hospital, Zahedan University of Medical Sciences, Zahedan, Iran
| | | | - Ali Makateb
- Department of Ophthalmology, AJA University of Medical Sciences, Tehran, Iran
| | - Keyvan Shirzadi
- Department of Ophthalmology, AJA University of Medical Sciences, Tehran, Iran
| | | | - Keivan Khosravifard
- Department of Ophthalmology, AJA University of Medical Sciences, Tehran, Iran
| | - Khosrow Jadidi
- Department of Ophthalmology, Baqiyatallah University of Medical Sciences, Tehran, Iran.
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31
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James AD, Patel W, Butt Z, Adiamah M, Dakhel R, Latif A, Uggenti C, Swanton E, Imamura H, Siriwardena AK, Bruce JIE. The Plasma Membrane Calcium Pump in Pancreatic Cancer Cells Exhibiting the Warburg Effect Relies on Glycolytic ATP. J Biol Chem 2015; 290:24760-71. [PMID: 26294767 PMCID: PMC4598988 DOI: 10.1074/jbc.m115.668707] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Indexed: 12/15/2022] Open
Abstract
Evidence suggests that the plasma membrane Ca2+-ATPase (PMCA), which is critical for maintaining a low intracellular Ca2+ concentration ([Ca2+]i), utilizes glycolytically derived ATP in pancreatic ductal adenocarcinoma (PDAC) and that inhibition of glycolysis in PDAC cell lines results in ATP depletion, PMCA inhibition, and an irreversible [Ca2+]i overload. We explored whether this is a specific weakness of highly glycolytic PDAC by shifting PDAC cell (MIA PaCa-2 and PANC-1) metabolism from a highly glycolytic phenotype toward mitochondrial metabolism and assessing the effects of mitochondrial versus glycolytic inhibitors on ATP depletion, PMCA inhibition, and [Ca2+]i overload. The highly glycolytic phenotype of these cells was first reversed by depriving MIA PaCa-2 and PANC-1 cells of glucose and supplementing with α-ketoisocaproate or galactose. These culture conditions resulted in a significant decrease in both glycolytic flux and proliferation rate, and conferred resistance to ATP depletion by glycolytic inhibition while sensitizing cells to mitochondrial inhibition. Moreover, in direct contrast to cells exhibiting a high glycolytic rate, glycolytic inhibition had no effect on PMCA activity and resting [Ca2+]i in α-ketoisocaproate- and galactose-cultured cells, suggesting that the glycolytic dependence of the PMCA is a specific vulnerability of PDAC cells exhibiting the Warburg phenotype.
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Affiliation(s)
| | | | | | | | | | | | - Carolina Uggenti
- the Faculty of Medical and Human Sciences, University of Manchester, Manchester M13 9PT, United Kingdom
| | | | - Hiromi Imamura
- the Hakubi Center for Advanced Research and Graduate School of Biostudies, Kyoto University, Kyoto 606-8501, Japan, and
| | - Ajith K Siriwardena
- the Hepatobiliary Surgery Unit, Manchester Royal Infirmary, Manchester M13 9NT, United Kingdom
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32
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Alvero AB, Montagna MK, Sumi NJ, Joo WD, Graham E, Mor G. Multiple blocks in the engagement of oxidative phosphorylation in putative ovarian cancer stem cells: implication for maintenance therapy with glycolysis inhibitors. Oncotarget 2015; 5:8703-15. [PMID: 25237928 PMCID: PMC4226715 DOI: 10.18632/oncotarget.2367] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Survival rate in ovarian cancer has not improved since chemotherapy was introduced a few decades ago. The dismal prognosis is mostly due to disease recurrence where majority of the patients succumb to the disease. The demonstration that tumors are comprised of subfractions of cancer cells displaying heterogeneity in stemness potential, chemoresistance, and tumor repair capacity suggests that recurrence may be driven by the chemoresistant cancer stem cells. Thus to improve patient survival, novel therapies should eradicate this cancer cell population. We show that in contrast to the more differentiated ovarian cancer cells, the putative CD44+/MyD88+ ovarian cancer stem cells express lower levels of pyruvate dehydrogenase, Cox–I, Cox-II, and Cox–IV, and higher levels of UCP2. Together, this molecular phenotype establishes a bioenergetic profile that prefers the use of glycolysis over oxidative phosphorylation to generate ATP. This bioenergetic profile is conserved in vivo and therefore a maintenance regimen of 2-deoxyglucose administered after Paclitaxel treatment is able to delay the progression of recurrent tumors and decrease tumor burden in mice. Our findings strongly suggest the value of maintenance with glycolysis inhibitors with the goal of improving survival in ovarian cancer patients.
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Affiliation(s)
- Ayesha B Alvero
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Michele K Montagna
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Natalia J Sumi
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Won Duk Joo
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Emma Graham
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
| | - Gil Mor
- Department of Obstetrics, Gynecology and Reproductive Sciences, Yale University School of Medicine, New Haven, CT, USA
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33
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Singh L, Saini N, Bakhshi S, Pushker N, Sen S, Sharma A, Kaur J, Kashyap S. Prognostic significance of mitochondrial oxidative phosphorylation complexes: Therapeutic target in the treatment of retinoblastoma. Mitochondrion 2015; 23:55-63. [PMID: 26071002 DOI: 10.1016/j.mito.2015.06.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Revised: 03/20/2015] [Accepted: 06/02/2015] [Indexed: 12/31/2022]
Abstract
PURPOSE Altered energy metabolism plays an important role in the development and progression of cancer. The objective of this study was to elucidate the role of mitochondrial oxidative phosphorylation complexes and their prognostic significance in retinoblastoma (Rb). METHODS Immunohistochemistry was performed on 109 primary enucleated retinoblastoma tissues for mitochondrial OXPHOS complexes and their expression was confirmed by western blotting. RESULTS Histopathological high risk factors (HRFs) were identified in 42.2% cases. Mitochondrial OXPHOS complexes III, IV and V were expressed in more than 50% of primary retinoblastoma cases each whereas mitochondrial complex I was expressed in only 29/109 (26.60%) cases by immunohistochemistry. Loss of mitochondrial complex I correlated well with poor tumor differentiation and tumor invasion (p < 0.05) whereas expression of mitochondrial complexes III, IV and V was associated with better survival (Kaplan-Meier method). CONCLUSIONS This was the first study predicting a relevant role of mitochondrial OXPHOS complexes and highlights the prognostic significance with patient outcome in retinoblastoma. Loss of mitochondrial complex I immunoexpression could prove to be a useful independent prognostic biomarker to identify high risk retinoblastoma patients. Differential expression of these mitochondrial complexes is a novel finding and may be used as an attractive future anticancer target in primary retinoblastoma tumors. FINANCIAL DISCLOSURE The author(s) have no proprietary or commercial interest in any materials discussed in this article.
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Affiliation(s)
- Lata Singh
- Department of Ocular Pathology, Dr. R. P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Neeru Saini
- Functional Genomics Unit, Institute of Genomics and Integrative Biology, Mall Road, New Delhi, India
| | - Sameer Bakhshi
- Department of Medical Oncology, IRCH, All India Institute of Medical Sciences, New Delhi, India
| | - Neelam Pushker
- Department of Ophthalmology, Dr. R. P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Seema Sen
- Department of Ocular Pathology, Dr. R. P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Anjana Sharma
- Department of Ocular Microbiology, Dr. R. P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Jasbir Kaur
- Department of Ocular Biochemistry, Dr. R. P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Seema Kashyap
- Department of Ocular Pathology, Dr. R. P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
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34
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Smolková K, Dvořák A, Zelenka J, Vítek L, Ježek P. Reductive carboxylation and 2-hydroxyglutarate formation by wild-type IDH2 in breast carcinoma cells. Int J Biochem Cell Biol 2015; 65:125-33. [PMID: 26007236 DOI: 10.1016/j.biocel.2015.05.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 02/27/2015] [Accepted: 05/14/2015] [Indexed: 12/27/2022]
Abstract
Mitochondrial NADPH-dependent isocitrate dehydrogenase, IDH2, and cytosolic IDH1, catalyze reductive carboxylation of 2-oxoglutarate. Both idh2 and idh1 monoallelic mutations are harbored in grade 2/3 gliomas, secondary glioblastomas and acute myeloid leukemia. Mutant IDH1/IDH2 enzymes were reported to form an oncometabolite r-2-hydroxyglutarate (2HG), further strengthening malignancy. We quantified CO2-dependent reductive carboxylation glutaminolysis (RCG) and CO2-independent 2HG production in HTB-126 and MDA-MB-231 breast carcinoma cells by measuring (13)C incorporation from 1-(13)C-glutamine into citrate, malate, and 2HG. For HTB-126 cells, (13)C-citrate, (13)C-malate, and (13)C-2-hydroxyglutarate were enriched by 2-, 5-, and 15-fold at 5mM glucose (2-, 2.5-, and 13-fold at 25 mM glucose), respectively, after 6 h. Such enrichment decreased by 6% with IDH1 silencing, but by 30-50% upon IDH2 silencing while cell respiration and ATP levels rose up to 150%. Unlike 2HG production RCG declined at decreasing CO2. At hypoxia (5% O2), IDH2-related and unrelated (13)C-accumulation into citrate and malate increased 1.5-2.5-fold with unchanged IDH2 expression; whereas hypoxic 2HG formation did not. (13)C-2HG originated by ∼50% from other than IDH2 or IDH1 reactions, substantiating remaining activity in IDH1&2-silenced cells. Relatively high basal (12)C-2HG levels existed (5-fold higher vs. non-tumor HTB-125 cells) and (13)C-2HG was formed despite the absence of any idh2 and idh1 mutations in HTB-126 cells. Since RCG is enhanced at hypoxia (frequent in solid tumors) and 2HG can be formed without idh1/2 mutations, we suggest 2HG as an analytic marker (in serum, urine, or biopsies) predicting malignancy of breast cancer in all patients.
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Affiliation(s)
- Katarína Smolková
- Department of Membrane Transport Biophysics, No.75, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
| | - Aleš Dvořák
- Department of Membrane Transport Biophysics, No.75, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic; Institute of Medical Biochemistry and Laboratory Diagnostics, Department of Internal Medicine, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
| | - Jaroslav Zelenka
- Department of Membrane Transport Biophysics, No.75, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
| | - Libor Vítek
- Institute of Medical Biochemistry and Laboratory Diagnostics, Department of Internal Medicine, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic.
| | - Petr Ježek
- Department of Membrane Transport Biophysics, No.75, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
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Carlson EA, Marquez RT, Du F, Wang Y, Xu L, Yan SS. Overexpression of 17β-hydroxysteroid dehydrogenase type 10 increases pheochromocytoma cell growth and resistance to cell death. BMC Cancer 2015; 15:166. [PMID: 25879199 PMCID: PMC4384325 DOI: 10.1186/s12885-015-1173-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 03/06/2015] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND 17β-hydroxysteroid dehydrogenase type 10 (HSD10) has been shown to play a protective role in cells undergoing stress. Upregulation of HSD10 under nutrient-limiting conditions leads to recovery of a homeostatic state. Across disease states, increased HSD10 levels can have a profound and varied impact, such as beneficial in Parkinson's disease and harmful in Alzheimer's disease. Recently, HSD10 overexpression has been observed in some prostate and bone cancers, consistently correlating with poor patient prognosis. As the role of HSD10 in cancer remains underexplored, we propose that cancer cells utilize this enzyme to promote cancer cell survival under cell death conditions. METHODS The proliferative effect of HSD10 was examined in transfected pheochromocytoma cells by growth curve analysis and a xenograft model. Fluctuations in mitochondrial bioenergetics were evaluated by electron transport chain complex enzyme activity assays and energy production. Additionally, the effect of HSD10 on pheochromocytoma resistance to cell death was investigated using TUNEL staining, MTT, and complex IV enzyme activity assays. RESULTS In this study, we examined the tumor-promoting effect of HSD10 in pheochromocytoma cells. Overexpression of HSD10 increased pheochromocytoma cell growth in both in vitro cell culture and an in vivo xenograft mouse model. The increases in respiratory enzymes and energy generation observed in HSD10-overexpressing cells likely supported the accelerated growth rate observed. Furthermore, cells overexpressing HSD10 were more resistant to oxidative stress-induced perturbation. CONCLUSIONS Our findings demonstrate that overexpression of HSD10 accelerates pheochromocytoma cell growth, enhances cell respiration, and increases cellular resistance to cell death induction. This suggests that blockade of HSD10 may halt and/or prevent cancer growth, thus providing a promising novel target for cancer patients as a screening or therapeutic option.
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Affiliation(s)
- Emily A Carlson
- Department of Pharmacology & Toxicology, University of Kansas, Lawrence, KS, 66047, USA. .,Higuchi Biosciences Center, University of Kansas, Lawrence, KS, 66047, USA.
| | - Rebecca T Marquez
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS, 66047, USA.
| | - Fang Du
- Department of Pharmacology & Toxicology, University of Kansas, Lawrence, KS, 66047, USA. .,Higuchi Biosciences Center, University of Kansas, Lawrence, KS, 66047, USA.
| | - Yongfu Wang
- Department of Pharmacology & Toxicology, University of Kansas, Lawrence, KS, 66047, USA. .,Higuchi Biosciences Center, University of Kansas, Lawrence, KS, 66047, USA.
| | - Liang Xu
- Department of Molecular Biosciences, University of Kansas, Lawrence, KS, 66047, USA.
| | - Shirley ShiDu Yan
- Department of Pharmacology & Toxicology, University of Kansas, Lawrence, KS, 66047, USA. .,Higuchi Biosciences Center, University of Kansas, Lawrence, KS, 66047, USA.
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Vatrinet R, Iommarini L, Kurelac I, De Luise M, Gasparre G, Porcelli AM. Targeting respiratory complex I to prevent the Warburg effect. Int J Biochem Cell Biol 2015; 63:41-5. [PMID: 25668477 DOI: 10.1016/j.biocel.2015.01.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 01/15/2015] [Accepted: 01/29/2015] [Indexed: 12/20/2022]
Abstract
In the last 10 years, studies of energetic metabolism in different tumors clearly indicate that the definition of Warburg effect, i.e. the glycolytic shift cells undergo upon transformation, ought to be revisited considering the metabolic plasticity of cancer cells. In fact, recent findings show that the shift from glycolysis to re-established oxidative metabolism is required for certain steps of tumor progression, suggesting that mitochondrial function and, in particular, respiratory complex I are crucial for metabolic and hypoxic adaptation. Based on these evidences, complex I can be considered a lethality target for potential anticancer strategies. In conclusion, in this mini review we summarize and discuss why it is not paradoxical to develop pharmacological and genome editing approaches to target complex I as novel adjuvant therapies for cancer treatment. This article is part of a Directed Issue entitled: Energy Metabolism Disorders and Therapies.
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Affiliation(s)
- Renaud Vatrinet
- Dipartimento di Farmacia e Biotecnologie (FABIT), Università di Bologna, via Irnerio 42, 40126 Bologna, Italy; Dipartimento di Scienze Mediche e Chirurgiche (DIMEC), U.O. Genetica Medica, Pol. Universitario S. Orsola-Malpighi, Università di Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Luisa Iommarini
- Dipartimento di Farmacia e Biotecnologie (FABIT), Università di Bologna, via Irnerio 42, 40126 Bologna, Italy
| | - Ivana Kurelac
- Dipartimento di Scienze Mediche e Chirurgiche (DIMEC), U.O. Genetica Medica, Pol. Universitario S. Orsola-Malpighi, Università di Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Monica De Luise
- Dipartimento di Scienze Mediche e Chirurgiche (DIMEC), U.O. Genetica Medica, Pol. Universitario S. Orsola-Malpighi, Università di Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Giuseppe Gasparre
- Dipartimento di Scienze Mediche e Chirurgiche (DIMEC), U.O. Genetica Medica, Pol. Universitario S. Orsola-Malpighi, Università di Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Anna Maria Porcelli
- Dipartimento di Farmacia e Biotecnologie (FABIT), Università di Bologna, via Irnerio 42, 40126 Bologna, Italy; Centro Interdipartimentale di Ricerca Industriale Scienze della Vita e Tecnologie per la Salute, Università di Bologna, 40100 Bologna, Italy.
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Lynam-Lennon N, Connaughton R, Carr E, Mongan AM, O’Farrell NJ, Porter RK, Brennan L, Pidgeon GP, Lysaght J, Reynolds JV, O’Sullivan J. Excess visceral adiposity induces alterations in mitochondrial function and energy metabolism in esophageal adenocarcinoma. BMC Cancer 2014; 14:907. [PMID: 25471892 PMCID: PMC4265417 DOI: 10.1186/1471-2407-14-907] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 11/20/2014] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Visceral obesity has a strong association with both the incidence and mortality of esophageal adenocarcinoma (EAC). Alterations in mitochondrial function and energy metabolism is an emerging hallmark of cancer, however, the potential role that obesity plays in driving these alterations in EAC is currently unknown. METHODS Adipose conditioned media (ACM) was prepared from visceral adipose tissue taken from computed tomography-determined viscerally-obese and non-obese EAC patients. Mitochondrial function in EAC cell lines was assessed using fluorescent probes, mitochondrial gene expression was assessed using qPCR-based gene arrays and intracellular ATP levels were determined using a luminescence-based kit. Glycolysis and oxidative phosphophorylation was measured using Seahorse XF technology and metabolomic analysis was performed using 1H NMR. Expression of metabolic markers was assessed in EAC tumor biopsies by qPCR. RESULTS ACM from obese EAC patients significantly increased mitochondrial mass and mitochondrial membrane potential in EAC cells, which was significantly associated with visceral fat area, and was coupled with a significant decrease in reactive oxygen species. This mitochondrial dysfunction was accompanied by altered expression of 19 mitochondrial-associated genes and significantly reduced intracellular ATP levels. ACM from obese EAC patients induced a metabolic shift to glycolysis in EAC cells, which was coupled with significantly increased sensitivity to the glycolytic inhibitor 2-deoxyglucose. Metabolomic profiling demonstrated an altered glycolysis and amino acid-related signature in ACM from obese patients. In EAC tumors, expression of the glycolytic marker PKM2 was significantly positively associated with obesity. CONCLUSION This study demonstrates for the first time that ACM from viscerally-obese EAC patients elicits an altered metabolic profile and can drive mitochondrial dysfunction and altered energy metabolism in EAC cells in vitro. In vivo, in EAC patient tumors, expression of the glycolytic enzyme PKM2 is positively associated with obesity.
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Affiliation(s)
- Niamh Lynam-Lennon
- />Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| | - Ruth Connaughton
- />Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
- />Nutrigenomics Research Group, University College Dublin, Dublin, Ireland
| | - Eibhlin Carr
- />Institute of Food and Health, University College Dublin, Dublin, Ireland
| | - Ann-Marie Mongan
- />Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| | - Naoimh J O’Farrell
- />Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| | - Richard K Porter
- />School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute (TBSI), Trinity College Dublin, Dublin, Ireland
| | - Lorraine Brennan
- />Institute of Food and Health, University College Dublin, Dublin, Ireland
| | - Graham P Pidgeon
- />Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| | - Joanne Lysaght
- />Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| | - John V Reynolds
- />Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
| | - Jacintha O’Sullivan
- />Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, Dublin, Ireland
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de Moura MB, Van Houten B. Bioenergetic analysis of intact mammalian cells using the Seahorse XF24 Extracellular Flux analyzer and a luciferase ATP assay. Methods Mol Biol 2014; 1105:589-602. [PMID: 24623254 DOI: 10.1007/978-1-62703-739-6_40] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Metabolic pathways and bioenergetics were described in great detail over half a century ago, and during the past decade there has been a resurgence in integrating these cellular processes with other biological properties of the cell, including growth control, protein kinase cascade signaling, cell cycle division, and autophagy. Since many disease conditions are associated with altered metabolism and production of energy, it is important to develop new approaches to measure these cellular parameters. This chapter summarizes a new and exciting approach based on the Seahorse XF24 Extracelluar Flux analyzer, which takes real time measurements of oxidative phosphorylation and glycolysis in living cells. These bioenergetic profiles are then compared with steady-state levels of cellular ATP as measured by a luciferase assay.
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Affiliation(s)
- Michelle Barbi de Moura
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Phelan JJ, MacCarthy F, Feighery R, O'Farrell NJ, Lynam-Lennon N, Doyle B, O'Toole D, Ravi N, Reynolds JV, O'Sullivan J. Differential expression of mitochondrial energy metabolism profiles across the metaplasia-dysplasia-adenocarcinoma disease sequence in Barrett's oesophagus. Cancer Lett 2014; 354:122-31. [PMID: 25107643 DOI: 10.1016/j.canlet.2014.07.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 07/21/2014] [Accepted: 07/30/2014] [Indexed: 12/30/2022]
Abstract
Contemporary clinical management of Barrett's oesophagus has highlighted the lack of accurate predictive markers of disease progression to oesophageal cancer. This study aims to examine alterations in mitochondrial energy metabolism profiles across the entire disease progression sequence in Barrett's oesophagus. An in-vitro model was used to screen 84 genes associated with mitochondrial energy metabolism. Three energy metabolism genes (ATP12A, COX4I2, COX8C) were significantly altered across the in-vitro Barrett's disease sequence. In-vivo validations across the Barrett's sequence demonstrated differential expression of these genes. Tissue microarrays demonstrated significant alterations in both epithelial and stromal oxidative phosphorylation (ATP5B and Hsp60) and glycolytic (PKM2 and GAPDH) protein markers across the in-vivo Barrett's sequence. Levels of ATP5B in sequential follow up surveillance biopsy material segregated Barrett's non progressors and progressors to HGD and cancer. Utilising the Seahorse XF24 flux analyser, in-vitro Barrett's and adenocarcinoma cells exhibited altered levels of various oxidative parameters. We show for the first time that mitochondrial energy metabolism is differentially altered across the metaplasia-dysplasia-adenocarcinoma sequence and that oxidative phosphorylation profiles have predictive value in segregating Barrett's non progressors and progressors to adenocarcinoma.
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Affiliation(s)
- J J Phelan
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, St. James's Hospital, Dublin, Ireland
| | - F MacCarthy
- Department of Clinical Medicine, Institute of Molecular Medicine, Trinity College Dublin, St. James's Hospital, Dublin, Ireland
| | - R Feighery
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, St. James's Hospital, Dublin, Ireland
| | - N J O'Farrell
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, St. James's Hospital, Dublin, Ireland
| | - N Lynam-Lennon
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, St. James's Hospital, Dublin, Ireland
| | - B Doyle
- Department of Pathology, St. James's Hospital, Dublin, Ireland
| | - D O'Toole
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, St. James's Hospital, Dublin, Ireland
| | - N Ravi
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, St. James's Hospital, Dublin, Ireland
| | - J V Reynolds
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, St. James's Hospital, Dublin, Ireland
| | - J O'Sullivan
- Department of Surgery, Institute of Molecular Medicine, Trinity College Dublin, St. James's Hospital, Dublin, Ireland.
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40
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Lynam-Lennon N, Maher SG, Maguire A, Phelan J, Muldoon C, Reynolds JV, O’Sullivan J. Altered mitochondrial function and energy metabolism is associated with a radioresistant phenotype in oesophageal adenocarcinoma. PLoS One 2014; 9:e100738. [PMID: 24968221 PMCID: PMC4072695 DOI: 10.1371/journal.pone.0100738] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 05/30/2014] [Indexed: 01/12/2023] Open
Abstract
Neoadjuvant chemoradiation therapy (CRT) is increasingly the standard of care for locally advanced oesophageal cancer. A complete pathological response to CRT is associated with a favourable outcome. Radiation therapy is important for local tumour control, however, radioresistance remains a substantial clinical problem. We hypothesise that alterations in mitochondrial function and energy metabolism are involved in the radioresistance of oesophageal adenocarcinoma (OAC). To investigate this, we used an established isogenic cell line model of radioresistant OAC. Radioresistant cells (OE33 R) demonstrated significantly increased levels of random mitochondrial mutations, which were coupled with alterations in mitochondrial function, size, morphology and gene expression, supporting a role for mitochondrial dysfunction in the radioresistance of this model. OE33 R cells also demonstrated altered bioenergetics, demonstrating significantly increased intracellular ATP levels, which was attributed to enhanced mitochondrial respiration. Radioresistant cells also demonstrated metabolic plasticity, efficiently switching between the glycolysis and oxidative phosphorylation energy metabolism pathways, which were accompanied by enhanced clonogenic survival. This data was supported in vivo, in pre-treatment OAC tumour tissue. Tumour ATP5B expression, a marker of oxidative phosphorylation, was significantly increased in patients who subsequently had a poor pathological response to neoadjuvant CRT. This suggests for the first time, a role for specific mitochondrial alterations and metabolic remodelling in the radioresistance of OAC.
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Affiliation(s)
| | - Stephen G. Maher
- Department of Surgery, Trinity College Dublin, Dublin, Ireland
- Cancer Biology and Therapeutics Lab, School of Biological, Biomedical and Environmental Sciences, University of Hull, Hull, United Kingdom
| | - Aoife Maguire
- Department of Pathology, St James’s Hospital, Dublin, Ireland
| | - James Phelan
- Department of Surgery, Trinity College Dublin, Dublin, Ireland
| | - Cian Muldoon
- Department of Pathology, St James’s Hospital, Dublin, Ireland
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41
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Arseneault R, Chien A, Newington JT, Rappon T, Harris R, Cumming RC. Attenuation of LDHA expression in cancer cells leads to redox-dependent alterations in cytoskeletal structure and cell migration. Cancer Lett 2013; 338:255-66. [DOI: 10.1016/j.canlet.2013.03.034] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 03/28/2013] [Accepted: 03/30/2013] [Indexed: 01/22/2023]
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Bhujade A, Gupta G, Talmale S, Das SK, Patil MB. Induction of apoptosis in A431 skin cancer cells by Cissus quadrangularis Linn stem extract by altering Bax-Bcl-2 ratio, release of cytochrome c from mitochondria and PARP cleavage. Food Funct 2013; 4:338-46. [PMID: 23175101 DOI: 10.1039/c2fo30167a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Skin is generally damaged through genetic and environmental factors such as smoking, exposure to xenobiotics, heat, hormonal changes, and ultraviolet light. These factors can cause skin diseases. Cissus quadrangularis Linn. (CQ) has been used in folk medicine for the treatment of skin diseases since ancient times. Taking in to consideration the medicinal properties exhibited by this genus, it was decided to investigate the anti-cancer activity of CQ. Extracts obtained from CQ and their phenolic contents were subjected to in vitro evaluation of anticancer activity by using A431 (skin epidermoid carcinoma, human) cell line. The A431 cells were treated with different extracts of CQ in a dose dependent manner. Out of five extracts, the acetone extract demonstrated significant anti-cancer activity in the A431 cell line. Hexane, chloroform, ethyl acetate and methanol extracts also exhibited cytotoxicity but to a comparatively lesser extent than the acetone extract. The GI(50) value of the acetone extract was found to be 8 μg mL(-1), whereas GI(50) value of purified fraction of acetone extract, termed as AFCQ (active acetone fraction of CQ) with respect to A431 cells, was found to be 4.8 μg mL(-1). Furthermore, the mechanism of anticancer activity exhibited by AFCQ was investigated by comparing its effect with the standard anticancer drug Doxorubicin (DOX) by evaluating the status of apoptotic markers after treatment of A431 cells with AFCQ and DOX. Bax-Bcl-2 ratio along with the release of cytochrome c from mitochondria to cytoplasm, which is a hallmark of apoptosis, was also evaluated. Cleavage of PARP revealed that AFCQ induces apoptosis in A431 cells with reference to DOX.
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Affiliation(s)
- Arti Bhujade
- Department of Biochemistry, Nagpur University, LIT Premises, Nagpur, Maharashtra, India.
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Zhu J, Wang KZQ, Chu CT. After the banquet: mitochondrial biogenesis, mitophagy, and cell survival. Autophagy 2013; 9:1663-76. [PMID: 23787782 DOI: 10.4161/auto.24135] [Citation(s) in RCA: 228] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Mitochondria are highly dynamic organelles of crucial importance to the proper functioning of neuronal, cardiac and other cell types dependent upon aerobic efficiency. Mitochondrial dysfunction has been implicated in numerous human conditions, to include cancer, metabolic diseases, neurodegeneration, diabetes, and aging. In recent years, mitochondrial turnover by macroautophagy (mitophagy) has captured the limelight, due in part to discoveries that genes linked to Parkinson disease regulate this quality control process. A rapidly growing literature is clarifying effector mechanisms that underlie the process of mitophagy; however, factors that regulate positive or negative cellular outcomes have been less studied. Here, we review the literature on two major pathways that together may determine cellular adaptation vs. cell death in response to mitochondrial dysfunction. Mitochondrial biogenesis and mitophagy represent two opposing, but coordinated processes that determine mitochondrial content, structure, and function. Recent data indicate that the capacity to undergo mitochondrial biogenesis, which is dysregulated in disease states, may play a key role in determining cell survival following mitophagy-inducing injuries. The current literature on major pathways that regulate mitophagy and mitochondrial biogenesis is summarized, and mechanisms by which the interplay of these two processes may determine cell fate are discussed. We conclude that in primary neurons and other mitochondrially dependent cells, disruptions in any phase of the mitochondrial recycling process can contribute to cellular dysfunction and disease. Given the emerging importance of crosstalk among regulators of mitochondrial function, autophagy, and biogenesis, signaling pathways that coordinate these processes may contribute to therapeutic strategies that target or regulate mitochondrial turnover and regeneration.
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Affiliation(s)
- Jianhui Zhu
- Department of Pathology; Division of Neuropathology; University of Pittsburgh School of Medicine; Pittsburgh, PA USA
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Iommarini L, Calvaruso MA, Kurelac I, Gasparre G, Porcelli AM. Complex I impairment in mitochondrial diseases and cancer: Parallel roads leading to different outcomes. Int J Biochem Cell Biol 2013; 45:47-63. [DOI: 10.1016/j.biocel.2012.05.016] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 05/03/2012] [Accepted: 05/24/2012] [Indexed: 02/06/2023]
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Binder NK, Mitchell M, Gardner DK. Parental diet-induced obesity leads to retarded early mouse embryo development and altered carbohydrate utilisation by the blastocyst. Reprod Fertil Dev 2012; 24:804-12. [PMID: 22781931 DOI: 10.1071/rd11256] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Accepted: 12/03/2011] [Indexed: 02/04/2023] Open
Abstract
Maternal obesity results in reproductive complications, whereas the impact of paternal obesity is unclear. In the present study, the effects of parental obesity on preimplantation embryo cell cycle length and carbohydrate utilisation were investigated. Maternal and paternal obesity were assessed independently by deriving zygotes from normal or obese C57BL/6 female mice mated with normal Swiss male mice (maternal obesity), or from normal Swiss female mice mated with normal or obese C57BL/6 male mice (paternal obesity). Zygotes were cultured in vitro and development was then assessed by time-lapse microscopy and metabolism determined using ultramicrofluorescence. Maternal obesity was associated with a significant delay in precompaction cell cycle kinetics from the 1-cell stage. A significant increase in glucose consumption by embryos from obese compared with normal females occurred after compaction, although glycolysis remained unchanged. Similarly, paternal obesity led to significant delays in cell cycle progression during preimplantation embryo development. However, this developmental delay was observed from the second cleavage stage onwards, following embryonic genome activation. Blastocysts from obese males showed disproportionate changes in carbohydrate metabolism, with significantly increased glycolysis. Overall, metabolic changes were not inhibitory to blastocyst formation; however, blastocyst cell numbers were significantly lower when either parent was obese. These data suggest that both maternal and paternal obesity significantly impacts preimplantation embryo physiology.
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Affiliation(s)
- Natalie K Binder
- Department of Zoology, University of Melbourne, Parkville 3010, Victoria, Australia
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Bellance N, Pabst L, Allen G, Rossignol R, Nagrath D. Oncosecretomics coupled to bioenergetics identifies α-amino adipic acid, isoleucine and GABA as potential biomarkers of cancer: Differential expression of c-Myc, Oct1 and KLF4 coordinates metabolic changes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2012; 1817:2060-71. [DOI: 10.1016/j.bbabio.2012.07.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 06/23/2012] [Accepted: 07/19/2012] [Indexed: 02/04/2023]
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47
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Jose C, Rossignol R. Rationale for mitochondria-targeting strategies in cancer bioenergetic therapies. Int J Biochem Cell Biol 2012; 45:123-9. [PMID: 22776740 DOI: 10.1016/j.biocel.2012.07.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 06/13/2012] [Accepted: 07/01/2012] [Indexed: 01/24/2023]
Abstract
In the 1920s, Otto Warburg first hypothesized that mitochondrial impairment is a leading cause of cancer although he recognized the existence of oxidative tumors. Likewise, Weinhouse and others in the 50s found that deficient mitochondrial respiration is not an obligatory feature of cancer and Peter Vaupel suggested in the 1990s that tumor oxygenation rather than OXPHOS capacity was the limiting factor of mitochondrial energy production in cancer. Recent studies now clearly indicate that mitochondria are highly functional in mice tumors and the field of oncobioenergetic identified MYC, Oct1 and RAS as pro-OXPHOS oncogenes. In addition, cancer cells adaptation to aglycemia, metabolic symbiosis between hypoxic and non-hypoxic tumor regions as well the reverse Warburg hypothesis support the crucial role of mitochondria in the survival of a subclass of tumors. Therefore, mitochondria are now considered as potential targets for anti-cancer therapy and tentative strategies including a bioenergetic profile characterization of the tumor and the subsequent adapted bioenergetic modulation could be considered for cancer killing. This article is part of a Directed Issue entitled: Bioenergetic dysfunction, adaptation and therapy.
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Affiliation(s)
- Caroline Jose
- Univ. Bordeaux, Maladies Rares: Génétique et Métabolisme (MRGM), EA 4576, F-33000 Bordeaux, France
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48
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Michel S, Wanet A, De Pauw A, Rommelaere G, Arnould T, Renard P. Crosstalk between mitochondrial (dys)function and mitochondrial abundance. J Cell Physiol 2012; 227:2297-310. [PMID: 21928343 DOI: 10.1002/jcp.23021] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A controlled regulation of mitochondrial mass through either the production (biogenesis) or the degradation (mitochondrial quality control) of the organelle represents a crucial step for proper mitochondrial and cell function. Key steps of mitochondrial biogenesis and quality control are overviewed, with an emphasis on the role of mitochondrial chaperones and proteases that keep mitochondria fully functional, provided the mitochondrial activity impairment is not excessive. In this case, the whole organelle is degraded by mitochondrial autophagy or "mitophagy." Beside the maintenance of adequate mitochondrial abundance and functions for cell homeostasis, mitochondrial biogenesis might be enhanced, through discussed signaling pathways, in response to various physiological stimuli, like contractile activity, exposure to low temperatures, caloric restriction, and stem cells differentiation. In addition, mitochondrial dysfunction might also initiate a retrograde response, enabling cell adaptation through increased mitochondrial biogenesis.
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Affiliation(s)
- Sébastien Michel
- Laboratory of Biochemistry and Cell Biology (URBC), NARILIS (Namur Research Institute for Life Sciences), University of Namur (FUNDP), Namur, Belgium
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49
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Valsecchi F, Monge C, Forkink M, de Groof AJC, Benard G, Rossignol R, Swarts HG, van Emst-de Vries SE, Rodenburg RJ, Calvaruso MA, Nijtmans LGJ, Heeman B, Roestenberg P, Wieringa B, Smeitink JAM, Koopman WJH, Willems PHGM. Metabolic consequences of NDUFS4 gene deletion in immortalized mouse embryonic fibroblasts. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2012; 1817:1925-36. [PMID: 22430089 DOI: 10.1016/j.bbabio.2012.03.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 03/01/2012] [Accepted: 03/04/2012] [Indexed: 12/17/2022]
Abstract
Human mitochondrial complex I (CI) deficiency is associated with progressive neurological disorders. To better understand the CI pathomechanism, we here studied how deletion of the CI gene NDUFS4 affects cell metabolism. To this end we compared immortalized mouse embryonic fibroblasts (MEFs) derived from wildtype (wt) and whole-body NDUFS4 knockout (KO) mice. Mitochondria from KO cells lacked the NDUFS4 protein and mitoplasts displayed virtually no CI activity, moderately reduced CII, CIII and CIV activities and normal citrate synthase and CV (F(o)F(1)-ATPase) activity. Native electrophoresis of KO cell mitochondrial fractions revealed two distinct CI subcomplexes of ~830kDa (enzymatically inactive) and ~200kDa (active). The level of fully-assembled CII-CV was not affected by NDUFS4 gene deletion. KO cells exhibited a moderately reduced maximal and routine O(2) consumption, which was fully inhibited by acute application of the CI inhibitor rotenone. The aberrant CI assembly and reduced O(2) consumption in KO cells were fully normalized by NDUFS4 gene complementation. Cellular [NAD(+)]/[NADH] ratio, lactate production and mitochondrial tetramethyl rhodamine methyl ester (TMRM) accumulation were slightly increased in KO cells. In contrast, NDUFS4 gene deletion did not detectably alter [NADP(+)]/[NADPH] ratio, cellular glucose consumption, the protein levels of hexokinases (I and II) and phosphorylated pyruvate dehydrogenase (P-PDH), total cellular adenosine triphosphate (ATP) level, free cytosolic [ATP], cell growth rate, and reactive oxygen species (ROS) levels. We conclude that the NDUFS4 subunit is of key importance in CI stabilization and that, due to the metabolic properties of the immortalized MEFs, NDUFS4 gene deletion has only modest effects at the live cell level. This article is part of a special issue entitled: 17th European Bioenergetics Conference (EBEC 2012).
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Affiliation(s)
- Federica Valsecchi
- Department of Biochemistry, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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Faragher RGA, Burton DGA, Majecha P, Fong NSY, Davis T, Sheerin A, Ostler EL. Resveratrol, but not dihydroresveratrol, induces premature senescence in primary human fibroblasts. AGE (DORDRECHT, NETHERLANDS) 2011; 33:555-564. [PMID: 21318333 PMCID: PMC3220406 DOI: 10.1007/s11357-010-9201-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2009] [Accepted: 12/13/2010] [Indexed: 05/30/2023]
Abstract
Resveratrol, trans-3,5,4'-trihydroxystilbene, is a polyphenolic compound which has been reported to mimic the gene expression patterns seen in whole animals undergoing dietary restriction. The mechanism of action of resveratrol remains poorly understood, but modulation of both cellular proliferation and apoptosis has been proposed as important routes by which the molecule may exert its effects. This study reports the effects of both resveratrol and dihydroresveratrol (a primary in vivo metabolite) on the proliferative capacity of human primary fibroblasts. No generalised reduction in the growth fraction was observed when fibroblasts derived from three different tissues were treated with resveratrol at concentrations of 10 μm or less. However, concentrations above 25 μm produced a dose-dependent reduction in proliferation. This loss of the growth fraction was paralleled by an increase in the senescent fraction as determined by staining for senescence associated beta galactosidase and dose recovery studies conducted over a 7-day period. Entry into senescence in response to treatment with resveratrol could be blocked by a 30-min preincubation with the p38 MAP kinase inhibitor SB203580. No effects on proliferation were observed when cells were treated with dihydroresveratrol at concentrations of up to 100 μm.
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Affiliation(s)
- Richard G A Faragher
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Moulsecoomb, Brighton, East Sussex, UK.
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