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Koltai T, Fliegel L. Exploring monocarboxylate transporter inhibition for cancer treatment. Explor Target Antitumor Ther 2024; 5:135-169. [PMID: 38464385 PMCID: PMC10918235 DOI: 10.37349/etat.2024.00210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 12/01/2023] [Indexed: 03/12/2024] Open
Abstract
Cells are separated from the environment by a lipid bilayer membrane that is relatively impermeable to solutes. The transport of ions and small molecules across this membrane is an essential process in cell biology and metabolism. Monocarboxylate transporters (MCTs) belong to a vast family of solute carriers (SLCs) that facilitate the transport of certain hydrophylic small compounds through the bilipid cell membrane. The existence of 446 genes that code for SLCs is the best evidence of their importance. In-depth research on MCTs is quite recent and probably promoted by their role in cancer development and progression. Importantly, it has recently been realized that these transporters represent an interesting target for cancer treatment. The search for clinically useful monocarboxylate inhibitors is an even more recent field. There is limited pre-clinical and clinical experience with new inhibitors and their precise mechanism of action is still under investigation. What is common to all of them is the inhibition of lactate transport. This review discusses the structure and function of MCTs, their participation in cancer, and old and newly developed inhibitors. Some suggestions on how to improve their anticancer effects are also discussed.
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Affiliation(s)
- Tomas Koltai
- Hospital del Centro Gallego de Buenos Aires, Buenos Aires 2199, Argentina
| | - Larry Fliegel
- Department of Biochemistry, Faculty of Medicine, University of Alberta, Edmonton T6G 2R3, Alberta, Canada
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Wei H, Cao J, Fallert T, Yeo S, Felmlee MA. GHB toxicokinetics and renal monocarboxylate transporter expression are influenced by the estrus cycle in rats. BMC Pharmacol Toxicol 2023; 24:58. [PMID: 37919807 PMCID: PMC10623699 DOI: 10.1186/s40360-023-00700-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 10/30/2023] [Indexed: 11/04/2023] Open
Abstract
BACKGROUND The illicit use and abuse of gamma-hydroxybutyric acid (GHB) occurs due to its sedative/hypnotic and euphoric effects. Currently, there are no clinically available therapies to treat GHB overdose, and care focuses on symptom treatment until the drug is eliminated from the body. Proton- and sodium-dependent monocarboxylate transporters (MCTs (SLC16A) and SMCTs (SLC5A)) transport and mediate the renal clearance and distribution of GHB. Previously, it has been shown that MCT expression is regulated by sex hormones in the liver, skeletal muscle and Sertoli cells. The focus of the current study is to evaluate GHB toxicokinetics and renal monocarboxylate transporter expression over the estrus cycle in females, and in the absence of male and female sex hormones. METHODS GHB toxicokinetics and renal transporter expression of MCT1, SMCT1 and CD147 were evaluated in females over the estrus cycle, and in ovariectomized (OVX) female, male and castrated (CST) male rats. GHB was administered iv bolus (600 and 1000 mg/kg) and plasma and urine samples were collected for six hours post-dose. GHB concentrations were quantified using a validated LC/MS/MS assay. Transporter mRNA and protein expression was quantified by qPCR and Western Blot. RESULTS GHB renal clearance and AUC varied between sexes and over the estrus cycle in females with higher renal clearance and a lower AUC in proestrus females as compared to males (intact and CST), and OVX females. We demonstrated that renal MCT1 membrane expression varies over the estrus cycle, with the lowest expression observed in proestrus females, which is consistent with the observed changes in GHB renal clearance. CONCLUSIONS Our results suggest that females may be less susceptible to GHB-induced toxicity due to decreased exposure resulting from increased renal clearance, as a result of decreased renal MCT1 expression.
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Affiliation(s)
- Hao Wei
- Department of Pharmaceutics and Medicinal Chemistry, Thomas J Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, CA, 95211, USA
| | - Jieyun Cao
- Department of Pharmaceutics and Medicinal Chemistry, Thomas J Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, CA, 95211, USA
- AstraZeneca, Gaithersburg, Maryland, USA
| | - Tyler Fallert
- Department of Pharmaceutics and Medicinal Chemistry, Thomas J Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, CA, 95211, USA
- Clovis Community Medical Center, Clovis, CA, USA
| | - Su Yeo
- Department of Pharmaceutics and Medicinal Chemistry, Thomas J Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, CA, 95211, USA
- Kaiser Permanente, Santa Clara, CA, USA
| | - Melanie A Felmlee
- Department of Pharmaceutics and Medicinal Chemistry, Thomas J Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, CA, 95211, USA.
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Gao C, Yang B, Li Y, Pei W. Monocarboxylate transporter-dependent mechanism is involved in the adaptability of the body to exercise-induced fatigue under high-altitude hypoxia environment. Brain Res Bull 2023; 195:78-85. [PMID: 36804772 DOI: 10.1016/j.brainresbull.2023.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/28/2023] [Accepted: 02/14/2023] [Indexed: 02/17/2023]
Abstract
Under high-altitude hypoxia environment, the body is more prone to fatigue, which occurs in both peripheral muscles and the central nervous system (CNS). The key factor determining the latter is the imbalance of brain energy metabolism, which makes it difficult to maintain the central nervous system to send peripheral nerve impulse continuously. During strenuous exercise, lactate released from astrocytes is taken up by neurons stored for energy to maintain synaptic transmission, a process mediated by monocarboxylate transporters (MCTs) in CNS. The present study investigated the correlation among the adaptability to exercise-induced fatigue, brain lactate metabolism and neuronal hypoxia injury under high-altitude hypoxia environment. Rats were subjected to exhaustive incremental load treadmill exercise under either normal pressure and normoxic conditions or simulated high-altitude low pressure and hypoxic conditions, with subsequent evaluation of the average exhaustive time as well as the expression of monocarboxylate transporters 2 (MCT2), MCT4, the average neuronal density in the cerebral motor cortex, and the lactate content in rat brain. At the early stage of simulated high-altitude environment, the average exhaustive time and neuronal density of rats decreased rapidly, then gradually recovered to some extent with the extension of altitude acclimatization time. The expression of MCT2, MCT4 and the lactate content in rat brain also increased gradually with the extension of altitude acclimatization time. After the application of lactate transport inhibitor, the recovery of exercise capacity of rats after altitude acclimatization was quickly blocked, and the neuronal injury in the cerebral motor cortex of rats was also significantly aggravated. These findings demonstrate that MCT-dependent mechanism is involved in the adaptability of the body to central fatigue, and provide a potential basis for medical intervention for exercise-induced fatigue under high-altitude hypoxia environment.
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Affiliation(s)
- Chen Gao
- Department of General Practice, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou 730050, China.
| | - Binni Yang
- Department of General Practice, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou 730050, China
| | - Yurong Li
- Department of General Practice, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou 730050, China
| | - Wenjuan Pei
- Department of General Practice, The 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Army, Lanzhou 730050, China
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Afonso J, Barbosa A, Aguiar Pastrez PR, Bonatelli M, Alves da Costa RF, Pinheiro C, Longatto-Filho A, Baltazar F. Clinical and Prognostic Impact of the Warburg Effect in Esophageal Carcinoma: Monocarboxylate Transporters as Candidates for Therapeutic Targeting. Pathobiology 2023; 90:251-269. [PMID: 36724756 DOI: 10.1159/000528562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 12/02/2022] [Indexed: 02/03/2023] Open
Abstract
INTRODUCTION Esophageal cancer (EC) seems to display increased glycolytic activity, but clinical studies on the expression/prognostic significance of glycometabolism-related proteins, as well as functional assays, are missing. METHODS Expression of 10 glycolytic biomarkers was evaluated by immunohistochemistry in tissue sections from 95 patients. Two esophageal squamous cell carcinoma (ESCC) cell lines were used to assess the effect of monocarboxylate transporter (MCT) downregulation on cell viability and extracellular lactate/glucose accumulation. RESULTS Expression of MCT1, MCT4, CD147, and GLUT1 was significantly associated with an ESCC histopathology, while a poor clinicopathological profile was seen in GLUT1- and LDHA-positive EC cases. In the ESCC group, MCT1 immunoreactivity is associated with high TNM stage and metastasis. The 3-year overall survival (OS) rate was significantly influenced by MCT4 and CAIX positivity and HKII negativity. Those biomarkers were considered independent prognostic factors of OS in multivariate analysis. Dual inhibition of MCT1/4 expression decreased cell viability and extracellular lactate accumulation in ESCC cells. CONCLUSION Elevated glycolytic rates correlate with a poor clinicopathological profile in EC patients. MCT4 and CAIX positivity independently predict a worse prognosis. Due to the lack of information on treatment modalities, we could not further infer the role of these biomarkers in predicting response to therapy, which needs to be assessed in future studies. In addition, MCT1/4 targeting should be performed both "in vitro" and "in vivo" to further explore its impact on tumor growth and response to classical therapies. HKII expression and function, particularly in the tumor stroma, should be investigated.
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Affiliation(s)
- Julieta Afonso
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal,
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal,
| | - Andreia Barbosa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | | | - Murilo Bonatelli
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
| | - Ricardo Filipe Alves da Costa
- Educational and Research Institute, Barretos Cancer Hospital, Barretos, Brazil
- Barretos School of Health Sciences Dr. Paulo Prata - FACISB, Barretos, Brazil
| | - Céline Pinheiro
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
- Barretos School of Health Sciences Dr. Paulo Prata - FACISB, Barretos, Brazil
| | - Adhemar Longatto-Filho
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
- Laboratory of Medical Investigation (LIM 14), Faculty of Medicine, São Paulo State University, São Paulo, Brazil
| | - Fátima Baltazar
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
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Abstract
Tumor development is influenced by circulating metabolites and most tumors are exposed to substantially elevated levels of lactic acid and low levels of nutrients, such as glucose and glutamine. Tumor-derived lactic acid, the major circulating carbon metabolite, regulates energy metabolism and cancer cell signaling pathways, while also acting as an energy source and signaling molecule. Recent studies have yielded new insights into the pro-tumorigenic action of lactic acid and its metabolism. These insights suggest an anti-tumor therapeutic strategy targeting the oncometabolite lactic acid, with the aim of improving the efficacy and clinical safety of tumor metabolism inhibitors. This review describes the current understanding of the multifunctional roles of tumor lactic acid, as well as therapeutic approaches targeting lactic acid metabolism, including lactate dehydrogenase and monocarboxylate transporters, for anti-cancer therapy.
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Calbiague García V, Chen Y, Cádiz B, Wang L, Paquet-Durand F, Schmachtenberg O. Imaging of lactate metabolism in retinal Müller cells with a FRET nanosensor. Exp Eye Res 2023; 226:109352. [PMID: 36528083 DOI: 10.1016/j.exer.2022.109352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/30/2022] [Accepted: 12/12/2022] [Indexed: 12/15/2022]
Abstract
Müller cells, the glial cells of the retina, provide metabolic support for photoreceptors and inner retinal neurons, and have been proposed as source of the significant lactate production of this tissue. To better understand the role of lactate in retinal metabolism, we expressed a lactate and a glucose nanosensor in organotypic mouse retinal explants cultured for 14 days, and used FRET imaging in acute vibratome sections of the explants to study metabolite flux in real time. Pharmacological manipulation with specific monocarboxylate transporter (MCT) inhibitors and immunohistochemistry revealed the functional expression of MCT1, MCT2 and MCT4 in Müller cells of retinal explants. The introduction of FRET nanosensors to measure key metabolites at the cellular level may contribute to a better understanding of heretofore poorly understood issues in retinal metabolism.
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Affiliation(s)
- Víctor Calbiague García
- PhD Program in Neuroscience, Universidad de Valparaíso, Valparaíso, Chile; CINV, Instituto de Biología, Universidad de Valparaíso, Chile
| | - Yiyi Chen
- Institute for Ophthalmic Research, University of Tübingen, Germany
| | - Bárbara Cádiz
- CINV, Instituto de Biología, Universidad de Valparaíso, Chile
| | - Lan Wang
- Institute for Ophthalmic Research, University of Tübingen, Germany
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Granja SC, Longatto-Filho A, de Campos PB, Oliveira CP, Stefano JT, Martins-Filho SN, Chagas AL, Herman P, D'Albuquerque LC, Reis Alvares-da-Silva M, Carrilho FJ, Baltazar F, Alves VAF. Non-Alcoholic Fatty Liver Disease-Related Hepatocellular Carcinoma: Immunohistochemical Assessment of Markers of Cancer Cell Metabolism. Pathobiology 2022; 89:157-165. [PMID: 35042213 DOI: 10.1159/000521034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 11/17/2021] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Hepatocellular carcinoma (HCC) has been associated to non-alcoholic fatty liver disease (NAFLD). We sought to investigate the immunoexpression of several glycolytic metabolism-associated markers in patients with HCC associated to NAFLD and associate these factors to their clinical-pathological characteristics. METHODS We evaluated 35 HCC specimens from 21 patients diagnosed with non-alcoholic steatohepatitis (NASH) undergoing liver resection (12 patients), liver transplantation (8 patients), or both (1 patient). Histological features, clinical aspects, demographic and biochemical data, as well as the immunohistochemical reactivity for monocarboxylate transporters 1, 2, and 4; their chaperone CD147; carbonic anhydrase IX; and glucose transporter-1 (GLUT1) were assessed. RESULTS Metabolic-associated cirrhosis was present in 12 of the 21 patients (8 child A and 4 child B scores). From 9 patients without cirrhosis, 3 presented NASH F3 and 6 NASH F2. Sixteen (76%) had diabetes mellitus, 17 (81%) arterial hypertension, and 19 (90%) body mass index above 25 kg/m2; 8 (38%) had dyslipidemia. From 35 nodules, steatosis was found in 26, ballooning in 31 nodules, 25 of them diagnosed as steatohepatitic subtype of HCC. MCT4 immunoexpression was associated with extensive intratumoral fibrosis, advanced clinical stages, and shorter overall survival. GLUT1 was noticeable in nodules with extensive intratumoral steatosis, higher intratumoral fibrosis, and advanced clinical stages. Immunohistochemical expression of the metabolic biomarkers MCT4 and GLUT1 was higher in patients with Barcelona-clinic liver cancer B or C. GLUT1 correlated with higher degree of steatosis, marked ballooning, intratumoral fibrosis, and higher parenchymal necroinflammatory activity. CONCLUSION Our data indicate that the expression of the glycolytic phenotype of metabolic markers, especially GLUT1 and MCT4, correlates with a more severe course of HCC occurring in NASH patients.
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Affiliation(s)
- Sara Costa Granja
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.,Research Centre in Health and Environment (CISA), School of Health (ESS), Polytechnic Institute of Porto (P.PORTO), Porto, Portugal.,Department of Pathological, Cytological and Thanatological Anatomy, ESS
- P.PORTO, Porto, Portugal
| | - Adhemar Longatto-Filho
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.,Department of Pathology (LIM-14), University of São Paulo School of Medicine, São Paulo, Brazil.,Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Brazil
| | - Priscila B de Campos
- Department of Gastroenterology (LIM-07/ 37), University of São Paulo School of Medicine, São Paulo, Brazil
| | - Claudia P Oliveira
- Department of Gastroenterology (LIM-07/ 37), University of São Paulo School of Medicine, São Paulo, Brazil
| | - José T Stefano
- Department of Gastroenterology (LIM-07/ 37), University of São Paulo School of Medicine, São Paulo, Brazil
| | | | - Aline L Chagas
- Department of Gastroenterology (LIM-07/ 37), University of São Paulo School of Medicine, São Paulo, Brazil
| | - Paulo Herman
- Department of Gastroenterology (LIM-07/ 37), University of São Paulo School of Medicine, São Paulo, Brazil
| | - Luiz C D'Albuquerque
- Department of Gastroenterology (LIM-07/ 37), University of São Paulo School of Medicine, São Paulo, Brazil
| | - Mário Reis Alvares-da-Silva
- Division of Gastroenterology, Hospital de Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Flair José Carrilho
- Department of Gastroenterology (LIM-07/ 37), University of São Paulo School of Medicine, São Paulo, Brazil
| | - Fátima Baltazar
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Venâncio A F Alves
- Department of Pathology (LIM-14), University of São Paulo School of Medicine, São Paulo, Brazil
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Massidda M, Flore L, Kikuchi N, Scorcu M, Piras F, Cugia P, Cięszczyk P, Tocco F, Calò CM. Influence of the MCT1-T1470A polymorphism (rs1049434) on repeated sprint ability and blood lactate accumulation in elite football players: a pilot study. Eur J Appl Physiol 2021; 121:3399-3408. [PMID: 34480633 DOI: 10.1007/s00421-021-04797-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 08/17/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE The aim of this study is to investigate the influence of the MCT1 T1470A polymorphism (rs1049434) on repeated sprint ability (RSA) and lactate accumulation after RSA testing. METHODS Twenty-six elite Italian male football players (age: 17.7 ± 0.78 years; height: 179.2 ± 7.40 cm; weight: 72.1 ± 5.38 kg) performed RSA testing (6 × 30-m sprints with an active recovery between sprints), and lactate measurements were obtained at 1, 3, 5, 7, and 10 min post-exercise. Genotyping for the MCT1 T1470A polymorphism was performed using PCR. RESULTS Genotype distributions were in Hardy-Weinberg equilibrium, being 42% wildtype (A/A), 46% heterozygotes (T/A), and 12% mutated homozygotes (T/T). Significant differences between genotypic groups were found in the two final sprint times of the RSA test. Under a dominant model, carriers of the major A-allele (Glu-490) in the dominant model showed a significantly lower sprint time compared to footballers with the T/T (Asp/Asp) genotype (5th Sprint time: A/A + T/A = 4.60 s vs TT = 4.97 s, 95% CI 0.07-0.67, p = 0.022; 6th Sprint: A/A + T/A = 4.56 s vs T/T = 4.87 s, 95% CI 0.05-0.57, p = 0.033). CONCLUSIONS The T1470A (Glu490Asp) polymorphism of MCT1 was associated with RSA. Our findings suggest that the presence of the major A-allele (Glu-490) is favourable for RSA in football players.
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Affiliation(s)
- M Massidda
- Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy.
- Italian Federation of Sports Medicine Federation (FMSI), Rome, Italy.
- Faculty of Medicine and Surgery, Sport and Exercise Science Degree Courses, University of Cagliari, Cagliari, Italy.
| | - L Flore
- Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
| | - N Kikuchi
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - M Scorcu
- Italian Federation of Sports Medicine Federation (FMSI), Rome, Italy
- Cagliari Calcio Spa, Cagliari, Italy
| | - F Piras
- Italian Federation of Sports Medicine Federation (FMSI), Rome, Italy
- Cagliari Calcio Spa, Cagliari, Italy
| | - P Cugia
- Italian Federation of Sports Medicine Federation (FMSI), Rome, Italy
- Cagliari Calcio Spa, Cagliari, Italy
| | - P Cięszczyk
- Department of Physical Education, University of Physical Education and Sport, Gdańsk, Poland
| | - F Tocco
- Department of Medical Sciences and Public Health, University of Cagliari, Cagliari, Italy
| | - C M Calò
- Department of Life and Environmental Sciences, University of Cagliari, Cagliari, Italy
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Wang ZH, Peng WB, Zhang P, Yang XP, Zhou Q. Lactate in the tumour microenvironment: From immune modulation to therapy. EBioMedicine 2021; 73:103627. [PMID: 34656878 PMCID: PMC8524104 DOI: 10.1016/j.ebiom.2021.103627] [Citation(s) in RCA: 115] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 12/18/2022] Open
Abstract
Disordered metabolic states, which are characterised by hypoxia and elevated levels of metabolites, particularly lactate, contribute to the immunosuppression in the tumour microenvironment (TME). Excessive lactate secreted by metabolism-reprogrammed cancer cells regulates immune responses via causing extracellular acidification, acting as an energy source by shuttling between different cell populations, and inhibiting the mechanistic (previously ‘mammalian’) target of rapamycin (mTOR) pathway in immune cells. This review focuses on recent advances in the regulation of immune responses by lactate, as well as therapeutic strategies targeting lactate anabolism and transport in the TME, such as those involving glycolytic enzymes and monocarboxylate transporter inhibitors. Considering the multifaceted roles of lactate in cancer metabolism, a comprehensive understanding of how lactate and lactate-targeting therapies regulate immune responses in the TME will provide insights into the complex relationships between metabolism and antitumour immunity.
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Affiliation(s)
- Zi-Hao Wang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wen-Bei Peng
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Pei Zhang
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiang-Ping Yang
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Qiong Zhou
- Department of Respiratory and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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10
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Boedtkjer E. Ion Channels, Transporters, and Sensors Interact with the Acidic Tumor Microenvironment to Modify Cancer Progression. Rev Physiol Biochem Pharmacol 2021. [PMID: 34291319 DOI: 10.1007/112_2021_63] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Solid tumors, including breast carcinomas, are heterogeneous but typically characterized by elevated cellular turnover and metabolism, diffusion limitations based on the complex tumor architecture, and abnormal intra- and extracellular ion compositions particularly as regards acid-base equivalents. Carcinogenesis-related alterations in expression and function of ion channels and transporters, cellular energy levels, and organellar H+ sequestration further modify the acid-base composition within tumors and influence cancer cell functions, including cell proliferation, migration, and survival. Cancer cells defend their cytosolic pH and HCO3- concentrations better than normal cells when challenged with the marked deviations in extracellular H+, HCO3-, and lactate concentrations typical of the tumor microenvironment. Ionic gradients determine the driving forces for ion transporters and channels and influence the membrane potential. Cancer and stromal cells also sense abnormal ion concentrations via intra- and extracellular receptors that modify cancer progression and prognosis. With emphasis on breast cancer, the current review first addresses the altered ion composition and the changes in expression and functional activity of ion channels and transporters in solid cancer tissue. It then discusses how ion channels, transporters, and cellular sensors under influence of the acidic tumor microenvironment shape cancer development and progression and affect the potential of cancer therapies.
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Sohrabi E, Moslemi M, Rezaie E, Nafissi N, Khaledi M, Afkhami H, Fathi J, Zekri A. The tissue expression of MCT3, MCT8, and MCT9 genes in women with breast cancer. Genes Genomics 2021; 43:1065-77. [PMID: 34097251 DOI: 10.1007/s13258-021-01116-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Accepted: 05/27/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Breast cancer (BC) is a common malignancy with a high mortality rate. Malignant cell transformation is associated with metabolic changes. One group of proteins that are affected is the monocarboxylate transporters (MCTs-SLC16A). The MCTs comprise 14 members, and they play an important role in the growth, proliferation, and metabolism of cancer cells by transporting monocarboxylates such as lactate, pyruvate and thyroid hormones. OBJECTIVE We aimed to evaluate the expression of MCT3 (SLC16A8), MCT8 (SLC16A2) and MCT9 (SLC16A9) genes in breast cancer samples, comparing to normal adjacent tissues. METHODS Forty paired breast cancer tumor samples, the adjacent non-tumor and five healthy tissues were collected. Three cancer cell lines (MCF-7, MDA-MB-231, and SKBR3) were also analyzed. The expression of SLC16A8, SLC16A2 and SLC16A9 were assessed using quantitative real-time PCR. The relationship between gene expression with the pathological features of the tumors, and the hormone receptors status of the patient's tumors were also analyzed. RESULTS There was a significantly lower expression of the MCT3 gene in tumor samples compared to adjacent normal tissue and healthy samples (p value < 0.05). There was a significant difference in the expression of all three candidate genes between the BC tissues and normal tissues, and for the, tissues with different hormone receptor status and the molecular subtypes. Altered MCT8 and MCT9 gene expression was associated with a reduced survival CONCLUSION: MCT3 expression is significantly downregulated in breast cancer tissue. MCT3 may represent a novel therapeutic target in breast cancer patients, or in some hormone receptor subgroups.
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Chandel V, Maru S, Kumar A, Kumar A, Sharma A, Rathi B, Kumar D. Role of monocarboxylate transporters in head and neck squamous cell carcinoma. Life Sci 2021; 279:119709. [PMID: 34102188 DOI: 10.1016/j.lfs.2021.119709] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/29/2021] [Accepted: 05/29/2021] [Indexed: 11/24/2022]
Abstract
Head and Neck tumors are metabolically highly altered solid tumors. Head and Neck cancer cells may utilise different metabolic pathways for energy production. Whereas, glycolysis is the major source coupled with oxidative phosphorylation in a metabolic symbiosis manner that results in the proliferation and metastasis in Head and Neck Cancer. The monocarboxylate transporters (MCTs) constitute a family of 14 members among which MCT1-4 are responsible for transporting monocarboxylates such as l-lactate and pyruvate, and ketone bodies across the plasma membrane. Additionally, MCTs mediate absorption and distribution of monocarboxylates across the cell membrane. Head and Neck cancer cells are highly glycolytic in nature and generate significant amount of lactic acid in the extracellular environment. In such condition, MCTs play a critical role in the regulation of pH, and lactate shuttle maintenance. The intracellular lactate accumulation is harmful for the cells since it drastically lowers the intracellular pH. MCTs facilitate the export of lactate out of the cell. The lactate export mediated by MCTs is crucial for the cancer cells survival. Therefore, targeting MCTs is important and could be a potential therapeutic approach to control growth of the tumor.
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Affiliation(s)
- Vaishali Chandel
- Amity Institute of Molecular Medicine & Stem Cell Research (AIMMSCR), Amity University Uttar Pradesh, Sec-125, Noida 201313, UP, India
| | - Saurabh Maru
- School of Pharmacy and Technology Management, SVKM'S NMIMS Deemed to be University, Shirpur, Maharashtra, India
| | - Arun Kumar
- Mahavir Cancer Institute & Research Centre, Phulwarisharif, Patna 801505, Bihar, India
| | - Ashok Kumar
- Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), Bhopal, Saket Nagar, Bhopal 462 020, Madhya Pradesh, India
| | - Ashok Sharma
- Department of Biochemistry, All India Institute of Medical Sciences (AIIMS), Ansari Nagar, New Delhi 110029, Bharat, India
| | - Brijesh Rathi
- Laboratory for Translational Chemistry and Drug Discovery, Department of Chemistry, Hansraj College, University of Delhi, Delhi, India; Laboratory of Computational Modelling of Drugs, South Ural State University, Chelyabinsk, Russia
| | - Dhruv Kumar
- Amity Institute of Molecular Medicine & Stem Cell Research (AIMMSCR), Amity University Uttar Pradesh, Sec-125, Noida 201313, UP, India.
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Ahmadi A, Sheikholeslami-Vatani D, Ghaeeni S, Baazm M. The effects of different training modalities on monocarboxylate transporters MCT1 and MCT4, hypoxia inducible factor-1α (HIF-1α), and PGC-1α gene expression in rat skeletal muscles. Mol Biol Rep 2021; 48:2153-2161. [PMID: 33625690 DOI: 10.1007/s11033-021-06224-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 02/09/2021] [Indexed: 01/26/2023]
Abstract
The research literature suggests that different training modalities cause various patterns in training-induced genes expression. This study aimed to investigate the effects of moderate intensity continuous training (MICT) and isocaloric high intensity interval training (HIIT) on gene expression of monocarboxylate transporter 1 (MCT1) and 4 (MCT4), Peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), and hypoxia inducible factor-1α (HIF-1α) in soleus and extensor digitorum longus (EDL) skeletal muscles of rats. Thirty male Sprague-Dawley rats were divided into 3 groups of control, MICT, and HIIT. Training protocols were performed according to the principle of overload for 8 weeks and 5 sessions per week. Then, the soleus and EDL muscles were extracted and the expression levels were analyzed using the real time PCR method. In the MICT group, only the EDL HIF-1α mRNA level was significantly higher than that of the control group (p < 0.05). In the HIIT group, however, mRNA levels of MCT4, PGC-1α, and HIF-1α in both muscles were significantly higher than those of the control group (p < 0.05). The comparison between the two training methods demonstrated that the gene expression levels of soleus and EDL MCT4, soleus PGC-1α, and soleus HIF-1α were significantly higher in the HIIT group compared to the MICT group (p < 0.05). There were also significant positive correlations between all mRNA levels of HIF-1α and corresponding mRNA levels of MCT4 (p < 0.05). HIIT caused greater positive responses in the gene expression of MCT4, PGC-1α, and HIF-1α compared to MICT.
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Affiliation(s)
- Akbar Ahmadi
- Department of Physical Education and Sport Sciences, University of Kurdistan, 66177-15175, Sanandaj, Iran
| | | | - Saeed Ghaeeni
- Department of Physical Education and Sport Sciences, University of Kurdistan, 66177-15175, Sanandaj, Iran
| | - Maryam Baazm
- Department of Anatomy, School of Medicine, Arak University of Medical Sciences, Arak, Iran
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Elingaard-Larsen LO, Rolver MG, Sørensen EE, Pedersen SF. How Reciprocal Interactions Between the Tumor Microenvironment and Ion Transport Proteins Drive Cancer Progression. Rev Physiol Biochem Pharmacol 2020; 182:1-38. [PMID: 32737753 DOI: 10.1007/112_2020_23] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Solid tumors comprise two major components: the cancer cells and the tumor stroma. The stroma is a mixture of cellular and acellular components including fibroblasts, mesenchymal and cancer stem cells, endothelial cells, immune cells, extracellular matrix, and tumor interstitial fluid. The insufficient tumor perfusion and the highly proliferative state and dysregulated metabolism of the cancer cells collectively create a physicochemical microenvironment characterized by altered nutrient concentrations and varying degrees of hypoxia and acidosis. Furthermore, both cancer and stromal cells secrete numerous growth factors, cytokines, and extracellular matrix proteins which further shape the tumor microenvironment (TME), favoring cancer progression.Transport proteins expressed by cancer and stromal cells localize at the interface between the cells and the TME and are in a reciprocal relationship with it, as both sensors and modulators of TME properties. It has been amply demonstrated how acid-base and nutrient transporters of cancer cells enable their growth, presumably by contributing both to the extracellular acidosis and the exchange of metabolic substrates and waste products between cells and TME. However, the TME also impacts other transport proteins important for cancer progression, such as multidrug resistance proteins. In this review, we summarize current knowledge of the cellular and acellular components of solid tumors and their interrelationship with key ion transport proteins. We focus in particular on acid-base transport proteins with known or proposed roles in cancer development, and we discuss their relevance for novel therapeutic strategies.
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Affiliation(s)
- Line O Elingaard-Larsen
- Translational Type 2 Diabetes Research, Department of Clinical Research, Steno Diabetes Center Copenhagen, Gentofte, Denmark
| | - Michala G Rolver
- Section for Cell Biology and Physiology, Department of Biology, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Ester E Sørensen
- Section for Cell Biology and Physiology, Department of Biology, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Stine F Pedersen
- Section for Cell Biology and Physiology, Department of Biology, Faculty of Science, University of Copenhagen, Copenhagen, Denmark.
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Pereira-Nunes A, Afonso J, Granja S, Baltazar F. Lactate and Lactate Transporters as Key Players in the Maintenance of the Warburg Effect. Adv Exp Med Biol 2020; 1219:51-74. [PMID: 32130693 DOI: 10.1007/978-3-030-34025-4_3] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Reprogramming of energy metabolism is a key hallmark of cancer. Most cancer cells display a glycolytic phenotype, with increased glucose consumption and glycolysis rates, and production of lactate as the end product, independently of oxygen concentrations. This phenomenon, known as "Warburg Effect", provides several survival advantages to cancer cells and modulates the metabolism and function of neighbour cells in the tumour microenvironment. However, due to the presence of metabolic heterogeneity within a tumour, cancer cells can also display an oxidative phenotype, and corruptible cells from the microenvironment become glycolytic, cooperating with oxidative cancer cells to boost tumour growth. This phenomenon is known as "Reverse Warburg Effect". In either way, lactate is a key mediator in the metabolic crosstalk between cancer cells and the microenvironment, and lactate transporters are expressed differentially by existing cell populations, to support this crosstalk.In this review, we will focus on lactate and on lactate transporters in distinct cells of the tumour microenvironment, aiming at a better understanding of their role in the acquisition and maintenance of the direct/reverse "Warburg effect" phenotype, which modulate cancer progression.
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Affiliation(s)
- Andreia Pereira-Nunes
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Julieta Afonso
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Sara Granja
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Fátima Baltazar
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.
- ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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16
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Tanaka N, Yamaguchi H, Mano N. Involvement of H +-gradient dependent transporter in PGE 2 release from A549 cells. Prostaglandins Leukot Essent Fatty Acids 2019; 149:30-36. [PMID: 31421525 DOI: 10.1016/j.plefa.2019.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 07/18/2019] [Accepted: 08/07/2019] [Indexed: 11/24/2022]
Abstract
The purpose of this study was to identify the transporter involved in the release of prostaglandin E2 (PGE2). In the present study, transport assays were conducted using membrane vesicles prepared from human lung adenocarcinoma A549 cells, thus enabling identification of the novel exporter present in A549 cells. PGE2 transport into A549 vesicles was higher in the presence of a proton (H+)-gradient, thus suggesting the involvement of PGE2H+ symporter in PGE2 transport. Results from our experiments showed enhanced PGE2 release in A549 cells in the presence of H+-gradient ([H+]extracellular < [H+]intracellular). Moreover, in vesicular transport assays, H+-gradient-dependent transport of PGE2 did not show saturation up to 500 μM PGE2, and 10 mM aromatic monocarboxylic acids (acetylsalicylic acid, salicylic acid, and p-nitrobenzoic acid) significantly inhibited PGE2 transport by 62-70%. These results suggest, the involvement of monocarboxylate transporters in the H+-gradient-dependent PGE2 export.
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Affiliation(s)
- Nobuaki Tanaka
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, 980-8578, Japan
| | - Hiroaki Yamaguchi
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, 980-8578, Japan; Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Miyagi, 980-8574, Japa; Yamagata University Graduate School of Medicine/Department of Pharmacy, Yamagata University Hospital, 2-2-2, Iida-nishi, Yamagata, 990-9585, Japan.
| | - Nariyasu Mano
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, 980-8578, Japan; Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Miyagi, 980-8574, Japa
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17
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Gao C, Li Z, Bai J, Wang R, Gao L. Involvement of monocarboxylate transporters in the cross-tolerance between epilepsy and cerebral infarction: A promising choice towards new treatments. Neurosci Lett 2019; 707:134305. [PMID: 31152852 DOI: 10.1016/j.neulet.2019.134305] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 04/29/2019] [Accepted: 05/28/2019] [Indexed: 12/17/2022]
Abstract
Noxious stimuli applied at doses close to but below the threshold of cell injury induce adaptative responses that provide a defense against additional stress from the same (tolerance) or other (cross-tolerance) stimuli. Such endogenous modulators mediate the tolerance induced by numerous sublethal physical and chemical stress factors, of which epileptic preconditioning (EPC) and mild global ischemia are two most important mutually protective actions. However, the evidence for the complicated underlying mechanisms involved in this neuroprotective effects are lacking. During hypoxia/ischemia (H/I) and intense neural activity, lactate released from astrocytes is taken up by neurons and is stored for energy, a process mediated by monocarboxylate transporters (MCTs) in central nervous system (CNS). The present study investigated whether ischemic preconditioning (IPC) or EPC can provide protection to CNS against epilepsy or cerebral infarction respectively through regulation of MCTs expression in vivo. Rats were subjected to transitory middle cerebral artery occlusion (MCAO) or kainic acid (KA) preconditioning protocol respectively, followed by KA induced epilepsy or lethal MCAO as well as lactate transportation inhibitor injection, with a subsequent evaluation of behavior and infarct volume as well as MCTs expression in rats brain. IPC reduced the severity of status epilepticus induced by KA injection and EPC reduce infarct volume resulted from lethal MCAO. However, lactate transport blocking attenuated this neuroprotective effect and MCTs expression followed the same variation trends. These findings demonstrate that MCTs dependent mechanism is involved in the cross-tolerance between epilepsy and cerebral infarction, provide a potential basis for the clinical treatment of patients with brain diseases characterized by epilepsy and H/I.
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18
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Golubczyk D, Malysz-Cymborska I, Kalkowski L, Janowski M, Coates JR, Wojtkiewicz J, Maksymowicz W, Walczak P. The Role of Glia in Canine Degenerative Myelopathy: Relevance to Human Amyotrophic Lateral Sclerosis. Mol Neurobiol 2019; 56:5740-5748. [PMID: 30674036 PMCID: PMC6614142 DOI: 10.1007/s12035-019-1488-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/10/2019] [Indexed: 11/30/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease characterized by progressive degeneration of motor neurons and grim prognosis. Over the last decade, studies on neurodegenerative diseases pointed on the role of glia in supporting the proper function of neurons. Particularly, oligodendrocytes were shown to be essential through myelin production and supplying axons with energy metabolites via monocarboxylate transporters (MCT). We have used dogs with naturally occurring degenerative myelopathy (DM) which closely resembles features observed in human ALS. We have performed two types of analysis of spinal cord tissue samples: histology and molecular analysis. Histology included samples collected from dogs that succumbed to the DM at different disease stages, which were compared to age-matched controls as well as put in the context of young spinal cords. Molecular analysis was performed on spinal cords with advanced DM and age-matched samples and included real-time PCR analysis of selected gene products related to the function of neurons, oligodendrocytes, myelin, and MCT. Demyelination has been detected in dogs with DM through loss of eriochrome staining and decreased expression of genes related to myelin including MBP, Olig1, and Olig2. The prominent reduction of MCT1 and MCT2 and increased MCT4 expression is indicative of disturbed energy supply to neurons. While Rbfox3 expression was not altered, the ChAT production was negatively affected. DM in dogs reproduces main features of human ALS including loss of motor neurons, dysregulation of energy supply to neurons, and loss of myelin, and as such is an ideal model system for highly translational studies on therapeutic approaches for ALS.
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Affiliation(s)
- Dominika Golubczyk
- Department of Neurosurgery, School of Medicine, University of Warmia and Mazury, Olsztyn, Poland
| | - Izabela Malysz-Cymborska
- Department of Neurosurgery, School of Medicine, University of Warmia and Mazury, Olsztyn, Poland
| | - Lukasz Kalkowski
- Department of Neurosurgery, School of Medicine, University of Warmia and Mazury, Olsztyn, Poland
| | - Miroslaw Janowski
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD, USA.,Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, Johns Hopkins University, Baltimore, MD, USA.,Department of NeuroRepair, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
| | - Joan R Coates
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, MO, USA
| | - Joanna Wojtkiewicz
- Department of Pathophysiology, School of Medicine, University of Warmia and Mazury, Olsztyn, Poland
| | - Wojciech Maksymowicz
- Department of Neurosurgery, School of Medicine, University of Warmia and Mazury, Olsztyn, Poland
| | - Piotr Walczak
- Department of Neurosurgery, School of Medicine, University of Warmia and Mazury, Olsztyn, Poland. .,Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD, USA. .,Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, Johns Hopkins University, Baltimore, MD, USA.
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Jha MK, Morrison BM. Glia-neuron energy metabolism in health and diseases: New insights into the role of nervous system metabolic transporters. Exp Neurol 2018; 309:23-31. [PMID: 30044944 DOI: 10.1016/j.expneurol.2018.07.009] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 07/19/2018] [Accepted: 07/20/2018] [Indexed: 12/16/2022]
Abstract
The brain is, by weight, only 2% the volume of the body and yet it consumes about 20% of the total glucose, suggesting that the energy requirements of the brain are high and that glucose is the primary energy source for the nervous system. Due to this dependence on glucose, brain physiology critically depends on the tight regulation of glucose transport and its metabolism. Glucose transporters ensure efficient glucose uptake by neural cells and contribute to the physiology and pathology of the nervous system. Despite this, a growing body of evidence demonstrates that for the maintenance of several neuronal functions, lactate, rather than glucose, is the preferred energy metabolite in the nervous system. Monocarboxylate transporters play a crucial role in providing metabolic support to axons by functioning as the principal transporters for lactate in the nervous system. Monocarboxylate transporters are also critical for axonal myelination and regeneration. Most importantly, recent studies have demonstrated the central role of glial cells in brain energy metabolism. A close and regulated metabolic conversation between neurons and both astrocytes and oligodendroglia in the central nervous system, or Schwann cells in the peripheral nervous system, has recently been shown to be an important determinant of the metabolism and function of the nervous system. This article reviews the current understanding of the long existing controversies regarding energy substrate and utilization in the nervous system and discusses the role of metabolic transporters in health and diseases of the nervous system.
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Affiliation(s)
- Mithilesh Kumar Jha
- Department of Neurology, The Johns Hopkins University, Baltimore, MD 21205, United States
| | - Brett M Morrison
- Department of Neurology, The Johns Hopkins University, Baltimore, MD 21205, United States.
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Li Z, Wu Q, Sun S, Wu J, Li J, Zhang Y, Wang C, Yuan J, Sun S. Monocarboxylate transporters in breast cancer and adipose tissue are novel biomarkers and potential therapeutic targets. Biochem Biophys Res Commun 2018; 501:962-967. [PMID: 29775610 DOI: 10.1016/j.bbrc.2018.05.091] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 05/14/2018] [Indexed: 01/08/2023]
Abstract
Monocarboxylate transporters (MCTs) are transmembrane proteins that control the lactate metabolism and associated with poor prognosis in solid tumours including breast cancer (BC). This study aimed to evaluate the clinical and prognostic value of MCTs used by immunohistochemistry and quantum dots-based fluorescent imaging technique in BC and surrounding stroma with emphasis on the interaction between tumour and stroma. Moreover, the data from The Cancer Genome Atlas (TCGA) was analyzed to evaluate the association between MCTs mRNA expression and prognosis of breast cancer patients. Our study found that MCT1 overexpression was observed in hormone receptor-negative and high-proliferation subtypes. High expression of MCT1 and MCT4 in tumour tissues was associated with poor patient outcome; further the correlation between MCT1 expression and poor prognosis in breast cancer was further strengthened when combined with MCT4 overexpression in the adjacent adipose tissue. These results demonstrate that MCTs tend to play a role in the aggressive BC subtypes through the dynamic interaction between breast cancer cells and adipocytes, and developing therapeutics to block this interaction will be a promising strategy in cancer therapy.
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Affiliation(s)
- Zhiyu Li
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, PR China
| | - Qi Wu
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, PR China
| | - Si Sun
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, Hubei, PR China
| | - Juan Wu
- Department of Pathology, Renmin Hospital of Wuhan University, Wuhan, Hubei, PR China
| | - Juanjuan Li
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, PR China
| | - Yimin Zhang
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, PR China
| | - Changhua Wang
- Department of Pathophysiology, Wuhan University School of Basic Medical Sciences, Wuhan, 430060, Hubei Province, PR China
| | - Jingping Yuan
- Department of Pathology, Renmin Hospital of Wuhan University, Wuhan, Hubei, PR China.
| | - Shengrong Sun
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, PR China.
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Guan X, Ruszaj D, Morris ME. Development and validation of a liquid chromatography tandem mass spectrometry assay for AZD3965 in mouse plasma and tumor tissue: Application to pharmacokinetic and breast tumor xenograft studies. J Pharm Biomed Anal 2018; 155:270-5. [PMID: 29674138 DOI: 10.1016/j.jpba.2018.03.061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/24/2018] [Accepted: 03/30/2018] [Indexed: 01/13/2023]
Abstract
AZD3965, a pyrole pyrimidine derivative, is a potent and orally bioavailable inhibitor of monocarboxylate transporter 1 (MCT1), currently in a Phase I clinical trial in UK for lymphomas and solid tumors. There is currently no published assay for AZD3965. The objectives of this study were to develop and validate a LC/MS/MS assay for quantifying AZD3965 in mouse plasma and tumor tissue. Protein precipitation with 0.1% formic acid in acetonitrile was used for sample preparation. Chromatographic separation was achieved on a C18 column followed by tandem mass spectrometry detection in multiple reaction monitoring mode with utilizing Atmospheric Pressure Chemical Ionization. AR-C155858 was used as the internal standard. The inter-day and intra-day precision and accuracy of quality control samples evaluated in plasma and tumor tissue were less than ±7% of the nominal concentrations. The extraction recovery, matrix effect and stability values were all within acceptable levels. Sample dilution integrity, accessed by diluting plasma spiked with AZD3965 10-fold with blank plasma, was 101%. The lower limit of quantification (LLOQ) and upper limit of quantification (ULOQ) were 0.15 ng/mL and 12 μg/mL, respectively, in plasma. The assay of AZD3965 in tumor tissue was also validated with good precision and accuracy. The LLOQ was 0.15 ng/mL in tumor tissue. This assay was successfully applied to pharmacokinetic and murine 4T1 breast tumor xenograft studies of AZD3965 in mice.
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Latif A, Chadwick AL, Kitson SJ, Gregson HJ, Sivalingam VN, Bolton J, McVey RJ, Roberts SA, Marshall KM, Williams KJ, Stratford IJ, Crosbie EJ. Monocarboxylate Transporter 1 (MCT1) is an independent prognostic biomarker in endometrial cancer. BMC Clin Pathol 2017; 17:27. [PMID: 29299023 PMCID: PMC5745908 DOI: 10.1186/s12907-017-0067-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 12/15/2017] [Indexed: 01/17/2023] Open
Abstract
BACKGROUND Endometrial cancer (EC) is a major health concern due to its rising incidence. Whilst early stage disease is generally cured by surgery, advanced EC has a poor prognosis with limited treatment options. Altered energy metabolism is a hallmark of malignancy. Cancer cells drive tumour growth through aerobic glycolysis and must export lactate to maintain intracellular pH. The aim of this study was to evaluate the expression of the lactate/proton monocarboxylate transporters MCT1 and MCT4 and their chaperone CD147 in EC, with the ultimate aim of directing future drug development. METHODS MCT1, MCT4 and CD147 expression was examined using immunohistochemical analysis in 90 endometrial tumours and correlated with clinico-pathological characteristics and survival outcomes. RESULTS MCT1 and MCT4 expression was observed in the cytoplasm, the plasma membrane or both locations. CD147 was detected in the plasma membrane and associated with MCT1 (p = 0.003) but not with MCT4 (p = 0.207) expression. High MCT1 expression was associated with reduced overall survival (p = 0.029) and remained statistically significant after adjustment for survival covariates (p = 0.017). CONCLUSION Our data suggest that MCT1 expression is an important marker of poor prognosis in EC. MCT1 inhibition may have potential as a treatment for advanced or recurrent EC.
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Affiliation(s)
- Ayşe Latif
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Amy L. Chadwick
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
- Gynaecological Oncology Research Group, Division of Cancer Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Level 5 – Research, St Mary’s Hospital, Oxford Road, Manchester, M13 9WL UK
| | - Sarah J. Kitson
- Gynaecological Oncology Research Group, Division of Cancer Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Level 5 – Research, St Mary’s Hospital, Oxford Road, Manchester, M13 9WL UK
| | - Hannah J. Gregson
- Gynaecological Oncology Research Group, Division of Cancer Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Level 5 – Research, St Mary’s Hospital, Oxford Road, Manchester, M13 9WL UK
| | - Vanitha N. Sivalingam
- Gynaecological Oncology Research Group, Division of Cancer Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Level 5 – Research, St Mary’s Hospital, Oxford Road, Manchester, M13 9WL UK
| | - James Bolton
- Department of Histopathology, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Rhona J. McVey
- Department of Histopathology, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Stephen A. Roberts
- Division of Population Health, Health Services Research and Primary Care, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Kay M. Marshall
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Kaye J. Williams
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Ian J. Stratford
- Division of Pharmacy and Optometry, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Emma J. Crosbie
- Gynaecological Oncology Research Group, Division of Cancer Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Level 5 – Research, St Mary’s Hospital, Oxford Road, Manchester, M13 9WL UK
- Department of Obstetrics and Gynaecology, St Mary’s Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
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Felmlee MA, Morse BL, Follman KE, Morris ME. The Drug of Abuse Gamma-Hydroxybutyric Acid Exhibits Tissue-Specific Nonlinear Distribution. AAPS J 2017; 20:21. [PMID: 29280004 DOI: 10.1208/s12248-017-0180-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 12/03/2017] [Indexed: 02/08/2023]
Abstract
The drug of abuse γ-hydroxybutyric acid (GHB) demonstrates complex toxicokinetics with dose-dependent metabolic and renal clearance. GHB is a substrate of monocarboxylate transporters (MCTs) which are responsible for the saturable renal reabsorption of GHB. MCT expression is observed in many tissues and therefore may impact the tissue distribution of GHB. The objective of the present study was to evaluate the tissue distribution kinetics of GHB at supratherapeutic doses. GHB (400, 600, and 800 mg/kg iv) or GHB 600 mg/kg plus L-lactate (330 mg/kg iv bolus followed by 121 mg/kg/h infusion) was administered to rats and blood and tissues were collected for up to 330 min post-dose. K p values for GHB varied in both a tissue- and dose-dependent manner and were less than 0.5 (except in the kidney). Nonlinear partitioning was observed in the liver (0.06 at 400 mg/kg to 0.30 at 800 mg/kg), kidney (0.62 at 400 mg/kg to 0.98 at 800 mg/kg), and heart (0.15 at 400 mg/kg to 0.29 at 800 mg/kg), with K p values increasing with dose consistent with saturation of transporter-mediated efflux. In contrast, lung partitioning decreased in a dose-dependent manner (0.43 at 400 mg/kg to 0.25 at 800 mg/kg) suggesting saturation of active uptake. L-lactate administration decreased K p values in liver, striatum, and hippocampus and increased K p values in lung and spleen. GHB demonstrates tissue-specific nonlinear distribution consistent with the involvement of monocarboxylate transporters. These observed complexities are likely due to the involvement of MCT1 and 4 with different affinities and directionality for GHB transport.
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Affiliation(s)
- Melanie A Felmlee
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York, 14214, USA. .,Department of Pharmaceutics & Medicinal Chemistry, Thomas J Long School of Pharmacy & Health Sciences, University of the Pacific, Stockton, California, 95211, USA.
| | - Bridget L Morse
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York, 14214, USA.,Investigative Drug Disposition, Eli Lilly and Company, Indianapolis, Indiana, USA
| | - Kristin E Follman
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York, 14214, USA
| | - Marilyn E Morris
- Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, New York, 14214, USA
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Granja S, Tavares-Valente D, Queirós O, Baltazar F. Value of pH regulators in the diagnosis, prognosis and treatment of cancer. Semin Cancer Biol 2017; 43:17-34. [PMID: 28065864 DOI: 10.1016/j.semcancer.2016.12.003] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 12/15/2016] [Accepted: 12/29/2016] [Indexed: 02/07/2023]
Abstract
Altered metabolism, associated with acidification of the extracellular milieu, is one of the major features of cancer. As pH regulation is crucial for the maintenance of all biological functions, cancer cells rely on the activity of lactate exporters and proton transporters to regulate their intracellular pH. The major players in cancer pH regulation are proton pump ATPases, sodium-proton exchangers (NHEs), monocarboxylate transporters (MCTs), carbonic anhydrases (CAs) and anion exchangers (AEs), which have been shown to be upregulated in several human malignancies. Thanks to the activity of the proton pumps and transporters, tumours acidify their microenvironment, becoming more aggressive and resistant to therapy. Thus, targeting tumour pH may contribute to more effective anticancer strategies for controlling tumour progression and therapeutic resistance. In the present study, we review the role of the main pH regulators expressed in human cancer cells, including their diagnostic and prognostic value, as well as their usefulness as therapeutic targets.
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Affiliation(s)
- Sara Granja
- Life and Health Sciences Research Institute (ICVS)/School of Medicine/University of Minho, Campus de Gualtar, Braga, 4710-057, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Diana Tavares-Valente
- Life and Health Sciences Research Institute (ICVS)/School of Medicine/University of Minho, Campus de Gualtar, Braga, 4710-057, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal; IINFACTS - Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, Gandra, Portugal
| | - Odília Queirós
- IINFACTS - Institute of Research and Advanced Training in Health Sciences and Technologies, Department of Sciences, University Institute of Health Sciences (IUCS), CESPU, CRL, Gandra, Portugal; CBMA - Center of Molecular and Environmental Biology/Department of Biology/University of Minho, Campus de Gualtar, Braga, 4710-057, Portugal
| | - Fátima Baltazar
- Life and Health Sciences Research Institute (ICVS)/School of Medicine/University of Minho, Campus de Gualtar, Braga, 4710-057, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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Abstract
Muscle performance depends on the supply of metabolic fuels and disposal of end-products. Using circulating metabolite concentrations to infer changes in fluxes is highly unreliable because the relationship between these parameters varies greatly with physiological state. Quantifying fuel kinetics directly is therefore crucial to the understanding of muscle metabolism. This review focuses on how carbohydrates, lipids and amino acids are provided to fish muscles during hypoxia and swimming. Both stresses force white muscle to produce lactate at higher rates than it can be processed by aerobic tissues. However, lactate accumulation is minimized because disposal is also strongly stimulated. Exogenous supply shows that trout have a much higher capacity to metabolize lactate than observed during hypoxia or intense swimming. The low density of monocarboxylate transporters and their lack of upregulation with exercise explain the phenomenon of white muscle lactate retention. This tissue operates as a quasi-closed system, where glycogen stores act as an 'energy spring' that alternates between explosive power release during swimming and slow recoil from lactate in situ during recovery. To cope with exogenous glucose, trout can completely suppress hepatic production and boost glucose disposal. Without these responses, glycemia would increase four times faster and reach dangerous levels. The capacity of salmonids for glucoregulation is therefore much better than presently described in the literature. Instead of albumin-bound fatty acids, fish use lipoproteins to shuttle energy from adipose tissue to working muscles during prolonged exercise. Proteins may play an important role in fueling muscle work in fish, but their exact contribution is yet to be established. The membrane pacemaker theory of metabolism accurately predicts general properties of muscle membranes such as unsaturation, but it does not explain allometric patterns of specific fatty acids. Investigations of metabolic fuel kinetics carried out in fish to date have demonstrated that these ectotherms use several unique strategies to orchestrate energy supply to working muscles and to survive hypoxia.
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Affiliation(s)
| | - Kevin Choi
- Biology Department, University of Ottawa, Ottawa, Ontario, Canada
| | - Alex Gonzalez
- Biology Department, University of Ottawa, Ottawa, Ontario, Canada
| | - Teye Omlin
- Biology Department, University of Ottawa, Ottawa, Ontario, Canada
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Takahashi T, Friedmacher F, Zimmer J, Puri P. Decreased expression of monocarboxylate transporter 1 and 4 in the branching airway epithelium of nitrofen-induced congenital diaphragmatic hernia. J Pediatr Surg 2016; 51:896-9. [PMID: 26996590 DOI: 10.1016/j.jpedsurg.2016.02.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Accepted: 02/26/2016] [Indexed: 12/28/2022]
Abstract
BACKGROUND/PURPOSE Monocarboxylate transporters (MCTs) are crucial for the maintenance of intracellular pH homeostasis in developing fetal lungs. MCT1/4 is strongly expressed by epithelial airway cells throughout lung branching morphogenesis. Functional inhibition of MCT1/4 in fetal rat lung explants has been shown to result in airway defects similar to pulmonary hypoplasia (PH) in congenital diaphragmatic hernia (CDH). We hypothesized that pulmonary expression of MCT1/4 is decreased during lung branching morphogenesis in the nitrofen model of CDH-associated PH. METHODS Timed-pregnant rats received nitrofen or vehicle on gestational day 9 (D9). Fetuses were harvested on D15, D18, and D21, and divided into control and nitrofen-exposed group. Pulmonary gene expression levels of MCT1/4 were analyzed by qRT-PCR. Immunofluorescence staining for MCT1/4 was combined with E-cadherin in order to evaluate protein expression in branching airway tissue. RESULTS Relative mRNA levels of MCT1/4 were significantly reduced in lungs of nitrofen-exposed fetuses on D15, D18, and D21 compared to controls. Confocal laser scanning microscopy confirmed markedly decreased immunofluorescence of MCT1/4 in distal bronchial and primitive alveolar epithelium of nitrofen-exposed fetuses on D15, D18, and D21 compared to controls. CONCLUSION Decreased expression of MCT1/4 in distal airway epithelium may disrupt lung branching morphogenesis and thus contribute to the development of PH in the nitrofen-induced CDH model.
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Affiliation(s)
- Toshiaki Takahashi
- National Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin, Ireland
| | - Florian Friedmacher
- National Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin, Ireland
| | - Julia Zimmer
- National Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin, Ireland
| | - Prem Puri
- National Children's Research Centre, Our Lady's Children's Hospital, Crumlin, Dublin, Ireland; Conway Institute of Biomolecular and Biomedical Research, School of Medicine & Medical Science, University College Dublin, Dublin, Ireland.
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Cupeiro R, Pérez-Prieto R, Amigo T, Gortázar P, Redondo C, González-Lamuño D. Role of the monocarboxylate transporter MCT1 in the uptake of lactate during active recovery. Eur J Appl Physiol 2016; 116:1005-10. [PMID: 27026015 DOI: 10.1007/s00421-016-3365-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 03/12/2016] [Indexed: 11/28/2022]
Abstract
PURPOSE We assessed the role of monocarboxylate transporter 1 (MCT1) on lactate clearance during an active recovery after high-intensity exercise, by comparing genetic groups based on the T1470A (rs1049434) MCT1 polymorphism, whose influence on lactate transport has been proven. METHODS Sixteen young male elite field hockey players participated in this study. All of them completed two 400 m maximal run tests performed on different days, followed by 40 min of active or passive recovery. Lactate samples were measured immediately after the tests, and at min 10, 20, 30 and 40 of the recoveries. Blood lactate decreases were calculated for each 10-min period. Participants were distributed into three groups according to the T1470A polymorphism (TT, TA and AA). RESULTS TT group had a lower blood lactate decrease than AA group during the 10-20 min period of the active recovery (p = 0.018). This period had the highest blood lactate for the whole sample, significantly differing from the other periods (p ≤ 0.003). During the passive recovery, lactate declines were constant except for the 0-10-min period (p ≤ 0.003), suggesting that liver uptake is similar in all the genetic groups, and that the difference seen during the active recovery is mainly due to muscle lactate uptake. CONCLUSIONS These differences according to the polymorphic variant T1470A suggest that MCT1 affects the plasma lactate decrease during a crucial period of active recovery, where the maximal lactate amount is cleared (i.e. 10-20 min period).
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Affiliation(s)
- Rocío Cupeiro
- LFE Research Group, Faculty of Physical Activity and Sports Sciences-INEF, Universidad Politécnica de Madrid, C/Martín Fierro no 7, 28040, Madrid, Spain.
| | - Raúl Pérez-Prieto
- Laboratory of Pediatrics, Facultad de Medicina, Universidad de Cantabria, Avda. Cardenal Herrera Oria s/n, 39011, Santander, Cantabria, Spain
| | - Teresa Amigo
- Laboratory of Pediatrics, Facultad de Medicina, Universidad de Cantabria, Avda. Cardenal Herrera Oria s/n, 39011, Santander, Cantabria, Spain.,Division of Pediatrics, Valdecilla Research Institute (IDIVAL), Edificio IDIVAL, Avenida Cardenal Herrera Oria s/n, 39011, Santander, Cantabria, Spain
| | - Pilar Gortázar
- Division of Pediatrics, Valdecilla Research Institute (IDIVAL), Edificio IDIVAL, Avenida Cardenal Herrera Oria s/n, 39011, Santander, Cantabria, Spain
| | - Carlos Redondo
- Laboratory of Pediatrics, Facultad de Medicina, Universidad de Cantabria, Avda. Cardenal Herrera Oria s/n, 39011, Santander, Cantabria, Spain
| | - Domingo González-Lamuño
- Laboratory of Pediatrics, Facultad de Medicina, Universidad de Cantabria, Avda. Cardenal Herrera Oria s/n, 39011, Santander, Cantabria, Spain.,Division of Pediatrics, Valdecilla Research Institute (IDIVAL), Edificio IDIVAL, Avenida Cardenal Herrera Oria s/n, 39011, Santander, Cantabria, Spain
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Amorim R, Pinheiro C, Miranda-Gonçalves V, Pereira H, Moyer MP, Preto A, Baltazar F. Monocarboxylate transport inhibition potentiates the cytotoxic effect of 5-fluorouracil in colorectal cancer cells. Cancer Lett 2015; 365:68-78. [PMID: 26021766 DOI: 10.1016/j.canlet.2015.05.015] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Revised: 04/29/2015] [Accepted: 05/10/2015] [Indexed: 01/02/2023]
Abstract
Cancer cells rely mostly on glycolysis to meet their energetic demands, producing large amounts of lactate that are extruded to the tumour microenvironment by monocarboxylate transporters (MCTs). The role of MCTs in the survival of colorectal cancer (CRC) cells is scarce and poorly understood. In this study, we aimed to better understand this issue and exploit these transporters as novel therapeutic targets alone or in combination with the CRC classical chemotherapeutic drug 5-Fluorouracil. For that purpose, we characterized the effects of MCT activity inhibition in normal and CRC derived cell lines and assessed the effect of MCT inhibition in combination with 5-FU. Here, we demonstrated that MCT inhibition using CHC (α-cyano-4-hydroxycinnamic acid), DIDS (4,4'-diisothiocyanatostilbene-2,2'-disulphonic acid) and quercetin decreased cell viability, disrupted the glycolytic phenotype, inhibited proliferation and enhanced cell death in CRC cells. These results were confirmed by specific inhibition of MCT1/4 by RNA interference. Notably, we showed that 5-FU cytotoxicity was potentiated by lactate transport inhibition in CRC cells, either by activity inhibition or expression silencing. These findings provide novel evidence for the pivotal role of MCTs in CRC maintenance and survival, as well as for the use of these transporters as potential new therapeutic targets in combination with CRC conventional therapy.
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Affiliation(s)
- Ricardo Amorim
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Céline Pinheiro
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal; Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos, Sao Paulo, Brazil; Barretos School of Health Sciences Dr. Paulo Prata - FACISB, Barretos, Sao Paulo, Brazil
| | - Vera Miranda-Gonçalves
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Helena Pereira
- Centre of Molecular and Environmental Biology (CBMA)/Department of Biology, University of Minho, Braga, Portugal
| | | | - Ana Preto
- Centre of Molecular and Environmental Biology (CBMA)/Department of Biology, University of Minho, Braga, Portugal
| | - Fátima Baltazar
- Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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Fujiwara S, Wada N, Kawano Y, Okuno Y, Kikukawa Y, Endo S, Nishimura N, Ueno N, Mitsuya H, Hata H. Lactate, a putative survival factor for myeloma cells, is incorporated by myeloma cells through monocarboxylate transporters 1. Exp Hematol Oncol 2015; 4:12. [PMID: 25909034 PMCID: PMC4407384 DOI: 10.1186/s40164-015-0008-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 04/02/2015] [Indexed: 01/30/2023] Open
Abstract
Background Lactate levels within tumors are correlated with metastases, tumor recurrence, and radioresistance, thus apparently contributing to poor outcomes in patients with various cancers. We previously reported that high-level production of lactate by multiple myeloma (MM) cell lines is associated with high-level LDH activity within such MM cells. However, the kinetics of lactate remains to be studied. In the present study, we attempted to elucidate the mechanism of lactate incorporation into MM cells. Methods Six MM cell lines and stromal cells obtained through long-term culture of bone marrow samples from MM patients were employed. Incorporation of lactate was quantified using C14-labeled lactate. The role of MCT1, a member of the monocarboxylate transporters (MCTs), expressed on MM cells, was examined in the presence of its inhibitor (α-cyano-4-hydroxycinnamic acid: CHC) and by using gene-silencing technique. Results MM cell lines as well as stromal cells were found to produce lactate. Incorporation of C14-labeled lactate into MM cells occurred in all 6 MM cell lines analyzed. Inhibition of MCT1 by using CHC or MCT1-targeting siRNA reduced lactate incorporation and caused apoptosis in MM cells. This apoptosis was enhanced when the activity of pyruvate dehydrogenase kinase was blocked by dichroloacetate. Survival of normal peripheral blood mononuclear cells was not influenced by MCT1 inhibition. Conclusions The present data suggest that lactate is produced by MM cell lines and stromal cells, and contributes to the survival of such MM cells in autocrine or paracrine manners. Suppression of lactate incorporation by targeting MCT1 may provide a novel therapeutic strategy for MM which may be applicable for other B-cell neoplasms.
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Affiliation(s)
- Shiho Fujiwara
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan
| | - Naoko Wada
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan
| | - Yawara Kawano
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan
| | - Yutaka Okuno
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan
| | - Yoshitaka Kikukawa
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan
| | - Shinya Endo
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan
| | - Nao Nishimura
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan
| | - Nina Ueno
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan
| | - Hiroaki Mitsuya
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan
| | - Hiroyuki Hata
- Department of Hematology, Kumamoto University School of Medicine, 1-1-1, Honjo, Chu-ouku, Kumamoto city, Kumamoto 860-8556 Japan ; Graduate School of Health Sciences, Faculty of Medical Sciences, Division of Informative Clinical Sciences, Kumamoto University School of Medicine, 4-24-1 Kuhonji, Kumamoto, 862-0976 Japan
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Abstract
Major determinants that influence negative outcome in cancer patients are the abilities of cancer cells to resist current therapies and to invade surrounding host tissue, consequently leading to local and metastatic dissemination. Hyaluronan (HA), a prominent constituent of the tumor microenvironment, not only provides structural support but also interacts with cell surface receptors, especially CD44, that influence cooperative signaling pathways leading to chemoresistance and invasiveness. CD147 (emmprin; basigin) is a member of the Ig superfamily that has also been strongly implicated in chemoresistance and invasiveness. CD147 both regulates HA synthesis and interacts with the HA receptors, CD44, and LYVE-1. Increased CD147 expression induces formation of multiprotein complexes containing CD44 (or LYVE-1) as well as members of the membrane-type matrix metalloproteinase, receptor tyrosine kinase, ABC drug transporter, or monocarboxylate transporter families, which become assembled in specialized lipid raft domains along with CD147 itself. In each case, multivalent HA-receptor interactions are essential for formation or stabilization of the lipid raft complexes and for downstream signaling pathways or transporter activities that are driven by these complexes. We conclude that cooperativity between HA, HA receptors, and CD147 may be a major driver of the interconnected pathways of invasiveness and chemoresistance widely critical to malignancy.
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Affiliation(s)
- G Daniel Grass
- Department of Regenerative Medicine & Cell Biology, Medical University of South Carolina, Charleston, South Carolina, USA.
| | - Lu Dai
- Department of Medicine, Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA
| | - Zhiqiang Qin
- Department of Microbiology, Immunology & Parasitology, Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA
| | - Chris Parsons
- Department of Medicine, Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA; Department of Microbiology, Immunology & Parasitology, Stanley S. Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA
| | - Bryan P Toole
- Department of Regenerative Medicine & Cell Biology, Medical University of South Carolina, Charleston, South Carolina, USA; Hollings Cancer Center, Medical University of South Carolina, Charleston, South Carolina, USA.
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Gao C, Zhou L, Zhu W, Wang H, Wang R, He Y, Li Z. Monocarboxylate transporter-dependent mechanism confers resistance to oxygen- and glucose-deprivation injury in astrocyte-neuron co-cultures. Neurosci Lett 2015; 594:99-104. [PMID: 25827488 DOI: 10.1016/j.neulet.2015.03.062] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2015] [Revised: 03/26/2015] [Accepted: 03/27/2015] [Indexed: 12/16/2022]
Abstract
Hypoxic and low-glucose stressors contribute to neuronal death in many brain diseases. Astrocytes are anatomically well-positioned to shield neurons from hypoxic injury. During hypoxia/ischemia, lactate released from astrocytes is taken up by neurons and stored for energy. This process is mediated by monocarboxylate transporters (MCTs) in the central nervous system. In the present study, we investigated the ability of astrocytes to protect neurons from oxygen- and glucose-deprivation (OGD) injury via an MCT-dependent mechanism in vitro. Primary cultures of neurons, astrocytes, and astrocytes-neurons derived from rat hippocampus were subjected to OGD, MCT inhibition with small interfering (si)RNA. Cell survival and expression of MCT4, MCT2, glial fibrillary acidic protein, and neuronal nuclear antigen were evaluated. OGD significantly increased cell death in neuronal cultures and up-regulated MCT4 expression in astrocyte cultures, but no increased cell death was observed in neuron-astrocyte co-cultures or astrocyte cultures. However, neuronal cell death in co-cultures was increased by exposure to MCT4- or MCT2-specific siRNA, and this effect was attenuated by the addition of lactate into the extracellular medium of neuronal cultures prior to OGD. These findings demonstrate that resistance to OGD injury in astrocyte-neuron co-cultures occurs via an MCT-dependent mechanism.
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Affiliation(s)
- Chen Gao
- Department of Neurosurgery, AnNing Branch Hospital, Lanzhou General Hospital, Lanzhou Command, PLA, Lanzhou, Gansu Province 730070, China
| | - Liya Zhou
- Electrophysiology Examining Room, Department of Neurology, People's Hospital of Gansu Province, Lanzhou, Gansu Province 730000, China
| | - Wenxia Zhu
- Department of Traumatology, AnNing Branch Hospital, Lanzhou General Hospital, Lanzhou Command, PLA, Lanzhou, Gansu Province 730070, China
| | - Hongyun Wang
- Department of Neurosurgery, AnNing Branch Hospital, Lanzhou General Hospital, Lanzhou Command, PLA, Lanzhou, Gansu Province 730070, China
| | - Ruijuan Wang
- Department of Neurosurgery, AnNing Branch Hospital, Lanzhou General Hospital, Lanzhou Command, PLA, Lanzhou, Gansu Province 730070, China
| | - Yunfei He
- Department of Traumatology, AnNing Branch Hospital, Lanzhou General Hospital, Lanzhou Command, PLA, Lanzhou, Gansu Province 730070, China
| | - Zhiyun Li
- Department of Neurosurgery, Lanzhou General Hospital, Lanzhou Command, PLA, South of Binhe Road, No. 333, Lanzhou, Gansu Province 730050, China.
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Yoneda T, Hiasa M, Nagata Y, Okui T, White F. Contribution of acidic extracellular microenvironment of cancer-colonized bone to bone pain. Biochim Biophys Acta 2015; 1848:2677-84. [PMID: 25687976 DOI: 10.1016/j.bbamem.2015.02.004] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 02/01/2015] [Accepted: 02/05/2015] [Indexed: 12/31/2022]
Abstract
Solid and hematologic cancer colonized bone produces a number of pathologies. One of the most common complications is bone pain. Cancer-associated bone pain (CABP) is a major cause of increased morbidity and diminishes the quality of life and affects survival. Current treatments do not satisfactorily control CABP and can elicit adverse effects. Thus, new therapeutic interventions are needed to manage CABP. However, the mechanisms responsible for CABP are poorly understood. The observation that specific osteoclast inhibitors can reduce CABP in patients indicates a critical role of osteoclasts in the pathophysiology of CABP. Osteoclasts create an acidic extracellular microenvironment by secretion of protons via vacuolar proton pumps during bone resorption. In addition, bone-colonized cancer cells also release protons and lactate via plasma membrane pH regulators to avoid intracellular acidification resulting from increased aerobic glycolysis known as the Warburg effect. Since acidosis is algogenic for sensory neurons and bone is densely innervated by sensory neurons that express acid-sensing nociceptors, the acidic bone microenvironments can evoke CABP. Understanding of the mechanism by which the acidic extracellular microenvironment is created in cancer-colonized bone and the expression and function of the acid-sensing nociceptors are regulated should facilitate the development of novel approaches for management of CABP. Here, the contribution of the acidic microenvironment created in cancer-colonized bone to elicitation of CABP and potential therapeutic implications of blocking the development and recognition of acidic microenvironment will be described. This article is part of a Special Issue entitled: Membrane channels and transporters in cancers.
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Affiliation(s)
- Toshiyuki Yoneda
- Department of Medicine, Hematology/Oncology, Indiana University School of Medicine, 980 W. Walnut Street, Indianapolis, IN 46202, USA.
| | - Masahiro Hiasa
- Department of Medicine, Hematology/Oncology, Indiana University School of Medicine, 980 W. Walnut Street, Indianapolis, IN 46202, USA.
| | - Yuki Nagata
- Department of Medicine, Hematology/Oncology, Indiana University School of Medicine, 980 W. Walnut Street, Indianapolis, IN 46202, USA.
| | - Tatsuo Okui
- Department of Medicine, Hematology/Oncology, Indiana University School of Medicine, 980 W. Walnut Street, Indianapolis, IN 46202, USA.
| | - Fletcher White
- Department of Anesthesia, Paul and Carole Stark Neurosciences Research Institute, Indiana University, 320 West 15th Street, Indianapolis, IN 46202, USA.
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Spugnini EP, Sonveaux P, Stock C, Perez-Sayans M, De Milito A, Avnet S, Garcìa AG, Harguindey S, Fais S. Proton channels and exchangers in cancer. Biochim Biophys Acta 2014; 1848:2715-26. [PMID: 25449995 DOI: 10.1016/j.bbamem.2014.10.015] [Citation(s) in RCA: 142] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 10/07/2014] [Accepted: 10/13/2014] [Indexed: 12/18/2022]
Abstract
Although cancer is characterized by an intratumoral genetic heterogeneity, a totally deranged pH control is a common feature of most cancer histotypes. Major determinants of aberrant pH gradient in cancer are proton exchangers and transporters, including V-ATPase, Na+/H+ exchanger (NHE), monocarboxylate transporters (MCTs) and carbonic anhydrases (CAs). Thanks to the activity of these proton transporters and exchangers, cancer becomes isolated and/or protected not only from the body reaction against the growing tumor, but also from the vast majority of drugs that when protonated into the acidic tumor microenvironment do not enter into cancer cells. Proton transporters and exchangers represent a key feature tumor cells use to survive in the very hostile microenvironmental conditions that they create and maintain. Detoxifying mechanisms may thus represent both a key survival option and a selection outcome for cells that behave as unicellular microorganisms rather than belonging to an organ, compartment or body. It is, in fact, typical of malignant tumors that, after a clinically measurable yet transient initial response to a therapy, resistant tumor clones emerge and proliferate, thus bursting a more malignant behavior and rapid tumor progression. This review critically presents the background of a novel and efficient approach that aims to fight cancer through blocking or inhibiting well characterized proton exchangers and transporters active in human cancer cells. This article is part of a Special Issue entitled: Membrane channels and transporters in cancers.
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Affiliation(s)
- Enrico Pierluigi Spugnini
- Anti-Cancer Drug Section, Department of Drug Research and Medicine Evaluation, Istituto Superiore di Sanità (National Institute of Health), Rome, Italy
| | - Pierre Sonveaux
- Institut de Recherche Expérimentale et Clinique (IREC), Pole of Pharmacology, Université Catholique de Louvain (UCL), Brussels, Belgium
| | - Christian Stock
- Department of Gastroenterology, Hannover Medical School, Hannover, Germany
| | - Mario Perez-Sayans
- Oral Medicine, Oral Surgery and Implantology Unit, Faculty of Medicine and Dentistry, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain
| | - Angelo De Milito
- Cancer Center Karolinska, Department of Oncology-Pathology, Karolinska Institute, Stockholm, Sweden
| | - Sofia Avnet
- Laboratory for Orthopaedic Pathophysiology and Regenerative Medicine, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - Abel Garcìa Garcìa
- Oral Medicine, Oral Surgery and Implantology Unit, Faculty of Medicine and Dentistry, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain
| | | | - Stefano Fais
- Anti-Cancer Drug Section, Department of Drug Research and Medicine Evaluation, Istituto Superiore di Sanità (National Institute of Health), Rome, Italy.
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Alves VA, Pinheiro C, Morais-Santos F, Felipe-Silva A, Longatto-Filho A, Baltazar F. Characterization of monocarboxylate transporter activity in hepatocellular carcinoma. World J Gastroenterol 2014; 20:11780-11787. [PMID: 25206282 PMCID: PMC4155368 DOI: 10.3748/wjg.v20.i33.11780] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 03/07/2014] [Accepted: 06/17/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To assess the immunoexpression of hypoxia-related markers in samples from cirrhosis and primary and metastatic hepatocellular carcinoma (HCC).
METHODS: From a total of 5836 autopsies performed at the Pathology Department - University of Sao Paulo School of Medicine Hospital - from 2003 to 2009, 188 presented primary liver tumors. Immunohistochemical reactivity for monocarboxylate transporters (MCTs)-1, 2 and 4, CD147 and glucose transporter-1 (GLUT1) was assessed in necropsies from 80 cases of HCC. Data were stored and analyzed using the IBM SPSS statistical software (version 19, IBM Company, Armonk, NY). All comparisons were examined for statistical significance using Pearson’s χ2 test and Fisher’s exact test (when n < 5). The threshold for significant P values was established as P < 0.05.
RESULTS: Plasma membrane expression of MCT4 and overall expression of GLUT1 showed progressively higher expression from non-neoplastic to primary HCC and to metastases. In contrast, overall expression of MCT2 was progressively decreased from non-neoplastic to primary HCC and to metastases. MCT1 (overall and plasma membrane expression), MCT2 and CD147 plasma membrane expression were associated with absence of cirrhosis, while plasma membrane expression of CD147 was also associated with absence of HBV infection. MCT2 overall expression was associated with lower liver weight, absence of metastasis and absence of abdominal dissemination. Additionally, MCT4 plasma membrane positivity was strongly associated with Ki-67 expression.
CONCLUSION: MCT4 and GLUT1 appear to play a role in HCC progression, while MCT2 is lost during progression and associated with better prognosis.
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Aveseh M, Nikooie R, Sheibani V, Esmaeili-Mahani S. Endurance training increases brain lactate uptake during hypoglycemia by up regulation of brain lactate transporters. Mol Cell Endocrinol 2014; 394:29-36. [PMID: 25004253 DOI: 10.1016/j.mce.2014.06.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 06/26/2014] [Accepted: 06/30/2014] [Indexed: 10/25/2022]
Abstract
The capacity of the brain to metabolize non-glucose substrates under hypoglycemic state maintains its energy requirements. We hypothesized that exercise-induced increase in capacity for brain utilization of lactate by up regulation of the monocarboxylate transporters (MCTs) may contribute metabolic substrates during hypoglycemia in diabetic rats induced by streptozotocin. The induced diabetes increased MCT1 and MCT2 expression in the cortex and the hippocampus in the sedentary diabetic animals. There were exercise-induced increases in MCT1 in the cortex and the hippocampus and MCT2 expression in the cortex in trained diabetic animals; whereas, no changes were found in the healthy trained animals. Both diabetic and healthy trained animals showed higher values for brain lactate uptake during insulin-induced hypoglycemia when animals were intraperitoneally injected by L(+)-lactic acid. However, the response of counterregulatory hormones during hypoglycemia were blunted in the diabetic trained animals which indicates to carefully monitoring of glycemic targets both during and following prolonged exercise.
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Affiliation(s)
- Malihe Aveseh
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran; Department of Exercise Physiology, Faculty of Physical Education and Sport Science, Shahid Bahonar University of Kerman, Kerman, Iran
| | - Rohollah Nikooie
- Department of Exercise Physiology, Faculty of Physical Education and Sport Science, Shahid Bahonar University of Kerman, Kerman, Iran.
| | - Vahid Sheibani
- Neuroscience Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Saeed Esmaeili-Mahani
- Department of Biology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
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Doyen J, Trastour C, Ettore F, Peyrottes I, Toussant N, Gal J, Ilc K, Roux D, Parks SK, Ferrero JM, Pouysségur J. Expression of the hypoxia-inducible monocarboxylate transporter MCT4 is increased in triple negative breast cancer and correlates independently with clinical outcome. Biochem Biophys Res Commun 2014; 451:54-61. [PMID: 25058459 DOI: 10.1016/j.bbrc.2014.07.050] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 07/10/2014] [Indexed: 12/31/2022]
Abstract
BACKGROUND (18)Fluor-deoxy-glucose PET-scanning of glycolytic metabolism is being used for staging in many tumors however its impact on prognosis has never been studied in breast cancer. METHODS Glycolytic and hypoxic markers: glucose transporter (GLUT1), carbonic anhydrase IX (CAIX), monocarboxylate transporter 1 and 4 (MCT1, 4), MCT accessory protein basigin and lactate-dehydrogenase A (LDH-A) were assessed by immunohistochemistry in two cohorts of breast cancer comprising 643 node-negative and 127 triple negative breast cancers (TNBC) respectively. RESULTS In the 643 node-negative breast tumor cohort with a median follow-up of 124 months, TNBC were the most glycolytic (≈70%), followed by Her-2 (≈50%) and RH-positive cancers (≈30%). Tumoral MCT4 staining (without stromal staining) was a strong independent prognostic factor for metastasis-free survival (HR=0.47, P=0.02) and overall-survival (HR=0.38, P=0.002). These results were confirmed in the independent cohort of 127 cancer patients. CONCLUSION Glycolytic markers are expressed in all breast tumors with highest expression occurring in TNBC. MCT4, the hypoxia-inducible lactate/H(+) symporter demonstrated the strongest deleterious impact on survival. We propose that MCT4 serves as a new prognostic factor in node-negative breast cancer and can perhaps act soon as a theranostic factor considering the current pharmacological development of MCT4 inhibitors.
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Affiliation(s)
- J Doyen
- Department of Radiation Oncology, Centre A. Lacassagne, Nice, France
| | - C Trastour
- Department of Gynecology, Archet II Hospital, 06202 Nice, France
| | - F Ettore
- Department of Pathology, Centre A. Lacassagne, Nice, France
| | - I Peyrottes
- Department of Pathology, Centre A. Lacassagne, Nice, France
| | - N Toussant
- Department of Pathology, Centre A. Lacassagne, Nice, France
| | - J Gal
- Department of Medical Statistics, Centre A. Lacassagne, Nice, France
| | - K Ilc
- Institute for Research on Cancer & Aging (IRCAN), University of Nice, Centre A. Lacassagne, 06189 Nice, France
| | - D Roux
- Institute for Research on Cancer & Aging (IRCAN), University of Nice, Centre A. Lacassagne, 06189 Nice, France
| | - S K Parks
- Centre Scientifique de Monaco (CSM), Monaco
| | - J M Ferrero
- Department of Medical Oncology, Centre A. Lacassagne, Nice, France
| | - J Pouysségur
- Institute for Research on Cancer & Aging (IRCAN), University of Nice, Centre A. Lacassagne, 06189 Nice, France; Centre Scientifique de Monaco (CSM), Monaco.
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