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Li X, Du L, Liu Q, Lu Z. MicroRNAs: Novel players in the diagnosis and treatment of cancer cachexia (Review). Exp Ther Med 2022; 24:446. [PMID: 35720622 PMCID: PMC9199081 DOI: 10.3892/etm.2022.11373] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 05/03/2022] [Indexed: 12/02/2022] Open
Abstract
Cachexia denotes a complex metabolic syndrome featuring severe loss of weight, fatigue and anorexia. In total, 50-80% of patients suffering from advanced cancer are diagnosed with cancer cachexia, which contributes to 40% of cancer-associated mortalities. MicroRNAs (miRNAs) are non-coding RNAs capable of regulating gene expression. Dysregulated miRNA expression has been observed in muscle tissue, adipose tissue and blood samples from patients with cancer cachexia compared with that of samples from patients with cancer without cachexia or healthy controls. In addition, miRNAs promote and maintain the malignant state of systemic inflammation, while inflammation contributes to cancer cachexia. The present review discusses the role of miRNAs in the progression of cancer cachexia, and assess their diagnostic value and potential therapeutic value.
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Affiliation(s)
- Xin Li
- Department of Oncology, Affiliated Hospital of Weifang Medical College, Weifang, Shandong 261000, P.R. China
| | - Lidong Du
- Graduate School, Weifang Medical College, Weifang, Shandong 261000, P.R. China
| | - Qiang Liu
- Graduate School, Weifang Medical College, Weifang, Shandong 261000, P.R. China
| | - Zhong Lu
- Department of Oncology, Affiliated Hospital of Weifang Medical College, Weifang, Shandong 261000, P.R. China
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Review of Mechanisms and Treatment of Cancer-Induced Cardiac Cachexia. Cells 2022; 11:cells11061040. [PMID: 35326491 PMCID: PMC8947347 DOI: 10.3390/cells11061040] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/14/2022] [Accepted: 03/17/2022] [Indexed: 11/18/2022] Open
Abstract
Cancer cachexia is a multifactorial, paraneoplastic syndrome that impacts roughly half of all cancer patients. It can negatively impact patient quality of life and prognosis by causing physical impairment, reducing chemotherapy tolerance, and precluding them as surgical candidates. While there is substantial research on cancer-induced skeletal muscle cachexia, there are comparatively fewer studies and therapies regarding cardiac cachexia in the setting of malignancy. A literature review was performed using the PubMed database to identify original articles pertaining to cancer-induced cardiac cachexia, including its mechanisms and potential therapeutic modalities. Seventy studies were identified by two independent reviewers based on inclusion and exclusion criteria. While there are multiple studies addressing the pathophysiology of cardiac-induced cancer cachexia, there are no studies evaluating therapeutic options in the clinical setting. Many treatment modalities including nutrition, heart failure medication, cancer drugs, exercise, and gene therapy have been explored in in vitro and mice models with varying degrees of success. While these may be beneficial in cancer patients, further prospective studies specifically focusing on the assessment and treatment of the cardiac component of cachexia are needed.
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Impact of Body Mass Index on Operative Outcomes in Head and Neck Free Flap Surgery. Otolaryngol Head Neck Surg 2018; 159:817-823. [DOI: 10.1177/0194599818777240] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Objective Analyze the risk for perioperative complications associated with body mass index (BMI) class in patients undergoing head and neck free flap reconstruction. Study Design and Setting Retrospective cohort study. Subjects and Methods The National Surgical Quality Improvement Program (NSQIP) database was queried for all cases of head and neck free flaps between 2005 and 2014 (N = 2187). This population was stratified into underweight, normal-weight, overweight, and obese BMI cohorts. Groups were compared for demographics, comorbidities, and procedure-related variables. Rates of postoperative complications were compared between groups using χ2 and binary logistic regression analyses. Results Underweight patients (n = 160) had significantly higher rates of numerous comorbidities, including disseminated cancer, preoperative chemotherapy, and anemia, while obese patients (n = 447) had higher rates of diabetes and hypertension. Rates of overall surgical complications, medical complications, and flap loss were insignificantly different between BMI groups. Following regression, obese BMI was protective for perioperative transfusion requirement (odds ratio [OR] = 0.63, P = .001), while underweight status conferred increased risk (OR = 2.43, P < .001). Recent weight loss was found to be an independent predictor of perioperative cardiac arrest (OR = 3.16, P = .006) while underweight BMI was not (OR = 1.21, P = .763). However, both weight loss and underweight status were associated with significantly increased risk for 30-day mortality (OR = 4.48, P = .032; OR = 4.02, P = .010, respectively). Conclusion Obesity does not increase the risk for postoperative complications in head and neck free flap surgery and may be protective in some cases. When assessing a patient’s fitness for surgery, underweight status or recent weight loss may suggest a reduced ability to tolerate extensive free flap reconstruction.
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Cala MP, Agulló‐Ortuño MT, Prieto‐García E, González‐Riano C, Parrilla‐Rubio L, Barbas C, Díaz‐García CV, García A, Pernaut C, Adeva J, Riesco MC, Rupérez FJ, Lopez‐Martin JA. Multiplatform plasma fingerprinting in cancer cachexia: a pilot observational and translational study. J Cachexia Sarcopenia Muscle 2018; 9:348-357. [PMID: 29464940 PMCID: PMC5879957 DOI: 10.1002/jcsm.12270] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 10/04/2017] [Accepted: 10/24/2017] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Cachexia is a metabolic syndrome that affects up to 50-80% of cancer patients. The pathophysiology is characterized by a variable combination of reduced food intake and abnormal metabolism, including systemic inflammation and negative protein and energy balance. Despite its high clinical significance, defined diagnostic criteria and established therapeutic strategies are lacking. The 'omics' technologies provide a global view of biological systems. We hypothesize that blood-based metabolomics might identify findings in cachectic patients that could provide clues to gain knowledge on its pathophysiology, and eventually postulate new therapeutic strategies. METHODS This is a cross-sectional observational study in two cohorts of cancer patients, with and without cachexia. Patients were consecutively recruited from routine clinical practice of a General Oncology Department at '12 de Octubre' University Hospital. Selected clinical and biochemical features were collected. Blood metabolite fingerprinting was performed using three analytical platforms, gas chromatography coupled to mass spectrometry (GC-MS), capillary electrophoresis coupled to mass spectrometry (CE-MS), and liquid chromatography coupled to mass spectrometry (LC-MS). Besides, we performed pathway-based metabolite analyses to obtain more information on biological functions. RESULTS A total of 15 subjects were included in this study, 8 cachectic and 7 non-cachectic patients. Metabolomic analyses were able to correctly classify their samples in 80% (GC-MS), 97% (CE-MS), 96% [LC-MS (positive mode)], and 89% [LC-MS (negative mode)] of the cases. The most prominent metabolic alteration in plasma of cachectic patients was the decrease of amino acids and derivatives [especially arginine, tryptophan, indolelactic acid, and threonine, with 0.4-fold change (FC) compared with non-cachectic patients], along with the reduction of glycerophospholipids [mainly lysophosphatidylcholines(O-16:0) and lysophosphatidylcholines(20:3) sn-1, FC = 0.1] and sphingolipids [SM(d30:0), FC = 0.5]. The metabolite with the highest increase was cortisol (FC = 1.6). Such alterations suggest a role of the following metabolic pathways in the pathophysiology of cancer cachexia: arginine and proline metabolism; alanine, aspartate, and glutamate metabolism; phenylalanine metabolism; lysine degradation; aminoacyl-tRNA biosynthesis; fatty acid elongation in mitochondria; tricarboxylic acids cycle; among others. CONCLUSIONS These findings suggest that plasma amino acids and lipids profiling has great potential to find the mechanisms involved in the pathogenesis of cachexia. Metabolic profiling of plasma from cancer patients show differences between cachexia and non-cachexia in amino acids and lipids that might be related to mechanisms involved in its pathophysiology. A better understanding of these mechanisms might identify novel therapeutic approaches to palliate this unmet medical condition.
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Affiliation(s)
- Mónica Patricia Cala
- Centre for Metabolomic and Bioanalysis (CEMBIO), Facultad de FarmaciaUniversidad San Pablo CEUUrbanización Montepríncipe, M‐501 km 028660Boadilla del Monte, MadridSpain
- Grupo de Investigación en Química Analítica y Bioanalítica (GABIO), Department of Chemistry, Faculty of SciencesUniversidad de los AndesCra. 1 No. 18a‐10111710BogotáColombia
| | - María Teresa Agulló‐Ortuño
- Clinical & Translational Cancer Research GroupInstituto de Investigación Sanitaria Hospital 12 de Octubre (i+12)Av Córdoba s/n28041MadridSpain
| | - Elena Prieto‐García
- Clinical & Translational Cancer Research GroupInstituto de Investigación Sanitaria Hospital 12 de Octubre (i+12)Av Córdoba s/n28041MadridSpain
| | - Carolina González‐Riano
- Centre for Metabolomic and Bioanalysis (CEMBIO), Facultad de FarmaciaUniversidad San Pablo CEUUrbanización Montepríncipe, M‐501 km 028660Boadilla del Monte, MadridSpain
| | - Lucía Parrilla‐Rubio
- Medical Oncology DepartmentHospital Universitario 12 de OctubreAv de Córdoba s/n28041MadridSpain
| | - Coral Barbas
- Centre for Metabolomic and Bioanalysis (CEMBIO), Facultad de FarmaciaUniversidad San Pablo CEUUrbanización Montepríncipe, M‐501 km 028660Boadilla del Monte, MadridSpain
| | - Carmen Vanesa Díaz‐García
- Clinical & Translational Cancer Research GroupInstituto de Investigación Sanitaria Hospital 12 de Octubre (i+12)Av Córdoba s/n28041MadridSpain
| | - Antonia García
- Centre for Metabolomic and Bioanalysis (CEMBIO), Facultad de FarmaciaUniversidad San Pablo CEUUrbanización Montepríncipe, M‐501 km 028660Boadilla del Monte, MadridSpain
| | - Cristina Pernaut
- Medical Oncology DepartmentHospital Universitario 12 de OctubreAv de Córdoba s/n28041MadridSpain
| | - Jorge Adeva
- Medical Oncology DepartmentHospital Universitario 12 de OctubreAv de Córdoba s/n28041MadridSpain
| | - María Carmen Riesco
- Medical Oncology DepartmentHospital Universitario 12 de OctubreAv de Córdoba s/n28041MadridSpain
| | - Francisco Javier Rupérez
- Centre for Metabolomic and Bioanalysis (CEMBIO), Facultad de FarmaciaUniversidad San Pablo CEUUrbanización Montepríncipe, M‐501 km 028660Boadilla del Monte, MadridSpain
| | - Jose Antonio Lopez‐Martin
- Clinical & Translational Cancer Research GroupInstituto de Investigación Sanitaria Hospital 12 de Octubre (i+12)Av Córdoba s/n28041MadridSpain
- Medical Oncology DepartmentHospital Universitario 12 de OctubreAv de Córdoba s/n28041MadridSpain
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Michaelis KA, Zhu X, Burfeind KG, Krasnow SM, Levasseur PR, Morgan TK, Marks DL. Establishment and characterization of a novel murine model of pancreatic cancer cachexia. J Cachexia Sarcopenia Muscle 2017; 8:824-838. [PMID: 28730707 PMCID: PMC5659050 DOI: 10.1002/jcsm.12225] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 05/22/2017] [Accepted: 05/29/2017] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Cachexia is a complex metabolic and behavioural syndrome lacking effective therapies. Pancreatic ductal adenocarcinoma (PDAC) is one of the most important conditions associated with cachexia, with >80% of PDAC patients suffering from the condition. To establish the cardinal features of a murine model of PDAC-associated cachexia, we characterized the effects of implanting a pancreatic tumour cell line from a syngeneic C57BL/6 KRASG12D P53R172H Pdx-Cre+/+ (KPC) mouse. METHODS Male and female C57BL/6 mice were inoculated subcutaneously, intraperitoneally, or orthotopically with KPC tumour cells. We performed rigorous phenotypic, metabolic, and behavioural analysis of animals over the course of tumour development. RESULTS All routes of administration produced rapidly growing tumours histologically consistent with moderate to poorly differentiated PDAC. The phenotype of this model was dependent on route of administration, with orthotopic and intraperitoneal implantation inducing more severe cachexia than subcutaneous implantation. KPC tumour growth decreased food intake, decreased adiposity and lean body mass, and decreased locomotor activity. Muscle catabolism was observed in both skeletal and cardiac muscles, but the dominant catabolic pathway differed between these tissues. The wasting syndrome in this model was accompanied by hypothalamic inflammation, progressively decreasing brown and white adipose tissue uncoupling protein 1 (Ucp1) expression, and increased peripheral inflammation. Haematological and endocrine abnormalities included neutrophil-dominant leukocytosis and anaemia, and decreased serum testosterone. CONCLUSIONS Syngeneic KPC allografts are a robust model for studying cachexia, which recapitulate key features of the PDAC disease process and induce a wide array of cachexia manifestations. This model is therefore ideally suited for future studies exploring the physiological systems involved in cachexia and for preclinical studies of novel therapies.
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Affiliation(s)
| | - Xinxia Zhu
- Papé Family Pediatric Research InstituteOregon Health and Science UniversityPortlandUSA
| | - Kevin G. Burfeind
- Medical Scientist Training ProgramOregon Health and Science UniversityPortlandUSA
| | - Stephanie M. Krasnow
- Papé Family Pediatric Research InstituteOregon Health and Science UniversityPortlandUSA
| | - Peter R. Levasseur
- Papé Family Pediatric Research InstituteOregon Health and Science UniversityPortlandUSA
| | - Terry K. Morgan
- Departments of Pathology and Obstetrics and GynecologyOregon Health and Science UniversityPortlandUSA
| | - Daniel L. Marks
- Papé Family Pediatric Research InstituteOregon Health and Science UniversityPortlandUSA
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Nonmuscle Tissues Contribution to Cancer Cachexia. Mediators Inflamm 2015; 2015:182872. [PMID: 26523094 PMCID: PMC4615210 DOI: 10.1155/2015/182872] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 03/26/2015] [Indexed: 01/05/2023] Open
Abstract
Cachexia is a syndrome associated with cancer, characterized by body weight loss, muscle and adipose tissue wasting, and inflammation, being often associated with anorexia. In spite of the fact that muscle tissue represents more than 40% of body weight and seems to be the main tissue involved in the wasting that occurs during cachexia, recent developments suggest that tissues/organs such as adipose (both brown and white), brain, liver, gut, and heart are directly involved in the cachectic process and may be responsible for muscle wasting. This suggests that cachexia is indeed a multiorgan syndrome. Bearing all this in mind, the aim of the present review is to examine the impact of nonmuscle tissues in cancer cachexia.
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Toledo M, Springer J, Busquets S, Tschirner A, López-Soriano FJ, Anker SD, Argilés JM. Formoterol in the treatment of experimental cancer cachexia: effects on heart function. J Cachexia Sarcopenia Muscle 2014; 5:315-20. [PMID: 25167857 PMCID: PMC4248407 DOI: 10.1007/s13539-014-0153-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 06/02/2014] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND AND AIMS Formoterol is a highly potent β2-adrenoceptor-selective agonist, which is a muscle growth promoter in many animal species, resulting in skeletal muscle hypertrophy. Previous studies carried out in our laboratory have shown that formoterol treatment in tumour-bearing animals resulted in an amelioration of muscle loss through different mechanisms that include muscle apoptosis and proteolysis. METHODS The study presented involved rats bearing the Yoshida AH-130 ascites tumour model-which induces a high degree of cachexia-treated with the beta-2 agonist formoterol (0.3 mg/kg BW). RESULTS The administration of formoterol to cachectic tumour-bearing rats resulted in a significant reduction of muscle weight loss. The treatment also increased lean body mass and body water. The treatment, however, did not influence heart weight, which was much decreased as a result of tumour burden. Untreated tumour-bearing rats showed important changes in parameters related with heart function:, left ventricle (LV) ejection fraction, fractional shortening, LV diameter and volume (diastolic) and LV stroke volume, LV mass and posterior wall thickness (PWT) (both systolic and diastolic). The administration of formoterol affected LV diameter and volume, LV stroke volume and LV mass. CONCLUSIONS The results suggest that formoterol treatment, in addition to reducing muscle wasting, does not negatively alter heart function-in fact, some cardiac parameters are improved-in animals affected by cancer cachexia.
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Affiliation(s)
- Míriam Toledo
- Cancer Research Group, Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028, Barcelona, Spain
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Abstract
BACKGROUND Neuroendocrine tumors (NETs) of the abdomen are rare tumors with an incidence of 3.56 per 100,000 in the general population. Obesity is a growing public health problem with varying effects on severity of other disease. We investigated the association between obesity and inpatient morbidity/mortality in patients with abdominal neuroendocrine tumors utilizing the Nationwide Inpatient Sample (NIS). METHODS We analyzed data from the NIS database to investigate the association between obesity and abdominal NETs using patient information from 22,096 patient-discharges from January 1, 2009 to December 31, 2010. RESULTS We demonstrate that obesity is strongly associated with decreased rates of inpatient mortality in patients with NET (OR = 0.6, multivariate P = 0.02) and that malnutrition is associated with nearly 5-fold higher odds of inpatient mortality (multivariate P < 0.0005). We did not find a statistical interaction between obesity and malnutrition; however, patients who were both malnourished and obese had a lower association with mortality risk than purely malnourished patients. CONCLUSIONS Our data suggests that nutritional status may be an important factor in inpatient mortality in patients with NETs with obesity being protective.
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Affiliation(s)
- Evan Glazer
- 1 Department of Surgery, The University of Arizona
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Kazemi-Bajestani SMR, Becher H, Fassbender K, Chu Q, Baracos VE. Concurrent evolution of cancer cachexia and heart failure: bilateral effects exist. J Cachexia Sarcopenia Muscle 2014; 5:95-104. [PMID: 24627226 PMCID: PMC4053562 DOI: 10.1007/s13539-014-0137-y] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Accepted: 02/10/2014] [Indexed: 12/12/2022] Open
Abstract
Cancer cachexia is defined as a multifactorial syndrome of involuntary weight loss characterized by an ongoing loss of skeletal muscle mass and progressive functional impairment. It is postulated that cardiac dysfunction/atrophy parallels skeletal muscle atrophy in cancer cachexia. Cardiotoxic chemotherapy may additionally result in cardiac dysfunction and heart failure in some cancer patients. Heart failure thus may be a consequence of either ongoing cachexia or chemotherapy-induced cardiotoxicity; at the same time, heart failure can result in cachexia, especially muscle wasting. Therefore, the subsequent heart failure and cardiac cachexia can exacerbate the existing cancer-induced cachexia. We discuss these bilateral effects between cancer cachexia and heart failure in cancer patients. Since cachectic patients are more susceptible to chemotherapy-induced toxicity overall, this may also include increased cardiotoxicity of antineoplastic agents. Patients with cachexia could thus be doubly unfortunate, with cachexia-related cardiac dysfunction/heart failure and increased susceptibility to cardiotoxicity during treatment. Cardiovascular risk factors as well as pre-existing heart failure seem to exacerbate cardiac susceptibility against cachexia and increase the rate of cardiac cachexia. Hence, chemotherapy-induced cardiotoxicity, cardiovascular risk factors, and pre-existing heart failure may accelerate the vicious cycle of cachexia-heart failure. The impact of cancer cachexia on cardiac dysfunction/heart failure in cancer patients has not been thoroughly studied. A combination of serial echocardiography for detection of cachexia-induced cardiac remodeling and computed tomography image analysis for detection of skeletal muscle wasting would appear a practical and non-invasive approach to develop an understanding of cardiac structural/functional alterations that are directly related to cachexia.
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Affiliation(s)
| | - Harald Becher
- />Department of Medicine, Division of Cardiology, Alberta Cardiovascular and Stroke Research Centre, University of Alberta, Edmonton, Canada
| | - Konrad Fassbender
- />Department of Oncology, Division of Palliative Care Medicine, University of Alberta, Edmonton, Canada
| | - Quincy Chu
- />Department of Oncology, Division of Medical Oncology, Cross Cancer Institute, University of Alberta, Edmonton, Canada
| | - Vickie E. Baracos
- />Department of Oncology, Division of Palliative Care Medicine, University of Alberta, Edmonton, Canada
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Couch ME, Dittus K, Toth MJ, Willis MS, Guttridge DC, George JR, Barnes CA, Gourin CG, Der-Torossian H. Cancer cachexia update in head and neck cancer: Definitions and diagnostic features. Head Neck 2014; 37:594-604. [DOI: 10.1002/hed.23599] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 10/21/2013] [Accepted: 01/07/2014] [Indexed: 11/11/2022] Open
Affiliation(s)
- Marion E. Couch
- Division of Otolaryngology - Head and Neck Surgery; Department of Surgery; Vermont Cancer Center; University of Vermont, College of Medicine; Burlington Vermont
| | - Kim Dittus
- Division of Hematology - Oncology; Department of Medicine; Vermont Cancer Center; University of Vermont, College of Medicine; Burlington Vermont
| | - Michael J. Toth
- Department of Molecular Physiology and Biophysics; University of Vermont, College of Medicine; Burlington Vermont
| | - Monte S. Willis
- Department of Pathology and Laboratory Medicine; McAllister Heart Institute; University of North Carolina; Chapel Hill North Carolina
| | - Denis C. Guttridge
- Department of Molecular Virology; Immunology; and Medical Genetics; Ohio State University; Columbus Ohio
| | - Jonathan R. George
- Department of Otolaryngology - Head and Neck Surgery; University of California; San Francisco California
| | - Christie A. Barnes
- Division of Otolaryngology - Head and Neck Surgery; Department of Surgery; Vermont Cancer Center; University of Vermont, College of Medicine; Burlington Vermont
| | - Christine G. Gourin
- Department of Otolaryngology - Head and Neck Surgery; Johns Hopkins University; Baltimore Maryland
| | - Hirak Der-Torossian
- Division of Otolaryngology - Head and Neck Surgery; Department of Surgery; Vermont Cancer Center; University of Vermont, College of Medicine; Burlington Vermont
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Martinez-Outschoorn U, Sotgia F, Lisanti MP. Tumor microenvironment and metabolic synergy in breast cancers: critical importance of mitochondrial fuels and function. Semin Oncol 2014; 41:195-216. [PMID: 24787293 DOI: 10.1053/j.seminoncol.2014.03.002] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Metabolic synergy or metabolic coupling between glycolytic stromal cells (Warburg effect) and oxidative cancer cells occurs in human breast cancers and promotes tumor growth. The Warburg effect or aerobic glycolysis is the catabolism of glucose to lactate to obtain adenosine triphosphate (ATP). This review summarizes the main findings on this stromal metabolic phenotype, and the associated signaling pathways, as well as the critical role of oxidative stress and autophagy, all of which promote carcinoma cell mitochondrial metabolism and tumor growth. Loss of Caveolin 1 (Cav-1) and the upregulation of monocarboxylate transporter 4 (MCT4) in stromal cells are novel markers of the Warburg effect and metabolic synergy between stromal and carcinoma cells. MCT4 and Cav-1 are also breast cancer prognostic biomarkers. Reactive oxygen species (ROS) are key mediators of the stromal Warburg effect. High ROS also favors cancer cell mitochondrial metabolism and tumorigenesis, and anti-oxidants can reverse this altered stromal and carcinoma metabolism. A pseudo-hypoxic state with glycolysis and low mitochondrial metabolism in the absence of hypoxia is a common feature in breast cancer. High ROS induces loss of Cav-1 in stromal cells and is sufficient to generate a pseudo-hypoxic state. Loss of Cav-1 in the stroma drives glycolysis and lactate extrusion via HIF-1α stabilization and the upregulation of MCT4. Stromal cells with loss of Cav-1 and/or high expression of MCT4 also show a catabolic phenotype, with enhanced macroautophagy. This catabolic state in stromal cells is driven by hypoxia-inducible factor (HIF)-1α, nuclear factor κB (NFκB), and JNK activation and high ROS generation. A feed-forward loop in stromal cells regulates pseudo-hypoxia and metabolic synergy, with Cav-1, MCT4, HIF-1α, NFκB, and ROS as its key elements. Metabolic synergy also may occur between cancer cells and cells in distant organs from the tumor. Cancer cachexia, which is due to severe organismal metabolic dysregulation in myocytes and adipocytes, shares similarities with stromal-carcinoma metabolic synergy, as well. In summary, metabolic synergy occurs when breast carcinoma cells induce a nutrient-rich microenvironment to promote tumor growth. The process of tumor metabolic synergy is a multistep process, due to the generation of ROS, and the induction of catabolism with autophagy, mitophagy and glycolysis. Studying epithelial-stromal interactions and metabolic synergy is important to better understand the ecology of cancer and the metabolic role of different cell types in tumor progression.
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Affiliation(s)
| | - Federica Sotgia
- University of Manchester, Manchester Breast Centre & Breakthrough Breast Cancer Research Unit, Manchester, United Kingdom
| | - Michael P Lisanti
- University of Manchester, Manchester Breast Centre & Breakthrough Breast Cancer Research Unit, Manchester, United Kingdom
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