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Babic M, Veljovic K, Popović N, Golic N, Radojkovic D, Stankovic M. Antioxidant effect of lactic acid bacteria in human bronchial epithelial cells exposed to cigarette smoke. J Appl Microbiol 2023; 134:lxad257. [PMID: 37951288 DOI: 10.1093/jambio/lxad257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 10/03/2023] [Accepted: 11/09/2023] [Indexed: 11/13/2023]
Abstract
AIMS Chronic lung diseases are a major and increasing global health problem, commonly caused by cigarette smoke. We aimed to explore the antioxidant effects of lactic acid bacteria (LAB) against cigarette smoke in bronchial epithelial cells. METHODS AND RESULTS The antioxidant effects of 21 heat-killed (HK) LAB strains were tested in cigarette smoke-stimulated BEAS-2B cells and 3-D bronchospheres organoids. We showed that HK Lactiplantibacillus plantarum BGPKM22 possesses antioxidant activity against cigarette smoke, resistance to hydrogen peroxide, and free radical neutralizing activity. We demonstrated that HK BGPKM22 inhibited cigarette smoke-induced expression of the Aryl hydrocarbon receptor (AhR) and Nuclear factor erythroid 2 related factor 2 (Nrf2) genes. The cell-free supernatant (SN) of BGPKM22 fully confirmed the effects of HK BGPKM22. CONCLUSIONS For the first time, we revealed that HK and SN of Lactip. plantarum BGPKM22 possess antioxidant activity and modulate AhR and Nrf2 gene expression in bronchial epithelial cells exposed to cigarette smoke.
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Affiliation(s)
- Mirjana Babic
- Laboratory for Molecular Biology, Group for Molecular Biology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, 11042 Belgrade, Republic of Serbia
| | - Katarina Veljovic
- Laboratory for Molecular Microbiology, Group for Probiotics and Microbiota-Host Interaction, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, 11042 Belgrade, Republic of Serbia
| | - Nikola Popović
- Laboratory for Molecular Microbiology, Group for Probiotics and Microbiota-Host Interaction, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, 11042 Belgrade, Republic of Serbia
| | - Natasa Golic
- Laboratory for Molecular Microbiology, Group for Probiotics and Microbiota-Host Interaction, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, 11042 Belgrade, Republic of Serbia
| | - Dragica Radojkovic
- Laboratory for Molecular Biology, Group for Molecular Biology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, 11042 Belgrade, Republic of Serbia
| | - Marija Stankovic
- Laboratory for Molecular Biology, Group for Molecular Biology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, 11042 Belgrade, Republic of Serbia
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2
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Ramesh PS, Bovilla VR, Swamy VH, Manoli NN, Dasegowda KB, Siddegowda SM, Chandrashekarappa S, Somasundara VM, Kabekkodu SP, Rajesh R, Devegowda D, Thimmulappa RK. Human papillomavirus-driven repression of NRF2 signalling confers chemo-radio sensitivity and predicts prognosis in head and neck squamous cell carcinoma. Free Radic Biol Med 2023; 205:234-243. [PMID: 37328018 DOI: 10.1016/j.freeradbiomed.2023.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/17/2023] [Accepted: 06/13/2023] [Indexed: 06/18/2023]
Abstract
PURPOSE To investigate the role of NRF2 signalling in conferring superior prognosis in patients with HPV positive (HPV+ve) head & neck squamous cell carcinomas (HNSCC) compared to HPV negative (HPV-ve) HNSCC and develop molecular markers for selection of HPV+ve HNSCC patients for treatment de-escalation trials. METHODS NRF2 activity (NRF2, KEAP1, and NRF2-transcriptional targets), p16, and p53 levels between HPV+ve HNSCC and HPV-ve HNSCC in prospective and retrospective tumor samples as well as from TCGA database were compared. Cancer cells were transfected with HPV-E6/E7 plasmid to elucidate if HPV infection represses NRF2 activity and sensitizes to chemo-radiotherapy. RESULTS Prospective analysis revealed a marked reduction in expression of NRF2, and its downstream genes in HPV+ve tumors compared to HPV-ve tumors. A retrospective analysis by IHC revealed significantly lower NQO1 in p16high tumors compared to p16low tumors and the NQO1 expression correlated negatively with p16 and positively with p53. Analysis of the TCGA database confirmed low constitutive NRF2 activity in HPV+ve HNSCC compared to HPV-ve HNSCC and revealed that HPV+ve HNSCC patients with 'low NQO1' expression showed better overall survival compared to HPV+ve HNSCC patients with 'high NQO1' expression. Ectopic expression of HPV-E6/E7 plasmid in various cancer cells repressed constitutive NRF2 activity, reduced total GSH, increased ROS levels, and sensitized the cancer cells to cisplatin and ionizing radiation. CONCLUSION Low constitutive NRF2 activity contributes to better prognosis of HPV+ve HNSCC patients. Co-expression of p16high, NQO1low, and p53low could serve as a predictive biomarker for the selection of HPV + ve HNSCC patients for de-escalation trials.
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Affiliation(s)
- Pushkal S Ramesh
- Center of Excellence in Molecular Biology and Regenerative Medicine, Department of Biochemistry, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India.
| | - Venugopal R Bovilla
- Center of Excellence in Molecular Biology and Regenerative Medicine, Department of Biochemistry, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India.
| | - Vikas H Swamy
- School of Life Sciences, JSS Academy of Higher Education & Research, Mysuru, India.
| | - Nandini N Manoli
- Department of Pathology, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India.
| | | | | | - Shilpa Chandrashekarappa
- Department of Otorhinolaryngology, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India.
| | | | - Shama P Kabekkodu
- Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India.
| | - R Rajesh
- Department of Radiotherapy, Narayana Multispeciality Hospital, Mysuru, India.
| | - Devanand Devegowda
- Center of Excellence in Molecular Biology and Regenerative Medicine, Department of Biochemistry, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India.
| | - Rajesh K Thimmulappa
- Center of Excellence in Molecular Biology and Regenerative Medicine, Department of Biochemistry, JSS Medical College, JSS Academy of Higher Education & Research, Mysuru, India.
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3
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DeBlasi JM, Falzone A, Caldwell S, Prieto-Farigua N, Prigge JR, Schmidt EE, Chio IIC, Karreth FA, DeNicola GM. Distinct Nrf2 Signaling Thresholds Mediate Lung Tumor Initiation and Progression. Cancer Res 2023; 83:1953-1967. [PMID: 37062029 PMCID: PMC10267679 DOI: 10.1158/0008-5472.can-22-3848] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/03/2023] [Accepted: 04/12/2023] [Indexed: 04/17/2023]
Abstract
Mutations in the KEAP1-NRF2 (Kelch-like ECH-associated protein 1-nuclear factor-erythroid 2 p45-related factor 2) pathway occur in up to a third of non-small cell lung cancer (NSCLC) cases and often confer resistance to therapy and poor outcomes. Here, we developed murine alleles of the KEAP1 and NRF2 mutations found in human NSCLC and comprehensively interrogated their impact on tumor initiation and progression. Chronic NRF2 stabilization by Keap1 or Nrf2 mutation was not sufficient to induce tumorigenesis, even in the absence of tumor suppressors, p53 or LKB1. When combined with KrasG12D/+, constitutive NRF2 activation promoted lung tumor initiation and early progression of hyperplasia to low-grade tumors but impaired their progression to advanced-grade tumors, which was reversed by NRF2 deletion. Finally, NRF2 overexpression in KEAP1 mutant human NSCLC cell lines was detrimental to cell proliferation, viability, and anchorage-independent colony formation. Collectively, these results establish the context-dependence and activity threshold for NRF2 during the lung tumorigenic process. SIGNIFICANCE Stabilization of the transcription factor NRF2 promotes oncogene-driven tumor initiation but blocks tumor progression, indicating distinct, threshold-dependent effects of the KEAP1/NRF2 pathway in different stages of lung tumorigenesis.
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Affiliation(s)
- Janine M. DeBlasi
- Department of Metabolism & Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
- Cancer Biology PhD Program, University of South Florida, Tampa, Florida
| | - Aimee Falzone
- Department of Metabolism & Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Samantha Caldwell
- Department of Metabolism & Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Nicolas Prieto-Farigua
- Department of Metabolism & Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Justin R. Prigge
- Microbiology & Cell Biology Department, Montana State University, Bozeman, Montana
| | - Edward E. Schmidt
- Microbiology & Cell Biology Department, Montana State University, Bozeman, Montana
| | - Iok In Christine Chio
- Department of Genetics and Development, Institute for Cancer Genetics, Columbia University Irving Medical Center, New York, New York
- Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, New York
| | - Florian A. Karreth
- Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
| | - Gina M. DeNicola
- Department of Metabolism & Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida
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4
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Sierra-Vargas MP, Montero-Vargas JM, Debray-García Y, Vizuet-de-Rueda JC, Loaeza-Román A, Terán LM. Oxidative Stress and Air Pollution: Its Impact on Chronic Respiratory Diseases. Int J Mol Sci 2023; 24:853. [PMID: 36614301 PMCID: PMC9821141 DOI: 10.3390/ijms24010853] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 01/05/2023] Open
Abstract
Redox regulation participates in the control of various aspects of metabolism. Reactive oxygen and nitrogen species participate in many reactions under physiological conditions. When these species overcome the antioxidant defense system, a distressed status emerges, increasing biomolecular damage and leading to functional alterations. Air pollution is one of the exogenous sources of reactive oxygen and nitrogen species. Ambient airborne particulate matter (PM) is important because of its complex composition, which includes transition metals and organic compounds. Once in contact with the lungs' epithelium, PM components initiate the synthesis of inflammatory mediators, macrophage activation, modulation of gene expression, and the activation of transcription factors, which are all related to the physiopathology of chronic respiratory diseases, including cancer. Even though the pathophysiological pathways that give rise to the development of distress and biological damage are not fully understood, scientific evidence indicates that redox-dependent signaling pathways are involved. This article presents an overview of the redox interaction of air pollution inside the human body and the courses related to chronic respiratory diseases.
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Affiliation(s)
- Martha Patricia Sierra-Vargas
- Departmento de Investigación en Toxicología y Medicina Ambiental, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas (INER), Ciudad de México 14080, Mexico
| | - Josaphat Miguel Montero-Vargas
- Departmento de Investigación en Inmunogenética y Alergia, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas (INER), Ciudad de México 14080, Mexico
| | - Yazmín Debray-García
- Departmento de Investigación en Toxicología y Medicina Ambiental, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas (INER), Ciudad de México 14080, Mexico
| | - Juan Carlos Vizuet-de-Rueda
- Departmento de Investigación en Inmunogenética y Alergia, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas (INER), Ciudad de México 14080, Mexico
| | - Alejandra Loaeza-Román
- Departmento de Investigación en Toxicología y Medicina Ambiental, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas (INER), Ciudad de México 14080, Mexico
| | - Luis M. Terán
- Departmento de Investigación en Inmunogenética y Alergia, Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas (INER), Ciudad de México 14080, Mexico
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Yaylım İ, Farooqi AA, Telkoparan-Akillilar P, Saso L. Interplay between Non-Coding RNAs and NRF2 in Different Cancers: Spotlight on MicroRNAs and Long Non-Coding RNAs. J Pharmacol Exp Ther 2023; 384:28-34. [PMID: 35667688 DOI: 10.1124/jpet.121.000921] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 04/19/2022] [Accepted: 04/25/2022] [Indexed: 01/12/2023] Open
Abstract
Cancer is a multifactorial disease, and a wealth of information has enabled basic and clinical researchers to develop a better conceptual knowledge of the highly heterogeneous nature of cancer. Deregulations of spatio-temporally controlled transduction pathways play a central role in cancer progression. NRF2-driven signaling has engrossed significant attention because of its fundamentally unique features to dualistically regulate cancer progression. Context-dependent diametrically opposed roles of NRF2-induced signaling are exciting. More importantly, non-coding RNA (ncRNA) mediated regulation of NRF2 and interplay between NRF2 and ncRNAs have added new layers of complexity to already intricate nature of NRF2 signaling. There is a gradual enrichment in the existing pool of knowledge related to interplay between microRNAs (miRNAs) and long non-coding RNAs (lncRNAs) in different cancers. However, surprisingly, there are no clues about interplay between circular RNAs and NRF2 in various cancers. Therefore, future studies must converge on the functional characterization of additional important lncRNAs and circular RNAs, which regulated NRF2-driven signaling or, conversely, NRF2 transcriptionally controlled their expression to regulate various stages of cancer. SIGNIFICANCE STATEMENT: Recently, many researchers have focused on the NRF2-driven signaling in cancer progression. Excitingly, discovery of non-coding RNAs has added new layers of intricacy to the already complicated nature of KEAP1/NRF2 signaling in different cancers. These interactions are shaping the NRF2-driven signaling landscape, and better knowledge of these pathways will be advantageous in pharmacological modulation of non-coding RNA-mediated NRF2 signaling in various cancers.
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Affiliation(s)
- İlhan Yaylım
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey (I.Y.); Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan (A.A.F.); Department of Medical Biology, Faculty of Medicine, Yuksek Ihtisas University, Ankara, Turkey (P.T.-A.); and Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy (L.S.)
| | - Ammad Ahmad Farooqi
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey (I.Y.); Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan (A.A.F.); Department of Medical Biology, Faculty of Medicine, Yuksek Ihtisas University, Ankara, Turkey (P.T.-A.); and Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy (L.S.)
| | - Pelin Telkoparan-Akillilar
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey (I.Y.); Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan (A.A.F.); Department of Medical Biology, Faculty of Medicine, Yuksek Ihtisas University, Ankara, Turkey (P.T.-A.); and Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy (L.S.)
| | - Luciano Saso
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey (I.Y.); Institute of Biomedical and Genetic Engineering (IBGE), Islamabad, Pakistan (A.A.F.); Department of Medical Biology, Faculty of Medicine, Yuksek Ihtisas University, Ankara, Turkey (P.T.-A.); and Department of Physiology and Pharmacology, Sapienza University of Rome, Rome, Italy (L.S.)
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6
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Sadrkhanloo M, Entezari M, Orouei S, Zabolian A, Mirzaie A, Maghsoudloo A, Raesi R, Asadi N, Hashemi M, Zarrabi A, Khan H, Mirzaei S, Samarghandian S. Targeting Nrf2 in ischemia-reperfusion alleviation: From signaling networks to therapeutic targeting. Life Sci 2022; 300:120561. [PMID: 35460707 DOI: 10.1016/j.lfs.2022.120561] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Revised: 03/28/2022] [Accepted: 04/13/2022] [Indexed: 12/15/2022]
Abstract
The nuclear factor erythroid 2-related factor 2 (Nrf2) is a master regulator of redox balance and it responds to various cell stresses that oxidative stress is the most well-known one. The Nrf2 should undergo nuclear translocation to exert its protective impacts and decrease ROS production. On the other hand, ischemic/reperfusion (I/R) injury is a pathological event resulting from low blood flow to an organ and followed by reperfusion. The I/R induces cell injury and organ dysfunction. The present review focuses on Nrf2 function in alleviation of I/R injury. Stimulating of Nrf2 signaling ameliorates I/R injury in various organs including lung, liver, brain, testis and heart. The Nrf2 enhances activity of antioxidant enzymes to reduce ROS production and prevent oxidative stress-mediated cell death. Besides, Nrf2 reduces inflammation via decreasing levels of pro-inflammatory factors including IL-6, IL-1β and TNF-α. Nrf2 signaling is beneficial in preventing apoptosis and increasing cell viability. Nrf2 induces autophagy to prevent apoptosis during I/R injury. Furthermore, it can interact with other molecular pathways including PI3K/Akt, NF-κB, miRNAs, lncRNAs and GSK-3β among others, to ameliorate I/R injury. The therapeutic agents, most of them are phytochemicals such as resveratrol, berberine and curcumin, induce Nrf2 signaling in I/R injury alleviation.
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Affiliation(s)
| | - Maliheh Entezari
- Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Farhikhtegan Medical Convergence sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Sima Orouei
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Amirhossein Zabolian
- Resident of Orthopedics, Department of Orthopedics, School of Medicine, 5th Azar Hospital, Golestan University of Medical Sciences, Golestan, Iran.
| | - Amirreza Mirzaie
- Young Researchers and Elite Club, Damghan Branch, Islamic Azad University, Damghan, Iran
| | - Amin Maghsoudloo
- Young Researchers and Elite Club, Damghan Branch, Islamic Azad University, Damghan, Iran
| | - Rasoul Raesi
- Mashhad University of Medical Sciences, Mashhad, Iran
| | - Neda Asadi
- Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Farhikhtegan Medical Convergence sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mehrdad Hashemi
- Farhikhtegan Medical Convergence sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Ali Zarrabi
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Istinye University, Sariyer, Istanbul 34396, Turkey.
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University Mardan, 23200, Pakistan
| | - Sepideh Mirzaei
- Department of Biology, Faculty of Science, Islamic Azad University, Science and Research Branch, Tehran, Iran.
| | - Saeed Samarghandian
- Healthy Ageing Research Centre, Neyshabur University of Medical Sciences, Neyshabur, Iran.
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Scarborough JA, Scott JG. Translation of Precision Medicine Research Into Biomarker-Informed Care in Radiation Oncology. Semin Radiat Oncol 2022; 32:42-53. [PMID: 34861995 PMCID: PMC8667861 DOI: 10.1016/j.semradonc.2021.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The reach of personalized medicine in radiation oncology has expanded greatly over the past few decades as technical precision has improved the delivery of radiation to each patient's unique anatomy. Yet, the consideration of biological heterogeneity between patients has largely not been translated to clinical care. There are innumerable promising advancements in the discovery and validation of biomarkers, which could be used to alter radiation therapy directly or indirectly. Directly, biomarker-informed care may alter treatment dose or identify patients who would benefit most from radiation therapy and who could safely avoid more aggressive care. Indirectly, a variety of biomarkers could assist with choosing the best radiosensitizing chemotherapies. The translation of these advancements into clinical practice will bring radiation oncology even further into the era of precision medicine, treating patients according to their unique anatomical and biological differences.
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Affiliation(s)
- Jessica A Scarborough
- Translational Hematology and Oncology Research Department, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland,OH; Systems Biology and Bioinformatics Program, School of Medicine, Case Western Reserve University, Cleveland, OH
| | - Jacob G Scott
- Translational Hematology and Oncology Research Department, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland,OH; Radiation Oncology Department, Taussig Cancer Institute, Cleveland Clinic Foundation, 10201 Carnegie Ave, Cleveland, OH.
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DeNicola GM, Shackelford DB. Metabolic Phenotypes, Dependencies, and Adaptation in Lung Cancer. Cold Spring Harb Perspect Med 2021; 11:a037838. [PMID: 34127512 PMCID: PMC8559540 DOI: 10.1101/cshperspect.a037838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Lung cancer is a heterogeneous disease that is subdivided into histopathological subtypes with distinct behaviors. Each subtype is characterized by distinct features and molecular alterations that influence tumor metabolism. Alterations in tumor metabolism can be exploited by imaging modalities that use metabolite tracers for the detection and characterization of tumors. Microenvironmental factors, including nutrient and oxygen availability and the presence of stromal cells, are a critical influence on tumor metabolism. Recent technological advances facilitate the direct evaluation of metabolic alterations in patient tumors in this complex microenvironment. In addition, molecular alterations directly influence tumor cell metabolism and metabolic dependencies that influence response to therapy. Current therapeutic approaches to target tumor metabolism are currently being developed and translated into the clinic for patient therapy.
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Affiliation(s)
- Gina M DeNicola
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, USA
| | - David B Shackelford
- Division of Pulmonary and Critical Care Medicine, David Geffen School of Medicine at the University of California, Los Angeles, California 90095, USA
- Jonsson Comprehensive Cancer Center, David Geffen School of Medicine at the University of California, Los Angeles, California 90095, USA
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