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Hu Y, Tang J, Xu Q, Fang Z, Li R, Yang M, Zhao J, Chen X. Role of pyruvate kinase M2 in regulating sepsis (Review). Mol Med Rep 2024; 30:185. [PMID: 39155878 DOI: 10.3892/mmr.2024.13309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Accepted: 07/29/2024] [Indexed: 08/20/2024] Open
Abstract
Glycolysis occurs in all living organisms as a form of energy supply. Pyruvate kinase M2 (PKM2) is one of the rate‑limiting enzymes in the glycolytic process. PKM2 is considered to serve an important role in several terminal diseases, including sepsis. However, to the best of our knowledge, the specific mechanistic role of PKM2 in sepsis remains to be systematically summarised. Therefore, the present review aims to summarise the roles of PKM2 in sepsis progression. In addition, potential treatment strategies for patients with sepsis are discussed. The present review hopes to lay the groundwork for studying the role of PKM2 and developing therapeutic strategies against metabolic disorders that occur during sepsis.
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Affiliation(s)
- Yifei Hu
- Department of Clinical Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang 321000, P.R. China
| | - Jing Tang
- Department of Clinical Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang 321000, P.R. China
| | - Qiao Xu
- Department of Clinical Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang 321000, P.R. China
| | - Zenghui Fang
- Department of Clinical Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang 321000, P.R. China
| | - Rongqing Li
- Department of Clinical Medicine, Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu 225000, P.R. China
| | - Mengxuan Yang
- Department of Clinical Laboratory, School of Laboratory Medicine and Bioengineering, Hangzhou Medical College, Hangzhou, Zhejiang 310000, P.R. China
| | - Jie Zhao
- Department of Clinical Medicine, Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, Jiangsu 225000, P.R. China
| | - Xin Chen
- Department of Clinical Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, Zhejiang 321000, P.R. China
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2
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Holling GA, Chavel CA, Sharda AP, Lieberman MM, James CM, Lightman SM, Tong JH, Qiao G, Emmons TR, Giridharan T, Hou S, Intlekofer AM, Higashi RM, Fan TWM, Lane AN, Eng KH, Segal BH, Repasky EA, Lee KP, Olejniczak SH. CD8+ T cell metabolic flexibility elicited by CD28-ARS2 axis-driven alternative splicing of PKM supports antitumor immunity. Cell Mol Immunol 2024; 21:260-274. [PMID: 38233562 PMCID: PMC10902291 DOI: 10.1038/s41423-024-01124-2] [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: 07/14/2023] [Accepted: 12/26/2023] [Indexed: 01/19/2024] Open
Abstract
Metabolic flexibility has emerged as a critical determinant of CD8+ T-cell antitumor activity, yet the mechanisms driving the metabolic flexibility of T cells have not been determined. In this study, we investigated the influence of the nuclear cap-binding complex (CBC) adaptor protein ARS2 on mature T cells. In doing so, we discovered a novel signaling axis that endows activated CD8+ T cells with flexibility of glucose catabolism. ARS2 upregulation driven by CD28 signaling reinforced splicing factor recruitment to pre-mRNAs and affected approximately one-third of T-cell activation-induced alternative splicing events. Among these effects, the CD28-ARS2 axis suppressed the expression of the M1 isoform of pyruvate kinase in favor of PKM2, a key determinant of CD8+ T-cell glucose utilization, interferon gamma production, and antitumor effector function. Importantly, PKM alternative splicing occurred independently of CD28-driven PI3K pathway activation, revealing a novel means by which costimulation reprograms glucose metabolism in CD8+ T cells.
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Affiliation(s)
- G Aaron Holling
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Colin A Chavel
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Anand P Sharda
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Mackenzie M Lieberman
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Caitlin M James
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Shivana M Lightman
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Jason H Tong
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Guanxi Qiao
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Dana Farber Cancer Institute, Boston, MA, 02215, USA
| | - Tiffany R Emmons
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Massachusetts Institute of Technology, Boston, MA, 02139, USA
| | - Thejaswini Giridharan
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Shengqi Hou
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Andrew M Intlekofer
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA
| | - Richard M Higashi
- Center for Environmental Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, Lexington, KY, 40536, USA
| | - Teresa W M Fan
- Center for Environmental Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, Lexington, KY, 40536, USA
| | - Andrew N Lane
- Center for Environmental Systems Biochemistry, Department of Toxicology and Cancer Biology and Markey Cancer Center, Lexington, KY, 40536, USA
| | - Kevin H Eng
- Department of Cancer Genetics and Genomics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Brahm H Segal
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Elizabeth A Repasky
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
| | - Kelvin P Lee
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Department of Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA
- Melvin and Bren Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Scott H Olejniczak
- Department of Immunology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA.
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3
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Wan R, Yao P, Wang Y, Zhang L, Guo W, Du M, Wang Y, Shi W, Li W. Autophagy-related biomarkers in preeclampsia: the underlying mechanism, correlation to the immune microenvironment and drug screening. BMC Pregnancy Childbirth 2024; 24:1. [PMID: 38166707 PMCID: PMC10759589 DOI: 10.1186/s12884-023-06211-2] [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: 10/11/2023] [Accepted: 12/17/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Preeclampsia is a life-threatening disease of pregnancy that lacks effective pharmaceuticals which can target its pathogenesis. Since preeclampsia involves complex pathological processes, including autophagy, this study aims to explore autophagy-related mechanisms of preeclampsia and to screen potential drugs. METHODS Firstly, the datasets GSE75010, GSE24129, GSE66273, and autophagic genes lists were downloaded from public databases. Then, a weighted gene co-expression network analysis (WGCNA) was applied to filter autophagic-related hub genes of preeclampsia. The differential expression levels of the hub genes were validated with datasets GSE24129 and GSE66273. Next, the GO and KEGG enrichment, protein-protein interacting (PPI) network, as well as the downstream pathways was analyzed via the starBase, STRING and Cytoscape to determine the functions and regulatory network of the hub genes. Additionally, the immune microenvironment of preeclampsia was investigated by the CIBERSORTX database. Finally, three herb ingredients, berberine, baicalein, and luteolin were screened by molecular docking in comparison to pravastatin, metformin, and aspirin, to predict potential drugs for treating preeclampsia. RESULTS A total of 54 autophagy-related genes were filtered by WGCNA. After filtering with |GS| > 0.5 and |MM| > 0.8, three hub genes, namely PKM, LEP, and HK2, were identified and validated. Among these genes, PKM and LEP were overexpressed in women older than 35 years old ( p<0.05; p<0.05); the expression of PKM, LEP, and HK2 differed remarkably in women with different BMI (all p<0.05); PKM overexpressed in women with hypertension (p<0.05). The regulatory network of hub genes demonstrated that they were mainly enriched in metabolic pathways, including the AMPK signaling pathway, glucagon signaling pathway, adipocytokine signaling pathway, and central carbon metabolism. Then, immune microenvironment analysis turned out that M2 macrophages were reduced in preeclampsia women (p<0.0001) and were negatively correlated with the expression of PKM (r=-0.2, p<0.05), LEP (r=-0.4, p<0.0001), and HK2 (r=-0.3, p<0.001). Lastly, molecular docking showed baicalein and luteolin could bind intimately to hub genes. CONCLUSION PKM, LEP, and HK2 could be promising biomarkers for preeclampsia, which might regulate the pathogenesis of preeclampsia via metabolism pathways and immune microenvironment. Baicalein and luteolin could be potential therapeutics for preeclampsia.
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Affiliation(s)
- Rui Wan
- Department of Obstetrics, Huanghe Sanmenxia Hospital Affiliated to Henan University of Science and Technology, Sanmenxia, China
| | - Peng Yao
- Department of Clinical Laboratory, Huanghe Sanmenxia Hospital Affiliated to Henan University of Science and Technology, Sanmenxia, China
| | - Yuxiu Wang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Lele Zhang
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Wei Guo
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Meiying Du
- Health Examination Center, Shanghai Children's Medical Center Hainan Branch, Shanghai Jiao Tong University School of Medicine, Sanya, China
| | - Yu Wang
- College of Chemical Engineering, Shijiazhuang University, Shijiazhuang, China.
| | - Wenbiao Shi
- Department of Obstetrics, Qujing Maternal and Child Health Hospital, Qujing, China.
| | - Weili Li
- Zhangjiang Center for Translational Medicine, Shanghai Biotecan Pharmaceuticals Co., Ltd, Shanghai, China.
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4
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Andrews MG, Pearson CA. Toward an understanding of glucose metabolism in radial glial biology and brain development. Life Sci Alliance 2024; 7:e202302193. [PMID: 37798120 PMCID: PMC10556723 DOI: 10.26508/lsa.202302193] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 09/20/2023] [Accepted: 09/26/2023] [Indexed: 10/07/2023] Open
Abstract
Decades of research have sought to determine the intrinsic and extrinsic mechanisms underpinning the regulation of neural progenitor maintenance and differentiation. A series of precise temporal transitions within progenitor cell populations generates all the appropriate neural cell types while maintaining a pool of self-renewing progenitors throughout embryogenesis. Recent technological advances have enabled us to gain new insights at the single-cell level, revealing an interplay between metabolic state and developmental progression that impacts the timing of proliferation and neurogenesis. This can have long-term consequences for the developing brain's neuronal specification, maturation state, and organization. Furthermore, these studies have highlighted the need to reassess the instructive role of glucose metabolism in determining progenitor cell division, differentiation, and fate. This review focuses on glucose metabolism (glycolysis) in cortical progenitor cells and the emerging focus on glycolysis during neurogenic transitions. Furthermore, we discuss how the field can learn from other biological systems to improve our understanding of the spatial and temporal changes in glycolysis in progenitors and evaluate functional neurological outcomes.
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Affiliation(s)
- Madeline G Andrews
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, AZ, USA
| | - Caroline A Pearson
- https://ror.org/02r109517 Center for Neurogenetics, Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, USA
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5
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Cimpean M, Cooper MA. Metabolic regulation of NK cell antiviral functions during cytomegalovirus infection. J Leukoc Biol 2023; 113:525-534. [PMID: 36843434 PMCID: PMC11262056 DOI: 10.1093/jleuko/qiad018] [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: 11/18/2022] [Revised: 01/23/2023] [Accepted: 02/09/2023] [Indexed: 02/28/2023] Open
Abstract
Natural killer (NK) cells quickly mount cytotoxic responses, produce cytokines, and proliferate in response to infected or transformed cells. Moreover, they can develop memory, with enhanced effector responses following activation, in some cases with antigen specificity. To optimally execute these functions, NK cells undergo metabolic reprogramming. Here, we discuss the interplay between metabolism and NK cell function in the context of viral infections. We review findings supporting metabolic regulation of NK cell effector functions, with a focus on NK cell antiviral infection in the context of cytomegalovirus in the mouse (MCMV) and human (HCMV).
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Affiliation(s)
- Maria Cimpean
- Department of Pediatrics, Division of Rheumatology/Immunology, Washington University in St. Louis, St. Louis, USA
| | - Megan A. Cooper
- Department of Pediatrics, Division of Rheumatology/Immunology, Washington University in St. Louis, St. Louis, USA
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6
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Osuna-Espinoza KY, Rosas-Taraco AG. Metabolism of NK cells during viral infections. Front Immunol 2023; 14:1064101. [PMID: 36742317 PMCID: PMC9889541 DOI: 10.3389/fimmu.2023.1064101] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 01/04/2023] [Indexed: 01/19/2023] Open
Abstract
Cellular metabolism is essential for the correct function of immune system cells, including Natural Killer cells (NK). These cells depend on energy to carry out their effector functions, especially in the early stages of viral infection. NK cells participate in the innate immune response against viruses and tumors. Their main functions are cytotoxicity and cytokine production. Metabolic changes can impact intracellular signals, molecule production, secretion, and cell activation which is essential as the first line of immune defense. Metabolic variations in different immune cells in response to a tumor or pathogen infection have been described; however, little is known about NK cell metabolism in the context of viral infection. This review summarizes the activation-specific metabolic changes in NK cells, the immunometabolism of NK cells during early, late, and chronic antiviral responses, and the metabolic alterations in NK cells in SARS-CoV2 infection. The modulation points of these metabolic routes are also discussed to explore potential new immunotherapies against viral infections.
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Affiliation(s)
- Kenia Y Osuna-Espinoza
- Faculty of Medicine, Department of Immunology, Universidad Autonoma de Nuevo Leon, Monterrey, Nuevo Leon, Mexico
| | - Adrián G Rosas-Taraco
- Faculty of Medicine, Department of Immunology, Universidad Autonoma de Nuevo Leon, Monterrey, Nuevo Leon, Mexico
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7
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PKM2 deficiency exacerbates gram-negative sepsis-induced cardiomyopathy via disrupting cardiac calcium homeostasis. Cell Death Dis 2022; 8:496. [PMID: 36564378 PMCID: PMC9789059 DOI: 10.1038/s41420-022-01287-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 12/13/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
Sepsis is a life-threatening syndrome with multi-organ dysfunction in critical care medicine. With the occurrence of sepsis-induced cardiomyopathy (SIC), characterized by reduced ventricular contractility, the mortality of sepsis is boosted to 70-90%. Pyruvate kinase M2 (PKM2) functions in a variety of biological processes and diseases other than glycolysis, and has been documented as a cardioprotective factor in several heart diseases. It is currently unknown whether PKM2 influences the development of SIC. Here, we found that PKM2 was upregulated in cardiomyocytes treated with LPS both in vitro and in vivo. Pkm2 inhibition exacerbated the LPS-induced cardiac damage to neonatal rat cardiomyocytes (NRCMs). Furthermore, cardiomyocytes lacking PKM2 aggravated LPS-induced cardiomyopathy, including myocardial damage and impaired contractility, whereas PKM2 overexpression and activation mitigated SIC. Mechanism investigation revealed that PKM2 interacted with sarcoplasmic/endoplasmic reticulum calcium ATPase 2a (SERCA2a), a key regulator of the excitation-contraction coupling, to maintain calcium homeostasis, and PKM2 deficiency exacerbated LPS-induced cardiac systolic dysfunction by impairing SERCA2a expression. In conclusion, these findings highlight that PKM2 plays an essential role in gram-negative sepsis-induced cardiomyopathy, which provides an attractive target for the prevention and treatment of septic cardiomyopathy.
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8
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Dong S, Li W, Li X, Wang Z, Chen Z, Shi H, He R, Chen C, Zhou W. Glucose metabolism and tumour microenvironment in pancreatic cancer: A key link in cancer progression. Front Immunol 2022; 13:1038650. [PMID: 36578477 PMCID: PMC9792100 DOI: 10.3389/fimmu.2022.1038650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/28/2022] [Indexed: 12/14/2022] Open
Abstract
Early and accurate diagnosis and treatment of pancreatic cancer (PC) remain challenging endeavors globally. Late diagnosis lag, high invasiveness, chemical resistance, and poor prognosis are unresolved issues of PC. The concept of metabolic reprogramming is a hallmark of cancer cells. Increasing evidence shows that PC cells alter metabolic processes such as glucose, amino acids, and lipids metabolism and require continuous nutrition for survival, proliferation, and invasion. Glucose metabolism, in particular, regulates the tumour microenvironment (TME). Furthermore, the link between glucose metabolism and TME also plays an important role in the targeted therapy, chemoresistance, radiotherapy ineffectiveness, and immunosuppression of PC. Altered metabolism with the TME has emerged as a key mechanism regulating PC progression. This review shed light on the relationship between TME, glucose metabolism, and various aspects of PC. The findings of this study provide a new direction in the development of PC therapy targeting the metabolism of cancer cells.
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Affiliation(s)
- Shi Dong
- The Second School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Wancheng Li
- The Second School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Xin Li
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Zhengfeng Wang
- Department of General Surgery, The First Hospital of Lanzhou University, Lanzhou, China
| | - Zhou Chen
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Huaqing Shi
- The Second School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Ru He
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Chen Chen
- The First School of Clinical Medicine, Lanzhou University, Lanzhou, China
| | - Wence Zhou
- Department of General Surgery, Lanzhou University Second Hospital, Lanzhou, China,*Correspondence: Wence Zhou,
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Lin Y, Wang Y, Li PF. Mutual regulation of lactate dehydrogenase and redox robustness. Front Physiol 2022; 13:1038421. [PMID: 36407005 PMCID: PMC9672381 DOI: 10.3389/fphys.2022.1038421] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Abstract
The nature of redox is electron transfer; in this way, energy metabolism brings redox stress. Lactate production is associated with NAD regeneration, which is now recognized to play a role in maintaining redox homeostasis. The cellular lactate/pyruvate ratio could be described as a proxy for the cytosolic NADH/NAD ratio, meaning lactate metabolism is the key to redox regulation. Here, we review the role of lactate dehydrogenases in cellular redox regulation, which play the role of the direct regulator of lactate–pyruvate transforming. Lactate dehydrogenases (LDHs) are found in almost all animal tissues; while LDHA catalyzed pyruvate to lactate, LDHB catalyzed the reverse reaction . LDH enzyme activity affects cell oxidative stress with NAD/NADH regulation, especially LDHA recently is also thought as an ROS sensor. We focus on the mutual regulation of LDHA and redox robustness. ROS accumulation regulates the transcription of LDHA. Conversely, diverse post-translational modifications of LDHA, such as phosphorylation and ubiquitination, play important roles in enzyme activity on ROS elimination, emphasizing the potential role of the ROS sensor and regulator of LDHA.
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Affiliation(s)
- Yijun Lin
- *Correspondence: Yijun Lin, ; Yan Wang, ; Pei-feng Li,
| | - Yan Wang
- *Correspondence: Yijun Lin, ; Yan Wang, ; Pei-feng Li,
| | - Pei-feng Li
- *Correspondence: Yijun Lin, ; Yan Wang, ; Pei-feng Li,
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10
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Rihan M, Sharma SS. Role of Pyruvate Kinase M2 (PKM2) in Cardiovascular Diseases. J Cardiovasc Transl Res 2022; 16:382-402. [PMID: 36178660 DOI: 10.1007/s12265-022-10321-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 09/07/2022] [Indexed: 11/29/2022]
Abstract
Cardiovascular diseases (CVDs) are the world's leading cause of death, accounting for 32% of all fatalities. Although therapeutic agents are available for CVDs, however, most of them have significant limitations such as the time-dependency effect, hypotension, and bradycardia. To overcome the limitations of current pharmacological therapies, new molecular targets and pathways need to be identified and investigated to provide better treatment options for CVDs. Recent evidence suggested the involvement of pyruvate kinase M2 (PKM2) and targeting PKM2 by its modulators (inhibitors and activators) has shown promising results in several CVDs. PKM2 regulates gene activation in the context of apoptosis, mitosis, hypoxia, inflammation, and metabolic reprogramming. PKM2 modulators might have a significant impact on the molecular pathways involved in CVD pathogenesis. Therefore, PKM2 modulators can be one of the therapeutic options for CVDs. This review provides an insight into PKM2 involvement in various CVDs along with their therapeutic potential.
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Affiliation(s)
- Mohd Rihan
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, Punjab, India
| | - Shyam Sunder Sharma
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar, Punjab, India.
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11
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Ishfaq M, Bashir N, Riaz SK, Manzoor S, Khan JS, Bibi Y, Sami R, Aljahani AH, Alharthy SA, Shahid R. Expression of HK2, PKM2, and PFKM Is Associated with Metastasis and Late Disease Onset in Breast Cancer Patients. Genes (Basel) 2022; 13:549. [PMID: 35328104 PMCID: PMC8955648 DOI: 10.3390/genes13030549] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/09/2022] [Accepted: 03/16/2022] [Indexed: 12/18/2022] Open
Abstract
The reprogramming of energy metabolism is one of the hallmarks of cancer and is crucial for tumor progression. Altered aerobic glycolysis is a well-known characteristic of cancer cell metabolism. In the present study, the expression profiles of key metabolic genes (HK2, PFKM, and PKM2) were assessed in the breast cancer cohort of Pakistan using quantitative polymerase chain reaction (qPCR) and IHC. Expression patterns were correlated with molecular subtypes and clinical parameters in the patients. A significant upregulation of key glycolytic genes was observed in tumor samples in comparison to their adjacent controls (p < 0.0001). The expression of the studied glycolytic genes was significantly increased in late clinical stages, positive nodal involvement, and distant metastasis (p < 0.05). HK2 and PKM2 were found to be upregulated in luminal B, whereas PFKM was overexpressed in the luminal A subtype of breast cancer. The genes were positively correlated with the proliferation marker Ki67 (p < 0.001). Moreover, moderate positive linear correlations between HK2 and PKM2 (r = 0.476), HK2 and PFKM (r = 0.473), and PKM2 and PFKM (r = 0.501) were also observed (p < 0.01). These findings validate that the key regulatory genes in glycolysis can serve as potential biomarkers and/or molecular targets for breast cancer management. However, the clinical significance of these molecules needs to be further validated through in vitro and in vivo experiments.
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Affiliation(s)
- Mehreen Ishfaq
- Department of Biosciences, COMSATS University Islamabad, Islamabad 44000, Pakistan; (M.I.); (N.B.)
| | - Nabiha Bashir
- Department of Biosciences, COMSATS University Islamabad, Islamabad 44000, Pakistan; (M.I.); (N.B.)
| | - Syeda Kiran Riaz
- Department of Molecular Biology, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad 44000, Pakistan;
| | - Shumaila Manzoor
- National Veterinary Lab, National Agricultural Research Centre, Islamabad 44000, Pakistan;
| | - Jahangir Sarwar Khan
- Department of General Surgery, Rawalpindi Medical University, Rawalpindi 46000, Pakistan;
| | - Yamin Bibi
- Department of Botany, PMAS-Arid Agriculture University Rawalpindi, Rawalpindi 46300, Pakistan;
| | - Rokayya Sami
- Department of Food Science and Nutrition, College of Sciences, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Amani H. Aljahani
- Department of Physical Sport Science, College of Education, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia;
| | - Saif A. Alharthy
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, P.O. Box 80216, Jeddah 21589, Saudi Arabia;
- King Fahd Medical Research Center, King Abdulaziz University, P.O. Box 80216, Jeddah 21589, Saudi Arabia
| | - Ramla Shahid
- Department of Biosciences, COMSATS University Islamabad, Islamabad 44000, Pakistan; (M.I.); (N.B.)
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12
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Liu Z, Le Y, Chen H, Zhu J, Lu D. Role of PKM2-Mediated Immunometabolic Reprogramming on Development of Cytokine Storm. Front Immunol 2021; 12:748573. [PMID: 34759927 PMCID: PMC8572858 DOI: 10.3389/fimmu.2021.748573] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 10/11/2021] [Indexed: 12/26/2022] Open
Abstract
The cytokine storm is a marker of severity of various diseases and increased mortality. The altered metabolic profile and energy generation of immune cells affects their activation, exacerbating the cytokine storm. Currently, the emerging field of immunometabolism has highlighted the importance of specific metabolic pathways in immune regulation. The glycolytic enzyme pyruvate kinase M2 (PKM2) is a key regulator of immunometabolism and bridges metabolic and inflammatory dysfunction. This enzyme changes its conformation thus walks in different fields including metabolism and inflammation and associates with various transcription factors. This review summarizes the vital role of PKM2 in mediating immunometabolic reprogramming and its role in inducing cytokine storm, with a focus on providing references for further understanding of its pathological functions and for proposing new targets for the treatment of related diseases.
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Affiliation(s)
- Zhijun Liu
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yifei Le
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Hang Chen
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
| | - Ji Zhu
- The Third Affiliated Hospital of Zhejiang Chinese Medical University (Zhongshan Hospital of Zhejiang Province), Hangzhou, China
| | - Dezhao Lu
- School of Life Science, Zhejiang Chinese Medical University, Hangzhou, China
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13
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Littwitz-Salomon E, Moreira D, Frost JN, Choi C, Liou KT, Ahern DK, O'Shaughnessy S, Wagner B, Biron CA, Drakesmith H, Dittmer U, Finlay DK. Metabolic requirements of NK cells during the acute response against retroviral infection. Nat Commun 2021; 12:5376. [PMID: 34508086 PMCID: PMC8433386 DOI: 10.1038/s41467-021-25715-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 08/21/2021] [Indexed: 02/07/2023] Open
Abstract
Natural killer (NK) cells are important early responders against viral infections. Changes in metabolism are crucial to fuel NK cell responses, and altered metabolism is linked to NK cell dysfunction in obesity and cancer. However, very little is known about the metabolic requirements of NK cells during acute retroviral infection and their importance for antiviral immunity. Here, using the Friend retrovirus mouse model, we show that following infection NK cells increase nutrient uptake, including amino acids and iron, and reprogram their metabolic machinery by increasing glycolysis and mitochondrial metabolism. Specific deletion of the amino acid transporter Slc7a5 has only discrete effects on NK cells, but iron deficiency profoundly impaires NK cell antiviral functions, leading to increased viral loads. Our study thus shows the requirement of nutrients and metabolism for the antiviral activity of NK cells, and has important implications for viral infections associated with altered iron levels such as HIV and SARS-CoV-2. Metabolic alterations control the fate and function of immune cells in response to infections, but the function of NK cell metabolism in the context of acute viral infections is unclear. Here the authors show that acute NK cell responses to Friend retrovirus involve increased glycolysis and mitochondrial metabolism and require amino acid transport as well as iron sufficiency.
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Affiliation(s)
- Elisabeth Littwitz-Salomon
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland.
| | - Diana Moreira
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Joe N Frost
- MRC Human Immunology Unit, MRC Weatherall, Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Chloe Choi
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Kevin T Liou
- Department of Molecular Microbiology and Immunology, Brown University, Box G-B, 171 Meeting Street, Providence, RI, 02912, USA
| | - David K Ahern
- MRC Human Immunology Unit, MRC Weatherall, Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Simon O'Shaughnessy
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland
| | - Bernd Wagner
- Department of Clinical Chemistry, University Hospital Essen, Essen, Germany
| | - Christine A Biron
- Department of Molecular Microbiology and Immunology, Brown University, Box G-B, 171 Meeting Street, Providence, RI, 02912, USA
| | - Hal Drakesmith
- MRC Human Immunology Unit, MRC Weatherall, Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - Ulf Dittmer
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - David K Finlay
- School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland. .,School of Pharmacy and Pharmaceutical Sciences, Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin, 2, Ireland.
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14
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Lv X, Zhou H, Hu K, Lin L, Yang Y, Li L, Tang L, Huang J, Shen Y, Jiang R, Wan J, Zhang L. Activation of PKM2 metabolically controls fulminant liver injury via restoration of pyruvate and reactivation of CDK1. Pharmacol Res 2021; 172:105838. [PMID: 34425230 DOI: 10.1016/j.phrs.2021.105838] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Revised: 08/14/2021] [Accepted: 08/16/2021] [Indexed: 12/12/2022]
Abstract
Accumulating evidence indicates that metabolic events profoundly modulate the progression of various diseases. Pyruvate is a central metabolic intermediate in glucose metabolism. In the present study, the metabolic status of pyruvate and its pharmacological significance has been investigated in mice with lipopolysaccharide/D-galactosamine (LPS/D-Gal)-induced fulminant liver injury. Our results indicated that LPS/D-Gal exposure decreased the activity of pyruvate kinase and the content of pyruvate, which were reversed by the PKM2 activator TEPP-46. Pretreatment with TEPP-46 or supplementation with the cell-permeable pyruvate derivate ethyl pyruvate (EP) attenuated LPS/D-Gal-induced liver damage. Interestingly, post-insult intervention of pyruvate metabolism also resulted in beneficial outcomes. The phospho-antibody microarray analysis and immunoblot analysis found that the inhibitory phosphorylation of cyclin dependent kinase 1 (CDK1) was reversed by TEPP-46, DASA-58 or EP. In addition, the therapeutic benefits of PKM2 activator or EP were blunted by the CDK1 inhibitor Ro 3306. Our data suggests that LPS/D-Gal exposure-induced decline of pyruvate might be a novel metabolic mechanism underlies the development of LPS/D-Gal-induced fulminant liver injury, PKM2 activator or pyruvate derivate might have potential value for the pharmacological intervention of fulminant liver injury.
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Affiliation(s)
- Xiaohui Lv
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China; Laboratory of Stem cell and Tissue Engineering, Chongqing Medical University, Chongqing, China
| | - Honghong Zhou
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Kai Hu
- Laboratory of Stem cell and Tissue Engineering, Chongqing Medical University, Chongqing, China; Department of Histology and Embryology, Chongqing Medical University, Chongqing, China
| | - Ling Lin
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Yongqiang Yang
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Longjiang Li
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Li Tang
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Jiayi Huang
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Yi Shen
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China
| | - Rong Jiang
- Laboratory of Stem cell and Tissue Engineering, Chongqing Medical University, Chongqing, China
| | - Jingyuan Wan
- Department of Pharmacology, Chongqing Medical University, Chongqing, China.
| | - Li Zhang
- Department of Pathophysiology, Chongqing Medical University, Chongqing, China; Laboratory of Stem cell and Tissue Engineering, Chongqing Medical University, Chongqing, China.
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15
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Lee YB, Min JK, Kim JG, Cap KC, Islam R, Hossain AJ, Dogsom O, Hamza A, Mahmud S, Choi DR, Kim YS, Koh YH, Kim HA, Chung WS, Suh SW, Park JB. Multiple functions of pyruvate kinase M2 in various cell types. J Cell Physiol 2021; 237:128-148. [PMID: 34311499 DOI: 10.1002/jcp.30536] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/28/2021] [Accepted: 07/13/2021] [Indexed: 02/06/2023]
Abstract
Glucose metabolism is a mechanism by which energy is produced in form of adenosine triphosphate (ATP) by mitochondria and precursor metabolites are supplied to enable the ultimate enrichment of mature metabolites in the cell. Recently, glycolytic enzymes have been shown to have unconventional but important functions. Among these enzymes, pyruvate kinase M2 (PKM2) plays several roles including having conventional metabolic enzyme activity, and also being a transcriptional regulator and a protein kinase. Compared with the closely related PKM1, PKM2 is highly expressed in cancer cells and embryos, whereas PKM1 is dominant in mature, differentiated cells. Posttranslational modifications such as phosphorylation and acetylation of PKM2 change its cellular functions. In particular, PKM2 can translocate to the nucleus, where it regulates the transcription of many target genes. It is notable that PKM2 also acts as a protein kinase to phosphorylate several substrate proteins. Besides cancer cells and embryonic cells, astrocytes also highly express PKM2, which is crucial for lactate production via expression of lactate dehydrogenase A (LDHA), while mature neurons predominantly express PKM1. The lactate produced in cancer cells promotes tumor progress and that in astrocytes can be supplied to neurons and may act as a major source for neuronal ATP energy production. Thereby, we propose that PKM2 along with its different posttranslational modifications has specific purposes for a variety of cell types, performing unique functions.
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Affiliation(s)
- Yoon-Beom Lee
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea
| | - Jung K Min
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea
| | - Jae-Gyu Kim
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea.,Institute of Cell Differentiation and Aging, College of Medicine, Hallym University, Chuncheon, Republic of Korea
| | - Kim Cuong Cap
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea.,eLmed Inc. #3419, Hallym University, Chuncheon, Kangwon-do, Republic of Korea.,Institute of Research and Development, Duy Tan University, Danang, Vietnam
| | - Rokibul Islam
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea.,Department of Biotechnology and Genetic Engineering, Faculty of Biological Science, Islamic University, Kushtia, Bangladesh
| | - Abu J Hossain
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea
| | - Oyungerel Dogsom
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea.,Department of Biology, School of Bio-Medicine, Mongolian National University of Medical Sciences, Ulaanbaatar, Mongolia
| | - Amir Hamza
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea
| | - Shohel Mahmud
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea.,National Institute of Biotechnology, Ganakbari, Savar, Dhaka, Bangladesh
| | - Dae R Choi
- Department of Internal Medicine, Chuncheon Sacred Heart Hospital, College of Medicine, Hallym University, Chuncheon, Republic of Korea
| | - Yong-Sun Kim
- Ilsong Institute of Life Science, Hallym University, Seoul, Republic of Korea
| | - Young-Ho Koh
- Ilsong Institute of Life Science, Hallym University, Seoul, Republic of Korea
| | - Hyun-A Kim
- Department of Internal Medicine, Hallym Sacred Heart Hospital, College of Medicine, Hallym University, Ahnyang, Republic of Korea
| | - Won-Suk Chung
- Department of Biological Science, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Sang W Suh
- Department of Physiology, College of Medicine, Hallym University, Chuncheon, Republic of Korea
| | - Jae-Bong Park
- Department of Biochemistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea.,Institute of Cell Differentiation and Aging, College of Medicine, Hallym University, Chuncheon, Republic of Korea.,eLmed Inc. #3419, Hallym University, Chuncheon, Kangwon-do, Republic of Korea
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16
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Manuel AM, van de Wetering C, MacPherson M, Erickson C, Murray C, Aboushousha R, van der Velden J, Dixon AE, Poynter ME, Irvin CG, Taatjes DJ, van der Vliet A, Anathy V, Janssen-Heininger YMW. Dysregulation of Pyruvate Kinase M2 Promotes Inflammation in a Mouse Model of Obese Allergic Asthma. Am J Respir Cell Mol Biol 2021; 64:709-721. [PMID: 33662229 PMCID: PMC8456891 DOI: 10.1165/rcmb.2020-0512oc] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 02/07/2021] [Indexed: 01/17/2023] Open
Abstract
Obesity is a risk factor for the development of asthma and represents a difficult-to-treat disease phenotype. Aerobic glycolysis is emerging as a key feature of asthma, and changes in glucose metabolism are linked to leukocyte activation and adaptation to oxidative stress. Dysregulation of PKM2 (pyruvate kinase M2), the enzyme that catalyzes the last step of glycolysis, contributes to house dust mite (HDM)-induced airway inflammation and remodeling in lean mice. It remains unclear whether glycolytic reprogramming and dysregulation of PKM2 also contribute to obese asthma. The goal of the present study was to elucidate the functional role of PKM2 in a murine model of obese allergic asthma. We evaluated the small molecule activator of PKM2, TEPP46, and assessed the role of PKM2 using conditional ablation of the Pkm2 allele from airway epithelial cells. In obese C57BL/6NJ mice, parameters indicative of glycolytic reprogramming remained unchanged in the absence of stimulation with HDM. Obese mice that were subjected to HDM showed evidence of glycolytic reprogramming, and treatment with TEPP46 diminished airway inflammation, whereas parameters of airway remodeling were unaffected. Epithelial ablation of Pkm2 decreased central airway resistance in both lean and obese allergic mice in addition to decreasing inflammatory cytokines in the lung tissue. Lastly, we highlight a novel role for PKM2 in the regulation of glutathione-dependent protein oxidation in the lung tissue of obese allergic mice via a putative IFN-γ-glutaredoxin1 pathway. Overall, targeting metabolism and protein oxidation may be a novel treatment strategy for obese allergic asthma.
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Affiliation(s)
| | | | | | - Cuixia Erickson
- Department of Pathology and Department of Laboratory Medicine, and
| | - Caliann Murray
- Department of Pathology and Department of Laboratory Medicine, and
| | - Reem Aboushousha
- Department of Pathology and Department of Laboratory Medicine, and
| | | | - Anne E. Dixon
- Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Matthew E. Poynter
- Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | - Charles G. Irvin
- Department of Medicine, Larner College of Medicine, University of Vermont, Burlington, Vermont
| | | | | | - Vikas Anathy
- Department of Pathology and Department of Laboratory Medicine, and
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17
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Abstract
Targeting glycolysis in T helper 17 (Th17) cells presents an attractive
opportunity to treat Th17 cell-mediated autoimmune diseases such as multiple
sclerosis (MS). Pyruvate kinase isoform 2 (PKM2) is a glycolytic enzyme
expressed in T cells infiltrating the central nervous system in a mouse model of
MS, suggesting PKM2 modulation could provide a new avenue for MS therapeutics.
In a recent article in Science Signaling, Seki et al. show that
pharmacological modulation of PKM2 alters but does not ameliorate disease in a
mouse model of MS. These results warrant further consideration of PKM2
modulators to treat Th17 cell-mediated autoimmunity.
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18
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Puckett DL, Alquraishi M, Chowanadisai W, Bettaieb A. The Role of PKM2 in Metabolic Reprogramming: Insights into the Regulatory Roles of Non-Coding RNAs. Int J Mol Sci 2021; 22:1171. [PMID: 33503959 PMCID: PMC7865720 DOI: 10.3390/ijms22031171] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 01/17/2023] Open
Abstract
Pyruvate kinase is a key regulator in glycolysis through the conversion of phosphoenolpyruvate (PEP) into pyruvate. Pyruvate kinase exists in various isoforms that can exhibit diverse biological functions and outcomes. The pyruvate kinase isoenzyme type M2 (PKM2) controls cell progression and survival through the regulation of key signaling pathways. In cancer cells, the dimer form of PKM2 predominates and plays an integral role in cancer metabolism. This predominance of the inactive dimeric form promotes the accumulation of phosphometabolites, allowing cancer cells to engage in high levels of synthetic processing to enhance their proliferative capacity. PKM2 has been recognized for its role in regulating gene expression and transcription factors critical for health and disease. This role enables PKM2 to exert profound regulatory effects that promote cancer cell metabolism, proliferation, and migration. In addition to its role in cancer, PKM2 regulates aspects essential to cellular homeostasis in non-cancer tissues and, in some cases, promotes tissue-specific pathways in health and diseases. In pursuit of understanding the diverse tissue-specific roles of PKM2, investigations targeting tissues such as the kidney, liver, adipose, and pancreas have been conducted. Findings from these studies enhance our understanding of PKM2 functions in various diseases beyond cancer. Therefore, there is substantial interest in PKM2 modulation as a potential therapeutic target for the treatment of multiple conditions. Indeed, a vast plethora of research has focused on identifying therapeutic strategies for targeting PKM2. Recently, targeting PKM2 through its regulatory microRNAs, long non-coding RNAs (lncRNAs), and circular RNAs (circRNAs) has gathered increasing interest. Thus, the goal of this review is to highlight recent advancements in PKM2 research, with a focus on PKM2 regulatory microRNAs and lncRNAs and their subsequent physiological significance.
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Affiliation(s)
- Dexter L. Puckett
- Department of Nutrition, University of Tennessee Knoxville, Knoxville, TN 37996, USA; (D.L.P.); (M.A.)
| | - Mohammed Alquraishi
- Department of Nutrition, University of Tennessee Knoxville, Knoxville, TN 37996, USA; (D.L.P.); (M.A.)
| | - Winyoo Chowanadisai
- Department of Nutrition, Oklahoma State University, Stillwater, OK 74078, USA;
| | - Ahmed Bettaieb
- Department of Nutrition, University of Tennessee Knoxville, Knoxville, TN 37996, USA; (D.L.P.); (M.A.)
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19
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The Role of Metabolic Enzymes in the Regulation of Inflammation. Metabolites 2020; 10:metabo10110426. [PMID: 33114536 PMCID: PMC7693344 DOI: 10.3390/metabo10110426] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/19/2020] [Accepted: 10/19/2020] [Indexed: 12/26/2022] Open
Abstract
Immune cells undergo dramatic metabolic reprogramming in response to external stimuli. These metabolic pathways, long considered as simple housekeeping functions, are increasingly understood to critically regulate the immune response, determining the activation, differentiation, and downstream effector functions of both lymphoid and myeloid cells. Within the complex metabolic networks associated with immune activation, several enzymes play key roles in regulating inflammation and represent potential therapeutic targets in human disease. In some cases, these enzymes control flux through pathways required to meet specific energetic or metabolic demands of the immune response. In other cases, key enzymes control the concentrations of immunoactive metabolites with direct roles in signaling. Finally, and perhaps most interestingly, several metabolic enzymes have evolved moonlighting functions, with roles in the immune response that are entirely independent of their conventional enzyme activities. Here, we review key metabolic enzymes that critically regulate inflammation, highlighting mechanistic insights and opportunities for clinical intervention.
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