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Miura T, Kouzu H, Tanno M, Tatekoshi Y, Kuno A. Role of AMP deaminase in diabetic cardiomyopathy. Mol Cell Biochem 2024:10.1007/s11010-024-04951-z. [PMID: 38386218 DOI: 10.1007/s11010-024-04951-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 01/24/2024] [Indexed: 02/23/2024]
Abstract
Diabetes mellitus is one of the major causes of ischemic and nonischemic heart failure. While hypertension and coronary artery disease are frequent comorbidities in patients with diabetes, cardiac contractile dysfunction and remodeling occur in diabetic patients even without comorbidities, which is referred to as diabetic cardiomyopathy. Investigations in recent decades have demonstrated that the production of reactive oxygen species (ROS), impaired handling of intracellular Ca2+, and alterations in energy metabolism are involved in the development of diabetic cardiomyopathy. AMP deaminase (AMPD) directly regulates adenine nucleotide metabolism and energy transfer by adenylate kinase and indirectly modulates xanthine oxidoreductase-mediated pathways and AMP-activated protein kinase-mediated signaling. Upregulation of AMPD in diabetic hearts was first reported more than 30 years ago, and subsequent studies showed similar upregulation in the liver and skeletal muscle. Evidence for the roles of AMPD in diabetes-induced fatty liver, sarcopenia, and heart failure has been accumulating. A series of our recent studies showed that AMPD localizes in the mitochondria-associated endoplasmic reticulum membrane as well as the sarcoplasmic reticulum and cytosol and participates in the regulation of mitochondrial Ca2+ and suggested that upregulated AMPD contributes to contractile dysfunction in diabetic cardiomyopathy via increased generation of ROS, adenine nucleotide depletion, and impaired mitochondrial respiration. The detrimental effects of AMPD were manifested at times of increased cardiac workload by pressure loading. In this review, we briefly summarize the expression and functions of AMPD in the heart and discuss the roles of AMPD in diabetic cardiomyopathy, mainly focusing on contractile dysfunction caused by this disorder.
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Affiliation(s)
- Tetsuji Miura
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
- Department of Clinical Pharmacology, Faculty of Pharmaceutical Sciences, Hokkaido University of Science, 15-4-1, Maeda-7, Teine-Ku, Sapporo, 006-8585, Japan.
| | - Hidemichi Kouzu
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Masaya Tanno
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
- Department of Nursing, Sapporo Medical University School of Health Sciences, Sapporo, Japan
| | - Yuki Tatekoshi
- Department of Pharmacology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Atsushi Kuno
- Department of Pharmacology, Sapporo Medical University School of Medicine, Sapporo, Japan
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Camici M, Garcia-Gil M, Allegrini S, Pesi R, Bernardini G, Micheli V, Tozzi MG. Inborn Errors of Purine Salvage and Catabolism. Metabolites 2023; 13:787. [PMID: 37512494 PMCID: PMC10383617 DOI: 10.3390/metabo13070787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/20/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
Cellular purine nucleotides derive mainly from de novo synthesis or nucleic acid turnover and, only marginally, from dietary intake. They are subjected to catabolism, eventually forming uric acid in humans, while bases and nucleosides may be converted back to nucleotides through the salvage pathways. Inborn errors of the purine salvage pathway and catabolism have been described by several researchers and are usually referred to as rare diseases. Since purine compounds play a fundamental role, it is not surprising that their dysmetabolism is accompanied by devastating symptoms. Nevertheless, some of these manifestations are unexpected and, so far, have no explanation or therapy. Herein, we describe several known inborn errors of purine metabolism, highlighting their unexplained pathological aspects. Our intent is to offer new points of view on this topic and suggest diagnostic tools that may possibly indicate to clinicians that the inborn errors of purine metabolism may not be very rare diseases after all.
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Affiliation(s)
- Marcella Camici
- Unità di Biochimica, Dipartimento di Biologia, Università di Pisa, Via San Zeno 51, 56127 Pisa, Italy
| | - Mercedes Garcia-Gil
- Unità di Fisiologia Generale, Dipartimento di Biologia, Università di Pisa, Via San Zeno 31, 56127 Pisa, Italy
- CISUP, Centro per l'Integrazione Della Strumentazione Dell'Università di Pisa, 56127 Pisa, Italy
- Centro di Ricerca Interdipartimentale Nutrafood "Nutraceuticals and Food for Health", Università di Pisa, 56126 Pisa, Italy
| | - Simone Allegrini
- Unità di Biochimica, Dipartimento di Biologia, Università di Pisa, Via San Zeno 51, 56127 Pisa, Italy
- CISUP, Centro per l'Integrazione Della Strumentazione Dell'Università di Pisa, 56127 Pisa, Italy
- Centro di Ricerca Interdipartimentale Nutrafood "Nutraceuticals and Food for Health", Università di Pisa, 56126 Pisa, Italy
| | - Rossana Pesi
- Unità di Biochimica, Dipartimento di Biologia, Università di Pisa, Via San Zeno 51, 56127 Pisa, Italy
| | - Giulia Bernardini
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
| | - Vanna Micheli
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università di Siena, Via A. Moro 2, 53100 Siena, Italy
- LND Famiglie Italiane ODV-Via Giovanetti 15-20, 16149 Genova, Italy
| | - Maria Grazia Tozzi
- Unità di Biochimica, Dipartimento di Biologia, Università di Pisa, Via San Zeno 51, 56127 Pisa, Italy
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Zabielska-Kaczorowska MA, Braczko A, Pelikant-Malecka I, Slominska EM, Smolenski RT. Hidden Pool of Cardiac Adenine Nucleotides That Controls Adenosine Production. Pharmaceuticals (Basel) 2023; 16:ph16040599. [PMID: 37111356 PMCID: PMC10142527 DOI: 10.3390/ph16040599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 04/11/2023] [Accepted: 04/14/2023] [Indexed: 04/29/2023] Open
Abstract
Myocardial ischemic adenosine production decreases in subsequent events that may blunt its protective functions. To test the relation between total or mitochondrial cardiac adenine nucleotide pool (TAN) on the energy status with adenosine production, Langendorff perfused rat hearts were subjected to three protocols: 1 min ischemia at 40 min, 10 min ischemia at 50 min, and 1 min ischemia at 85 min in Group I; additional infusion of adenosine (30 µM) for 15 min after 10 min ischemia in Group I-Ado, and 1 min ischemia at 40 and 85 min in the controls (Group No I). A 31P NMR and an HPLC were used for the analysis of nucleotide and catabolite concentrations in the heart and coronary effluent. Cardiac adenosine production in Group I measured after 1 min ischemia at 85 min decreased to less than 15% of that at 40 min in Group I, accompanied by a decrease in cardiac ATP and TAN to 65% of the initial results. Adenosine production at 85 min was restored to 45% of that at 40 min in Group I-Ado, accompanied by a rebound of ATP and TAN by 10% vs. Group I. Mitochondrial TAN and free AMP concentrations paralleled that of total cardiac TAN. Changes in energy equilibrium or mitochondrial function were minor. This study highlights that only a fraction of the cardiac adenine nucleotide pool is available for adenosine production, but further studies are necessary to clarify its nature.
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Affiliation(s)
- Magdalena A Zabielska-Kaczorowska
- Department of Physiology, Medical University of Gdansk, 80-210 Gdansk, Poland
- Department of Biochemistry, Medical University of Gdansk, 80-210 Gdansk, Poland
| | - Alicja Braczko
- Department of Biochemistry, Medical University of Gdansk, 80-210 Gdansk, Poland
| | - Iwona Pelikant-Malecka
- Division of Medical Laboratory Diagnostics, Medical University of Gdansk, 80-210 Gdansk, Poland
| | - Ewa M Slominska
- Department of Biochemistry, Medical University of Gdansk, 80-210 Gdansk, Poland
| | - Ryszard T Smolenski
- Department of Biochemistry, Medical University of Gdansk, 80-210 Gdansk, Poland
- Heart Science Centre, Imperial College at Harefield Hospital, Harefield UB9 6JH, UK
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4
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AMPK inhibits liver gluconeogenesis: fact or fiction? Biochem J 2023; 480:105-125. [PMID: 36637190 DOI: 10.1042/bcj20220582] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/21/2022] [Accepted: 01/04/2023] [Indexed: 01/14/2023]
Abstract
Is there a role for AMPK in the control of hepatic gluconeogenesis and could targeting AMPK in liver be a viable strategy for treating type 2 diabetes? These are frequently asked questions this review tries to answer. After describing properties of AMPK and different small-molecule AMPK activators, we briefly review the various mechanisms for controlling hepatic glucose production, mainly via gluconeogenesis. The different experimental and genetic models that have been used to draw conclusions about the role of AMPK in the control of liver gluconeogenesis are critically discussed. The effects of several anti-diabetic drugs, particularly metformin, on hepatic gluconeogenesis are also considered. We conclude that the main effect of AMPK activation pertinent to the control of hepatic gluconeogenesis is to antagonize glucagon signalling in the short-term and, in the long-term, to improve insulin sensitivity by reducing hepatic lipid content.
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Hafen PS, Law AS, Matias C, Miller SG, Brault JJ. Skeletal muscle contraction kinetics and AMPK responses are modulated by the adenine nucleotide degrading enzyme AMPD1. J Appl Physiol (1985) 2022; 133:1055-1066. [PMID: 36107988 PMCID: PMC9602816 DOI: 10.1152/japplphysiol.00035.2022] [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: 01/20/2022] [Revised: 08/15/2022] [Accepted: 09/09/2022] [Indexed: 12/31/2022] Open
Abstract
AMP deaminase 1 (AMPD1; AMP → IMP + NH3) deficiency in skeletal muscle results in an inordinate accumulation of AMP during strenuous exercise, with some but not all studies reporting premature fatigue and reduced work capacity. To further explore these inconsistencies, we investigated the extent to which AMPD1 deficiency impacts skeletal muscle contractile function of different muscles and the [AMP]/AMPK responses to different intensities of fatiguing contractions. To reduce AMPD1 protein, we electroporated either an inhibitory AMPD1-specific miRNA encoding plasmid or a control plasmid, into contralateral EDL and SOL muscles of C57BL/6J mice (n = 48 males, 24 females). After 10 days, isolated muscles were assessed for isometric twitch, tetanic, and repeated fatiguing contraction characteristics using one of four (None, LOW, MOD, and HIGH) duty cycles. AMPD1 knockdown (∼35%) had no effect on twitch force or twitch contraction/relaxation kinetics. However, during maximal tetanic contractions, AMPD1 knockdown impaired both time-to-peak tension (TPT) and half-relaxation time (½ RT) in EDL, but not SOL muscle. In addition, AMPD1 knockdown in EDL exaggerated the AMP response to contractions at LOW (+100%) and MOD (+54%) duty cycles, but not at HIGH duty cycle. This accumulation of AMP was accompanied by increased AMPK phosphorylation (Thr-172; LOW +25%, MOD +34%) and downstream substrate phosphorylation (LOW +15%, MOD +17%). These responses to AMPD1 knockdown were not different between males and females. Our findings demonstrate that AMPD1 plays a role in maintaining skeletal muscle contractile function and regulating the energetic responses associated with repeated contractions in a muscle- but not sex-specific manner.NEW & NOTEWORTHY AMP deaminase 1 (AMPD1) deficiency has been associated with premature muscle fatigue and reduced work capacity, but this finding has been inconsistent. Herein, we report that although AMPD1 knockdown in mouse skeletal muscle does not change maximal isometric force, it negatively impacts muscle function by slowing contraction and relaxation kinetics in EDL muscle but not SOL muscle. Furthermore, AMPD1 knockdown differentially affects the [AMP]/AMPK responses to fatiguing contractions in an intensity-dependent manner in EDL muscle.
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Affiliation(s)
- Paul S Hafen
- Department of Anatomy, Cell Biology & Physiology, Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, Indiana
| | - Andrew S Law
- Department of Anatomy, Cell Biology & Physiology, Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, Indiana
| | - Catalina Matias
- Department of Anatomy, Cell Biology & Physiology, Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, Indiana
| | - Spencer G Miller
- Department of Anatomy, Cell Biology & Physiology, Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, Indiana
- Department of Kinesiology, East Carolina University, Greenville, North Carolina
| | - Jeffrey J Brault
- Department of Anatomy, Cell Biology & Physiology, Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, Indiana
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Lu Q, Houbaert A, Ma Q, Huang J, Sterck L, Zhang C, Benjamins R, Coppens F, Van Breusegem F, Russinova E. Adenosine monophosphate deaminase modulates BIN2 activity through hydrogen peroxide-induced oligomerization. THE PLANT CELL 2022; 34:3844-3859. [PMID: 35876813 PMCID: PMC9520590 DOI: 10.1093/plcell/koac203] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 06/17/2022] [Indexed: 05/06/2023]
Abstract
The Arabidopsis thaliana GSK3-like kinase, BRASSINOSTEROID-INSENSITIVE2 (BIN2) is a key negative regulator of brassinosteroid (BR) signaling and a hub for crosstalk with other signaling pathways. However, the mechanisms controlling BIN2 activity are not well understood. Here we performed a forward genetic screen for resistance to the plant-specific GSK3 inhibitor bikinin and discovered that a mutation in the ADENOSINE MONOPHOSPHATE DEAMINASE (AMPD)/EMBRYONIC FACTOR1 (FAC1) gene reduces the sensitivity of Arabidopsis seedlings to both bikinin and BRs. Further analyses revealed that AMPD modulates BIN2 activity by regulating its oligomerization in a hydrogen peroxide (H2O2)-dependent manner. Exogenous H2O2 induced the formation of BIN2 oligomers with a decreased kinase activity and an increased sensitivity to bikinin. By contrast, AMPD activity inhibition reduced the cytosolic reactive oxygen species (ROS) levels and the amount of BIN2 oligomers, correlating with the decreased sensitivity of Arabidopsis plants to bikinin and BRs. Furthermore, we showed that BIN2 phosphorylates AMPD to possibly alter its function. Our results uncover the existence of an H2O2 homeostasis-mediated regulation loop between AMPD and BIN2 that fine-tunes the BIN2 kinase activity to control plant growth and development.
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Affiliation(s)
- Qing Lu
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | | | - Qian Ma
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - Jingjing Huang
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - Lieven Sterck
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - Cheng Zhang
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - René Benjamins
- Plant Developmental Biology, Wageningen University Research, 6708 PB Wageningen, The Netherlands
| | - Frederik Coppens
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
| | - Frank Van Breusegem
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Ghent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Ghent, Belgium
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Zhou Y, Zuo A, Li Y, Zhang Y, Yi Z, Zhao D, Tang J, Qu F, Cao S, Mao Z, Jin J, Liu Z. Molecular characterization of adenosine monophosphate deaminase 1 and its regulatory mechanism for inosine monophosphate formation in triploid crucian carp. Front Physiol 2022; 13:970939. [PMID: 36111156 PMCID: PMC9468423 DOI: 10.3389/fphys.2022.970939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/03/2022] [Indexed: 11/13/2022] Open
Abstract
Inosine monophosphate (IMP) is the main flavoring substance in aquatic animal, and adenosine monophosphate deaminase1 (AMPD1) gene is a key gene in IMP formation. At present, the research on the mechanism of AMPD1 regulating IMP formation in aquatic animal is still blank. In this study, in order to study the mechanism of AMPD1 regulating IMP formation in fish, the full open reading frame (ORF) of AMPD1 which was 2160bp was obtained for the first time in triploid crucian carp (Carassius auratus). It encoded 719 amino acids with a molecular mass of 82.97 kDa, and the theoretical isoelectric point value was 6.31. The homology analysis showed that the homology of triploid crucian carp and diploid Carassius auratus was the highest, up to 99%. And the phylogenetic tree showed that triploid crucian carp was grouped with diploid Carassius auratus, Culter alburnus, and Danio rerio. And real-time fluorescence quantitative results showed that AMPD1 was expressed specifically in muscle of triploid crucian carp (p < 0.05). The results of detection the localization of AMPD1 in cells indicated that the AMPD1 was mainly localized in cytoplasm and cell membrane. Further, we examined the effects of glutamate which was the promotor of IMP formation on the expression of AMPD1 and the formation of IMP in vivo and in vitro experiments, the results showed that 3% glutamate and 2 mg/ml glutamate could significantly promote AMPD1 expression and IMP formation in triploid crucian carp muscle tissue and muscle cells (p < 0.05). Then we inhibited the expression of AMPD1 in vivo and in vitro experiments, we found the formation of IMP in muscle tissue and muscle cells of triploid crucian carp all were inhibited and they affected the gene expression of AMPK-mTOR signaling pathway. The all results showed that AMPD1 mediated glutamate through AMPK-mTOR signaling pathway to regulate the formation of fish IMP.
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Affiliation(s)
- Yonghua Zhou
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Anli Zuo
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Yingjie Li
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Yu Zhang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Zilin Yi
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Dafang Zhao
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Jianzhou Tang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Fufa Qu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Shenping Cao
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Zhuangwen Mao
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
| | - Junyan Jin
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
| | - Zhen Liu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, China
- *Correspondence: Zhen Liu,
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Metformin and Insulin Resistance: A Review of the Underlying Mechanisms behind Changes in GLUT4-Mediated Glucose Transport. Int J Mol Sci 2022; 23:ijms23031264. [PMID: 35163187 PMCID: PMC8836112 DOI: 10.3390/ijms23031264] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/21/2022] [Accepted: 01/21/2022] [Indexed: 02/06/2023] Open
Abstract
Metformin is the most commonly used treatment to increase insulin sensitivity in insulin-resistant (IR) conditions such as diabetes, prediabetes, polycystic ovary syndrome, and obesity. There is a well-documented correlation between glucose transporter 4 (GLUT4) expression and the level of IR. Therefore, the observed increase in peripheral glucose utilization after metformin treatment most likely comes from the induction of GLUT4 expression and its increased translocation to the plasma membrane. However, the mechanisms behind this effect and the critical metformin targets are still largely undefined. The present review explores the evidence for the crucial role of changes in the expression and activation of insulin signaling pathway mediators, AMPK, several GLUT4 translocation mediators, and the effect of posttranscriptional modifications based on previously published preclinical and clinical models of metformin’s mode of action in animal and human studies. Our aim is to provide a comprehensive review of the studies in this field in order to shed some light on the complex interactions between metformin action, GLUT4 expression, GLUT4 translocation, and the observed increase in peripheral insulin sensitivity.
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Tomczyk M, Glaser T, Slominska EM, Ulrich H, Smolenski RT. Purine Nucleotides Metabolism and Signaling in Huntington's Disease: Search for a Target for Novel Therapies. Int J Mol Sci 2021; 22:ijms22126545. [PMID: 34207177 PMCID: PMC8234552 DOI: 10.3390/ijms22126545] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/13/2021] [Accepted: 06/14/2021] [Indexed: 12/18/2022] Open
Abstract
Huntington’s disease (HD) is a multi-system disorder that is caused by expanded CAG repeats within the exon-1 of the huntingtin (HTT) gene that translate to the polyglutamine stretch in the HTT protein. HTT interacts with the proteins involved in gene transcription, endocytosis, and metabolism. HTT may also directly or indirectly affect purine metabolism and signaling. We aimed to review existing data and discuss the modulation of the purinergic system as a new therapeutic target in HD. Impaired intracellular nucleotide metabolism in the HD affected system (CNS, skeletal muscle and heart) may lead to extracellular accumulation of purine metabolites, its unusual catabolism, and modulation of purinergic signaling. The mechanisms of observed changes might be different in affected systems. Based on collected findings, compounds leading to purine and ATP pool reconstruction as well as purinergic receptor activity modulators, i.e., P2X7 receptor antagonists, may be applied for HD treatment.
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Affiliation(s)
- Marta Tomczyk
- Department of Biochemistry, Medical University of Gdansk, 80-210 Gdansk, Poland;
- Correspondence: (M.T.); (R.T.S.)
| | - Talita Glaser
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo 05508-000, Brazil; (T.G.); (H.U.)
| | - Ewa M. Slominska
- Department of Biochemistry, Medical University of Gdansk, 80-210 Gdansk, Poland;
| | - Henning Ulrich
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo 05508-000, Brazil; (T.G.); (H.U.)
| | - Ryszard T. Smolenski
- Department of Biochemistry, Medical University of Gdansk, 80-210 Gdansk, Poland;
- Correspondence: (M.T.); (R.T.S.)
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Chang YB, Hong KB, Kim MG, Suh HJ, Jo K. Effect of the protein hydrolysate of rice syrup meal on the endurance exercise performance of BALB/c mice. Food Funct 2021; 12:1338-1348. [PMID: 33448266 DOI: 10.1039/d0fo02667k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Rice is a staple food in Korea. The protein in rice reportedly contains higher levels of branched-chain amino acids (BCAAs) than proteins in other grains. Taking BCAAs during exercise can reduce muscle fatigue by reducing muscle glycogen depletion. However, there are limited studies reporting the anti-fatigue effect of rice protein. We investigate the muscular endurance and anti-fatigue effects of the protein hydrolysate of rice syrup meal in mouse models. BALB/C mice were divided into the following groups: control (CON), low and high dose rice syrup meal (RL: 1.5 g kg-1; RH: 3.0 g kg-1), and low and high dose protein hydrolysate of rice syrup meal (PL: 1.5 g kg-1; PH: 3.0 g kg-1). The total activity during a forced swimming test was analyzed by a behavioral assay. The mutual relationship between the anti-fatigue activity and energy metabolism was assessed by biochemical, enzyme activity, and gene expression analyses. The protein hydrolysate of rice syrup meal contained 32.18 mg g-1 BCAAs, such as leucine, isoleucine, and valine, and its BCAA ratio (2.5 : 1.0 : 1.4) was considered effective for endurance exercise. Furthermore, PH administration significantly increased the change in the maximum swimming duration by 4.2 min (3.77 ± 0.74 min) compared to that of the CON group (-0.42 ± 0.55 min, p < 0.01). The PH group showed significantly different changes in the blood glucose and lactate levels compared with the CON group; similarly, the aspartate amino transferase and alanine amino transferase levels were significantly lower in the protein hydrolysate of rice syrup meal group than the CON group (p < 0.001 and p < 0.01, respectively). The protein hydrolysate of rice syrup meal-mediated improvement of endurance performance was accompanied by an increased in adenosine triphosphate content in the muscle and decreased reactive oxygen species accumulation in the liver. In addition, mRNA and protein levels of phospho-AMP activated protein kinase (p-AMPK)/AMPK and peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC1-α), the major energy-related factors of protein hydrolysate of rice syrup meal, were significantly increased. The protein hydrolysate of rice syrup meal can be utilized as an efficacious natural resource for its muscular-endurance-enhancing and anti-fatigue effects.
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Affiliation(s)
- Yeok Boo Chang
- Department of Integrated Biomedical and Life Science, Graduate School, Korea University, Seoul 02841, Republic of Korea.
| | - Ki-Bae Hong
- Department of Integrated Biomedical and Life Science, Graduate School, Korea University, Seoul 02841, Republic of Korea.
| | - Min Guk Kim
- Department of Integrated Biomedical and Life Science, Graduate School, Korea University, Seoul 02841, Republic of Korea.
| | - Hyung Joo Suh
- Department of Integrated Biomedical and Life Science, Graduate School, Korea University, Seoul 02841, Republic of Korea.
| | - Kyungae Jo
- Department of Integrated Biomedical and Life Science, Graduate School, Korea University, Seoul 02841, Republic of Korea.
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11
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Abnous K, Storey KB. 5'-Adenosine monophosphate deaminase regulation in ground squirrels during hibernation. Comp Biochem Physiol B Biochem Mol Biol 2020; 253:110543. [PMID: 33301876 DOI: 10.1016/j.cbpb.2020.110543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 11/30/2020] [Accepted: 12/03/2020] [Indexed: 10/22/2022]
Abstract
Hibernation is an important winter survival strategy for many small mammals. By sinking into a deep torpor where metabolic rate can be as low as 1-5% of the resting rate in euthermia, animals accrue huge energy savings that allow survival, typically without eating, for many months. Hibernating ground squirrels show a net reduction in the total adenylate pool of skeletal muscle during torpor, but the ATP/ADP ratio and adenylate energy charge remain stable. A key enzyme involved in managing adenylate pool size is 5'-adenosine monophosphate deaminase (AMPD). Assessing skeletal muscle AMPD from both Richardson's ground squirrels (Urocitellus richardsonii) (RGS) and 13-lined ground squirrels (Ictidomys tridecemlineatus) (TLGS), the present study shows that muscle AMPD of euthermic versus hibernating animals displays markedly different kinetic properties, differential responses to temperature and to effectors, and is regulated by reversible protein phosphorylation. AMPD activity decreased during hibernation in both TLGS and RGS skeletal muscle, by 70 and 84%, respectively. Stimulation of total protein phosphatases, total serine/threonine protein phosphatases, PP1, PP2B or PP2C, all reduced AMPD activity between 54 and 92% in extracts of euthermic RGS muscle. The same incubation did not change the activity of AMPD from muscle of hibernating animals. Oppositely, both euthermic and hibernating AMPD showed a strong increase in activity when incubated under conditions that promoted the enzyme phosphorylation by PKA, PKC or PKG. Overall, the data indicate that both low activity of AMPD and low affinity of the enzyme for AMP during torpor reduce the rate of adenylate degradation, the primary driver of these changes being covalent phosphorylation of AMPD.
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Affiliation(s)
- Khalil Abnous
- Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Medicinal Chemistry, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Kenneth B Storey
- Institute of Biochemistry and Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada
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12
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Kopietz F, Rupar K, Berggreen C, Säll J, Vertommen D, Degerman E, Rider MH, Göransson O. Inhibition of AMPK activity in response to insulin in adipocytes: involvement of AMPK pS485, PDEs, and cellular energy levels. Am J Physiol Endocrinol Metab 2020; 319:E459-E471. [PMID: 32663099 DOI: 10.1152/ajpendo.00065.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Insulin resistance in obesity and type 2 diabetes has been shown to be associated with decreased de novo fatty acid (FA) synthesis in adipose tissue. It is known that insulin can acutely stimulate FA synthesis in adipocytes; however, the mechanisms underlying this effect are unclear. The rate-limiting step in FA synthesis is catalyzed by acetyl-CoA carboxylase (ACC), known to be regulated through inhibitory phosphorylation at S79 by the AMP-activated protein kinase (AMPK). Previous results from our laboratory showed an inhibition of AMPK activity by insulin, which was accompanied by PKB-dependent phosphorylation of AMPK at S485. However, whether the S485 phosphorylation is required for insulin-induced inhibition of AMPK or other mechanisms underlie the reduced kinase activity is not known. To investigate this, primary rat adipocytes were transduced with a recombinant adenovirus encoding AMPK-WT or a nonphosphorylatable AMPK S485A mutant. AMPK activity measurements by Western blot analysis and in vitro kinase assay revealed that WT and S485A AMPK were inhibited to a similar degree by insulin, indicating that AMPK S485 phosphorylation is not required for insulin-induced AMPK inhibition. Further analysis suggested an involvement of decreased AMP-to-ATP ratios in the insulin-induced inhibition of AMPK activity, whereas a possible contribution of phosphodiesterases was excluded. Furthermore, we show that insulin-induced AMPK S485 phosphorylation also occurs in human adipocytes, suggesting it to be of an importance yet to be revealed. Altogether, this study increases our understanding of how insulin regulates AMPK activity, and with that, FA synthesis, in adipose tissue.
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Affiliation(s)
| | - Kaja Rupar
- Department of Experimental Medical Science, Lund University, Sweden
| | | | - Johanna Säll
- Department of Experimental Medical Science, Lund University, Sweden
| | - Didier Vertommen
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Eva Degerman
- Department of Experimental Medical Science, Lund University, Sweden
| | - Mark H Rider
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Olga Göransson
- Department of Experimental Medical Science, Lund University, Sweden
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13
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Echaniz-Laguna A, Lornage X, Laforêt P, Orngreen MC, Edelweiss E, Brochier G, Bui MT, Silva-Rojas R, Birck C, Lannes B, Romero NB, Vissing J, Laporte J, Böhm J. A New Glycogen Storage Disease Caused by a Dominant PYGM Mutation. Ann Neurol 2020; 88:274-282. [PMID: 32386344 DOI: 10.1002/ana.25771] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 05/04/2020] [Accepted: 05/04/2020] [Indexed: 11/05/2022]
Abstract
OBJECTIVE Glycogen storage diseases (GSDs) are severe human disorders resulting from abnormal glucose metabolism, and all previously described GSDs segregate as autosomal recessive or X-linked traits. In this study, we aimed to molecularly characterize the first family with a dominant GSD. METHODS We describe a dominant GSD family with 13 affected members presenting with adult-onset muscle weakness, and we provide clinical, metabolic, histological, and ultrastructural data. We performed exome sequencing to uncover the causative gene, and functional experiments in the cell model and on recombinant proteins to investigate the pathogenic effect of the identified mutation. RESULTS We identified a heterozygous missense mutation in PYGM segregating with the disease in the family. PYGM codes for myophosphorylase, the enzyme catalyzing the initial step of glycogen breakdown. Enzymatic tests revealed that the PYGM mutation impairs the AMP-independent myophosphorylase activity, whereas the AMP-dependent activity was preserved. Further functional investigations demonstrated an altered conformation and aggregation of mutant myophosphorylase, and the concurrent accumulation of the intermediate filament desmin in the myofibers of the patients. INTERPRETATION Overall, this study describes the first example of a dominant glycogen storage disease in humans, and elucidates the underlying pathomechanisms by deciphering the sequence of events from the PYGM mutation to the accumulation of glycogen in the muscle fibers. ANN NEUROL 2020;88:274-282.
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Affiliation(s)
- Andoni Echaniz-Laguna
- Department of Neurology, APHP, CHU de Bicêtre, Le Kremlin Bicêtre, France.,French National Reference Center for Rare Neuropathies (NNERF), Le Kremlin Bicêtre, France.,Inserm U1195 & Paris-Saclay University, Le Kremlin Bicêtre, France
| | - Xavière Lornage
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France
| | - Pascal Laforêt
- Department of Neurology, Raymond Poincaré Hospital, Centre de Référence de Pathologie Neuromusculaire Nord-Est-Ile-de-France, Garches, France.,Service de Neurologie, U1179 UVSQ-INSERM Handicap Neuromusculaire: Physiologie, Biothérapie et Pharmacologie appliquées, UFR Simone Veil-Santé, Université Versailles-Saint-Quentin-en-Yvelines, Garches, France
| | - Mette C Orngreen
- Copenhagen Neuromuscular Center, University of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - Evelina Edelweiss
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France
| | - Guy Brochier
- Neuromuscular Morphology Unit, Myology Institute, GHU Pitié-Salpêtrière, Paris, France.,Centre de Référence de Pathologie Neuromusculaire Paris-Est, Institut de Myologie, GHU Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Mai T Bui
- Neuromuscular Morphology Unit, Myology Institute, GHU Pitié-Salpêtrière, Paris, France
| | - Roberto Silva-Rojas
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France
| | - Catherine Birck
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France.,Structural Biology & Genomics Platform, IGBMC, Illkirch, France
| | - Béatrice Lannes
- Department of Pathology, Strasbourg University Hospital, Strasbourg, France
| | - Norma B Romero
- Neuromuscular Morphology Unit, Myology Institute, GHU Pitié-Salpêtrière, Paris, France.,Centre de Référence de Pathologie Neuromusculaire Paris-Est, Institut de Myologie, GHU Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France.,Université Sorbonne, UPMC Paris 06 University, Inserm UMRS974, CNRS FRE3617, Center for Research in Myology, GH Pitié-Salpêtrière, Paris, France
| | - John Vissing
- Copenhagen Neuromuscular Center, University of Copenhagen, Rigshospitalet, Copenhagen, Denmark
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France
| | - Johann Böhm
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France
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14
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Klepinin A, Zhang S, Klepinina L, Rebane-Klemm E, Terzic A, Kaambre T, Dzeja P. Adenylate Kinase and Metabolic Signaling in Cancer Cells. Front Oncol 2020; 10:660. [PMID: 32509571 PMCID: PMC7248387 DOI: 10.3389/fonc.2020.00660] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 04/08/2020] [Indexed: 12/23/2022] Open
Abstract
A hallmark of cancer cells is the ability to rewire their bioenergetics and metabolic signaling circuits to fuel their uncontrolled proliferation and metastasis. Adenylate kinase (AK) is the critical enzyme in the metabolic monitoring of cellular adenine nucleotide homeostasis. It also directs AK→ AMP→ AMPK signaling controlling cell cycle and proliferation, and ATP energy transfer from mitochondria to distribute energy among cellular processes. The significance of AK isoform network in the regulation of a variety of cellular processes, which include cell differentiation and motility, is rapidly growing. Adenylate kinase 2 (AK2) isoform, localized in intermembrane and intra-cristae space, is vital for mitochondria nucleotide exchange and ATP export. AK2 deficiency disrupts cell energetics, causes severe human diseases, and is embryonically lethal in mice, signifying the importance of catalyzed phosphotransfer in cellular energetics. Suppression of AK phosphotransfer and AMP generation in cancer cells and consequently signaling through AMPK could be an important factor in the initiation of cancerous transformation, unleashing uncontrolled cell cycle and growth. Evidence also builds up that shift in AK isoforms is used later by cancer cells for rewiring energy metabolism to support their high proliferation activity and tumor progression. As cell motility is an energy-consuming process, positioning of AK isoforms to increased energy consumption sites could be an essential factor to incline cancer cells to metastases. In this review, we summarize recent advances in studies of the significance of AK isoforms involved in cancer cell metabolism, metabolic signaling, metastatic potential, and a therapeutic target.
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Affiliation(s)
- Aleksandr Klepinin
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Song Zhang
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Ljudmila Klepinina
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Egle Rebane-Klemm
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Andre Terzic
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Tuuli Kaambre
- Laboratory of Chemical Biology, National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
| | - Petras Dzeja
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
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15
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TLR9 and beclin 1 crosstalk regulates muscle AMPK activation in exercise. Nature 2020; 578:605-609. [PMID: 32051584 PMCID: PMC7047589 DOI: 10.1038/s41586-020-1992-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 12/12/2019] [Indexed: 11/09/2022]
Abstract
The activation of adenosine monophosphate-activated protein kinase (AMPK) in skeletal muscle coordinates systemic metabolic responses to exercise1. Autophagy-a lysosomal degradation pathway that maintains cellular homeostasis2-is upregulated during exercise, and a core autophagy protein, beclin 1, is required for AMPK activation in skeletal muscle3. Here we describe a role for the innate immune-sensing molecule Toll-like receptor 9 (TLR9)4, and its interaction with beclin 1, in exercise-induced activation of AMPK in skeletal muscle. Mice that lack TLR9 are deficient in both exercise-induced activation of AMPK and plasma membrane localization of the GLUT4 glucose transporter in skeletal muscle, but are not deficient in autophagy. TLR9 binds beclin 1, and this interaction is increased by energy stress (glucose starvation and endurance exercise) and decreased by a BCL2 mutation3,5 that blocks the disruption of BCL2-beclin 1 binding. TLR9 regulates the assembly of the endolysosomal phosphatidylinositol 3-kinase complex (PI3KC3-C2)-which contains beclin 1 and UVRAG-in skeletal muscle during exercise, and knockout of beclin 1 or UVRAG inhibits the cellular AMPK activation induced by glucose starvation. Moreover, TLR9 functions in a muscle-autonomous fashion in ex vivo contraction-induced AMPK activation, glucose uptake and beclin 1-UVRAG complex assembly. These findings reveal a heretofore undescribed role for a Toll-like receptor in skeletal-muscle AMPK activation and glucose metabolism during exercise, as well as unexpected crosstalk between this innate immune sensor and autophagy proteins.
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16
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Johanns M, Kviklyte S, Chuang SJ, Corbeels K, Jacobs R, Herinckx G, Vertommen D, Schakman O, Duparc T, Cani PD, Bouzin C, Andersén H, Bohlooly-Y M, Van der Schueren B, Oscarsson J, Rider MH. Genetic deletion of soluble 5'-nucleotidase II reduces body weight gain and insulin resistance induced by a high-fat diet. Mol Genet Metab 2019; 126:377-387. [PMID: 30803894 DOI: 10.1016/j.ymgme.2019.01.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 12/19/2018] [Accepted: 01/21/2019] [Indexed: 11/30/2022]
Abstract
We previously investigated whether inhibition of AMP-metabolizing enzymes could enhance AMP-activated protein kinase (AMPK) activation in skeletal muscle for the treatment of type 2 diabetes. Soluble 5'-nucleotidase II (NT5C2) hydrolyzes IMP and its inhibition could potentially lead to a rise in AMP to activate AMPK. In the present study, we investigated effects of NT5C2 deletion in mice fed a normal-chow diet (NCD) or a high-fat diet (HFD). On a NCD, NT5C2 deletion did not result in any striking metabolic phenotype. On a HFD however, NT5C2 knockout (NT5C2-/-) mice displayed reduced body/fat weight gain, improved glucose tolerance, reduced plasma insulin, triglyceride and uric acid levels compared with wild-type (WT) mice. There was a tendency towards smaller and fewer adipocytes in epididymal fat from NT5C2-/- mice compared to WT mice, consistent with a reduction in triglyceride content. Differences in fat mass under HFD could not be explained by changes in mRNA expression profiles of epididymal fat from WT versus NT5C2-/- mice. However, rates of lipolysis tended to increase in epididymal fat pads from NT5C2-/- versus WT mice, which might explain reduced fat mass. In incubated skeletal muscles, insulin-stimulated glucose uptake and associated signalling were enhanced in NT5C2-/- versus WT mice on HFD, which might contribute towards improved glycemic control. In summary, NT5C2 deletion in mice protects against HFD-induced weight gain, adiposity, insulin resistance and associated hyperglycemia.
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Affiliation(s)
- Manuel Johanns
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate 75, B-1200 Brussels, Belgium
| | - Samanta Kviklyte
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate 75, B-1200 Brussels, Belgium
| | - Sheng-Ju Chuang
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate 75, B-1200 Brussels, Belgium
| | - Katrien Corbeels
- Klinische en Experimentele Endocrinologie, Katholieke Universiteit Leuven, Herestraat 49, B-3000 Leuven, Belgium
| | - Roxane Jacobs
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate 75, B-1200 Brussels, Belgium
| | - Gaëtan Herinckx
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate 75, B-1200 Brussels, Belgium
| | - Didier Vertommen
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate 75, B-1200 Brussels, Belgium
| | - Olivier Schakman
- Université catholique de Louvain and Institute of Neuroscience, Avenue Mounier 53, B-1200 Brussels, Belgium
| | - Thibaut Duparc
- Université catholique de Louvain and WELBIO (Waloon Excellence in Life Sciences and Biotechnology), Louvain Drug Research Institute, Avenue Mounier 73, B-1200 Brussels, Belgium
| | - Patrice D Cani
- Université catholique de Louvain and WELBIO (Waloon Excellence in Life Sciences and Biotechnology), Louvain Drug Research Institute, Avenue Mounier 73, B-1200 Brussels, Belgium
| | - Caroline Bouzin
- Université catholique de Louvain and Institute of Clinical and Experimental Research, Avenue Hippocrate 55, B-1200 Brussels, Belgium
| | - Harriet Andersén
- Discovery Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | | | - Bart Van der Schueren
- Klinische en Experimentele Endocrinologie, Katholieke Universiteit Leuven, Herestraat 49, B-3000 Leuven, Belgium
| | - Jan Oscarsson
- Discovery Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Mark H Rider
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate 75, B-1200 Brussels, Belgium.
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17
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Johnson TA, Jinnah HA, Kamatani N. Shortage of Cellular ATP as a Cause of Diseases and Strategies to Enhance ATP. Front Pharmacol 2019; 10:98. [PMID: 30837873 PMCID: PMC6390775 DOI: 10.3389/fphar.2019.00098] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 01/24/2019] [Indexed: 12/14/2022] Open
Abstract
Germline mutations in cellular-energy associated genes have been shown to lead to various monogenic disorders. Notably, mitochondrial disorders often impact skeletal muscle, brain, liver, heart, and kidneys, which are the body’s top energy-consuming organs. However, energy-related dysfunctions have not been widely seen as causes of common diseases, although evidence points to such a link for certain disorders. During acute energy consumption, like extreme exercise, cells increase the favorability of the adenylate kinase reaction 2-ADP -> ATP+AMP by AMP deaminase degrading AMP to IMP, which further degrades to inosine and then to purines hypoxanthine -> xanthine -> urate. Thus, increased blood urate levels may act as a barometer of extreme energy consumption. AMP deaminase deficient subjects experience some negative effects like decreased muscle power output, but also positive effects such as decreased diabetes and improved prognosis for chronic heart failure patients. That may reflect decreased energy consumption from maintaining the pool of IMP for salvage to AMP and then ATP, since de novo IMP synthesis requires burning seven ATPs. Similarly, beneficial effects have been seen in heart, skeletal muscle, or brain after treatment with allopurinol or febuxostat to inhibit xanthine oxidoreductase, which catalyzes hypoxanthine -> xanthine and xanthine -> urate reactions. Some disorders of those organs may reflect dysfunction in energy-consumption/production, and the observed beneficial effects related to reinforcement of ATP re-synthesis due to increased hypoxanthine levels in the blood and tissues. Recent clinical studies indicated that treatment with xanthine oxidoreductase inhibitors plus inosine had the strongest impact for increasing the pool of salvageable purines and leading to increased ATP levels in humans, thereby suggesting that this combination is more beneficial than a xanthine oxidoreductase inhibitor alone to treat disorders with ATP deficiency.
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Affiliation(s)
| | - H A Jinnah
- Departments of Neurology and Human Genetics, Emory University School of Medicine, Atlanta, GA, United States
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18
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Ducommun S, Deak M, Zeigerer A, Göransson O, Seitz S, Collodet C, Madsen AB, Jensen TE, Viollet B, Foretz M, Gut P, Sumpton D, Sakamoto K. Chemical genetic screen identifies Gapex-5/GAPVD1 and STBD1 as novel AMPK substrates. Cell Signal 2019; 57:45-57. [PMID: 30772465 DOI: 10.1016/j.cellsig.2019.02.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/31/2019] [Accepted: 02/01/2019] [Indexed: 02/06/2023]
Abstract
AMP-activated protein kinase (AMPK) is a key regulator of cellular energy homeostasis, acting as a sensor of energy and nutrient status. As such, AMPK is considered a promising drug target for treatment of medical conditions particularly associated with metabolic dysfunctions. To better understand the downstream effectors and physiological consequences of AMPK activation, we have employed a chemical genetic screen in mouse primary hepatocytes in an attempt to identify novel AMPK targets. Treatment of hepatocytes with a potent and specific AMPK activator 991 resulted in identification of 65 proteins phosphorylated upon AMPK activation, which are involved in a variety of cellular processes such as lipid/glycogen metabolism, vesicle trafficking, and cytoskeleton organisation. Further characterisation and validation using mass spectrometry followed by immunoblotting analysis with phosphorylation site-specific antibodies identified AMPK-dependent phosphorylation of Gapex-5 (also known as GTPase-activating protein and VPS9 domain-containing protein 1 (GAPVD1)) on Ser902 in hepatocytes and starch-binding domain 1 (STBD1) on Ser175 in multiple cells/tissues. As new promising roles of AMPK as a key metabolic regulator continue to emerge, the substrates we identified could provide new mechanistic and therapeutic insights into AMPK-activating drugs in the liver.
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Affiliation(s)
- Serge Ducommun
- Nestlé Research, École Polytechnique Fédérale de Lausanne (EPFL) Innovation Park, bâtiment G, 1015 Lausanne, Switzerland; School of Life Sciences, EPFL, 1015 Lausanne, Switzerland
| | - Maria Deak
- Nestlé Research, École Polytechnique Fédérale de Lausanne (EPFL) Innovation Park, bâtiment G, 1015 Lausanne, Switzerland
| | - Anja Zeigerer
- Institute for Diabetes and Cancer, Helmholtz Center for Environmental Health, 85764 Neuherberg, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Olga Göransson
- Department of Experimental Medical Sciences, Lund University, 221 84 Lund, Sweden
| | - Susanne Seitz
- Institute for Diabetes and Cancer, Helmholtz Center for Environmental Health, 85764 Neuherberg, Germany; Joint Heidelberg-IDC Translational Diabetes Program, Inner Medicine 1, Heidelberg University Hospital, Heidelberg, Germany; German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Caterina Collodet
- Nestlé Research, École Polytechnique Fédérale de Lausanne (EPFL) Innovation Park, bâtiment G, 1015 Lausanne, Switzerland; School of Life Sciences, EPFL, 1015 Lausanne, Switzerland
| | - Agnete B Madsen
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Thomas E Jensen
- Department of Nutrition, Exercise and Sports, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Benoit Viollet
- Inserm, U1016, Institut Cochin, Paris, France; CNRS, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris cité, Paris, France
| | - Marc Foretz
- Inserm, U1016, Institut Cochin, Paris, France; CNRS, UMR8104, Paris, France; Université Paris Descartes, Sorbonne Paris cité, Paris, France
| | - Philipp Gut
- Nestlé Research, École Polytechnique Fédérale de Lausanne (EPFL) Innovation Park, bâtiment G, 1015 Lausanne, Switzerland
| | - David Sumpton
- Cancer Research UK Beatson Institute, Glasgow G61 1BD, UK
| | - Kei Sakamoto
- Nestlé Research, École Polytechnique Fédérale de Lausanne (EPFL) Innovation Park, bâtiment G, 1015 Lausanne, Switzerland; School of Life Sciences, EPFL, 1015 Lausanne, Switzerland.
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19
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Wang L, Chao Z, Wang Y. Identification of Two Novel Single Nucleotide Polymorphisms in the Promoter Region of the Pig AMP Deaminase 1 Gene Associated with Carcass Traits. DNA Cell Biol 2018; 37:896-902. [PMID: 30234378 DOI: 10.1089/dna.2018.4293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The AMP deaminase 1 (AMPD1) gene plays an important role in purine nucleotide interconversion and energy metabolism. In this study, two novel single nucleotide polymorphisms (SNPs) (g.-626 G > A and g.-566 A>G) were detected in the proximal promoter region of the AMPD1 gene. The Chinese indigenous pig breeds (Meishan and Tongcheng) had higher frequencies of the G and A alleles than Western meat-type breeds (Landrace and Large White) at the g.-626 G > A and g.-566 A>G loci. The transcriptional activity of the AMPD1 promoter carrying the haplotype H1 (A-626G-566) was significantly (p < 0.05) higher than that of the haplotype H2 (G-626A-566). In addition, pigs with the haplotype combination H1H1 had significantly (p < 0.05) higher mRNA expression levels of the AMPD1 gene than those with haplotype combinations H1H2 and H2H2 in two different skeletal muscles. Association analyses revealed that the pigs with the haplotype combination H1H1 had significantly higher lean meat percentage values but lower average backfat thickness (ABT, cm), buttock fat thickness (cm), and thorax-waist fat thickness (cm) values than the pigs with the haplotype combinations H1H2 and H2H2. These findings demonstrate that the two novel SNPs in the promoter region of the AMPD1 gene have significant associations with pig fat deposition traits.
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Affiliation(s)
- Linjie Wang
- 1 Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University , Chengdu, P.R. China
| | - Zhe Chao
- 2 Institute of Animal Science and Veterinary Medicine , Hainan Academy of Agricultural Sciences, Haikou, P.R. China
| | - Yan Wang
- 1 Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, College of Animal Science and Technology, Sichuan Agricultural University , Chengdu, P.R. China
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20
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Camici M, Allegrini S, Tozzi MG. Interplay between adenylate metabolizing enzymes and AMP-activated protein kinase. FEBS J 2018; 285:3337-3352. [PMID: 29775996 DOI: 10.1111/febs.14508] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/04/2018] [Accepted: 05/14/2018] [Indexed: 12/26/2022]
Abstract
Purine nucleotides are involved in a variety of cellular functions, such as energy storage and transfer, and signalling, in addition to being the precursors of nucleic acids and cofactors of many biochemical reactions. They can be generated through two separate pathways, the de novo biosynthesis pathway and the salvage pathway. De novo purine biosynthesis leads to the formation of IMP, from which the adenylate and guanylate pools are generated by two additional steps. The salvage pathways utilize hypoxanthine, guanine and adenine to generate the corresponding mononucleotides. Despite several decades of research on the subject, new and surprising findings on purine metabolism are constantly being reported, and some aspects still need to be elucidated. Recently, purine biosynthesis has been linked to the metabolic pathways regulated by AMP-activated protein kinase (AMPK). AMPK is the master regulator of cellular energy homeostasis, and its activity depends on the AMP : ATP ratio. The cellular energy status and AMPK activation are connected by AMP, an allosteric activator of AMPK. Hence, an indirect strategy to affect AMPK activity would be to target the pathways that generate AMP in the cell. Herein, we report an up-to-date review of the interplay between AMPK and adenylate metabolizing enzymes. Some aspects of inborn errors of purine metabolism are also discussed.
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21
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Tatekoshi Y, Tanno M, Kouzu H, Abe K, Miki T, Kuno A, Yano T, Ishikawa S, Ohwada W, Sato T, Niinuma T, Suzuki H, Miura T. Translational regulation by miR-301b upregulates AMP deaminase in diabetic hearts. J Mol Cell Cardiol 2018; 119:138-146. [PMID: 29733818 DOI: 10.1016/j.yjmcc.2018.05.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 04/17/2018] [Accepted: 05/03/2018] [Indexed: 12/11/2022]
Abstract
AMP deaminase (AMPD) plays a crucial role in adenine nucleotide metabolism. Recently we found that upregulated AMPD activity is associated with ATP depletion and contractile dysfunction under the condition of pressure overloading in the heart of a rat model of type 2 diabetes mellitus (T2DM), OLETF. Here we examined the mechanism of AMPD upregulation by T2DM. The protein level of 90-kDa full-length AMPD3 was increased in whole myocardial lysates by 55% in OLETF compared to those in LETO, a non-diabetic control. In contrast, the mRNA levels of AMPD3 in the myocardium were similar in OLETF and LETO. AMPD3 was comparably ubiquitinated in OLETF and LETO, and its degradation ex vivo was more sensitive to MG-132, a proteasome inhibitor, in OLETF than in LETO. MicroRNA array analysis revealed downregulation (>50%) of 57 microRNAs in OLETF compared to those in LETO, among which miR-301b was predicted to interact with the 3'UTR of AMPD3 mRNA. AMPD3 protein level was significantly increased by a miR-301b inhibitor and was decreased by a miR-301b mimetic in H9c2 cells. A luciferase reporter assay confirmed binding of miR-301b to the 3'UTR of AMPD3 mRNA. Transfection of neonatal rat cardiomyocytes with a miR-301b inhibitor increased 90-kDa AMPD3 and reduced ATP level. The results indicate that translational regulation by miR-301b mediates upregulated expression of cardiac AMPD3 protein in OLETF, which potentially reduces the adenine nucleotide pool at the time of increased work load. The miR-301b-AMPD3 axis may be a novel therapeutic target for intervening enegy metabolism in diabetic hearts.
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Affiliation(s)
- Yuki Tatekoshi
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Masaya Tanno
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Hidemichi Kouzu
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Koki Abe
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takayuki Miki
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Atsushi Kuno
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan; Department of Pharmacology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Toshiyuki Yano
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Satoko Ishikawa
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Wataru Ohwada
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tatsuya Sato
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan; Department of Cellular Physiology and Signal Transduction, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Takeshi Niinuma
- Department of Molecular Biology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Hiromu Suzuki
- Department of Molecular Biology, Sapporo Medical University School of Medicine, Sapporo, Japan
| | - Tetsuji Miura
- Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
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22
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Abstract
AMPK is a highly conserved master regulator of metabolism, which restores energy balance during metabolic stress both at the cellular and physiological levels. The identification of numerous AMPK targets has helped explain how AMPK restores energy homeostasis. Recent advancements illustrate novel mechanisms of AMPK regulation, including changes in subcellular localization and phosphorylation by non-canonical upstream kinases. Notably, the therapeutic potential of AMPK is widely recognized and heavily pursued for treatment of metabolic diseases such as diabetes, but also obesity, inflammation, and cancer. Moreover, the recently solved crystal structure of AMPK has shed light both into how nucleotides activate AMPK and, importantly, also into the sites bound by small molecule activators, thus providing a path for improved drugs.
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Affiliation(s)
- Daniel Garcia
- The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Reuben J Shaw
- The Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, CA 92037, USA.
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23
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Kviklyte S, Vertommen D, Yerna X, Andersén H, Xu X, Gailly P, Bohlooly-Y M, Oscarsson J, Rider MH. Effects of genetic deletion of soluble 5'-nucleotidases NT5C1A and NT5C2 on AMPK activation and nucleotide levels in contracting mouse skeletal muscles. Am J Physiol Endocrinol Metab 2017; 313:E48-E62. [PMID: 28325731 DOI: 10.1152/ajpendo.00304.2016] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 02/24/2017] [Accepted: 03/13/2017] [Indexed: 11/22/2022]
Abstract
AMP-activated protein kinase (AMPK) plays a key role in energy homeostasis and is activated in response to contraction-induced ATP depletion in skeletal muscle via a rise in intracellular AMP/ADP concentrations. AMP can be deaminated by AMP-deaminase (AMPD) to IMP, which is hydrolyzed to inosine by cytosolic 5'-nucleotidase II (NT5C2). AMP can also be hydrolyzed to adenosine by cytosolic 5'-nucleotidase 1A (NT5C1A). Previous gene silencing and overexpression studies indicated control of AMPK activation by NT5C enzymes. In the present study using gene knockout mouse models, we investigated the effects of NT5C1A and NT5C2 deletion on intracellular adenine nucleotide levels and AMPK activation in electrically stimulated skeletal muscles. Surprisingly, NT5C enzyme knockout did not lead to enhanced AMP or ADP concentrations in response to contraction, with no potentiation of increases in AMPK activity in extensor digitorum longus (EDL) and soleus mouse muscles. Moreover, dual blockade of AMP metabolism in EDL using an AMPD inhibitor combined with NT5C1A deletion did not enhance rises in AMP and ADP or increased AMPK activation by electrical stimulation. The results on muscles from the NT5C knockout mice contradict previous findings where AMP levels and AMPK activity were shown to be modulated by NT5C enzymes.
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Affiliation(s)
- Samanta Kviklyte
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Didier Vertommen
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium
| | - Xavier Yerna
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium; and
| | | | - Xiufeng Xu
- AstraZeneca Research and Development, Mölndal, Sweden
| | - Philippe Gailly
- Institute of Neuroscience, Université catholique de Louvain, Brussels, Belgium; and
| | | | - Jan Oscarsson
- AstraZeneca Research and Development, Mölndal, Sweden
| | - Mark H Rider
- de Duve Institute, Université catholique de Louvain, Brussels, Belgium;
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24
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Simple oxygraphic analysis for the presence of adenylate kinase 1 and 2 in normal and tumor cells. J Bioenerg Biomembr 2016; 48:531-548. [PMID: 27854030 DOI: 10.1007/s10863-016-9687-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Accepted: 10/31/2016] [Indexed: 01/09/2023]
Abstract
The adenylate kinase (AK) isoforms network plays an important role in the intracellular energy transfer processes, the maintenance of energy homeostasis, and it is a major player in AMP metabolic signaling circuits in some highly-differentiated cells. For this purpose, a rapid and sensitive method was developed that enables to estimate directly and semi-quantitatively the distribution between cytosolic AK1 and mitochondrial AK2 localized in the intermembrane space, both in isolated cells and tissue samples (biopsy material). Experiments were performed on isolated rat mitochondria or permeabilized material, including undifferentiated and differentiated neuroblastoma Neuro-2a cells, HL-1 cells, isolated rat heart cardiomyocytes as well as on human breast cancer postoperative samples. In these samples, the presence of AK1 and AK2 could be detected by high-resolution respirometry due to the functional coupling of these enzymes with ATP synthesis. By eliminating extra-mitochondrial ADP with an excess of pyruvate kinase and its substrate phosphoenolpyruvate, the coupling of the AK reaction with mitochondrial ATP synthesis could be quantified for total AK and mitochondrial AK2 as a specific AK index. In contrast to the creatine kinase pathway, the AK phosphotransfer pathway is up-regulated in murine neuroblastoma and HL-1 sarcoma cells and in these malignant cells expression of AK2 is higher than AK1. Differentiated Neuro-2a neuroblastoma cells exhibited considerably higher OXPHOS capacity than undifferentiated cells, and this was associated with a remarkable decrease in their AK activity. The respirometric method also revealed a considerable difference in mitochondrial affinity for AMP between non-transformed cells and tumor cells.
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25
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Pan Y, Zhang L, Liu Q, Li Y, Guo H, Peng Y, Peng H, Tang B, Hu Z, Zhao J, Xia K, Li JD. Insertion of a knockout-first cassette in Ampd1 gene leads to neonatal death by disruption of neighboring genes expression. Sci Rep 2016; 6:35970. [PMID: 27775065 PMCID: PMC5075929 DOI: 10.1038/srep35970] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 10/10/2016] [Indexed: 11/30/2022] Open
Abstract
AMPD1 is an adenosine monophosphate deaminase that catalyzes the deamination of AMP to IMP. To understand the physiological function of AMPD1, we obtained a strain of Ampd1 mutant mice from KOMP repository, which was generated by a knockout-first strategy. An elevated AMP level and almost complete lack of IMP was detected in the skeletal muscle of E18.5 Ampd1tm1a/tm1a mice. However, Ampd1tm1a/tm1a mice died in 2 days postnatally, which was contradicting to previous reports. After removal of the knockout-first cassette and critical exon, mice homozygous for the Ampd1tm1c/tm1c and Ampd1tm1d/tm1d alleles survived to adulthood. RNA-seq analysis indicated that the expression of two neighboring genes, Man1a2 and Nras, were disrupted in the Ampd1tm1a/tm1a mice, but normal in the Ampd1tm1c/tm1c and Ampd1tm1d/tm1d mice. The neonatal lethality phenotype in the Ampd1tm1a/tm1a mice was consistent with the Man1a2-deficient mice. Our results indicated the knockout-first cassette may cause off-target effect by influence the expression of neighboring genes. This study, together with other reports, strongly suggests that removal of targeting cassette by site-specific recombinases is very important for the accurate phenotypic interpretation on mice generated by target mutations.
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Affiliation(s)
- Yongcheng Pan
- Key laboratory of Hunan Province in Neurodegenerative Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China.,The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Lusi Zhang
- Department of Ophthalmology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China.,The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Qiong Liu
- The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Ying Li
- The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Hui Guo
- The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Yu Peng
- The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Hexiang Peng
- The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Beisha Tang
- Key laboratory of Hunan Province in Neurodegenerative Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China.,The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China.,Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhengmao Hu
- The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Jingping Zhao
- Mental Health Institute of the Second Xiangya Hospital, Key Laboratory of Psychiatry and Mental Health of Hunan Province, Central South University, Changsha, Hunan, China
| | - Kun Xia
- The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China.,College of Life Science and Technology, Xinjiang University, Xinjiang, China.,Collaborative Innovation Center for Genetics and Development, Shanghai, China
| | - Jia-Da Li
- Key laboratory of Hunan Province in Neurodegenerative Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China.,The State Key Laboratory of Medical Genetics and School of Life Sciences, Central South University, Changsha, Hunan, China.,Collaborative Innovation Center for Genetics and Development, Shanghai, China
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26
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Johanns M, Lai YC, Hsu MF, Jacobs R, Vertommen D, Van Sande J, Dumont JE, Woods A, Carling D, Hue L, Viollet B, Foretz M, Rider MH. AMPK antagonizes hepatic glucagon-stimulated cyclic AMP signalling via phosphorylation-induced activation of cyclic nucleotide phosphodiesterase 4B. Nat Commun 2016; 7:10856. [PMID: 26952277 PMCID: PMC4786776 DOI: 10.1038/ncomms10856] [Citation(s) in RCA: 101] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Accepted: 01/27/2016] [Indexed: 11/14/2022] Open
Abstract
Biguanides such as metformin have previously been shown to antagonize hepatic glucagon-stimulated cyclic AMP (cAMP) signalling independently of AMP-activated protein kinase (AMPK) via direct inhibition of adenylate cyclase by AMP. Here we show that incubation of hepatocytes with the small-molecule AMPK activator 991 decreases glucagon-stimulated cAMP accumulation, cAMP-dependent protein kinase (PKA) activity and downstream PKA target phosphorylation. Moreover, incubation of hepatocytes with 991 increases the Vmax of cyclic nucleotide phosphodiesterase 4B (PDE4B) without affecting intracellular adenine nucleotide concentrations. The effects of 991 to decrease glucagon-stimulated cAMP concentrations and activate PDE4B are lost in hepatocytes deleted for both catalytic subunits of AMPK. PDE4B is phosphorylated by AMPK at three sites, and by site-directed mutagenesis, Ser304 phosphorylation is important for activation. In conclusion, we provide a new mechanism by which AMPK antagonizes hepatic glucagon signalling via phosphorylation-induced PDE4B activation. The diabetes drug Metformin decreases hepatic glucose production and activates AMP-activated protein kinase (AMPK). Here the authors provide evidence that AMPK activation antagonizes glucagon signalling by activating PDE4B, lowering cAMP levels and decreasing PKA activation.
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Affiliation(s)
- M Johanns
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate, 75, 1200 Brussels, Belgium
| | - Y-C Lai
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate, 75, 1200 Brussels, Belgium
| | - M-F Hsu
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate, 75, 1200 Brussels, Belgium
| | - R Jacobs
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate, 75, 1200 Brussels, Belgium
| | - D Vertommen
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate, 75, 1200 Brussels, Belgium
| | - J Van Sande
- Faculté de Médecine, Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Université Libre de Bruxelles (ULB), Route de Lennik, 808, 1070 Brussels, Belgium
| | - J E Dumont
- Faculté de Médecine, Institut de Recherche Interdisciplinaire en Biologie Humaine et Moléculaire (IRIBHM), Université Libre de Bruxelles (ULB), Route de Lennik, 808, 1070 Brussels, Belgium
| | - A Woods
- Cellular Stress Group, MRC Clinical Sciences Centre, Imperial College London, Hammersmith Hospital, DuCane Road, London W12 0NN, UK
| | - D Carling
- Cellular Stress Group, MRC Clinical Sciences Centre, Imperial College London, Hammersmith Hospital, DuCane Road, London W12 0NN, UK
| | - L Hue
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate, 75, 1200 Brussels, Belgium
| | - B Viollet
- INSERM U1016, Institut Cochin, 75014 Paris, France.,CNRS UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75014 Paris, France
| | - M Foretz
- INSERM U1016, Institut Cochin, 75014 Paris, France.,CNRS UMR8104, 75014 Paris, France.,Université Paris Descartes, Sorbonne Paris Cité, 75014 Paris, France
| | - M H Rider
- Université catholique de Louvain and de Duve Institute, Avenue Hippocrate, 75, 1200 Brussels, Belgium
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27
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Anderson KJ, Vermillion KL, Jagtap P, Johnson JE, Griffin TJ, Andrews MT. Proteogenomic Analysis of a Hibernating Mammal Indicates Contribution of Skeletal Muscle Physiology to the Hibernation Phenotype. J Proteome Res 2016; 15:1253-61. [DOI: 10.1021/acs.jproteome.5b01138] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Kyle J. Anderson
- Department
of Biology, University of Minnesota Duluth, 1035 Kirby Drive, Duluth, Minnesota 55812, United States
| | - Katie L. Vermillion
- Department
of Biology, University of Minnesota Duluth, 1035 Kirby Drive, Duluth, Minnesota 55812, United States
| | - Pratik Jagtap
- Center
for Mass Spectrometry and Proteomics, University of Minnesota, 1479 Gortner
Avenue, St. Paul, Minnesota 55108, Unites States
- Department
of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, 321 Church Streey South East, Minneapolis, Minnesota 55455, United States
| | - James E. Johnson
- Minnesota Supercomputing Institute, 512 Walter Library, 117 Pleasant Street South East, Minneapolis, Minnesota 55455, United States
| | - Timothy J. Griffin
- Center
for Mass Spectrometry and Proteomics, University of Minnesota, 1479 Gortner
Avenue, St. Paul, Minnesota 55108, Unites States
- Department
of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, 321 Church Streey South East, Minneapolis, Minnesota 55455, United States
| | - Matthew T. Andrews
- Department
of Biology, University of Minnesota Duluth, 1035 Kirby Drive, Duluth, Minnesota 55812, United States
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28
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Admyre T, Amrot-Fors L, Andersson M, Bauer M, Bjursell M, Drmota T, Hallen S, Hartleib-Geschwindner J, Lindmark B, Liu J, Löfgren L, Rohman M, Selmi N, Wallenius K. Inhibition of AMP deaminase activity does not improve glucose control in rodent models of insulin resistance or diabetes. ACTA ACUST UNITED AC 2015; 21:1486-96. [PMID: 25459661 DOI: 10.1016/j.chembiol.2014.09.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 08/08/2014] [Accepted: 09/03/2014] [Indexed: 12/20/2022]
Abstract
Inhibition of AMP deaminase (AMPD) holds the potential to elevate intracellular adenosine and AMP levels and, therefore, to augment adenosine signaling and activation of AMP-activated protein kinase (AMPK). To test the latter hypothesis, novel AMPD pan inhibitors were synthesized and explored using a panel of in vitro, ex vivo, and in vivo models focusing on confirming AMPD inhibitory potency and the potential of AMPD inhibition to improve glucose control in vivo. Repeated dosing of selected inhibitors did not improve glucose control in insulin-resistant or diabetic rodent disease models. Mice with genetic deletion of the muscle-specific isoform Ampd1 did not showany favorable metabolic phenotype despite being challenged with high-fat diet feeding. Therefore, these results do not support the development of AMPD inhibitors for the treatment of type 2 diabetes.
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29
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Rider MH. Role of AMP-activated protein kinase in metabolic depression in animals. J Comp Physiol B 2015; 186:1-16. [PMID: 26174210 DOI: 10.1007/s00360-015-0920-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/23/2015] [Accepted: 07/01/2015] [Indexed: 01/24/2023]
Abstract
AMP-activated protein kinase (AMPK) is a highly conserved eukaryotic protein serine/threonine kinase that controls cellular and whole body energy homoeostasis. AMPK is activated during energy stress by a rise in AMP:ATP ratio and maintains energy balance by phosphorylating targets to switch on catabolic ATP-generating pathways, while at the same time switching off anabolic ATP-consuming processes. Metabolic depression is a strategy used by many animals to survive environmental stress and has been extensively studied across phylogeny by comparative biochemists and physiologists, but the role of AMPK has only recently been addressed. This review first deals with the evolution of AMPK in eukaryotes (excluding plants and fungi) and its regulation. Changes in adenine nucleotides and AMPK activation are described in animals during environmental energy stress, before considering the involvement of AMPK in controlling β-oxidation, fatty acid synthesis, triacylglycerol mobilization and protein synthesis. Lastly, strategies are presented to validate the role of AMPK in mediating metabolic depression by phosphorylating downstream targets.
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Affiliation(s)
- Mark H Rider
- de Duve Institute and Université Catholique de Louvain, Avenue Hippocrate 75, 1200, Brussels, Belgium.
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30
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Inhibition of AMP deaminase as therapeutic target in cardiovascular pathology. Pharmacol Rep 2015; 67:682-8. [PMID: 26321268 DOI: 10.1016/j.pharep.2015.04.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 04/10/2015] [Accepted: 04/14/2015] [Indexed: 11/20/2022]
Abstract
AMP deaminase (AMPD; EC 3.5.4.6) catalyzes hydrolysis of the amino group from the adenine ring of AMP resulting in production of inosine 5'-monophosphate (IMP) and ammonia. This reaction helps to maintain healthy cellular energetics by removing excess AMP that accumulates in energy depleted cells. Furthermore, AMPD permits the synthesis of guanine nucleotides from the larger adenylate pool. This enzyme competes with cytosolic 5'-nucleotidases (c5NT) for AMP. Adenosine, a product of c5NT is a vasodilator, antagonizes inotropic effects of catecholamines and exerts anti-platelet, anti-inflammatory and immunosuppressive activities. The ratio of AMPD/c5NT defines the amount of adenosine produced in adenine nucleotide catabolic pathway. Inhibition of AMPD could alter this ratio resulting in increased adenosine production. Besides the potential effect on adenosine production, elevation of AMP due to inhibition of AMPD could also lead to activation of AMP regulated protein kinase (AMPK) with myriad of downstream events including enhanced energetic metabolism, mitochondrial biogenesis and cytoprotection. While the benefits of these processes are well appreciated in cells such as skeletal or cardiac myocytes its role in protection of endothelium could be even more important. Therapeutic use of AMPD inhibition has been limited due to difficulties with obtaining compounds with adequate characteristics. However, endothelium seems to be the easiest target as effective inhibition of AMPD could be achieved at much lower concentration than in the other types of cells. New generation of AMPD inhibitors has recently been established and its testing in context of endothelial and organ protection could provide important basic knowledge and potential therapeutic tools.
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31
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Cheng J, Morisaki H, Toyama K, Sugimoto N, Shintani T, Tandelilin A, Hirase T, Holmes EW, Morisaki T. AMPD1: a novel therapeutic target for reversing insulin resistance. BMC Endocr Disord 2014; 14:96. [PMID: 25511531 PMCID: PMC4274759 DOI: 10.1186/1472-6823-14-96] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 12/09/2014] [Indexed: 04/20/2023] Open
Abstract
BACKGROUND Insulin resistance is one of the hallmark manifestations of obesity and Type II diabetes and reversal of this pathogenic abnormality is an attractive target for new therapies for Type II diabetes. A recent report that metformin, a drug known to reverse insulin resistance, demonstrated in vitro the metformin can inhibit AMP deaminase (AMPD) activity. Skeletal muscle is one of the primary organs contributing to insulin resistance and that the AMPD1 gene is selectively expressed at high levels in skeletal muscle. METHODS Recognizing the background above, we asked if genetic disruption of the AMPD1 gene might ameliorate the manifestations of insulin resistance. AMPD1 deficient homozygous mice and control mice fed normal chow diet or a high-fat diet, and blood analysis, glucose tolerance test and insulin tolerance test were performed. Also, skeletal muscle metabolism and gene expression including nucleotide levels and activation of AMP activated protein kinase (AMP kinase) were evaluated in both conditions. RESULTS Disruption of the AMPD1 gene leads to a less severe state of insulin resistance, improved glucose tolerance and enhanced insulin clearance in mice fed a high fat diet. Given the central role of AMP kinase in insulin action, and its response to changes in AMP concentrations in the cell, we examined the skeletal muscle of the AMPD1 deficient mice and found that they have greater AMP kinase activity as evidenced by higher levels of phosphorylated AMP kinase. CONCLUSIONS Taken together these data suggest that AMPD may be a new drug target for the reversal of insulin resistance and the treatment of Type II diabetes.
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Affiliation(s)
- Jidong Cheng
- />Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565 Japan
- />Department of Internal Medicine, The First Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515031 P. R. China
| | - Hiroko Morisaki
- />Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565 Japan
| | - Keiko Toyama
- />Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565 Japan
- />Department of Molecular Pathophysiology, Osaka University Graduate School of Pharmaceutical Sciences, Suita, Osaka, Japan
| | - Naomi Sugimoto
- />Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565 Japan
- />Department of Molecular Pathophysiology, Osaka University Graduate School of Pharmaceutical Sciences, Suita, Osaka, Japan
| | - Takuya Shintani
- />Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565 Japan
- />Department of Molecular Pathophysiology, Osaka University Graduate School of Pharmaceutical Sciences, Suita, Osaka, Japan
| | - Andreas Tandelilin
- />Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565 Japan
| | - Tetsuaki Hirase
- />Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565 Japan
| | - Edward W Holmes
- />Sanford Consortium for Regenerative Medicine, San Diego, CA USA
| | - Takayuki Morisaki
- />Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565 Japan
- />Department of Molecular Pathophysiology, Osaka University Graduate School of Pharmaceutical Sciences, Suita, Osaka, Japan
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