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Hajka D, Budziak B, Rakus D, Gizak A. Neuronal extracellular vesicles influence the expression, degradation and oligomeric state of fructose 1,6-bisphosphatase 2 in astrocytes affecting their glycolytic capacity. Sci Rep 2024; 14:20932. [PMID: 39251668 PMCID: PMC11385182 DOI: 10.1038/s41598-024-71560-7] [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: 05/13/2024] [Accepted: 08/29/2024] [Indexed: 09/11/2024] Open
Abstract
Fructose 1,6-bisphosphatase 2 (Fbp2) is a regulatory enzyme of gluco- and glyconeogenesis which, in the course of evolution, acquired non-catalytic functions. Fbp2 promotes cell survival during calcium stress, regulates glycolysis via inhibition of Hif-1α activity, and is indispensable for the formation of long-term potentiation in hippocampus. In hippocampal astrocytes, the amount of Fbp2 protein is reduced by signals delivered in neuronal extracellular vesicles (NEVs) through an unknown mechanism. The physiological role of Fbp2 (determined by its subcellular localization/interactions) depends on its oligomeric state and thus, we asked whether the cargo of NEVs is sufficient to change also the ratio of Fbp2 dimer/tetramer and, consequently, influence astrocyte basal metabolism. We found that the NEVs cargo reduced the Fbp2 mRNA level, stimulated the enzyme degradation and affected the cellular titers of different oligomeric forms of Fbp2. This was accompanied with increased glucose uptake and lactate release by astrocytes. Our results revealed that neuronal signals delivered to astrocytes in NEVs provide the necessary balance between enzymatic and non-enzymatic functions of Fbp2, influencing not only its amount but also subcellular localization. This may allow for the metabolic adjustments and ensure protection of mitochondrial membrane potential during the neuronal activity-related increase in astrocytic [Ca2+].
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Affiliation(s)
- Daria Hajka
- Department of Molecular Physiology and Neurobiology, University of Wrocław, 50-335, Wrocław, Poland
- Łukasiewicz Research Network - PORT Polish Center for Technology Development, 54-006, Wrocław, Poland
| | - Bartosz Budziak
- Department of Molecular Physiology and Neurobiology, University of Wrocław, 50-335, Wrocław, Poland
| | - Dariusz Rakus
- Department of Molecular Physiology and Neurobiology, University of Wrocław, 50-335, Wrocław, Poland
| | - Agnieszka Gizak
- Department of Molecular Physiology and Neurobiology, University of Wrocław, 50-335, Wrocław, Poland.
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Pietras Ł, Stefanik E, Rakus D, Gizak A. FBP2–A New Player in Regulation of Motility of Mitochondria and Stability of Microtubules in Cardiomyocytes. Cells 2022; 11:cells11101710. [PMID: 35626746 PMCID: PMC9139521 DOI: 10.3390/cells11101710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 02/01/2023] Open
Abstract
Recently, we have shown that the physiological roles of a multifunctional protein fructose 1,6-bisphosphatase 2 (FBP2, also called muscle FBP) depend on the oligomeric state of the protein. Here, we present several lines of evidence that in HL-1 cardiomyocytes, a forced, chemically induced reduction in the FBP2 dimer-tetramer ratio that imitates AMP and NAD+ action and restricts FBP2-mitochondria interaction, results in an increase in Tau phosphorylation, augmentation of FBP2-Tau and FBP2-MAP1B interactions, disturbance of tubulin network, marked reduction in the speed of mitochondrial trafficking and increase in mitophagy. These results not only highlight the significance of oligomerization for the regulation of FBP2 physiological role in the cell, but they also demonstrate a novel, important cellular function of this multitasking protein—a function that might be crucial for processes that take place during physiological and pathological cardiac remodeling, and during the onset of diseases which are rooted in the destabilization of MT and/or mitochondrial network dynamics.
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Wang L, Wang J, Shen Y, Zheng Z, Sun J. Fructose-1,6-Bisphosphatase 2 Inhibits Oral Squamous Cell Carcinoma Tumorigenesis and Glucose Metabolism via Downregulation of c-Myc. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:6766787. [PMID: 35571245 PMCID: PMC9106462 DOI: 10.1155/2022/6766787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 02/23/2022] [Accepted: 04/02/2022] [Indexed: 12/13/2022]
Abstract
Background Fructose-1,6-bisphosphatase 2 (FBP2), known as a rate-limiting enzyme in gluconeogenesis, is a tumor suppressor downregulated in various cancers. However, the role of FBP2 in oral squamous cell carcinoma (OSCC) remains largely unclear. Methods The level of FBP2 in OSCC tissues and matched adjacent normal tissues was determined by western blot and RT-qPCR assays. In addition, analysis of FBP2 function in OSCC cells was assessed using both gain-of-function and loss-of-function studies. Results In this study, we found that the expression of FBP2 was remarkably downregulated in OSCC tissues and OSCC cells. Overexpression of FBP2 suppressed the viability, proliferation, migration, and glycolysis of OSCC cells, whereas FBP2 knockdown exhibited the opposite results. Moreover, downregulation of FBP2 promoted the growth and glycolysis of OSCC cells in nude mice in a xenograft model. Specifically, FBP2 colocalizes with the c-Myc transcription factor in the nucleus. Significantly, inhibitory effects of FBP2 overexpression on the viability, proliferation, migration, and glycolysis of OSCC cells were reversed by c-Myc overexpression. Conclusion Collectively, FBP2 could suppress the proliferation, migration and glycolysis in OSCC cells through downregulation of c-Myc. Our study revealed a FBP2-c-Myc signaling axis that regulates OSCC glycolysis and may provide a potential intervention strategy for OSCC treatment.
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Affiliation(s)
- Liang Wang
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Jinbing Wang
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Yi Shen
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Zhiwei Zheng
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Jian Sun
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
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Gizak A, Diegmann S, Dreha-Kulaczewski S, Wiśniewski J, Duda P, Ohlenbusch A, Huppke B, Henneke M, Höhne W, Altmüller J, Thiele H, Nürnberg P, Rakus D, Gärtner J, Huppke P. A novel remitting leukodystrophy associated with a variant in FBP2. Brain Commun 2021; 3:fcab036. [PMID: 33977262 PMCID: PMC8097510 DOI: 10.1093/braincomms/fcab036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 01/16/2021] [Accepted: 01/18/2021] [Indexed: 11/14/2022] Open
Abstract
Leukodystrophies are genetic disorders of cerebral white matter that almost exclusively have a progressive disease course. We became aware of three members of a family with a disorder characterized by a sudden loss of all previously acquired abilities around 1 year of age followed by almost complete recovery within 2 years. Cerebral MRI and myelin sensitive imaging showed a pronounced demyelination that progressed for several months despite signs of clinical improvement and was followed by remyelination. Exome sequencing did not-identify any mutations in known leukodystrophy genes but revealed a heterozygous variant in the FBP2 gene, c.343G>A, p. Val115Met, shared by the affected family members. Cerebral MRI of other family members demonstrated similar white matter abnormalities in all carriers of the variant in FBP2. The FBP2 gene codes for muscle fructose 1,6-bisphosphatase, an enzyme involved in gluconeogenesis that is highly expressed in brain tissue. Biochemical analysis showed that the variant has a dominant negative effect on enzymatic activity, substrate affinity, cooperativity and thermal stability. Moreover, it also affects the non-canonical functions of muscle fructose 1,6-bisphosphatase involved in mitochondrial protection and regulation of several nuclear processes. In patients’ fibroblasts, muscle fructose 1,6-bisphosphatase shows no colocalization with mitochondria and nuclei leading to increased reactive oxygen species production and a disturbed mitochondrial network. In conclusion, the results of this study indicate that the variant in FBP2 disturbs cerebral energy metabolism and is associated with a novel remitting leukodystrophy.
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Affiliation(s)
- Agnieszka Gizak
- Department of Molecular Physiology and Neurobiology, University of Wrocław, 50-335 Wrocław, Poland
| | - Susann Diegmann
- Department of Pediatrics and Pediatric Neurology, University Medical Center Göttingen, Georg August University, 37075 Göttingen, Germany
| | - Steffi Dreha-Kulaczewski
- Department of Pediatrics and Pediatric Neurology, University Medical Center Göttingen, Georg August University, 37075 Göttingen, Germany
| | - Janusz Wiśniewski
- Department of Molecular Physiology and Neurobiology, University of Wrocław, 50-335 Wrocław, Poland
| | - Przemysław Duda
- Department of Molecular Physiology and Neurobiology, University of Wrocław, 50-335 Wrocław, Poland
| | - Andreas Ohlenbusch
- Department of Pediatrics and Pediatric Neurology, University Medical Center Göttingen, Georg August University, 37075 Göttingen, Germany
| | - Brenda Huppke
- Department of Pediatrics and Pediatric Neurology, University Medical Center Göttingen, Georg August University, 37075 Göttingen, Germany.,Department of Neuropediatrics, Jena University Hospital, 07747 Jena, Germany
| | - Marco Henneke
- Department of Pediatrics and Pediatric Neurology, University Medical Center Göttingen, Georg August University, 37075 Göttingen, Germany
| | - Wolfgang Höhne
- Cologne Center for Genomics (CCG) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
| | - Janine Altmüller
- Cologne Center for Genomics (CCG) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
| | - Holger Thiele
- Cologne Center for Genomics (CCG) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
| | - Peter Nürnberg
- Cologne Center for Genomics (CCG) and Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
| | - Dariusz Rakus
- Department of Molecular Physiology and Neurobiology, University of Wrocław, 50-335 Wrocław, Poland
| | - Jutta Gärtner
- Department of Pediatrics and Pediatric Neurology, University Medical Center Göttingen, Georg August University, 37075 Göttingen, Germany
| | - Peter Huppke
- Department of Pediatrics and Pediatric Neurology, University Medical Center Göttingen, Georg August University, 37075 Göttingen, Germany.,Department of Neuropediatrics, Jena University Hospital, 07747 Jena, Germany
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Hajka D, Duda P, Wójcicka O, Drulis-Fajdasz D, Rakus D, Gizak A. Expression of Fbp2, a Newly Discovered Constituent of Memory Formation Mechanisms, Is Regulated by Astrocyte-Neuron Crosstalk. Int J Mol Sci 2020; 21:ijms21186903. [PMID: 32962293 PMCID: PMC7555702 DOI: 10.3390/ijms21186903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/16/2020] [Accepted: 09/18/2020] [Indexed: 12/13/2022] Open
Abstract
Fbp2 (muscle isozyme of fructose 1,6-bisphosphatase) is a glyconeogenesis-regulating enzyme and a multifunctional protein indispensable for long-term potentiation (LTP) formation in the hippocampus. Here, we present evidence that expression of Fbp2 in murine hippocampal cell cultures is regulated by crosstalk between neurons and astrocytes. Co-culturing of the two cell types results in a decrease in Fbp2 expression in astrocytes, and its simultaneous increase in neurons, as compared to monocultures. These changes are regulated by paracrine signaling using extracellular vesicle (EV)-packed factors released to the culture medium. It is well accepted that astrocyte-neuron metabolic crosstalk plays a crucial role in shaping neuronal function, and recently we have suggested that Fbp2 is a hub linking neuronal signaling with redox and/or energetic state of brain during the formation of memory traces. Thus, our present results emphasize the importance of astrocyte-neuron crosstalk in the regulation of the cells' metabolism and synaptic plasticity, and bring us one step closer to a mechanistic understanding of the role of Fbp2 in these processes.
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Cell-to-cell lactate shuttle operates in heart and is important in age-related heart failure. Aging (Albany NY) 2020; 12:3388-3406. [PMID: 32035422 PMCID: PMC7066931 DOI: 10.18632/aging.102818] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 01/27/2020] [Indexed: 01/02/2023]
Abstract
Recent studies have revealed a resemblance of a HIF-regulated heart and brain glycolytic profiles prompting the hypothesis that the classical cell-to-cell lactate shuttle observed between astrocytes and neurons operates also in heart - between cardiac fibroblasts and cardiomyocytes. Here, we demonstrate that co-culturing of cardiomyocytes with cardiac fibroblasts leads to orchestrated changes in expression and/or localization pattern of glucose metabolism enzymes and lactate transport proteins in both cell types. These changes are regulated by paracrine signaling using microvesicle-packed and soluble factors released to the culture medium and, taken together, they concur with the cardiac lactate shuttle hypothesis. The results presented here show that similarity of heart and brain proteomes demonstrated earlier extend to physiological level and provide a theoretical rationale for designing novel therapeutic strategies for treatment of cardiomyopathies resulting from disruption of the maturation of cardiac metabolic pathways, and of heart failure associated with metabolic complications and age-related heart failure linked with extracellular matrix deposition and hypoxia.
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Gizak A, Duda P, Wisniewski J, Rakus D. Fructose-1,6-bisphosphatase: From a glucose metabolism enzyme to multifaceted regulator of a cell fate. Adv Biol Regul 2019; 72:41-50. [PMID: 30871972 DOI: 10.1016/j.jbior.2019.03.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 03/04/2019] [Accepted: 03/05/2019] [Indexed: 06/09/2023]
Abstract
Fructose-1,6-bisphosphatase (FBPase) is one of the ancient, evolutionarily conserved enzymes of carbohydrate metabolism. It has been described for a first time in 1943, however, for the next half a century mostly kinetic and structural parameters of animal FBPases have been studied. Discovery of ubiquitous expression of the muscle isozyme of FBPase, thus far considered to merely regulate glycogen synthesis from carbohydrate precursors, and its nuclear localisation in several cell types has risen new interest in the protein, resulting in numerous publications revealing complex functions/properties of FBPase. This review summarises the current knowledge of FBPase in animal cells providing evidence that the enzyme merits the name of moonlighting protein.
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Affiliation(s)
- Agnieszka Gizak
- Department of Molecular Physiology and Neurobiology, Wroclaw University, Wroclaw, Poland
| | - Przemyslaw Duda
- Department of Molecular Physiology and Neurobiology, Wroclaw University, Wroclaw, Poland
| | - Janusz Wisniewski
- Department of Molecular Physiology and Neurobiology, Wroclaw University, Wroclaw, Poland
| | - Dariusz Rakus
- Department of Molecular Physiology and Neurobiology, Wroclaw University, Wroclaw, Poland.
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Wang Z, Dong C. Gluconeogenesis in Cancer: Function and Regulation of PEPCK, FBPase, and G6Pase. Trends Cancer 2018; 5:30-45. [PMID: 30616754 DOI: 10.1016/j.trecan.2018.11.003] [Citation(s) in RCA: 163] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 11/11/2018] [Accepted: 11/12/2018] [Indexed: 01/19/2023]
Abstract
Cancer cells display a high rate of glycolysis in the presence of oxygen to promote proliferation. Gluconeogenesis, the reverse pathway of glycolysis, can antagonize aerobic glycolysis in cancer via three key enzymes - phosphoenolpyruvate carboxykinase (PEPCK), fructose-1,6-bisphosphatase (FBPase), and glucose-6-phosphatase (G6Pase). Recent studies have revealed that, in addition to metabolic regulation, these enzymes also play a role in signaling, proliferation, and the cancer stem cell (CSC) tumor phenotype. Multifaceted regulation of PEPCK, FBPase, and G6Pase through transcription, epigenetics, post-translational modification, and enzymatic activity is observed in different cancers. We review here the function and regulation of key gluconeogenic enzymes and new therapeutic opportunities.
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Affiliation(s)
- Zhanyu Wang
- Department of Pathology and Pathophysiology, and Department of Surgical Oncology (Breast Center) of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Zhejiang Key Laboratory for Disease Proteomics, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Chenfang Dong
- Department of Pathology and Pathophysiology, and Department of Surgical Oncology (Breast Center) of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China; Zhejiang Key Laboratory for Disease Proteomics, Zhejiang University School of Medicine, Hangzhou 310058, China.
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Liu GM, Zhang YM. Targeting FBPase is an emerging novel approach for cancer therapy. Cancer Cell Int 2018; 18:36. [PMID: 29556139 PMCID: PMC5845355 DOI: 10.1186/s12935-018-0533-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/05/2018] [Indexed: 02/06/2023] Open
Abstract
Cancer is a leading cause of death in both developed and developing countries. Metabolic reprogramming is an emerging hallmark of cancer. Glucose homeostasis is reciprocally controlled by the catabolic glycolysis and anabolic gluconeogenesis pathways. Previous studies have mainly focused on catabolic glycolysis, but recently, FBPase, a rate-limiting enzyme in gluconeogenesis, was found to play critical roles in tumour initiation and progression in several cancer types. Here, we review recent ideas and discoveries that illustrate the clinical significance of FBPase expression in various cancers, the mechanism through which FBPase influences cancer, and the mechanism of FBPase silencing. Furthermore, we summarize some of the drugs targeting FBPase and discuss their potential use in clinical applications and the problems that remain unsolved.
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Affiliation(s)
- Gao-Min Liu
- Department of Hepatobiliary Surgery, Meizhou People's Hospital, No. 38 Huangtang Road, Meizhou, 514000 China
| | - Yao-Ming Zhang
- Department of Hepatobiliary Surgery, Meizhou People's Hospital, No. 38 Huangtang Road, Meizhou, 514000 China
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Wiśniewski J, Piróg M, Hołubowicz R, Dobryszycki P, McCubrey JA, Rakus D, Gizak A. Dimeric and tetrameric forms of muscle fructose-1,6-bisphosphatase play different roles in the cell. Oncotarget 2017; 8:115420-115433. [PMID: 29383170 PMCID: PMC5777782 DOI: 10.18632/oncotarget.23271] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 12/05/2017] [Indexed: 12/19/2022] Open
Abstract
Muscle fructose 1,6-bisphosphatase (FBP2), besides being a regulatory enzyme of glyconeogenesis also protects mitochondria against calcium stress and plays a key role in regulation of the cell cycle, promoting cardiomyocytes survival. However, in cancer cells, FBP2 acts as an anti-oncogenic/anti-proliferative protein. Here, we show that the physiological function of FBP2 depends both on its level of expression in a cell as well as its oligomerization state. Animal fructose-1,6-bisphosphatases are thought to function as tetramers. We present evidence that FBP2 exists in an equilibrium between tetramers and dimers. The dimeric form is fully active and insensitive to AMP, the main allosteric inhibitor of FBP2. Tetramerization induces the sensitivity of the protein to AMP, but it requires the presence of a hydrophobic central region in which leucine 190 plays a crucial role. Only the tetrameric form of FBP2 is retained in cardiomyocyte cell nucleus whereas only the dimeric form associates with mitochondria and protects them against stress stimuli, such as elevated calcium and H2O2 level. Remarkably, in hypoxic conditions, which are typical for many cancers, FBP2 ceases to interact with mitochondria and loses its pro-survival potential. Our results throw new light on the basis of the diverse role of FBP2 in cells.
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Affiliation(s)
- Janusz Wiśniewski
- Department of Molecular Physiology and Neurobiology, University of Wroclaw, Wroclaw 50-335, Poland
| | - Michał Piróg
- Department of Molecular Physiology and Neurobiology, University of Wroclaw, Wroclaw 50-335, Poland
| | - Rafał Hołubowicz
- Department of Biochemistry, Wroclaw University of Science and Technology, Wroclaw 50-370, Poland
| | - Piotr Dobryszycki
- Department of Biochemistry, Wroclaw University of Science and Technology, Wroclaw 50-370, Poland
| | - James A McCubrey
- Department of Microbiology and Immunology, Brody School of Medicine at East Carolina University, Greenville, NC, USA
| | - Dariusz Rakus
- Department of Molecular Physiology and Neurobiology, University of Wroclaw, Wroclaw 50-335, Poland
| | - Agnieszka Gizak
- Department of Molecular Physiology and Neurobiology, University of Wroclaw, Wroclaw 50-335, Poland
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Liu Y, Jiang Y, Wang N, Jin Q, Ji F, Zhong C, Zhang Z, Yang J, Ye X, Chen T. Invalidation of mitophagy by FBP1-mediated repression promotes apoptosis in breast cancer. Tumour Biol 2017; 39:1010428317708779. [PMID: 28653874 DOI: 10.1177/1010428317708779] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Fructose-1,6-bisphosphatase 1, a rate-limiting enzyme in gluconeogenesis, was recently shown to be a tumor suppressor. However, the functions of fructose-1,6-bisphosphatase 1 in the regulation of mitophagy and apoptosis remain unknown. Here, we investigated the effects of fructose-1,6-bisphosphatase 1 on mitophagy and apoptosis as well as their underlying mechanisms in breast cancer cells. In this work, the messenger RNA and protein expression of various molecules were determined by quantitative realtime polymerase chain reaction and western blot, respectively. Gene-expression correlations were obtained from The Cancer Genome Atlas Breast Cancer database and analyzed using cBioPortal. The levels of cellular reactive oxygen species and apoptotic index were detected by flow cytometry. The mitochondrial membrane potentials were assessed with a JC-1 fluorescent sensor. Subcellular structures were observed under a transmission electron microscope. The intracellular distribution of translocase of outer membrane 20 was detected by immunofluorescence staining. Protein-protein interactions were analyzed by immunoprecipitation. Our results indicated that fructose-1,6-bisphosphatase 1 expression was negatively correlated with autophagy level in breast cancer. Fructose-1,6-bisphosphatase 1 restrained autophagy activity by increasing the level of p62 and decreasing the levels of LC3 and Beclin 1. Additionally, fructose-1,6-bisphosphatase 1 promoted cell apoptosis by upregulating the levels of intracellular ROS and expression of pro-apoptotic proteins such as cleaved PARP, cleaved Caspase 3, and Bax and downregulating the levels of anti-apoptotic proteins such as PARP, Caspase 3, and Bcl-2. Finally, fructose-1,6-bisphosphatase 1 limited the efficient removal of diseased mitochondria and reduced the messenger RNA and protein expressions of HIF-1α, BNIP3L/NIX, and BNIP3. More importantly, fructose-1,6-bisphosphatase 1 facilitated co-action between Bcl-2 and Beclin 1, which may be important in the mechanism of fructose-1,6-bisphosphatase 1-mediated mitophagy inhibition. In summary, loss of mitophagy by fructose-1,6-bisphosphatase 1-mediated repression promotes apoptosis in breast cancer.
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Affiliation(s)
- Yifeng Liu
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Yulin Jiang
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Nian Wang
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Qianni Jin
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Feihu Ji
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Changli Zhong
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Zhiqiang Zhang
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Junhong Yang
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Xiangsen Ye
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
| | - Tingmei Chen
- Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, P.R. China
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Barciszewski J, Wisniewski J, Kolodziejczyk R, Jaskolski M, Rakus D, Dzugaj A. T-to-R switch of muscle fructose-1,6-bisphosphatase involves fundamental changes of secondary and quaternary structure. Acta Crystallogr D Struct Biol 2016; 72:536-50. [PMID: 27050133 PMCID: PMC4822563 DOI: 10.1107/s2059798316001765] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 01/28/2016] [Indexed: 11/11/2022] Open
Abstract
Fructose-1,6-bisphosphatase (FBPase) catalyzes the hydrolysis of fructose 1,6-bisphosphate to fructose 6-phosphate and is a key enzyme of gluconeogenesis and glyconeogenesis and, more generally, of the control of energy metabolism and glucose homeostasis. Vertebrates, and notably Homo sapiens, express two FBPase isoforms. The liver isozyme is expressed mainly in gluconeogenic organs, where it functions as a regulator of glucose synthesis. The muscle isoform is expressed in all cells, and recent studies have demonstrated that its role goes far beyond the enzymatic function, as it can interact with various nuclear and mitochondrial proteins. Even in its enzymatic function, the muscle enzyme is different from the liver isoform, as it is 100-fold more susceptible to allosteric inhibition by AMP and this effect can be abrogated by complex formation with aldolase. All FBPases are homotetramers composed of two intimate dimers: the upper dimer and the lower dimer. They oscillate between two conformational states: the inactive T form when in complex with AMP, and the active R form. Parenthetically, it is noted that bacterial FBPases behave somewhat differently, and in the absence of allosteric activators exist in a tetramer-dimer equilibrium even at relatively high concentrations. [Hines et al. (2007), J. Biol. Chem. 282, 11696-11704]. The T-to-R transition is correlated with the conformation of the key loop L2, which in the T form becomes `disengaged' and unable to participate in the catalytic mechanism. The T states of both isoforms are very similar, with a small twist of the upper dimer relative to the lower dimer. It is shown that at variance with the well studied R form of the liver enzyme, which is flat, the R form of the muscle enzyme is diametrically different, with a perpendicular orientation of the upper and lower dimers. The crystal structure of the muscle-isozyme R form shows that in this arrangement of the tetramer completely new protein surfaces are exposed that are most likely targets for the interactions with various cellular and enzymatic partners. The cruciform R structure is stabilized by a novel `leucine lock', which prevents the key residue, Asp187, from locking loop L2 in the disengaged conformation. In addition, the crystal structures of muscle FBPase in the T conformation with and without AMP strongly suggest that the T-to-R transition is a discrete jump rather than a shift of an equilibrium smooth transition through multiple intermediate states. Finally, using snapshots from three crystal structures of human muscle FBPase, it is conclusively demonstrated that the AMP-binding event is correlated with a β→α transition at the N-terminus of the protein and with the formation of a new helical structure.
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Affiliation(s)
- Jakub Barciszewski
- Center for Biocrystallographic Research, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
| | - Janusz Wisniewski
- Department of Animal Molecular Physiology, Wrocław University, Wrocław, Poland
| | - Robert Kolodziejczyk
- Department of Crystallography, Faculty of Chemistry, A. Mickiewicz University, Poznan, Poland
| | - Mariusz Jaskolski
- Center for Biocrystallographic Research, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland
- Department of Crystallography, Faculty of Chemistry, A. Mickiewicz University, Poznan, Poland
| | - Dariusz Rakus
- Department of Animal Molecular Physiology, Wrocław University, Wrocław, Poland
| | - Andrzej Dzugaj
- Department of Genetics, Wrocław University, Wrocław, Poland
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The Genetic Architecture of Hearing Impairment in Mice: Evidence for Frequency-Specific Genetic Determinants. G3-GENES GENOMES GENETICS 2015; 5:2329-39. [PMID: 26342000 PMCID: PMC4632053 DOI: 10.1534/g3.115.021592] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Genome-wide association studies (GWAS) have been successfully applied in humans for the study of many complex phenotypes. However, identification of the genetic determinants of hearing in adults has been hampered, in part, by the relative inability to control for environmental factors that might affect hearing throughout the lifetime, as well as a large degree of phenotypic heterogeneity. These and other factors have limited the number of large-scale studies performed in humans that have identified candidate genes that contribute to the etiology of this complex trait. To address these limitations, we performed a GWAS analysis using a set of inbred mouse strains from the Hybrid Mouse Diversity Panel. Among 99 strains characterized, we observed approximately two-fold to five-fold variation in hearing at six different frequencies, which are differentiated biologically from each other by the location in the cochlea where each frequency is registered. Among all frequencies tested, we identified a total of nine significant loci, several of which contained promising candidate genes for follow-up study. Taken together, our results indicate the existence of both genes that affect global cochlear function, as well as anatomical- and frequency-specific genes, and further demonstrate the complex nature of mammalian hearing variation.
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14
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Mamczur P, Borsuk B, Paszko J, Sas Z, Mozrzymas J, Wiśniewski JR, Gizak A, Rakus D. Astrocyte-neuron crosstalk regulates the expression and subcellular localization of carbohydrate metabolism enzymes. Glia 2014; 63:328-40. [DOI: 10.1002/glia.22753] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 09/08/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Piotr Mamczur
- Department of Animal Molecular Physiology; Institute of Experimental Biology; Wrocław University; Cybulskiego 30, 50-205 Wrocław Poland
| | - Borys Borsuk
- Department of Animal Molecular Physiology; Institute of Experimental Biology; Wrocław University; Cybulskiego 30, 50-205 Wrocław Poland
| | - Jadwiga Paszko
- Department of Animal Molecular Physiology; Institute of Experimental Biology; Wrocław University; Cybulskiego 30, 50-205 Wrocław Poland
| | - Zuzanna Sas
- Department of Animal Molecular Physiology; Institute of Experimental Biology; Wrocław University; Cybulskiego 30, 50-205 Wrocław Poland
| | - Jerzy Mozrzymas
- Department of Animal Molecular Physiology; Institute of Experimental Biology; Wrocław University; Cybulskiego 30, 50-205 Wrocław Poland
- Laboratory of Neuroscience; Department of Biophysics; Wrocław Medical University, Chałubińskiego; 3, 50-368 Wrocław Poland
| | - Jacek R. Wiśniewski
- Department of Proteomics and Signal Transduction; Max-Planck-Institute of Biochemistry; Am Klopferspitz 18 D-82152 Martinsried Germany
| | - Agnieszka Gizak
- Department of Animal Molecular Physiology; Institute of Experimental Biology; Wrocław University; Cybulskiego 30, 50-205 Wrocław Poland
| | - Dariusz Rakus
- Department of Animal Molecular Physiology; Institute of Experimental Biology; Wrocław University; Cybulskiego 30, 50-205 Wrocław Poland
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15
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Changes in quaternary structure of muscle fructose-1,6-bisphosphatase regulate affinity of the enzyme to mitochondria. Int J Biochem Cell Biol 2014; 48:55-9. [PMID: 24412565 DOI: 10.1016/j.biocel.2013.12.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 12/16/2013] [Accepted: 12/24/2013] [Indexed: 11/23/2022]
Abstract
Muscle fructose-1,6-bisphosphatase (FBP2), a regulatory enzyme of glyconeogenesis, binds to mitochondria where it interacts with proteins involved in regulation of energy homeostasis. Here, we show that the quaternary structure of FBP2 plays a crucial role in this interaction, and that the AMP-driven transition of the FBP2 subunit arrangement from active to inactive precludes its association with the mitochondria. Moreover, we demonstrate that truncation of the evolutionarily conserved N-terminal residues of FBP2 results in a loss of its mitochondria-protective functions. This strengthens the recently raised hypothesis that FBP2 evolved as a regulator not only for glycogen storage but also for mitochondrial function in contracting muscle.
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16
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Adeva M, González-Lucán M, Seco M, Donapetry C. Enzymes involved in l-lactate metabolism in humans. Mitochondrion 2013; 13:615-29. [DOI: 10.1016/j.mito.2013.08.011] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 07/29/2013] [Accepted: 08/30/2013] [Indexed: 12/20/2022]
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17
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Nuclear localization of aldolase A correlates with cell proliferation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2013; 1833:2812-2822. [PMID: 23886627 DOI: 10.1016/j.bbamcr.2013.07.013] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 06/25/2013] [Accepted: 07/15/2013] [Indexed: 11/20/2022]
Abstract
Muscle fructose 1,6-bisphosphate aldolase (ALDA) is a glycolytic enzyme which may localize both in nuclei and cytoplasm of cells, however its role in the nuclei is unclear. Here, we demonstrate the links between subcellular localization of ALDA and the cell cycle progression as well as the availability of energetic substrates. Results of our studies indicate that nuclear localization of ALDA correlates with the proliferative activity of the cells and with the expression of Ki-67, a marker of proliferation, both in the KLN-205 (mouse lung cancer cells) and human squamous cell lung cancer cells (hSCC). Chemically-induced block of cell cycle entry in S phase and the inhibition of transcription stimulate removal of ALDA from cells nuclei suggesting that nuclear ALDA is involved in cells proliferation. On the other hand, subcellular distribution of the enzyme also depends on the stress and pro-survival signals mediated by the Akt and the p38 pathways and, in non-proliferating cells, on the availability of glucose and lactate. The results presented here point to ALDA as a factor involved in the regulation of cells proliferation.
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18
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Taatjes DJ, Roth J. The Histochemistry and Cell Biology compendium: a review of 2012. Histochem Cell Biol 2013; 139:815-46. [PMID: 23665922 DOI: 10.1007/s00418-013-1098-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/29/2013] [Indexed: 01/27/2023]
Abstract
The year 2012 was another exciting year for Histochemistry and Cell Biology. Innovations in immunohistochemical techniques and microscopy-based imaging have provided the means for advances in the field of cell biology. Over 130 manuscripts were published in the journal during 2012, representing methodological advancements, pathobiology of disease, and cell and tissue biology. This annual review of the manuscripts published in the previous year in Histochemistry and Cell Biology serves as an abbreviated reference for the readership to quickly peruse and discern trends in the field over the past year. The review has been broadly divided into multiple sections encompassing topics such as method advancements, subcellular components, extracellular matrix, and organ systems. We hope that the creation of this subdivision will serve to guide the reader to a specific topic of interest, while simultaneously providing a concise and easily accessible encapsulation of other topics in the broad area of Histochemistry and Cell Biology.
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Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Microscopy Imaging Center, University of Vermont College of Medicine, 89 Beaumont Avenue, Burlington, VT 05405, USA.
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19
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Gizak A, Mazurek J, Wozniak M, Maciaszczyk-Dziubinska E, Rakus D. Destabilization of fructose 1,6-bisphosphatase-Z-line interactions is a mechanism of glyconeogenesis down-regulation in vivo. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1833:622-8. [PMID: 23228565 DOI: 10.1016/j.bbamcr.2012.11.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 11/28/2012] [Accepted: 11/30/2012] [Indexed: 11/28/2022]
Abstract
Although it is well known that insulin controls the synthesis of glycogen from non-carbohydrates by down-regulating expression of several glyconeogenic enzymes, a mechanism of short-term inhibition of glyconeogenesis remains unknown. In recent years, we have shown that in skeletal muscle, fructose 1,6-bisphosphatase (FBPase) is a part of the hypothetical glyconeogenic complex located on sarcomeric Z-line. Here, we show that inhibition of glycogen synthase kinase-3 causes disruption of the FBPase-Z-line interactions and reduction of muscle glycogen content in vivo. The normal, striated pattern of muscle FBPase localization is also disturbed by insulin treatment but preserved when insulin is applied together with Akt inhibitor. We suggest that destabilization of FBPase-Z-line interaction is a universal cellular mechanism of glyconeogenesis down-regulation, allowing for preferential utilization of glucose for insulin-stimulated muscle glycogen synthesis.
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Affiliation(s)
- Agnieszka Gizak
- Department of Animal Molecular Physiology, Wroclaw University, Cybulskiego 30, 50-205 Wroclaw, Poland
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20
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Qattan AT, Radulovic M, Crawford M, Godovac-Zimmermann J. Spatial distribution of cellular function: the partitioning of proteins between mitochondria and the nucleus in MCF7 breast cancer cells. J Proteome Res 2012; 11:6080-101. [PMID: 23051583 PMCID: PMC4261608 DOI: 10.1021/pr300736v] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Concurrent proteomics analysis of the nuclei and mitochondria of MCF7 breast cancer cells identified 985 proteins (40% of all detected proteins) present in both organelles. Numerous proteins from all five complexes involved in oxidative phosphorylation (e.g., NDUFA5, NDUFB10, NDUFS1, NDUF2, SDHA, UQRB, UQRC2, UQCRH, COX5A, COX5B, MT-CO2, ATP5A1, ATP5B, ATP5H, etc.), from the TCA-cycle (DLST, IDH2, IDH3A, OGDH, SUCLAG2, etc.), and from glycolysis (ALDOA, ENO1, FBP1, GPI, PGK1, TALDO1, etc.) were distributed to both the nucleus and mitochondria. In contrast, proteins involved in nuclear/mitochondrial RNA processing/translation and Ras/Rab signaling showed different partitioning patterns. The identity of the OxPhos, TCA-cycle, and glycolysis proteins distributed to both the nucleus and mitochondria provides evidence for spatio-functional integration of these processes over the two different subcellular organelles. We suggest that there are unrecognized aspects of functional coordination between the nucleus and mitochondria, that integration of core functional processes via wide subcellular distribution of constituent proteins is a common characteristic of cells, and that subcellular spatial integration of function may be a vital aspect of cancer.
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Affiliation(s)
- Amal T. Qattan
- Proteomics and Molecular Cell Dynamics, Division of Medicine, School of Life and Medical Sciences, University College London, Royal Free Campus, Rowland Hill Street NW3 2PF, United Kingdom
| | - Marko Radulovic
- Proteomics and Molecular Cell Dynamics, Division of Medicine, School of Life and Medical Sciences, University College London, Royal Free Campus, Rowland Hill Street NW3 2PF, United Kingdom
| | - Mark Crawford
- Proteomics and Molecular Cell Dynamics, Division of Medicine, School of Life and Medical Sciences, University College London, Royal Free Campus, Rowland Hill Street NW3 2PF, United Kingdom
| | - Jasminka Godovac-Zimmermann
- Proteomics and Molecular Cell Dynamics, Division of Medicine, School of Life and Medical Sciences, University College London, Royal Free Campus, Rowland Hill Street NW3 2PF, United Kingdom
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21
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Current world literature. Curr Opin Endocrinol Diabetes Obes 2012; 19:429-34. [PMID: 22931856 DOI: 10.1097/med.0b013e328358c698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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22
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Gizak A, Sok AJ, Lipinska A, Zarzycki M, Rakus D, Dzugaj A. A comparative study on the sensitivity of Cyprinus carpio muscle and liver FBPase toward AMP and calcium. Comp Biochem Physiol B Biochem Mol Biol 2012; 162:51-5. [PMID: 22495200 DOI: 10.1016/j.cbpb.2012.03.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2011] [Revised: 03/23/2012] [Accepted: 03/23/2012] [Indexed: 11/30/2022]
Abstract
The activity of fructose-1,6-bisphosphatase (FBPase; EC 3.1.3.11) isozymes is influenced by AMP, Ca2+ and by reversible interactions with subcellular structures. In contrast to mammalian and avian isozymes, the kinetic properties of FBPases from ectothermal vertebrates are not fully described. To get some insight into mechanism of glycogen resynthesis in ectothermal vertebrates we examined the features of FBPases isolated from Cyprinus carpio skeletal muscle and liver. To investigate the evolutionary origin of the sensitivity of FBPase to effectors, we performed a phylogenetic analysis of known animal amino acids sequences of the enzyme. Based on our findings, we hypothesize that the high, mammalian-like, sensitivity of FBPase to Ca2+ is not essential for controlling the stability of glyconeogenic complex in striated muscles, instead it ensures the precise regulation of mitochondrial metabolism during prolonged Ca2+ elevation in contracting muscle fibers. Comparison of the kinetic properties of vertebrate and insect FBPases suggests that the high sensitivity of muscle isozyme to inhibitors has arisen as an adaptation enabling coordination of energy metabolism in warm-blooded animals.
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Affiliation(s)
- Agnieszka Gizak
- Department of Animal Molecular Physiology, Wroclaw University, Cybulskiego 30, 50-205 Wroclaw, Poland
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