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Medici V, Sarode GV, Napoli E, Song GY, Shibata NM, Guimarães AO, Mordaunt CE, Kieffer DA, Mazi TA, Czlonkowska A, Litwin T, LaSalle JM, Giulivi C. mtDNA depletion-like syndrome in Wilson disease. Liver Int 2020; 40:2776-2787. [PMID: 32996699 PMCID: PMC8079140 DOI: 10.1111/liv.14646] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/13/2020] [Accepted: 08/14/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND AIMS Wilson disease (WD) is caused by mutations in the copper transporter ATP7B, with its main pathology attributed to copper-mediated oxidative damage. The limited therapeutic effect of copper chelators and the early occurrence of mitochondrial deficits, however, undermine the prevalence of this mechanism. METHODS We characterized mitochondrial DNA copy number and mutations as well as bioenergetic deficits in blood from patients with WD and in livers of tx-j mice, a mouse model of hepatic copper accumulation. In vitro experiments with hepatocytes treated with CuSO4 were conducted to validate in vivo studies. RESULTS Here, for the first time, we characterized the bioenergetic deficits in WD as consistent with a mitochondrial DNA depletion-like syndrome. This is evidenced by enriched DNA synthesis/replication pathways in serum metabolomics and decreased mitochondrial DNA copy number in blood of WD patients as well as decreased mitochondrial DNA copy number, increased citrate synthase activity, and selective Complex IV deficit in livers of the tx-j mouse model of WD. Tx-j mice treated with the copper chelator penicillamine, methyl donor choline or both ameliorated mitochondrial DNA damage but further decreased mitochondrial DNA copy number. Experiments with copper-loaded HepG2 cells validated the concept of a direct copper-mitochondrial DNA interaction. CONCLUSIONS This study underlines the relevance of targeting the copper-mitochondrial DNA pool in the treatment of WD separate from the established copper-induced oxidative stress-mediated damage.
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Affiliation(s)
- Valentina Medici
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, 4150 V Street, PSSB Suite 3500, University of California Davis, Sacramento, CA 95616,Correspondence: Authors share co-senior authorship, Valentina Medici, M.D., Professor, University of California Davis, Department of Internal Medicine, Division of Gastroenterology and Hepatology, 4150 V Street, PSSB Suite 3500, Sacramento, California 95817, ; Cecilia Giulivi, Ph.D., Professor, University of California Davis, Department of Molecular Biosciences, School of Veterinary Medicine, Medical Investigations of Neurodevelopmental Disorders (MIND) Institute, 1089 Veterinary Dr., 3017 Vet Med 3B, Davis, California 95616,
| | - Gaurav Vilas Sarode
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, 4150 V Street, PSSB Suite 3500, University of California Davis, Sacramento, CA 95616
| | - Eleonora Napoli
- Department of Molecular Biosciences, School of Veterinary Medicine, 1089 Veterinary Medicine Drive, University of California Davis, Davis, CA 95616
| | - Gyu-Young Song
- Department of Molecular Biosciences, School of Veterinary Medicine, 1089 Veterinary Medicine Drive, University of California Davis, Davis, CA 95616
| | - Noreene M. Shibata
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, 4150 V Street, PSSB Suite 3500, University of California Davis, Sacramento, CA 95616
| | - Andre Oliveira Guimarães
- Department of Molecular Biosciences, School of Veterinary Medicine, 1089 Veterinary Medicine Drive, University of California Davis, Davis, CA 95616,Laboratório de Ciências Físicas, Universidade Estadual do Norte Fluminense, Campos dos Goytacazes RJ, Brazil
| | - Charles E. Mordaunt
- Department of Medical Microbiology and Immunology, Genome Center, University of California Davis, Davis, CA 95616,Medical Investigations of Neurodevelopmental Disorders (MIND) Institute, 2825 50 St, University of California Davis, Davis, CA 95817
| | - Dorothy A. Kieffer
- Department of Internal Medicine, Division of Gastroenterology and Hepatology, 4150 V Street, PSSB Suite 3500, University of California Davis, Sacramento, CA 95616
| | - Tagreed A. Mazi
- Department of Nutrition, University of California Davis, Davis, CA 95616,Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Anna Czlonkowska
- Second Department of Neurology, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Tomasz Litwin
- Second Department of Neurology, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - Janine M. LaSalle
- Department of Medical Microbiology and Immunology, Genome Center, University of California Davis, Davis, CA 95616,Medical Investigations of Neurodevelopmental Disorders (MIND) Institute, 2825 50 St, University of California Davis, Davis, CA 95817
| | - Cecilia Giulivi
- Department of Molecular Biosciences, School of Veterinary Medicine, 1089 Veterinary Medicine Drive, University of California Davis, Davis, CA 95616,Medical Investigations of Neurodevelopmental Disorders (MIND) Institute, 2825 50 St, University of California Davis, Davis, CA 95817,Correspondence: Authors share co-senior authorship, Valentina Medici, M.D., Professor, University of California Davis, Department of Internal Medicine, Division of Gastroenterology and Hepatology, 4150 V Street, PSSB Suite 3500, Sacramento, California 95817, ; Cecilia Giulivi, Ph.D., Professor, University of California Davis, Department of Molecular Biosciences, School of Veterinary Medicine, Medical Investigations of Neurodevelopmental Disorders (MIND) Institute, 1089 Veterinary Dr., 3017 Vet Med 3B, Davis, California 95616,
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Sen MK, Almuslehi MSM, Shortland PJ, Coorssen JR, Mahns DA. Revisiting the Pathoetiology of Multiple Sclerosis: Has the Tail Been Wagging the Mouse? Front Immunol 2020; 11:572186. [PMID: 33117365 PMCID: PMC7553052 DOI: 10.3389/fimmu.2020.572186] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Accepted: 08/27/2020] [Indexed: 12/18/2022] Open
Abstract
Multiple Sclerosis (MS) is traditionally considered an autoimmune-mediated demyelinating disease, the pathoetiology of which is unknown. However, the key question remains whether autoimmunity is the initiator of the disease (outside-in) or the consequence of a slow and as yet uncharacterized cytodegeneration (oligodendrocytosis), which leads to a subsequent immune response (inside-out). Experimental autoimmune encephalomyelitis has been used to model the later stages of MS during which the autoimmune involvement predominates. In contrast, the cuprizone (CPZ) model is used to model early stages of the disease during which oligodendrocytosis and demyelination predominate and are hypothesized to precede subsequent immune involvement in MS. Recent studies combining a boost, or protection, to the immune system with disruption of the blood brain barrier have shown CPZ-induced oligodendrocytosis with a subsequent immune response. In this Perspective, we review these recent advances and discuss the likelihood of an inside-out vs. an outside-in pathoetiology of MS.
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Affiliation(s)
- Monokesh K Sen
- School of Medicine, Western Sydney University, Penrith, NSW, Australia
| | - Mohammed S M Almuslehi
- School of Medicine, Western Sydney University, Penrith, NSW, Australia.,Department of Physiology, College of Veterinary Medicine, University of Diyala, Baqubah, Iraq
| | - Peter J Shortland
- School of Science, Western Sydney University, Penrith, NSW, Australia
| | - Jens R Coorssen
- Departments of Health Sciences and Biological Sciences, Faculties of Applied Health Sciences and Mathematics & Science, Brock University, St. Catharines, ON, Canada
| | - David A Mahns
- School of Medicine, Western Sydney University, Penrith, NSW, Australia
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Abstract
The human brain weighs approximately 2% of the body; however, it consumes about 20% of a
person’s total energy intake. Cellular bioenergetics in the central nervous system
involves a delicate balance between biochemical processes engaged in energy conversion and
those responsible for respiration. Neurons have high energy demands, which rely on
metabolic coupling with glia, such as with oligodendrocytes and astrocytes. It has been
well established that astrocytes recycle and transport glutamine to neurons to make the
essential neurotransmitters, glutamate and GABA, as well as shuttle lactate to support
energy synthesis in neurons. However, the metabolic role of oligodendrocytes in the
central nervous system is less clear. In this review, we discuss the energetic demands of
oligodendrocytes in their survival and maturation, the impact of altered oligodendrocyte
energetics on disease pathology, and the role of energetic metabolites, taurine, creatine,
N-acetylaspartate, and biotin, in regulating oligodendrocyte
function.
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Affiliation(s)
- Lauren Rosko
- Department of Biology, Georgetown University, Washington, DC, USA.,Interdisciplinary Program in Neuroscience, Georgetown University, Washington, DC, USA
| | - Victoria N Smith
- Department of Biology, Georgetown University, Washington, DC, USA
| | - Reiji Yamazaki
- Department of Biology, Georgetown University, Washington, DC, USA
| | - Jeffrey K Huang
- Department of Biology, Georgetown University, Washington, DC, USA.,Interdisciplinary Program in Neuroscience, Georgetown University, Washington, DC, USA.,Center for Cell Reprogramming, Georgetown University, Washington, DC, USA
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Rahmanzadeh R, Sahraian MA, Rahmanzade R, Rodriguez M. Demyelination with preferential MAG loss: A complex message from MS paraffin blocks. J Neurol Sci 2017; 385:126-130. [PMID: 29406891 DOI: 10.1016/j.jns.2017.12.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 12/14/2017] [Accepted: 12/22/2017] [Indexed: 01/03/2023]
Abstract
Multiple sclerosis (MS) is generally considered to be a demyelinating autoimmune disorder. However, neuropathological examinations of MS lesions do not support this concept. Demyelination with preferential loss of myelin-associated glycoprotein (MAG) is a common finding in MS tissues and has been reported by several groups. As MAG is located in ad-axonal myelin layers and is not accessible to infiltrating immune cells, demyelination with preferred loss of MAG may be suggestive of a primary oligodendrocytopathy in MS. Moreover, it has been shown that oligodendrocytopathy may precede the infiltration of inflammatory cells at the lesion site. In this paper, we review studies of neuropathology of MS tissues that reported this type of demyelination and then we discuss three emerging explanations that are trying to interpret this mismatched observation.
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Affiliation(s)
- Reza Rahmanzadeh
- MS Research Center, Neuroscience Institute, Tehran University of Medical Science, Tehran, Iran
| | - Mohammad Ali Sahraian
- MS Research Center, Neuroscience Institute, Tehran University of Medical Science, Tehran, Iran
| | - Ramin Rahmanzade
- MS Research Center, Neuroscience Institute, Tehran University of Medical Science, Tehran, Iran
| | - Moses Rodriguez
- Department of Neurology, Mayo Clinic College of Medicine and Science, Rochester, MN, USA.
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Faizi M, Salimi A, Seydi E, Naserzadeh P, Kouhnavard M, Rahimi A, Pourahmad J. Toxicity of cuprizone a Cu(2+) chelating agent on isolated mouse brain mitochondria: a justification for demyelination and subsequent behavioral dysfunction. Toxicol Mech Methods 2016; 26:276-83. [PMID: 27088566 DOI: 10.3109/15376516.2016.1172284] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Multiple Sclerosis (MS) is a complex disease with an unknown etiology and no effective cure, despite decades of extensive research that led to the development of several partially effective treatments. In this study we aimed to investigate brain mitochondrial dysfunction in demyelination induced by cuprizone in mice. Cuprizone was used for induction of demyelination in mice through a diet containing 0.2% w/w cuprizone for 5 weeks. Behavioral tests for proving of MS was performed and then mitochondria from brain of animals were isolated and afterwards parameters of mitochondrial dysfunction examined. Results of mitochondrial dysfunction parameters such as mitochondrial swelling, production ROS, collapse of the membrane potential showed that isolated mitochondria from cuprizone treated mice have been damaged compared to those of untreated control mice. It is likely that demyelination induced mitochondrial damage led to increased mitochondrial ROS formation and progression of oxidative damages in neurons. It is suggested that cuprizone which is a Cu(2+) chelating agent causes impairment of electron transport chain (complex IV) and antioxidant system (SOD) in mitochondria leading to decreased ATP production and increased ROS formation.
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Affiliation(s)
- Mehrdad Faizi
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy , Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Ahmad Salimi
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy , Shahid Beheshti University of Medical Sciences , Tehran , Iran ;,b Department of Pharmacology and Toxicology , School of Pharmacy, Ardabil University of Medical Science , Ardabil , Iran ;,c Students Research Committee, School of Pharmacy, Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Enayatolla Seydi
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy , Shahid Beheshti University of Medical Sciences , Tehran , Iran ;,c Students Research Committee, School of Pharmacy, Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Parvaneh Naserzadeh
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy , Shahid Beheshti University of Medical Sciences , Tehran , Iran ;,c Students Research Committee, School of Pharmacy, Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Mehdi Kouhnavard
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy , Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Atena Rahimi
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy , Shahid Beheshti University of Medical Sciences , Tehran , Iran
| | - Jalal Pourahmad
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy , Shahid Beheshti University of Medical Sciences , Tehran , Iran
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Schmidt RE, Parvin CA, Green KG. Synaptic ultrastructural alterations anticipate the development of neuroaxonal dystrophy in sympathetic ganglia of aged and diabetic mice. J Neuropathol Exp Neurol 2008; 67:1166-86. [PMID: 19018240 PMCID: PMC2665250 DOI: 10.1097/nen.0b013e318190d6db] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Neuroaxonal dystrophy, a distinctive axonopathy characterized by marked enlargement of distal axons, is the hallmark pathologic alteration in aged and diabetic human prevertebral sympathetic ganglia and in corresponding rodent models. Neuroaxonal dystrophy is thought to represent the abnormal outcome of cycles of synaptic degeneration and regeneration; a systematic study of identified axon terminals in aged and diabetic prevertebral ganglia, however, has not previously been performed. We examined the initial changes that develop in presynaptic and postsynaptic elements in sympathetic ganglia of aged and diabetic mice and found numerous synaptic changes involving both presynaptic and postsynaptic elements. Early alterations in presynaptic axon terminal size, vesicle content, and morphology culminate in the development of anastomosing membranous tubulovesicular aggregates, accumulation of autophagosomes, and amorphous debris that form a continuum with progressively larger classically dystrophic swellings. Dendritic changes consist of the development of swellings composed of delicate tubulovesicular elements and mitochondriopathy characterized by increased numbers of small mitochondria and, exclusively in aged ganglia, megamitochondria. These results support the hypothesis that neuroaxonal dystrophy results from progressive changes in presynaptic axon terminals that likely involve membrane dynamics and which are accompanied by distinctive changes in postsynaptic dendritic elements.
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Affiliation(s)
- Robert E Schmidt
- Division of Neuropathology, Department of Pathology and Immunology, Washington University School of Medicine, St Louis, Missouri 63110, USA.
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Levenson CW, Song Y, Narayanan VS, Fitch CA, Yeiser EC. Regulation of mitochondrial cytochrome b mRNA by copper in cultured human hepatoma cells and rat liver. Biol Trace Elem Res 1999; 70:149-64. [PMID: 10535524 DOI: 10.1007/bf02783856] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Copper overload and deficiency are known to cause morphological and functional mitochondrial abnormalities. The reverse transcriptase-polymerase chain reaction (RT-PCR)-based method of differential display of mRNA was used to identify genes with altered expression in cultured human hepatoma cells (Hep G2) exposed to increasing concentrations of copper (0-100 microM, 24 h). Copper regulation of a cloned PCR product, identified as the gene for the mitochondrially encoded cytochrome b, was confirmed by Northern analysis and in situ hybridization. Copper toxicity increased cytochrome b mRNA abundance up to 3.6-fold, and copper chelation reduced it by 50%. Hepatic cytochrome b mRNA was also increased in rats fed a high-copper diet. Thapsigargin treatment resulted in a significant increase in cytochrome b mRNA, suggesting that an increase in intracellular calcium may be involved in the mechanism of copper action. Furthermore, although cyclohexamide (CHX) alone did not increase cytochrome b mRNA, the addition of CHX and copper resulted in a sixfold increase. These data suggest a role for cytochrome b in the response to increases or decreases in hepatic copper.
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Affiliation(s)
- C W Levenson
- Department of Nutrition, Food and Exercise Sciences, Florida State University, Tallahassee 32306-4340, USA
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TANDLER BERNARD, HOPPEL CHARLESL. Studies on Giant Mitochondria. Ann N Y Acad Sci 1986. [DOI: 10.1111/j.1749-6632.1986.tb54394.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
Demyelination was produced in mice by intracerebral inoculation of Theiler's murine encephalomyelitis virus. The earliest ultrastructural changes occurred in the inner cytoplasmic tongues of oligodendrocytes, the most distal extension of these cells. Viral antigen was localized to glial loops that connect with myelin lamellae. This study indicates that a "dying-back" process may occur in virus-infected oligodendrocytes, which then results in demyelination.
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Abstract
Recurrent demyelination was produced in mice by Cuprizone administration. During the second course of Cuprizone, the animals showed greater resistance to the toxin and demyelination occurred slowly and was complete only after prolonged periods. The earliest changes in oligodendrocytes occurred in the most distal processes, the inner cytoplasmic tongues, which showed degenerative changes 3 to 4 weeks before degeneration of the oligodendrocyte cell bodies or demyelination occurred. The results show for the first time that in demyelinating disease, a "dying-back" process similar to that described in axonal disease can affect the oligodendrocyte.
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Russanov EM, Ljutakova SG. Effect of cuprizone on copper exchange and superoxide dismutase activity in rat liver. GENERAL PHARMACOLOGY 1980; 11:535-8. [PMID: 7461431 DOI: 10.1016/0306-3623(80)90086-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Sissoëff I, Grisvard J, Guillé E. Studies on metal ions-DNA interactions: specific behaviour of reiterative DNA sequences. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 1978; 31:165-99. [PMID: 185659 DOI: 10.1016/0079-6107(78)90008-1] [Citation(s) in RCA: 124] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Wagner T, Rafael J. Biochemical properties of liver megamitochondria induced by chloramphenicol or cuprizone. Exp Cell Res 1977; 107:1-13. [PMID: 193704 DOI: 10.1016/0014-4827(77)90379-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Kimberlin RH, Millson GC. The effects of cuprizone toxicity on the incubation period of scrapie in mice. J Comp Pathol 1976; 86:489-96. [PMID: 820729 DOI: 10.1016/0021-9975(76)90017-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Albring M, Radsak K, Thoenes W. Chloramphenicol-induced giant hepatic mitochondria. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 1975; 62:43-4. [PMID: 1134593 DOI: 10.1007/bf00594054] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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