1
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Papandreou A, Singh N, Gianfrancesco L, Budinger D, Barwick K, Agrotis A, Luft C, Shao Y, Lenaerts AS, Gregory A, Jeong SY, Hogarth P, Hayflick S, Barral S, Kriston-Vizi J, Gissen P, Kurian MA, Ketteler R. Cardiac glycosides restore autophagy flux in an iPSC-derived neuronal model of WDR45 deficiency. bioRxiv 2023:2023.09.13.556416. [PMID: 37745522 PMCID: PMC10515824 DOI: 10.1101/2023.09.13.556416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Beta-Propeller Protein-Associated Neurodegeneration (BPAN) is one of the commonest forms of Neurodegeneration with Brain Iron Accumulation, caused by mutations in the gene encoding the autophagy-related protein, WDR45. The mechanisms linking autophagy, iron overload and neurodegeneration in BPAN are poorly understood and, as a result, there are currently no disease-modifying treatments for this progressive disorder. We have developed a patient-derived, induced pluripotent stem cell (iPSC)-based midbrain dopaminergic neuronal cell model of BPAN (3 patient, 2 age-matched controls and 2 isogenic control lines) which shows defective autophagy and aberrant gene expression in key neurodegenerative, neurodevelopmental and collagen pathways. A high content imaging-based medium-throughput blinded drug screen using the FDA-approved Prestwick library identified 5 cardiac glycosides that both corrected disease-related defective autophagosome formation and restored BPAN-specific gene expression profiles. Our findings have clear translational potential and emphasise the utility of iPSC-based modelling in elucidating disease pathophysiology and identifying targeted therapeutics for early-onset monogenic disorders.
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Affiliation(s)
- Apostolos Papandreou
- Developmental Neurosciences, Zayed Centre for Research into Rare Disease in Children, University College London Great Ormond Street Institute of Child Health, London, UK
- Laboratory for Molecular Cell Biology, University College London, London, UK
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Nivedita Singh
- Laboratory for Molecular Cell Biology, University College London, London, UK
| | - Lorita Gianfrancesco
- Developmental Neurosciences, Zayed Centre for Research into Rare Disease in Children, University College London Great Ormond Street Institute of Child Health, London, UK
| | - Dimitri Budinger
- Developmental Neurosciences, Zayed Centre for Research into Rare Disease in Children, University College London Great Ormond Street Institute of Child Health, London, UK
| | - Katy Barwick
- Developmental Neurosciences, Zayed Centre for Research into Rare Disease in Children, University College London Great Ormond Street Institute of Child Health, London, UK
| | - Alexander Agrotis
- Laboratory for Molecular Cell Biology, University College London, London, UK
| | - Christin Luft
- Laboratory for Molecular Cell Biology, University College London, London, UK
| | - Ying Shao
- Wellcome-MRC Cambridge Stem Cell Institute, Cambridge, UK
| | | | | | | | | | | | - Serena Barral
- Developmental Neurosciences, Zayed Centre for Research into Rare Disease in Children, University College London Great Ormond Street Institute of Child Health, London, UK
| | - Janos Kriston-Vizi
- Laboratory for Molecular Cell Biology, University College London, London, UK
| | - Paul Gissen
- Inborn Errors of Metabolism, Genetics & Genomic Medicine Programme, Great Ormond Street Institute of Child Health, University College London, London, UK
- Department of Metabolic Medicine, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Manju A Kurian
- Developmental Neurosciences, Zayed Centre for Research into Rare Disease in Children, University College London Great Ormond Street Institute of Child Health, London, UK
- Department of Neurology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
- These authors contributed equally
| | - Robin Ketteler
- Laboratory for Molecular Cell Biology, University College London, London, UK
- Department of Human Medicine, Medical School Berlin, Berlin, Germany
- These authors contributed equally
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2
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Huang Y, Wan Z, Tang Y, Xu J, Laboret B, Nallamothu S, Yang C, Liu B, Lu RO, Lu B, Feng J, Cao J, Hayflick S, Wu Z, Zhou B. Pantothenate kinase 2 interacts with PINK1 to regulate mitochondrial quality control via acetyl-CoA metabolism. Nat Commun 2022; 13:2412. [PMID: 35504872 PMCID: PMC9065001 DOI: 10.1038/s41467-022-30178-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 04/20/2022] [Indexed: 12/26/2022] Open
Abstract
Human neurodegenerative disorders often exhibit similar pathologies, suggesting a shared aetiology. Key pathological features of Parkinson's disease (PD) are also observed in other neurodegenerative diseases. Pantothenate Kinase-Associated Neurodegeneration (PKAN) is caused by mutations in the human PANK2 gene, which catalyzes the initial step of de novo CoA synthesis. Here, we show that fumble (fbl), the human PANK2 homolog in Drosophila, interacts with PINK1 genetically. fbl and PINK1 mutants display similar mitochondrial abnormalities, and overexpression of mitochondrial Fbl rescues PINK1 loss-of-function (LOF) defects. Dietary vitamin B5 derivatives effectively rescue CoA/acetyl-CoA levels and mitochondrial function, reversing the PINK1 deficiency phenotype. Mechanistically, Fbl regulates Ref(2)P (p62/SQSTM1 homolog) by acetylation to promote mitophagy, whereas PINK1 regulates fbl translation by anchoring mRNA molecules to the outer mitochondrial membrane. In conclusion, Fbl (or PANK2) acts downstream of PINK1, regulating CoA/acetyl-CoA metabolism to promote mitophagy, uncovering a potential therapeutic intervention strategy in PD treatment.
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Affiliation(s)
- Yunpeng Huang
- State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China
- Key Laboratory of Systems Health Science of Zhejiang Province, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310024, China
| | - Zhihui Wan
- State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China
- Department of Laboratory Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing, 100026, China
| | - Yinglu Tang
- Department of Biological Sciences, Dedman College of Humanities and Sciences, Southern Methodist University, Dallas, TX, 75275, USA
| | - Junxuan Xu
- State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Bretton Laboret
- Department of Biological Sciences, Dedman College of Humanities and Sciences, Southern Methodist University, Dallas, TX, 75275, USA
| | - Sree Nallamothu
- Department of Biological Sciences, Dedman College of Humanities and Sciences, Southern Methodist University, Dallas, TX, 75275, USA
| | - Chenyu Yang
- Department of Statistical Science, Dedman College of Humanities and Sciences, Southern Methodist University, Dallas, TX, 75275, USA
| | - Boxiang Liu
- Department of Genetics, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Rongze Olivia Lu
- Department of Neurosurgery, Dell Medical School, University of Texas Austin, Austin, TX, 78712, USA
- Department of Neurological Surgery, Brain Tumor Center, University of California San Francisco, California, CA, 94143, USA
| | - Bingwei Lu
- Department of Pathology, School of Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Juan Feng
- School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Jing Cao
- Department of Statistical Science, Dedman College of Humanities and Sciences, Southern Methodist University, Dallas, TX, 75275, USA
| | - Susan Hayflick
- Department of Molecular & Medical Genetics, Oregon Health and Science University, Portland, OR, 97201, USA
| | - Zhihao Wu
- Department of Biological Sciences, Dedman College of Humanities and Sciences, Southern Methodist University, Dallas, TX, 75275, USA.
| | - Bing Zhou
- State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
- Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.
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3
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Nguyen V, Garcia D, Setthavongsack N, Shirley K, Krajbich V, Clark D, van der Weijden M, Zhen D, Wakeman K, Jeong SY, Freed A, Gregory A, Hogarth P, Hayflick S, Woltjer R. Secondary tauopathy in a genetic synucleinopathy, mitochondrial protein–associated neurodegeneration (MPAN). Alzheimers Dement 2020. [DOI: 10.1002/alz.046690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Vy Nguyen
- Oregon Health Science University Portland OR USA
| | - Daphne Garcia
- Oregon Health and Science University Portland OR USA
| | | | | | | | - David Clark
- Oregon Health and Science University Portland OR USA
| | | | - Dolly Zhen
- Oregon Health and Science University Portland OR USA
| | | | | | - Alison Freed
- Oregon Health and Science University Portland OR USA
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4
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Mohammad SS, Angiti RR, Biggin A, Morales-Briceño H, Goetti R, Perez-Dueñas B, Gregory A, Hogarth P, Ng J, Papandreou A, Bhattacharya K, Rahman S, Prelog K, Webster RI, Wassmer E, Hayflick S, Livingston J, Kurian M, Chong WK, Dale RC. Magnetic resonance imaging pattern recognition in childhood bilateral basal ganglia disorders. Brain Commun 2020; 2:fcaa178. [PMID: 33629063 PMCID: PMC7891249 DOI: 10.1093/braincomms/fcaa178] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/24/2020] [Accepted: 09/18/2020] [Indexed: 12/18/2022] Open
Abstract
Bilateral basal ganglia abnormalities on MRI are observed in a wide variety of childhood disorders. MRI pattern recognition can enable rationalization of investigations and also complement clinical and molecular findings, particularly confirming genomic findings and also enabling new gene discovery. A pattern recognition approach in children with bilateral basal ganglia abnormalities on brain MRI was undertaken in this international multicentre cohort study. Three hundred and five MRI scans belonging to 201 children with 34 different disorders were rated using a standard radiological scoring proforma. In addition, literature review on MRI patterns was undertaken in these 34 disorders and 59 additional disorders reported with bilateral basal ganglia MRI abnormalities. Cluster analysis on first MRI findings from the study cohort grouped them into four clusters: Cluster 1—T2-weighted hyperintensities in the putamen; Cluster 2—T2-weighted hyperintensities or increased MRI susceptibility in the globus pallidus; Cluster 3—T2-weighted hyperintensities in the globus pallidus, brainstem and cerebellum with diffusion restriction; Cluster 4—T1-weighted hyperintensities in the basal ganglia. The 34 diagnostic categories included in this study showed dominant clustering in one of the above four clusters. Inflammatory disorders grouped together in Cluster 1. Mitochondrial and other neurometabolic disorders were distributed across clusters 1, 2 and 3, according to lesions dominantly affecting the striatum (Cluster 1: glutaric aciduria type 1, propionic acidaemia, 3-methylglutaconic aciduria with deafness, encephalopathy and Leigh-like syndrome and thiamine responsive basal ganglia disease associated with SLC19A3), pallidum (Cluster 2: methylmalonic acidaemia, Kearns Sayre syndrome, pyruvate dehydrogenase complex deficiency and succinic semialdehyde dehydrogenase deficiency) or pallidum, brainstem and cerebellum (Cluster 3: vigabatrin toxicity, Krabbe disease). The Cluster 4 pattern was exemplified by distinct T1-weighted hyperintensities in the basal ganglia and other brain regions in genetically determined hypermanganesemia due to SLC39A14 and SLC30A10. Within the clusters, distinctive basal ganglia MRI patterns were noted in acquired disorders such as cerebral palsy due to hypoxic ischaemic encephalopathy in full-term babies, kernicterus and vigabatrin toxicity and in rare genetic disorders such as 3-methylglutaconic aciduria with deafness, encephalopathy and Leigh-like syndrome, thiamine responsive basal ganglia disease, pantothenate kinase-associated neurodegeneration, TUBB4A and hypermanganesemia. Integrated findings from the study cohort and literature review were used to propose a diagnostic algorithm to approach bilateral basal ganglia abnormalities on MRI. After integrating clinical summaries and MRI findings from the literature review, we developed a prototypic decision-making electronic tool to be tested using further cohorts and clinical practice.
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Affiliation(s)
- Shekeeb S Mohammad
- Kids Neuroscience Centre, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia.,TY Nelson Department of Neurology and Neurosurgery, The Children's Hospital at Westmead, Sydney, Australia.,The Children's hospital at Westmead Clinical School, Faculty of Medicine, University of Sydney, Sydney, NSW 2145, Australia
| | - Rajeshwar Reddy Angiti
- Newborn and Peadiatric Emergency Transport Service (NETS), Bankstown, NSW, Australia.,Department of Neonatology, Liverpool Hospital, Liverpool, NSW, Australia
| | - Andrew Biggin
- The Children's hospital at Westmead Clinical School, Faculty of Medicine, University of Sydney, Sydney, NSW 2145, Australia
| | - Hugo Morales-Briceño
- Movement Disorders Unit, Neurology Department, Westmead Hospital, Westmead, NSW 2145, Australia
| | - Robert Goetti
- Medical Imaging, The Children's Hospital at Westmead and Sydney Medical School, University of Sydney, Sydney, Australia
| | - Belen Perez-Dueñas
- Paediatric Neurology Department, Hospital Vall d'Hebrón Universitat Autónoma de Barcelona, Vall d'Hebron Research Institute Barcelona, Barcelona, Spain
| | - Allison Gregory
- Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR, USA
| | - Penelope Hogarth
- Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR, USA
| | - Joanne Ng
- Molecular Neurosciences, Developmental Neurosciences, UCL-Institute of Child Health, London, UK
| | - Apostolos Papandreou
- Molecular Neurosciences, Developmental Neurosciences, UCL-Institute of Child Health, London, UK
| | - Kaustuv Bhattacharya
- Western Sydney Genomics Program, The Children's Hospital at Westmead and Sydney Medical School, University of Sydney, Sydney, Australia
| | - Shamima Rahman
- Mitochondrial Research Group, Genetics and Genomic Medicine, Institute of Child Health, University College London and Metabolic Unit, Great Ormond Street Hospital, London, UK
| | - Kristina Prelog
- Medical Imaging, The Children's Hospital at Westmead and Sydney Medical School, University of Sydney, Sydney, Australia
| | - Richard I Webster
- TY Nelson Department of Neurology and Neurosurgery, The Children's Hospital at Westmead, Sydney, Australia
| | - Evangeline Wassmer
- Department of Paediatric Neurology, Birmingham Children's Hospital, Birmingham, UK
| | - Susan Hayflick
- Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR, USA
| | - John Livingston
- Department of Paediatric Neurology, Leeds Teaching Hospitals Trust, University of Leeds, UK
| | - Manju Kurian
- Molecular Neurosciences, Developmental Neurosciences, UCL-Institute of Child Health, London, UK
| | - W Kling Chong
- Department of Radiology, Great Ormond Street Hospital, London, UK
| | - Russell C Dale
- Kids Neuroscience Centre, The Children's Hospital at Westmead, Westmead, NSW 2145, Australia.,TY Nelson Department of Neurology and Neurosurgery, The Children's Hospital at Westmead, Sydney, Australia.,The Children's hospital at Westmead Clinical School, Faculty of Medicine, University of Sydney, Sydney, NSW 2145, Australia
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5
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Kasapkara ÇS, Tümer L, Gregory A, Ezgü F, İnci A, Derinkuyu BE, Fox R, Rogers C, Hayflick S. A new NBIA patient from Turkey with homozygous C19ORF12 mutation. Acta Neurol Belg 2019; 119:623-625. [PMID: 30298423 DOI: 10.1007/s13760-018-1026-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/05/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Çiğdem Seher Kasapkara
- Department of Pediatric Metabolism and Nutrition, Dr. Sami Ulus Maternity and Children's Research and Education Hospital, Ankara, Turkey.
| | - Leyla Tümer
- Department of Pediatric Metabolism and Nutrition, Gazi University Hospital, Ankara, Turkey
| | - Allison Gregory
- Molecular and Medical Genetics, Pediatrics and Neurology, Oregon Health and Science University, Portland, Oregon, 97239, USA
| | - Fatih Ezgü
- Department of Pediatric Metabolism and Nutrition, Gazi University Hospital, Ankara, Turkey
| | - Aslı İnci
- Department of Pediatric Metabolism and Nutrition, Gazi University Hospital, Ankara, Turkey
| | - Betül Emine Derinkuyu
- Department of Pediatric Radiology, Dr. Sami Ulus Maternity and Children's Research and Education Hospital, Ankara, Turkey
| | - Rachel Fox
- Molecular and Medical Genetics, Pediatrics and Neurology, Oregon Health and Science University, Portland, Oregon, 97239, USA
| | - Caleb Rogers
- Molecular and Medical Genetics, Pediatrics and Neurology, Oregon Health and Science University, Portland, Oregon, 97239, USA
| | - Susan Hayflick
- Molecular and Medical Genetics, Pediatrics and Neurology, Oregon Health and Science University, Portland, Oregon, 97239, USA
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6
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Leduc MS, Mcguire M, Madan-Khetarpal S, Ortiz D, Hayflick S, Keller K, Eng CM, Yang Y, Bi W. De novo apparent loss-of-function mutations in PRR12 in three patients with intellectual disability and iris abnormalities. Hum Genet 2018; 137:257-264. [PMID: 29556724 DOI: 10.1007/s00439-018-1877-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 02/25/2018] [Indexed: 11/24/2022]
Abstract
PRR12 encodes a proline-rich protein nuclear factor suspected to be involved in neural development. Its nuclear expression in fetal brains and in the vision system supports its role in brain and eye development more specifically. However, its function and potential role in human disease has not been determined. Recently, a de novo t(10;19) (q22.3;q13.33) translocation disrupting the PRR12 gene was detected in a girl with intellectual disability and neuropsychiatric alterations. Here we report on three unrelated patients with heterozygous de novo apparent loss-of-function mutations in PRR12 detected by clinical whole exome sequencing: c.1918G>T (p.Glu640*), c.4502_4505delTGCC (p.Leu1501Argfs*146) and c.903_909dup (p.Pro304Thrfs*46). All three patients had global developmental delay, intellectual disability, eye and vision abnormalities, dysmorphic features, and neuropsychiatric problems. Eye abnormalities were consistent among the three patients and consisted of stellate iris pattern and iris coloboma. Additional variable clinical features included hypotonia, skeletal abnormalities, sleeping problems, and behavioral issues such as autism and anxiety. In summary, we propose that haploinsufficiency of PRR12 is associated with this novel multisystem neurodevelopmental disorder.
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Affiliation(s)
- Magalie S Leduc
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030-3411, USA.,Baylor Genetics Laboratories, Houston, TX, USA
| | - Marianne Mcguire
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030-3411, USA
| | | | - Damara Ortiz
- Children's Hospital of Pittsburgh of UPMC, University of Pittsburgh, Pittsburgh, PA, USA
| | - Susan Hayflick
- Department of Molecular and Medical Genetics, Oregon Health and Sciences University, Portland, OR, USA
| | - Kory Keller
- Department of Molecular and Medical Genetics, Oregon Health and Sciences University, Portland, OR, USA
| | - Christine M Eng
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030-3411, USA.,Baylor Genetics Laboratories, Houston, TX, USA
| | - Yaping Yang
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030-3411, USA.,Baylor Genetics Laboratories, Houston, TX, USA
| | - Weimin Bi
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030-3411, USA. .,Baylor Genetics Laboratories, Houston, TX, USA.
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7
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Aoun M, Corsetto PA, Nugue G, Montorfano G, Ciusani E, Crouzier D, Hogarth P, Gregory A, Hayflick S, Zorzi G, Rizzo AM, Tiranti V. Changes in Red Blood Cell membrane lipid composition: A new perspective into the pathogenesis of PKAN. Mol Genet Metab 2017; 121:180-189. [PMID: 28456385 DOI: 10.1016/j.ymgme.2017.04.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 04/14/2017] [Accepted: 04/14/2017] [Indexed: 01/12/2023]
Abstract
Pantothenate Kinase-Associated Neurodegeneration (PKAN) is a form of Neurodegeneration with Brain Iron Accumulation (NBIA) associated with mutations in the pantothenate kinase 2 gene (PANK2). The PANK2 catalyzes the first step of coenzyme A (CoA) biosynthesis, a pathway producing an essential cofactor that plays a key role in energy and lipid metabolism. The majority of PANK2 mutations reduces or abolishes the activity of the enzyme. In around 10% of cases with PKAN, the presence of deformed red blood cells with thorny protrusions in the circulation has been detected. Changes in membrane protein expression and assembly during erythropoiesis were previously explored in patients with PKAN. However, data on red blood cell membrane phospholipid organization are still missing in this disease. In this study, we performed lipidomic analysis on red blood cells from Italian patients affected by PKAN with a particular interest in membrane physico-chemical properties. We showed an increased number of small red blood cells together with membrane phospholipid alteration, particularly a significant increase in sphingomyelin (SM)/phosphatidylcholine (PC) and SM/phosphatidylethanolamine (PE) ratios, in subjects with PKAN. The membrane structural abnormalities were associated with membrane fluidity perturbation. These morphological and functional characteristics of red blood cells in patients with PKAN offer new possible tools in order to shed light on the pathogenesis of the disease and to possibly identify further biomarkers for clinical studies.
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Affiliation(s)
- Manar Aoun
- Unit of Molecular Neurogenetics, Pierfranco and Luisa Mariani Centre for the Study of Mitochondrial Disorders in Children, Foundation IRCCS Neurological Institute C. Besta, Via Temolo 4, 20126 Milan, Italy
| | - Paola Antonia Corsetto
- Department of Pharmacological and Biomolecular Sciences, Laboratory of Membrane Biochemistry and Applied Nutrition, Università degli Studi di Milano, Milan, Italy
| | - Guillaume Nugue
- IRBA, Unité des Risques Technologiques Emergeants BP 73, 91223 Brétigny sur Orge Cedex, France
| | - Gigliola Montorfano
- Department of Pharmacological and Biomolecular Sciences, Laboratory of Membrane Biochemistry and Applied Nutrition, Università degli Studi di Milano, Milan, Italy
| | - Emilio Ciusani
- Unit of Clinical Pathology and Medical Genetics, Foundation IRCCS Neurological Institute C. Besta, Milan, Italy
| | - David Crouzier
- IRBA, Unité des Risques Technologiques Emergeants BP 73, 91223 Brétigny sur Orge Cedex, France
| | - Penelope Hogarth
- Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR 97239, United States
| | - Allison Gregory
- Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR 97239, United States
| | - Susan Hayflick
- Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, OR 97239, United States
| | - Giovanna Zorzi
- Unit of Child Neurology, Foundation IRCCS Neurological Institute C. Besta, Milan, Italy
| | - Angela Maria Rizzo
- Department of Pharmacological and Biomolecular Sciences, Laboratory of Membrane Biochemistry and Applied Nutrition, Università degli Studi di Milano, Milan, Italy.
| | - Valeria Tiranti
- Unit of Molecular Neurogenetics, Pierfranco and Luisa Mariani Centre for the Study of Mitochondrial Disorders in Children, Foundation IRCCS Neurological Institute C. Besta, Via Temolo 4, 20126 Milan, Italy.
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8
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Long M, Abdeen N, Geraghty MT, Hogarth P, Hayflick S, Venkateswaran S. Novel WDR45 Mutation and Pathognomonic BPAN Imaging in a Young Female With Mild Cognitive Delay. Pediatrics 2015; 136:e714-7. [PMID: 26240209 DOI: 10.1542/peds.2015-0750] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/19/2015] [Indexed: 11/24/2022] Open
Abstract
β-propeller protein-associated neurodegeneration (BPAN) is a recently identified X-linked dominant form of neurodegeneration with brain iron accumulation caused by mutations in the WDR45 gene. BPAN commonly presents as global developmental delay in childhood with rapid onset of parkinsonism and dementia in early adulthood and associated pathognomonic changes seen on brain MRI. In this case report, we present a pediatric patient with mild cognitive delay and pathognomonic MRI changes indicative of BPAN preceding neurologic deterioration who is found to have a novel de novo mutation in the WDR45 gene.
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Affiliation(s)
| | | | | | - Penelope Hogarth
- Departments of Molecular and Medical Genetics and Neurology, Oregon Health & Science University, Portland, Oregon
| | - Susan Hayflick
- Departments of Molecular and Medical Genetics and Neurology, Oregon Health & Science University, Portland, Oregon
| | - Sunita Venkateswaran
- Division of Neurology, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, Canada; and
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9
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Crisp SJ, Meyer E, Gregory A, Archer H, Hayflick S, Kurian MA, de Silva R. WDR45Mutation in Atypical Rett Syndrome with Brain Iron Accumulation. Mov Disord Clin Pract 2015; 2:81-83. [DOI: 10.1002/mdc3.12120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 10/15/2014] [Accepted: 10/17/2014] [Indexed: 11/06/2022] Open
Affiliation(s)
- Sarah J. Crisp
- Department of Neurology; Essex Center for Neurological Sciences; Queen's Hospital; Romford Essex United Kingdom
| | - Esther Meyer
- Neurosciences Unit-Institute of Child Health; University College London; London United Kingdom
| | - Allison Gregory
- Department of Molecular and Medical Genetics; Oregon Health & Science University; Portland Oregon USA
| | - Hayley Archer
- Institute of Medical Genetics; University Hospital of Wales; Cardiff United Kingdom
| | - Susan Hayflick
- Department of Molecular and Medical Genetics; Oregon Health & Science University; Portland Oregon USA
- Department of Pediatrics; Oregon Health & Science University; Portland Oregon USA
- Department of Neurology; Oregon Health & Science University; Portland Oregon USA
| | - Manju A. Kurian
- Neurosciences Unit-Institute of Child Health; University College London; London United Kingdom
- Department of Neurology; Great Ormond Street Hospital; London Essex United Kingdom
| | - Rajith de Silva
- Department of Neurology; Essex Center for Neurological Sciences; Queen's Hospital; Romford Essex United Kingdom
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10
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Sibon O, Hayflick S, Tiranti V. Modeling PKAN in Mice and Flies. Mov Disord 2015. [DOI: 10.1016/b978-0-12-405195-9.00059-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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11
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Gautschi M, Merlini L, Calza AM, Hayflick S, Nuoffer JM, Fluss J. Late diagnosis of fucosidosis in a child with progressive fixed dystonia, bilateral pallidal lesions and red spots on the skin. Eur J Paediatr Neurol 2014; 18:516-9. [PMID: 24636010 DOI: 10.1016/j.ejpn.2014.02.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 02/14/2014] [Accepted: 02/16/2014] [Indexed: 11/19/2022]
Abstract
Fucosidosis is a rare lysosomal storage disease. A 14-year-old girl is presented, with recurrent infections, progressive dystonic movement disorder and mental retardation with onset in early childhood. The clinical picture was also marked by mild morphologic features, but absent dysostosis multiplex and organomegaly. MRI images at 6.5 years of age were reminiscent of pallidal iron deposition ("eye-of-the-tiger" sign) seen in neurodegeneration with brain iron accumulation (NBIA) disorders. Progressively spreading angiokeratoma corporis diffusum led to the correct diagnosis. This case extends the scope of clinical and neuroradiological manifestations of fucosidosis.
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Affiliation(s)
| | - Laura Merlini
- Pediatric Radiology Unit, Geneva Children's Hospital, Switzerland
| | - Anne-Marie Calza
- Department of Dermatology, University Hospital Geneva, Switzerland
| | - Susan Hayflick
- Molecular & Medical Genetics, Oregon Health & Science University, USA
| | - Jean-Marc Nuoffer
- University Institute of Clinical Chemistry, Inselspital Bern, Switzerland
| | - Joel Fluss
- Pediatric Neurology, Geneva Children's Hospital, Switzerland
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12
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Dusi S, Valletta L, Haack TB, Tsuchiya Y, Venco P, Pasqualato S, Goffrini P, Tigano M, Demchenko N, Wieland T, Schwarzmayr T, Strom TM, Invernizzi F, Garavaglia B, Gregory A, Sanford L, Hamada J, Bettencourt C, Houlden H, Chiapparini L, Zorzi G, Kurian MA, Nardocci N, Prokisch H, Hayflick S, Gout I, Tiranti V. Exome sequence reveals mutations in CoA synthase as a cause of neurodegeneration with brain iron accumulation. Am J Hum Genet 2014; 94:11-22. [PMID: 24360804 DOI: 10.1016/j.ajhg.2013.11.008] [Citation(s) in RCA: 134] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 11/14/2013] [Indexed: 11/19/2022] Open
Abstract
Neurodegeneration with brain iron accumulation (NBIA) comprises a clinically and genetically heterogeneous group of disorders with progressive extrapyramidal signs and neurological deterioration, characterized by iron accumulation in the basal ganglia. Exome sequencing revealed the presence of recessive missense mutations in COASY, encoding coenzyme A (CoA) synthase in one NBIA-affected subject. A second unrelated individual carrying mutations in COASY was identified by Sanger sequence analysis. CoA synthase is a bifunctional enzyme catalyzing the final steps of CoA biosynthesis by coupling phosphopantetheine with ATP to form dephospho-CoA and its subsequent phosphorylation to generate CoA. We demonstrate alterations in RNA and protein expression levels of CoA synthase, as well as CoA amount, in fibroblasts derived from the two clinical cases and in yeast. This is the second inborn error of coenzyme A biosynthesis to be implicated in NBIA.
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Affiliation(s)
- Sabrina Dusi
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta," 20126 Milan, Italy
| | - Lorella Valletta
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta," 20126 Milan, Italy
| | - Tobias B Haack
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, 85764 Munich, Germany
| | - Yugo Tsuchiya
- Institute of Structural and Molecular Biology, University College London, London WC1E 6BT, UK
| | - Paola Venco
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta," 20126 Milan, Italy
| | - Sebastiano Pasqualato
- Crystallography Unit, Department of Experimental Oncology, European Institute of Oncology, IFOM-IEO Campus, 20139 Milan, Italy
| | - Paola Goffrini
- Department of Life Sciences, University of Parma, 43124 Parma, Italy
| | - Marco Tigano
- Department of Life Sciences, University of Parma, 43124 Parma, Italy
| | - Nikita Demchenko
- Institute of Structural and Molecular Biology, University College London, London WC1E 6BT, UK
| | - Thomas Wieland
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Munich, Germany
| | - Thomas Schwarzmayr
- Institute of Human Genetics, Helmholtz Zentrum München, 85764 Munich, Germany
| | - Tim M Strom
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, 85764 Munich, Germany
| | - Federica Invernizzi
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta," 20126 Milan, Italy
| | - Barbara Garavaglia
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta," 20126 Milan, Italy
| | - Allison Gregory
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, OR 97329, USA
| | - Lynn Sanford
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, OR 97329, USA
| | - Jeffrey Hamada
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, OR 97329, USA
| | - Conceição Bettencourt
- UCL Institute of Neurology and The National Hospital for Neurology and Neurosurgery, Queen Square, London WC1N 3BG, UK
| | - Henry Houlden
- UCL Institute of Neurology and The National Hospital for Neurology and Neurosurgery, Queen Square, London WC1N 3BG, UK
| | - Luisa Chiapparini
- Unit of Neuroradiology, IRCCS Foundation Neurological Institute "C. Besta," 20133 Milan, Italy
| | - Giovanna Zorzi
- Unit of Child Neurology, IRCCS Foundation Neurological Institute "C. Besta," 20133 Milan, Italy
| | - Manju A Kurian
- Neurosciences Unit, UCL-Institute of Child Health, Great Ormond Street Hospital, London WC1N 3JH, UK; Department of Neurology, Great Ormond Street Hospital, London WC1N 3JH, UK
| | - Nardo Nardocci
- Unit of Child Neurology, IRCCS Foundation Neurological Institute "C. Besta," 20133 Milan, Italy
| | - Holger Prokisch
- Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany; Institute of Human Genetics, Helmholtz Zentrum München, 85764 Munich, Germany
| | - Susan Hayflick
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, OR 97329, USA
| | - Ivan Gout
- Institute of Structural and Molecular Biology, University College London, London WC1E 6BT, UK
| | - Valeria Tiranti
- Unit of Molecular Neurogenetics - Pierfranco and Luisa Mariani Center for the study of Mitochondrial Disorders in Children, IRCCS Foundation Neurological Institute "C. Besta," 20126 Milan, Italy.
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Crisp S, Meyer E, Gregory A, Archer H, Hayflick S, Kurian MA, de Silva R. A RETT-LOOK-ALIKE WITH BRAIN IRON ACCUMULATION. J Neurol Neurosurg Psychiatry 2013. [DOI: 10.1136/jnnp-2013-306573.38] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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14
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Siegl C, Hamminger P, Jank H, Ahting U, Bader B, Danek A, Gregory A, Hartig M, Hayflick S, Hermann A, Prokisch H, Sammler EM, Yapici Z, Prohaska R, Salzer U. Alterations of red cell membrane properties in neuroacanthocytosis. PLoS One 2013; 8:e76715. [PMID: 24098554 PMCID: PMC3789665 DOI: 10.1371/journal.pone.0076715] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 08/23/2013] [Indexed: 11/18/2022] Open
Abstract
Neuroacanthocytosis (NA) refers to a group of heterogenous, rare genetic disorders, namely chorea acanthocytosis (ChAc), McLeod syndrome (MLS), Huntington’s disease-like 2 (HDL2) and pantothenate kinase associated neurodegeneration (PKAN), that mainly affect the basal ganglia and are associated with similar neurological symptoms. PKAN is also assigned to a group of rare neurodegenerative diseases, known as NBIA (neurodegeneration with brain iron accumulation), associated with iron accumulation in the basal ganglia and progressive movement disorder. Acanthocytosis, the occurrence of misshaped erythrocytes with thorny protrusions, is frequently observed in ChAc and MLS patients but less prevalent in PKAN (about 10%) and HDL2 patients. The pathological factors that lead to the formation of the acanthocytic red blood cell shape are currently unknown. The aim of this study was to determine whether NA/NBIA acanthocytes differ in their functionality from normal erythrocytes. Several flow-cytometry-based assays were applied to test the physiological responses of the plasma membrane, namely drug-induced endocytosis, phosphatidylserine exposure and calcium uptake upon treatment with lysophosphatidic acid. ChAc red cell samples clearly showed a reduced response in drug-induced endovesiculation, lysophosphatidic acid-induced phosphatidylserine exposure, and calcium uptake. Impaired responses were also observed in acanthocyte-positive NBIA (PKAN) red cells but not in patient cells without shape abnormalities. These data suggest an “acanthocytic state” of the red cell where alterations in functional and interdependent membrane properties arise together with an acanthocytic cell shape. Further elucidation of the aberrant molecular mechanisms that cause this acanthocytic state may possibly help to evaluate the pathological pathways leading to neurodegeneration.
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Affiliation(s)
- Claudia Siegl
- Max F. Perutz Laboratories, Medical University of Vienna, Vienna, Austria
| | - Patricia Hamminger
- Max F. Perutz Laboratories, Medical University of Vienna, Vienna, Austria
| | - Herbert Jank
- Max F. Perutz Laboratories, Medical University of Vienna, Vienna, Austria
| | - Uwe Ahting
- Institute of Human Genetics, Technische Universität München, Munich, Germany
| | - Benedikt Bader
- Neurologische Klinik und Poliklinik, Ludwig-Maximilians-Universität, Munich, Germany
| | - Adrian Danek
- Neurologische Klinik und Poliklinik, Ludwig-Maximilians-Universität, Munich, Germany
| | - Allison Gregory
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Monika Hartig
- Institute of Human Genetics, Technische Universität München, Munich, Germany
| | - Susan Hayflick
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, Oregon, United States of America
- Departments of Pediatrics and Neurology, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Andreas Hermann
- Division of Neurodegenerative Diseases, Department of Neurology, Dresden University of Technology and German Centre for Neurodegenerative Diseases (DZNE), Dresden, Germany
| | - Holger Prokisch
- Institute of Human Genetics, Technische Universität München, Munich, Germany
- Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - Esther M. Sammler
- Neurology Department, Ninewells Hospital and Medical School, University of Dundee, Dundee, United Kingdom
| | - Zuhal Yapici
- Division of Child Neurology, Department of Neurology, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Rainer Prohaska
- Max F. Perutz Laboratories, Medical University of Vienna, Vienna, Austria
| | - Ulrich Salzer
- Max F. Perutz Laboratories, Medical University of Vienna, Vienna, Austria
- * E-mail:
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15
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Kaul B, Goyal V, Shukla G, Srivastava A, Garg A, Bader B, Danek A, Hayflick S, Behari M. Mineral deposition on magnetic resonance imaging in chorea-acanthocytosis: a pathogenic link with pantothenate kinase-associated neurodegeneration? Neurol India 2013; 61:169-70. [PMID: 23644319 DOI: 10.4103/0028-3886.111129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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16
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Agarwal P, Hogarth P, Hayflick S, MacLeod P, Kuriakose R, McKenzie J, Heffernan N, Dinelle K, Sossi V, Stoessl AJ. Imaging striatal dopaminergic function inPhospholipase A2 Group VI-related parkinsonism. Mov Disord 2012. [DOI: 10.1002/mds.25160] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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17
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Brunetti D, Dusi S, Morbin M, Uggetti A, Moda F, D'Amato I, Giordano C, d'Amati G, Cozzi A, Levi S, Hayflick S, Tiranti V. Pantothenate kinase-associated neurodegeneration: altered mitochondria membrane potential and defective respiration in Pank2 knock-out mouse model. Hum Mol Genet 2012; 21:5294-305. [PMID: 22983956 PMCID: PMC3510755 DOI: 10.1093/hmg/dds380] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Neurodegeneration with brain iron accumulation (NBIA) comprises a group of neurodegenerative disorders characterized by high brain content of iron and presence of axonal spheroids. Mutations in the PANK2 gene, which encodes pantothenate kinase 2, underlie an autosomal recessive inborn error of coenzyme A metabolism, called pantothenate kinase-associated neurodegeneration (PKAN). PKAN is characterized by dystonia, dysarthria, rigidity and pigmentary retinal degeneration. The pathogenesis of this disorder is poorly understood and, although PANK2 is a mitochondrial protein, perturbations in mitochondrial bioenergetics have not been reported. A knock-out (KO) mouse model of PKAN exhibits retinal degeneration and azoospermia, but lacks any neurological phenotype. The absence of a clinical phenotype has partially been explained by the different cellular localization of the human and murine PANK2 proteins. Here we demonstrate that the mouse Pank2 protein localizes to mitochondria, similar to its human orthologue. Moreover, we show that Pank2-defective neurons derived from KO mice have an altered mitochondrial membrane potential, a defect further corroborated by the observations of swollen mitochondria at the ultra-structural level and by the presence of defective respiration.
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Affiliation(s)
- Dario Brunetti
- Unit of Molecular Neurogenetics, IRCCS Foundation Neurological Institute 'C. Besta', Milan, Italy
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18
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Agarwal P, Hogarth P, Hayflick S, Macleod P, McKenzie J, Heffernan N, Dinelle K, Sossi V, Stoessl A. 2.027 FUNCTIONAL IMAGING OF NIGROSTRIATAL DOPAMINERGIC SYSTEM WITH POSITRON EMISSION TOMOGRAPHY IN ADULT-ONSET DYSTONIA-PARKINSONISM (PARK14) DUE TO PLA2G6 MUTATION. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70460-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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19
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Siudeja K, Srinivasan B, Xu L, Rana A, de Jong J, Nollen EAA, Jackowski S, Sanford L, Hayflick S, Sibon OCM. Impaired Coenzyme A metabolism affects histone and tubulin acetylation in Drosophila and human cell models of pantothenate kinase associated neurodegeneration. EMBO Mol Med 2011; 3:755-66. [PMID: 21998097 PMCID: PMC3377114 DOI: 10.1002/emmm.201100180] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 08/31/2011] [Accepted: 09/02/2011] [Indexed: 11/10/2022] Open
Abstract
Pantothenate kinase-associated neurodegeneration (PKAN is a neurodegenerative disease with unresolved pathophysiology. Previously, we observed reduced Coenzyme A levels in a Drosophila model for PKAN. Coenzyme A is required for acetyl-Coenzyme A synthesis and acyl groups from the latter are transferred to lysine residues of proteins, in a reaction regulated by acetyltransferases. The tight balance between acetyltransferases and their antagonistic counterparts histone deacetylases is a well-known determining factor for the acetylation status of proteins. However, the influence of Coenzyme A levels on protein acetylation is unknown. Here we investigate whether decreased levels of the central metabolite Coenzyme A induce alterations in protein acetylation and whether this correlates with specific phenotypes of PKAN models. We show that in various organisms proper Coenzyme A metabolism is required for maintenance of histone- and tubulin acetylation, and decreased acetylation of these proteins is associated with an impaired DNA damage response, decreased locomotor function and decreased survival. Decreased protein acetylation and the concurrent phenotypes are partly rescued by pantethine and HDAC inhibitors, suggesting possible directions for future PKAN therapy development.
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Affiliation(s)
- Katarzyna Siudeja
- Department of Cell Biology, Radiation and Stress Cell Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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20
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Polster B, Crosier M, Lindsay S, Hayflick S. Expression of PLA2G6 in human fetal development: Implications for infantile neuroaxonal dystrophy. Brain Res Bull 2010; 83:374-9. [PMID: 20813170 DOI: 10.1016/j.brainresbull.2010.08.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Revised: 08/17/2010] [Accepted: 08/24/2010] [Indexed: 12/22/2022]
Abstract
Mutations in PLA2G6, which encodes calcium-independent phospholipase A(2) group VIA (iPLA2-VIA), underlie the autosomal recessive disorder infantile neuroaxonal dystrophy (INAD). INAD typically presents in the first year of life, and leads to optic atrophy and psychomotor regression. We have examined PLA2G6 expression in early human embryonic development by in situ hybridization. At Carnegie Stage (CS) 19 (approximately 7 post-conception weeks [PCW]), strong expression is evident in the ventricular zone (VZ) of midbrain and forebrain suggestive of expression in neural stem and progenitor cells. At CS23 (8PCW) expression is also detectable in the VZ of the hindbrain and the subventricular zone (SVZ) of the developing neocortex, ganglionic eminences and diencephalon. By 9PCW strong expression in the post-mitotic cells of the cortical plate can be seen in the developing neocortex. In the eye, expression is seen in the lens and retina at all stages examined. PLA2G6 expression is also evident in the alar plate of the spinal cord, dorsal root ganglia, the retina and lens in the eye and several non-neuronal tissues, including developing bones, lung, kidney and gut. These findings suggest a role for PLA2G6 in neuronal proliferation throughout the developing brain and in maturing neurons in the cortical plate and hindbrain. Although widespread PLA2G6 expression is detected in neuronal tissues, the pattern shows dynamic changes with time and indicates that INAD pathogenesis may begin prior to birth.
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Affiliation(s)
- Brenda Polster
- Molecular and Medical Genetics, Oregon Health & Science University, 3181 SW Sam Jackson Park Rd., Portland, OR 97239, United States.
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21
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Szumowski J, Bas E, Gaarder K, Schwarz E, Erdogmus D, Hayflick S. Measurement of brain iron distribution in Hallevorden-Spatz syndrome. J Magn Reson Imaging 2010; 31:482-9. [PMID: 20099363 DOI: 10.1002/jmri.22031] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
PURPOSE To investigate spatial distribution of iron accumulation in the globus pallidus (GP) in patients with Hallevorden-Spatz syndrome (HSS) using phase imaging. We compared sensitivity of a phase imaging technique to relaxation rate measurement methods (R1,R2,R2*) for iron quantification. MATERIALS AND METHODS R1, R2, and R2* were measured in GP structure of the brain of eight pantothenate kinase-associated neurodegeneration (PKAN) patients and a healthy volunteer using a 3T magnetic resonance imaging (MRI) scanner. The phase of gradient-echo images was preprocessed to eliminate phase 2pi wrapping and filtered to remove phase background variations. Phase gap across GP structure was used as a metric for iron effects quantification. RESULTS Among the relaxation rates the most sensitive to iron accumulation was the R2* rate. The R1 and R2 rates demonstrated only small variations in this group of subjects. Up to an order of magnitude phase gap changes were measured between one PKAN patient and an age-matched healthy volunteer. Assuming that phase gap differences scale linearly with iron concentration we estimate that up to 2 mg Fe/g ww accumulates in GP of these patients. CONCLUSION Our results demonstrate significantly higher sensitivity of the phase measurements for quantitative assessment of iron concentration compared to the relaxation rate measurements. Phase measurements could potentially be used for monitoring a progression and a response to therapy in PKAN.
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Affiliation(s)
- Jerzy Szumowski
- Oregon Health Science University Department of Radiology Portland, Oregon, USA.
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22
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Carrilho I, Santos M, Guimarães A, Teixeira J, Chorão R, Martins M, Dias C, Gregory A, Westaway S, Nguyen T, Hayflick S, Barbot C. Infantile neuroaxonal dystrophy: what's most important for the diagnosis? Eur J Paediatr Neurol 2008; 12:491-500. [PMID: 18359254 DOI: 10.1016/j.ejpn.2008.01.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2007] [Revised: 12/27/2007] [Accepted: 01/03/2008] [Indexed: 11/17/2022]
Abstract
BACKGROUND AND AIMS Infantile neuroaxonal dystrophy is a rare neurodegenerative disorder, with onset in the first 2 years of life. Mutations in the PLA2G6 gene were identified in patients with infantile neuroaxonal dystrophy. Our purpose was to review clinical, neurophysiologic, neuroradiologic and neuropathological features of our patients in order to identify the earliest signs of disease. We also correlate these data with the genotype in the mutation positive patients. METHODS We reviewed the clinical reports, neurophysiologic and neuropathological studies and brain imaging of our patients. In five patients molecular analysis of the PLA2G6 gene was performed. RESULTS We report 10 patients with infantile neuroaxonal dystrophy. Earliest symptoms presented between 6 and 18 months of age. The first manifestations were arrest in the acquisition of milestones or regression. The first neurological signs were generalized hypotonia and pyramidal signs. Fast rhythms on EEG were observed in all patients. Brain imaging studies showed cerebellar atrophy in all patients, with signal hyperintensity in the cerebellar cortex on T2-weighted images in five. All cases had characteristic axonal spheroids on skin biopsy. Mutations in the PLA2G6 gene were identified in the five patients studied. Three of them had the same homozygous mutations 2370T> G, Y790X. CONCLUSIONS Though mutations were detected in the patients studied, a clear genotype-phenotype correlation could not be ascertained. In the appropriate clinical context, characteristic brain imaging and fast rhythms on EEG can support the decision to perform molecular analysis and avoid skin biopsy to confirm diagnosis.
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Affiliation(s)
- Inês Carrilho
- Department of Child Neurology, Hospital de Crianças Maria Pia, Rua da Boavista, 827, 4050-111 Porto, Portugal.
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23
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Freeman K, Gregory A, Turner A, Blasco P, Hogarth P, Hayflick S. Intellectual and adaptive behaviour functioning in pantothenate kinase-associated neurodegeneration. J Intellect Disabil Res 2007; 51:417-26. [PMID: 17493025 PMCID: PMC2099459 DOI: 10.1111/j.1365-2788.2006.00889.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
BACKGROUND Pantothenate kinase-associated neurodegeneration (PKAN), an extremely rare autosomal recessive disorder resulting in iron accumulation in the brain, has a diverse phenotypic expression. Based on limited case studies of one or two patients, intellectual impairment is considered part of PKAN. Investigations of cognitive functioning have utilized specific neuropsychological tests, without attention to general intellectual skills or adaptive behaviour. METHODS Sixteen individuals with PKAN completed measures of global intellectual functioning, and participants or care providers completed measures of adaptive behaviour skills and day-to-day functional limitations. Clinicians provided global ratings of condition severity. RESULTS Testing with standardized measures documented varied phenotypic expression, with general cognitive skills and adaptive behaviour ranging from high average to well below average. Age of disease onset correlated with measures of intellectual functioning, adaptive functioning and disease severity. CONCLUSIONS Findings support previously described clinical impressions of varied cognitive impairment and the association between age of onset and impairment. Further, they add important information regarding the natural history of the disease and suggest assessment strategies for use in treatment trials.
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Affiliation(s)
- K Freeman
- Child Development and Rehabilitation Center, Portland, OR, USA.
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24
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Hayflick S, Westaway S. Pantothenate kinase 2 mutation without 'eye-of-the-tiger' sign. Pediatr Radiol 2006; 36:1329; author reply 1330. [PMID: 17021717 DOI: 10.1007/s00247-006-0309-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2006] [Accepted: 07/09/2006] [Indexed: 11/28/2022]
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25
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Affiliation(s)
- J Emery
- General Practice and Primary Care Research Unit, Department of Public Health and Primary Care, University of Cambridge, Institute of Public Health, Cambridge CB2 2SR, UK.
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26
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Mules EH, Hayflick S, Miller CS, Reynolds LW, Thomas GH. Six novel deleterious and three neutral mutations in the gene encoding the alpha-subunit of hexosaminidase A in non-Jewish individuals. Am J Hum Genet 1992; 50:834-41. [PMID: 1532289 PMCID: PMC1682641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Initial investigations demonstrated that only 3/34 "Tay-Sachs chromosomes" in 22 unrelated, non-Jewish patients or carriers of some form of GM2-gangliosidosis (7 black and 15 non-Jewish Caucasian) had either of the two mutations commonly found in the Jewish population. To determine the nature and incidence of the alterations in this non-Jewish population we have utilized PCR, single-strand conformation polymorphism analysis and sequencing to detect new mutations in genomic DNA. Fourteen primer sets have been utilized to analyze 80% of the coding region and 23/26 splice sites of the gene coding for the alpha chain of hexosaminidase A. Presumed deleterious mutations were discovered in 17/34 chromosomes believed to be carrying a beta-hexosaminidase A alpha-subunit gene mutation. Ten had abnormalities which have been described previously. In the remaining 24 Tay-Sachs disease alleles, six novel mutations predicted to be deleterious were discovered. These include two small deletions (a single-base frameshift and a three-base deletion removing an amino acid), two different nonsense mutations, an initiation codon mutation (ATG----GTG), and a missense mutation (Arg499Cys) in a highly conserved residue. In addition, three presumed nondeleterious mutations were found.
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Affiliation(s)
- E H Mules
- Genetics Laboratory, Kennedy Institute, Baltimore, MD 21205
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27
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Abstract
An infant with a diagnosis of acute infantile cardiomyopathy was subsequently shown to have mucopolysaccharidosis VI. The mucopolysaccharidoses should be included in the differential diagnosis of infantile cardiomyopathy.
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Affiliation(s)
- S Hayflick
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland
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28
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Mules EH, Hayflick S, Dowling CE, Kelly TE, Akerman BR, Gravel RA, Thomas GH. Molecular basis of hexosaminidase A deficiency and pseudodeficiency in the Berks County Pennsylvania Dutch. Hum Mutat 1992; 1:298-302. [PMID: 1301937 DOI: 10.1002/humu.1380010406] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Following the birth of two infants with Tay-Sachs disease (TSD), a non-Jewish, Pennsylvania Dutch kindred was screened for TSD carriers using the biochemical assay. A high frequency of individuals who appeared to be TSD heterozygotes was detected (Kelly et al., 1975). Clinical and biochemical evidence suggested that the increased carrier frequency was due to at least two altered alleles for the hexosaminidase A alpha-subunit. We now report two mutant alleles in this Pennsylvania Dutch kindred, and one polymorphism. One allele, reported originally in a French TSD patient (Akli et al., 1991), is a GT-->AT transition at the donor splice-site of intron 9. The second, a C-->T transition at nucleotide 739 (Arg247Trp), has been shown by Triggs-Raine et al. (1992) to be a clinically benign "pseudodeficient" allele associated with reduced enzyme activity against artificial substrate. Finally, a polymorphism [G-->A (759)], which leaves valine at codon 253 unchanged, is described.
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Affiliation(s)
- E H Mules
- Genetics Laboratory, Kennedy Krieger Institute, Baltimore, Maryland 21205
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29
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Hayflick S, Johnson RG, Carty SE, Scarpa A. Kinetic and quantitative measurements of catecholamine transport in chromaffin ghosts using a glassy carbon electrode. Anal Biochem 1982; 126:58-66. [PMID: 7181117 DOI: 10.1016/0003-2697(82)90108-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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30
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Johnson RG, Hayflick S, Carty SE, Scarpa A. Net uptake of catecholamines into isolated chromaffin granules demonstrated by a novel polarographic technique. FEBS Lett 1982; 141:63-7. [PMID: 7084478 DOI: 10.1016/0014-5793(82)80017-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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31
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Johnson RG, Carty SE, Hayflick S, Scarpa A. Mechanisms of accumulation of tyramine, metaraminol, and isoproterenol in isolated chromaffin granules and ghosts. Biochem Pharmacol 1982; 31:815-23. [PMID: 7082350 DOI: 10.1016/0006-2952(82)90468-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The effects of the transmembrane pH gradient (delta pH) and the transmembrane potential gradient (delta psi) on the uptake of several sympathomimetic amines were investigated, using bovine adrenal chromaffin granules isolated in isotonic sucrose. As previously described [R. Johnson and A. Scarpa, J. Biol. Chem. 254 3750 (1979)], freshly isolated chromaffin granules maintain an intragranular pH of 5.5 as measured by [14C] methylamine distribution and, in the presence of ATP, generate a delta psi of 80 mV, positive inside, as measured by [14C] methylamine distribution. When tyramine, metaraminol, and isoproterenol (1-50 mM) were added to well-buffered suspensions of granules at pH 7.0, a dose-related alkalinization of the granule interior was observed. Study of the time-resolved influx of the same amines labeled radiochemically (5-21 microM) revealed that all the amines were accumulated against an apparent concentration gradient. However, while accumulation of [14C] serotonin and [3H] isoproterenol was totally inhibited by reserpine, [14C] tryramine accumulation was inhibited by only 60% and [14C[ metaraminol uptake was unaffected. The ATP-dependent generation of a delta psi produced a stimulation of amine uptake in the order: serotonin greater than isoproterenol greater than tyramine; metaraminol accumulation was not enhanced by ATP addition. The relationship between the electrochemical proton gradient (delta micro H+) and the electrochemical gradient for each of the sympathomimetic amines (delta micro A) was investigated utilizing chromaffin ghosts devoid of endogenous matrix gradients or components. All amines were accumulated in the presence of delta pH alone. In the presence of delta psi alone, [14C] serotonin, (14C] tyramine, and [3H] isoproterenol were accumulated, but no [3H] metaraminol uptake was demonstrable. The results indicate that serotonin and isoproterenol accumulated in isolated chromaffin granules and ghosts via a reserpine-sensitive mechanism, driven by the magnitude of the electrochemical proton gradient. Conversely, metaraminol permeated the membrane of the chromaffin granule through the apolar lipid phase and distributed according to the delta pH alone. Tyramine uptake proceeded by both mechanisms. The implications of the mechanism of accumulation of these potent physiologic and pharmacologic agents for their in vivo action are discussed.
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