1
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Kluge A, Borsche M, Streubel-Gallasch L, Gül T, Schaake S, Balck A, Prasuhn J, Campbell P, Morris HR, Schapira AH, Lohmann K, Brüggemann N, Rakovic A, Seibler P, Başak AN, Berg D, Klein C. α-Synuclein Pathology in PRKN-Linked Parkinson's Disease: New Insights from a Blood-Based Seed Amplification Assay. Ann Neurol 2024; 95:1173-1177. [PMID: 38546204 DOI: 10.1002/ana.26917] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 03/04/2024] [Accepted: 03/06/2024] [Indexed: 05/18/2024]
Abstract
Pathogenic variants in PRKN cause early-onset Parkinson's disease (PD), while the role of alpha-synuclein in PRKN-PD remains uncertain. One study performed a blood-based alpha-synuclein seed amplification assay (SAA) in PRKN-PD, not detecting seed amplification in 17 PRKN-PD patients. By applying a methodologically different SAA focusing on neuron-derived extracellular vesicles, we demonstrated alpha-synuclein seed amplification in 8 of 13 PRKN-PD patients, challenging the view of PRKN-PD as a non-synucleinopathy. Moreover, we performed blinded replication of the neuron-derived extracellular vesicles-dependent SAA in idiopathic PD patients and healthy controls. In conclusion, blood-based neuron-derived extracellular vesicles-dependent SAA represents a promising biomarker to elucidate the underpinnings of (monogenic) PD. ANN NEUROL 2024;95:1173-1177.
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Affiliation(s)
- Annika Kluge
- Department of Neurology, University Hospital Schleswig-Holstein Campus Kiel and Kiel University, Kiel, Germany
| | - Max Borsche
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
- Department of Neurology, University Hospital Schleswig-Holstein Campus Lübeck and University of Lübeck, Lübeck, Germany
| | | | - Tuğçe Gül
- Neurodegeneration Research Laboratory (NDAL), Research Center for Translational Medicine (KUTTAM), University School of Medicine, Istanbul, Turkey
| | - Susen Schaake
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Alexander Balck
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
- Department of Neurology, University Hospital Schleswig-Holstein Campus Lübeck and University of Lübeck, Lübeck, Germany
| | - Jannik Prasuhn
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
- Department of Neurology, University Hospital Schleswig-Holstein Campus Lübeck and University of Lübeck, Lübeck, Germany
| | - Philip Campbell
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London, UK
- UCL Movement Disorders Center, University College London, London, UK
| | - Huw R Morris
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London, UK
- UCL Movement Disorders Center, University College London, London, UK
| | - Anthony H Schapira
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London, UK
- UCL Movement Disorders Center, University College London, London, UK
| | - Katja Lohmann
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Norbert Brüggemann
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
- Department of Neurology, University Hospital Schleswig-Holstein Campus Lübeck and University of Lübeck, Lübeck, Germany
| | | | - Philip Seibler
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - A Nazlı Başak
- Neurodegeneration Research Laboratory (NDAL), Research Center for Translational Medicine (KUTTAM), University School of Medicine, Istanbul, Turkey
| | - Daniela Berg
- Department of Neurology, University Hospital Schleswig-Holstein Campus Kiel and Kiel University, Kiel, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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2
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Gomez Ramos B, Ohnmacht J, de Lange N, Valceschini E, Ginolhac A, Catillon M, Ferrante D, Rakovic A, Halder R, Massart F, Arena G, Antony P, Bolognin S, Klein C, Krause R, Schulz MH, Sauter T, Krüger R, Sinkkonen L. Multiomics analysis identifies novel facilitators of human dopaminergic neuron differentiation. EMBO Rep 2024; 25:254-285. [PMID: 38177910 PMCID: PMC10897179 DOI: 10.1038/s44319-023-00024-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 11/17/2023] [Accepted: 11/23/2023] [Indexed: 01/06/2024] Open
Abstract
Midbrain dopaminergic neurons (mDANs) control voluntary movement, cognition, and reward behavior under physiological conditions and are implicated in human diseases such as Parkinson's disease (PD). Many transcription factors (TFs) controlling human mDAN differentiation during development have been described, but much of the regulatory landscape remains undefined. Using a tyrosine hydroxylase (TH) human iPSC reporter line, we here generate time series transcriptomic and epigenomic profiles of purified mDANs during differentiation. Integrative analysis predicts novel regulators of mDAN differentiation and super-enhancers are used to identify key TFs. We find LBX1, NHLH1 and NR2F1/2 to promote mDAN differentiation and show that overexpression of either LBX1 or NHLH1 can also improve mDAN specification. A more detailed investigation of TF targets reveals that NHLH1 promotes the induction of neuronal miR-124, LBX1 regulates cholesterol biosynthesis, and NR2F1/2 controls neuronal activity.
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Affiliation(s)
- Borja Gomez Ramos
- Department of Life Sciences and Medicine (DLSM), University of Luxembourg, L-4362, Belvaux, Luxembourg
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Jochen Ohnmacht
- Department of Life Sciences and Medicine (DLSM), University of Luxembourg, L-4362, Belvaux, Luxembourg
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Nikola de Lange
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Elena Valceschini
- Department of Life Sciences and Medicine (DLSM), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Aurélien Ginolhac
- Department of Life Sciences and Medicine (DLSM), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Marie Catillon
- Department of Life Sciences and Medicine (DLSM), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Daniele Ferrante
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Aleksandar Rakovic
- Institute of Neurogenetics, University of Lübeck, 23538, Lübeck, Germany
| | - Rashi Halder
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - François Massart
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Giuseppe Arena
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Paul Antony
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Silvia Bolognin
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, 23538, Lübeck, Germany
| | - Roland Krause
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Marcel H Schulz
- Institute for Cardiovascular Regeneration, Goethe University, 60590, Frankfurt, Germany
- German Centre for Cardiovascular Research, Partner site Rhein-Main, 60590, Frankfurt am Main, Germany
- Cardio-Pulmonary Institute, Goethe University, Frankfurt am Main, Germany
| | - Thomas Sauter
- Department of Life Sciences and Medicine (DLSM), University of Luxembourg, L-4362, Belvaux, Luxembourg
| | - Rejko Krüger
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, L-4362, Belvaux, Luxembourg
- Centre Hospitalier de Luxembourg (CHL), L-1210, Luxembourg, Luxembourg
- Luxembourg Institute of Health (LIH), L-1445, Luxembourg, Luxembourg
| | - Lasse Sinkkonen
- Department of Life Sciences and Medicine (DLSM), University of Luxembourg, L-4362, Belvaux, Luxembourg.
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3
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Gallinat A, Rakovic A, Klein C, Badimon L. DJ-1 regulates mitochondrial gene expression during ischemia and reperfusion. Free Radic Biol Med 2022; 193:430-436. [PMID: 36341940 DOI: 10.1016/j.freeradbiomed.2022.10.315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 09/16/2022] [Revised: 10/10/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022]
Abstract
The early-onset Parkinson's disease protein DJ-1 is a multifunctional protein that plays a protective role against ischemia and reperfusion (I/R) injury and oxidative stress. Despite lacking a canonical RNA-binding domain DJ-1 exhibits RNA-binding activity and multiple transcripts have been identified. However, no functional characterization has been provided to date. Here, we have investigated the DJ-1-interacting transcripts, as well as the role of DJ-1 RNA-binding activity during ischemia and reperfusion. Among the identified DJ-1-interacting transcripts, we have distinguished a significant enrichment of mRNAs encoding mitochondrial proteins. The effects of DJ-1 depletion on mitochondrial protein expression and mitochondrial morphology were investigated using a CRISPR/Cas9 generated DJ-1 knockout (DJ-1KO) cell model. DJ-1 depletion resulted in increased MTND2 protein expression in resting cells; however, after exposure to I/R, MTND2 levels were significantly reduced with respect to wild type cells. Increased mitochondrial fission was consistently found in DJ-1KO cells after I/R exposure. MTND2 transcript binding to DJ-1 was increased during ischemia. Our results indicate that the RNA-binding activity of DJ-1 shield mitochondrial transcripts from oxidative damage.
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Affiliation(s)
- Alex Gallinat
- Cardiovascular Program-ICCC, IR-Hospital Santa Creu i Sant Pau, IIB-Sant Pau, Barcelona, Spain; Universitat Autònoma de Barcelona (UAB), Barcelona, Spain
| | | | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Lina Badimon
- Cardiovascular Program-ICCC, IR-Hospital Santa Creu i Sant Pau, IIB-Sant Pau, Barcelona, Spain; CIBERCV-Instituto de Salud Carlos III, Madrid, Spain; UAB-Chair Cardiovascular Research, Barcelona, Spain.
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4
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Reyes CJ, Asano K, Todd PK, Klein C, Rakovic A. Repeat-Associated Non-AUG Translation of AGAGGG Repeats that Cause X-Linked Dystonia-Parkinsonism. Mov Disord 2022; 37:2284-2289. [PMID: 35971992 DOI: 10.1002/mds.29183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 07/05/2022] [Accepted: 07/21/2022] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND X-linked dystonia-parkinsonism (XDP) is a neurodegenerative disorder caused by the intronic insertion of a SINE-VNTR-Alu (SVA) retrotransposon carrying an (AGAGGG)n repeat expansion in the TAF1 gene. The molecular mechanisms by which this mutation causes neurodegeneration remain elusive. OBJECTIVES We investigated whether (AGAGGG)n repeats undergo repeat-associated non-AUG (RAN) translation, a pathogenic mechanism common among repeat expansion diseases. METHODS XDP-specific RAN translation reporter plasmids were generated, transfected in HEK293 cells, and putative dipeptide repeat proteins (DPRs) were detected by Western blotting. Immunocytochemistry was performed in COS-7 cells to determine the subcellular localization of one DPR. RESULTS We detected putative DPRs from two reading frames, supporting the translation of poly-(Glu-Gly) and poly-(Arg-Glu) species. XDP RAN translation initiates within the (AGAGGG)n sequence and poly-(Glu-Gly) DPRs formed nuclear inclusions in transfected cells. CONCLUSIONS In summary, our work provides the first in-vitro proof of principle that the XDP-linked (AGAGGG)n repeat expansions can undergo RAN translation. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
| | - Katsura Asano
- Molecular Cellular and Developmental Biology Program, Division of Biology, Kansas State University, Manhattan, Kansas, USA
- Laboratory of Translational Control Study, Graduate School of Integrated Sciences for Life, Hiroshima University, Hiroshima, Japan
- Hiroshima Research Center for Healthy Aging, Hiroshima University, Hiroshima, Japan
| | - Peter K Todd
- Department of Neurology, University of Michigan Medical School, Ann Arbor, Michigan, USA
- Veterans Affairs Medical Center, Ann Arbor, Michigan, USA
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5
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Seibler P, Rakovic A. Patient-derived cells – an irreplaceable tool for research of reduced penetrance in movement disorders. MED GENET-BERLIN 2022. [DOI: 10.1515/medgen-2022-2133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Movement disorders comprise a clinically, pathologically, and genetically heterogeneous group of diseases associated with the phenomenon of reduced penetrance. Penetrance refers to the likelihood that a clinical condition will occur when a particular genotype is present. Elucidating the cause of reduced penetrance may contribute to more personalized medicine by identifying genetic factors that may prevent individuals from developing disease. Therefore, patient material becomes an irreplaceable resource in this approach. It is needed to identify genetic modifiers of the disease in the first place and to subsequently elucidate underlying mechanisms in endogenous human cell models that provide the entire genetic background.
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Affiliation(s)
- Philip Seibler
- Institute of Neurogenetics , University of Lübeck , Lübeck , Germany
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6
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Diaw SH, Ganos C, Zittel S, Plötze-Martin K, Kulikovskaja L, Vos M, Westenberger A, Rakovic A, Lohmann K, Dulovic-Mahlow M. Mutant WDR45 Leads to Altered Ferritinophagy and Ferroptosis in β-Propeller Protein-Associated Neurodegeneration. Int J Mol Sci 2022; 23:ijms23179524. [PMID: 36076926 PMCID: PMC9455908 DOI: 10.3390/ijms23179524] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/16/2022] [Accepted: 08/19/2022] [Indexed: 12/04/2022] Open
Abstract
Beta-propeller protein-associated neurodegeneration (BPAN) is a subtype of neurodegeneration with brain iron accumulation (NBIA) caused by loss-of-function variants in WDR45. The underlying mechanism of iron accumulation in WDR45 deficiency remains elusive. We established a primary skin fibroblast culture of a new BPAN patient with a missense variant p.(Asn61Lys) in WDR45 (NM_007075.3: c.183C>A). The female patient has generalized dystonia, anarthria, parkinsonism, spasticity, stereotypies, and a distinctive cranial MRI with generalized brain atrophy, predominantly of the cerebellum. For the functional characterization of this variant and to provide a molecular link of WDR45 and iron accumulation, we looked for disease- and variant-related changes in the patient’s fibroblasts by qPCR, immunoblotting and immunofluorescence comparing to three controls and a previously reported WDR45 patient. We demonstrated molecular changes in mutant cells comprising an impaired mitochondrial network, decreased levels of lysosomal proteins and enzymes, and altered autophagy, confirming the pathogenicity of the variant. Compared to increased levels of the ferritinophagy marker Nuclear Coactivator 4 (NCOA4) in control cells upon iron treatment, patients’ cells revealed unchanged NCOA4 protein levels, indicating disturbed ferritinophagy. Additionally, we observed abnormal protein levels of markers of the iron-dependent cell death ferroptosis in patients’ cells. Altogether, our data suggests that WDR45 deficiency affects ferritinophagy and ferroptosis, consequentially disturbing iron recycling.
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Affiliation(s)
| | - Christos Ganos
- Department of Neurology, Charité—University Medicine, 10117 Berlin, Germany
| | - Simone Zittel
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | | | | | - Melissa Vos
- Institute of Neurogenetics, University of Lübeck, 23562 Lübeck, Germany
| | - Ana Westenberger
- Institute of Neurogenetics, University of Lübeck, 23562 Lübeck, Germany
| | | | - Katja Lohmann
- Institute of Neurogenetics, University of Lübeck, 23562 Lübeck, Germany
- Correspondence:
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7
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Wasner K, Smajic S, Ghelfi J, Delcambre S, Prada-Medina CA, Knappe E, Arena G, Mulica P, Agyeah G, Rakovic A, Boussaad I, Badanjak K, Ohnmacht J, Gérardy JJ, Takanashi M, Trinh J, Mittelbronn M, Hattori N, Klein C, Antony P, Seibler P, Spielmann M, Pereira SL, Grünewald A. Parkin Deficiency Impairs Mitochondrial DNA Dynamics and Propagates Inflammation. Mov Disord 2022; 37:1405-1415. [PMID: 35460111 DOI: 10.1002/mds.29025] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 03/07/2022] [Accepted: 03/27/2022] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND Mutations in the E3 ubiquitin ligase parkin cause autosomal recessive Parkinson's disease (PD). Together with PTEN-induced kinase 1 (PINK1), parkin regulates the clearance of dysfunctional mitochondria. New mitochondria are generated through an interplay of nuclear- and mitochondrial-encoded proteins, and recent studies suggest that parkin influences this process at both levels. In addition, parkin was shown to prevent mitochondrial membrane permeability, impeding mitochondrial DNA (mtDNA) escape and subsequent neuroinflammation. However, parkin's regulatory roles independent of mitophagy are not well described in patient-derived neurons. OBJECTIVES We sought to investigate parkin's role in preventing neuronal mtDNA dyshomeostasis, release, and glial activation at the endogenous level. METHODS We generated induced pluripotent stem cell (iPSC)-derived midbrain neurons from PD patients with parkin (PRKN) mutations and healthy controls. Live-cell imaging, proteomic, mtDNA integrity, and gene expression analyses were employed to investigate mitochondrial biogenesis and genome maintenance. To assess neuroinflammation, we performed single-nuclei RNA sequencing in postmortem tissue and quantified interleukin expression in mtDNA/lipopolysaccharides (LPS)-treated iPSC-derived neuron-microglia co-cultures. RESULTS Neurons from patients with PRKN mutations revealed deficits in the mitochondrial biogenesis pathway, resulting in mtDNA dyshomeostasis. Moreover, the energy sensor sirtuin 1, which controls mitochondrial biogenesis and clearance, was downregulated in parkin-deficient cells. Linking mtDNA disintegration to neuroinflammation, in postmortem midbrain with PRKN mutations, we confirmed mtDNA dyshomeostasis and detected an upregulation of microglia overexpressing proinflammatory cytokines. Finally, parkin-deficient neuron-microglia co-cultures elicited an enhanced immune response when exposed to mtDNA/LPS. CONCLUSIONS Our findings suggest that parkin coregulates mitophagy, mitochondrial biogenesis, and mtDNA maintenance pathways, thereby protecting midbrain neurons from neuroinflammation and degeneration. © 2022 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Kobi Wasner
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette
| | - Semra Smajic
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette
| | - Jenny Ghelfi
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette
| | - Sylvie Delcambre
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette
| | | | - Evelyn Knappe
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Giuseppe Arena
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette
| | - Patrycja Mulica
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette
| | - Gideon Agyeah
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette
| | | | - Ibrahim Boussaad
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette.,Disease Modeling and Screening Platform, Luxembourg Centre of Systems Biomedicine, University of Luxembourg & Luxembourg Institute of Health, Luxembourg
| | - Katja Badanjak
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette
| | - Jochen Ohnmacht
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette.,Department of Life Science and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jean-Jacques Gérardy
- National Center of Pathology, Laboratoire National de Santé, Dudelange, Luxembourg
| | | | - Joanne Trinh
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Michel Mittelbronn
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette.,National Center of Pathology, Laboratoire National de Santé, Dudelange, Luxembourg.,Luxembourg Center of Neuropathology, Dudelange, Luxembourg.,Department of Cancer Research, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | | | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Paul Antony
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette.,Disease Modeling and Screening Platform, Luxembourg Centre of Systems Biomedicine, University of Luxembourg & Luxembourg Institute of Health, Luxembourg
| | - Philip Seibler
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Malte Spielmann
- Max Planck Institute for Molecular Genetics, Berlin, Germany.,Institute of Human Genetics, University of Lübeck, Lübeck, Germany
| | - Sandro L Pereira
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette.,Department of Neurology, Juntendo University, Tokyo, Japan
| | - Anne Grünewald
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette.,Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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8
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Rakovic A, Voß D, Vulinovic F, Meier B, Hellberg AK, Nau C, Klein C, Leipold E. Electrophysiological Properties of Induced Pluripotent Stem Cell-Derived Midbrain Dopaminergic Neurons Correlate With Expression of Tyrosine Hydroxylase. Front Cell Neurosci 2022; 16:817198. [PMID: 35401116 PMCID: PMC8983830 DOI: 10.3389/fncel.2022.817198] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 02/28/2022] [Indexed: 11/13/2022] Open
Abstract
Induced pluripotent stem cell (iPSC)-based generation of tyrosine hydroxylase-positive (TH+) dopaminergic neurons (DNs) is a powerful method for creating patient-specific in vitro models to elucidate mechanisms underlying Parkinson’s disease (PD) at the cellular and molecular level and to perform drug screening. However, currently available differentiation paradigms result in highly heterogeneous cell populations, often yielding a disappointing fraction (<50%) of the PD-relevant TH+ DNs. To facilitate the targeted analysis of this cell population and to characterize their electrophysiological properties, we employed CRISPR/Cas9 technology and generated an mCherry-based human TH reporter iPSC line. Subsequently, reporter iPSCs were subjected to dopaminergic differentiation using either a “floor plate protocol” generating DNs directly from iPSCs or an alternative method involving iPSC-derived neuronal precursors (NPC-derived DNs). To identify the strategy with the highest conversion efficiency to mature neurons, both cultures were examined for a period of 8 weeks after triggering neuronal differentiation by means of immunochemistry and single-cell electrophysiology. We confirmed that mCherry expression correlated with the expression of endogenous TH and that genetic editing did neither affect the differentiation process nor the endogenous TH expression in iPSC- and NPC-derived DNs. Although both cultures yielded identical proportions of TH+ cells (≈30%), whole-cell patch-clamp experiments revealed that iPSC-derived DNs gave rise to larger currents mediated by voltage-gated sodium and potassium channels, showed a higher degree of synaptic activity, and fired trains of mature spontaneous action potentials more frequently compared to NPC-derived DNs already after 2 weeks in differentiation. Moreover, spontaneous action potential firing was more frequently detected in TH+ neurons compared to the TH– cells, providing direct evidence that these two neuronal subpopulations exhibit different intrinsic electrophysiological properties. In summary, the data reveal substantial differences in the electrophysiological properties of iPSC-derived TH+ and TH– neuronal cell populations and that the “floor plate protocol” is particularly efficient in generating electrophysiologically mature TH+ DNs, which are the most vulnerable neuronal subtype in PD.
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Affiliation(s)
| | - Dorothea Voß
- Department of Anesthesiology and Intensive Care, Center of Brain, Behavior and Metabolism (CBBM), University of Lübeck, Lübeck, Germany
| | - Franca Vulinovic
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Britta Meier
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Ann-Katrin Hellberg
- Department of Anesthesiology and Intensive Care, Center of Brain, Behavior and Metabolism (CBBM), University of Lübeck, Lübeck, Germany
| | - Carla Nau
- Department of Anesthesiology and Intensive Care, Center of Brain, Behavior and Metabolism (CBBM), University of Lübeck, Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Enrico Leipold
- Department of Anesthesiology and Intensive Care, Center of Brain, Behavior and Metabolism (CBBM), University of Lübeck, Lübeck, Germany
- *Correspondence: Enrico Leipold,
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9
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Krajka V, Vulinovic F, Genova M, Tanzer K, Jijumon AS, Bodakuntla S, Tennstedt S, Mueller-Fielitz H, Meier B, Janke C, Klein C, Rakovic A. H-ABC- and dystonia-causing TUBB4A mutations show distinct pathogenic effects. Sci Adv 2022; 8:eabj9229. [PMID: 35275727 PMCID: PMC8916731 DOI: 10.1126/sciadv.abj9229] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
Mutations in the brain-specific β-tubulin 4A (TUBB4A) gene cause a broad spectrum of diseases, ranging from dystonia (DYT-TUBB4A) to hypomyelination with atrophy of the basal ganglia and cerebellum (H-ABC). Currently, the mechanisms of how TUBB4A variants lead to this pleiotropic manifestation remain elusive. Here, we investigated whether TUBB4A mutations causing either DYT-TUBB4A (p.R2G and p.Q424H) or H-ABC (p.R2W and p.D249N) exhibit differential effects at the molecular and cellular levels. Using live-cell imaging of disease-relevant oligodendrocytes and total internal reflection fluorescence microscopy of whole-cell lysates, we observed divergent impact on microtubule polymerization and microtubule integration, partially reflecting the observed pleiotropy. Moreover, in silico simulations demonstrated that the mutants rarely adopted a straight heterodimer conformation in contrast to wild type. In conclusion, for most of the examined variants, we deciphered potential molecular disease mechanisms that may lead to the diverse clinical manifestations and phenotype severity across and within each TUBB4A-related disease.
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Affiliation(s)
- Victor Krajka
- Institute of Neurogenetics, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany
- Institute of Microtechnology (IMT), Technische Universität Braunschweig, Braunschweig 38124, Germany
| | - Franca Vulinovic
- Institute of Neurogenetics, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany
| | - Mariya Genova
- Institut Curie, Université PSL, CNRS UMR3348, 91401 Orsay, France
- Université Paris-Saclay, CNRS UMR3348, 91401 Orsay, France
| | - Kerstin Tanzer
- Institute of Neurogenetics, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany
| | - A. S. Jijumon
- Institut Curie, Université PSL, CNRS UMR3348, 91401 Orsay, France
- Université Paris-Saclay, CNRS UMR3348, 91401 Orsay, France
| | - Satish Bodakuntla
- Institut Curie, Université PSL, CNRS UMR3348, 91401 Orsay, France
- Université Paris-Saclay, CNRS UMR3348, 91401 Orsay, France
| | - Stephanie Tennstedt
- Institute for Cardiogenetics, University of Lübeck, 23562 Lübeck, Germany
- DZHK (German Research Centre for Cardiovascular Research), partner site Hamburg/Lübeck/Kiel, 23562 Lübeck, Germany
- University Heart Center Lübeck, 23562 Lübeck, Germany
| | - Helge Mueller-Fielitz
- Institute for Experimental and Clinical Pharmacology and Toxicology, University of Lübeck, Ratzeburger Allee 160, 23562 Lübeck, Germany
| | - Britta Meier
- Institute of Neurogenetics, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany
| | - Carsten Janke
- Institut Curie, Université PSL, CNRS UMR3348, 91401 Orsay, France
- Université Paris-Saclay, CNRS UMR3348, 91401 Orsay, France
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany
| | - Aleksandar Rakovic
- Institute of Neurogenetics, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany
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10
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Pozojevic J, Algodon SM, Cruz JN, Trinh J, Brüggemann N, Laß J, Grütz K, Schaake S, Tse R, Yumiceba V, Kruse N, Schulz K, Sreenivasan VKA, Rosales RL, Jamora RDG, Diesta CCE, Matschke J, Glatzel M, Seibler P, Händler K, Rakovic A, Kirchner H, Spielmann M, Kaiser FJ, Klein C, Westenberger A. Transcriptional Alterations in X-Linked Dystonia–Parkinsonism Caused by the SVA Retrotransposon. Int J Mol Sci 2022; 23:ijms23042231. [PMID: 35216353 PMCID: PMC8875906 DOI: 10.3390/ijms23042231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/09/2022] [Accepted: 02/14/2022] [Indexed: 02/05/2023] Open
Abstract
X-linked dystonia–parkinsonism (XDP) is a severe neurodegenerative disorder that manifests as adult-onset dystonia combined with parkinsonism. A SINE-VNTR-Alu (SVA) retrotransposon inserted in an intron of the TAF1 gene reduces its expression and alters splicing in XDP patient-derived cells. As a consequence, increased levels of the TAF1 intron retention transcript TAF1-32i can be found in XDP cells as compared to healthy controls. Here, we investigate the sequence of the deep intronic region included in this transcript and show that it is also present in cells from healthy individuals, albeit in lower amounts than in XDP cells, and that it undergoes degradation by nonsense-mediated mRNA decay. Furthermore, we investigate epigenetic marks (e.g., DNA methylation and histone modifications) present in this intronic region and the spanning sequence. Finally, we show that the SVA evinces regulatory potential, as demonstrated by its ability to repress the TAF1 promoter in vitro. Our results enable a better understanding of the disease mechanisms underlying XDP and transcriptional alterations caused by SVA retrotransposons.
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Affiliation(s)
- Jelena Pozojevic
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
- Institute of Human Genetics, University of Lübeck, 23538 Lübeck, Germany; (V.Y.); (N.K.); (K.S.); (V.K.A.S.); (K.H.); (H.K.); (M.S.)
| | - Shela Marie Algodon
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
| | - Joseph Neos Cruz
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
| | - Joanne Trinh
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
| | - Norbert Brüggemann
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
- Department of Neurology, University Hospital Schleswig Holstein, 23538 Lübeck, Germany
| | - Joshua Laß
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
| | - Karen Grütz
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
| | - Susen Schaake
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
| | - Ronnie Tse
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
| | - Veronica Yumiceba
- Institute of Human Genetics, University of Lübeck, 23538 Lübeck, Germany; (V.Y.); (N.K.); (K.S.); (V.K.A.S.); (K.H.); (H.K.); (M.S.)
| | - Nathalie Kruse
- Institute of Human Genetics, University of Lübeck, 23538 Lübeck, Germany; (V.Y.); (N.K.); (K.S.); (V.K.A.S.); (K.H.); (H.K.); (M.S.)
| | - Kristin Schulz
- Institute of Human Genetics, University of Lübeck, 23538 Lübeck, Germany; (V.Y.); (N.K.); (K.S.); (V.K.A.S.); (K.H.); (H.K.); (M.S.)
| | - Varun K. A. Sreenivasan
- Institute of Human Genetics, University of Lübeck, 23538 Lübeck, Germany; (V.Y.); (N.K.); (K.S.); (V.K.A.S.); (K.H.); (H.K.); (M.S.)
| | - Raymond L. Rosales
- The Hospital Neuroscience Institute, Department of Neurology and Psychiatry and The FMS-Research Center for Health Sciences, University of Santo Tomas, Manila 1008, Philippines;
| | - Roland Dominic G. Jamora
- Department of Neurosciences, College of Medicine-Philippine General Hospital, University of the Philippines Manila, Manila 1000, Philippines;
| | - Cid Czarina E. Diesta
- Department of Neurosciences, Movement Disorders Clinic, Makati Medical Center, Makati City 1229, Philippines;
| | - Jakob Matschke
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (J.M.); (M.G.)
| | - Markus Glatzel
- Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (J.M.); (M.G.)
| | - Philip Seibler
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
| | - Kristian Händler
- Institute of Human Genetics, University of Lübeck, 23538 Lübeck, Germany; (V.Y.); (N.K.); (K.S.); (V.K.A.S.); (K.H.); (H.K.); (M.S.)
| | - Aleksandar Rakovic
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
| | - Henriette Kirchner
- Institute of Human Genetics, University of Lübeck, 23538 Lübeck, Germany; (V.Y.); (N.K.); (K.S.); (V.K.A.S.); (K.H.); (H.K.); (M.S.)
| | - Malte Spielmann
- Institute of Human Genetics, University of Lübeck, 23538 Lübeck, Germany; (V.Y.); (N.K.); (K.S.); (V.K.A.S.); (K.H.); (H.K.); (M.S.)
- Human Molecular Genomics Group, Max Planck Institute for Molecular Genetics, 14195 Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, 23538 Lübeck, Germany
| | - Frank J. Kaiser
- Institut für Humangenetik, Universitätsklinikum Essen, Universität Duisburg-Essen, 45147 Essen, Germany;
- Essener Zentrum für Seltene Erkrankungen, Universitätsmedizin Essen, 45147 Essen, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
- Correspondence: (C.K.); (A.W.)
| | - Ana Westenberger
- Institute of Neurogenetics, University of Lübeck, 23538 Lübeck, Germany; (J.P.); (S.M.A.); (J.N.C.); (J.T.); (N.B.); (J.L.); (K.G.); (S.S.); (R.T.); (P.S.); (A.R.)
- Correspondence: (C.K.); (A.W.)
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11
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Jarazo J, Barmpa K, Modamio J, Saraiva C, Sabaté-Soler S, Rosety I, Griesbeck A, Skwirblies F, Zaffaroni G, Smits LM, Su J, Arias-Fuenzalida J, Walter J, Gomez-Giro G, Monzel AS, Qing X, Vitali A, Cruciani G, Boussaad I, Brunelli F, Jäger C, Rakovic A, Li W, Yuan L, Berger E, Arena G, Bolognin S, Schmidt R, Schröder C, Antony PMA, Klein C, Krüger R, Seibler P, Schwamborn JC. Parkinson's Disease Phenotypes in Patient Neuronal Cultures and Brain Organoids Improved by 2-Hydroxypropyl-β-Cyclodextrin Treatment. Mov Disord 2021; 37:80-94. [PMID: 34637165 PMCID: PMC9291890 DOI: 10.1002/mds.28810] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 05/04/2021] [Revised: 09/07/2021] [Accepted: 09/10/2021] [Indexed: 12/13/2022] Open
Abstract
Background The etiology of Parkinson's disease (PD) is only partially understood despite the fact that environmental causes, risk factors, and specific gene mutations are contributors to the disease. Biallelic mutations in the phosphatase and tensin homolog (PTEN)‐induced putative kinase 1 (PINK1) gene involved in mitochondrial homeostasis, vesicle trafficking, and autophagy are sufficient to cause PD. Objectives We sought to evaluate the difference between controls' and PINK1 patients' derived neurons in their transition from neuroepithelial stem cells to neurons, allowing us to identify potential pathways to target with repurposed compounds. Methods Using two‐dimensional and three‐dimensional models of patients' derived neurons we recapitulated PD‐related phenotypes. We introduced the usage of midbrain organoids for testing compounds. Using Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/CRISPR‐associated protein 9 (Cas9), we corrected the point mutations of three patients' derived cells. We evaluated the effect of the selected compound in a mouse model. Results PD patient‐derived cells presented differences in their energetic profile, imbalanced proliferation, apoptosis, mitophagy, and a reduced differentiation efficiency to tyrosine hydroxylase positive (TH+) neurons compared to controls' cells. Correction of a patient's point mutation ameliorated the metabolic properties and neuronal firing rates as well as reversing the differentiation phenotype, and reducing the increased astrocytic levels. Treatment with 2‐hydroxypropyl‐β‐cyclodextrin increased the autophagy and mitophagy capacity of neurons concomitant with an improved dopaminergic differentiation of patient‐specific neurons in midbrain organoids and ameliorated neurotoxicity in a mouse model. Conclusion We show that treatment with a repurposed compound is sufficient for restoring the impaired dopaminergic differentiation of PD patient‐derived cells. © 2021 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society
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Affiliation(s)
- Javier Jarazo
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg.,OrganoTherapeutics société à responsabilité limitée simplifiée (SARL-S), Esch-sur-Alzette, Luxembourg
| | - Kyriaki Barmpa
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jennifer Modamio
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Cláudia Saraiva
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Sònia Sabaté-Soler
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Isabel Rosety
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | | | | | - Gaia Zaffaroni
- Institute for Globally Distributed Open Research and Education, Gothenburg, Sweden
| | - Lisa M Smits
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jihui Su
- Institute of Health Sciences, China Medical University, Shenyang, China
| | - Jonathan Arias-Fuenzalida
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jonas Walter
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Gemma Gomez-Giro
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Anna S Monzel
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Xiaobing Qing
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Armelle Vitali
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Gerald Cruciani
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg.,Disease Modeling and Screening Platform, Luxembourg Institute of Systems Biomedicine, University of Luxembourg and Luxembourg Institute of Health, Belvaux, Luxembourg
| | - Ibrahim Boussaad
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg.,Disease Modeling and Screening Platform, Luxembourg Institute of Systems Biomedicine, University of Luxembourg and Luxembourg Institute of Health, Belvaux, Luxembourg
| | | | - Christian Jäger
- Metabolomics Platform, Enzymology and Metabolism, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | | | - Wen Li
- Institute of Health Sciences, China Medical University, Shenyang, China
| | - Lin Yuan
- Institute of Health Sciences, China Medical University, Shenyang, China
| | - Emanuel Berger
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Giuseppe Arena
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Silvia Bolognin
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | | | | | - Paul M A Antony
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Rejko Krüger
- Translational Neuroscience, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg.,Centre Hospitalier de Luxembourg, Parkinson Research Clinic, Luxembourg, Luxembourg.,Transversal Translational Medicine, Luxembourg Institute of Health, Strassen, Luxembourg
| | - Philip Seibler
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Jens C Schwamborn
- Developmental and Cellular Biology, Luxembourg Centre for Systems Biomedicine University of Luxembourg, Esch-sur-Alzette, Luxembourg
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12
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Reyes CJ, Laabs BH, Schaake S, Lüth T, Ardicoglu R, Rakovic A, Grütz K, Alvarez-Fischer D, Jamora RD, Rosales RL, Weyers I, König IR, Brüggemann N, Klein C, Dobricic V, Westenberger A, Trinh J. Brain Regional Differences in Hexanucleotide Repeat Length in X-Linked Dystonia-Parkinsonism Using Nanopore Sequencing. Neurol Genet 2021; 7:e608. [PMID: 34250228 PMCID: PMC8265576 DOI: 10.1212/nxg.0000000000000608] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 06/03/2021] [Indexed: 12/14/2022]
Abstract
Objective Our study investigated the presence of regional differences in hexanucleotide repeat number in postmortem brain tissues of 2 patients with X-linked dystonia-parkinsonism (XDP), a combined dystonia-parkinsonism syndrome modified by a (CCCTCT)n repeat within the causal SINE-VNTR-Alu retrotransposon insertion in the TAF1 gene. Methods Genomic DNA was extracted from blood and postmortem brain samples, including the basal ganglia and cortex from both patients and from the cerebellum, midbrain, and pituitary gland from 1 patient. Repeat sizing was performed using fragment analysis, small-pool PCR-based Southern blotting, and Oxford nanopore sequencing. Results The basal ganglia (p < 0.001) and cerebellum (p < 0.001) showed higher median repeat numbers and higher degrees of repeat instability compared with blood. Conclusions Somatic repeat instability may predominate in brain regions selectively affected in XDP, thereby hinting at its potential role in disease manifestation and modification.
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Affiliation(s)
- Charles Jourdan Reyes
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Björn-Hergen Laabs
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Susen Schaake
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Theresa Lüth
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Raphaela Ardicoglu
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Aleksandar Rakovic
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Karen Grütz
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Daniel Alvarez-Fischer
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Roland Dominic Jamora
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Raymond L Rosales
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Imke Weyers
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Inke R König
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Norbert Brüggemann
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Valerija Dobricic
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Ana Westenberger
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
| | - Joanne Trinh
- Institute of Neurogenetics (C.J.R., S.S., T.L., R.A., A.R., K.G., D.A.-F., N.B., C.K., V.D., A.W., J.T.), University of Lübeck, and Institute of Medical Biometry and Statistics (B.-H.L., I.R.K.), University of Lübeck, Germany; Department of Neurosciences (R.D.J.), College of Medicine-Philippine General Hospital, University of the Philippines Manila; Department of Neurology and Psychiatry (R.L.R.), University of Santo Tomas Hospital, Manila, Philippines; Institute of Anatomy (I.W.), Department of Neurology (N.B.), and Lübeck Interdisciplinary Platform for Genome Analytics (V.D.), University of Lübeck, Germany
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13
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Vishnolia KK, Rakovic A, Hoene C, Tarhbalouti K, Aherrahrou Z, Erdmann J. sGC Activity and Regulation of Blood Flow in a Zebrafish Model System. Front Physiol 2021; 12:633171. [PMID: 33716783 PMCID: PMC7946990 DOI: 10.3389/fphys.2021.633171] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 11/25/2020] [Accepted: 02/08/2021] [Indexed: 12/12/2022] Open
Abstract
Soluble guanylyl cyclase (sGC) protein is a heterodimer formed by two subunits encoded by GUCY1A1 and GUCY1B1 genes. The chromosomal locus 4q32.1 harbors both of these genes, which has been previously significantly associated with coronary artery disease, myocardial infarction, and high blood pressure. Blood pressure is influenced by both the environment and genetics and is complemented by several biological pathways. The underlying mechanisms associated with this locus and its genes still need to be investigated. In the current study, we aimed to establish the zebrafish as a model organism to investigate the mechanisms surrounding sGC activity and blood pressure. A zebrafish mutant gucy1a1 line was generated using the CRISPR-Cas9 system by inducing a 4-bp deletion frameshift mutation. This mutation resulted in a reduction of gucy1a1 expression in both heterozygote and homozygote zebrafish. Blood flow parameters (blood flow, arterial pulse, linear velocity, and vessel diameter) investigated in the gucy1a1 mutants showed a significant increase in blood flow and linear velocity, which was augmented in the homozygotes. No significant differences were observed for the blood flow parameters measured from larvae with individual morpholino downregulation of gucy1a1 and gucy1b1, but an increase in blood flow and linear velocity was observed after co-morpholino downregulation of both genes. In addition, the pharmacological sGC stimulator BAY41-2272 rescued the impaired cGMP production in the zebrafish gucy1a1± mutant larvae. Downregulation of cct7 gene did not show any significant difference on the blood flow parameters in both wild-type and gucy1a1± background larvae. In summary, we successfully established a zebrafish platform for investigating sGC-associated pathways and underlying mechanisms in depth. This model system will have further applications, including for potential drug screening experiments.
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Affiliation(s)
- Krishan K Vishnolia
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany.,University of Lübeck, Lübeck, Germany
| | | | - Celine Hoene
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany.,University of Lübeck, Lübeck, Germany
| | - Karim Tarhbalouti
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany.,University of Lübeck, Lübeck, Germany
| | - Zouhair Aherrahrou
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany.,University of Lübeck, Lübeck, Germany
| | - Jeanette Erdmann
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany.,DZHK (German Research Centre for Cardiovascular Research), Partner Site Hamburg/Lübeck/Kiel, Lübeck, Germany.,University of Lübeck, Lübeck, Germany
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14
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Lang AE, Bally JF, Breen DP, Schaake S, Trinh J, Rakovic A, Klein C. Mild dopa-responsive dystonia in heterozygous tyrosine hydroxylase mutation carrier: Evidence of symptomatic enzyme deficiency? Response from the authors. Parkinsonism Relat Disord 2020; 74:80. [PMID: 32305180 DOI: 10.1016/j.parkreldis.2020.03.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 03/23/2020] [Indexed: 10/24/2022]
Affiliation(s)
- Anthony E Lang
- Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, Toronto, Canada.
| | - Julien F Bally
- Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, Toronto, Canada; Department of Neurology, University of Geneva and University Hospitals of Geneva, Geneva, Switzerland
| | - David P Breen
- Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, Toronto, Canada; Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK; Anne Rowling Regenerative Neurology Clinic, University of Edinburgh, Edinburgh, UK; Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, UK
| | - Susen Schaake
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Joanne Trinh
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | | | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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15
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Bally JF, Breen DP, Schaake S, Trinh J, Rakovic A, Klein C, Lang AE. Mild dopa-responsive dystonia in heterozygous tyrosine hydroxylase mutation carrier: Evidence of symptomatic enzyme deficiency? Parkinsonism Relat Disord 2020; 71:44-45. [PMID: 32018151 PMCID: PMC7109519 DOI: 10.1016/j.parkreldis.2020.01.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/08/2020] [Accepted: 01/27/2020] [Indexed: 11/29/2022]
Abstract
We present a case of mild, adult-onset dopa-responsive dystonia (DRD) with a heterozygous mutation in the tyrosine hydroxylase (TH) gene. We propose that this genetic state may have led to partial enzyme deficiency. Future studies should attempt to identify and characterize the phenotype of other patients with single TH variants.
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Affiliation(s)
- Julien F Bally
- Department of Neurology, University of Geneva and University Hospitals of Geneva, Geneva, Switzerland; Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, Toronto, Canada.
| | - David P Breen
- Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, Toronto, Canada; Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK; Anne Rowling Regenerative Neurology Clinic, University of Edinburgh, Edinburgh, UK; Usher Institute of Population Health Sciences and Informatics, University of Edinburgh, Edinburgh, UK
| | - Susen Schaake
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Joanne Trinh
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | | | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Anthony E Lang
- Edmond J. Safra Program in Parkinson's Disease and Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, Toronto, Canada.
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16
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Schiemenz C, Westenberger A, Tanzer K, Grütz K, Borsche M, Mahlke G, Schaake S, Rakovic A, Aherrahrou Z, Erdmann J, Klein C, Alvarez-Fischer D. Osteoclast imbalance in primary familial brain calcification: evidence for its role in brain calcification. Brain 2020; 143:e1. [PMID: 31754706 DOI: 10.1093/brain/awz351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
| | - Ana Westenberger
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Kerstin Tanzer
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Karen Grütz
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Max Borsche
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Georg Mahlke
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Susen Schaake
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | | | - Zouhair Aherrahrou
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
| | - Jeanette Erdmann
- Institute for Cardiogenetics, University of Lübeck, Lübeck, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Daniel Alvarez-Fischer
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany.,Department of Psychiatry and Psychotherapy, University of Lübeck, Lübeck, Germany
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17
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Vulinovic F, Krajka V, Hausrat TJ, Seibler P, Alvarez-Fischer D, Madoev H, Park JS, Kumar KR, Sue CM, Lohmann K, Kneussel M, Klein C, Rakovic A. Motor protein binding and mitochondrial transport are altered by pathogenic TUBB4A variants. Hum Mutat 2019; 40:2444. [PMID: 31758849 DOI: 10.1002/humu.23913] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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18
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Rakovic A, Domingo A, Grütz K, Kulikovskaja L, Capetian P, Cowley SA, Lenz I, Brüggemann N, Rosales R, Jamora D, Rolfs A, Seibler P, Westenberger A, König I, Klein C. Genome editing in induced pluripotent stem cells rescues TAF1 levels in X-linked dystonia-parkinsonism. Mov Disord 2019; 33:1108-1118. [PMID: 30153385 DOI: 10.1002/mds.27441] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 04/01/2018] [Accepted: 04/09/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The most likely genetic cause of X-linked dystonia-parkinsonism, a neurodegenerative movement disorder endemic to the Philippines, is a 2672-bp-long retrotransposon insertion in intron 32 of the TAF1 gene. The objectives of this study were to investigate whether (1) TAF1 expression is altered in induced pluripotent stem cells and differentiated neuronal models and (2) excision of the retrotransposon insertion restores normal TAF1 expression. METHODS Expression of TAF1 and its neuronal isoform were determined in induced pluripotent stem cells and in induced pluripotent stem cell-derived cortical neurons and spiny projection neurons using quantitative PCR. Genome editing-based excision of the retrotransposon insertion was performed on induced pluripotent stem cells from 3 X-linked dystonia-parkinsonism patients. Edited and unedited induced pluripotent stem cells from X-linked dystonia-parkinsonism patients and controls were differentiated into cortical neurons and spiny projection neurons, and TAF1 expression was compared across groups. RESULTS TAF1 was reduced in patient-derived induced pluripotent stem cells (P < 0.05) and spiny projection neurons (P < 0.01). After genome editing, we observed higher TAF1 expression in edited compared with unedited induced pluripotent stem cells (P < 0.0001). In edited spiny projection neurons, TAF1 expression was also increased, but did not reach statistical significance. No expression differences were observed in cortical neurons. CONCLUSIONS (1) TAF1 reduction in X-linked dystonia-parkinsonism is likely due to the retrotransposon insertion and is recapitulated in induced pluripotent stem cells and differentiated spiny projection neurons. (2) TAF1 reduction is a tractable molecular phenotype of X-linked dystonia-parkinsonism that can be driven by excision of the retrotransposon insertion. (3) Successful rescue of the molecular phenotype in an endogenous, genome-edited model serves as a proof of principle that may successfully be transferred to other inherited neurodegenerative diseases. © 2018 International Parkinson and Movement Disorder Society.
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Affiliation(s)
| | - Aloysius Domingo
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Karen Grütz
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | | | - Philipp Capetian
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Sally A Cowley
- Sir William Dunn School of Pathology, University of Oxford, Oxford, United Kingdom
| | - Insa Lenz
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | | | - Raymond Rosales
- Departments of Neurology and Psychiatry, University of Santo Tomas, Manila, Philippines
| | - Dominic Jamora
- Department of Neurosciences, College of Medicine, University of the Philippines-Philippine General Hospital, Manila, Philippines
| | - Arndt Rolfs
- Albrecht-Kossel-Institute for Neuroregeneration (AKos), University of Rostock, Rostock, Germany
| | - Philip Seibler
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Ana Westenberger
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Inke König
- Institut für Medizinische Biometrie und Statistik, University of Lübeck, Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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19
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Chakraborty J, von Stockum S, Marchesan E, Caicci F, Ferrari V, Rakovic A, Klein C, Antonini A, Bubacco L, Ziviani E. USP14 inhibition corrects an in vivo model of impaired mitophagy. EMBO Mol Med 2019; 10:emmm.201809014. [PMID: 30249595 PMCID: PMC6220287 DOI: 10.15252/emmm.201809014] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [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] [Indexed: 12/02/2022] Open
Abstract
Mitochondrial autophagy or mitophagy is a key process that allows selective sequestration and degradation of dysfunctional mitochondria to prevent excessive reactive oxygen species, and activation of cell death. Recent studies revealed that ubiquitin–proteasome complex activity and mitochondrial membrane rupture are key steps preceding mitophagy, in combination with the ubiquitination of specific outer mitochondrial membrane (OMM) proteins. The deubiquitinating enzyme ubiquitin‐specific peptidase 14 (USP14) has been shown to modulate both proteasome activity and autophagy. Here, we report that genetic and pharmacological inhibition of USP14 promotes mitophagy, which occurs in the absence of the well‐characterised mediators of mitophagy, PINK1 and Parkin. Critical to USP14‐induced mitophagy is the exposure of the LC3 receptor Prohibitin 2 by mitochondrial fragmentation and mitochondrial membrane rupture. Genetic or pharmacological inhibition of USP14 in vivo corrected mitochondrial dysfunction and locomotion behaviour of PINK1/Parkin mutant Drosophila model of Parkinson's disease, an age‐related progressive neurodegenerative disorder that is correlated with diminished mitochondrial quality control. Our study identifies a novel therapeutic target that ameliorates mitochondrial dysfunction and in vivo PD‐related symptoms.
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Affiliation(s)
| | | | | | | | - Vanni Ferrari
- Department of Biology, University of Padova, Padova, Italy
| | | | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Angelo Antonini
- Department of Neuroscience, University of Padova, Padova, Italy
| | - Luigi Bubacco
- Department of Biology, University of Padova, Padova, Italy
| | - Elena Ziviani
- Department of Biology, University of Padova, Padova, Italy .,Fondazione Ospedale San Camillo IRCCS, Venezia, Italia
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20
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Westenberger A, Reyes CJ, Saranza G, Dobricic V, Hanssen H, Domingo A, Laabs B, Schaake S, Pozojevic J, Rakovic A, Grütz K, Begemann K, Walter U, Dressler D, Bauer P, Rolfs A, Münchau A, Kaiser FJ, Ozelius LJ, Jamora RD, Rosales RL, Diesta CCE, Lohmann K, König IR, Brüggemann N, Klein C. A hexanucleotide repeat modifies expressivity of X‐linked dystonia parkinsonism. Ann Neurol 2019; 85:812-822. [DOI: 10.1002/ana.25488] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 04/08/2019] [Accepted: 04/10/2019] [Indexed: 02/02/2023]
Affiliation(s)
| | | | - Gerard Saranza
- Department of NeurosciencesCollege of Medicine‐Philippine General Hospital, University of the Philippines Manila Philippines
| | - Valerija Dobricic
- Institute of NeurogeneticsUniversity of Lübeck Lübeck Germany
- Lübeck Interdisciplinary Platform for Genome AnalyticsInstitutes of Neurogenetics and Cardiogenetics, University of Lübeck Lübeck Germany
| | - Henrike Hanssen
- Institute of NeurogeneticsUniversity of Lübeck Lübeck Germany
- Department of NeurologyUniversity of Lübeck Lübeck Germany
| | - Aloysius Domingo
- Institute of NeurogeneticsUniversity of Lübeck Lübeck Germany
- Center for Genomic MedicineMassachusetts General Hospital Boston MA
| | - Björn‐Hergen Laabs
- Institute of Medical Biometry and StatisticsUniversity of Lübeck Lübeck Germany
| | - Susen Schaake
- Institute of NeurogeneticsUniversity of Lübeck Lübeck Germany
| | - Jelena Pozojevic
- Section for Functional GeneticsInstitute for Human Genetics, University of Lübeck Lübeck Germany
| | | | - Karen Grütz
- Institute of NeurogeneticsUniversity of Lübeck Lübeck Germany
| | | | - Uwe Walter
- Department of NeurologyUniversity of Rostock Rostock Germany
| | - Dirk Dressler
- Movement Disorders Section, Department of NeurologyHannover Medical School Hannover Germany
| | | | | | | | - Frank J. Kaiser
- Section for Functional GeneticsInstitute for Human Genetics, University of Lübeck Lübeck Germany
| | - Laurie J. Ozelius
- Department of NeurologyMassachusetts General Hospital and Harvard Medical School Boston MA
| | - Roland Dominic Jamora
- Department of NeurosciencesCollege of Medicine‐Philippine General Hospital, University of the Philippines Manila Philippines
| | | | - Cid Czarina E. Diesta
- Department of Neurosciences, Movement Disorders ClinicMakati Medical Center Makati City Philippines
| | - Katja Lohmann
- Institute of NeurogeneticsUniversity of Lübeck Lübeck Germany
| | - Inke R. König
- Institute of Medical Biometry and StatisticsUniversity of Lübeck Lübeck Germany
| | - Norbert Brüggemann
- Institute of NeurogeneticsUniversity of Lübeck Lübeck Germany
- Department of NeurologyUniversity of Lübeck Lübeck Germany
| | - Christine Klein
- Institute of NeurogeneticsUniversity of Lübeck Lübeck Germany
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21
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Guida M, Zanon A, Montibeller L, Lavdas AA, Ladurner J, Pischedda F, Rakovic A, Domingues FS, Piccoli G, Klein C, Pramstaller PP, Hicks AA, Pichler I. Parkin Interacts with Apoptosis-Inducing Factor and Interferes with Its Translocation to the Nucleus in Neuronal Cells. Int J Mol Sci 2019; 20:ijms20030748. [PMID: 30754623 PMCID: PMC6386878 DOI: 10.3390/ijms20030748] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 01/31/2019] [Accepted: 02/04/2019] [Indexed: 12/20/2022] Open
Abstract
Mutations in the PRKN gene (encoding parkin) have been linked to the most frequent known cause of recessive Parkinson's disease (PD), and parkin dysfunction represents a risk factor for sporadic PD. Parkin is widely neuroprotective through different cellular pathways, as it protects dopaminergic neurons from apoptosis in a series of cellular and animal models of PD. The mitochondrial protein apoptosis-inducing factor (AIF) is an important cell death effector, which, upon cellular stress in many paradigms, is redistributed from the mitochondria to the nucleus to function as a proapoptotic factor, mostly independent of caspase activity, while in normal mitochondria it functions as an antiapoptotic factor. AIF is known to participate in dopaminergic neuron loss in experimental PD models and in patients with PD. We, therefore, investigated possible crosstalk between parkin and AIF. By using immunoprecipitation and proximity ligation assays, we demonstrated a physical interaction between the two proteins. Nuclear AIF translocation was significantly reduced by parkin expression in neuroblastoma SH-SY5Y cells after exposure to an apoptogenic stimulus. These results were confirmed in primary murine cortical neurons, which showed a higher nuclear translocation of AIF in parkin-deficient neurons upon an excitotoxic stimulus. Our results indicate that the interaction of parkin with AIF interferes with the nuclear translocation of AIF, which might contribute to the neuroprotective activity of parkin.
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Affiliation(s)
- Marianna Guida
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100 Bolzano, Italy.
| | - Alessandra Zanon
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100 Bolzano, Italy.
| | - Luigi Montibeller
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100 Bolzano, Italy.
| | - Alexandros A Lavdas
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100 Bolzano, Italy.
| | - Judith Ladurner
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100 Bolzano, Italy.
| | - Francesca Pischedda
- Department of Cellular, Computational and Integrative Biology and Dulbecco Telethon Institute, University of Trento, via Sommarive 9, 38123 Povo, Italy.
| | - Aleksandar Rakovic
- Institute of Neurogenetics, University of Lübeck, Maria-Goeppert-Straße 1, 23562 Lübeck, Germany.
| | - Francisco S Domingues
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100 Bolzano, Italy.
| | - Giovanni Piccoli
- Department of Cellular, Computational and Integrative Biology and Dulbecco Telethon Institute, University of Trento, via Sommarive 9, 38123 Povo, Italy.
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Maria-Goeppert-Straße 1, 23562 Lübeck, Germany.
| | - Peter P Pramstaller
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100 Bolzano, Italy.
- Department of Neurology, University of Lübeck, Ratzeburger Allee 160, 23538 Lübeck, Germany.
| | - Andrew A Hicks
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100 Bolzano, Italy.
| | - Irene Pichler
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Via Galvani 31, 39100 Bolzano, Italy.
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22
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Zanon A, Kalvakuri S, Rakovic A, Foco L, Guida M, Schwienbacher C, Serafin A, Rudolph F, Trilck M, Grünewald A, Stanslowsky N, Wegner F, Giorgio V, Lavdas AA, Bodmer R, Pramstaller PP, Klein C, Hicks AA, Pichler I, Philip S. Corrigendum: SLP-2 interacts with Parkin in mitochondria and prevents mitochondrial dysfunction in Parkin-deficient human iPSC-derived neurons and Drosophila. Hum Mol Genet 2018; 28:1225. [PMID: 30517638 DOI: 10.1093/hmg/ddy408] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Alessandra Zanon
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy
| | - Sreehari Kalvakuri
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | | | - Luisa Foco
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy
| | - Marianna Guida
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy
| | - Christine Schwienbacher
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy
| | - Alice Serafin
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy
| | | | - Michaela Trilck
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Anne Grünewald
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany.,Molecular and Functional Neurobiology Group, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Belvaux, Luxembourg
| | | | - Florian Wegner
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | | | - Alexandros A Lavdas
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy
| | - Rolf Bodmer
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Peter P Pramstaller
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy.,Department of Neurology, General Central Hospital, Bolzano, Italy.,Department of Neurology, University of Lübeck, Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Andrew A Hicks
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy
| | - Irene Pichler
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, Bolzano, Italy
| | - Seibler Philip
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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23
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Rakovic A, Ziegler J, Mårtensson CU, Prasuhn J, Shurkewitsch K, König P, Paulson HL, Klein C. PINK1-dependent mitophagy is driven by the UPS and can occur independently of LC3 conversion. Cell Death Differ 2018; 26:1428-1441. [PMID: 30375512 DOI: 10.1038/s41418-018-0219-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 09/17/2018] [Accepted: 10/02/2018] [Indexed: 12/21/2022] Open
Abstract
The Parkinson's disease (PD)-related ubiquitin ligase Parkin and mitochondrial kinase PINK1 function together in the clearance of damaged mitochondria. Upon mitochondrial depolarization, Parkin translocates to mitochondria in a PINK1-dependent manner to ubiquitinate outer mitochondrial membrane proteins. According to the current model, the ubiquitin- and LC3-binding adaptor protein SQSTM1 is recruited to mitochondria, followed by their selective degradation through autophagy (mitophagy). However, the role of the ubiquitin proteasome system (UPS), although essential for this process, still remains largely elusive. Here, we investigated the role of the UPS and autophagy by applying the potassium ionophore Valinomycin in PINK1-deficient human fibroblasts and isogenic neuroblastoma cell lines generated by CRISPR/Cas9. Although identical to the commonly used CCCP/FCCP in terms of dissipating the mitochondrial membrane potential and triggering complete removal of mitochondria, Valinomycin did not induce conversion of LC3 to its autophagy-related form. Moreover, FCCP-induced conversion of LC3 occurred even in mitophagy-incompetent, PINK1-deficient cell lines. While both stressors required a functional UPS, the removal of depolarized mitochondria persisted in cells depleted of LC3A and LC3B. Our study highlights the importance of the UPS in PINK1-/Parkin-mediated mitochondrial quality control. In contrast, activation of autophagy, monitored through conversion of LC3, is likely induced by depolarizing-agent-induced toxicity in a PINK1-/Parkin-independent manner.
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Affiliation(s)
- Aleksandar Rakovic
- Institute of Neurogenetics, University of Lübeck, 23562, Lübeck, Germany
| | - Jonathan Ziegler
- Institute of Neurogenetics, University of Lübeck, 23562, Lübeck, Germany
| | - Christoph U Mårtensson
- Institute of Neurogenetics, University of Lübeck, 23562, Lübeck, Germany.,Institute of Biochemistry and Molecular Biology, University of Freiburg, 79104, Freiburg, Germany
| | - Jannik Prasuhn
- Institute of Neurogenetics, University of Lübeck, 23562, Lübeck, Germany
| | | | - Peter König
- Institute of Anatomy, University of Lübeck, 23562, Lübeck, Germany
| | - Henry L Paulson
- Department of Neurology, University of Michigan Health System, Ann Arbor, MI, 48109-2200, USA
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, 23562, Lübeck, Germany.
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24
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Seibler P, Burbulla LF, Dulovic M, Zittel S, Heine J, Schmidt T, Rudolph F, Westenberger A, Rakovic A, Münchau A, Krainc D, Klein C. Iron overload is accompanied by mitochondrial and lysosomal dysfunction in WDR45 mutant cells. Brain 2018; 141:3052-3064. [PMID: 30169597 PMCID: PMC7190033 DOI: 10.1093/brain/awy230] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Revised: 07/08/2018] [Accepted: 07/15/2018] [Indexed: 01/10/2023] Open
Abstract
Beta-propeller protein-associated neurodegeneration is a subtype of monogenic neurodegeneration with brain iron accumulation caused by de novo mutations in WDR45. The WDR45 protein functions as a beta-propeller scaffold and plays a putative role in autophagy through its interaction with phospholipids and autophagy-related proteins. Loss of WDR45 function due to disease-causing mutations has been linked to defects in autophagic flux in patient and animal cells. However, the role of WDR45 in iron homeostasis remains elusive. Here we studied patient-specific WDR45 mutant fibroblasts and induced pluripotent stem cell-derived midbrain neurons. Our data demonstrated that loss of WDR45 increased cellular iron levels and oxidative stress, accompanied by mitochondrial abnormalities, autophagic defects, and diminished lysosomal function. Restoring WDR45 levels partially rescued oxidative stress and the susceptibility to iron treatment, and activation of autophagy reduced the observed iron overload in WDR45 mutant cells. Our data suggest that iron-containing macromolecules and organelles cannot effectively be degraded through the lysosomal pathway due to loss of WDR45 function.
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Affiliation(s)
- Philip Seibler
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Lena F Burbulla
- Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Marija Dulovic
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Simone Zittel
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Johanne Heine
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Thomas Schmidt
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | | | - Ana Westenberger
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | | | | | - Dimitri Krainc
- Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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25
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Vulinovic F, Krajka V, Hausrat TJ, Seibler P, Alvarez-Fischer D, Madoev H, Park JS, Kumar KR, Sue CM, Lohmann K, Kneussel M, Klein C, Rakovic A. Motor protein binding and mitochondrial transport are altered by pathogenic TUBB4A variants. Hum Mutat 2018; 39:1901-1915. [PMID: 30079973 DOI: 10.1002/humu.23602] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 07/05/2018] [Accepted: 07/29/2018] [Indexed: 12/21/2022]
Abstract
Mutations in TUBB4A have been identified to cause a wide phenotypic spectrum of diseases ranging from hereditary generalized dystonia with whispering dysphonia (DYT-TUBB4A) and hereditary spastic paraplegia (HSP) to leukodystrophy hypomyelination with atrophy of the basal ganglia and cerebellum (H-ABC). TUBB4A encodes the brain-specific β-tubulin isotype, β-tubulin 4A. To elucidate the pathogenic mechanisms conferred by TUBB4A mutations leading to the different phenotypes, we functionally characterized three pathogenic TUBB4A variants (c.4C>G,p.R2G; c.745G>A,p.D249N; c.811G>A, p.A271T) as representatives of the mutational and disease spectrum) in human neuroblastoma cells and human induced pluripotent stem cell (iPSC)-derived neurons. We showed that mRNA stability was not affected by any of the TUBB4A variants. Although two mutations (p.R2G and p.D249N) are located at the α/β-tubulin interdimer interface, we confirmed incorporation of all TUBB4A mutants into the microtubule network. However, we showed that the mutations p.D249N and p.A271T interfered with motor protein binding to microtubules and impaired neurite outgrowth and microtubule dynamics. Finally, TUBB4A mutations, as well as heterozygous knockout of TUBB4A, disrupted mitochondrial transport in iPSC-derived neurons. Taken together, our findings suggest that functional impairment of microtubule-associated transport is a shared pathogenic mechanism by which the TUBB4A mutations studied here cause a spectrum of diseases.
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Affiliation(s)
- Franca Vulinovic
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Victor Krajka
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Torben J Hausrat
- Institute of Molecular Neurogenetics, Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Philip Seibler
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | | | - Harutyun Madoev
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Jin-Sung Park
- Department of Neurogenetics, Kolling Institute, Royal North Shore Hospital and the University of Sydney, St. Leonards, New South Wales, Australia
| | - Kishore R Kumar
- Department of Neurogenetics, Kolling Institute, Royal North Shore Hospital and the University of Sydney, St. Leonards, New South Wales, Australia
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, Australia
| | - Carolyn M Sue
- Department of Neurogenetics, Kolling Institute, Royal North Shore Hospital and the University of Sydney, St. Leonards, New South Wales, Australia
| | - Katja Lohmann
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Matthias Kneussel
- Institute of Molecular Neurogenetics, Center for Molecular Neurobiology, ZMNH, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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26
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McLelland GL, Goiran T, Yi W, Dorval G, Chen CX, Lauinger ND, Krahn AI, Valimehr S, Rakovic A, Rouiller I, Durcan TM, Trempe JF, Fon EA. Mfn2 ubiquitination by PINK1/parkin gates the p97-dependent release of ER from mitochondria to drive mitophagy. eLife 2018; 7:32866. [PMID: 29676259 PMCID: PMC5927771 DOI: 10.7554/elife.32866] [Citation(s) in RCA: 238] [Impact Index Per Article: 39.7] [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: 11/08/2017] [Accepted: 04/19/2018] [Indexed: 12/23/2022] Open
Abstract
Despite their importance as signaling hubs, the function of mitochondria-ER contact sites in mitochondrial quality control pathways remains unexplored. Here we describe a mechanism by which Mfn2, a mitochondria-ER tether, gates the autophagic turnover of mitochondria by PINK1 and parkin. Mitochondria-ER appositions are destroyed during mitophagy, and reducing mitochondria-ER contacts increases the rate of mitochondrial degradation. Mechanistically, parkin/PINK1 catalyze a rapid burst of Mfn2 phosphoubiquitination to trigger p97-dependent disassembly of Mfn2 complexes from the outer mitochondrial membrane, dissociating mitochondria from the ER. We additionally demonstrate that a major portion of the facilitatory effect of p97 on mitophagy is epistatic to Mfn2 and promotes the availability of other parkin substrates such as VDAC1. Finally, we reconstitute the action of these factors on Mfn2 and VDAC1 ubiquitination in a cell-free assay. We show that mitochondria-ER tethering suppresses mitophagy and describe a parkin-/PINK1-dependent mechanism that regulates the destruction of mitochondria-ER contact sites.
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Affiliation(s)
- Gian-Luca McLelland
- McGill Parkinson Program, Montreal Neurological Institute, McGill University, Montreal, Canada.,Neurodegenerative Diseases Group, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Thomas Goiran
- McGill Parkinson Program, Montreal Neurological Institute, McGill University, Montreal, Canada.,Neurodegenerative Diseases Group, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Wei Yi
- McGill Parkinson Program, Montreal Neurological Institute, McGill University, Montreal, Canada.,Neurodegenerative Diseases Group, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Geneviève Dorval
- McGill Parkinson Program, Montreal Neurological Institute, McGill University, Montreal, Canada.,Neurodegenerative Diseases Group, Montreal Neurological Institute, McGill University, Montreal, Canada.,iPSC-CRISPR Platform, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Carol X Chen
- McGill Parkinson Program, Montreal Neurological Institute, McGill University, Montreal, Canada.,Neurodegenerative Diseases Group, Montreal Neurological Institute, McGill University, Montreal, Canada.,iPSC-CRISPR Platform, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Nadine D Lauinger
- McGill Parkinson Program, Montreal Neurological Institute, McGill University, Montreal, Canada.,Neurodegenerative Diseases Group, Montreal Neurological Institute, McGill University, Montreal, Canada.,iPSC-CRISPR Platform, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Andrea I Krahn
- McGill Parkinson Program, Montreal Neurological Institute, McGill University, Montreal, Canada.,Neurodegenerative Diseases Group, Montreal Neurological Institute, McGill University, Montreal, Canada
| | - Sepideh Valimehr
- Department of Anatomy & Cell Biology, McGill University, Montreal, Canada
| | | | - Isabelle Rouiller
- Department of Anatomy & Cell Biology, McGill University, Montreal, Canada
| | - Thomas M Durcan
- McGill Parkinson Program, Montreal Neurological Institute, McGill University, Montreal, Canada.,Neurodegenerative Diseases Group, Montreal Neurological Institute, McGill University, Montreal, Canada.,iPSC-CRISPR Platform, Montreal Neurological Institute, McGill University, Montreal, Canada
| | | | - Edward A Fon
- McGill Parkinson Program, Montreal Neurological Institute, McGill University, Montreal, Canada.,Neurodegenerative Diseases Group, Montreal Neurological Institute, McGill University, Montreal, Canada.,iPSC-CRISPR Platform, Montreal Neurological Institute, McGill University, Montreal, Canada
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27
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Prasuhn J, Mårtensson CU, Krajka V, Klein C, Rakovic A. Genome-Edited, TH-expressing Neuroblastoma Cells as a Disease Model for Dopamine-Related Disorders: A Proof-of-Concept Study on DJ-1-deficient Parkinsonism. Front Cell Neurosci 2018; 11:426. [PMID: 29379417 PMCID: PMC5770810 DOI: 10.3389/fncel.2017.00426] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 11/08/2017] [Accepted: 12/19/2017] [Indexed: 11/13/2022] Open
Abstract
Impairment of the dopaminergic (DA) system is a common cause of several movement disorders including Parkinson's disease (PD), however, little is known about the underlying disease mechanisms. The recent development of stem-cell-based protocols for the generation of DA neurons partially solved this issue, however, this technology is costly and time-consuming. Commonly used cell lines, i.e., neuroblastoma (SHSY5Y) and PC12 cells are still widely used to investigate PD and significantly contributed to our understanding of mechanisms involved in development of the disease. However, they either do not express DA at all or require additional, only partially efficient differentiations in order to produce DA. Here we generated and characterized transgenic SH-SY5Y cells, ectopically expressing tyrosine hydroxylase (SHTH+), that can be used as a homogenous, DA-producing model to study alterations in DA metabolism and oxidative stress. We demonstrated that SHTH+ produce high levels of DA, 3,4-dihydroxyphenylacetic acid (DOPAC), and homovanillic acid (HVA) making this model suitable to investigate not only alterations in DA synthesis but also its turnover. We also provide evidence for the presence of other enzymes involved in DA synthesis and its turnover in these cells. Finally, we showed that these cells can easily be genetically modified using CRISPR/Cas9 technology in order to study genetically defined forms of movement disorders using DJ1-linked PD as a model.
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Affiliation(s)
- Jannik Prasuhn
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | | | - Victor Krajka
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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28
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Zanon A, Kalvakuri S, Rakovic A, Foco L, Guida M, Schwienbacher C, Serafin A, Rudolph F, Trilck M, Grünewald A, Stanslowsky N, Wegner F, Giorgio V, Lavdas AA, Bodmer R, Pramstaller PP, Klein C, Hicks AA, Pichler I, Seibler P. SLP-2 interacts with Parkin in mitochondria and prevents mitochondrial dysfunction in Parkin-deficient human iPSC-derived neurons and Drosophila. Hum Mol Genet 2017; 26:2412-2425. [PMID: 28379402 DOI: 10.1093/hmg/ddx132] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 03/16/2017] [Indexed: 12/26/2022] Open
Abstract
Mutations in the Parkin gene (PARK2) have been linked to a recessive form of Parkinson's disease (PD) characterized by the loss of dopaminergic neurons in the substantia nigra. Deficiencies of mitochondrial respiratory chain complex I activity have been observed in the substantia nigra of PD patients, and loss of Parkin results in the reduction of complex I activity shown in various cell and animal models. Using co-immunoprecipitation and proximity ligation assays on endogenous proteins, we demonstrate that Parkin interacts with mitochondrial Stomatin-like protein 2 (SLP-2), which also binds the mitochondrial lipid cardiolipin and functions in the assembly of respiratory chain proteins. SH-SY5Y cells with a stable knockdown of Parkin or SLP-2, as well as induced pluripotent stem cell-derived neurons from Parkin mutation carriers, showed decreased complex I activity and altered mitochondrial network morphology. Importantly, induced expression of SLP-2 corrected for these mitochondrial alterations caused by reduced Parkin function in these cells. In-vivo Drosophila studies showed a genetic interaction of Parkin and SLP-2, and further, tissue-specific or global overexpression of SLP-2 transgenes rescued parkin mutant phenotypes, in particular loss of dopaminergic neurons, mitochondrial network structure, reduced ATP production, and flight and motor dysfunction. The physical and genetic interaction between Parkin and SLP-2 and the compensatory potential of SLP-2 suggest a functional epistatic relationship to Parkin and a protective role of SLP-2 in neurons. This finding places further emphasis on the significance of Parkin for the maintenance of mitochondrial function in neurons and provides a novel target for therapeutic strategies.
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Affiliation(s)
- Alessandra Zanon
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, 39100 Bolzano, Italy
| | - Sreehari Kalvakuri
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | | | - Luisa Foco
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, 39100 Bolzano, Italy
| | - Marianna Guida
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, 39100 Bolzano, Italy
| | - Christine Schwienbacher
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, 39100 Bolzano, Italy
| | - Alice Serafin
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, 39100 Bolzano, Italy
| | - Franziska Rudolph
- Institute of Neurogenetics, University of Lübeck, 23562 Lübeck, Germany
| | - Michaela Trilck
- Institute of Neurogenetics, University of Lübeck, 23562 Lübeck, Germany
| | - Anne Grünewald
- Institute of Neurogenetics, University of Lübeck, 23562 Lübeck, Germany.,Molecular and Functional Neurobiology Group, Luxembourg Centre for Systems Biomedicine, University of Luxembourg, L-4367 Belvaux, Luxembourg
| | - Nancy Stanslowsky
- Department of Neurology, Hannover Medical School, 30625 Hannover, Germany
| | - Florian Wegner
- Department of Neurology, Hannover Medical School, 30625 Hannover, Germany
| | | | - Alexandros A Lavdas
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, 39100 Bolzano, Italy
| | - Rolf Bodmer
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Peter P Pramstaller
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, 39100 Bolzano, Italy.,Department of Neurology, General Central Hospital, 39100 Bolzano, Italy.,Department of Neurology, University of Lübeck, 23562 Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, 23562 Lübeck, Germany
| | - Andrew A Hicks
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, 39100 Bolzano, Italy
| | - Irene Pichler
- Institute for Biomedicine, Eurac Research, Affiliated Institute of the University of Lübeck, 39100 Bolzano, Italy
| | - Philip Seibler
- Institute of Neurogenetics, University of Lübeck, 23562 Lübeck, Germany
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29
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Hebert E, Borngräber F, Schmidt A, Rakovic A, Brænne I, Weissbach A, Hampf J, Vollstedt EJ, Größer L, Schaake S, Müller M, Manzoor H, Jabusch HC, Alvarez-Fischer D, Kasten M, Kostic VS, Gasser T, Zeuner KE, Kim HJ, Jeon B, Bauer P, Altenmüller E, Klein C, Lohmann K. Functional Characterization of Rare RAB12 Variants and Their Role in Musician's and Other Dystonias. Genes (Basel) 2017; 8:genes8100276. [PMID: 29057844 PMCID: PMC5664126 DOI: 10.3390/genes8100276] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 09/13/2017] [Revised: 10/16/2017] [Accepted: 10/17/2017] [Indexed: 01/07/2023] Open
Abstract
Mutations in RAB (member of the Ras superfamily) genes are increasingly recognized as cause of a variety of disorders including neurological conditions. While musician’s dystonia (MD) and writer’s dystonia (WD) are task-specific movement disorders, other dystonias persistently affect postures as in cervical dystonia. Little is known about the underlying etiology. Next-generation sequencing revealed a rare missense variant (c.586A>G; p.Ile196Val) in RAB12 in two of three MD/WD families. Next, we tested 916 additional dystonia patients; 512 Parkinson’s disease patients; and 461 healthy controls for RAB12 variants and identified 10 additional carriers of rare missense changes among dystonia patients (1.1%) but only one carrier in non-dystonic individuals (0.1%; p = 0.005). The detected variants among index patients comprised p.Ile196Val (n = 6); p.Ala174Thr (n = 3); p.Gly13Asp; p.Ala148Thr; and p.Arg181Gln in patients with MD; cervical dystonia; or WD. Two relatives of MD patients with WD also carried p.Ile196Val. The two variants identified in MD patients (p.Ile196Val; p.Gly13Asp) were characterized on endogenous levels in patient-derived fibroblasts and in two RAB12-overexpressing cell models. The ability to hydrolyze guanosine triphosphate (GTP), so called GTPase activity, was increased in mutants compared to wildtype. Furthermore, subcellular distribution of RAB12 in mutants was altered in fibroblasts. Soluble Transferrin receptor 1 levels were reduced in the blood of all three tested p.Ile196Val carriers. In conclusion, we demonstrate an enrichment of missense changes among dystonia patients. Functional characterization revealed altered enzyme activity and lysosomal distribution in mutants suggesting a contribution of RAB12 variants to MD and other dystonias.
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Affiliation(s)
- Eva Hebert
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
| | - Friederike Borngräber
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
- Kurt Singer Institute for Music Physiology and Musicians' Health, Hanns Eisler School of Music Berlin, 10595 Berlin, Germany.
- Berlin Center for Musicians' Medicine, Charité-University Medicine Berlin, 10117 Berlin, Germany.
| | - Alexander Schmidt
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
- Kurt Singer Institute for Music Physiology and Musicians' Health, Hanns Eisler School of Music Berlin, 10595 Berlin, Germany.
- Berlin Center for Musicians' Medicine, Charité-University Medicine Berlin, 10117 Berlin, Germany.
| | - Aleksandar Rakovic
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
| | - Ingrid Brænne
- Institute for Integrative and Experimental Genomics, University of Luebeck, 23538 Luebeck, Germany.
| | - Anne Weissbach
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
| | - Jennie Hampf
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
| | | | - Leopold Größer
- Department of Dermatology, University of Regensburg, 93053 Regensburg, Germany.
| | - Susen Schaake
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
| | - Michaela Müller
- Institute for Integrative and Experimental Genomics, University of Luebeck, 23538 Luebeck, Germany.
| | - Humera Manzoor
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
- School of Biological Sciences, University of the Punjab, Quaid-i-Azam Campus, Lahore 54590, Pakistan.
| | | | | | - Meike Kasten
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
- Department of Psychiatry and Psychotherapy, University of Lübeck, 23538 Lubeck, Germany.
| | - Vladimir S Kostic
- Department of Neurodegenerative Diseases, Clinical Center of Serbia, 11000 Belgrade, Serbia.
| | - Thomas Gasser
- Department of Neurology, University of Tübingen, 72076 Tubingen, Germany.
| | - Kirsten E Zeuner
- Department of Neurology, University of Kiel, 24105 Kiel, Germany.
| | - Han-Joon Kim
- Department of Neurology, Movement Disorder Center, Seoul National University Hospital, Seoul 03080, Korea.
| | - Beomseok Jeon
- Department of Neurology, Movement Disorder Center, Seoul National University Hospital, Seoul 03080, Korea.
| | | | - Eckart Altenmüller
- Institute of Music Physiology and Musician's Medicine, Hanover University of Music, Drama and Media, 30175 Hanover, Germany.
| | - Christine Klein
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
| | - Katja Lohmann
- Institute of Neurogenetics, University of Luebeck, 23538 Luebeck, Germany.
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Lohmann K, Redin C, Tönnies H, Bressman SB, Subero JIM, Wiegers K, Hinrichs F, Hellenbroich Y, Rakovic A, Raymond D, Ozelius LJ, Schwinger E, Siebert R, Talkowski ME, Saunders-Pullman R, Klein C. Complex and Dynamic Chromosomal Rearrangements in a Family With Seemingly Non-Mendelian Inheritance of Dopa-Responsive Dystonia. JAMA Neurol 2017; 74:806-812. [PMID: 28558098 DOI: 10.1001/jamaneurol.2017.0666] [Citation(s) in RCA: 4] [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] [Indexed: 12/23/2022]
Abstract
Importance Chromosomal rearrangements are increasingly recognized to underlie neurologic disorders and are often accompanied by additional clinical signs beyond the gene-specific phenotypic spectrum. Objective To elucidate the causal genetic variant in a large US family with co-occurrence of dopa-responsive dystonia as well as skeletal and eye abnormalities (ie, ptosis, myopia, and retina detachment). Design, Setting, and Participants We examined 10 members of a family, including 5 patients with dopa-responsive dystonia and skeletal and/or eye abnormalities, from a US tertiary referral center for neurological diseases using multiple conventional molecular methods, including fluorescence in situ hybridization and array comparative genomic hybridization as well as large-insert whole-genome sequencing to survey multiple classes of genomic variations. Of note, there was a seemingly implausible transmission pattern in this family due to a mutation-negative obligate mutation carrier. Main Outcomes and Measures Genetic diagnosis in affected family members and insight into the formation of large deletions. Results Four members were diagnosed with definite and 1 with probable dopa-responsive dystonia. All 5 affected individuals carried a large heterozygous deletion encompassing all 6 exons of GCH1. Additionally, all mutation carriers had congenital ptosis requiring surgery, 4 had myopia, 2 had retinal detachment, and 2 showed skeletal abnormalities of the hands, ie, polydactyly or syndactyly or missing a hand digit. Two individuals were reported to be free of any disease. Analyses revealed complex chromosomal rearrangements on chromosome 14q21-22 in unaffected individuals that triggered the expansion to a larger deletion segregating with affection status. The expansion occurred recurrently, explaining the seemingly non-mendelian inheritance pattern. These rearrangements included a deletion of GCH1, which likely contributes to the dopa-responsive dystonia, as well as a deletion of BMP4 as a potential cause of digital and eye abnormalities. Conclusions and Relevance Our findings alert neurologists to the importance of clinical red flags, ie, unexpected co-occurrence of clinical features that may point to the presence of chromosomal rearrangements as the primary disease cause. The clinical management and diagnostics of such patients requires an interdisciplinary approach in modern clinical-diagnostic care.
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Affiliation(s)
- Katja Lohmann
- Institute of Neurogenetics, University Lübeck, Lübeck, Germany
| | - Claire Redin
- Center for Genomic Medicine, Massachusetts General Hospital, Boston
| | - Holger Tönnies
- Institute of Human Genetics, Christian-Albrechts-University, Kiel, Germany
| | - Susan B Bressman
- Department of Neurology, Beth Israel Medical Center, New York, New York5Department of Neurology, Albert Einstein College of Medicine, New York, New York
| | | | - Karin Wiegers
- Institute of Neurogenetics, University Lübeck, Lübeck, Germany
| | - Frauke Hinrichs
- Institute of Neurogenetics, University Lübeck, Lübeck, Germany6Institute of Human Genetics, University Lübeck, Lübeck, Germany
| | | | | | - Deborah Raymond
- Department of Neurology, Beth Israel Medical Center, New York, New York
| | - Laurie J Ozelius
- Department of Neurology, Massachusetts General Hospital, Charlestown
| | | | - Reiner Siebert
- Institute of Human Genetics, Christian-Albrechts-University, Kiel, Germany8Institute of Human Genetics, University Hospital of Ulm, Ulm, Germany
| | - Michael E Talkowski
- Center for Genomic Medicine, Massachusetts General Hospital, Boston7Department of Neurology, Massachusetts General Hospital, Charlestown9Program in Medical and Population Genetics and Stanley Center for Psychiatric Research, Broad Institute, Cambridge, Massachusetts
| | - Rachel Saunders-Pullman
- Department of Neurology, Beth Israel Medical Center, New York, New York5Department of Neurology, Albert Einstein College of Medicine, New York, New York
| | - Christine Klein
- Institute of Neurogenetics, University Lübeck, Lübeck, Germany
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31
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Vulinovic F, Schaake S, Domingo A, Kumar KR, Defazio G, Mir P, Simonyan K, Ozelius LJ, Brüggemann N, Chung SJ, Rakovic A, Lohmann K, Klein C. Screening study of TUBB4A in isolated dystonia. Parkinsonism Relat Disord 2017; 41:118-120. [PMID: 28655586 DOI: 10.1016/j.parkreldis.2017.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 06/01/2017] [Accepted: 06/09/2017] [Indexed: 01/25/2023]
Abstract
Mutations in TUBB4A have been identified to cause a wide phenotypic spectrum ranging from hereditary generalized dystonia with whispering dysphonia (DYT4) to the leukodystrophy hypomyelination syndrome with atrophy of the basal ganglia and cerebellum (H-ABC). To test for the contribution of TUBB4A mutations in different ethnicities (Spanish, Italian, Korean, Japanese), we screened 492 isolated dystonia cases for mutations in this gene and for the first time determined TUBB4A copy number variations in 336 dystonia patients. A potentially pathogenic rare 3bp-in-frame deletion was found in a patient with cervical dystonia but no copy number variations were detected in this study, suggesting that TUBB4A mutations exceedingly rarely contribute to the etiology of isolated dystonia.
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Affiliation(s)
- Franca Vulinovic
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Susen Schaake
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Aloysius Domingo
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany; Graduate School Lübeck, Lübeck, Germany
| | - Kishore Raj Kumar
- Department of Neurogenetics, Kolling Institute of Medical Research, Royal North Shore Hospital, The University of Sydney, Australia; Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Australia
| | - Giovanni Defazio
- Department of Neurologic and Psychiatric Sciences, University of Bari, Italy
| | - Pablo Mir
- Unidad de Trastornos del Movimiento, Servicio de Neurología y Neurofisiología Clínica, Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío/CSIC/Universidad de Sevilla, Spain
| | - Kristina Simonyan
- Department of Neurology, Icahn School of Medicine at Mount Sinai New York City, New York, United States
| | - Laurie J Ozelius
- Department of Neurology, Massachusetts General Hospital, Boston, United States
| | - Norbert Brüggemann
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany; Department of Neurology, University of Lübeck, Lübeck, Germany
| | - Sun Ju Chung
- Department of Neurology, Asan Medical Center, University of Ulsan, Seoul, South Korea
| | | | - Katja Lohmann
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany.
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32
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Vos M, Geens A, Böhm C, Deaulmerie L, Swerts J, Rossi M, Craessaerts K, Leites EP, Seibler P, Rakovic A, Lohnau T, De Strooper B, Fendt SM, Morais VA, Klein C, Verstreken P. Cardiolipin promotes electron transport between ubiquinone and complex I to rescue PINK1 deficiency. J Cell Biol 2017; 216:695-708. [PMID: 28137779 PMCID: PMC5346965 DOI: 10.1083/jcb.201511044] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [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: 11/11/2015] [Revised: 11/25/2016] [Accepted: 01/05/2017] [Indexed: 02/08/2023] Open
Abstract
Parkinson’s disease–causing mutations in PINK1 yield mitochondrial defects including inefficient electron transport between complex I and ubiquinone. Vos et al. show that genetic and pharmacological inhibition of fatty acid synthase bypass these complex I defects in fly, mouse, and human Parkinson’s disease models. PINK1 is mutated in Parkinson’s disease (PD), and mutations cause mitochondrial defects that include inefficient electron transport between complex I and ubiquinone. Neurodegeneration is also connected to changes in lipid homeostasis, but how these are related to PINK1-induced mitochondrial dysfunction is unknown. Based on an unbiased genetic screen, we found that partial genetic and pharmacological inhibition of fatty acid synthase (FASN) suppresses toxicity induced by PINK1 deficiency in flies, mouse cells, patient-derived fibroblasts, and induced pluripotent stem cell–derived dopaminergic neurons. Lower FASN activity in PINK1 mutants decreases palmitate levels and increases the levels of cardiolipin (CL), a mitochondrial inner membrane–specific lipid. Direct supplementation of CL to isolated mitochondria not only rescues the PINK1-induced complex I defects but also rescues the inefficient electron transfer between complex I and ubiquinone in specific mutants. Our data indicate that genetic or pharmacologic inhibition of FASN to increase CL levels bypasses the enzymatic defects at complex I in a PD model.
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Affiliation(s)
- Melissa Vos
- VIB Center for Brain and Disease Research, 3000 Leuven, Belgium.,Department of Neurosciences and Leuven Research Institute for Neurodegenerative Disease, KU Leuven, 3000 Leuven, Belgium.,Institute of Neurogenetics, University of Luebeck, 23562 Luebeck, Germany
| | - Ann Geens
- VIB Center for Brain and Disease Research, 3000 Leuven, Belgium.,Department of Neurosciences and Leuven Research Institute for Neurodegenerative Disease, KU Leuven, 3000 Leuven, Belgium
| | - Claudia Böhm
- Institute of Neurogenetics, University of Luebeck, 23562 Luebeck, Germany
| | - Liesbeth Deaulmerie
- VIB Center for Brain and Disease Research, 3000 Leuven, Belgium.,Department of Neurosciences and Leuven Research Institute for Neurodegenerative Disease, KU Leuven, 3000 Leuven, Belgium
| | - Jef Swerts
- VIB Center for Brain and Disease Research, 3000 Leuven, Belgium.,Department of Neurosciences and Leuven Research Institute for Neurodegenerative Disease, KU Leuven, 3000 Leuven, Belgium
| | - Matteo Rossi
- VIB Center for Cancer Biology, 3000 Leuven, Belgium.,Department of Oncology and Leuven Cancer Institute, KU Leuven, 3000 Leuven, Belgium
| | - Katleen Craessaerts
- VIB Center for Brain and Disease Research, 3000 Leuven, Belgium.,Department of Neurosciences and Leuven Research Institute for Neurodegenerative Disease, KU Leuven, 3000 Leuven, Belgium
| | - Elvira P Leites
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649 Lisboa, Portugal
| | - Philip Seibler
- Institute of Neurogenetics, University of Luebeck, 23562 Luebeck, Germany
| | - Aleksandar Rakovic
- Institute of Neurogenetics, University of Luebeck, 23562 Luebeck, Germany
| | - Thora Lohnau
- Institute of Neurogenetics, University of Luebeck, 23562 Luebeck, Germany
| | - Bart De Strooper
- VIB Center for Brain and Disease Research, 3000 Leuven, Belgium.,Department of Neurosciences and Leuven Research Institute for Neurodegenerative Disease, KU Leuven, 3000 Leuven, Belgium
| | - Sarah-Maria Fendt
- VIB Center for Cancer Biology, 3000 Leuven, Belgium.,Department of Oncology and Leuven Cancer Institute, KU Leuven, 3000 Leuven, Belgium
| | - Vanessa A Morais
- VIB Center for Brain and Disease Research, 3000 Leuven, Belgium.,Department of Neurosciences and Leuven Research Institute for Neurodegenerative Disease, KU Leuven, 3000 Leuven, Belgium.,Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649 Lisboa, Portugal
| | - Christine Klein
- Institute of Neurogenetics, University of Luebeck, 23562 Luebeck, Germany
| | - Patrik Verstreken
- VIB Center for Brain and Disease Research, 3000 Leuven, Belgium .,Department of Neurosciences and Leuven Research Institute for Neurodegenerative Disease, KU Leuven, 3000 Leuven, Belgium
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Wortmann SB, Ziętkiewicz S, Kousi M, Szklarczyk R, Haack TB, Gersting SW, Muntau AC, Rakovic A, Renkema GH, Rodenburg RJ, Strom TM, Meitinger T, Rubio-Gozalbo ME, Chrusciel E, Distelmaier F, Golzio C, Jansen JH, van Karnebeek C, Lillquist Y, Lücke T, Õunap K, Zordania R, Yaplito-Lee J, van Bokhoven H, Spelbrink JN, Vaz FM, Pras-Raves M, Ploski R, Pronicka E, Klein C, Willemsen MAAP, de Brouwer APM, Prokisch H, Katsanis N, Wevers RA. CLPB mutations cause 3-methylglutaconic aciduria, progressive brain atrophy, intellectual disability, congenital neutropenia, cataracts, movement disorder. Am J Hum Genet 2015; 96:245-57. [PMID: 25597510 DOI: 10.1016/j.ajhg.2014.12.013] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [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: 11/17/2014] [Accepted: 12/10/2014] [Indexed: 01/04/2023] Open
Abstract
We studied a group of individuals with elevated urinary excretion of 3-methylglutaconic acid, neutropenia that can develop into leukemia, a neurological phenotype ranging from nonprogressive intellectual disability to a prenatal encephalopathy with progressive brain atrophy, movement disorder, cataracts, and early death. Exome sequencing of two unrelated individuals and subsequent Sanger sequencing of 16 individuals with an overlapping phenotype identified a total of 14 rare, predicted deleterious alleles in CLPB in 14 individuals from 9 unrelated families. CLPB encodes caseinolytic peptidase B homolog ClpB, a member of the AAA+ protein family. To evaluate the relevance of CLPB in the pathogenesis of this syndrome, we developed a zebrafish model and an in vitro assay to measure ATPase activity. Suppression of clpb in zebrafish embryos induced a central nervous system phenotype that was consistent with cerebellar and cerebral atrophy that could be rescued by wild-type, but not mutant, human CLPB mRNA. Consistent with these data, the loss-of-function effect of one of the identified variants (c.1222A>G [p.Arg408Gly]) was supported further by in vitro evidence with the mutant peptides abolishing ATPase function. Additionally, we show that CLPB interacts biochemically with ATP2A2, known to be involved in apoptotic processes in severe congenital neutropenia (SCN) 3 (Kostmann disease [caused by HAX1 mutations]). Taken together, mutations in CLPB define a syndrome with intellectual disability, congenital neutropenia, progressive brain atrophy, movement disorder, cataracts, and 3-methylglutaconic aciduria.
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Affiliation(s)
- Saskia B Wortmann
- Nijmegen Centre for Mitochondrial Disorders (NCMD), Amalia Children's Hospital, Radboudumc, 6500HB Nijmegen, the Netherlands.
| | - Szymon Ziętkiewicz
- Department of Molecular and Cellular Biology, Intercollegiate Faculty of Biotechnology, University of Gdańsk, Kładki str. 24, 80822 Gdańsk, Poland
| | - Maria Kousi
- Center for Human Disease Modeling, Duke University Medical Center, Durham, NC 27710, USA
| | - Radek Szklarczyk
- Clinical Genomics, Maastricht UMC+, PO Box 616, 6200MD Maastricht, the Netherlands
| | - Tobias B Haack
- Institute of Human Genetics, Helmholtz Zentrum Munich, 85764 Neuherberg, Germany; Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany
| | - Søren W Gersting
- Department of Molecular Pediatrics, Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University, 80337 Munich, Germany
| | - Ania C Muntau
- Department of Pediatrics, University Children's Hospital, University Medical Center Eppendorf, 20246 Hamburg, Germany
| | | | - G Herma Renkema
- Nijmegen Centre for Mitochondrial Disorders (NCMD), Amalia Children's Hospital, Radboudumc, 6500HB Nijmegen, the Netherlands
| | - Richard J Rodenburg
- Nijmegen Centre for Mitochondrial Disorders (NCMD), Amalia Children's Hospital, Radboudumc, 6500HB Nijmegen, the Netherlands
| | - Tim M Strom
- Institute of Human Genetics, Helmholtz Zentrum Munich, 85764 Neuherberg, Germany; Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany
| | - Thomas Meitinger
- Institute of Human Genetics, Helmholtz Zentrum Munich, 85764 Neuherberg, Germany; Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany
| | - M Estela Rubio-Gozalbo
- Departments of Pediatrics and Laboratory Genetic Metabolic Diseases, Maastricht University Medical Center, 6202AZ Maastricht, the Netherlands
| | - Elzbieta Chrusciel
- Department of Molecular and Cellular Biology, Intercollegiate Faculty of Biotechnology, University of Gdańsk, Kładki str. 24, 80822 Gdańsk, Poland
| | - Felix Distelmaier
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, University Children's Hospital, Heinrich-Heine University, Moorenstr. 5, 40225 Düsseldorf, Germany
| | - Christelle Golzio
- Center for Human Disease Modeling, Duke University Medical Center, Durham, NC 27710, USA
| | - Joop H Jansen
- Department of Laboratory Medicine, Laboratory of Hematology, Radboudumc, 6525GA Nijmegen, the Netherlands
| | - Clara van Karnebeek
- Division of Biochemical Diseases, Department of Pediatrics, B.C. Children's Hospital, Treatable Intellectual Disability Endeavour, Vancouver, BC V6H 3N4, Canada; Child and Family Research Institute, Centre for Molecular Medicine & Therapeutics, University of British Columbia, Vancouver, BC V5Z 4H4, Canada
| | - Yolanda Lillquist
- Division of Biochemical Diseases, Department of Pediatrics, B.C. Children's Hospital, Treatable Intellectual Disability Endeavour, Vancouver, BC V6H 3N4, Canada
| | - Thomas Lücke
- Department of Neuropediatrics, University Children's Hospital, Ruhr University Bochum, 44791 Bochum, Germany
| | - Katrin Õunap
- Department of Genetics, United Laboratories, Tartu University Hospital, Tartu 51014, Estonia
| | - Riina Zordania
- Department of Genetics, United Laboratories, Tartu University Hospital, Tartu 51014, Estonia
| | - Joy Yaplito-Lee
- Metabolic Genetics, Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville, VIC 3052, Australia
| | - Hans van Bokhoven
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboudumc, 6500HB Nijmegen, the Netherlands
| | - Johannes N Spelbrink
- Nijmegen Centre for Mitochondrial Disorders (NCMD), Amalia Children's Hospital, Radboudumc, 6500HB Nijmegen, the Netherlands; BioMediTech, University of Tampere, 33014 Tampere, Finland
| | - Frédéric M Vaz
- Department of Clinical Chemistry and Pediatrics, Laboratory Genetic Metabolic Disease, Academic Medical Center, 1100AZ Amsterdam, the Netherlands
| | - Mia Pras-Raves
- Department of Clinical Chemistry and Pediatrics, Laboratory Genetic Metabolic Disease, Academic Medical Center, 1100AZ Amsterdam, the Netherlands
| | - Rafal Ploski
- Department of Medical Genetics, Warsaw Medical University, 02-106 Warsaw, Poland
| | - Ewa Pronicka
- Department of Pediatrics, Nutrition and Metabolic Diseases, Department of Medical Genetics, Children's Memorial Health Institute, 20 Aleja Dzieci Polskich, 04-730 Warsaw, Poland
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, 23562 Lübeck, Germany
| | | | - Arjan P M de Brouwer
- Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboudumc, 6500HB Nijmegen, the Netherlands
| | - Holger Prokisch
- Institute of Human Genetics, Helmholtz Zentrum Munich, 85764 Neuherberg, Germany; Institute of Human Genetics, Technische Universität München, 81675 Munich, Germany
| | - Nicholas Katsanis
- Center for Human Disease Modeling, Duke University Medical Center, Durham, NC 27710, USA
| | - Ron A Wevers
- Department of Laboratory Medicine, Translational Metabolic Laboratory, Radboudumc, 6525GA Nijmegen, the Netherlands
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Kumar KR, Weyers S, Wilcox RA, Park JS, Rakovic A, Klein C, Mackay-Sim A, Sue CM. 3. J Clin Neurosci 2014. [DOI: 10.1016/j.jocn.2014.06.017] [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: 12/01/2022]
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35
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Erogullari A, Hollstein R, Seibler P, Braunholz D, Koschmidder E, Depping R, Eckhold J, Lohnau T, Gillessen-Kaesbach G, Grünewald A, Rakovic A, Lohmann K, Kaiser FJ. THAP1, the gene mutated in DYT6 dystonia, autoregulates its own expression. Biochim Biophys Acta 2014; 1839:1196-204. [PMID: 25088175 DOI: 10.1016/j.bbagrm.2014.07.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Revised: 07/22/2014] [Accepted: 07/24/2014] [Indexed: 02/07/2023]
Abstract
THAP1 encodes a transcription factor but its regulation is largely elusive. TOR1A was shown to be repressed by THAP1 in vitro. Notably, mutations in both of these genes lead to dystonia (DYT6 or DYT1). Surprisingly, expressional changes of TOR1A in THAP1 mutation carriers have not been detected indicating additional levels of regulation. Here, we investigated whether THAP1 is able to autoregulate its own expression. Using in-silico prediction, luciferase reporter gene assays, and (quantitative) chromatin immunoprecipitation (ChIP), we defined the THAP1 minimal promoter to a 480bp-fragment and demonstrated specific binding of THAP1 to this region which resulted in repression of the THAP1 promoter. This autoregulation was disturbed by different DYT6-causing mutations. Two mutants (Ser6Phe, Arg13His) were shown to be less stable than wildtype THAP1 adding to the effect of reduced binding to the THAP1 promoter. Overexpressed THAP1 is preferably degraded through the proteasome. Notably, endogenous THAP1 expression was significantly reduced in cells overexpressing wildtype THAP1 as demonstrated by quantitative PCR. In contrast, higher THAP1 levels were detected in induced pluripotent stem cell (iPS)-derived neurons from THAP1 mutation carriers. Thus, we identified a feedback-loop in the regulation of THAP1 expression and demonstrated that mutant THAP1 leads to higher THAP1 expression levels. This compensatory autoregulation may contribute to the mean age at onset in the late teen years or even reduced penetrance in some THAP1 mutation carriers.
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Affiliation(s)
- Alev Erogullari
- Sektion für Funktionelle Genetik am Institut für Humangenetik, University of Luebeck, Luebeck 23538, Germany
| | - Ronja Hollstein
- Sektion für Funktionelle Genetik am Institut für Humangenetik, University of Luebeck, Luebeck 23538, Germany
| | - Philip Seibler
- Institute of Neurogenetics, University of Luebeck, Luebeck 23538, Germany
| | - Diana Braunholz
- Sektion für Funktionelle Genetik am Institut für Humangenetik, University of Luebeck, Luebeck 23538, Germany
| | - Eva Koschmidder
- Institute of Neurogenetics, University of Luebeck, Luebeck 23538, Germany
| | - Reinhard Depping
- Institute of Physiology, Center of Structural and Cell Biology in Medicine, University of Luebeck, Luebeck 23538, Germany
| | - Juliane Eckhold
- Sektion für Funktionelle Genetik am Institut für Humangenetik, University of Luebeck, Luebeck 23538, Germany; Institut für Humangenetik, University of Luebeck, Luebeck 23538, Germany
| | - Thora Lohnau
- Institute of Neurogenetics, University of Luebeck, Luebeck 23538, Germany
| | | | - Anne Grünewald
- Institute of Neurogenetics, University of Luebeck, Luebeck 23538, Germany
| | - Aleksandar Rakovic
- Institute of Neurogenetics, University of Luebeck, Luebeck 23538, Germany
| | - Katja Lohmann
- Institute of Neurogenetics, University of Luebeck, Luebeck 23538, Germany.
| | - Frank J Kaiser
- Sektion für Funktionelle Genetik am Institut für Humangenetik, University of Luebeck, Luebeck 23538, Germany
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36
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Vulinovic F, Lohmann K, Rakovic A, Capetian P, Alvarez-Fischer D, Schmidt A, Weißbach A, Erogullari A, Kaiser FJ, Wiegers K, Ferbert A, Rolfs A, Klein C, Seibler P. Unraveling cellular phenotypes of novel TorsinA/TOR1A mutations. Hum Mutat 2014; 35:1114-22. [PMID: 24931141 DOI: 10.1002/humu.22604] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 06/04/2014] [Indexed: 01/17/2023]
Abstract
A three-nucleotide (GAG) deletion (ΔE) in TorsinA (TOR1A) has been identified as the most common cause of dominantly inherited early-onset torsion dystonia (DYT1). TOR1A encodes a chaperone-like AAA+-protein localized in the endoplasmic reticulum. Currently, only three additional, likely mutations have been reported in single dystonia patients. Here, we report two new, putative TOR1A mutations (p.A14_P15del and p.E121K) that we examined functionally in comparison with wild-type (WT) protein and two known mutations (ΔE and p.R288Q). While inclusion formation is a characteristic feature for ΔE TOR1A, elevated levels of aggregates for other mutations were not observed when compared with WT TOR1A. WT and mutant TOR1A showed preferred degradation through the autophagy-lysosome pathway, which is most pronounced for p.A14_P15del, p.R288Q, and ΔE TOR1A. Notably, blocking of the autophagy pathway with bafilomycin resulted in a significant increase in inclusion formation in p.E121K TOR1A. In addition, all variants had an influence on protein stability. Although the p.A14_P15del mutation affects the proposed oligomerization domain of TOR1A, this mutation did not disturb the ability to dimerize. Our findings demonstrate functional changes for all four mutations on different levels. Thus, both diagnostic and research genetic screening of dystonia patients should not be limited to testing for the ∆E mutation.
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Affiliation(s)
- Franca Vulinovic
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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Jandric S, Rakovic A, Stijepic I. Handball and angular knee deformities in schoolgirls. Ann Phys Rehabil Med 2014. [DOI: 10.1016/j.rehab.2014.03.729] [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: 10/25/2022]
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38
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Deuse T, Hua X, Wang D, Maegdefessel L, Heeren J, Scheja L, Bolaños JP, Rakovic A, Spin JM, Stubbendorff M, Ikeno F, Länger F, Zeller T, Schulte-Uentrop L, Stoehr A, Itagaki R, Haddad F, Eschenhagen T, Blankenberg S, Kiefmann R, Reichenspurner H, Velden J, Klein C, Yeung A, Robbins RC, Tsao PS, Schrepfer S. Dichloroacetate prevents restenosis in preclinical animal models of vessel injury. Nature 2014; 509:641-4. [PMID: 24747400 DOI: 10.1038/nature13232] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2013] [Accepted: 03/06/2014] [Indexed: 11/09/2022]
Abstract
Despite the introduction of antiproliferative drug-eluting stents, coronary heart disease remains the leading cause of death in the United States. In-stent restenosis and bypass graft failure are characterized by excessive smooth muscle cell (SMC) proliferation and concomitant myointima formation with luminal obliteration. Here we show that during the development of myointimal hyperplasia in human arteries, SMCs show hyperpolarization of their mitochondrial membrane potential (ΔΨm) and acquire a temporary state with a high proliferative rate and resistance to apoptosis. Pyruvate dehydrogenase kinase isoform 2 (PDK2) was identified as a key regulatory protein, and its activation proved necessary for relevant myointima formation. Pharmacologic PDK2 blockade with dichloroacetate or lentiviral PDK2 knockdown prevented ΔΨm hyperpolarization, facilitated apoptosis and reduced myointima formation in injured human mammary and coronary arteries, rat aortas, rabbit iliac arteries and swine (pig) coronary arteries. In contrast to several commonly used antiproliferative drugs, dichloroacetate did not prevent vessel re-endothelialization. Targeting myointimal ΔΨm and alleviating apoptosis resistance is a novel strategy for the prevention of proliferative vascular diseases.
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Affiliation(s)
- Tobias Deuse
- 1] TSI-laboratory, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany [2] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany [3] Cardiovascular Surgery, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany
| | - Xiaoqin Hua
- 1] TSI-laboratory, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany [2] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Dong Wang
- 1] TSI-laboratory, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany [2] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Lars Maegdefessel
- Department of Medicine, Atherosclerosis Research Unit, Karolinska Institute, CMM L8:03, 17176 Stockholm, Sweden
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Juan P Bolaños
- Institute of Functional Biology and Genomics, University of Salamanca-CSIC, Zacarias Gonzalez 2, 37007 Salamanca, Spain
| | - Aleksandar Rakovic
- Institute of Neurogenetics, University of Lübeck, Maria-Goeppert-Straße 1, 23562 Lübeck, Germany
| | - Joshua M Spin
- Cardiovascular Medicine and Stanford Cardiovascular Institute, Stanford University, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Mandy Stubbendorff
- 1] TSI-laboratory, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany [2] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Fumiaki Ikeno
- Cardiovascular Medicine and Stanford Cardiovascular Institute, Stanford University, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Florian Länger
- Institute of Pathology, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany
| | - Tanja Zeller
- 1] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany [2] Department of General and Interventional Cardiology, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany
| | - Leonie Schulte-Uentrop
- 1] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany [2] Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Andrea Stoehr
- 1] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany [2] Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Ryo Itagaki
- 1] TSI-laboratory, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany [2] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Francois Haddad
- Cardiovascular Medicine and Stanford Cardiovascular Institute, Stanford University, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Thomas Eschenhagen
- 1] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany [2] Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Stefan Blankenberg
- 1] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany [2] Department of General and Interventional Cardiology, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany
| | - Rainer Kiefmann
- 1] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany [2] Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany
| | - Hermann Reichenspurner
- 1] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany [2] Cardiovascular Surgery, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany
| | - Joachim Velden
- Department of Nephropathology, Institute of Pathology, University Hospital Erlangen, Krankenhausstraße 8-10, 91054 Erlangen, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Maria-Goeppert-Straße 1, 23562 Lübeck, Germany
| | - Alan Yeung
- Cardiovascular Medicine and Stanford Cardiovascular Institute, Stanford University, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Robert C Robbins
- Department of Cardiothoracic Surgery and Stanford Cardiovascular Institute, Stanford University, 300 Pasteur Drive, Stanford, California 94305, USA
| | - Philip S Tsao
- 1] Cardiovascular Medicine and Stanford Cardiovascular Institute, Stanford University, 300 Pasteur Drive, Stanford, California 94305, USA [2] Veterans Affairs Palo Alto Health Care System, 3801 Miranda Avenue, Palo Alto, California 94304, USA
| | - Sonja Schrepfer
- 1] TSI-laboratory, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany [2] Cardiovascular Research Center Hamburg (CVRC) and DZHK (German Center for Cardiovascular Research), partner site Hamburg/Kiel/Luebeck, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246 Hamburg, Germany [3] Cardiovascular Surgery, University Heart Center Hamburg, Martinistraße 52, 20246 Hamburg, Germany [4] Department of Cardiothoracic Surgery and Stanford Cardiovascular Institute, Stanford University, 300 Pasteur Drive, Stanford, California 94305, USA
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Lohmann K, Wilcox RA, Winkler S, Ramirez A, Rakovic A, Park JS, Arns B, Lohnau T, Groen J, Kasten M, Brüggemann N, Hagenah J, Schmidt A, Kaiser FJ, Kumar KR, Zschiedrich K, Alvarez-Fischer D, Altenmüller E, Ferbert A, Lang AE, Münchau A, Kostic V, Simonyan K, Agzarian M, Ozelius LJ, Langeveld APM, Sue CM, Tijssen MAJ, Klein C. Whispering dysphonia (DYT4 dystonia) is caused by a mutation in the TUBB4 gene. Ann Neurol 2013; 73:537-45. [PMID: 23595291 DOI: 10.1002/ana.23829] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 11/13/2012] [Accepted: 11/30/2012] [Indexed: 12/19/2022]
Abstract
OBJECTIVE A study was undertaken to identify the gene underlying DYT4 dystonia, a dominantly inherited form of spasmodic dysphonia combined with other focal or generalized dystonia and a characteristic facies and body habitus, in an Australian family. METHODS Genome-wide linkage analysis was carried out in 14 family members followed by genome sequencing in 2 individuals. The index patient underwent a detailed neurological follow-up examination, including electrophysiological studies and magnetic resonance imaging scanning. Biopsies of the skin and olfactory mucosa were obtained, and expression levels of TUBB4 mRNA were determined by quantitative real-time polymerase chain reaction in 3 different cell types. All exons of TUBB4 were screened for mutations in 394 unrelated dystonia patients. RESULTS The disease-causing gene was mapped to a 23cM region on chromosome 19p13.3-p13.2 with a maximum multipoint LOD score of 5.338 at markers D9S427 and D9S1034. Genome sequencing revealed a missense variant in the TUBB4 (tubulin beta-4; Arg2Gly) gene as the likely cause of disease. Sequencing of TUBB4 in 394 unrelated dystonia patients revealed another missense variant (Ala271Thr) in a familial case of segmental dystonia with spasmodic dysphonia. mRNA expression studies demonstrated significantly reduced levels of mutant TUBB4 mRNA in different cell types from a heterozygous Arg2Gly mutation carrier compared to controls. INTERPRETATION A mutation in TUBB4 causes DYT4 dystonia in this Australian family with so-called whispering dysphonia, and other mutations in TUBB4 may contribute to spasmodic dysphonia. Given that TUBB4 is a neuronally expressed tubulin, our results imply abnormal microtubule function as a novel mechanism in the pathophysiology of dystonia.
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Affiliation(s)
- Katja Lohmann
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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Rakovic A, Shurkewitsch K, Seibler P, Grünewald A, Zanon A, Hagenah J, Krainc D, Klein C. Phosphatase and tensin homolog (PTEN)-induced putative kinase 1 (PINK1)-dependent ubiquitination of endogenous Parkin attenuates mitophagy: study in human primary fibroblasts and induced pluripotent stem cell-derived neurons. J Biol Chem 2012; 288:2223-37. [PMID: 23212910 DOI: 10.1074/jbc.m112.391680] [Citation(s) in RCA: 169] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Mutations in the E3 ubiquitin ligase Parkin and the mitochondrial PTEN-induced putative kinase 1 (PINK1) have been identified to cause autosomal recessive forms of familial Parkinson disease, with PINK1 functioning upstream of Parkin in a pathway important for the maintenance of mitochondrial function and morphology. Upon the loss of the mitochondrial membrane potential, Parkin translocates to mitochondria in a PINK1-dependent manner to ubiquitinate mitochondrial proteins. Parkin-mediated polyubiquitination of outer mitochondrial membrane (OMM) proteins recruits the ubiquitin- and LC3-binding adaptor protein p62 to mitochondria and induces mitophagy. Although previous studies examined mitophagy in established cell lines through overexpression approaches, there is an imperative to study the role of endogenous Parkin and PINK1 in human-derived and biologically relevant cell models. Here, we demonstrate in human primary fibroblasts and induced pluripotent stem-derived neurons from controls and PINK1 mutation carriers that endogenous levels of Parkin are not sufficient to initiate mitophagy upon loss of the mitochondrial membrane potential, caused by its (self-)ubiquitination, followed by degradation via the ubiquitin proteasome system. Next, we showed differential PINK1-dependent, Parkin-mediated ubiquitination of OMM proteins, which is Parkin dose-dependent and affects primarily OMM proteins of higher molecular mass. In contrast to the situation fibroblasts, we did not detect mitophagy in induced pluripotent stem-derived neurons even upon overexpression of Parkin. Taken together, our data demonstrate that mitophagy differs between human non-neuronal and neuronal cells and between "endogenous" and "Parkin-overexpressing" cellular models.
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Affiliation(s)
- Aleksandar Rakovic
- Section of Clinical and Molecular Neurogenetics at the Department of Neurology, University of Lübeck, 23562 Lübeck, Germany
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41
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Deuse T, Hua X, Länger F, Gossler T, Stubbendorff M, Rakovic A, Klein C, Sutendra G, Dromparis P, Maegdefessel L, Tsao P, Velden J, Reichenspurner H, Robbins R, Haddad F, Michelakis E, Schrepfer S. 356 Pyruvate Dehydrogenase Kinase 2 Controls Vascular Remodeling. J Heart Lung Transplant 2012. [DOI: 10.1016/j.healun.2012.01.365] [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: 10/28/2022] Open
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42
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Deuse T, Hua X, Laenger F, Gossler T, Stubbendorff M, Rakovic A, Klein C, Sutendra G, Dromparis P, Maegdefessel L, Tsao PS, Velden J, Reichenspurner H, Robbins RC, Haddad F, Michelakis E, Schrepfer S. Pyruvate dehydrogenase kinase 2 controls the development of intimal hyperplasia. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297433] [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: 10/14/2022]
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43
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Grünewald A, Arns B, Seibler P, Rakovic A, Münchau A, Ramirez A, Sue CM, Klein C. ATP13A2 mutations impair mitochondrial function in fibroblasts from patients with Kufor-Rakeb syndrome. Neurobiol Aging 2012; 33:1843.e1-7. [PMID: 22296644 DOI: 10.1016/j.neurobiolaging.2011.12.035] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 12/13/2011] [Accepted: 12/28/2011] [Indexed: 11/29/2022]
Abstract
Mutations in ATP13A2 cause autosomal-recessive parkinsonism (Kufor-Rakeb syndrome; KRS). Because several other parkinsonism-associated proteins have been connected to mitochondrial function and mitophagy, we studied the impact of endogenous mutations in ATPase type 13A2 (ATP13A2) on mitochondria in fibroblasts from KRS patients compared with controls. In patients, we detected decreased adenosine triphosphate (ATP) synthesis rates, increased mitochondrial DNA levels, a higher frequency of mitochondrial DNA lesions, increased oxygen consumption rates, and increased fragmentation of the mitochondrial network. Importantly, overexpression of wild-type ATP13A2 rescued the respiration phenotype. These findings collectively suggest that ATP13A2 contributes to the maintenance of a healthy mitochondrial pool, supporting the hypothesis that impaired mitochondrial clearance represents an important pathogenic mechanism underlying KRS.
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Affiliation(s)
- Anne Grünewald
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Lübeck, Germany
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Radovanovic D, Ponorac N, Ignjatovic A, Stojiljkovic N, Popovic T, Rakovic A. Specific alterations of physiological parameters in competitive race walkers. Acta Physiol Hung 2011; 98:449-455. [PMID: 22173026 DOI: 10.1556/aphysiol.98.2011.4.8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Race walking is the technical and athletic expression of fast walking and it can be considered as a type of endurance performance. The purpose of this study was to examine whether 12 weeks of a specially designed training program results in the further training enhancement of endurance performance and the related physiological parameters in already well-trained race walkers competing at the national and international level. The investigation protocol consisted of determining the maximal oxygen uptake (VO2peak) and related gas exchange values using an automated cardiopulmonary exercise system and of determining blood lactate variables (aerobic threshold - LTAer and the maximal lactate steady state - MLSS) during walking with proper technique at 8, 10, 12 and 14 km·h-1 for 4 minutes without rest in between. Thereafter, the speed on the treadmill was increased by 0.5 km·h-1 every two minutes until exhaustion to determine VO2peak. After 12 weeks of a specially designed endurance training, statistically significant increases in VO2peak (61.8±8.5 mL·kg-1·min-1 pre vs. 66.9±9.5 mL·kg-1·min-1 post training; p<0.05) and blood lactate variables (VO2-LTAer and VO2-MLSS; p<0.05) were noted. The obtained results suggest that the applied training program can improve endurance and race performance in previously well trained race walkers.
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Affiliation(s)
- Dragan Radovanovic
- Faculty of Sport and Physical Education, University of Nis, Nis, Serbia.
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Osmanovic A, Dendorfer A, Erogullari A, Uflacker N, Braunholz D, Rakovic A, Vierke G, Gil-Rodríguez C, Münchau A, Albrecht M, Brüggemann N, Gillessen-Kaesbach G, Klein C, Lohmann K, Kaiser FJ. Truncating mutations in THAP1 define the nuclear localization signal. Mov Disord 2011; 26:1565-7. [PMID: 21495072 DOI: 10.1002/mds.23611] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2010] [Revised: 10/26/2010] [Accepted: 11/29/2010] [Indexed: 11/10/2022] Open
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Rakovic A, Grünewald A, Voges L, Hofmann S, Orolicki S, Lohmann K, Klein C. PINK1-Interacting Proteins: Proteomic Analysis of Overexpressed PINK1. Parkinsons Dis 2011; 2011:153979. [PMID: 21437181 PMCID: PMC3062077 DOI: 10.4061/2011/153979] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Accepted: 12/22/2010] [Indexed: 11/20/2022]
Abstract
Recent publications suggest that the Parkinson's disease- (PD-) related PINK1/Parkin pathway promotes elimination of dysfunctional mitochondria by autophagy. We used tandem affinity purification (TAP), SDS-PAGE, and mass spectrometry as a first step towards identification of possible substrates for PINK1. The cellular abundance of selected identified interactors was investigated by Western blotting. Furthermore, one candidate gene was sequenced in 46 patients with atypical PD. In addition to two known binding partners (HSP90, CDC37), 12 proteins were identified using the TAP assay; four of which are mitochondrially localized (GRP75, HSP60, LRPPRC, and TUFM). Western blot analysis showed no differences in cellular abundance of these proteins comparing PINK1 mutant and control fibroblasts. When sequencing LRPPRC, four exonic synonymous changes and 20 polymorphisms in noncoding regions were detected. Our study provides a list of putative PINK1 binding partners, confirming previously described interactions, but also introducing novel mitochondrial proteins as potential components of the PINK1/Parkin mitophagy pathway.
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Affiliation(s)
- Aleksandar Rakovic
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Maria-Goeppert-Straße 1, 23562 Lübeck, Germany
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Kaiser FJ, Osmanoric A, Rakovic A, Erogullari A, Uflacker N, Braunholz D, Lohnau T, Orolicki S, Albrecht M, Gillessen-Kaesbach G, Klein C, Lohmann K. The dystonia gene DYT1 is repressed by the transcription factor THAP1 (DYT6). Ann Neurol 2010; 68:554-9. [DOI: 10.1002/ana.22157] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Grünewald A, Voges L, Rakovic A, Kasten M, Vandebona H, Hemmelmann C, Lohmann K, Orolicki S, Ramirez A, Schapira AHV, Pramstaller PP, Sue CM, Klein C. Mutant Parkin impairs mitochondrial function and morphology in human fibroblasts. PLoS One 2010; 5:e12962. [PMID: 20885945 PMCID: PMC2946349 DOI: 10.1371/journal.pone.0012962] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [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: 07/01/2010] [Accepted: 09/02/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Mutations in Parkin are the most common cause of autosomal recessive Parkinson disease (PD). The mitochondrially localized E3 ubiquitin-protein ligase Parkin has been reported to be involved in respiratory chain function and mitochondrial dynamics. More recent publications also described a link between Parkin and mitophagy. METHODOLOGY/PRINCIPAL FINDINGS In this study, we investigated the impact of Parkin mutations on mitochondrial function and morphology in a human cellular model. Fibroblasts were obtained from three members of an Italian PD family with two mutations in Parkin (homozygous c.1072delT, homozygous delEx7, compound-heterozygous c.1072delT/delEx7), as well as from two relatives without mutations. Furthermore, three unrelated compound-heterozygous patients (delEx3-4/duplEx7-12, delEx4/c.924C>T and delEx1/c.924C>T) and three unrelated age-matched controls were included. Fibroblasts were cultured under basal or paraquat-induced oxidative stress conditions. ATP synthesis rates and cellular levels were detected luminometrically. Activities of complexes I-IV and citrate synthase were measured spectrophotometrically in mitochondrial preparations or cell lysates. The mitochondrial membrane potential was measured with 5,5',6,6'-tetrachloro-1,1',3,3'-tetraethylbenzimidazolylcarbocyanine iodide. Oxidative stress levels were investigated with the OxyBlot technique. The mitochondrial network was investigated immunocytochemically and the degree of branching was determined with image processing methods. We observed a decrease in the production and overall concentration of ATP coinciding with increased mitochondrial mass in Parkin-mutant fibroblasts. After an oxidative insult, the membrane potential decreased in patient cells but not in controls. We further determined higher levels of oxidized proteins in the mutants both under basal and stress conditions. The degree of mitochondrial network branching was comparable in mutants and controls under basal conditions and decreased to a similar extent under paraquat-induced stress. CONCLUSIONS Our results indicate that Parkin mutations cause abnormal mitochondrial function and morphology in non-neuronal human cells.
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Affiliation(s)
- Anne Grünewald
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Lübeck, Germany
- Department of Neurogenetics, Kolling Institute of Medical Research, Royal North Shore Hospital and University of Sydney, Sydney, New South Wales, Australia
| | - Lisa Voges
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Lübeck, Germany
| | - Aleksandar Rakovic
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Lübeck, Germany
| | - Meike Kasten
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Lübeck, Germany
| | - Himesha Vandebona
- Department of Neurogenetics, Kolling Institute of Medical Research, Royal North Shore Hospital and University of Sydney, Sydney, New South Wales, Australia
| | - Claudia Hemmelmann
- Institute for Medical Biometry and Statistics, University of Lübeck, Lübeck, Germany
| | - Katja Lohmann
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Lübeck, Germany
| | - Slobodanka Orolicki
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Lübeck, Germany
| | - Alfredo Ramirez
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Lübeck, Germany
| | - Anthony H. V. Schapira
- Department of Clinical Neurosciences, Institute of Neurology, University College London, London, United Kingdom
| | | | - Carolyn M. Sue
- Department of Neurogenetics, Kolling Institute of Medical Research, Royal North Shore Hospital and University of Sydney, Sydney, New South Wales, Australia
| | - Christine Klein
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, Lübeck, Germany
- * E-mail:
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Rakovic A, Grünewald A, Seibler P, Ramirez A, Kock N, Orolicki S, Lohmann K, Klein C. Effect of endogenous mutant and wild-type PINK1 on Parkin in fibroblasts from Parkinson disease patients. Hum Mol Genet 2010; 19:3124-37. [PMID: 20508036 DOI: 10.1093/hmg/ddq215] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Mutations in the PTEN-induced putative kinase 1 (PINK1), a mitochondrial serine-threonine kinase, and Parkin, an E3 ubiquitin ligase, are associated with autosomal-recessive forms of Parkinson disease (PD). Both are involved in the maintenance of mitochondrial integrity and protection from multiple stressors. Recently, Parkin was demonstrated to be recruited to impaired mitochondria in a PINK1-dependent manner, where it triggers mitophagy. Using primary human dermal fibroblasts originating from PD patients with various PINK1 mutations, we showed at the endogenous level that (i) PINK1 regulates the stress-induced decrease of endogenous Parkin; (ii) mitochondrially localized PINK1 mediates the stress-induced mitochondrial translocation of Parkin; (iii) endogenous PINK1 is stabilized on depolarized mitochondria; and (iv) mitochondrial accumulation of full-length PINK1 is sufficient but not necessary for the stress-induced loss of Parkin signal and its mitochondrial translocation. Furthermore, we showed that different stressors, depolarizing or non-depolarizing, led to the same effect on detectable Parkin levels and its mitochondrial targeting. Although this effect on Parkin was independent of the mitochondrial membrane potential, we demonstrate a differential effect of depolarizing versus non-depolarizing stressors on endogenous levels of PINK1. Our study shows the necessity to introduce an environmental factor, i.e. stress, to visualize the differences in the interaction of PINK1 and Parkin in mutants versus controls. Establishing human fibroblasts as a suitable model for studying this interaction, we extend data from animal and other cellular models and provide experimental evidence for the generally held notion of PD as a condition with a combined genetic and environmental etiology.
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Affiliation(s)
- Aleksandar Rakovic
- Section of Clinical and Molecular Neurogenetics, Department of Neurology, University of Lübeck, 23562 Lübeck, Germany
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Orolicki S, Grunewald A, Rakovic A, Seibler P, Lohmann K, Kock N, Klein C. Evidence for a role of the Bcl-2 family in the pathophysiology of Parkin-associated parkinsonism using a human fibroblast model. Akt Neurol 2009. [DOI: 10.1055/s-0029-1238561] [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: 10/20/2022]
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