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Morez M, Lara Ordóñez AJ, Melnyk P, Liberelle M, Lebègue N, Taymans JM. Leucine-rich repeat kinase 2 (LRRK2) inhibitors for Parkinson's disease: a patent review of the literature to date. Expert Opin Ther Pat 2024; 34:773-788. [PMID: 39023243 DOI: 10.1080/13543776.2024.2378076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Accepted: 07/04/2024] [Indexed: 07/20/2024]
Abstract
INTRODUCTION Nearly two decades after leucine rich repeat kinase 2 (LRRK2) was discovered as a genetic determinant of Parkinson's disease (PD), LRRK2 has emerged a priority therapeutic target in PD and inhibition of its activity is hypothesized to be beneficial. AREAS COVERED LRRK2 targeting agents, in particular kinase inhibitors and agents reducing LRRK2 expression show promise in model systems and have progressed to phase I and phase II clinical testing for PD. Several additional targeting strategies for LRRK2 are emerging, based on promoting specific 'healthy' LRRK2 quaternary structures, heteromeric complexes and conformations. EXPERT OPINION It can be expected that LRRK2 targeting strategies may proceed to phase III clinical testing for PD in the next five years, allowing the field to discover the real clinical value of LRRK2 targeting strategies.
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Affiliation(s)
- Margaux Morez
- University Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | | | - Patricia Melnyk
- University Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | - Maxime Liberelle
- University Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | - Nicolas Lebègue
- University Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | - Jean-Marc Taymans
- University Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
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Pena N, Richbourg T, Gonzalez-Hunt CP, Qi R, Wren P, Barlow C, Shanks NF, Carlisle HJ, Sanders LH. G2019S selective LRRK2 kinase inhibitor abrogates mitochondrial DNA damage. NPJ Parkinsons Dis 2024; 10:49. [PMID: 38429321 PMCID: PMC10907374 DOI: 10.1038/s41531-024-00660-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 02/14/2024] [Indexed: 03/03/2024] Open
Abstract
Pathogenic mutations in LRRK2 cause Parkinson's disease (PD). The G2019S variant is the most common, which results in abnormally high kinase activity. Compounds that target LRRK2 kinase activity are currently being developed and tested in clinical trials. We recently found that G2019S LRRK2 causes mitochondrial DNA (mtDNA) damage and treatment with multiple classes of LRRK2 kinase inhibitors at concentrations associated with dephosphorylation of LRRK2 reversed mtDNA damage to healthy control levels. Because maintaining the normal function of LRRK2 in heterozygous G2019S LRRK2 carriers while specifically targeting the G2019S LRRK2 activity could have an advantageous safety profile, we explored the efficacy of a G2019S mutant selective LRRK2 inhibitor to reverse mtDNA damage in G2019S LRRK2 models and patient cells relative to non-selective LRRK2 inhibitors. Potency of LRRK2 kinase inhibition by EB-42168, a G2019S mutant LRRK2 kinase inhibitor, and MLi-2, a non-selective inhibitor, was determined by measuring phosphorylation of LRRK2 at Ser935 and/or Ser1292 using quantitative western immunoblot analysis. The Mito DNADX assay, which allows for the accurate real-time quantification of mtDNA damage in a 96-well platform, was performed in parallel. We confirmed that EB-42168 selectively inhibits LRRK2 phosphorylation on G2019S LRRK2 relative to wild-type LRRK2. On the other hand, MLi-2 was equipotent for wild-type and G2019S LRRK2. Acute treatment with EB-42168 inhibited LRRK2 phosphorylation and also restored mtDNA damage to healthy control levels. We further investigated the relationship between LRRK2 kinase activity, mtDNA damage and mitophagy. Levels of mtDNA damage caused by G2019S LRRK2 were fully re-established within 2 h of a LRRK2 inhibitor wash out and recovery experiment, indicating the mtDNA damage phenotype is highly dynamic. G2019S LRRK2 mitophagy defects were not alleviated with LRRK2 kinase inhibition, suggesting that mitophagy is not mechanistically regulating LRRK2 kinase-mediated reversal of mtDNA damage in this acute timeframe. Abrogation of mtDNA damage with the mutant selective tool inhibitor EB-42168 demonstrates the potential of a precision medicine approach for LRRK2 G2019S PD. Levels of mtDNA damage may serve as a potential pharmacodynamic biomarker of altered kinase activity that could be useful for small molecule development and clinical trials.
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Affiliation(s)
- Nicholas Pena
- Departments of Neurology and Pathology, Duke University School of Medicine, Durham, NC, 27710, USA
- Duke Center for Neurodegeneration and Neurotherapeutics, Duke University, Durham, NC, USA
| | - Tara Richbourg
- Departments of Neurology and Pathology, Duke University School of Medicine, Durham, NC, 27710, USA
- Duke Center for Neurodegeneration and Neurotherapeutics, Duke University, Durham, NC, USA
| | - Claudia P Gonzalez-Hunt
- Departments of Neurology and Pathology, Duke University School of Medicine, Durham, NC, 27710, USA
- Duke Center for Neurodegeneration and Neurotherapeutics, Duke University, Durham, NC, USA
| | - Rui Qi
- Departments of Neurology and Pathology, Duke University School of Medicine, Durham, NC, 27710, USA
- Duke Center for Neurodegeneration and Neurotherapeutics, Duke University, Durham, NC, USA
| | - Paul Wren
- ESCAPE Bio, Inc., South San Francisco, CA, 94080, USA
| | | | | | | | - Laurie H Sanders
- Departments of Neurology and Pathology, Duke University School of Medicine, Durham, NC, 27710, USA.
- Duke Center for Neurodegeneration and Neurotherapeutics, Duke University, Durham, NC, USA.
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Luo S, Wang D, Zhang Z. Post-translational modification and mitochondrial function in Parkinson's disease. Front Mol Neurosci 2024; 16:1329554. [PMID: 38273938 PMCID: PMC10808367 DOI: 10.3389/fnmol.2023.1329554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 12/21/2023] [Indexed: 01/27/2024] Open
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disease with currently no cure. Most PD cases are sporadic, and about 5-10% of PD cases present a monogenic inheritance pattern. Mutations in more than 20 genes are associated with genetic forms of PD. Mitochondrial dysfunction is considered a prominent player in PD pathogenesis. Post-translational modifications (PTMs) allow rapid switching of protein functions and therefore impact various cellular functions including those related to mitochondria. Among the PD-associated genes, Parkin, PINK1, and LRRK2 encode enzymes that directly involved in catalyzing PTM modifications of target proteins, while others like α-synuclein, FBXO7, HTRA2, VPS35, CHCHD2, and DJ-1, undergo substantial PTM modification, subsequently altering mitochondrial functions. Here, we summarize recent findings on major PTMs associated with PD-related proteins, as enzymes or substrates, that are shown to regulate important mitochondrial functions and discuss their involvement in PD pathogenesis. We will further highlight the significance of PTM-regulated mitochondrial functions in understanding PD etiology. Furthermore, we emphasize the potential for developing important biomarkers for PD through extensive research into PTMs.
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Affiliation(s)
- Shishi Luo
- Institute for Future Sciences, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- Key Laboratory of Rare Pediatric Diseases, Ministry of Education, Hengyang, Hunan, China
- The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, China
| | - Danling Wang
- Institute for Future Sciences, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- Key Laboratory of Rare Pediatric Diseases, Ministry of Education, Hengyang, Hunan, China
- The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, Hunan, China
| | - Zhuohua Zhang
- Institute for Future Sciences, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- Key Laboratory of Rare Pediatric Diseases, Ministry of Education, Hengyang, Hunan, China
- Institute of Molecular Precision Medicine, Xiangya Hospital, Key Laboratory of Molecular Precision Medicine of Hunan Province and Center for Medical Genetics, Hunan Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan, China
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Iannotta L, Emanuele M, Favetta G, Tombesi G, Vandewynckel L, Lara Ordóñez AJ, Saliou JM, Drouyer M, Sibran W, Civiero L, Nichols RJ, Athanasopoulos PS, Kortholt A, Chartier-Harlin MC, Greggio E, Taymans JM. PAK6-mediated phosphorylation of PPP2R2C regulates LRRK2-PP2A complex formation. Front Mol Neurosci 2023; 16:1269387. [PMID: 38169846 PMCID: PMC10759229 DOI: 10.3389/fnmol.2023.1269387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 11/20/2023] [Indexed: 01/05/2024] Open
Abstract
Mutations in leucine-rich repeat kinase 2 (LRRK2) are a common cause of inherited and sporadic Parkinson's disease (PD) and previous work suggests that dephosphorylation of LRRK2 at a cluster of heterologous phosphosites is associated to disease. We have previously reported subunits of the PP1 and PP2A classes of phosphatases as well as the PAK6 kinase as regulators of LRRK2 dephosphorylation. We therefore hypothesized that PAK6 may have a functional link with LRRK2's phosphatases. To investigate this, we used PhosTag gel electrophoresis with purified proteins and found that PAK6 phosphorylates the PP2A regulatory subunit PPP2R2C at position S381. While S381 phosphorylation did not affect PP2A holoenzyme formation, a S381A phosphodead PPP2R2C showed impaired binding to LRRK2. Also, PAK6 kinase activity changed PPP2R2C subcellular localization in a S381 phosphorylation-dependent manner. Finally, PAK6-mediated dephosphorylation of LRRK2 was unaffected by phosphorylation of PPP2R2C at S381, suggesting that the previously reported mechanism whereby PAK6-mediated phosphorylation of 14-3-3 proteins promotes 14-3-3-LRRK2 complex dissociation and consequent exposure of LRRK2 phosphosites for dephosphorylation is dominant. Taken together, we conclude that PAK6-mediated phosphorylation of PPP2R2C influences the recruitment of PPP2R2C to the LRRK2 complex and PPP2R2C subcellular localization, pointing to an additional mechanism in the fine-tuning of LRRK2 phosphorylation.
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Affiliation(s)
- Lucia Iannotta
- Department of Biology, University of Padova, Padua, Italy
- National Research Council, c/o Humanitas Research Hospital, Institute of Neuroscience, Rozzano, Italy
| | - Marco Emanuele
- Univ. Lille, Inserm, CHU Lille, UMR-S 1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | - Giulia Favetta
- Department of Biology, University of Padova, Padua, Italy
| | - Giulia Tombesi
- Department of Biology, University of Padova, Padua, Italy
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Laurine Vandewynckel
- Univ. Lille, Inserm, CHU Lille, UMR-S 1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | | | - Jean-Michel Saliou
- University of Lille, CNRS, Inserm, CHU Lille, Institute Pasteur de Lille, US 41 – UAR 2014 – PLBS, Lille, France
| | - Matthieu Drouyer
- Univ. Lille, Inserm, CHU Lille, UMR-S 1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | - William Sibran
- Univ. Lille, Inserm, CHU Lille, UMR-S 1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
| | - Laura Civiero
- Department of Biology, University of Padova, Padua, Italy
- IRCSS, San Camillo Hospital, Venice, Italy
| | - R. Jeremy Nichols
- Department of Pathology, Stanford University, Stanford, CA, United States
| | | | - Arjan Kortholt
- Department of Cell Biochemistry, University of Groningen, Groningen, Netherlands
- YETEM-Innovative Technologies Application and Research Centre, Suleyman Demirel University West Campus, Isparta, Turkey
| | | | - Elisa Greggio
- Department of Biology, University of Padova, Padua, Italy
- Centro Studi per la Neurodegenerazione (CESNE), University of Padova, Padua, Italy
| | - Jean-Marc Taymans
- Univ. Lille, Inserm, CHU Lille, UMR-S 1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
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Mazaki Y, Handa H, Fumoto Y, Horinouchi T, Onodera Y. LRRK2 is involved in the chemotaxis of neutrophils and differentiated HL-60 cells, and the inhibition of LRRK2 kinase activity increases fMLP-induced chemotactic activity. Cell Commun Signal 2023; 21:300. [PMID: 37904222 PMCID: PMC10614378 DOI: 10.1186/s12964-023-01305-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Accepted: 09/04/2023] [Indexed: 11/01/2023] Open
Abstract
BACKGROUND Neutrophils depend heavily on glycolysis for energy production under normal conditions. In contrast, neutrophils require energy supplied by mitochondrial oxidative phosphorylation (OXPHOS) during chemotaxis. However, the mechanism by which the energy supply changes from glycolysis to OXPHOS remains unknown. Leucine-rich repeat kinase 2 (LRRK2) is partially present in the outer mitochondrial membrane fraction. Lrrk2-deficient cells show mitochondrial fragmentation and reduced OXPHOS activity. We have previously reported that mitofusin (MFN) 2 is involved in chemotaxis and OXPHOS activation upon chemoattractant N-formyl-Met-Leu-Phe (fMLP) stimulation in differentiated HL-60 (dHL-60) cells. It has been previously reported that LRRK2 binds to MFN2 and partially colocalizes with MFN2 at the mitochondrial membranes. This study investigated the involvement of LRRK2 in chemotaxis and MFN2 activation in neutrophils and dHL-60 cells. METHODS Lrrk2 knockout neutrophils and Lrrk2 knockdown dHL-60 cells were used to examine the possible involvement of LRRK2 in chemotaxis. Lrrk2 knockdown dHL-60 cells were used a tetracycline-inducible small hairpin RNA (shRNA) system to minimize the effects of LRRK2 knockdown during cell culture. The relationship between LRRK2 and MFN2 was investigated by measuring the GTP-binding activity of MFN2 in Lrrk2 knockdown dHL-60 cells. The effects of LRRK2 kinase activity on chemotaxis were examined using the LRRK2 kinase inhibitor MLi-2. RESULTS fMLP-induced chemotactic activity was reduced in Lrrk2 knockout neutrophils in vitro and in vivo. Lrrk2 knockdown in dHL-60 cells expressing Lrrk2 shRNA also reduced fMLP-induced chemotactic activity. Lrrk2 knockdown dHL-60 cells showed reduced OXPHOS activity and suppressed mitochondrial morphological change, similar to Mfn2 knockdown dHL-60 cells. The amount of LRRK2 in the mitochondrial fraction and the GTP-binding activity of MFN2 increased upon fMLP stimulation, and the MFN2 GTP-binding activity was suppressed in Lrrk2 knockdown dHL-60 cells. Furthermore, the kinase activity of LRRK2 and Ser935 phosphorylation of LRRK2 were reduced upon fMLP stimulation, and LRRK2 kinase inhibition by MLi-2 increased the migration to fMLP. CONCLUSIONS LRRK2 is involved in neutrophil chemotaxis and the GTP-binding activity of MFN2 upon fMLP stimulation. On the other hand, the kinase activity of LRRK2 shows a negative regulatory effect on fMLP-induced chemotactic activity in dHL-60 cells. Video Abstract.
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Affiliation(s)
- Yuichi Mazaki
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
| | - Haruka Handa
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yoshizuki Fumoto
- Department of Molecular Biology, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takahiro Horinouchi
- Department of Cellular Pharmacology, Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yasuhito Onodera
- Global Center for Biomedical Science and Engineering (GCB), Faculty of Medicine, Hokkaido University, Sapporo, Japan
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Zhu C, Herbst S, Lewis PA. Leucine-rich repeat kinase 2 at a glance. J Cell Sci 2023; 136:jcs259724. [PMID: 37698513 PMCID: PMC10508695 DOI: 10.1242/jcs.259724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023] Open
Abstract
Leucine-rich repeat kinase 2 (LRRK2) is a multidomain scaffolding protein with dual guanosine triphosphatase (GTPase) and kinase enzymatic activities, providing this protein with the capacity to regulate a multitude of signalling pathways and act as a key mediator of diverse cellular processes. Much of the interest in LRRK2 derives from mutations in the LRRK2 gene being the most common genetic cause of Parkinson's disease, and from the association of the LRRK2 locus with a number of other human diseases, including inflammatory bowel disease. Therefore, the LRRK2 research field has focused on the link between LRRK2 and pathology, with the aim of uncovering the underlying mechanisms and, ultimately, finding novel therapies and treatments to combat them. From the biochemical and cellular functions of LRRK2, to its relevance to distinct disease mechanisms, this Cell Science at a Glance article and the accompanying poster deliver a snapshot of our current understanding of LRRK2 function, dysfunction and links to disease.
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Affiliation(s)
- Christiane Zhu
- Department of Comparative Biomedical Sciences, Royal Veterinary College, University of London, London NW1 0TU, UK
- Department of Neurodegenerative diseases, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Susanne Herbst
- Department of Comparative Biomedical Sciences, Royal Veterinary College, University of London, London NW1 0TU, UK
- Department of Neurodegenerative diseases, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
| | - Patrick A. Lewis
- Department of Comparative Biomedical Sciences, Royal Veterinary College, University of London, London NW1 0TU, UK
- Department of Neurodegenerative diseases, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
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Ito G, Utsunomiya-Tate N. Overview of the Impact of Pathogenic LRRK2 Mutations in Parkinson's Disease. Biomolecules 2023; 13:biom13050845. [PMID: 37238714 DOI: 10.3390/biom13050845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/25/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023] Open
Abstract
Leucine-rich repeat kinase 2 (LRRK2) is a large protein kinase that physiologically phosphorylates and regulates the function of several Rab proteins. LRRK2 is genetically implicated in the pathogenesis of both familial and sporadic Parkinson's disease (PD), although the underlying mechanism is not well understood. Several pathogenic mutations in the LRRK2 gene have been identified, and in most cases the clinical symptoms that PD patients with LRRK2 mutations develop are indistinguishable from those of typical PD. However, it has been shown that the pathological manifestations in the brains of PD patients with LRRK2 mutations are remarkably variable when compared to sporadic PD, ranging from typical PD pathology with Lewy bodies to nigral degeneration with deposition of other amyloidogenic proteins. The pathogenic mutations in LRRK2 are also known to affect the functions and structure of LRRK2, the differences in which may be partly attributable to the variations observed in patient pathology. In this review, in order to help researchers unfamiliar with the field to understand the mechanism of pathogenesis of LRRK2-associated PD, we summarize the clinical and pathological manifestations caused by pathogenic mutations in LRRK2, their impact on the molecular function and structure of LRRK2, and their historical background.
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Affiliation(s)
- Genta Ito
- Department of Biomolecular Chemistry, Faculty of Pharma-Sciences, Teikyo University, Tokyo 173-8605, Japan
| | - Naoko Utsunomiya-Tate
- Department of Biomolecular Chemistry, Faculty of Pharma-Sciences, Teikyo University, Tokyo 173-8605, Japan
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Tang X, Xing S, Ma M, Xu Z, Guan Q, Chen Y, Feng F, Liu W, Chen T, Chen Y, Sun H. The Development and Design Strategy of Leucine-Rich Repeat Kinase 2 Inhibitors: Promising Therapeutic Agents for Parkinson's Disease. J Med Chem 2023; 66:2282-2307. [PMID: 36758171 DOI: 10.1021/acs.jmedchem.2c01552] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disorder affecting millions of people worldwide. Mutations in the gene encoding leucine-rich repeat kinase 2 (LRRK2) are the most common genetic risk factor for PD. Elevated LRRK2 kinase activity is found in idiopathic and familial PD cases. LRRK2 mutations are involved in multiple PD pathogeneses, including dysregulation of mitochondrial homeostasis, ciliogenesis, etc. Here, we provide a comprehensive overview of the biological function, structure, and mutations of LRRK2. We also examine recent advances and challenges in developing LRRK2 inhibitors and address prospective protein-based targeting strategies. The binding mechanisms, structure-activity relationships, and pharmacokinetic features of inhibitors are emphasized to provide a comprehensive compendium on the rational design of LRRK2 inhibitors. We hope that this publication can serve as a guide for designing novel LRRK2 inhibitors based on the summarized facts and perspectives.
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Affiliation(s)
- Xu Tang
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Shuaishuai Xing
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Mingkang Ma
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Ziwei Xu
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Qianwen Guan
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Yuting Chen
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Feng Feng
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 211198, People's Republic of China
- Jiangsu Food and Pharmaceuticals Science College, Institute of Food and Pharmaceuticals Research, Huai'an 223005, People's Republic of China
| | - Wenyuan Liu
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Tingkai Chen
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
| | - Yao Chen
- School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
| | - Haopeng Sun
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, People's Republic of China
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The Roc domain of LRRK2 as a hub for protein-protein interactions: a focus on PAK6 and its impact on RAB phosphorylation. Brain Res 2022; 1778:147781. [DOI: 10.1016/j.brainres.2022.147781] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 12/21/2021] [Accepted: 01/04/2022] [Indexed: 12/17/2022]
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10
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LRRK2 signaling in neurodegeneration: two decades of progress. Essays Biochem 2021; 65:859-872. [PMID: 34897411 DOI: 10.1042/ebc20210013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/13/2021] [Accepted: 11/23/2021] [Indexed: 12/17/2022]
Abstract
Leucine-rich repeat kinase 2 (LRRK2) is a complex GTPase/kinase orchestrating cytoskeletal dynamics and multiple steps of the endolysosomal pathway through interaction with a host of partners and phosphorylation of a subset of Rab GTPases. Mutations in LRRK2 cause late-onset Parkinson's disease (PD) and common variants in the locus containing LRRK2 have been associated with sporadic PD, progressive supranuclear palsy as well as a number of inflammatory diseases. This review encompasses the major discoveries in the field of LRRK2 pathobiology, from the initial gene cloning to the latest progress in LRRK2 inhibition as a promising therapeutic approach to fight neurodegeneration.
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Tasegian A, Singh F, Ganley IG, Reith AD, Alessi DR. Impact of Type II LRRK2 inhibitors on signaling and mitophagy. Biochem J 2021; 478:3555-3573. [PMID: 34515301 PMCID: PMC8589421 DOI: 10.1042/bcj20210375] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 01/21/2023]
Abstract
Much effort has been devoted to the development of selective inhibitors of the LRRK2 as a potential treatment for LRRK2 driven Parkinson's disease. In this study, we first compare the properties of Type I (GSK3357679A and MLi-2) and Type II (GZD-824, Rebastinib and Ponatinib) kinase inhibitors that bind to the closed or open conformations of the LRRK2 kinase domain, respectively. We show that Type I and Type II inhibitors suppress phosphorylation of Rab10 and Rab12, key physiological substrates of LRRK2 and also promote mitophagy, a process suppressed by LRRK2. Type II inhibitors also display higher potency towards wild-type LRRK2 compared with pathogenic mutants. Unexpectedly, we find that Type II inhibitors, in contrast with Type I compounds, fail to induce dephosphorylation of a set of well-studied LRRK2 biomarker phosphorylation sites at the N-terminal region of LRRK2, including Ser935. These findings emphasize that the biomarker phosphorylation sites on LRRK2 are likely reporting on the open vs closed conformation of LRRK2 kinase and that only inhibitors which stabilize the closed conformation induce dephosphorylation of these biomarker sites. Finally, we demonstrate that the LRRK2[A2016T] mutant which is resistant to MLi-2 Type 1 inhibitor, also induces resistance to GZD-824 and Rebastinib suggesting this mutation could be exploited to distinguish off target effects of Type II inhibitors. Our observations provide a framework of knowledge to aid with the development of more selective Type II LRRK2 inhibitors.
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Affiliation(s)
- Anna Tasegian
- Medical Research Council (MRC) Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, U.K
| | - Francois Singh
- Medical Research Council (MRC) Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, U.K
| | - Ian G. Ganley
- Medical Research Council (MRC) Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, U.K
| | - Alastair D. Reith
- GlaxoSmithKline Pharmaceuticals R&D, Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, U.K
| | - Dario R. Alessi
- Medical Research Council (MRC) Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, U.K
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Nazish I, Arber C, Piers TM, Warner TT, Hardy JA, Lewis PA, Pocock JM, Bandopadhyay R. Abrogation of LRRK2 dependent Rab10 phosphorylation with TLR4 activation and alterations in evoked cytokine release in immune cells. Neurochem Int 2021; 147:105070. [PMID: 34004238 PMCID: PMC7610942 DOI: 10.1016/j.neuint.2021.105070] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 05/11/2021] [Indexed: 02/08/2023]
Abstract
LRRK2 protein is expressed prominently in immune cells, cell types whose contribution to LRRK2-associated genetic Parkinson's disease (PD) is increasingly being recognised. We investigated the effect of inflammatory stimuli using RAW264.7 murine macrophage cells as model systems. A detailed time course of TLR2 and TLR4 stimulation was investigated through measuring LRRK2 phosphorylation at its specific phospho-sites, and Rab8 and Rab10 phosphorylation together with cytokine release following treatment with LPS and zymosan. LRRK2 phosphorylation at Ser935, Ser955 and Ser973 was increased significantly over untreated conditions at 4-24h in both WT-LRRK2 and T1348N-LRRK2 cell lines to similar extents although levels of Ser910 phosphorylation were maintained at higher levels throughout. Importantly we demonstrate that LPS stimulation significantly decreased phospho-Rab10 but not phospho-Rab8 levels over 4-24h in both WT-LRRK2 and T1348N-LRRK2 cell lines. The dephosphorylation of Rab10 was not attributed to its specific phosphatase, PPM1H as the levels remained unaltered with LPS treatment. MAPK phosphorylation occurred prior to LRRK2 phosphorylation which was validated by blocking TLR4 and TLR2 receptors with TAK242 or Sparstolonin B respectively. A significant decrease in basal level of TNFα release was noted in both T1348N-LRRK2 and KO-LRRK2 cell lines at 48h compared to WT-LRRK2 cell line, however LPS and zymosan treatment did not cause any significant alteration in the TNFα and IL-6 release between the three cell lines. In contrast, LPS and zymosan caused significantly lower IL-10 release in T1348N-LRRK2 and KO-LRRK2 cell lines. A significant decrease in phospho-Rab10 levels was also confirmed in human IPS-derived macrophages with TLR4 activation. Our data demonstrates for the first time that LRRK2-dependent Rab10 phosphorylation is modulated by LPS stimulation, and that cytokine release may be influenced by the status of LRRK2. These data provide further insights into the function of LRRK2 in immune response, and has relevance for understanding cellular dysfunctions when developing LRRK2-based inhibitors for clinical treatment.
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Affiliation(s)
- Iqra Nazish
- Reta Lila Weston Institute and Department of Clinical and Movement Neuroscience, UCL Queen Square Institute of Neurology, 1 Wakefield Street, WC1N 1PJ, UK
| | - Charles Arber
- Department of Neurodegenerative Diseases, UCL Queen Square Institute of Neurology, 1 Wakefield Street, WC1N 1PJ, UK
| | - Thomas M. Piers
- Department of Neuroinflammation, UCL Queen Square Institute of Neurology, 1 Wakefield Street, WC1N 1PJ, UK
| | - Thomas T. Warner
- Reta Lila Weston Institute and Department of Clinical and Movement Neuroscience, UCL Queen Square Institute of Neurology, 1 Wakefield Street, WC1N 1PJ, UK
| | - John A. Hardy
- Reta Lila Weston Institute and Department of Clinical and Movement Neuroscience, UCL Queen Square Institute of Neurology, 1 Wakefield Street, WC1N 1PJ, UK,Department of Neurodegenerative Diseases, UCL Queen Square Institute of Neurology, 1 Wakefield Street, WC1N 1PJ, UK,Queen Square Genomics, UCL Dementia Research Institute, Wing 1.2 Cruciform Building, Gower Street, London, WC1E 6BT, UK
| | - Patrick A. Lewis
- Department of Neurodegenerative Diseases, UCL Queen Square Institute of Neurology, 1 Wakefield Street, WC1N 1PJ, UK,Royal Veterinary College, Royal College Street, London, NW1 0TU, UK
| | - Jennifer M. Pocock
- Department of Neuroinflammation, UCL Queen Square Institute of Neurology, 1 Wakefield Street, WC1N 1PJ, UK
| | - Rina Bandopadhyay
- Reta Lila Weston Institute and Department of Clinical and Movement Neuroscience, UCL Queen Square Institute of Neurology, 1 Wakefield Street, WC1N 1PJ, UK.
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13
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Protein phosphatase 2A holoenzymes regulate leucine-rich repeat kinase 2 phosphorylation and accumulation. Neurobiol Dis 2021; 157:105426. [PMID: 34144124 DOI: 10.1016/j.nbd.2021.105426] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 11/22/2022] Open
Abstract
LRRK2 is a highly phosphorylated multidomain protein and mutations in the gene encoding LRRK2 are a major genetic determinant of Parkinson's disease (PD). Dephosphorylation at LRRK2's S910/S935/S955/S973 phosphosite cluster is observed in several conditions including in sporadic PD brain, in several disease mutant forms of LRRK2 and after pharmacological LRRK2 kinase inhibition. However, the mechanism of LRRK2 dephosphorylation is poorly understood. We performed a phosphatome-wide reverse genetics screen to identify phosphatases involved in the dephosphorylation of the LRRK2 phosphosite S935. Candidate phosphatases selected from the primary screen were tested in mammalian cells, Xenopus oocytes and in vitro. Effects of PP2A on endogenous LRRK2 phosphorylation were examined via expression modulation with CRISPR/dCas9. Our screening revealed LRRK2 phosphorylation regulators linked to the PP1 and PP2A holoenzyme complexes as well as CDC25 phosphatases. We showed that dephosphorylation induced by different kinase inhibitor triggered relocalisation of phosphatases PP1 and PP2A in LRRK2 subcellular compartments in HEK-293 T cells. We also demonstrated that LRRK2 is an authentic substrate of PP2A both in vitro and in Xenopus oocytes. We singled out the PP2A holoenzyme PPP2CA:PPP2R2 as a powerful phosphoregulator of pS935-LRRK2. Furthermore, we demonstrated that this specific PP2A holoenzyme induces LRRK2 relocalization and triggers LRRK2 ubiquitination, suggesting its involvement in LRRK2 clearance. The identification of the PPP2CA:PPP2R2 complex regulating LRRK2 S910/S935/S955/S973 phosphorylation paves the way for studies refining PD therapeutic strategies that impact LRRK2 phosphorylation.
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14
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Goveas L, Mutez E, Chartier-Harlin MC, Taymans JM. Mind the Gap: LRRK2 Phenotypes in the Clinic vs. in Patient Cells. Cells 2021; 10:981. [PMID: 33922322 PMCID: PMC8145309 DOI: 10.3390/cells10050981] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/15/2021] [Accepted: 04/16/2021] [Indexed: 12/14/2022] Open
Abstract
Mutations in the Parkinson's disease (PD) protein Leucine Rich Repeat Kinase 2 (LRRK2) have been under study for more than 15 years and our understanding of the cellular phenotypes for the pathogenic mutant forms of LRRK2 has significantly advanced. In parallel to research on LRRK2 mutations in experimental systems, clinical characterization of patients carrying LRRK2 mutations has advanced, as has the analysis of cells that are derived from these patients, including fibroblasts, blood-derived cells, or cells rendered pluripotent. Under the hypothesis that patient clinical phenotypes are a consequence of a cascade of underlying molecular mechanisms gone astray, we currently have a unique opportunity to compare findings from patients and patient-derived cells to ask the question of whether the clinical phenotype of LRRK2 Parkinson's disease and cellular phenotypes of LRRK2 patient-derived cells may be mutually informative. In this review, we aim to summarize the available information on phenotypes of LRRK2 mutations in the clinic, in patient-derived cells, and in experimental models in order to better understand the relationship between the three at the molecular and cellular levels and identify trends and gaps in correlating the data.
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Affiliation(s)
- Liesel Goveas
- UMR-S 1172—LilNCog—Lille Neuroscience & Cognition, Université de Lille, Inserm, CHU Lille, F-59000 Lille, France; (L.G.); (E.M.)
| | - Eugénie Mutez
- UMR-S 1172—LilNCog—Lille Neuroscience & Cognition, Université de Lille, Inserm, CHU Lille, F-59000 Lille, France; (L.G.); (E.M.)
- Neurology and Movement Disorders Department, CHU Lille University Hospital, F-59000 Lille, France
| | - Marie-Christine Chartier-Harlin
- UMR-S 1172—LilNCog—Lille Neuroscience & Cognition, Université de Lille, Inserm, CHU Lille, F-59000 Lille, France; (L.G.); (E.M.)
| | - Jean-Marc Taymans
- UMR-S 1172—LilNCog—Lille Neuroscience & Cognition, Université de Lille, Inserm, CHU Lille, F-59000 Lille, France; (L.G.); (E.M.)
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15
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Pathogenic LRRK2 requires secondary factors to induce cellular toxicity. Biosci Rep 2021; 40:226517. [PMID: 32975566 PMCID: PMC7560525 DOI: 10.1042/bsr20202225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/08/2020] [Accepted: 09/24/2020] [Indexed: 12/02/2022] Open
Abstract
Pathogenic mutations in the leucine-rich repeat kinase 2 (LRRK2) gene belong to the most common genetic causes of inherited Parkinson’s disease (PD) and variations in its locus increase the risk to develop sporadic PD. Extensive research efforts aimed at understanding how changes in the LRRK2 function result in molecular alterations that ultimately lead to PD. Cellular LRRK2-based models revealed several potential pathophysiological mechanisms including apoptotic cell death, LRRK2 protein accumulation and deficits in neurite outgrowth. However, highly variable outcomes between different cellular models have been reported. Here, we have investigated the effect of different experimental conditions, such as the use of different tags and gene transfer methods, in various cellular LRRK2 models. Readouts included cell death, sensitivity to oxidative stress, LRRK2 relocalization, α-synuclein aggregation and neurite outgrowth in cell culture, as well as neurite maintenance in vivo. We show that overexpression levels and/or the tag fused to LRRK2 affect the relocalization of LRRK2 to filamentous and skein-like structures. We found that overexpression of LRRK2 per se is not sufficient to induce cellular toxicity or to affect α-synuclein-induced toxicity and aggregate formation. Finally, neurite outgrowth/retraction experiments in cell lines and in vivo revealed that secondary, yet unknown, factors are required for the pathogenic LRRK2 effects on neurite length. Our findings stress the importance of technical and biological factors in LRRK2-induced cellular phenotypes and hence imply that conclusions based on these types of LRRK2-based assays should be interpreted with caution.
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16
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Follett J, Farrer MJ. LRRK2; a dynamic regulator of cellular trafficking. Brain Res 2021; 1761:147394. [PMID: 33662339 DOI: 10.1016/j.brainres.2021.147394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 01/11/2021] [Accepted: 02/20/2021] [Indexed: 12/26/2022]
Abstract
Parkinson's disease (PD) represents the second most common neurodegenerative disorder, characterized clinically by bradykinesia, resting tremor, rigidity and postural instability, and a variety of non-motor features. The etiology of PD is unknown, however genetic, environmental and inflammatory factors may influence disease onset and progression. Genetic variability in leucine-rich repeat kinase 2 confers significant genotypic and population-attributable risk for LRRK2-parkinsonism that is clinically indistinguishable from idiopathic PD. Nevertheless, the age-associated midbrain pathology observed post-mortem in LRRK2-parkinsonism may involve the abnormal accumulation of either α-synuclein or tau, or just the loss of dopaminergic neurons and gliosis. While diverse biological functions have been described for this multi-domain protein in many cell types, evidence suggests LRRK2 may sense endosomal trafficking to orchestrate dynamic changes in vesicular flux and cytoskeletal architecture. This review posits the long-held belief that synaptic-axonal dysfunction and terminal degeneration may precede dopaminergic cell loss, and provocatively questions how facets of LRRK2 biology may influence this molecular pathogenesis.
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Affiliation(s)
- Jordan Follett
- Laboratory of Neurogenetics and Neuroscience, Department of Neurology, University of Florida, Gainesville, FL, USA.
| | - Matthew J Farrer
- Laboratory of Neurogenetics and Neuroscience, Department of Neurology, University of Florida, Gainesville, FL, USA
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17
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Pischedda F, Piccoli G. LRRK2 at the pre-synaptic site: A 16-years perspective. J Neurochem 2021; 157:297-311. [PMID: 33206398 DOI: 10.1111/jnc.15240] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 11/04/2020] [Accepted: 11/09/2020] [Indexed: 12/13/2022]
Abstract
Parkinson's disease is a common neurodegenerative disorder and is clinically characterized by bradykinesia, rigidity, and resting tremor. Missense mutations in the leucine-rich repeat protein kinase-2 gene (LRRK2) are a recognized cause of inherited Parkinson's disease. The physiological and pathological impact of LRRK2 is still obscure, but accumulating evidence indicates that LRRK2 orchestrates diverse aspects of membrane trafficking, such as membrane fusion and vesicle formation and transport along actin and tubulin tracks. In the present review, we focus on the special relation between LRRK2 and synaptic vesicles. LRRK2 binds and phosphorylates key actors within the synaptic vesicle cycle. Accordingly, alterations in dopamine and glutamate transmission have been described upon LRRK2 manipulations. However, the different modeling strategies and phenotypes observed require a critical approach to decipher the outcome of LRRK2 at the pre-synaptic site.
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Affiliation(s)
- Francesca Pischedda
- CIBIO, Università degli Studi di Trento, Italy & Dulbecco Telethon Institute, Trento, Italy
| | - Giovanni Piccoli
- CIBIO, Università degli Studi di Trento, Italy & Dulbecco Telethon Institute, Trento, Italy
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18
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Harney J, Bajaj P, Finley JE, Kopec AK, Koza-Taylor PH, Boucher GG, Lanz TA, Doshna CM, Somps CJ, Adkins K, Houle C. An in vitro alveolar epithelial cell model recapitulates LRRK2 inhibitor-induced increases in lamellar body size observed in preclinical models. Toxicol In Vitro 2021; 70:105012. [DOI: 10.1016/j.tiv.2020.105012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 09/14/2020] [Accepted: 10/05/2020] [Indexed: 01/28/2023]
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19
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Divergent Effects of G2019S and R1441C LRRK2 Mutations on LRRK2 and Rab10 Phosphorylations in Mouse Tissues. Cells 2020; 9:cells9112344. [PMID: 33105882 PMCID: PMC7690595 DOI: 10.3390/cells9112344] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/16/2020] [Accepted: 10/20/2020] [Indexed: 12/20/2022] Open
Abstract
Mutations in LRRK2 cause familial Parkinson’s disease and common variants increase disease risk. LRRK2 kinase activity and cellular localization are tightly regulated by phosphorylation of key residues, primarily Ser1292 and Ser935, which impacts downstream phosphorylation of its substrates, among which Rab10. A comprehensive characterization of LRRK2 activity and phosphorylation in brain as a function of age and mutations is missing. Here, we monitored Ser935 and Ser1292 phosphorylation in midbrain, striatum, and cortex of 1, 6, and 12 months-old mice carrying G2019S and R1441C mutations or murine bacterial artificial chromosome (BAC)-Lrrk2-G2019S. We observed that G2019S and, at a greater extent, R1441C brains display decreased phospho-Ser935, while Ser1292 autophosphorylation increased in G2019S but not in R1441C brain, lung, and kidney compared to wild-type. Further, Rab10 phosphorylation, is elevated in R1441C carrying mice, indicating that the effect of LRRK2 mutations on substrate phosphorylation is not generalizable. In BAC-Lrrk2-G2019S striatum and midbrain, Rab10 phosphorylation, but not Ser1292 autophosphorylation, decreases at 12-months, pointing to autophosphorylation and substrate phosphorylation as uncoupled events. Taken together, our study provides novel evidence that LRRK2 phosphorylation in mouse brain is differentially impacted by mutations, brain area, and age, with important implications as diagnostic markers of disease progression and stratification.
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20
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Choi SY, Lee JH, Chung AY, Jo Y, Shin JH, Park HC, Kim H, Lopez-Gonzalez R, Ryu JR, Sun W. Prevention of mitochondrial impairment by inhibition of protein phosphatase 1 activity in amyotrophic lateral sclerosis. Cell Death Dis 2020; 11:888. [PMID: 33087694 PMCID: PMC7578657 DOI: 10.1038/s41419-020-03102-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 10/05/2020] [Accepted: 10/06/2020] [Indexed: 12/11/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease caused by progressive loss of motor neurons (MNs) and subsequent muscle weakness. These pathological features are associated with numerous cellular changes, including alteration in mitochondrial morphology and function. However, the molecular mechanisms associating mitochondrial structure with ALS pathology are poorly understood. In this study, we found that Dynamin-related protein 1 (Drp1) was dephosphorylated in several ALS models, including those with SOD1 and TDP-43 mutations, and the dephosphorylation was mediated by the pathological induction of protein phosphatase 1 (PP1) activity in these models. Suppression of the PP1-Drp1 cascade effectively prevented ALS-related symptoms, including mitochondrial fragmentation, mitochondrial complex I impairment, axonal degeneration, and cell death, in primary neuronal culture models, iPSC-derived human MNs, and zebrafish models in vivo. These results suggest that modulation of PP1-Drp1 activity may be a therapeutic target for multiple pathological features of ALS.
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Affiliation(s)
- So Yoen Choi
- Department of Anatomy, Korea University College of Medicine, Brain Korea 21 plus, Seoul, 02841, Republic of Korea
- Department of Neurology, University of Massachusetts Medical school, Worcester, MA, USA
| | - Ju-Hyun Lee
- Department of Anatomy, Korea University College of Medicine, Brain Korea 21 plus, Seoul, 02841, Republic of Korea
| | - Ah-Young Chung
- Graduate School of Medicine, Korea University, Ansan, Gyeonggido, Republic of Korea
| | - Youhwa Jo
- Department of Anatomy, Korea University College of Medicine, Brain Korea 21 plus, Seoul, 02841, Republic of Korea
| | - Joo-Ho Shin
- Division of Pharmacology, Department of Molecular Cell Biology, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon, Gyeonggi-do, 440-746, Republic of Korea
| | - Hae-Chul Park
- Graduate School of Medicine, Korea University, Ansan, Gyeonggido, Republic of Korea
| | - Hyun Kim
- Department of Anatomy, Korea University College of Medicine, Brain Korea 21 plus, Seoul, 02841, Republic of Korea
| | | | - Jae Ryun Ryu
- Department of Anatomy, Korea University College of Medicine, Brain Korea 21 plus, Seoul, 02841, Republic of Korea
| | - Woong Sun
- Department of Anatomy, Korea University College of Medicine, Brain Korea 21 plus, Seoul, 02841, Republic of Korea.
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21
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Gonzalez-Hunt CP, Thacker EA, Toste CM, Boularand S, Deprets S, Dubois L, Sanders LH. Mitochondrial DNA damage as a potential biomarker of LRRK2 kinase activity in LRRK2 Parkinson's disease. Sci Rep 2020; 10:17293. [PMID: 33057100 PMCID: PMC7557909 DOI: 10.1038/s41598-020-74195-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Accepted: 09/14/2020] [Indexed: 12/14/2022] Open
Abstract
Leucine-rich repeat kinase 2 (LRRK2) is a promising therapeutic target for the treatment of Parkinson's disease (PD) and LRRK2 kinase inhibitors are currently being tested in early phase clinical trials. In order to ensure the highest chance of success, a biomarker-guided entry into clinical trials is key. LRRK2 phosphorylation, and phosphorylation of the LRRK2 substrate Rab10, have been proposed as target engagement biomarkers for LRRK2 kinase inhibition. However, a pharmacodynamic biomarker to demonstrate that a biological response has occurred is lacking. We previously discovered that the LRRK2 G2019S mutation causes mitochondrial DNA (mtDNA) damage and is LRRK2 kinase activity-dependent. Here, we have explored the possibility that measurement of mtDNA damage is a "surrogate" for LRRK2 kinase activity and consequently of kinase inhibitor activity. Mitochondrial DNA damage was robustly increased in PD patient-derived immune cells with LRRK2 G2019S mutations as compared with controls. Following treatment with multiple classes of LRRK2 kinase inhibitors, a full reversal of mtDNA damage to healthy control levels was observed and correlated with measures of LRRK2 dephosphorylation. Taken together, assessment of mtDNA damage levels may be a sensitive measure of altered kinase activity and provide an extended profile of LRRK2 kinase modulation in clinical studies.
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Affiliation(s)
- C P Gonzalez-Hunt
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA
| | - E A Thacker
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA
| | - C M Toste
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA
| | - S Boularand
- Rare & Neurologic Diseases Research, Sanofi, Chilly Mazarin, France
| | - S Deprets
- Rare & Neurologic Diseases Research, Sanofi, Chilly Mazarin, France
| | - L Dubois
- Rare & Neurologic Diseases Research, Sanofi, Chilly Mazarin, France
| | - L H Sanders
- Department of Neurology, Duke University Medical Center, Durham, NC, 27710, USA.
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22
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Rideout HJ, Chartier-Harlin MC, Fell MJ, Hirst WD, Huntwork-Rodriguez S, Leyns CEG, Mabrouk OS, Taymans JM. The Current State-of-the Art of LRRK2-Based Biomarker Assay Development in Parkinson's Disease. Front Neurosci 2020; 14:865. [PMID: 33013290 PMCID: PMC7461933 DOI: 10.3389/fnins.2020.00865] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 07/24/2020] [Indexed: 12/22/2022] Open
Abstract
Evidence is mounting that LRRK2 function, particularly its kinase activity, is elevated in multiple forms of Parkinson's disease, both idiopathic as well as familial forms linked to mutations in the LRRK2 gene. However, sensitive quantitative markers of LRRK2 activation in clinical samples remain at the early stages of development. There are several measures of LRRK2 activity that could potentially be used in longitudinal studies of disease progression, as inclusion/exclusion criteria for clinical trials, to predict response to therapy, or as markers of target engagement. Among these are levels of LRRK2, phosphorylation of LRRK2 itself, either by other kinases or via auto-phosphorylation, its in vitro kinase activity, or phosphorylation of downstream substrates. This is advantageous on many levels, in that multiple indices of elevated kinase activity clearly strengthen the rationale for targeting this kinase with novel therapeutic candidates, and provide alternate markers of activation in certain tissues or biofluids for which specific measures are not detectable. However, this can also complicate interpretation of findings from different studies using disparate measures. In this review we discuss the current state of LRRK2-focused biomarkers, the advantages and disadvantages of the current pallet of outcome measures, the gaps that need to be addressed, and the priorities that the field has defined.
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Affiliation(s)
- Hardy J. Rideout
- Division of Basic Neurosciences, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Marie-Christine Chartier-Harlin
- Univ. Lille, Inserm, CHU Lille, U1172 - Lille Neuroscience & Cognition, Lille, France
- Inserm, UMR-S 1172, Team “Brain Biology and Chemistry”, Lille, France
| | | | | | | | | | | | - Jean-Marc Taymans
- Univ. Lille, Inserm, CHU Lille, U1172 - Lille Neuroscience & Cognition, Lille, France
- Inserm, UMR-S 1172, Team “Brain Biology and Chemistry”, Lille, France
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23
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Identification of peptides interfering with the LRRK2/PP1 interaction. PLoS One 2020; 15:e0237110. [PMID: 32790695 PMCID: PMC7425875 DOI: 10.1371/journal.pone.0237110] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 07/20/2020] [Indexed: 01/17/2023] Open
Abstract
Serine/threonine phosphatases are responsible for modulating the activities of the protein kinases implicated in the development of several pathologies. Here we identified by a PEP-scan approach a peptide of LRRK2, a Parkinson's disease associated protein, interacting with the phosphatase PP1. In order to study its biological activity, the peptide was fused via its N-terminal to an optimized cell penetrating peptide. We synthesized from the original peptide five interfering peptides and identified two (Mut3DPT-LRRK2-Short and Mut3DPT-LRRK2-Long) able to disrupt the LRRK2/PP1 interaction by competition in anti-LRRK2 immunoprecipitates. Using FITC-labelled peptides, we confirmed their internalization into cell lines as well as into primary cells obtained from healthy or ill human donors. We confirmed by ELISA test the association of Mut3DPT-LRRK2-Long peptide to purified PP1 protein. The peptides Mut3DPT-LRRK2-5 to 8 with either N or C-terminal deletions were not able to disrupt the association LRRK2/PP1 nor to associate with purified PP1 protein. The interfering sequences blocking the PP1/LRRK2 interaction were also fused to a shuttle peptide able to cross the blood brain barrier and showed that the newly generated peptides BBB-LRRK2-Short and BBB-LRRK2-Long were highly resistant to protease degradation. Furthermore, they blocked PP1/LRRK2 interaction and they penetrated into cells. Hence, these newly generated peptides can be employed as new tools in the investigation of the role of the LRRK2/PP1 interaction in normal and pathological conditions.
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24
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Kelly K, West AB. Pharmacodynamic Biomarkers for Emerging LRRK2 Therapeutics. Front Neurosci 2020; 14:807. [PMID: 32903744 PMCID: PMC7438883 DOI: 10.3389/fnins.2020.00807] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 07/10/2020] [Indexed: 12/22/2022] Open
Abstract
Genetic studies have identified variants in the LRRK2 gene as important components of Parkinson's disease (PD) pathobiology. Biochemical and emergent biomarker studies have coalesced around LRRK2 hyperactivation in disease. Therapeutics that diminish LRRK2 activity, either with small molecule kinase inhibitors or anti-sense oligonucleotides, have recently advanced to the clinic. Historically, there have been few successes in the development of therapies that might slow or halt the progression of neurodegenerative diseases. Over the past few decades of biomedical research, retrospective analyses suggest the broad integration of informative biomarkers early in development tends to distinguish successful pipelines from those that fail early. Herein, we discuss the biomarker regulatory process, emerging LRRK2 biomarker candidates, assays, underlying biomarker biology, and clinical integration.
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Affiliation(s)
- Kaela Kelly
- Duke Center for Neurodegeneration Research, Departments of Pharmacology and Cancer Biology, Neurology, and Neurobiology, Duke University, Durham, NC, United States
| | - Andrew B West
- Duke Center for Neurodegeneration Research, Departments of Pharmacology and Cancer Biology, Neurology, and Neurobiology, Duke University, Durham, NC, United States
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25
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Centrosomal cohesion deficits as cellular biomarker in lymphoblastoid cell lines from LRRK2 Parkinson's disease patients. Biochem J 2020; 476:2797-2813. [PMID: 31527116 PMCID: PMC6792036 DOI: 10.1042/bcj20190315] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Revised: 09/02/2019] [Accepted: 09/12/2019] [Indexed: 12/18/2022]
Abstract
Leucine-rich repeat kinase 2 (LRRK2) is a promising therapeutic target for the treatment of Parkinson's disease (PD), and orally bioavailable, brain penetrant and highly potent LRRK2 kinase inhibitors are in early stages of clinical testing. Detection of LRRK2 phosphorylation, as well as phosphorylation of Rab10, a LRRK2 kinase substrate, have been proposed as target engagement biomarkers for LRRK2 inhibitor clinical trials. However, these readouts do not seem able to stratify patients based on enhanced LRRK2 kinase activity. Here, we describe a robust cell biological assay based on centrosomal cohesion alterations which were observed in peripheral blood mononuclear cell-derived lymphoblastoid cell lines (LCLs) from patients with G2019S LRRK2 mutations as compared with healthy controls, and could also be detected in a subset of sporadic PD patient samples. We suggest that LCLs may be a valuable resource for LRRK2 research, and that determination of centrosomal cohesion deficits may assist in the stratification of a subset of sporadic PD patients.
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Marchand A, Drouyer M, Sarchione A, Chartier-Harlin MC, Taymans JM. LRRK2 Phosphorylation, More Than an Epiphenomenon. Front Neurosci 2020; 14:527. [PMID: 32612495 PMCID: PMC7308437 DOI: 10.3389/fnins.2020.00527] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 04/28/2020] [Indexed: 12/12/2022] Open
Abstract
Mutations in the Leucine Rich Repeat Kinase 2 (LRRK2) gene are linked to autosomal dominant Parkinson's disease (PD), and genetic variations at the LRRK2 locus are associated with an increased risk for sporadic PD. This gene encodes a kinase that is physiologically multiphosphorylated, including clusters of both heterologous phosphorylation and autophosphorylation sites. Several pieces of evidence indicate that LRRK2's phosphorylation is important for its pathological and physiological functioning. These include a reduced LRRK2 heterologous phosphorylation in PD brains or after pharmacological inhibition of LRRK2 kinase activity as well as the appearance of subcellular LRRK2 accumulations when this protein is dephosphorylated at heterologous phosphosites. Nevertheless, the regulatory mechanisms governing LRRK2 phosphorylation levels and the cellular consequences of changes in LRRK2 phosphorylation remain incompletely understood. In this review, we present current knowledge on LRRK2 phosphorylation, LRRK2 phosphoregulation, and how LRRK2 phosphorylation changes affect cellular processes that may ultimately be linked to PD mechanisms.
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Affiliation(s)
- Antoine Marchand
- University of Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
- Inserm, UMR-S 1172, Team “Brain Biology and Chemistry”, Lille, France
| | - Matthieu Drouyer
- University of Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
- Inserm, UMR-S 1172, Team “Brain Biology and Chemistry”, Lille, France
| | - Alessia Sarchione
- University of Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
- Inserm, UMR-S 1172, Team “Brain Biology and Chemistry”, Lille, France
| | - Marie-Christine Chartier-Harlin
- University of Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
- Inserm, UMR-S 1172, Team “Brain Biology and Chemistry”, Lille, France
| | - Jean-Marc Taymans
- University of Lille, Inserm, CHU Lille, U1172 - LilNCog - Lille Neuroscience & Cognition, Lille, France
- Inserm, UMR-S 1172, Team “Brain Biology and Chemistry”, Lille, France
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27
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Gloeckner CJ, Porras P. Guilt-by-Association - Functional Insights Gained From Studying the LRRK2 Interactome. Front Neurosci 2020; 14:485. [PMID: 32508578 PMCID: PMC7251075 DOI: 10.3389/fnins.2020.00485] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 04/20/2020] [Indexed: 12/11/2022] Open
Abstract
The Parkinson's disease-associated Leucine-rich repeat kinase 2 (LRRK2) is a complex multi-domain protein belonging to the Roco protein family, a unique group of G-proteins. Variants of this gene are associated with an increased risk of Parkinson's disease. Besides its well-characterized enzymatic activities, conferred by its GTPase and kinase domains, and a central dimerization domain, it contains four predicted repeat domains, which are, based on their structure, commonly involved in protein-protein interactions (PPIs). In the past decades, tremendous progress has been made in determining comprehensive interactome maps for the human proteome. Knowledge of PPIs has been instrumental in assigning functions to proteins involved in human disease and helped to understand the connectivity between different disease pathways and also significantly contributed to the functional understanding of LRRK2. In addition to an increased kinase activity observed for proteins containing PD-associated variants, various studies helped to establish LRRK2 as a large scaffold protein in the interface between cytoskeletal dynamics and the vesicular transport. This review first discusses a number of specific LRRK2-associated PPIs for which a functional consequence can at least be speculated upon, and then considers the representation of LRRK2 protein interactions in public repositories, providing an outlook on open research questions and challenges in this field.
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Affiliation(s)
- Christian Johannes Gloeckner
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
- Center for Ophthalmology, Institute for Ophthalmic Research, Core Facility for Medical Bioanalytics, University of Tübingen, Tübingen, Germany
- Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
| | - Pablo Porras
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Cherry Hinton, United Kingdom
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28
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Manschwetus JT, Wallbott M, Fachinger A, Obergruber C, Pautz S, Bertinetti D, Schmidt SH, Herberg FW. Binding of the Human 14-3-3 Isoforms to Distinct Sites in the Leucine-Rich Repeat Kinase 2. Front Neurosci 2020; 14:302. [PMID: 32317922 PMCID: PMC7155755 DOI: 10.3389/fnins.2020.00302] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 03/16/2020] [Indexed: 12/25/2022] Open
Abstract
Proteins of the 14-3-3 family are well known modulators of the leucine-rich repeat kinase 2 (LRRK2) regulating kinase activity, cellular localization, and ubiquitylation. Although binding between those proteins has been investigated, a comparative study of all human 14-3-3 isoforms interacting with LRRK2 is lacking so far. In a comprehensive approach, we quantitatively analyzed the interaction between the seven human 14-3-3 isoforms and LRRK2-derived peptides covering both, reported and putative 14-3-3 binding sites. We observed that phosphorylation is an absolute prerequisite for 14-3-3 binding and generated binding patterns of 14-3-3 isoforms to interact with peptides derived from the N-terminal phosphorylation cluster (S910 and S935), the Roc domain (S1444) and the C-terminus. The tested 14-3-3 binding sites in LRRK2 preferentially were recognized by the isoforms γ and η, whereas the isoforms ϵ and especially σ showed the weakest or no binding. Interestingly, the possible pathogenic mutation Q930R in LRRK2 drastically increases binding affinity to a peptide encompassing pS935. We then identified the autophosphorylation site T2524 as a so far not described 14-3-3 binding site at the very C-terminus of LRRK2. Binding affinities of all seven 14-3-3 isoforms were quantified for all three binding regions with pS1444 displaying the highest affinity of all measured singly phosphorylated peptides. The strongest binding was detected for the combined phosphosites S910 and S935, suggesting that avidity effects are important for high affinity interaction between 14-3-3 proteins and LRRK2.
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Affiliation(s)
| | | | | | | | | | | | | | - Friedrich W. Herberg
- Department of Biochemistry, Institute for Biology, University of Kassel, Kassel, Germany
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29
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Taylor M, Alessi DR. Advances in elucidating the function of leucine-rich repeat protein kinase-2 in normal cells and Parkinson's disease. Curr Opin Cell Biol 2020; 63:102-113. [PMID: 32036294 PMCID: PMC7262585 DOI: 10.1016/j.ceb.2020.01.001] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/31/2019] [Accepted: 01/02/2020] [Indexed: 12/22/2022]
Abstract
Autosomal dominant missense mutations that hyperactivate the leucine-rich repeat protein kinase-2 (LRRK2) are a common cause of inherited Parkinson's disease and therapeutic efficacy of LRRK2 inhibitors is being tested in clinical trials. In this review, we discuss the nuts and bolts of our current understanding of how the LRRK2 is misregulated by mutations and how pathway activity is affected by LRRK2 binding to membrane, microtubule filaments, and 14-3-3, as well as by upstream components such as Rab29 and VPS35. We discuss recent work that points toward a subset of Rab proteins comprising key physiological substrates that bind new sets of effectors, such as RILPL1/2, JIP3 and JIP4 after phosphorylation by LRRK2. We explore what is known about how LRRK2 regulates ciliogenesis, the endosomal-lysosomal system, immune responses and interplay with alpha-synuclein and tau and how this might be linked to Parkinson's' disease.
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Affiliation(s)
- Matthew Taylor
- Medical Research Council Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dow Street, Dundee, DD1 5EH, UK
| | - Dario R Alessi
- Medical Research Council Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dow Street, Dundee, DD1 5EH, UK.
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30
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Cogo S, Manzoni C, Lewis PA, Greggio E. Leucine-rich repeat kinase 2 and lysosomal dyshomeostasis in Parkinson disease. J Neurochem 2020; 152:273-283. [PMID: 31693760 DOI: 10.1111/jnc.14908] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 10/26/2019] [Accepted: 10/31/2019] [Indexed: 12/24/2022]
Abstract
Over the last two decades, a number of studies have underlined the importance of lysosomal-based degradative pathways in maintaining the homeostasis of post-mitotic cells, and revealed the remarkable contribution of a functional autophagic machinery in the promotion of longevity. In contrast, defects in the clearance of organelles and aberrant protein aggregates have been linked to accelerated neuronal loss and neurological dysfunction. Several neurodegenerative disorders, among which Alzheimer disease (AD), Frontotemporal dementia, and Amyotrophic Lateral Sclerosis to name a few, are associated with alterations of the autophagy and endo-lysosomal pathways. In Parkinson disease (PD), the most prevalent genetic determinant, Leucine-rich repeat kinase 2 (LRRK2), is believed to be involved in the regulation of intracellular vesicle traffic, autophagy and lysosomal function. Here, we review the current understanding of the mechanisms by which LRRK2 regulates lysosomal-based degradative pathways in neuronal and non-neuronal cells and discuss the impact of pathogenic PD mutations in contributing to lysosomal dyshomeostasis.
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Affiliation(s)
- Susanna Cogo
- Department of Biology, University of Padova, Padova, Italy
| | - Claudia Manzoni
- School of Pharmacy, University of Reading, Reading, UK
- Department of Neurodegenerative Diseases, University College London, London, UK
| | - Patrick A Lewis
- School of Pharmacy, University of Reading, Reading, UK
- Department of Neurodegenerative Diseases, University College London, London, UK
| | - Elisa Greggio
- Department of Biology, University of Padova, Padova, Italy
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31
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Berwick DC, Heaton GR, Azeggagh S, Harvey K. LRRK2 Biology from structure to dysfunction: research progresses, but the themes remain the same. Mol Neurodegener 2019; 14:49. [PMID: 31864390 PMCID: PMC6925518 DOI: 10.1186/s13024-019-0344-2] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 11/07/2019] [Indexed: 12/12/2022] Open
Abstract
Since the discovery of leucine-rich repeat kinase 2 (LRRK2) as a protein that is likely central to the aetiology of Parkinson’s disease, a considerable amount of work has gone into uncovering its basic cellular function. This effort has led to the implication of LRRK2 in a bewildering range of cell biological processes and pathways, and probable roles in a number of seemingly unrelated medical conditions. In this review we summarise current knowledge of the basic biochemistry and cellular function of LRRK2. Topics covered include the identification of phosphorylation substrates of LRRK2 kinase activity, in particular Rab proteins, and advances in understanding the activation of LRRK2 kinase activity via dimerisation and association with membranes, especially via interaction with Rab29. We also discuss biochemical studies that shed light on the complex LRRK2 GTPase activity, evidence of roles for LRRK2 in a range of cell signalling pathways that are likely cell type specific, and studies linking LRRK2 to the cell biology of organelles. The latter includes the involvement of LRRK2 in autophagy, endocytosis, and processes at the trans-Golgi network, the endoplasmic reticulum and also key microtubule-based cellular structures. We further propose a mechanism linking LRRK2 dimerisation, GTPase function and membrane recruitment with LRRK2 kinase activation by Rab29. Together these data paint a picture of a research field that in many ways is moving forward with great momentum, but in other ways has not changed fundamentally. Many key advances have been made, but very often they seem to lead back to the same places.
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Affiliation(s)
- Daniel C Berwick
- School of Health, Life and Chemical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK.
| | - George R Heaton
- Department of Pharmacology, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK
| | - Sonia Azeggagh
- School of Health, Life and Chemical Sciences, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK
| | - Kirsten Harvey
- Department of Pharmacology, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London, WC1N 1AX, UK.
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32
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Berndsen K, Lis P, Yeshaw WM, Wawro PS, Nirujogi RS, Wightman M, Macartney T, Dorward M, Knebel A, Tonelli F, Pfeffer SR, Alessi DR. PPM1H phosphatase counteracts LRRK2 signaling by selectively dephosphorylating Rab proteins. eLife 2019; 8:e50416. [PMID: 31663853 PMCID: PMC6850886 DOI: 10.7554/elife.50416] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 10/30/2019] [Indexed: 12/19/2022] Open
Abstract
Mutations that activate LRRK2 protein kinase cause Parkinson's disease. LRRK2 phosphorylates a subset of Rab GTPases within their Switch-II motif controlling interaction with effectors. An siRNA screen of all human protein phosphatases revealed that a poorly studied protein phosphatase, PPM1H, counteracts LRRK2 signaling by specifically dephosphorylating Rab proteins. PPM1H knockout increased endogenous Rab phosphorylation and inhibited Rab dephosphorylation in human A549 cells. Overexpression of PPM1H suppressed LRRK2-mediated Rab phosphorylation. PPM1H also efficiently and directly dephosphorylated Rab8A in biochemical studies. A "substrate-trapping" PPM1H mutant (Asp288Ala) binds with high affinity to endogenous, LRRK2-phosphorylated Rab proteins, thereby blocking dephosphorylation seen upon addition of LRRK2 inhibitors. PPM1H is localized to the Golgi and its knockdown suppresses primary cilia formation, similar to pathogenic LRRK2. Thus, PPM1H acts as a key modulator of LRRK2 signaling by controlling dephosphorylation of Rab proteins. PPM1H activity enhancers could offer a new therapeutic approach to prevent or treat Parkinson's disease.
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Affiliation(s)
- Kerryn Berndsen
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life SciencesUniversity of DundeeDundeeUnited Kingdom
| | - Pawel Lis
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life SciencesUniversity of DundeeDundeeUnited Kingdom
| | - Wondwossen M Yeshaw
- Department of BiochemistryStanford University School of MedicineStanfordUnited States
| | - Paulina S Wawro
- Department of BiochemistryStanford University School of MedicineStanfordUnited States
| | - Raja S Nirujogi
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life SciencesUniversity of DundeeDundeeUnited Kingdom
| | - Melanie Wightman
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life SciencesUniversity of DundeeDundeeUnited Kingdom
| | - Thomas Macartney
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life SciencesUniversity of DundeeDundeeUnited Kingdom
| | - Mark Dorward
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life SciencesUniversity of DundeeDundeeUnited Kingdom
| | - Axel Knebel
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life SciencesUniversity of DundeeDundeeUnited Kingdom
| | - Francesca Tonelli
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life SciencesUniversity of DundeeDundeeUnited Kingdom
| | - Suzanne R Pfeffer
- Department of BiochemistryStanford University School of MedicineStanfordUnited States
| | - Dario R Alessi
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life SciencesUniversity of DundeeDundeeUnited Kingdom
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Identification of PP2A and S6 Kinase as Modifiers of Leucine-Rich Repeat Kinase-Induced Neurotoxicity. Neuromolecular Med 2019; 22:218-226. [PMID: 31664682 PMCID: PMC7230064 DOI: 10.1007/s12017-019-08577-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 10/13/2019] [Indexed: 12/03/2022]
Abstract
Mutations in LRRK2 are currently recognized as the most common monogenetic cause of Parkinsonism. The elevation of kinase activity of LRRK2 that frequently accompanies its mutations is widely thought to contribute to its toxicity. Accordingly, many groups have developed LRRK2-specific kinase inhibitors as a potential therapeutic strategy. Given that protein phosphorylation is a reversible event, we sought to elucidate the phosphatase(s) that can reverse LRRK2-mediated phosphorylation, with the view that targeting this phosphatase(s) may similarly be beneficial. Using an unbiased RNAi phosphatase screen conducted in a Drosophila LRRK2 model, we identified PP2A as a genetic modulator of LRRK2-induced neurotoxicity. Further, we also identified ribosomal S6 kinase (S6K), a target of PP2A, as a novel regulator of LRRK2 function. Finally, we showed that modulation of PP2A or S6K activities ameliorates LRRK2-associated disease phenotype in Drosophila.
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34
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Abstract
Kinase activating missense mutations in leucine-rich repeat kinase 2 (LRRK2) are pathogenically linked to neurodegenerative Parkinson's disease (PD). Over the past decade, substantial effort has been devoted to the development of potent and selective small molecule inhibitors of LRRK2, as well as their preclinical testing across different Parkinson's disease models. This review outlines the genetic and biochemical evidence that pathogenic missense mutations increase LRRK2 kinase activity, which in turn provides the rationale for the development of small molecule inhibitors as potential PD therapeutics. An overview of progress in the development of LRRK2 inhibitors is provided, which in particular indicates that highly selective and potent compounds capable of clinical utility have been developed. We outline evidence from rodent- and human-induced pluripotent stem cell models that support a pathogenic role for LRRK2 kinase activity, and review the substantial experiments aimed at evaluating the safety of LRRK2 inhibitors. We address challenges still to overcome in the translational therapeutic pipeline, including biomarker development and clinical trial strategies, and finally outline the potential utility of LRRK2 inhibitors for other genetic forms of PD and ultimately sporadic PD. Collective evidence supports the ongoing clinical translation of LRRK2 inhibitors as a therapeutic intervention for PD is greatly needed.
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Mercatelli D, Bolognesi P, Frassineti M, Pisanò CA, Longo F, Shimshek DR, Morari M. Leucine-rich repeat kinase 2 (LRRK2) inhibitors differentially modulate glutamate release and Serine935 LRRK2 phosphorylation in striatal and cerebrocortical synaptosomes. Pharmacol Res Perspect 2019; 7:e00484. [PMID: 31149340 PMCID: PMC6536420 DOI: 10.1002/prp2.484] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 04/24/2019] [Accepted: 04/26/2019] [Indexed: 01/08/2023] Open
Abstract
Mutations in leucine-rich repeat kinase 2 (LRRK2) gene have been pathogenically linked to Parkinson's disease, and pharmacological inhibition of LRRK2 is being pursued to tackle nigro-striatal dopaminergic neurodegeneration. However, LRRK2 kinase inhibitors may have manifold actions, affecting not only pathological mechanisms in dopaminergic neurons but also physiological functions in nondopaminergic neurons. Therefore, we investigated whether LRRK2 kinase inhibitors differentially modulate dopamine and glutamate release from the mouse striatum and cerebral cortex. Spontaneous and KCl-evoked [3H]-dopamine and glutamate release from superfused synaptosomes obtained from wild-type and LRRK2 knock-out, kinase-dead or G2019S knock-in mice was measured. Two structurally unrelated inhibitors, LRRK2-IN-1 and GSK2578215A, were tested. LRRK2, phosphoSerine1292 and phosphoSerine935 LRRK2 levels were measured in all genotypes, and target engagement was evaluated by monitoring phosphoSerine935 LRRK2. LRRK2-IN-1 inhibited striatal glutamate but not dopamine release; GSK2578215A inhibited striatal dopamine and cortical glutamate but enhanced striatal glutamate release. LRRK2-IN-1 reduced striatal and cortical phosphoSerine935 levels whereas GSK2578215A inhibited only the former. Neither LRRK2 inhibitor affected neurotransmitter release in LRRK2 knock-out and kinase-dead mice; however, they facilitated dopamine without affecting striatal glutamate in G2019S knock-in mice. GSK2578215A inhibited cortical glutamate release in G2019S knock-in mice. We conclude that LRRK2-IN-1 and GSK2578215A modulate exocytosis by blocking LRRK2 kinase activity, although their effects vary depending on the nerve terminal examined. The G2019S mutation unravels a dopamine-promoting action of LRRK2 inhibitors while blunting their effects on glutamate release, which highlights their positive potential for the treatment of PD, especially of LRRK2 mutation carriers.
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Affiliation(s)
- Daniela Mercatelli
- Department of Medical SciencesSection of PharmacologyUniversity of FerraraFerraraItaly
- Neuroscience Center and National Institute of NeuroscienceUniversity of FerraraFerraraItaly
| | - Paolo Bolognesi
- Department of Medical SciencesSection of PharmacologyUniversity of FerraraFerraraItaly
- Neuroscience Center and National Institute of NeuroscienceUniversity of FerraraFerraraItaly
| | - Martina Frassineti
- Department of Medical SciencesSection of PharmacologyUniversity of FerraraFerraraItaly
- Neuroscience Center and National Institute of NeuroscienceUniversity of FerraraFerraraItaly
| | - Clarissa A. Pisanò
- Department of Medical SciencesSection of PharmacologyUniversity of FerraraFerraraItaly
- Neuroscience Center and National Institute of NeuroscienceUniversity of FerraraFerraraItaly
| | - Francesco Longo
- Department of Medical SciencesSection of PharmacologyUniversity of FerraraFerraraItaly
- Neuroscience Center and National Institute of NeuroscienceUniversity of FerraraFerraraItaly
- Present address:
Center for Neural ScienceNew York University4 Washington PlaceNew YorkNY10003USA
| | - Derya R. Shimshek
- Department of NeuroscienceNovartis Institutes for BioMedical ResearchNovartis Pharma AGBaselSwitzerland
| | - Michele Morari
- Department of Medical SciencesSection of PharmacologyUniversity of FerraraFerraraItaly
- Neuroscience Center and National Institute of NeuroscienceUniversity of FerraraFerraraItaly
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Atashrazm F, Hammond D, Perera G, Bolliger MF, Matar E, Halliday GM, Schüle B, Lewis SJG, Nichols RJ, Dzamko N. LRRK2-mediated Rab10 phosphorylation in immune cells from Parkinson's disease patients. Mov Disord 2018; 34:406-415. [PMID: 30597610 DOI: 10.1002/mds.27601] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/01/2018] [Accepted: 12/03/2018] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Leucine-rich repeat kinase 2 is a potential therapeutic target for the treatment of Parkinson's disease, and clinical trials of leucine-rich repeat kinase 2 inhibitors are in development. The objective of this study was to evaluate phosphorylation of a new leucine-rich repeat kinase 2 substrate, Rab10, for potential use as a target engagement biomarker and/or patient enrichment biomarker for leucine-rich repeat kinase 2 inhibitor clinical trials. METHODS Peripheral blood mononuclear cells and neutrophils were isolated from Parkinson's disease patients and matched controls, and treated ex vivo with a leucine-rich repeat kinase 2 inhibitor. Immunoblotting was used to measure levels of leucine-rich repeat kinase 2 and Rab10 and their phosphorylation. Plasma inflammatory cytokines were measured by multiplex enzyme-linked immunosorbent assay. RESULTS Mononuclear cells and neutrophils of both controls and Parkinson's disease patients responded the same to leucine-rich repeat kinase 2 inhibitor treatment. Leucine-rich repeat kinase 2 levels in mononuclear cells were the same in controls and Parkinson's disease patients, whereas leucine-rich repeat kinase 2 was significantly increased in Parkinson's disease neutrophils. Rab10 T73 phosphorylation levels were similar in controls and Parkinson's disease patients and did not correlate with leucine-rich repeat kinase 2 levels. Immune-cell levels of leucine-rich repeat kinase 2 and Rab10 T73 phosphorylation were associated with plasma inflammatory cytokine levels. CONCLUSIONS Rab10 T73 phosphorylation appears to be a valid target engagement biomarker for potential use in leucine-rich repeat kinase 2 inhibitor clinical trials. However, a lack of association between leucine-rich repeat kinase 2 and Rab10 phosphorylation complicates the potential use of Rab10 phosphorylation as a patient enrichment biomarker. Although replication is required, increased leucine-rich repeat kinase 2 levels in neutrophils from Parkinson's disease patients may have the potential for patient stratification. leucine-rich repeat kinase 2 activity in peripheral immune cells may contribute to an inflammatory phenotype. © 2018 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Farzaneh Atashrazm
- Brain and Mind Centre, Central Clinical School, University of Sydney, Camperdown, NSW, Australia
| | - Deborah Hammond
- Forefront Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Camperdown, NSW, Australia
| | - Gayathri Perera
- Brain and Mind Centre, Central Clinical School, University of Sydney, Camperdown, NSW, Australia
| | - Marc F Bolliger
- Parkinson's Institute and Clinical Center, Sunnyvale, California, USA
| | - Elie Matar
- Brain and Mind Centre, Central Clinical School, University of Sydney, Camperdown, NSW, Australia.,Forefront Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Camperdown, NSW, Australia
| | - Glenda M Halliday
- Brain and Mind Centre, Central Clinical School, University of Sydney, Camperdown, NSW, Australia.,Neuroscience Research Australia, Randwick, NSW, Australia.,School of Medical Sciences, University of NSW, Kensington, NSW, Australia
| | - Birgitt Schüle
- Parkinson's Institute and Clinical Center, Sunnyvale, California, USA
| | - Simon J G Lewis
- Brain and Mind Centre, Central Clinical School, University of Sydney, Camperdown, NSW, Australia.,Forefront Parkinson's Disease Research Clinic, Brain and Mind Centre, University of Sydney, Camperdown, NSW, Australia
| | - R Jeremy Nichols
- Parkinson's Institute and Clinical Center, Sunnyvale, California, USA
| | - Nicolas Dzamko
- Brain and Mind Centre, Central Clinical School, University of Sydney, Camperdown, NSW, Australia.,Neuroscience Research Australia, Randwick, NSW, Australia.,School of Medical Sciences, University of NSW, Kensington, NSW, Australia
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37
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De Wit T, Baekelandt V, Lobbestael E. Inhibition of LRRK2 or Casein Kinase 1 Results in LRRK2 Protein Destabilization. Mol Neurobiol 2018; 56:5273-5286. [PMID: 30592011 PMCID: PMC6657425 DOI: 10.1007/s12035-018-1449-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 12/06/2018] [Indexed: 11/25/2022]
Abstract
Mutations and variations in the leucine-rich repeat kinase 2 (LRRK2) gene are strongly associated with an increased risk to develop Parkinson's disease (PD). Most pathogenic LRRK2 mutations display increased kinase activity, which is believed to underlie LRRK2-mediated toxicity. Therefore, major efforts have been invested in the development of potent and selective LRRK2 kinase inhibitors. Several of these compounds have proven beneficial in cells and in vivo, even in a LRRK2 wild-type background. Therefore, LRRK2 kinase inhibition holds great promise as disease-modifying PD therapy, and is currently tested in preclinical and early clinical studies. One of the safety concerns is the development of lung pathology in mice and non-human primates, which is most likely related to the strongly reduced LRRK2 protein levels after LRRK2 kinase inhibition. In this study, we aimed to better understand the molecular consequences of chronic LRRK2 kinase inhibition, which may be pivotal in the further development of a LRRK2 kinase inhibitor-based PD therapy. We found that LRRK2 protein levels are not restored during long-term LRRK2 kinase inhibition, but are recovered upon inhibitor withdrawal. Interestingly, LRRK2 kinase inhibitor-induced destabilization does not occur in all pathogenic LRRK2 variants and the N-terminal part of LRRK2 appears to play a crucial role in this process. In addition, we identified CK1, an upstream kinase of LRRK2, as a regulator of LRRK2 protein stability in cell culture and in vivo. We propose that pharmacological LRRK2 kinase inhibition triggers a cascade that results in reduced CK1-mediated phosphorylation of yet unidentified LRRK2 phosphorylation sites. This process involves the N-terminus of LRRK2 and ultimately leads to LRRK2 protein degradation.
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Affiliation(s)
- T De Wit
- Laboratory for Neurobiology and Gene Therapy, Department of Neurosciences, KU Leuven, Herestraat 49 - Bus 1023, 3000, Leuven, Belgium
| | - V Baekelandt
- Laboratory for Neurobiology and Gene Therapy, Department of Neurosciences, KU Leuven, Herestraat 49 - Bus 1023, 3000, Leuven, Belgium.
| | - E Lobbestael
- Laboratory for Neurobiology and Gene Therapy, Department of Neurosciences, KU Leuven, Herestraat 49 - Bus 1023, 3000, Leuven, Belgium.
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Roco Proteins and the Parkinson's Disease-Associated LRRK2. Int J Mol Sci 2018; 19:ijms19124074. [PMID: 30562929 PMCID: PMC6320773 DOI: 10.3390/ijms19124074] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/11/2018] [Accepted: 12/14/2018] [Indexed: 02/08/2023] Open
Abstract
Small G-proteins are structurally-conserved modules that function as molecular on-off switches. They function in many different cellular processes with differential specificity determined by the unique effector-binding surfaces, which undergo conformational changes during the switching action. These switches are typically standalone monomeric modules that form transient heterodimers with specific effector proteins in the 'on' state, and cycle to back to the monomeric conformation in the 'off' state. A new class of small G-proteins called "Roco" was discovered about a decade ago; this class is distinct from the typical G-proteins in several intriguing ways. Their switch module resides within a polypeptide chain of a large multi-domain protein, always adjacent to a unique domain called COR, and its effector kinase often resides within the same polypeptide. As such, the mechanisms of action of the Roco G-proteins are likely to differ from those of the typical G-proteins. Understanding these mechanisms is important because aberrant activity in the human Roco protein LRRK2 is associated with the pathogenesis of Parkinson's disease. This review provides an update on the current state of our understanding of the Roco G-proteins and the prospects of targeting them for therapeutic purposes.
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Araki M, Ito G, Tomita T. Physiological and pathological functions of LRRK2: implications from substrate proteins. Neuronal Signal 2018; 2:NS20180005. [PMID: 32714591 PMCID: PMC7373236 DOI: 10.1042/ns20180005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 09/18/2018] [Accepted: 09/19/2018] [Indexed: 02/06/2023] Open
Abstract
Leucine-rich repeat kinase 2 (LRRK2) encodes a 2527-amino acid (aa) protein composed of multiple functional domains, including a Ras of complex proteins (ROC)-type GTP-binding domain, a carboxyl terminal of ROC (COR) domain, a serine/threonine protein kinase domain, and several repeat domains. LRRK2 is genetically involved in the pathogenesis of both sporadic and familial Parkinson's disease (FPD). Parkinson's disease (PD) is the second most common neurodegenerative disorder, manifesting progressive motor dysfunction. PD is pathologically characterized by the loss of dopaminergic neurons in the substantia nigra pars compacta, and the presence of intracellular inclusion bodies called Lewy bodies (LB) in the remaining neurons. As the most frequent PD-causing mutation in LRRK2, G2019S, increases the kinase activity of LRRK2, an abnormal increase in LRRK2 kinase activity is believed to contribute to PD pathology; however, the precise biological functions of LRRK2 involved in PD pathogenesis remain unknown. Although biochemical studies have discovered several substrate proteins of LRRK2 including Rab GTPases and tau, little is known about whether excess phosphorylation of these substrates is the cause of the neurodegeneration in PD. In this review, we summarize latest findings regarding the physiological and pathological functions of LRRK2, and discuss the possible molecular mechanisms of neurodegeneration caused by LRRK2 and its substrates.
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Affiliation(s)
- Miho Araki
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Genta Ito
- Laboratory of Brain and Neurological Disorders, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Taisuke Tomita
- Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Laboratory of Brain and Neurological Disorders, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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40
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Nigrostriatal pathology with reduced astrocytes in LRRK2 S910/S935 phosphorylation deficient knockin mice. Neurobiol Dis 2018; 120:76-87. [PMID: 30194047 PMCID: PMC6197399 DOI: 10.1016/j.nbd.2018.09.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 08/09/2018] [Accepted: 09/03/2018] [Indexed: 12/13/2022] Open
Abstract
Leucine-rich repeat kinase 2 (LRRK2) is genetically implicated in both familial and sporadic Parkinson's disease (PD). Moreover, LRRK2 has emerged as a compelling therapeutic target for the treatment of PD. Consequently, there is much interest in understanding LRRK2 and its role in PD pathogenesis. LRRK2 is constitutively phosphorylated on two serines, S910 and S935, that are required for interaction of LRRK2 with members of the 14-3-3 family of scaffolding proteins. Pathogenic LRRK2 missense mutations impair the phosphorylation of LRRK2 at these sites, but whether this contributes to PD pathology is unclear. To better understand how loss of LRRK2 phosphorylation relates to PD pathology, we have studied double knockin mice in which Lrrk2's serine 910 and 935 have both been mutated to alanine and can therefore no longer be phosphorylated. Nigrostriatal PD pathology was assessed in adult mice, aged mice, and mice inoculated with α-synuclein fibrils. Under all paradigms there was evidence of early PD pathology in the striatum of the knockin mice, namely alterations in dopamine regulating proteins and accumulation of α-synuclein. Striatal pathology was accompanied by a significant decrease in the number of astrocytes in the knockin mice. Despite striatal pathology, there was no degeneration of dopamine neurons in the substantia nigra and no evidence of a PD motor phenotype in the knockin mice. Our results suggest that modulation of LRRK2 serine 910 and 935 phosphorylation sites may have implications for dopamine turnover and astrocyte function, but loss of phosphorylation at these residues is not sufficient to induce PD neurodegeneration.
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Abstract
The LRRK2 gene is a major contributor to genetic risk for Parkinson's disease and understanding the biology of the leucine-rich repeat kinase 2 (LRRK2, the protein product of this gene) is an important goal in Parkinson's research. LRRK2 is a multi-domain, multi-activity enzyme and has been implicated in a wide range of signalling events within the cell. Because of the complexities of the signal transduction pathways in which LRRK2 is involved, it has been challenging to generate a clear idea as to how mutations and disease associated variants in this gene are altered in disease. Understanding the events in which LRRK2 is involved at a systems level is therefore critical to fully understand the biology and pathobiology of this protein and is the subject of this review.
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Affiliation(s)
- Alice Price
- School of Pharmacy, University of Reading, Whiteknights, Reading, RG6 6AP, UK
| | - Claudia Manzoni
- School of Pharmacy, University of Reading, Whiteknights, Reading, RG6 6AP, UK
- Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Mark R Cookson
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Building. 35, 35 Convent Drive, Bethesda, MD, 20892, USA
| | - Patrick A Lewis
- School of Pharmacy, University of Reading, Whiteknights, Reading, RG6 6AP, UK.
- Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK.
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Murillo-de-Ozores AR, Rodríguez-Gama A, Bazúa-Valenti S, Leyva-Ríos K, Vázquez N, Pacheco-Álvarez D, De La Rosa-Velázquez IA, Wengi A, Stone KL, Zhang J, Loffing J, Lifton RP, Yang CL, Ellison DH, Gamba G, Castañeda-Bueno M. C-terminally truncated, kidney-specific variants of the WNK4 kinase lack several sites that regulate its activity. J Biol Chem 2018; 293:12209-12221. [PMID: 29921588 DOI: 10.1074/jbc.ra118.003037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 06/14/2018] [Indexed: 12/13/2022] Open
Abstract
WNK lysine-deficient protein kinase 4 (WNK4) is an important regulator of renal salt handling. Mutations in its gene cause pseudohypoaldosteronism type II, mainly arising from overactivation of the renal Na+/Cl- cotransporter (NCC). In addition to full-length WNK4, we have observed faster migrating bands (between 95 and 130 kDa) in Western blots of kidney lysates. Therefore, we hypothesized that these could correspond to uncharacterized WNK4 variants. Here, using several WNK4 antibodies and WNK4-/- mice as controls, we showed that these bands indeed correspond to short WNK4 variants that are not observed in other tissue lysates. LC-MS/MS confirmed these bands as WNK4 variants that lack C-terminal segments. In HEK293 cells, truncation of WNK4's C terminus at several positions increased its kinase activity toward Ste20-related proline/alanine-rich kinase (SPAK), unless the truncated segment included the SPAK-binding site. Of note, this gain-of-function effect was due to the loss of a protein phosphatase 1 (PP1)-binding site in WNK4. Cotransfection with PP1 resulted in WNK4 dephosphorylation, an activity that was abrogated in the PP1-binding site WNK4 mutant. The electrophoretic mobility of the in vivo short variants of renal WNK4 suggested that they lack the SPAK-binding site and thus may not behave as constitutively active kinases toward SPAK. Finally, we show that at least one of the WNK4 short variants may be produced by proteolysis involving a Zn2+-dependent metalloprotease, as recombinant full-length WNK4 was cleaved when incubated with kidney lysate.
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Affiliation(s)
| | - Alejandro Rodríguez-Gama
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico
| | - Silvana Bazúa-Valenti
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico
| | - Karla Leyva-Ríos
- Escuela de Medicina, Universidad Panamericana, Mexico City 03920, Mexico
| | - Norma Vázquez
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico
| | | | - Inti A De La Rosa-Velázquez
- Genomics Laboratory, RAI, Universidad Nacional Autónoma de México-Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City 14080, Mexico
| | - Agnieszka Wengi
- Institute of Anatomy and Swiss National Centre of Competence in Research "Kidney Control of Homeostasis," University of Zurich, Zurich 8057, Switzerland
| | - Kathryn L Stone
- MS and Proteomics Resource, W. M. Keck Biotechnology Resource Laboratory, Yale University School of Medicine, New Haven 06510, Connecticut
| | - Junhui Zhang
- Department of Genetics, Yale University School of Medicine, New Haven 06510, Connecticut
| | - Johannes Loffing
- Institute of Anatomy and Swiss National Centre of Competence in Research "Kidney Control of Homeostasis," University of Zurich, Zurich 8057, Switzerland
| | - Richard P Lifton
- Department of Genetics, Yale University School of Medicine, New Haven 06510, Connecticut; Laboratory of Human Genetics and Genomics, Rockefeller University, New York, New York 10065
| | - Chao-Ling Yang
- Division of Nephrology and Hypertension, Department of Medicine, Oregon Health and Science University, Portland, Oregon 97239; Veterans Affairs Portland Health Care System, Portland, Oregon 97239
| | - David H Ellison
- Division of Nephrology and Hypertension, Department of Medicine, Oregon Health and Science University, Portland, Oregon 97239; Veterans Affairs Portland Health Care System, Portland, Oregon 97239
| | - Gerardo Gamba
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City 14080, Mexico; Department of Nephrology and Mineral Metabolism, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City 14080, Mexico; Tecnológico de Monterrey, Escuela de Medicina y Ciencias de la Salud, Monterrey 64710, Nuevo León, Mexico
| | - Maria Castañeda-Bueno
- Department of Nephrology and Mineral Metabolism, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico City 14080, Mexico.
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P62/SQSTM1 is a novel leucine-rich repeat kinase 2 (LRRK2) substrate that enhances neuronal toxicity. Biochem J 2018. [PMID: 29519959 DOI: 10.1042/bcj20170699] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Autosomal-dominant, missense mutations in the leucine-rich repeat protein kinase 2 (LRRK2) gene are the most common genetic predisposition to develop Parkinson's disease (PD). LRRK2 kinase activity is increased in several pathogenic mutations (N1437H, R1441C/G/H, Y1699C, G2019S), implicating hyperphosphorylation of a substrate in the pathogenesis of the disease. Identification of the downstream targets of LRRK2 is a crucial endeavor in the field to understand LRRK2 pathway dysfunction in the disease. We have identified the signaling adapter protein p62/SQSTM1 as a novel endogenous interacting partner and a substrate of LRRK2. Using mass spectrometry and phospho-specific antibodies, we found that LRRK2 phosphorylates p62 on Thr138 in vitro and in cells. We found that the pathogenic LRRK2 PD-associated mutations (N1437H, R1441C/G/H, Y1699C, G2019S) increase phosphorylation of p62 similar to previously reported substrate Rab proteins. Notably, we found that the pathogenic I2020T mutation and the risk factor mutation G2385R displayed decreased phosphorylation of p62. p62 phosphorylation by LRRK2 is blocked by treatment with selective LRRK2 inhibitors in cells. We also found that the amino-terminus of LRRK2 is crucial for optimal phosphorylation of Rab7L1 and p62 in cells. LRRK2 phosphorylation of Thr138 is dependent on a p62 functional ubiquitin-binding domain at its carboxy-terminus. Co-expression of p62 with LRRK2 G2019S increases the neurotoxicity of this mutation in a manner dependent on Thr138. p62 is an additional novel substrate of LRRK2 that regulates its toxic biology, reveals novel signaling nodes and can be used as a pharmacodynamic marker for LRRK2 kinase activity.
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44
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Athanasopoulos PS, Heumann R, Kortholt A. The role of (auto)-phosphorylation in the complex activation mechanism of LRRK2. Biol Chem 2018. [DOI: 10.1515/hsz-2017-0332] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Mutations in human leucine-rich-repeat kinase 2 (LRRK2) have been found to be the most frequent cause of late-onset Parkinson’s Disease (PD). LRRK2 is a large protein with two enzymatic domains, a GTPase and a kinase domain. A cluster of (auto)-phosphorylation sites within the N-terminus of LRRK2 have been shown to be crucial for the localization of LRRK2 and is important for PD pathogenesis. In addition, phosphorylation of sites within the G-domain of the protein affect GTPase activity. Here we discuss the role of these (auto)-phosphorylation sites of LRRK2 and their regulation by phosphatases and upstream kinases.
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Affiliation(s)
- Panagiotis S. Athanasopoulos
- Department of Cell Biochemistry , University of Groningen , Nijenborgh 7 , NL-9747 AG Groningen , The Netherlands
- Faculty of Chemistry and Biochemistry , Molecular Neurobiochemistry, Ruhr University Bochum , Universitätstrasse 150 , D-44780 Bochum , Germany
| | - Rolf Heumann
- Faculty of Chemistry and Biochemistry , Molecular Neurobiochemistry, Ruhr University Bochum , Universitätstrasse 150 , D-44780 Bochum , Germany
| | - Arjan Kortholt
- Department of Cell Biochemistry , University of Groningen , Nijenborgh 7 , NL-9747 AG Groningen , The Netherlands
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45
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Abstract
Mutations in the gene encoding leucine-rich repeat kinase 2 (LRRK2) are known today as the most common genetic cause of Parkinson's disease (PD). LRRK2 is a large protein that is hypothesized to regulate other proteins as a scaffold in downstream signaling pathways. This is supported by the multiple domain composition of LRRK2 with several protein-protein interaction domains combined with kinase and GTPase activity. LRRK2 is highly phosphorylated at sites that are strictly controlled by upstream regulators, including its own kinase domain. In cultured cells, most pathogenic mutants display increased autophosphorylation at S1292, but decreased phosphorylation at sites controlled by other kinases. We only begin to understand how LRRK2 phosphorylation is regulated and how this impacts its physiological and pathological function. Intriguingly, LRRK2 kinase inhibition, currently one of the most prevailing disease-modifying therapeutic strategies for PD, induces LRRK2 dephosphorylation at sites that are also dephosphorylated in pathogenic variants. In addition, LRRK2 kinase inhibition can induce LRRK2 protein degradation, which might be related to the observed inhibitor-induced adverse effects on the lung in rodents and non-human primates, as it resembles the lung pathology in LRRK2 knock-out animals. In this review, we will provide an overview of how LRRK2 phosphorylation is regulated and how this complex regulation relates to several molecular and cellular features of LRRK2.
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Affiliation(s)
- Tina De Wit
- 1 Laboratory for Neurobiology and Gene Therapy, Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Veerle Baekelandt
- 1 Laboratory for Neurobiology and Gene Therapy, Department of Neurosciences, KU Leuven, Leuven, Belgium
| | - Evy Lobbestael
- 1 Laboratory for Neurobiology and Gene Therapy, Department of Neurosciences, KU Leuven, Leuven, Belgium
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46
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Gu J, Wang W, Miao S, Chen F, Wu F, Hu W, Iqbal K, Gong CX, Liu F. Protein Phosphatase 1 dephosphorylates TDP-43 and suppresses its function in tau exon 10 inclusion. FEBS Lett 2018; 592:402-410. [PMID: 29334120 DOI: 10.1002/1873-3468.12976] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 12/28/2017] [Accepted: 01/03/2018] [Indexed: 12/30/2022]
Abstract
Transactive response DNA-binding protein of 43 kDa (TDP-43) regulates RNA processing, including alternative splicing of tau exon 10. Pathological TDP-43 is hyperphosphorylated. However, how do the protein phosphatase(s) (PP) regulate TDP-43 phosphorylation is unclear. Here, we found that both PP1 and PP2A were coimmunoprecipitated with TDP-43. Treatment with calyculin A, but not with okadaic acid, increased TDP-43 phosphorylation at Ser379, Ser403/404, and Ser409/410 in cultured cells. PP1α, PP1β, and PP1γ interacted with TDP-43. Overexpression of PP1α and PP1γ, but not PP1β, suppressed TDP-43 phosphorylation at Ser403/404 and Ser409/410 and TDP-43-induced tau exon 10 inclusion. These findings suggest that PP1α and PP1γ regulate TDP-43 phosphorylation and its function in tau exon 10 inclusion mainly through its phosphorylation at Ser403/404 and Ser409/410.
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Affiliation(s)
- Jianlan Gu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education of China, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China.,Department of Neurochemistry, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA.,Department of Biochemistry and Molecular Biology, School of Medicine, Nantong University, Jiangsu, China
| | - Weihua Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education of China, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China
| | - Shichen Miao
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education of China, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China
| | - Feng Chen
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education of China, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China.,Department of Neurochemistry, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Feng Wu
- Department of Neurochemistry, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Wen Hu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education of China, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China.,Department of Neurochemistry, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Khalid Iqbal
- Department of Neurochemistry, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Cheng-Xin Gong
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education of China, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China.,Department of Neurochemistry, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
| | - Fei Liu
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education of China, Co-Innovation Center of Neuroregeneration, Nantong University, Jiangsu, China.,Department of Neurochemistry, New York State Institute for Basic Research in Developmental Disabilities, Staten Island, NY, USA
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47
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Madero-Pérez J, Fdez E, Fernández B, Lara Ordóñez AJ, Blanca Ramírez M, Gómez-Suaga P, Waschbüsch D, Lobbestael E, Baekelandt V, Nairn AC, Ruiz-Martínez J, Aiastui A, López de Munain A, Lis P, Comptdaer T, Taymans JM, Chartier-Harlin MC, Beilina A, Gonnelli A, Cookson MR, Greggio E, Hilfiker S. Parkinson disease-associated mutations in LRRK2 cause centrosomal defects via Rab8a phosphorylation. Mol Neurodegener 2018; 13:3. [PMID: 29357897 PMCID: PMC5778812 DOI: 10.1186/s13024-018-0235-y] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 01/12/2018] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Mutations in LRRK2 are a common genetic cause of Parkinson's disease (PD). LRRK2 interacts with and phosphorylates a subset of Rab proteins including Rab8a, a protein which has been implicated in various centrosome-related events. However, the cellular consequences of such phosphorylation remain elusive. METHODS Human neuroblastoma SH-SY5Y cells stably expressing wildtype or pathogenic LRRK2 were used to test for polarity defects in the context of centrosomal positioning. Centrosomal cohesion deficits were analyzed from transiently transfected HEK293T cells, as well as from two distinct peripheral cell types derived from LRRK2-PD patients. Kinase assays, coimmunoprecipitation and GTP binding/retention assays were used to address Rab8a phosphorylation by LRRK2 and its effects in vitro. Transient transfections and siRNA experiments were performed to probe for the implication of Rab8a and its phosphorylated form in the centrosomal deficits caused by pathogenic LRRK2. RESULTS Here, we show that pathogenic LRRK2 causes deficits in centrosomal positioning with effects on neurite outgrowth, cell polarization and directed migration. Pathogenic LRRK2 also causes deficits in centrosome cohesion which can be detected in peripheral cells derived from LRRK2-PD patients as compared to healthy controls, and which are reversed upon LRRK2 kinase inhibition. The centrosomal cohesion and polarity deficits can be mimicked when co-expressing wildtype LRRK2 with wildtype but not phospho-deficient Rab8a. The centrosomal defects induced by pathogenic LRRK2 are associated with a kinase activity-dependent increase in the centrosomal localization of phosphorylated Rab8a, and are prominently reduced upon RNAi of Rab8a. CONCLUSIONS Our findings reveal a new function of LRRK2 mediated by Rab8a phosphorylation and related to various centrosomal defects.
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Affiliation(s)
- Jesús Madero-Pérez
- Institute of Parasitology and Biomedicine "López-Neyra", Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016, Granada, Spain
| | - Elena Fdez
- Institute of Parasitology and Biomedicine "López-Neyra", Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016, Granada, Spain
| | - Belén Fernández
- Institute of Parasitology and Biomedicine "López-Neyra", Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016, Granada, Spain
| | - Antonio J Lara Ordóñez
- Institute of Parasitology and Biomedicine "López-Neyra", Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016, Granada, Spain
| | - Marian Blanca Ramírez
- Institute of Parasitology and Biomedicine "López-Neyra", Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016, Granada, Spain
| | - Patricia Gómez-Suaga
- Institute of Parasitology and Biomedicine "López-Neyra", Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016, Granada, Spain
| | - Dieter Waschbüsch
- Department of Experimental Tumorbiology, Westfälische Wilhelms University Münster, Münster, Germany
| | - Evy Lobbestael
- Laboratory for Neurobiology and Gene Therapy, KU Leuven, 3000, Leuven, Belgium
| | - Veerle Baekelandt
- Laboratory for Neurobiology and Gene Therapy, KU Leuven, 3000, Leuven, Belgium
| | - Angus C Nairn
- Department of Psychiatry, Yale University School of Medicine, New Haven, USA
| | | | - Ana Aiastui
- Cell Culture Platform and Division of Neurosciences, Instituto Biodonostia, San Sebastián, Spain
| | - Adolfo López de Munain
- Division of Neurosciences, Instituto Biodonostia-CIBERNED, San Sebastián, Spain.,Division of Neurosciences, Instituto Biodonostia-CIBERNED, University of the Basque Country UPV-EHU, San Sebastián, Spain
| | - Pawel Lis
- Medical Research Council Protein Phosphorylation and Ubiquitylation Unit, College of Life Sciences, University of Dundee, Dundee, Scotland, DD1 5EH, UK
| | - Thomas Comptdaer
- University of Lille, Inserm, CHU Lille, UMR-S 1172 - JPArc - Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, F-59000, Lille, France
| | - Jean-Marc Taymans
- University of Lille, Inserm, CHU Lille, UMR-S 1172 - JPArc - Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, F-59000, Lille, France
| | - Marie-Christine Chartier-Harlin
- University of Lille, Inserm, CHU Lille, UMR-S 1172 - JPArc - Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, F-59000, Lille, France
| | - Alexandria Beilina
- Cell Biology and Gene Expression Section, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Adriano Gonnelli
- Department of Biology, University of Padova, 35131, Padova, Italy
| | - Mark R Cookson
- Cell Biology and Gene Expression Section, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA
| | - Elisa Greggio
- Department of Biology, University of Padova, 35131, Padova, Italy
| | - Sabine Hilfiker
- Institute of Parasitology and Biomedicine "López-Neyra", Consejo Superior de Investigaciones Científicas (CSIC), Avda del Conocimiento s/n, 18016, Granada, Spain.
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Civiero L, Cogo S, Kiekens A, Morganti C, Tessari I, Lobbestael E, Baekelandt V, Taymans JM, Chartier-Harlin MC, Franchin C, Arrigoni G, Lewis PA, Piccoli G, Bubacco L, Cookson MR, Pinton P, Greggio E. PAK6 Phosphorylates 14-3-3γ to Regulate Steady State Phosphorylation of LRRK2. Front Mol Neurosci 2017; 10:417. [PMID: 29311810 PMCID: PMC5735978 DOI: 10.3389/fnmol.2017.00417] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 11/30/2017] [Indexed: 12/28/2022] Open
Abstract
Mutations in Leucine-rich repeat kinase 2 (LRRK2) are associated with Parkinson's disease (PD) and, as such, LRRK2 is considered a promising therapeutic target for age-related neurodegeneration. Although the cellular functions of LRRK2 in health and disease are incompletely understood, robust evidence indicates that PD-associated mutations alter LRRK2 kinase and GTPase activities with consequent deregulation of the downstream signaling pathways. We have previously demonstrated that one LRRK2 binding partner is P21 (RAC1) Activated Kinase 6 (PAK6). Here, we interrogate the PAK6 interactome and find that PAK6 binds a subset of 14-3-3 proteins in a kinase dependent manner. Furthermore, PAK6 efficiently phosphorylates 14-3-3γ at Ser59 and this phosphorylation serves as a switch to dissociate the chaperone from client proteins including LRRK2, a well-established 14-3-3 binding partner. We found that 14-3-3γ phosphorylated by PAK6 is no longer competent to bind LRRK2 at phospho-Ser935, causing LRRK2 dephosphorylation. To address whether these interactions are relevant in a neuronal context, we demonstrate that a constitutively active form of PAK6 rescues the G2019S LRRK2-associated neurite shortening through phosphorylation of 14-3-3γ. Our results identify PAK6 as the kinase for 14-3-3γ and reveal a novel regulatory mechanism of 14-3-3/LRRK2 complex in the brain.
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Affiliation(s)
- Laura Civiero
- Department of Biology, University of Padova, Padova, Italy
| | - Susanna Cogo
- Department of Biology, University of Padova, Padova, Italy
- School of Pharmacy, University of Reading, Reading, United Kingdom
| | | | - Claudia Morganti
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Ferrara, Italy
| | | | - Evy Lobbestael
- Laboratory for Neurobiology and Gene Therapy, KU Leuven, Leuven, Belgium
| | - Veerle Baekelandt
- Laboratory for Neurobiology and Gene Therapy, KU Leuven, Leuven, Belgium
| | - Jean-Marc Taymans
- Université de Lille, Institut National de la Santé et de la Recherche Médicale, CHU Lille, UMR-S1172, JPArc, Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, Lille, France
- Institut National de la Santé et de la Recherche Médicale, UMR-S 1172, Team “Early Stages of Parkinson's Disease”, Lille, France
| | - Marie-Christine Chartier-Harlin
- Université de Lille, Institut National de la Santé et de la Recherche Médicale, CHU Lille, UMR-S1172, JPArc, Centre de Recherche Jean-Pierre AUBERT Neurosciences et Cancer, Lille, France
- Institut National de la Santé et de la Recherche Médicale, UMR-S 1172, Team “Early Stages of Parkinson's Disease”, Lille, France
| | - Cinzia Franchin
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Proteomics Center, University of Padova and Azienda Ospedaliera di Padova, Padova, Italy
| | - Giorgio Arrigoni
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Proteomics Center, University of Padova and Azienda Ospedaliera di Padova, Padova, Italy
| | - Patrick A. Lewis
- School of Pharmacy, University of Reading, Reading, United Kingdom
| | - Giovanni Piccoli
- Center for Integrative Biology, University of Trento, Trento, Italy
| | - Luigi Bubacco
- Department of Biology, University of Padova, Padova, Italy
| | - Mark R. Cookson
- Laboratory of Neurogenetics, National Institute on Aging/NIH, Bethesda, MD, United States
| | - Paolo Pinton
- Department of Morphology, Surgery and Experimental Medicine, University of Ferrara, Ferrara, Italy
| | - Elisa Greggio
- Department of Biology, University of Padova, Padova, Italy
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49
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West AB. Achieving neuroprotection with LRRK2 kinase inhibitors in Parkinson disease. Exp Neurol 2017; 298:236-245. [PMID: 28764903 PMCID: PMC5693612 DOI: 10.1016/j.expneurol.2017.07.019] [Citation(s) in RCA: 106] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 07/11/2017] [Accepted: 07/28/2017] [Indexed: 01/10/2023]
Abstract
In the translation of discoveries from the laboratory to the clinic, the track record in developing disease-modifying therapies in neurodegenerative disease is poor. A carefully designed development pipeline built from discoveries in both pre-clinical models and patient populations is necessary to optimize the chances for success. Genetic variation in the leucine-rich repeat kinase two gene (LRRK2) is linked to Parkinson disease (PD) susceptibility. Pathogenic mutations, particularly those in the LRRK2 GTPase (Roc) and COR domains, increase LRRK2 kinase activities in cells and tissues. In some PD models, small molecule LRRK2 kinase inhibitors that block these activities also provide neuroprotection. Herein, the genetic and biochemical evidence that supports the involvement of LRRK2 kinase activity in PD susceptibility is reviewed. Issues related to the definition of a therapeutic window for LRRK2 inhibition and the safety of chronic dosing are discussed. Finally, recommendations are given for a biomarker-guided initial entry of LRRK2 kinase inhibitors in PD patients. Four key areas must be considered for achieving neuroprotection with LRRK2 kinase inhibitors in PD: 1) identification of patient populations most likely to benefit from LRRK2 kinase inhibitors, 2) prioritization of superior LRRK2 small molecule inhibitors based on open disclosures of drug performance, 3) incorporation of biomarkers and empirical measures of LRRK2 kinase inhibition in clinical trials, and 4) utilization of appropriate efficacy measures guided in part by rigorous pre-clinical modeling. Meticulous and rational development decisions can potentially prevent incredibly costly errors and provide the best chances for LRRK2 inhibitors to slow the progression of PD.
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Affiliation(s)
- Andrew B West
- Center for Neurodegeneration and Experimental Therapeutics, 1719 6th Ave. South, University of Alabama at Birmingham, Birmingham, AL 35294, United States of America.
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50
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LRRK2: from kinase to GTPase to microtubules and back. Biochem Soc Trans 2017; 45:141-146. [PMID: 28202667 DOI: 10.1042/bst20160333] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 10/14/2016] [Accepted: 10/18/2016] [Indexed: 12/21/2022]
Abstract
Mutations in the Leucine-Rich Repeat Kinase 2 (LRRK2) gene are intimately linked to both familial and sporadic Parkinson's disease. LRRK2 is a large protein kinase able to bind and hydrolyse GTP. A wealth of in vitro studies have established that the distinct pathogenic LRRK2 mutants differentially affect those enzymatic activities, either causing an increase in kinase activity without altering GTP binding/GTP hydrolysis, or displaying no change in kinase activity but increased GTP binding/decreased GTP hydrolysis. Importantly, recent studies have shown that all pathogenic LRRK2 mutants display increased kinase activity towards select kinase substrates when analysed in intact cells. To understand those apparently discrepant results, better insight into the cellular role(s) of normal and pathogenic LRRK2 is crucial. Various studies indicate that LRRK2 regulates numerous intracellular vesicular trafficking pathways, but the mechanism(s) by which the distinct pathogenic mutants may equally interfere with such pathways has largely remained elusive. Here, we summarize the known alterations in the catalytic activities of the distinct pathogenic LRRK2 mutants and propose a testable working hypothesis by which the various mutants may affect membrane trafficking events in identical ways by culminating in increased phosphorylation of select substrate proteins known to be crucial for membrane trafficking between specific cellular compartments.
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