1. PRKAR1B mutation associated with a new neurodegenerative disorder with unique pathology
- Author
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Wong TH, Chiu WZ, Breedveld GJ, Li KW, Verkerk AJ, Hondius D, Hukema RK, Seelaar H, Frick P, Severijnen LA, Lammers GJ, Lebbink JH, van Duinen SG, Kamphorst W, Rozemuller AJ, Bakker EB, Neumann M, Willemsen R, Bonifati V, Smit AB, van Swieten J, Netherlands Brain Bank, International Parkinsonism Genetics Network, Ferreira J, Correia Guedes L, Chien HF, Barbosa ER, Merola A, Zibetti M, Lopiano L, Tassorelli C, Pacchetti C, Nappi G, Riboldazzi G, Bono G, Padovani A, Borroni B, Fincati E, Bertolasi L, Tinazzi M, Bonizzato A, Dalla Libera A, Guidi M, Marini P, Massaro F, Marconi R, Onofrj M, Thomas A, Vanacore N, Meco G, Fabbrini G, Fabrizio E, Manfredi M, Berardelli A, Stocchi F, Vacca L, De Mari M, Dell'Aquila C, Iliceto G, Lamberti P, Toni V, Trianni G, Saddi V, Cossu G, Melis M., CORTELLI, PIETRO, CAPELLARI, SABINA, Pathology, Human genetics, Neurology, NCA - neurodegeneration, Clinical Genetics, Internal Medicine, Molecular Genetics, Obstetrics & Gynecology, Molecular and Cellular Neurobiology, Neuroscience Campus Amsterdam - Neurodegeneration, AIMMS, Netherlands Institute for Neuroscience (NIN), Wong TH, Chiu WZ, Breedveld GJ, Li KW, Verkerk AJ, Hondius D, Hukema RK, Seelaar H, Frick P, Severijnen LA, Lammers GJ, Lebbink JH, van Duinen SG, Kamphorst W, Rozemuller AJ, Bakker EB, Neumann M, Willemsen R, Bonifati V, Smit AB, van Swieten J, Netherlands Brain Bank, International Parkinsonism Genetics Network, Ferreira J, Correia Guedes L, Chien HF, Barbosa ER, Merola A, Zibetti M, Lopiano L, Tassorelli C, Pacchetti C, Nappi G, Riboldazzi G, Bono G, Padovani A, Borroni B, Fincati E, Bertolasi L, Tinazzi M, Bonizzato A, Dalla Libera A, Cortelli P, Capellari S, Guidi M, Marini P, Massaro F, Marconi R, Onofrj M, Thomas A, Vanacore N, Meco G, Fabbrini G, Fabrizio E, Manfredi M, Berardelli A, Stocchi F, Vacca L, De Mari M, Dell'Aquila C, Iliceto G, Lamberti P, Toni V, Trianni G, Saddi V, Cossu G, and Melis M
- Subjects
Models, Molecular ,Male ,Electron Microscope Tomography ,Pathology ,neurofilament ,metabolism [Cyclic AMP-Dependent Protein Kinase Catalytic Subunits] ,pathology [Frontal Lobe] ,0302 clinical medicine ,chemistry [Cyclic AMP-Dependent Protein Kinase Catalytic Subunits] ,Models ,Missense mutation ,metabolism [alpha-Synuclein] ,Intermediate filament ,0303 health sciences ,Parkinsonism ,pathology [Neurodegenerative Diseases] ,Neurodegenerative Diseases ,Single Nucleotide ,SDG 10 - Reduced Inequalities ,Middle Aged ,Frontal Lobe ,3. Good health ,DNA-Binding Proteins ,genetics [Cyclic AMP-Dependent Protein Kinase RIbeta Subunit] ,metabolism [Frontal Lobe] ,PRKAR1B ,neurodegenerative disorders ,genetics [Polymorphism, Single Nucleotide] ,alpha-Synuclein ,Female ,metabolism [DNA-Binding Proteins] ,Frontotemporal dementia ,medicine.medical_specialty ,Neurofilament ,Protein subunit ,metabolism [Amyloid beta-Peptides] ,Nerve Tissue Proteins ,tau Proteins ,Biology ,Polymorphism, Single Nucleotide ,03 medical and health sciences ,medicine ,Humans ,ddc:610 ,Polymorphism ,Protein kinase A ,Hereditary Neurodegenerative Disorder ,Genetic Association Studies ,Aged ,030304 developmental biology ,Family Health ,intermediate filament ,Cyclic AMP-Dependent Protein Kinase Catalytic Subunits ,metabolism [Nerve Tissue Proteins] ,Amyloid beta-Peptides ,protein kinase A Calpha ,protein kinase A ,Molecular ,medicine.disease ,Molecular biology ,metabolism [tau Proteins] ,ultrastructure [Frontal Lobe] ,PRKAR1B protein, human ,genetics [Neurodegenerative Diseases] ,Parkinson’s disease ,Cyclic AMP-Dependent Protein Kinase RIbeta Subunit ,Neurology (clinical) ,030217 neurology & neurosurgery - Abstract
Inclusions of intermediate filaments are found in a number of neurodegenerative diseases. Using whole exome sequencing, linkage analysis and proteomics, Wong and Chiu et al. identify a new familial neurodegenerative disease with intermediate filament inclusions, linked to a mutation in the gene encoding the PKA type I-beta regulatory subunit, PRKAR1B.Pathological accumulation of intermediate filaments can be observed in neurodegenerative disorders, such as Alzheimer's disease, frontotemporal dementia and Parkinson's disease, and is also characteristic of neuronal intermediate filament inclusion disease. Intermediate filaments type IV include three neurofilament proteins (light, medium and heavy molecular weight neurofilament subunits) and alpha-internexin. The phosphorylation of intermediate filament proteins contributes to axonal growth, and is regulated by protein kinase A. Here we describe a family with a novel late-onset neurodegenerative disorder presenting with dementia and/or parkinsonism in 12 affected individuals. The disorder is characterized by a unique neuropathological phenotype displaying abundant neuronal inclusions by haematoxylin and eosin staining throughout the brain with immunoreactivity for intermediate filaments. Combining linkage analysis, exome sequencing and proteomics analysis, we identified a heterozygous c.149T > G (p.Leu50Arg) missense mutation in the gene encoding the protein kinase A type I-beta regulatory subunit (PRKAR1B). The pathogenicity of the mutation is supported by segregation in the family, absence in variant databases, and the specific accumulation of PRKAR1B in the inclusions in our cases associated with a specific biochemical pattern of PRKAR1B. Screening of PRKAR1B in 138 patients with Parkinson's disease and 56 patients with frontotemporal dementia did not identify additional novel pathogenic mutations. Our findings link a pathogenic PRKAR1B mutation to a novel hereditary neurodegenerative disorder and suggest an altered protein kinase A function through a reduced binding of the regulatory subunit to the A-kinase anchoring protein and the catalytic subunit of protein kinase A, which might result in subcellular dislocalization of the catalytic subunit and hyperphosphorylation of intermediate filaments.
- Published
- 2014