10 results on '"Bushby K"'
Search Results
2. Cardiac and respiratory failure in limb-girdle muscular dystrophy 2I.
- Author
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Poppe M, Bourke J, Eagle M, Frosk P, Wrogemann K, Greenberg C, Muntoni F, Voit T, Straub V, Hilton-Jones D, Shirodaria C, and Bushby K
- Published
- 2004
3. Infantile spinal muscular atrophy with respiratory distress type 1 (SMARD1)
- Author
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Grohmann K, Varon R, Stolz P, Schuelke M, Janetzki C, Bertini E, Bushby K, Muntoni F, Ouvrier R, Van Maldergem L, Goemans NML, Lochmüller H, Eichholz S, Adams C, Bosch F, Grattan-Smith P, Navarro C, Neitzel H, Polster T, and Topaloglu H
- Published
- 2003
4. GGPS1 Mutations Cause Muscular Dystrophy/Hearing Loss/Ovarian Insufficiency Syndrome.
- Author
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Foley AR, Zou Y, Dunford JE, Rooney J, Chandra G, Xiong H, Straub V, Voit T, Romero N, Donkervoort S, Hu Y, Markello T, Horn A, Qebibo L, Dastgir J, Meilleur KG, Finkel RS, Fan Y, Mamchaoui K, Duguez S, Nelson I, Laporte J, Santi M, Malfatti E, Maisonobe T, Touraine P, Hirano M, Hughes I, Bushby K, Oppermann U, Böhm J, Jaiswal JK, Stojkovic T, and Bönnemann CG
- Subjects
- Adolescent, Adult, Animals, Female, Gene Knock-In Techniques methods, Hearing Loss diagnostic imaging, Humans, Mice, Mice, Transgenic, Middle Aged, Muscular Dystrophies diagnostic imaging, Pedigree, Primary Ovarian Insufficiency diagnostic imaging, Protein Structure, Secondary, Sequence Analysis, DNA methods, Exome Sequencing methods, Young Adult, Dimethylallyltranstransferase genetics, Farnesyltranstransferase genetics, Geranyltranstransferase genetics, Hearing Loss genetics, Muscular Dystrophies genetics, Mutation genetics, Primary Ovarian Insufficiency genetics
- Abstract
Objective: A hitherto undescribed phenotype of early onset muscular dystrophy associated with sensorineural hearing loss and primary ovarian insufficiency was initially identified in 2 siblings and in subsequent patients with a similar constellation of findings. The goal of this study was to understand the genetic and molecular etiology of this condition., Methods: We applied whole exome sequencing (WES) superimposed on shared haplotype regions to identify the initial biallelic variants in GGPS1 followed by GGPS1 Sanger sequencing or WES in 5 additional families with the same phenotype. Molecular modeling, biochemical analysis, laser membrane injury assay, and the generation of a Y259C knock-in mouse were done., Results: A total of 11 patients in 6 families carrying 5 different biallelic pathogenic variants in specific domains of GGPS1 were identified. GGPS1 encodes geranylgeranyl diphosphate synthase in the mevalonate/isoprenoid pathway, which catalyzes the synthesis of geranylgeranyl pyrophosphate, the lipid precursor of geranylgeranylated proteins including small guanosine triphosphatases. In addition to proximal weakness, all but one patient presented with congenital sensorineural hearing loss, and all postpubertal females had primary ovarian insufficiency. Muscle histology was dystrophic, with ultrastructural evidence of autophagic material and large mitochondria in the most severe cases. There was delayed membrane healing after laser injury in patient-derived myogenic cells, and a knock-in mouse of one of the mutations (Y259C) resulted in prenatal lethality., Interpretation: The identification of specific GGPS1 mutations defines the cause of a unique form of muscular dystrophy with hearing loss and ovarian insufficiency and points to a novel pathway for this clinical constellation. ANN NEUROL 2020;88:332-347., (© 2020 The Authors. Annals of Neurology published by Wiley Periodicals, Inc. on behalf of American Neurological Association.)
- Published
- 2020
- Full Text
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5. Congenital Titinopathy: Comprehensive characterization and pathogenic insights.
- Author
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Oates EC, Jones KJ, Donkervoort S, Charlton A, Brammah S, Smith JE 3rd, Ware JS, Yau KS, Swanson LC, Whiffin N, Peduto AJ, Bournazos A, Waddell LB, Farrar MA, Sampaio HA, Teoh HL, Lamont PJ, Mowat D, Fitzsimons RB, Corbett AJ, Ryan MM, O'Grady GL, Sandaradura SA, Ghaoui R, Joshi H, Marshall JL, Nolan MA, Kaur S, Punetha J, Töpf A, Harris E, Bakshi M, Genetti CA, Marttila M, Werlauff U, Streichenberger N, Pestronk A, Mazanti I, Pinner JR, Vuillerot C, Grosmann C, Camacho A, Mohassel P, Leach ME, Foley AR, Bharucha-Goebel D, Collins J, Connolly AM, Gilbreath HR, Iannaccone ST, Castro D, Cummings BB, Webster RI, Lazaro L, Vissing J, Coppens S, Deconinck N, Luk HM, Thomas NH, Foulds NC, Illingworth MA, Ellard S, McLean CA, Phadke R, Ravenscroft G, Witting N, Hackman P, Richard I, Cooper ST, Kamsteeg EJ, Hoffman EP, Bushby K, Straub V, Udd B, Ferreiro A, North KN, Clarke NF, Lek M, Beggs AH, Bönnemann CG, MacArthur DG, Granzier H, Davis MR, and Laing NG
- Subjects
- Female, Humans, Male, Mutation genetics, Phenotype, Protein Isoforms genetics, Cardiomyopathy, Dilated congenital, Connectin genetics, Muscle Proteins genetics, Muscle, Skeletal pathology
- Abstract
Objective: Comprehensive clinical characterization of congenital titinopathy to facilitate diagnosis and management of this important emerging disorder., Methods: Using massively parallel sequencing we identified 30 patients from 27 families with 2 pathogenic nonsense, frameshift and/or splice site TTN mutations in trans. We then undertook a detailed analysis of the clinical, histopathological and imaging features of these patients., Results: All patients had prenatal or early onset hypotonia and/or congenital contractures. None had ophthalmoplegia. Scoliosis and respiratory insufficiency typically developed early and progressed rapidly, whereas limb weakness was often slowly progressive, and usually did not prevent independent walking. Cardiac involvement was present in 46% of patients. Relatives of 2 patients had dilated cardiomyopathy. Creatine kinase levels were normal to moderately elevated. Increased fiber size variation, internalized nuclei and cores were common histopathological abnormalities. Cap-like regions, whorled or ring fibers, and mitochondrial accumulations were also observed. Muscle magnetic resonance imaging showed gluteal, hamstring and calf muscle involvement. Western blot analysis showed a near-normal sized titin protein in all samples. The presence of 2 mutations predicted to impact both N2BA and N2B cardiac isoforms appeared to be associated with greatest risk of cardiac involvement. One-third of patients had 1 mutation predicted to impact exons present in fetal skeletal muscle, but not included within the mature skeletal muscle isoform transcript. This strongly suggests developmental isoforms are involved in the pathogenesis of this congenital/early onset disorder., Interpretation: This detailed clinical reference dataset will greatly facilitate diagnostic confirmation and management of patients, and has provided important insights into disease pathogenesis. Ann Neurol 2018;83:1105-1124., (© 2018 American Neurological Association.)
- Published
- 2018
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- View/download PDF
6. Brain involvement in muscular dystrophies with defective dystroglycan glycosylation.
- Author
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Clement E, Mercuri E, Godfrey C, Smith J, Robb S, Kinali M, Straub V, Bushby K, Manzur A, Talim B, Cowan F, Quinlivan R, Klein A, Longman C, McWilliam R, Topaloglu H, Mein R, Abbs S, North K, Barkovich AJ, Rutherford M, and Muntoni F
- Subjects
- Adolescent, Brain metabolism, Child, Child, Preschool, Genetic Predisposition to Disease genetics, Glycosylation, Humans, Infant, Infant, Newborn, Magnetic Resonance Imaging, Mannosyltransferases genetics, Membrane Proteins genetics, Muscular Dystrophies metabolism, Mutation genetics, N-Acetylglucosaminyltransferases genetics, Nervous System Malformations metabolism, Phenotype, Brain abnormalities, Dystroglycans metabolism, Muscular Dystrophies complications, Muscular Dystrophies genetics, Nervous System Malformations diagnosis, Nervous System Malformations genetics
- Abstract
Objective: To assess the range and severity of brain involvement, as assessed by magnetic resonance imaging, in 27 patients with mutations in POMT1 (4), POMT2 (9), POMGnT1 (7), Fukutin (4), or LARGE (3), responsible for muscular dystrophies with abnormal glycosylation of dystroglycan (dystroglycanopathies)., Methods: Blinded review of magnetic resonance imaging brain scans from 27 patients with mutations in 1 of these 5 genes., Results: Brain magnetic resonance images were normal in 3 of 27 patients; in another 5, only nonspecific abnormalities (ventricular dilatation, periventricular white matter abnormalities, or both) were seen. The remaining 19 patients had a spectrum of structural defects, ranging from complete lissencephaly in patients with Walker-Warburg syndrome to isolated cerebellar involvement. Cerebellar cysts and/or dysplasia and hypoplasia were the predominant features in four patients. Polymicrogyria (11/27) was more severe in the frontoparietal regions in 6, and had an occipitofrontal gradient in 2. Pontine clefts, with an unusual appearance to the corticospinal tracts, were seen in five patients with a muscle-eye-brain-like phenotype, three patients with POMGnT1, one with LARGE, and one with POMT2 mutations. Prominent cerebellar cysts were always seen with POMGnT1 mutations, but rarely seen in POMT1 and POMT2. Brainstem and pontine abnormalities were common in patients with POMT2, POMGnT1, and LARGE mutations., Interpretation: Our results expand the spectrum of brain involvement associated with mutations in LARGE, POMGnT1, POMT1, and POMT2. Pontine clefts were visible in some dystroglycanopathy patients. Infratentorial structures were often affected in isolation, highlighting their susceptibility to involvement in these conditions.
- Published
- 2008
- Full Text
- View/download PDF
7. A phase I/IItrial of MYO-029 in adult subjects with muscular dystrophy.
- Author
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Wagner KR, Fleckenstein JL, Amato AA, Barohn RJ, Bushby K, Escolar DM, Flanigan KM, Pestronk A, Tawil R, Wolfe GI, Eagle M, Florence JM, King WM, Pandya S, Straub V, Juneau P, Meyers K, Csimma C, Araujo T, Allen R, Parsons SA, Wozney JM, Lavallie ER, and Mendell JR
- Subjects
- Adult, Cohort Studies, Comorbidity, Double-Blind Method, Female, Humans, Incidence, Internationality, Male, Placebo Effect, Risk Factors, Treatment Outcome, Antibodies therapeutic use, Drug Eruptions epidemiology, Muscular Dystrophies drug therapy, Muscular Dystrophies epidemiology, Risk Assessment methods
- Abstract
Objective: Myostatin is an endogenous negative regulator of muscle growth and a novel target for muscle diseases. We conducted a safety trial of a neutralizing antibody to myostatin, MYO-029, in adult muscular dystrophies (Becker muscular dystrophy, facioscapulohumeral dystrophy, and limb-girdle muscular dystrophy)., Methods: This double-blind, placebo-controlled, multinational, randomized study included 116 subjects divided into sequential dose-escalation cohorts, each receiving MYO-029 or placebo (Cohort 1 at 1 mg/kg; Cohort 2 at 3 mg/kg; Cohort 3 at 10 mg/kg; Cohort 4 at 30 mg/kg). Safety and adverse events were assessed by reported signs and symptoms, as well as by physical examinations, laboratory results, echocardiograms, electrocardiograms, and in subjects with facioscapulohumeral dystrophy, funduscopic and audiometry examinations. Biological activity of MYO-029 was assessed through manual muscle testing, quantitative muscle testing, timed function tests, subject-reported outcomes, magnetic resonance imaging studies, dual-energy radiographic absorptiometry studies, and muscle biopsy., Results: MYO-029 had good safety and tolerability with the exception of cutaneous hypersensitivity at the 10 and 30 mg/kg doses. There were no improvements noted in exploratory end points of muscle strength or function, but the study was not powered to look for efficacy. Importantly, bioactivity of MYO-029 was supported by a trend in a limited number of subjects toward increased muscle size using dual-energy radiographic absorptiometry and muscle histology., Interpretation: This trial supports the hypothesis that systemic administration of myostatin inhibitors provides an adequate safety margin for clinical studies. Further evaluation of more potent myostatin inhibitors for stimulating muscle growth in muscular dystrophy should be considered.
- Published
- 2008
- Full Text
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8. Dysferlin-deficient muscular dystrophy features amyloidosis.
- Author
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Spuler S, Carl M, Zabojszcza J, Straub V, Bushby K, Moore SA, Bähring S, Wenzel K, Vinkemeier U, and Rocken C
- Subjects
- Adult, Aged, Amino Acid Sequence, Amino Acid Substitution genetics, Amyloidosis diagnosis, Dysferlin, Female, Humans, Male, Middle Aged, Molecular Sequence Data, Muscular Dystrophies, Limb-Girdle diagnosis, Protein Structure, Tertiary genetics, Amyloidosis genetics, Amyloidosis metabolism, Membrane Proteins deficiency, Membrane Proteins genetics, Muscle Proteins deficiency, Muscle Proteins genetics, Muscular Dystrophies, Limb-Girdle genetics, Muscular Dystrophies, Limb-Girdle metabolism
- Abstract
Objective: Dysferlin (DYSF) gene mutations cause limb girdle muscular dystrophy type 2B and Miyoshi's myopathy. The consequences of DYSF mutations on protein structure are poorly understood., Methods: The gene encoding dysferlin was sequenced in patients with suspected dysferlin-deficient muscular dystrophy. Muscle biopsy specimens were analyzed by histochemistry, immunohistochemistry, and electron microscopy. Antibodies against N-terminal dysferlin-peptides were raised., Results: We found three families with muscular dystrophy caused by homozygous or compound heterozygous DYSF mutations featuring sarcolemmal and interstitial amyloid deposits. These mutations were all located in the N-terminal region of the protein. Dysferlin was a constituent of the amyloid deposits., Interpretation: Limb girdle muscular dystrophy type 2B is the first muscular dystrophy associated with amyloidosis. Molecular treatment strategies will necessarily have to consider the presence of amyloidogenesis.
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- 2008
- Full Text
- View/download PDF
9. Mapping of autosomal recessive chronic distal spinal muscular atrophy to chromosome 11q13.
- Author
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Viollet L, Barois A, Rebeiz JG, Rifai Z, Burlet P, Zarhrate M, Vial E, Dessainte M, Estournet B, Kleinknecht B, Pearn J, Adams RD, Urtizberea JA, Cros DP, Bushby K, Munnich A, and Lefebvre S
- Subjects
- Adult, Child, Chronic Disease, Cyclic AMP Response Element-Binding Protein, Female, Genetic Markers, Humans, Male, Microsatellite Repeats genetics, Nerve Tissue Proteins genetics, Pedigree, RNA-Binding Proteins, SMN Complex Proteins, Chromosome Mapping methods, Chromosomes, Human, Pair 11 genetics, Genes, Recessive, Muscular Atrophy, Spinal genetics
- Abstract
Distal spinal muscular atrophy is a heterogeneous group of neuromuscular disorders caused by progressive anterior horn cell degeneration and characterized by progressive motor weakness and muscular atrophy, predominantly in the distal parts of the limbs. Here we report on chronic autosomal recessive distal spinal muscular atrophy in a large, inbred family with onset at various ages. Because this condition had some of the same clinical features as spinal muscular atrophy with respiratory distress, we tested the disease gene for linkage to chromosome 11q and mapped the disease locus to chromosome 11q13 in the genetic interval that included the spinal muscular atrophy with respiratory distress gene (D11S1889-D11S1321, Z(max) = 4.59 at theta = 0 at locus D11S4136). The sequencing of IGHMBP2, the human homologue of the mouse neuromuscular degeneration gene (nmd) that accounts for spinal muscular atrophy with respiratory distress, failed to detect any mutation in our chronic distal spinal muscular atrophy patients, suggesting that spinal muscular atrophy with respiratory distress and chronic distal spinal muscular atrophy are caused by distinct genes located in the same chromosomal region. In addition, the high intrafamilial variability in age at onset raises the question of whether nonallelic modifying genes could be involved in chronic distal spinal muscular atrophy.
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- 2002
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10. A novel autosomal dominant distal myopathy with early respiratory failure: clinico-pathologic characteristics and exclusion of linkage to candidate genetic loci.
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Chinnery PF, Johnson MA, Walls TJ, Gibson GJ, Fawcett PR, Jamieson S, Fulthorpe JJ, Cullen M, Hudgson P, and Bushby KM
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- Adult, Age of Onset, Aged, Female, Genetic Linkage, Humans, Male, Middle Aged, Muscles pathology, Muscular Dystrophies pathology, Pedigree, Time Factors, Muscular Dystrophies genetics, Muscular Dystrophies physiopathology, Respiratory Insufficiency genetics
- Abstract
We describe a novel autosomal dominant myopathy presenting in mid-adult life with tibialis anterior weakness. We carried out a detailed clinical assessment of 24 individuals spanning three generations, documenting pathologic features of the muscles in 7 of the 11 affected individuals, including an autopsy study on one case. The second generation of affected individuals presented at an earlier age, and the disease progressed more rapidly than in the first generation. Lung function tests revealed progressive global respiratory muscle weakness detectable from the time of presentation, with preferential diaphragmatic involvement in some cases. Hip girdle and shoulder girdle weakness appeared later in the disease course. We observed a striking correlation between the clinical and pathological features. Clinically unaffected muscles had minimal pathologic change. Fiber splitting, eosinophilic inclusions, and vacuoles with basophilic rims were seen in moderately affected muscles, and fat and fibrous connective tissue replaced muscle fibers in the severely involved muscles. The inclusions were Congophilic and reacted with antibodies to desmin, beta-amyloid, and phosphorylated tau protein. The disease was not linked to any of the known loci associated with distal myopathies, confirming that the disorder in this family is both genetically and phenotypically distinct.
- Published
- 2001
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