Read by QxMD icon Read

Limb girdle muscular dystrophy

Imene Dalichaouche, Yamina Sifi, Carinne Roudaut, Karima Sifi, Abdelmadjid Hamri, Leila Rouabah, Noureddine Abadi, Isabelle Richard
INTRODUCTION: We report the genetic analysis of a large series of 76 Algerian patients from 65 unrelated families that presented with early onset severe muscular dystrophy and a clinical phenotype resembling Limb-girdle muscular dystrophy type 2C (LGMD2C). METHODS: To define the genetic basis of the diseases in these families, we undertook a series of analysis of the γ-sarcoglycan (SGCG) and DMD genes. RESULTS: Fifteen families were shown to carry SGCG variants...
October 19, 2016: Muscle & Nerve
Jingzi Zhong, Tiantian Xu, Gang Chen, Haixia Liao, Jiapeng Zhang, Dan Lan
Introduction Duchenne and Becker muscular dystrophies (DMD and BMD) are X-linked myopathies caused by mutations of the dystrophin gene. Methods Multiplex ligation-dependent probe amplification (MLPA) combined with next-generation sequencing (NGS) of the exons of the dystrophin gene were performed in 92 suspected DMD/BMD patients. Patients with negative results were subjected to additional muscle diseases panel tests. Results DNA rearrangements were detected in 65(70.65%) patients using MLPA. The deletions primarily clustered at exons 45-55, followed by exons 2-19...
October 17, 2016: Muscle & Nerve
Alessandra Ruggieri, Simona Saredi, Simona Zanotti, Maria Barbara Pasanisi, Lorenzo Maggi, Marina Mora
Mutations in the DNAJB6 gene have been associated with the autosomal dominant limb girdle muscular dystrophy type 1D (LGMD1D), a disorder characterized by abnormal protein aggregates and rimmed vacuoles in muscle fibers. DNAJB6 is a ubiquitously expressed Hsp40 co-chaperone characterized by a J domain that specifies Hsp70 functions in the cellular environment. DNAJB6 is also a potent inhibitor of expanded polyglutamine (polyQ) aggregation preventing aggregate toxicity in cells. In DNAJB6-mutated patients this anti-aggregation property is significantly reduced, albeit not completely lost...
2016: Frontiers in Molecular Biosciences
Y Rogozhina, S Mironovich, A Shestak, T Adyan, A Polyakov, D Podolyak, A Bakulina, S Dzemeshkevich, E Zaklyazminskaya
BACKGROUND: Most of mutations in the LMNA gene are unique and have been found in only a few unrelated families. The clinical interpretation of new genetic variants, especially beyond the coding area and canonical splice sites, is proving to be difficult and requires advanced investigation. METHODS: This study included patients with progressive cardiac conduction defects with neuromuscular involvement. The clinical evaluation included medical history and 24-h Holter monitoring...
October 4, 2016: Gene
Hemakumar M Reddy, Kyung-Ah Cho, Monkol Lek, Elicia Estrella, Elise Valkanas, Michael D Jones, Satomi Mitsuhashi, Basil T Darras, Anthony A Amato, Hart Gw Lidov, Catherine A Brownstein, David M Margulies, Timothy W Yu, Mustafa A Salih, Louis M Kunkel, Daniel G MacArthur, Peter B Kang
The current study characterizes a cohort of limb-girdle muscular dystrophy (LGMD) in the United States using whole-exome sequencing. Fifty-five families affected by LGMD were recruited using an institutionally approved protocol. Exome sequencing was performed on probands and selected parental samples. Pathogenic mutations and cosegregation patterns were confirmed by Sanger sequencing. Twenty-two families (40%) had novel and previously reported pathogenic mutations, primarily in LGMD genes, and also in genes for Duchenne muscular dystrophy, facioscapulohumeral muscular dystrophy, congenital myopathy, myofibrillar myopathy, inclusion body myopathy and Pompe disease...
October 6, 2016: Journal of Human Genetics
Katrin Koehler, Miroslav P Milev, Keshika Prematilake, Felix Reschke, Susann Kutzner, Ramona Jühlen, Dana Landgraf, Eda Utine, Filiz Hazan, Gulden Diniz, Markus Schuelke, Angela Huebner, Michael Sacher
BACKGROUND: Triple A syndrome (MIM #231550) is associated with mutations in the AAAS gene. However, about 30% of patients with triple A syndrome symptoms but an unresolved diagnosis do not harbour mutations in AAAS. OBJECTIVE: Search for novel genetic defects in families with a triple A-like phenotype in whom AAAS mutations are not detected. METHODS: Genome-wide linkage analysis, whole-exome sequencing and functional analyses were used to discover and verify a novel genetic defect in two families with achalasia, alacrima, myopathy and further symptoms...
October 5, 2016: Journal of Medical Genetics
Dorota Monies, Hindi N Alhindi, Mohamed A Almuhaizea, Mohamed Abouelhoda, Anas M Alazami, Ewa Goljan, Banan Alyounes, Dyala Jaroudi, Abdulelah AlIssa, Khalid Alabdulrahman, Shazia Subhani, Mohamed El-Kalioby, Tariq Faquih, Salma M Wakil, Nada A Altassan, Brian F Meyer, Saeed Bohlega
BACKGROUND: Fifty random genetically unstudied families (limb-girdle muscular dystrophy (LGMD)/myopathy) were screened with a gene panel incorporating 759 OMIM genes associated with neurological disorders. Average coverage of the CDS and 10 bp flanking regions of genes was 99 %. All families were referred to the Neurosciences Clinic of King Faisal Specialist Hospital and Research Centre, Saudi Arabia. Patients presented with muscle weakness affecting the pelvic and shoulder girdle. Muscle biopsy in all cases showed dystrophic or myopathic changes...
September 27, 2016: Human Genomics
Volker Middel, Lu Zhou, Masanari Takamiya, Tanja Beil, Maryam Shahid, Urmas Roostalu, Clemens Grabher, Sepand Rastegar, Markus Reischl, Gerd Ulrich Nienhaus, Uwe Strähle
Failure to repair the sarcolemma leads to muscle cell death, depletion of stem cells and myopathy. Hence, membrane lesions are instantly sealed by a repair patch consisting of lipids and proteins. It has remained elusive how this patch is removed to restore cell membrane integrity. Here we examine sarcolemmal repair in live zebrafish embryos by real-time imaging. Macrophages remove the patch. Phosphatidylserine (PS), an 'eat-me' signal for macrophages, is rapidly sorted from adjacent sarcolemma to the repair patch in a Dysferlin (Dysf) dependent process in zebrafish and human cells...
September 19, 2016: Nature Communications
Joseph W Maricelli, Qi L Lu, David C Lin, Buel D Rodgers
Limb-girdle muscular dystrophy type 2i (LGMD2i) affects thousands of lives with shortened life expectancy mainly due to cardiac and respiratory problems and difficulty with ambulation significantly compromising quality of life. Limited studies have noted impaired gait in patients and animal models of different muscular dystrophies, but not in animal models of LGMD2i. Our goal, therefore, was to quantify gait metrics in the fukutin-related protein P448L mutant (P448L) mouse, a recently developed model for LGMD2i...
2016: PloS One
Elizabeth Harris, Catherine L Bladen, Anna Mayhew, Meredith James, Karen Bettinson, Ursula Moore, Fiona E Smith, Laura Rufibach, Avital Cnaan, Diana X Bharucha-Goebel, Andrew M Blamire, Elena Bravver, Pierre G Carlier, John W Day, Jordi Díaz-Manera, Michelle Eagle, Ulrike Grieben, Matthew Harms, Kristi J Jones, Hanns Lochmüller, Jerry R Mendell, Madoka Mori-Yoshimura, Carmen Paradas, Elena Pegoraro, Alan Pestronk, Emmanuelle Salort-Campana, Olivia Schreiber-Katz, Claudio Semplicini, Simone Spuler, Tanya Stojkovic, Volker Straub, Shin'ich Takeda, Carolina Tesi Rocha, M C Walter, Kate Bushby
OBJECTIVE: To describe the baseline clinical and functional characteristics of an international cohort of 193 patients with dysferlinopathy. METHODS: The Clinical Outcome Study for dysferlinopathy (COS) is an international multicenter study of this disease, evaluating patients with genetically confirmed dysferlinopathy over 3 years. We present a cross-sectional analysis of 193 patients derived from their baseline clinical and functional assessments. RESULTS: There is a high degree of variability in disease onset, pattern of weakness, and rate of progression...
August 2016: Neurology. Genetics
Xinghua Luan, Wotu Tian, Li Cao
OBJECTIVES: To describe the clinical and genetic features of a Chinese congenital myasthenic syndromes (CMS) patient with two novel missense mutations in muscle specific receptor tyrosine kinase (MUSK) gene and review 15 MUSK-related CMS patients from 8 countries. METHODS: The patient was a 30-year-old man with chronic progressively proximal limb weakness for 22 years and diagnosed as muscular dystrophy before. Serum creatine kinase (CK) was normal. Repetitive nerve stimulation (RNS) test showed decrements at low rate stimulation...
November 2016: Clinical Neurology and Neurosurgery
Agnieszka Madej-Pilarczyk, Adam Niezgoda, Magdalena Janus, Romuald Wojnicz, Michał Marchel, Anna Fidziańska, Stefan Grajek, Irena Hausmanowa-Petrusewicz
Laminopathies, a group of heterogeneous disorders associated with lamin A/C gene (LMNA) mutations, encompass a wide spectrum of clinical phenotypes, which may present as separate disease or as overlapping syndromes. We describe a 35-year-old female in whom a novel sporadic heterozygous mutation c.1001_1003delGCC (p.Ser334del) of the LMNA gene was found. The patient presented with overlapping syndrome of heart failure secondary to dilated cardiomyopathy, limb-girdle dystrophy and partial lipodystrophy. Endomyocardial biopsy revealed strong up-regulation of HLA classes I and II antigens on microvessels and induction of the class I antigens on cardiomyocytes...
September 1, 2016: Journal of Applied Genetics
Paul J Thomas, Rui Xu, Paul T Martin
Overexpression of B4GALNT2 (previously GALGT2) inhibits the development of muscle pathology in mouse models of Duchenne muscular dystrophy, congenital muscular dystrophy 1A, and limb girdle muscular dystrophy 2D. In these models, muscle GALGT2 overexpression induces the glycosylation of α dystroglycan with the cytotoxic T cell glycan and increases the overexpression of dystrophin and laminin α2 surrogates known to inhibit disease. Here, we show that GALGT2 gene therapy significantly reduces muscle pathology in FKRP P448Lneo(-) mice, a model for limb girdle muscular dystrophy 2I...
September 2016: American Journal of Pathology
M Aguennouz, C Lo Giudice, N Licata, C Rodolico, O Musumeci, M Fanin, A Migliorato, M Ragusa, V Macaione, R M Di Giorgio, C Angelini, A Toscano
miRNA expression profile and predicted pathways involved in selected limb-girdle muscular dystrophy (LGMD)2A/2B patients were investigated. A total of 187 miRNAs were dysregulated in all patients, with six miRNAs showing opposite regulation in LGMD2A versus LGMD2B patients. Silico analysis evidence: (1) a cluster of the dysregulated miRNAs resulted primarily involved in inflammation and calcium metabolism, and (2) two genes predicted as controlled by calcium-assigned miRNAs (Vitamin D Receptor gene and Guanine Nucleotide Binding protein beta polypeptide 1gene) showed an evident upregulation in LGMD2B patients, in accordance with miRNA levels...
August 2016: Cell Biochemistry and Function
Matthew P Wicklund
The limb-girdle muscular dystrophies (LGMDs) encompass a collection of genetic muscle diseases with proximal-predominant weakness of the limbs. Thirty-two of these disorders are named via the common nomenclature, including 8 autosomal-dominant (LGMD1A-H) and 24 autosomal-recessive (LGMD2A-X) disorders.(1) In addition, numerous other genetic muscle diseases, including Bethlem myopathy, dystrophinopathies, ryanodine receptor-associated myopathies, and many more, may clinically present with similar proximal-predominant weakness...
August 2016: Neurology. Genetics
Adrian J Waite, Francesca A Carlisle, Yiumo Michael Chan, Derek J Blake
BACKGROUND: Myoclonus-dystonia is a neurogenic movement disorder caused by mutations in the gene encoding ɛ-sarcoglycan. By contrast, mutations in the α-, β-, γ-, and δ-sarcoglycan genes cause limb girdle muscular dystrophies. The sarcoglycans are part of the dystrophin-associated protein complex in muscle that is disrupted in several types of muscular dystrophy. Intriguingly, patients with myoclonus-dystonia have no muscle pathology; conversely, limb-girdle muscular dystrophy patients have not been reported to have dystonia-associated features...
August 18, 2016: Movement Disorders: Official Journal of the Movement Disorder Society
Marina Fanin, Corrado Angelini
Dysferlin-deficient limb girdle muscular dystrophy type 2B, distal Miyoshi myopathy, and other less frequent phenotypes are a group of recessive disorders called dysferlinopathies. They are characterized by wide clinical heterogeneity. To diagnose dysferlinopathy, a clinical neuromuscular workup, including electrophysiological and muscle imaging investigations, is essential to support subsequent laboratory testing. Increased serum creatine kinase levels, distal or proximal muscle weakness, and myalgia with onset in the second or third decades are the main clinical features of the disease...
August 8, 2016: Muscle & Nerve
Madoka Mori-Yoshimura, Kazuhiko Segawa, Narihiro Minami, Yasushi Oya, Hirohumi Komaki, Ikuya Nonaka, Ichizo Nishino, Miho Murata
INTRODUCTION: Little is known about the frequency of cardiopulmonary failure in limb-girdle muscular dystrophy type 2A (calpainopathy) patients, although some studies have reported severe cardiomyopathy or respiratory failure. METHODS: To clarify the frequency of cardiopulmonary dysfunction in this patient population, we retrospectively reviewed the respiratory and cardiac function of 43 patients with calpainopathy. RESULTS: Nine of the 43 patients had forced vital capacity (FVC) <80%, and 3 used non-invasive positive pressure ventilation...
August 8, 2016: Muscle & Nerve
John Vissing
PURPOSE OF REVIEW: The aim of the study was to describe the clinical spectrum of limb girdle muscular dystrophies (LGMDs), the pitfalls of the current classification system for LGMDs, and emerging therapies for these conditions. RECENT FINDINGS: Close to half of all LGMD subtypes have been discovered within the last 6 years of the 21-year-period in which the current classification system for LGMD has existed. The number of letters for annotation of new recessive LGMD conditions is exhausted, and multiple already classified LGMDs do not strictly fulfill diagnostic criteria for LGMD or are registered in other classification systems for muscle disease...
October 2016: Current Opinion in Neurology
Nicoline Løkken, Gitte Hedermann, Carsten Thomsen, John Vissing
We investigated whether a linear relationship between muscle strength and cross-sectional area (CSA) is preserved in calf muscles of patients with Becker muscular dystrophy (BMD, n = 14) and limb-girdle type 2I muscular dystrophy (LGMD2I, n = 11), before and after correcting for muscle fat infiltration. The Dixon magnetic resonance imaging technique was used to quantify fat and calculate a fat-free contractile CSA. Strength was assessed by dynamometry. Muscle strength/CSA relationships were significantly lower in patients versus controls...
September 2016: Annals of Neurology
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"