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JOURNAL ARTICLE
Jianhai Chen, Yangying Jia, Jie Zhong, Kun Zhang, Hongzheng Dai, Guanglin He, Fuping Li, Li Zeng, Chuanzhu Fan, Huayan Xu
BACKGROUND: As one of the most common congenital abnormalities in male births, cryptorchidism has been found to have a polygenic aetiology according to previous studies of common variants. However, little is known about genetic predisposition of rare variants for cryptorchidism, since rare variants have larger effective size on diseases than common variants. METHODS: In this study, a cohort of 115 Chinese probands with cryptorchidism was analysed using whole-genome sequencing, alongside 19 parental controls and 2136 unaffected men...
April 15, 2024: Journal of Medical Genetics
#2
JOURNAL ARTICLE
Astrid Brull, Apurva Sarathy, Véronique Bolduc, Grace S Chen, Riley M McCarty, Carsten G Bönnemann
Collagen VI-related dystrophies (COL6-RDs) are a group of severe, congenital-onset muscular dystrophies for which there is no effective causative treatment. Dominant-negative mutations are common in COL6A1 , COL6A2 , and COL6A 3 genes, encoding the collagen α1, α2, and α3 (VI) chains. They act by incorporating into the hierarchical assembly of the three α (VI) chains and consequently produce a dysfunctional collagen VI extracellular matrix, while haploinsufficiency for any of the COL6 genes is not associated with disease...
June 11, 2024: Molecular Therapy. Nucleic Acids
#3
A Reghan Foley, Véronique Bolduc, Fady Guirguis, Sandra Donkervoort, Ying Hu, Rotem Orbach, Riley M McCarty, Apurva Sarathy, Gina Norato, Beryl B Cummings, Monkol Lek, Anna Sarkozy, Russell J Butterfield, Janbernd Kirschner, Andrés Nascimento, Daniel Natera-de Benito, Susana Quijano-Roy, Tanya Stojkovic, Luciano Merlini, Giacomo Comi, Monique Ryan, Denise McDonald, Pinki Munot, Grace Yoon, Edward Leung, Erika Finanger, Meganne E Leach, James Collins, Cuixia Tian, Payam Mohassel, Sarah B Neuhaus, Dimah Saade, Benjamin T Cocanougher, Mary-Lynn Chu, Mena Scavina, Carla Grosmann, Randal Richardson, Brian D Kossak, Sidney M Gospe, Vikram Bhise, Gita Taurina, Baiba Lace, Monica Troncoso, Mordechai Shohat, Adel Shalata, Sophelia H S Chan, Manu Jokela, Johanna Palmio, Göknur Haliloğlu, Cristina Jou, Corine Gartioux, Herimela Solomon-Degefa, Carolin D Freiburg, Alvise Schiavinato, Haiyan Zhou, Sara Aguti, Yoram Nevo, Ichizo Nishino, Cecilia Jimenez-Mallebrera, Shireen R Lamandé, Valérie Allamand, Francesca Gualandi, Alessandra Ferlini, Daniel G MacArthur, Steve D Wilton, Raimund Wagener, Enrico Bertini, Francesco Muntoni, Carsten G Bönnemann
Collagen VI-related dystrophies (COL6-RDs) manifest with a spectrum of clinical phenotypes, ranging from Ullrich congenital muscular dystrophy (UCMD), presenting with prominent congenital symptoms and characterised by progressive muscle weakness, joint contractures and respiratory insufficiency, to Bethlem muscular dystrophy, with milder symptoms typically recognised later and at times resembling a limb girdle muscular dystrophy, and intermediate phenotypes falling between UCMD and Bethlem muscular dystrophy...
March 29, 2024: medRxiv
#4
Véronique Bolduc, Katherine Sizov, Astrid Brull, Eric Esposito, Grace S Chen, Prech Uapinyoying, Apurva Sarathy, Kory Johnson, Carsten G Bönnemann
The application of allele-specific gene editing tools can expand the therapeutic options for dominant genetic conditions, either via gene correction or via allelic gene inactivation in situations where haploinsufficiency is tolerated. Here, we used allele-targeted CRISPR/Cas9 guide RNAs (gRNAs) to introduce inactivating frameshifting indels at a single nucleotide variant in the COL6A1 gene (c.868G>A; G290R), a variant that acts as dominant negative and that is associated with a severe form of congenital muscular dystrophy...
March 22, 2024: bioRxiv
#5
REVIEW
Jorge Román Corona-Rivera, Iván Martínez-Duncker, Eva Morava, Wasantha Ranatunga, Roberta Salinas-Marin, Ana María González-Jaimes, Katia Alejandra Castillo-Reyes, Christian Peña-Padilla, Lucina Bobadilla-Morales, Alfredo Corona-Rivera, Mireya Orozco-Vela, Sinhue Alejandro Brukman-Jiménez
The trafficking protein particle (TRAPP) complex is a multisubunit protein complex that functions as a tethering factor involved in intracellular trafficking. TRAPPC11, a crucial subunit of this complex, is associated with pathogenic variants that cause a spectrum of disease, which can range from a limb girdle muscular dystrophy (LGMD) to developmental disability with muscle disease, movement disorder and global developmental delay (GDD)/intellectual disability (ID), or even a congenital muscular dystrophy (CMD)...
March 28, 2024: Molecular Genetics and Metabolism
#6
JOURNAL ARTICLE
Annamaria Manzolillo, Lennart Gresing, Christian A Hübner, Patricia Franzka
Inositol polyphosphate 5-phosphatase K (INPP5K), also known as SKIP (skeletal muscle and kidney-enriched inositol phosphatase), is a cytoplasmic enzyme with 5-phosphatase activity toward phosphoinositides (PIs). Mutations in INPP5K are associated with autosomal recessive congenital muscular dystrophy with cataracts and intellectual disability (MDCCAID). Notably, muscular dystrophy is characterized by the hypoglycosylation of dystroglycan. Thus, far, the underlying mechanisms are only partially understood. In this study, we show that INPP5K expression increases during brain development...
2024: Frontiers in Molecular Neuroscience
#7
JOURNAL ARTICLE
Emily C Storey, Ian Holt, Sharon Brown, Silvia Synowsky, Sally Shirran, Heidi R Fuller
LMNA-related congenital muscular dystrophy (L-CMD) is caused by mutations in the LMNA gene, encoding lamin A/C. To further understand the molecular mechanisms of L-CMD, proteomic profiling using DIA mass spectrometry was conducted on immortalized myoblasts and myotubes from controls and L-CMD donors each harbouring a different LMNA mutation (R249W, del.32 K and L380S). Compared to controls, 124 and 228 differentially abundant proteins were detected in L-CMD myoblasts and myotubes, respectively, and were associated with enriched canonical pathways including synaptogenesis and necroptosis in myoblasts, and Huntington's disease and insulin secretion in myotubes...
March 15, 2024: Neuromuscular Disorders: NMD
#8
JOURNAL ARTICLE
Rasha El Sherif, Yoshihiko Saito, Tomonari Awaya, Satoru Noguchi, Ichizo Nishino
OBJECTIVES: Collagen VI-related myopathy spans a clinical continuum from severe Ullrich congenital muscular dystrophy to milder Bethlem myopathy, caused by genetic variants in COL6A1 , COL6A2 , and COL6A3 genes. Our objective was to report a newly identified patient with the pathogenic variants restricted to a polyadenylation signal in the 3'-untranslated region, which have not been reported in hereditary muscle disease. METHODS: We performed clinicopathologic diagnosis and analysis using whole-genome and RNA sequencing...
April 2024: Neurology. Genetics
#9
JOURNAL ARTICLE
Gurnoor Lail, Victoria M Siu, Andrew Leung
We describe the case of a 19-month-old girl presenting with gross motor delays, hypotonia, diminished deep tendon reflexes, hyperCKaemia, extensive white matter changes on MRI brain, and electromyography studies consistent with myopathy. The differential diagnosis for infantile-onset hypotonia and muscle weakness is broad. It includes numerous subtypes of genetic disorders, including congenital muscular dystrophies, congenital myopathies, congenital myasthenic syndromes, spinal muscular atrophy, single-gene genetic syndromes, and inborn errors of metabolism...
April 9, 2024: Neurology
#10
JOURNAL ARTICLE
Vittoria Cenni, Patrizia Sabatelli, Alberto Di Martino, Luciano Merlini, Manuela Antoniel, Stefano Squarzoni, Simona Neri, Spartaco Santi, Samuele Metti, Paolo Bonaldo, Cesare Faldini
The pericellular matrix (PCM) is a specialized extracellular matrix that surrounds cells. Interactions with the PCM enable the cells to sense and respond to mechanical signals, triggering a proper adaptive response. Collagen VI is a component of muscle and tendon PCM. Mutations in collagen VI genes cause a distinctive group of inherited skeletal muscle diseases, and Ullrich congenital muscular dystrophy (UCMD) is the most severe form. In addition to muscle weakness, UCMD patients show structural and functional changes of the tendon PCM...
February 22, 2024: Cells
#11
JOURNAL ARTICLE
G Diane Shelton, James R Mickelson, Steven G Friedenberg, Jonah N Cullen, Karina Graham, Missy C Carpentier, Ling T Guo, Katie M Minor
(1) Background: Muscle hypertrophy, swallowing disorders, and gait abnormalities are clinical signs common to many muscle diseases, including muscular dystrophies, non-dystrophic myotonias, genetic myopathies associated with deficiency of myostatin, and acquired inflammatory myopathies. Here, we investigated underlying causes of this triad of clinical signs in four young French bulldogs via muscle histopathology coupled with whole genome and Sanger sequencing. (2) Methods: Dogs were evaluated by veterinary clinical internists and neurologists, and biopsies were obtained for histopathological diagnosis...
February 25, 2024: Animals: An Open Access Journal From MDPI
#12
Ben Weisburd, Rakshya Sharma, Villem Pata, Tiia Reimand, Vijay S Ganesh, Christina Austin-Tse, Ikeoluwa Osei-Owusu, Emily O'Heir, Melanie O'Leary, Lynn Pais, Seth A Stafki, Audrey L Daugherty, Carsten G Bonnemann, Sandra Donkervoort, Goknur Haliloglu, Peter B Kang, Gianina Ravenscroft, Nigel Laing, Hamish S Scott, Ana Topf, Volker Straub, Sander Pajusalu, Katrin Ounap, Grace Tiao, Heidi L Rehm, Anne O'Donnell-Luria
Spinal muscular atrophy (SMA) is a genetic disorder that causes progressive degeneration of lower motor neurons and the subsequent loss of muscle function throughout the body. It is the second most common recessive disorder in individuals of European descent and is present in all populations. Accurate tools exist for diagnosing SMA from short read and long read genome sequencing data. However, there are no publicly available tools for GRCh38-aligned data from panel or exome sequencing assays which continue to be used as first line tests for neuromuscular disorders...
February 27, 2024: medRxiv
#13
JOURNAL ARTICLE
Sylvia Safwat, Kyle P Flannery, Ahmed A El Beheiry, Mohamed M Mokhtar, Ebtesam Abdalla, M Chiara Manzini
Congenital muscular dystrophies (CMDs) are a group of rare muscle disorders characterized by early onset hypotonia and motor developmental delay associated with brain malformations with or without eye anomalies in the most severe cases. In this study, we aimed to uncover the genetic basis of severe CMD in Egypt and to determine the efficacy of whole exome sequencing (WES)-based genetic diagnosis in this population. We recruited twelve individuals from eleven families with a clinical diagnosis of CMD with brain malformations that fell into two groups: seven patients with suspected dystroglycanopathy and five patients with suspected merosin-deficient CMD...
February 1, 2024: Neurogenetics
#14
JOURNAL ARTICLE
Brittany F Karas, Kristin R Terez, Shorbon Mowla, Namarata Battula, Kyle P Flannery, Brian M Gural, Grace Aboussleman, Numa Mubin, M Chiara Manzini
Biallelic mutations in Protein O-mannosyltransferase 1 (POMT1) are among the most common causes of a severe group of congenital muscular dystrophies (CMDs) known as dystroglycanopathies. POMT1 is a glycosyltransferase responsible for the attachment of a functional glycan mediating interactions between the transmembrane glycoprotein dystroglycan and its binding partners in the extracellular matrix (ECM). Disruptions in these cell-ECM interactions lead to multiple developmental defects causing brain and eye malformations in addition to CMD...
January 25, 2024: Human Molecular Genetics
#15
JOURNAL ARTICLE
Erika K Williams, Cristina Shea, Paloma Gonzalez-Perez
OBJECTIVES: The objective of this study was to expand the phenotypic spectrum of glutamine-fructose-6-phosphate transaminase 1 ( GFPT1 )-related congenital myasthenia syndrome (CMS). METHODS: A 61-year-old man with agenesis of the left pectoralis major muscle presented with progressive muscle weakness for a decade that transiently improved after exertion. RESULTS: His examination revealed proximal and distal muscle weakness in upper extremities and proximal muscle weakness in lower extremities...
December 2023: Neurology. Genetics
#16
Aysylu Murtazina, Artem Borovikov, Anna Kuchina, Olga Ovsova, Maria Bulakh, Alena Chukhrova, Svetlana Braslavskaya, Oksana Ryzhkova, Nikolay Skryabin, Sergey Kutsev, Elena Dadali
The HOXB1 gene encodes a homeobox transcription factor pivotal in the development of rhombomere 4. Biallelic pathogenic variants in this gene are associated with congenital facial paresis type 3 (HCFP3). Only seven single nucleotide variants have been reported in the literature to date. Here, we report a 27-year-old female with a unique presentation of HCFP3 with two novel compound-heterozygous missense variants: c.763C>G, p.(Arg255Gly), which arose de novo and an inherited c.781C>T, p.(Arg261Cys) variant...
December 21, 2023: International Journal of Molecular Sciences
#17
JOURNAL ARTICLE
Nessrine Mezzi, Anissa Zaouak, Rahma Mkaouar, Imen Kacem, Riadh Gouider, Samy Fenniche, Ridha Mrad, Sonia Abdelhak, Lilia Romdhane
Elevated rates of consanguinity and inbreeding are responsible for the high prevalence of recessively inherited diseases among inbred populations including Tunisia. In addition, the co-occurrence of two of these conditions, called also comorbidity, within the same individual or in members of the same family are often described in Tunisia which is challenging for diagnosis. The high throughput sequencing has improved the diagnosis of inherited diseases. We report here on a 32-year-old woman born to consanguineous parents...
January 3, 2024: Gene
#18
JOURNAL ARTICLE
Jennifer N Jahncke, Daniel S Miller, Milana Krush, Eric Schnell, Kevin M Wright
Dystroglycan (Dag1) is a transmembrane glycoprotein that links the extracellular matrix to the actin cytoskeleton. Mutations in Dag1 or the genes required for its glycosylation result in dystroglycanopathy, a type of congenital muscular dystrophy characterized by a wide range of phenotypes including muscle weakness, brain defects, and cognitive impairment. We investigated interneuron (IN) development, synaptic function, and associated seizure susceptibility in multiple mouse models that reflect the wide phenotypic range of dystroglycanopathy neuropathology...
January 5, 2024: ELife
#19
JOURNAL ARTICLE
Karlijn Bouman, Anne T M Dittrich, Jan T Groothuis, Baziel G M van Engelen, Heidi Zweers-van Essen, Anja de Baaij-Daalmeyer, Mirian C H Janssen, Corrie E Erasmus, Jos M T Draaisma, Nicol C Voermans
Fragility fractures are frequently reported in neuromuscular diseases and negatively influence functional prognosis, quality of life and survival. In LAMA2-related muscular dystrophy (LAMA2-MD) and SELENON(SEPN1)-related congenital myopathy (SELENON-RM) cross-sectional and prospective natural history studies on bone quality and fragility long bone fractures (LBFs) are lacking. We therefore aim to systematically assess bone quality and provide recommendations for clinical care. We performed a one-year prospective natural history study in 21 LAMA2-MD and 10 SELENON-RM patients including a standardized fracture history and bone quality assessment through dual energy Xray absorptiometry scan (DEXA-scan) and/or bone health index (BHI)...
December 2, 2023: Neuromuscular Disorders: NMD
#20
JOURNAL ARTICLE
Victor Morel, Frédérique Audic, Charlotte Tardy, Annie Verschueren, Shahram Attarian, Karine Nguyen, Emmanuelle Salort-Campana, Martin Krahn, Brigitte Chabrol, Svetlana Gorokhova
Collagen type VI-related dystrophies (COL6-RD) are rare diseases with a wide phenotypic spectrum ranging from severe Ullrich's congenital muscular dystrophy Ullrich congenital muscular dystrophy to much milder Bethlem myopathy Both dominant and recessive forms of COL6-RD are caused by pathogenic variants in three collagen VI genes ( COL6A1 , COL6A2 and COL6A3 ). The prognosis of these diseases is variable and difficult to predict during early disease stages, especially since the genotype-phenotype correlation is not always clear...
2023: Frontiers in Genetics
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