Article
Genetics & Heredity
Erika D'haenens, Sarah Vergult, Bjorn Menten, Annelies Dheedene, R. Frank Kooy, Bert Callewaert
Summary: Dystroglycanopathies are a group of congenital muscular dystrophies that show a wide range of phenotypes. They are not only clinically heterogeneous but also genetically heterogeneous. This study identifies a novel mutation in the B3GALNT2 gene associated with CMDs. Through a study on uniparental disomy, a unique case is discovered. Additionally, an overview of previously reported cases is provided, expanding the phenotypic spectrum.
Article
Biology
Hidehiko Okuma, Jeffrey M. Hord, Ishita Chandel, David Venzke, Mary E. Anderson, Ameya S. Walimbe, Soumya Joseph, Zeita Gastel, Yuji Hara, Fumiaki Saito, Kiichiro Matsumura, Kevin P. Campbell
Summary: Post-translational processing and O-glycosylation are critical for the function of Dystroglycan (DG) as a receptor for extracellular matrix (ECM) proteins. Our study demonstrates the importance of protein O-mannose kinase (POMK) and alpha-DGN in the synthesis of matriglycan by LARGE1.
Article
Cardiac & Cardiovascular Systems
Enrico Bugiardini, Andreia M. Nunes, Ariany Oliveira-Santos, Marisela Dagda, Tatiana M. Fontelonga, Pamela Barraza-Flores, Alan M. Pittman, Jasper M. Morrow, Matthew Parton, Henry Houlden, Perry M. Elliott, Petros Syrris, Roderick P. Maas, Mohammed M. Akhtar, Benno Kusters, Joost Raaphorst, Meyke Schouten, Erik-Jan Kamsteeg, Baziel van Engelen, Michael G. Hanna, Rahul Phadke, Luis R. Lopes, Emma Matthews, Dean J. Burkin
Summary: This study describes the pathological changes caused by ITGA7 mutations in skeletal and cardiac muscle. Patients exhibited cardiac dysfunction and respiratory insufficiency, and mouse experiments also showed abnormalities related to the heart and muscles. The results suggest a critical role for integrin alpha 7 beta 1 in cardiac function.
JOURNAL OF THE AMERICAN HEART ASSOCIATION
(2022)
Review
Biochemistry & Molecular Biology
Motoi Kanagawa
Summary: Dystroglycanopathy is a group of muscular dystrophies caused by abnormal glycosylation of dystroglycan, with diverse clinical symptoms ranging from congenital to adult-onset types. Research in the 2010s has identified the sugar chain structure and functions of causative gene products, created various model mice for studying pathological mechanisms, and proposed treatment strategies based on glycosylation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Review
Biochemistry & Molecular Biology
Alan Rawls, Bridget K. Diviak, Cameron I. Smith, Grant W. Severson, Sofia A. Acosta, Jeanne Wilson-Rawls
Summary: Muscular dystrophies are genetic muscle-wasting disorders characterized by chronic inflammation and fibrotic scarring in muscle tissue. Duchenne muscular dystrophy, the most common form, is typically treated with anti-inflammatory glucocorticoids; however, their long-term use is limited by adverse side effects. Developing new pharmacotherapeutic approaches to reduce muscle damage and promote repair is crucial.
Article
Chemistry, Multidisciplinary
Eri Sasaki, Yoshihiro Hayashi, Yuka Kimura, Sanae Sashida, Nobuhito Hamano, Kei Nirasawa, Keisuke Hamada, Fumihiko Katagiri, Yamato Kikkawa, Takaaki Sakai, Akihiro Yoshida, Masahiro Kawada, Shin-ichi Hirashima, Tsuyoshi Miura, Yoko Endo-Takahashi, Motoyoshi Nomizu, Yoichi Negishi
Summary: The study focused on developing A2G80-modified liposomes as a muscle-targeting nanocarrier for Duchenne muscular dystrophy (DMD) treatment. Through overlay assays, it was demonstrated that A2G80-LSP-Lip had an affinity for muscle tissue in mice and efficiently accumulated in muscle tissue when administered through the tail vein to DMD model mice. These results suggest that A2G80-LSP-Lip may serve as a useful tool for DMD treatment via systemic administration.
JOURNAL OF CONTROLLED RELEASE
(2021)
Article
Multidisciplinary Sciences
M. Osman Sheikh, Chantelle J. Capicciotti, Lin Liu, Jeremy Praissman, Dahai Ding, Daniel G. Mead, Melinda A. Brindley, Tobias Willer, Kevin P. Campbell, Kelley W. Moremen, Lance Wells, Geert-Jan Boons
Summary: Matriglycan plays a critical role in protein binding and viral infection, and its length can be adjusted accordingly. This finding contributes to a better understanding of the interaction between cells and viruses.
NATURE COMMUNICATIONS
(2022)
Review
Genetics & Heredity
Pitcha Chompoopong, Margherita Milone
Summary: GDP-mannose pyrophosphorylase B (GMPPB) is a cytoplasmic protein that catalyzes the formation of GDP-mannose. Impaired GMPPB function leads to alpha-dystroglycan (alpha-DG) disruptions, causing dystroglycanopathy. GMPPB-related disorders are inherited in an autosomal recessive manner and can manifest as severe congenital muscular dystrophy (CMD), limb-girdle muscular dystrophy (LGMD), or recurrent rhabdomyolysis. Mutations in GMPPB can also affect neuromuscular transmission and cause congenital myasthenic syndrome. The unique feature of GMPPB-related disorders is the impairment of neuromuscular transmission.
Article
Genetics & Heredity
Van Khanh Tran, Ngoc-Lan Nguyen, Lan Ngoc Thi Tran, Phuong Thi Le, Anh Hai Tran, Tuan L. A. Pham, Nguyen Thi Kim Lien, Nguyen Thi Xuan, Le Tat Thanh, Thanh Van Ta, Thinh Huy Tran, Huy-Hoang Nguyen
Summary: This study identified seven pathogenic/likely pathogenic variants in the LAMA2 gene in six patients with congenital muscular dystrophy from five unrelated Vietnamese families, providing genetic etiology and counseling for their parents.
FRONTIERS IN GENETICS
(2023)
Article
Genetics & Heredity
P. A. Chausova, O. P. Ryzhkova, G. E. Rudenskaya, V. B. Chernykh, O. A. Shchagina, A. V. Polyakov
Summary: Merosine deficient congenital muscular dystrophy is a common form of muscular dystrophy caused by a genetic deficiency. New variants with this type of inheritance may be hidden in the genetic makeup of parents.
FRONTIERS IN GENETICS
(2021)
Article
Biochemistry & Molecular Biology
Benjamin E. Hinz, Sydney G. Walker, Austin Xiong, Rose A. Gogal, Michael J. Schnieders, Lori L. Wallrath
Summary: Mutations in the LMNA gene cause laminopathies, with different amino acid substitutions leading to distinct diseases in Lamin A/C. The nature of the amino acid replacement may dictate disease severity and pathogenicity. In silico analyses suggest potential genotype-phenotype connections in laminopathies.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Multidisciplinary Sciences
Pedro Gameiro dos Santos, Ana Rita Soares, Solveig Thorsteinsdottir, Gabriela Rodrigues
Summary: The extracellular matrix (ECM) is important for cell structure and signaling. Traditional 2D cell culture models cannot accurately represent in vivo processes. Deficiencies in ECM composition and cell-ECM interactions contribute to various diseases.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2023)
Article
Multidisciplinary Sciences
Pedro Gameiro dos Santos, Ana Rita Soares, Solveig Thorsteinsdottir, Gabriela Rodrigues
Summary: The extracellular matrix (ECM) is important for cell structure and signaling. Two-dimensional cell culture models oversimplify cell-ECM interactions, while deficiencies in ECM and cell-ECM interactions contribute to disease progression.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2023)
Article
Health Care Sciences & Services
Abdallah Fayssoil, Nicolas Mansencal, Jean Bergounioux, Karim Wahbi, Tanya Stojkovic
Summary: This study investigates the impact of mechanical ventilation on cardiac function in patients with neuromuscular disorders. The results show that during ventilation setting modifications or introduction, it is crucial to focus on the systolic and diastolic functions of the right and left ventricles. These findings provide important information for the diagnosis and treatment of patients.
JOURNAL OF PERSONALIZED MEDICINE
(2022)
Article
Medicine, General & Internal
Amit Agarwal, Shyamsunder Sabat, Sangam Kanekar
Summary: Congenital muscular dystrophy is a group of neurological disorders characterized by weakness and hypotonia at birth. Fukuyama type of CMD, in particular, can have distinct imaging findings. We described the classic imaging findings in a child with this rare condition.
CUREUS JOURNAL OF MEDICAL SCIENCE
(2022)
Article
Clinical Neurology
Kittichate Visuttijai, Carola Hedberg-Oldfors, Ulrika Lindgren, Sara Nordstrom, Olof Eliasdottir, Christopher Lindberg, Anders Oldfors
Summary: Two patients with progressive external ophthalmoplegia (PEO) and mitochondrial myopathy were found to have mutations in the MT-TN gene, showing that MT-TN may be a hotspot for mutations causing sporadic PEO.
ACTA NEUROLOGICA SCANDINAVICA
(2021)
Article
Clinical Neurology
Carola Hedberg-Oldfors, Ulrika Lindgren, Swaraj Basu, Kittichate Visuttijai, Christopher Lindberg, Maria Falkenberg, Erik Larsson Lekholm, Anders Oldfors
Summary: Deep sequencing and quantitation of mtDNA variants in muscle samples from IBM patients and controls revealed significantly increased levels of large deletions and duplications in IBM muscles, as well as indications of increased somatic single nucleotide variants and reduced mtDNA copy numbers compared to controls. The distribution and types of variants were similar in IBM muscle and controls, suggesting an accelerated aging process in IBM muscle possibly associated with chronic inflammation.
Editorial Material
Clinical Neurology
Anders Oldfors
NEUROMUSCULAR DISORDERS
(2021)
Article
Clinical Neurology
Christer Thomsen, Edoardo Malfatti, Ana Jovanovic, Mark Roberts, Ognian Kalev, Christopher Lindberg, Anders Oldfors
Summary: This study identified the principal protein components of polyglucosan bodies in PGBM1 using quantitative mass spectrometry, immunohistochemical, and western blot analyses. The accumulated proteins were mainly related to glycogen metabolism and protein quality control pathways, indicating the potential role of protein aggregation in the pathobiology of polyglucosan storage disorders.
NEUROPATHOLOGY AND APPLIED NEUROBIOLOGY
(2022)
Article
Clinical Neurology
Sara Roos, Carola Hedberg-Oldfors, Kittichate Visuttijai, My Stein, Gittan Kollberg, Olof Eliasdottir, Christopher Lindberg, Niklas Darin, Anders Oldfors
Summary: This study investigated mitochondrial myopathy patients with the homoplasmic m.14674T>C variant, showing early onset of hypotonia and feeding difficulties, muscle histopathology characterized by lipid accumulation and mitochondrial proliferation. Immunoblotting and immunohistochemistry revealed significant deficiency in complex I subunit NDUFB8 and reduced expression of complex IV subunit MTCO1. Longitudinal follow-up data indicated the progressive nature of the disease.
Editorial Material
Cardiac & Cardiovascular Systems
Christian L. Polte, Entela Bollano, Anders Oldfors, Anna Dudas, Kerstin M. Lagerstrand, Jakob Himmelman, Emanuele Bobbio, Kristjan Karason, Martijn van Essen, Niklas Bergh
CIRCULATION-CARDIOVASCULAR IMAGING
(2022)
Editorial Material
Clinical Neurology
Anders Oldfors
NEUROMUSCULAR DISORDERS
(2022)
Editorial Material
Cardiac & Cardiovascular Systems
Christian L. Polte, Niklas Bergh, Anders Oldfors, Balsam Hanna, Entela Bollano
EUROPEAN HEART JOURNAL-CARDIOVASCULAR IMAGING
(2022)
Article
Clinical Neurology
Ulrika Lindgren, Rille Pullerits, Christopher Lindberg, Anders Oldfors
Summary: This population-based study investigated the prevalence, survival rate, and incidence of inclusion body myositis over a 33-year period in the Vastra Gotaland region of Sweden. The study also explored the symptom profiles associated with disease duration and sex. The results showed that inclusion body myositis is an autoimmune disease with decreased survival rate and marked sex differences in both prevalence and clinical manifestations.
ANNALS OF NEUROLOGY
(2022)
Article
Cardiac & Cardiovascular Systems
Emanuele Bobbio, Clara Hjalmarsson, Marie Bjorkenstam, Christian L. Polte, Anders Oldfors, Ulf Lindstrom, Pia Dahlberg, Sven-Erik Bartfay, Piotr Szamlewski, Amar Taha, Egidija Sakiniene, Kristjan Karason, Niklas Bergh, Entela Bollano
Summary: This study compared the demographics, clinical presentation, and outcome of patients diagnosed with cardiac sarcoidosis (CS) or giant cell myocarditis (GCM). The results showed that GCM has a more severe clinical course with higher levels of heart failure symptoms and a greater need for heart transplantation.
BMC CARDIOVASCULAR DISORDERS
(2022)
Article
Clinical Neurology
Marianela Schiava, Chiseko Ikenaga, Rocio Nur Villar-Quiles, Marta Caballero-Avila, Ana Topf, Ichizo Nishino, Virginia Kimonis, Bjarne Udd, Benedikt Schoser, Edmar Zanoteli, Paulo Victor Sgobbi Souza, Giorgio Tasca, Thomas Lloyd, Adolfo Lopez-de Munain, Carmen Paradas, Elena Pegoraro, Aleksandra Nadaj-Pakleza, Jan De Bleecker, Umesh Badrising, Alicia Alonso-Jimenez, Anna Kostera-Pruszczyk, Francesc Miralles, Jin-Hong Shin, Jorge Alfredo Bevilacqua, Montse Olive, Matthias Vorgerd, Rudi Kley, Stefen Brady, Timothy Williams, Cristina Dominguez-Gonzalez, George K. Papadimas, Jodi Warman, Kristl G. Claeys, Marianne de Visser, Nuria Muelas, Pascal LaForet, Edoardo Malfatti, Lindsay N. Alfano, Sruthi S. Nair, Georgios Manousakis, Hani A. Kushlaf, Matthew B. Harms, Christopher Nance, Alba Ramos-Fransi, Carmelo Rodolico, Channa Hewamadduma, Hakan Cetin, Jorge Garcia-Garcia, Endre Pal, Maria Elena Farrugia, Phillipa J. Lamont, Colin Quinn, Velina Nedkova-Hristova, Stojan Peric, Sushan Luo, Anders Oldfors, Kate Taylor, Stuart Ralston, Tanya Stojkovic, Conrad Weihl, Jordi Diaz-Manera
Summary: This study characterized patients with VCP gene mutations and investigated genotype-phenotype correlations, finding common symptoms and genetic variants. Specific genetic variants showed trends in affecting age of onset and severity. Additionally, the study provided valuable information on disease progression risk factors.
JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY
(2022)
Article
Clinical Neurology
Carola Hedberg-Oldfors, Ulrika Lindgren, Kittichate Visuttijai, Daniel Loof, Sara Roos, Christer Thomsen, Anders Oldfors
Summary: Patients with dermatomyositis (DM) have reduced aerobic metabolism and impaired muscle function due to mitochondrial respiratory chain dysfunction. This study found that the deficiency of complexes I and IV is a major cause of the disease, while complex II is unaffected. Depletion of mitochondrial RNA and a decrease in mtDNA copy number in affected muscle regions contribute to the muscle pathology and disturbed aerobic metabolism.
NEUROPATHOLOGY AND APPLIED NEUROBIOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Fredrik Noborn, Christer Thomsen, Egor Vorontsov, Emanuele Bobbio, Carina Sihlbom, Jonas Nilsson, Christian L. Polte, Entela Bollano, Kristina Vukusic, Joakim Sandstedt, Goran Dellgren, Kristjan Karason, Anders Oldfors, Goran Larson
Summary: A proteomics-based method for subtyping cardiac amyloidosis was introduced in this study, successfully diagnosing and confirming the majority of cases. Liquid chromatography-mass spectrometry was used for analysis, and significantly higher intensities of amyloid signature proteins were observed in affected cases compared to controls.
AMYLOID-JOURNAL OF PROTEIN FOLDING DISORDERS
(2023)
Article
Cardiac & Cardiovascular Systems
Entela Bollano, Christian Lars Polte, Mikko Mayranpaa, Anders Oldfors, Niklas Bergh, Jukka Lehtonen, Riina Kandolin
Summary: This study reports on four cases of cardiac involvement in patients who had mild COVID-19 and later developed symptomatic cardiac sarcoidosis or giant cell myocarditis 1-8 months after infection. All patients showed gradual improvement with immunosuppressive therapy. The temporal association suggests that COVID-19 could potentially trigger granulomatous myocarditis.
Article
Clinical Neurology
Ulrika Lindgren, Carola Hedberg-Oldfors, Rille Pullerits, Christopher Lindberg, Anders Oldfors
Summary: Inclusion body myositis (IBM) is an inflammatory myopathy with no effective treatment. A population-based study in western Sweden identified 142 patients with IBM, among which 6 patients were defined as early-onset IBM due to young age at symptom onset. These patients showed severe disease progression, high muscle mitochondrial DNA mutation load, and reduced survival in young and middle-aged individuals.
JOURNAL OF NEUROLOGY
(2023)