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1. Phenotypic, Electrophysiologic, and Imaging Spectrum of Hirayama Disease from Northern India

Author

Gomathy, Saranya B, Priyanka, Yamini, Garg, Ajay, Macken, William L, Agarwal, Ayush, Ahmed, Tanveer, Bhatia, Rohit, Goel, Vinay, Garg, Kanwaljeet, Pitceathly, Robert DS, Reilly, Mary M, Hanna, Michael G, Srivastava, MV Padma, and Vishnu, Venugopalan Y

Subjects
Diagnosis, Care and treatment, Usage, Physiological aspects, Health aspects, Neck -- Physiological aspects -- Health aspects, Monomelic amyotrophy -- Diagnosis -- Care and treatment, Magnetic resonance imaging -- Usage
Abstract

Author(s): Saranya B Gomathy [1]; Yamini Priyanka [2]; Ajay Garg [3]; William L Macken [4,5]; Ayush Agarwal [2]; Tanveer Ahmed [2]; Rohit Bhatia [2]; Vinay Goel [3]; Kanwaljeet Garg [6]; [...], Background and Objectives: Cervical flexion-induced myelopathy, also known as Hirayama disease (HD), is a lower motor neuron disorder seen mainly in adolescents and young adults, affecting the C7-T1 myotomes, presenting as asymmetric weakness with wasting of one or both the distal upper limbs. We aimed to describe the clinical features, electrophysiology, and radiologic features of HD in a tertiary care institute in northern India. Methods: One hundred and forty patients between 2017 and 2022 with clinical and imaging features consistent with HD were retrospectively reviewed from the All India Institute of Medical Sciences-Comprehensive Neuromuscular Diseases center database. Results: Majority were males with the mean age of onset of illness being 17.8 years. The median duration of the symptoms was 3 (1.5-4) years. Sixty-nine (49%) patients had unilateral involvement, and the disease was actively progressing in 88 (63%) patients at presentation. Two families had history of HD in two (1.4%) siblings. Electromyography showed abnormal findings in the clinically involved limb in all the patients and in the clinically uninvolved limb in 17/50 (34%) patients. Flexion magnetic resonance imaging (MRI) demonstrated forward dural displacement in 134 (96%) patients and asymmetric cord flattening in 124 (88.5%) patients. Disability was graded as mild, moderate, and severe; 12 (13%) had severe disability. The majority were managed conservatively, and four underwent surgery for HD. Conclusion: A high index of suspicion of HD needs to be kept in a young male presenting with distal upper limb weakness and atrophy. Dynamic MRI of the cervical spine in young adults presenting with hand wasting is inevitable. This disease needs to be managed aggressively and early to prevent serious dysfunction and loss of productivity. Keywords: Hirayama disease, dynamic MRI, electromyography, cervical collar

Published
2024
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2. The first genetically confirmed cohort of Facioscapulohumeral Muscular Dystrophy from Northern India

Author

Vishnu, Venugopalan Y., Lemmers, Richard J. L. F., Reyaz, Alisha, Mishra, Rinkle, Ahmad, Tanveer, van der Vliet, Patrick J., Kretkiewicz, Marcelina M., Macken, William L., Efthymiou, Stephanie, Dominik, Natalia, Morrow, Jasper M., Bhatia, Rohit, Wilson, Lindsay A., Houlden, Henry, Hanna, Michael G., Bugiardini, Enrico, van der Maarel, Silvère M., and Srivastava, M. V. Padma

Published
2024
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4. Biallelic PTPMT1 variants disrupt cardiolipin metabolism and lead to a neurodevelopmental syndrome.

Author

Falabella, Micol, Pizzamiglio, Chiara, Tabara, Luis Carlos, Munro, Benjamin, Abdel-Hamid, Mohamed S, Sonmezler, Ece, Macken, William L, Lu, Shanti, Tilokani, Lisa, Flannery, Padraig J, Patel, Nina, Pope, Simon A S, Heales, Simon J R, Hammadi, Dania B H, Alston, Charlotte L, Taylor, Robert W, Lochmuller, Hanns, Woodward, Cathy E, Labrum, Robyn, and Vandrovcova, Jana

Subjects
MITOCHONDRIAL dynamics, PROTEIN-tyrosine phosphatase, SENSORINEURAL hearing loss, MITOCHONDRIAL DNA, MITOCHONDRIAL pathology, OXIDATIVE phosphorylation
Abstract

Primary mitochondrial diseases (PMDs) are among the most common inherited neurological disorders. They are caused by pathogenic variants in mitochondrial or nuclear DNA that disrupt mitochondrial structure and/or function, leading to impaired oxidative phosphorylation (OXPHOS). One emerging subcategory of PMDs involves defective phospholipid metabolism. Cardiolipin, the signature phospholipid of mitochondria, resides primarily in the inner mitochondrial membrane, where it is biosynthesized and remodelled via multiple enzymes and is fundamental to several aspects of mitochondrial biology. Genes that contribute to cardiolipin biosynthesis have recently been linked with PMD. However, the pathophysiological mechanisms that underpin human cardiolipin-related PMDs are not fully characterized. Here, we report six individuals, from three independent families, harbouring biallelic variants in PTPMT1 , a mitochondrial tyrosine phosphatase required for de novo cardiolipin biosynthesis. All patients presented with a complex, neonatal/infantile onset neurological and neurodevelopmental syndrome comprising developmental delay, microcephaly, facial dysmorphism, epilepsy, spasticity, cerebellar ataxia and nystagmus, sensorineural hearing loss, optic atrophy and bulbar dysfunction. Brain MRI revealed a variable combination of corpus callosum thinning, cerebellar atrophy and white matter changes. Using patient-derived fibroblasts and skeletal muscle tissue, combined with cellular rescue experiments, we characterized the molecular defects associated with mutant PTPMT1 and confirmed the downstream pathogenic effects that loss of PTPMT1 has on mitochondrial structure and function. To further characterize the functional role of PTPMT1 in cardiolipin homeostasis, we created a ptpmt1 knockout zebrafish. This model had abnormalities in body size, developmental alterations, decreased total cardiolipin levels and OXPHOS deficiency. Together, these data indicate that loss of PTPMT1 function is associated with a new autosomal recessive PMD caused by impaired cardiolipin metabolism, highlighting the contribution of aberrant cardiolipin metabolism towards human disease and emphasizing the importance of normal cardiolipin homeostasis during neurodevelopment. [ABSTRACT FROM AUTHOR]

Published
2025
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5. Specialist multidisciplinary input maximises rare disease diagnoses from whole genome sequencing

Author

Macken, William L., Falabella, Micol, McKittrick, Caroline, Pizzamiglio, Chiara, Ellmers, Rebecca, Eggleton, Kelly, Woodward, Cathy E., Patel, Yogen, Labrum, Robyn, Phadke, Rahul, Reilly, Mary M., DeVile, Catherine, Sarkozy, Anna, Footitt, Emma, Davison, James, Rahman, Shamima, Houlden, Henry, Bugiardini, Enrico, Quinlivan, Rosaline, Hanna, Michael G., Vandrovcova, Jana, and Pitceathly, Robert D. S.

Published
2022
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8. De novo variants in ATXN7L3 lead to developmental delay, hypotonia and distinctive facial features.

Author

Harel, Tamar, Spicher, Camille, Scheer, Elisabeth, Buchan, Jillian G, Cech, Jennifer, Folland, Chiara, Frey, Tanja, Holtz, Alexander M, Innes, A Micheil, Keren, Boris, Macken, William L, Marcelis, Carlo, Otten, Catherine E, Paolucci, Sarah A, Petit, Florence, Pfundt, Rolph, Pitceathly, Robert D S, Rauch, Anita, Ravenscroft, Gianina, and Sanchev, Rani

Subjects
DEUBIQUITINATING enzymes, CONGENITAL disorders, DEVELOPMENTAL delay, GENETIC variation, ADAPTOR proteins
Abstract

Deubiquitination is crucial for the proper functioning of numerous biological pathways, such as DNA repair, cell cycle progression, transcription, signal transduction and autophagy. Accordingly, pathogenic variants in deubiquitinating enzymes (DUBs) have been implicated in neurodevelopmental disorders and congenital abnormalities. ATXN7L3 is a component of the DUB module of the Spt-Ada-Gcn5 acetyltransferase (SAGA) complex and two other related DUB modules, and it serves as an obligate adaptor protein of three ubiquitin-specific proteases (USP22, USP27X or USP51). Through exome sequencing and by using GeneMatcher, we identified nine individuals with heterozygous variants in ATXN7L3. The core phenotype included global motor and language developmental delay, hypotonia and distinctive facial characteristics, including hypertelorism, epicanthal folds, blepharoptosis, a small nose and mouth, and low-set, posteriorly rotated ears. To assess pathogenicity, we investigated the effects of a recurrent nonsense variant [c.340C>T; p.(Arg114Ter)] in fibroblasts of an affected individual. ATXN7L3 protein levels were reduced, and deubiquitylation was impaired, as indicated by an increase in histone H2Bub1 levels. This is consistent with the previous observation of increased H2Bub1 levels in Atxn7l3- null mouse embryos, which have developmental delay and embryonic lethality. In conclusion, we present clinical information and biochemical characterization supporting ATXN7L3 variants in the pathogenesis of a rare syndromic neurodevelopmental disorder. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Mutant PTPMT1 disrupts cardiolipin metabolism and mitochondrial bioenergetics leading to a neurodevelopmental syndrome

Author

Falabella, Micol, Pizzamiglio, Chiara, Tabara, Luis Carlos, Munro, Benjamin, Abdel-Hamid, Mohamed S., Sonmezler, Ece, Macken, William L., Lu, Shanti, Tilokani, Lisa, Flannery, Padraig J., Pope, Simon A.S., Heales, Simon J.R., Hammadi, Dania B.H., Alston, Charlotte L., Taylor, Robert W., Lochmuller, Hanns, Chronopoulou, Efstathia, Pierre, Germaine, Maroofian, Reza, Hanna, Michael G., Taanman, Jan-Willem, Hiz, Semra, Oktay, Yavuz, Zaki, Maha S., Horvath, Rita, Prudent, Julien, and Pitceathly, Robert D.S.

Published
2024
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11. Enhanced mitochondrial genome analysis: bioinformatic and long-read sequencing advances and their diagnostic implications

Author

Macken, William L., primary, Falabella, Micol, additional, Pizzamiglio, Chiara, additional, Woodward, Cathy E., additional, Scotchman, Elizabeth, additional, Chitty, Lyn S., additional, Polke, James M., additional, Bugiardini, Enrico, additional, Hanna, Michael G., additional, Vandrovcova, Jana, additional, Chandler, Natalie, additional, Labrum, Robyn, additional, and Pitceathly, Robert D.S., additional

Published
2023
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12. Neuromuscular disease genetics in under-represented populations: increasing data diversity

Author

Wilson, Lindsay A, primary, Macken, William L, additional, Perry, Luke D, additional, Record, Christopher J, additional, Schon, Katherine R, additional, Frezatti, Rodrigo S S, additional, Raga, Sharika, additional, Naidu, Kireshnee, additional, Köken, Özlem Yayıcı, additional, Polat, Ipek, additional, Kapapa, Musambo M, additional, Dominik, Natalia, additional, Efthymiou, Stephanie, additional, Morsy, Heba, additional, Nel, Melissa, additional, Fassad, Mahmoud R, additional, Gao, Fei, additional, Patel, Krutik, additional, Schoonen, Maryke, additional, Bisschoff, Michelle, additional, Vorster, Armand, additional, Jonvik, Hallgeir, additional, Human, Ronel, additional, Lubbe, Elsa, additional, Nonyane, Malebo, additional, Vengalil, Seena, additional, Nashi, Saraswati, additional, Srivastava, Kosha, additional, Lemmers, Richard J L F, additional, Reyaz, Alisha, additional, Mishra, Rinkle, additional, Töpf, Ana, additional, Trainor, Christina I, additional, Steyn, Elizabeth C, additional, Mahungu, Amokelani C, additional, van der Vliet, Patrick J, additional, Ceylan, Ahmet Cevdet, additional, Hiz, A Semra, additional, Çavdarlı, Büşranur, additional, Semerci Gündüz, C Nur, additional, Ceylan, Gülay Güleç, additional, Nagappa, Madhu, additional, Tallapaka, Karthik B, additional, Govindaraj, Periyasamy, additional, van der Maarel, Silvère M, additional, Narayanappa, Gayathri, additional, Nandeesh, Bevinahalli N, additional, Wa Somwe, Somwe, additional, Bearden, David R, additional, Kvalsund, Michelle P, additional, Ramdharry, Gita M, additional, Oktay, Yavuz, additional, Yiş, Uluç, additional, Topaloğlu, Haluk, additional, Sarkozy, Anna, additional, Bugiardini, Enrico, additional, Henning, Franclo, additional, Wilmshurst, Jo M, additional, Heckmann, Jeannine M, additional, McFarland, Robert, additional, Taylor, Robert W, additional, Smuts, Izelle, additional, van der Westhuizen, Francois H, additional, Sobreira, Claudia Ferreira da Rosa, additional, Tomaselli, Pedro J, additional, Marques, Wilson, additional, Bhatia, Rohit, additional, Dalal, Ashwin, additional, Srivastava, M V Padma, additional, Yareeda, Sireesha, additional, Nalini, Atchayaram, additional, Vishnu, Venugopalan Y, additional, Thangaraj, Kumarasamy, additional, Straub, Volker, additional, Horvath, Rita, additional, Chinnery, Patrick F, additional, Pitceathly, Robert D S, additional, Muntoni, Francesco, additional, Houlden, Henry, additional, Vandrovcova, Jana, additional, Reilly, Mary M, additional, and Hanna, Michael G, additional

Published
2023
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13. Factors associated with the severity of COVID-19 outcomes in people with neuromuscular diseases: Data from the International Neuromuscular COVID-19 Registry

Author

Holt, James, Pritchard, Jane, Wall, Jasmine, Gamez, Josep, Oktay, YAVUZ, Macken, William L, Nesbitt, Victoria, Sansone, Valeria, Evangelista, Teresinha, Watson-Fargie, Taylor, Keddie, Stephen, Ramaratnam, Sridharan, Desai, Soaham, Yareeda, Sireesha, Rinaldi, Simon, Raga, Sharika, Menon R, Sarath, Sasidharan, Sandhya, Neshuku, Saara, Keh, Ryan, Geraldes, Ruth, Paterson, Ross W, Nortley, Ross, McFarland, Robert, Horvath, Rita, Thomas, Rhys H, Mehta, Puja R, Ambrose, Philip, Chinnery, Patrick F, Price, Olivia, Musumeci, Olimpia, Janssen, Mirian, Mancuso, Michelangelo, Dhamne, Megha, Zosmer, Maya, Ciocca, Matteo, Laura, Matilde, Skorupinska, Mariola, Househam, Liz, Clayton, Lisa, Saavedra, Lillian, Brennan, Kathryn, Wannop, Kate, Shakthi, K J S, Pizzamiglio, Chiara, Pitceathly, Robert D S, Lunn, Michael P, Brady, Stefen, De Marchi, Fabiola, Galan, Lucia, Heckmann, Jeannine M, Horga, Alejandro, Molnar, Maria J, Oliveira, Acary S B, Pinto, Wladimir B V R, Primiano, Guido, Santos, Ernestina, Schoser, Benedikt, Servidei, Serenella, Sgobbi Souza, Paulo V, Venugopalan, Vishnu, Hanna, Michael G, Dimachkie, Mazen M, Machado, Pedro M, Lim, Albert, Elsaddig, Amar, Juanatey, Ana, Romeiro, Ana, Themistocleous, Andreas, Kiss-Csenki, Annamaria, Guerrero Sola, Antonio, Patil, Anuja, Duggal, Ashish, Gabriel, Carolyn, Marshall, Charles, Record, Christopher, Allen, Claire, Bearden, David, Rathna Sabapathi, DeviPriya, R, Dileep, Vecchio, Domizia, Newman, Edward, Eshun, Edwin, Foo, Eng C, Bugiardini, Enrico, Burke, Georgina, Ramdharry, Gita, Gorman, Gràinne S, Kumar, Guru, Sivasathiaseelan, Harri, Braga Farias, Igor, Smuts, Izelle, and Groothuis, Jan T

Subjects
Male, Oxygen, Neurology, SARS-CoV-2, Humans, COVID-19, Metabolic Disorders Radboud Institute for Molecular Life Sciences [Radboudumc 6], Female, Neuromuscular Diseases, Registries, Neurology (clinical), Middle Aged, Disorders of movement Donders Center for Medical Neuroscience [Radboudumc 3]
Abstract

Contains fulltext : 291815.pdf (Publisher’s version ) (Open Access) BACKGROUND AND PURPOSE: Clinical outcome information on patients with neuromuscular diseases (NMDs) who have been infected with SARS-CoV-2 is limited. The aim of this study was to determine factors associated with the severity of COVID-19 outcomes in people with NMDs. METHODS: Cases of NMD, of any age, and confirmed/presumptive COVID-19, submitted to the International Neuromuscular COVID-19 Registry up to 31 December 2021, were included. A mutually exclusive ordinal COVID-19 severity scale was defined as follows: (1) no hospitalization; (2) hospitalization without oxygenation; (3) hospitalization with ventilation/oxygenation; and (4) death. Multivariable ordinal logistic regression analyses were used to estimate odds ratios (ORs) for severe outcome, adjusting for age, sex, race/ethnicity, NMD, comorbidities, baseline functional status (modified Rankin scale [mRS]), use of immunosuppressive/immunomodulatory medication, and pandemic calendar period. RESULTS: Of 315 patients from 13 countries (mean age 50.3 [±17.7] years, 154 [48.9%] female), 175 (55.5%) were not hospitalized, 27 (8.6%) were hospitalized without supplemental oxygen, 91 (28.9%) were hospitalized with ventilation/supplemental oxygen, and 22 (7%) died. Higher odds of severe COVID-19 outcomes were observed for: age ≥50 years (50-64 years: OR 2.4, 95% confidence interval [CI] 1.33-4.31; >64 years: OR 4.16, 95% CI 2.12-8.15; both vs.

Published
2023
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14. Discussion of off-target and tentative genomic findings may sometimes be necessary to allow evaluation of their clinical significance

Author

Horton, Rachel H, Macken, William L, Pitceathly, Robert D S, and Lucassen, Anneke M

Abstract

We discuss a case where clinical genomic investigation of muscle weakness unexpectedly found a genetic variant that might (or might not) predispose to kidney cancer. We argue that despite its off-target and uncertain nature, this variant should be discussed with the man who had the test, not because it is medical information, but because this discussion would allow the further clinical evaluation that might lead it to becoming so. We argue that while prominent ethical debates around genomics often take ‘results’ as a starting point and ask questions as to whether to look for and how to react to them, the construction of genomic results is fraught with ethical complexity, although often couched as a primarily technical problem. We highlight the need for greater focus on, and appreciation of, the ethical work undertaken daily by scientists and clinicians working in genomic medicine and discuss how public conversations around genomics need to adapt to prepare future patients for potentially uncertain and unexpected outcomes from clinical genomic tests.

Published
2024
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16. Mitochondrial DNA analysis from exome sequencing data improves diagnostic yield in neurological diseases

Author

Poole, Olivia V, Pizzamiglio, Chiara, Murphy, David, Falabella, Micol, Macken, William L, Bugiardini, Enrico, Woodward, Cathy E, Labrum, Robyn, Efthymiou, Stephanie, Salpietro, Vincenzo, Chelban, Viorica, Kaiyrzhanov, Rauan, Maroofian, Reza, Synaps, Group, Aguennouz, M'Hammed, Di Rosa, Gabriella, Amato, Anthony A, Gregory, Allison, Hayflick, Susan J, Jonvik, Hallgeir, Wood, Nicholas, Houlden, Henry, Vandrovcova, Jana, Hanna, Michael G, Pittman, Alan, and Pitceathly, Robert D S

Subjects
Adult, Male, 0301 basic medicine, Mitochondrial DNA, Mitochondrial Diseases, Adolescent, Disease, Brief Communication, DNA, Mitochondrial, Young Adult, 03 medical and health sciences, 0302 clinical medicine, Exome Sequencing, Humans, Medicine, Exome sequencing, Aged, Aged, 80 and over, Genetics, business.industry, Middle Aged, Phenotype, Mtdna mutations, 030104 developmental biology, Neurology, Child, Preschool, Neurology (clinical), Nervous System Diseases, Brief Communications, business, 030217 neurology & neurosurgery
Abstract

A rapidly expanding catalog of neurogenetic disorders has encouraged a diagnostic shift towards early clinical whole exome sequencing (WES). Adult primary mitochondrial diseases (PMDs) frequently exhibit neurological manifestations that overlap with other nervous system disorders. However, mitochondrial DNA (mtDNA) is not routinely analyzed in standard clinical WES bioinformatic pipelines. We reanalyzed 11,424 exomes, enriched with neurological diseases, for pathogenic mtDNA variants. Twenty-four different mtDNA mutations were detected in 64 exomes, 11 of which were considered disease causing based on the associated clinical phenotypes. These findings highlight the diagnostic uplifts gained by analyzing mtDNA from WES data in neurological diseases. ANN NEUROL 2021;89:1240-1247.

Published
2021

17. Additional file 1 of Biallelic variants in COPB1 cause a novel, severe intellectual disability syndrome with cataracts and variable microcephaly

Author

Macken, William L., Godwin, Annie, Wheway, Gabrielle, Stals, Karen, Nazlamova, Liliya, Ellard, Sian, Alfares, Ahmed, Aloraini, Taghrid, AlSubaie, Lamia, Alfadhel, Majid, Alajaji, Sulaiman, Htoo A. Wai, Self, Jay, Douglas, Andrew G. L., Kao, Alexander P., Guille, Matthew, and Baralle, Diana

Abstract

Additional file 1: Fig. S1. Demonstrates how CRISPR/ cas9 genome editing induces exon skipping in X.tropicalis. Fig. S2. Shows the eye (a target organ) and the remainder of the crispant tadpole are equally mosaic. Fig. S3. Confirms that disruption to copb1 exon 8 in X.tropicalis mirrors syndromic hallmarks. Fig. S4. Supplemental figure demonstrates a more exaggerated phenotype in tadpoles injected with CRISPR/cas9 targeting exon 3, copb1. Fig. S5. Illustrates Xenopus anatomy and the significant reduction in brain size seen in transgenic tadpoles. Fig. S6. Shows there is no difference in localisation of wild type beta COP versus the Family 2 variant beta COP. Table S1. Details the immunodeficiency investigations performed in Family 2. Table S2. Details other shared homozygous variants identified in both probands of Family one.

Published
2021
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18. Solving patients with rare diseases through programmatic reanalysis of genome-phenome data

Author

Matalonga, Leslie, Hernández-Ferrer, Carles, DITF-ITHACA, Solve-RD, Verloes, Alain, Vissers, Lisenka, Vitobello, Antonio, Votypka, Pavel, Vyshka, Klea, Zurek, Birte, Baets, Jonathan, Beijer, Danique, Bonne, Gisèle, Cohen, Enzo, DITF-euroNMD, Solve-RD, Cossins, Judith, Evangelista, Teresinha, Ferlini, Alessandra, Hackman, Peter, Hanna, Michael G, Horvath, Rita, Houlden, Henry, Johari, Mridul, Lau, Jarred, Lochmüller, Hanns, DITF-RND, Solve-RD, Macken, William L, Musacchia, Francesco, Nascimento, Andres, Natera-de Benito, Daniel, Nigro, Vincenzo, Piluso, Giulio, Pini, Veronica, Pitceathly, Robert D S, Polavarapu, Kiran, Cruz, Pedro M Rodriguez, Tonda, Raul, Sarkozy, Anna, Savarese, Marco, Selvatici, Rita, Thompson, Rachel, Udd, Bjarne, Van de Vondel, Liedewei, Vandrovcova, Jana, Zaharieva, Irina, Balicza, Peter, Laurie, Steven, Chinnery, Patrick, Dürr, Alexandra, Haack, Tobias, Hengel, Holger, Kamsteeg, Erik-Jan, Kamsteeg, Christoph, Lohmann, Katja, Macaya, Alfons, Marcé-Grau, Anna, Fernandez-Callejo, Marcos, Maver, Ales, Molnar, Judit, Münchau, Alexander, Peterlin, Borut, Riess, Olaf, Schöls, Ludger, Schüle-Freyer, Rebecca, Stevanin, Giovanni, Synofzik, Matthis, Timmerman, Vincent, Picó, Daniel, van de Warrenburg, Bart, van Os, Nienke, Wayand, Melanie, Wilke, Carlo, Haack, Tobias B, Graessner, Holm, Ellwanger, Kornelia, Ossowski, Stephan, Demidov, German, Garcia-Linares, Carles, Sturm, Marc, Schulze-Hentrich, Julia M, Kessler, Christoph, Heutink, Peter, Brunner, Han, Scheffer, Hans, Papakonstantinou, Anastasios, Hoogerbrugge, Nicoline, 't Hoen, Peter A C, Steyaert, Wouter, Sablauskas, Karolis, Te Paske, Iris, Janssen, Erik, Steehouwer, Marloes, Yaldiz, Burcu, Corvó, Alberto, Brookes, Anthony J, Veal, Colin, Gibson, Spencer, Wadsley, Marc, Mehtarizadeh, Mehdi, Riaz, Umar, Warren, Greg, Dizjikan, Farid Yavari, Shorter, Thomas, Straub, Volker, Piscia, Davide, Joshi, Ricky, Bettolo, Chiara Marini, Specht, Sabine, Clayton-Smith, Jill, Banka, Siddharth, Alexander, Elizabeth, Jackson, Adam, Faivre, Laurence, Thauvin, Christel, Duffourd, Yannis, Tisserant, Emilie, Diez, Hector, Bruel, Ange-Line, Peyron, Christine, Pélissier, Aurore, Beltran, Sergi, Gut, Ivo Glynne, Bullich, Gemma, Gut, Ivo, Corvo, Alberto, Garcia, Carles, Hernández, Carles, Paramonov, Ida, Gumus, Gulcin, Bros-Facer, Virginie, Rath, Ana, Hoischen, Alexander, Hanauer, Marc, Olry, Annie, Lagorce, David, Havrylenko, Svitlana, Izem, Katia, Rigour, Fanny, Davoine, Claire-Sophie, Guillot-Noel, Léna, Heinzmann, Anna, Coarelli, Giulia, Allamand, Valérie, Nelson, Isabelle, Yaou, Rabah Ben, Metay, Corinne, Eymard, Bruno, Atalaia, Antonio, Stojkovic, Tanya, Macek, Milan, Turnovec, Marek, Thomasová, Dana, Kremliková, Radka Pourová, Franková, Vera, Havlovicová, Markéta, Kremlik, Vlastimil, Parkinson, Helen, Keane, Thomas, Consortia, Solve-RD, Spalding, Dylan, Senf, Alexander, Danis, Daniel, Robert, Glenn, Costa, Alessia, Patch, Christine, Hanna, Mike, Reilly, Mary, Muntoni, Francesco, de Jonghe, Peter, Banfi, Sandro, Torella, Annalaura, Cuesta, Isabel, Rossi, Rachele, Neri, Marcella, Aretz, Stefan, Spier, Isabel, Peters, Sophia, Oliveira, Carla, Pelaez, Jose Garcia, Matos, Ana Rita, José, Celina São, Ferreira, Marta, Gullo, Irene, Fernandes, Susana, Garrido, Luzia, Ferreira, Pedro, Carneiro, Fátima, Swertz, Morris A, Johansson, Lennart, van der Vries, Gerben, Neerincx, Pieter B, group, Solve-RD SNV-indel working, Denommé-Pichon, Anne-Sophie, Roelofs-Prins, Dieuwke, Köhler, Sebastian, Metcalfe, Alison, Rooryck, Caroline, Trimouille, Aurelien, Castello, Raffaele, Morleo, Manuela, Varavallo, Alessandra, De la Paz, Manuel Posada, Sánchez, Eva Bermejo, Martín, Estrella López, Delgado, Beatriz Martínez, de la Rosa, F Javier Alonso García, Radio, Francesca Clementina, Tartaglia, Marco, Renieri, Alessandra, Benetti, Elisa, Molnar, Maria Judit, Gilissen, Christian, Herzog, Rebecca, Pauly, Martje, Osorio, Andres Nascimiento, de Benito, Daniel Natera, Beeson, David, Capella, Gabriel, Valle, Laura, Holinski-Feder, Elke, Laner, Andreas, Steinke-Lange, Verena, Schröck, Evelin, Rump, Andreas, Li, Shuang, Prasanth, Sivakumar, Robinson, Peter, van der Velde, Joeri K, de Voer, Richarda M, Evans, Gareth, Sommer, Anna Katharina, Töpf, Ana, Paske, Iris Te, Tischkowitz, Marc, Casari, Giorgio, Ciolfi, Andrea, Dallapiccola, Bruno, de Boer, Elke, Vissers, Lisenka E L M, Hammarsjö, Anna, Havlovicova, Marketa, Hugon, Anne, de Voer, Richarda, Kleefstra, Tjitske, Lindstrand, Anna, López-Martín, Estrella, Nigro, Vicenzo, Nordgren, Ann, Pettersson, Maria, Pinelli, Michele, Pizzi, Simone, DITF-GENTURIS, Solve-RD, Posada, Manuel, Ryba, Lukas, Schwarz, Martin, Trimouille, Aurélien, Solve RD SNV Indel Working Grp, Solve RD DITF GENTURIS, Solve RD DITF ITHACA, Solve RD DITF-euroNMD, Solve RD DITF RND, Solve RD Consortia, Matalonga, L., Hernandez-Ferrer, C., Piscia, D., Cohen, E., Cuesta, I., Danis, D., Denomme-Pichon, A. -S., Duffourd, Y., Gilissen, C., Johari, M., Laurie, S., Li, S., Nelson, I., Peters, S., Paramonov, I., Prasanth, S., Robinson, P., Sablauskas, K., Savarese, M., Steyaert, W., van der Velde, J. K., Vitobello, A., Schule, R., Synofzik, M., Topf, A., Vissers, L. E. L. M., de Voer, R., Aretz, S., Capella, G., de Voer, R. M., Evans, G., Pelaez, J. G., Holinski-Feder, E., Hoogerbrugge, N., Laner, A., Oliveira, C., Rump, A., Schrock, E., Sommer, A. K., Steinke-Lange, V., Paske, I., Tischkowitz, M., Valle, L., Banka, S., Benetti, E., Casari, G., Ciolfi, A., Clayton-Smith, J., Dallapiccola, B., de Boer, E., Ellwanger, K., Faivre, L., Graessner, H., Haack, T. B., Hammarsjo, A., Havlovicova, M., Hoischen, A., Hugon, A., Jackson, A., Kleefstra, T., Lindstrand, A., Lopez-Martin, E., Macek, M., Morleo, M., Nigro, V., Nordgren, A., Pettersson, M., Pinelli, M., Pizzi, S., Posada, M., Radio, F. C., Renieri, A., Rooryck, C., Ryba, L., Schwarz, M., Tartaglia, M., Thauvin, C., Torella, A., Trimouille, A., Verloes, A., Vissers, L., Votypka, P., Vyshka, K., Zurek, B., Baets, J., Beijer, D., Bonne, G., Cossins, J., Evangelista, T., Ferlini, A., Hackman, P., Hanna, M. G., Horvath, R., Houlden, H., Lau, J., Lochmuller, H., Macken, W. L., Musacchia, F., Nascimento, A., Natera-de Benito, D., Piluso, G., Pini, V., Pitceathly, R. D. S., Polavarapu, K., Cruz, P. M. R., Sarkozy, A., Selvatici, R., Thompson, R., Udd, B., Van de Vondel, L., Vandrovcova, J., Zaharieva, I., Balicza, P., Chinnery, P., Durr, A., Haack, T., Hengel, H., Kamsteeg, E. -J., Kamsteeg, C., Lohmann, K., Macaya, A., Marce-Grau, A., Maver, A., Molnar, J., Munchau, A., Peterlin, B., Riess, O., Schols, L., Schule-Freyer, R., Stevanin, G., Timmerman, V., van de Warrenburg, B., van Os, N., Wayand, M., Wilke, C., Tonda, R., Fernandez-Callejo, M., Pico, D., Garcia-Linares, C., Papakonstantinou, A., Corvo, A., Joshi, R., Diez, H., Gut, I., Beltran, S., Ossowski, S., Demidov, G., Sturm, M., Schulze-Hentrich, J. M., Kessler, C., Heutink, P., Brunner, H., Scheffer, H., 't Hoen, P. A. C., te Paske, I., Janssen, E., Steehouwer, M., Yaldiz, B., Brookes, A. J., Veal, C., Gibson, S., Wadsley, M., Mehtarizadeh, M., Riaz, U., Warren, G., Dizjikan, F. Y., Shorter, T., Straub, V., Bettolo, C. M., Specht, S., Alexander, E., Tisserant, E., Bruel, A. -L., Peyron, C., Pelissier, A., Gut, I. G., Bullich, G., Garcia, C., Hernandez, C., Gumus, G., Bros-Facer, V., Rath, A., Hanauer, M., Olry, A., Lagorce, D., Havrylenko, S., Izem, K., Rigour, F., Davoine, C. -S., Guillot-Noel, L., Heinzmann, A., Coarelli, G., Allamand, V., Yaou, R. B., Metay, C., Eymard, B., Atalaia, A., Stojkovic, T., Turnovec, M., Thomasova, D., Kremlikova, R. P., Frankova, V., Kremlik, V., Parkinson, H., Keane, T., Spalding, D., Senf, A., Robert, G., Costa, A., Patch, C., Hanna, M., Reilly, M., Muntoni, F., de Jonghe, P., Banfi, S., Rossi, R., Neri, M., Spier, I., Matos, A. R., Jose, C. S., Ferreira, M., Gullo, I., Fernandes, S., Garrido, L., Ferreira, P., Carneiro, F., Swertz, M. A., Johansson, L., van der Vries, G., Neerincx, P. B., Roelofs-Prins, D., Kohler, S., Metcalfe, A., Castello, R., Varavallo, A., De la Paz, M. P., Sanchez, E. B., Martin, E. L., Delgado, B. M., de la Rosa, F. J. A. G., Molnar, M. J., Herzog, R., Pauly, M., Osorio, A. N., de Benito, D. N., Beeson, D., Unión Europea. Comisión Europea. H2020, Instituto de Salud Carlos III, Ministerio de Economía, Industria y Competitividad (España), Ministerio de Ciencia e Innovación. Centro de Excelencia Severo Ochoa (España), Government of Catalonia (España), Unión Europea. Fondo Europeo de Desarrollo Regional (FEDER/ERDF), Instituto Nacional de Bioinformatica (España), Klinische Genetica, RS: GROW - R4 - Reproductive and Perinatal Medicine, MUMC+: DA Klinische Genetica (5), Instituto de Salud Global - Institute For Global Health [Barcelona] (ISGlobal), Instituto de Salud Carlos III [Madrid] (ISC), Radboud University Medical Center [Nijmegen], Lipides - Nutrition - Cancer [Dijon - U1231] (LNC), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Equipe GAD (LNC - U1231), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Barcelona Institute of Science and Technology (BIST), Centre de recherche en Myologie – U974 SU-INSERM, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Folkhälsan Research Center, Faculty of Medecine [Helsinki], University of Helsinki-University of Helsinki, Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Bourgogne (UB)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche en Myologie, University of Helsinki, Department of Medical and Clinical Genetics, Medicum, and Groningen Institute for Gastro Intestinal Genetics and Immunology (3GI)

Subjects
Genetic testing, Computer science, genetics [Rare Diseases], lnfectious Diseases and Global Health Radboud Institute for Molecular Life Sciences [Radboudumc 4], EXOME, MEDICAL GENETICS, Diseases, Disease, VARIANTS, Genome informatics, Genomic analysis, Diseases, Genetic testing, Genome informatics, Genomic analysis, Tumours of the digestive tract Radboud Institute for Molecular Life Sciences [Radboudumc 14], Exome, Genetics (clinical), Exome sequencing, 0303 health sciences, Application programming interface, methods [Genomics], 030305 genetics & heredity, 1184 Genetics, developmental biology, physiology, Genomics, Disorders of movement Donders Center for Medical Neuroscience [Radboudumc 3], 3. Good health, Pedigree, diagnosis [Rare Diseases], Chemistry, Medical genetics, medicine.medical_specialty, methods [Genetic Testing], MEDLINE, Socio-culturale, Phenome, AMERICAN-COLLEGE, INHERITANCE, Sensitivity and Specificity, Article, standards [Genetic Testing], 03 medical and health sciences, Rare Diseases, [SDV.MHEP.AHA]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Genetics, medicine, Humans, ddc:610, Genetic Testing, Biology, 030304 developmental biology, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], Data science, Workflow, 3111 Biomedicine, standards [Genomics], Human medicine, Software
Abstract

Correction to: Solving patients with rare diseases through programmatic reanalysis of genome-phenome data. Eur J Hum Genet. 2021 Sep;29(9):1466-1469. doi: 10.1038/s41431-021-00934-6. PMID: 34393220 Reanalysis of inconclusive exome/genome sequencing data increases the diagnosis yield of patients with rare diseases. However, the cost and efforts required for reanalysis prevent its routine implementation in research and clinical environments. The Solve-RD project aims to reveal the molecular causes underlying undiagnosed rare diseases. One of the goals is to implement innovative approaches to reanalyse the exomes and genomes from thousands of well-studied undiagnosed cases. The raw genomic data is submitted to Solve-RD through the RD-Connect Genome-Phenome Analysis Platform (GPAP) together with standardised phenotypic and pedigree data. We have developed a programmatic workflow to reanalyse genome-phenome data. It uses the RD-Connect GPAP's Application Programming Interface (API) and relies on the big-data technologies upon which the system is built. We have applied the workflow to prioritise rare known pathogenic variants from 4411 undiagnosed cases. The queries returned an average of 1.45 variants per case, which first were evaluated in bulk by a panel of disease experts and afterwards specifically by the submitter of each case. A total of 120 index cases (21.2% of prioritised cases, 2.7% of all exome/genome-negative samples) have already been solved, with others being under investigation. The implementation of solutions as the one described here provide the technical framework to enable periodic case-level data re-evaluation in clinical settings, as recommended by the American College of Medical Genetics. The Solve-RD project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 779257. Data were analysed using the RD‐Connect Genome‐Phenome Analysis Platform, which received funding from EU projects RD‐Connect, Solve-RD and EJP-RD (grant numbers FP7 305444, H2020 779257, H2020 825575), Instituto de Salud Carlos III (grant numbers PT13/0001/0044, PT17/0009/0019; Instituto Nacional de Bioinformática, INB) and ELIXIR Implementation Studies. We acknowledge support of the Spanish Ministry of Economy, Industry and Competitiveness (MEIC) to the EMBL partnership, the Centro de Excelencia Severo Ochoa and the CERCA Programme/Generalitat de Catalunya. We also acknowledge the support of the Generalitat de Catalunya through Departament de Salut and Departament d’Empresa i Coneixement and the Co-financing by the Spanish Ministry of Economy, Industry and Competitiveness (MEIC) with funds from the European Regional Development Fund (ERDF) corresponding to the 2014-2020 Smart Growth Operating Program. Sí

Published
2021
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19. Exome reanalysis and proteomic profiling identified TRIP4 as a novel cause of cerebellar hypoplasia and spinal muscular atrophy (PCH1)

Author

Töpf, Ana, Pyle, Angela, Griffin, Helen, Matalonga, Leslie, Schon, Katherine, Sickmann, Albert, Schara–Schmidt, Ulrike, Hentschel, Andreas, Chinnery, Patrick F., Kölbel, Heike, Roos, Andreas, Horvath, Rita, Cohen, Enzo, Cuesta, Isabel, Danis, Daniel, Denommé-Pichon, Anne-Sophie, Duffourd, Yannis, Gilissen, Christian, Johari, Mridul, Laurie, Steven, Li, Shuang, Nelson, Isabelle, Paramonov, Ida, Peters, Sophia, Prasanth, Sivakumar, Robinson, Peter, Sablauskas, Karolis, Savarese, Marco, Steyaert, Wouter, Van Der Velde, Joeri K., Vitobello, Antonio, Baets, Jonathan, Beijer, Danique, Bonne, Gisèle, Cossins, Judith, Evangelista, Teresinha, Ferlini, Alessandra, Hackman, Peter, Hanna, Michael G., Houlden, Henry, Lau, Jarred, Lochmüller, Hanns, Macken, William L., Musacchia, Francesco, Nascimento, Andres, Natera-De Benito, Daniel, Nigro, Vincenzo, Piluso, Giulio, Pini, Veronica, Pitceathly, Robert D. S., Polavarapu, Kiran, Cruz, Pedro M. Rodriguez, Sarkozy, Anna, Selvatici, Rita, Thompson, Rachel, Torella, Annalaura, Udd, Bjarne, Van De Vondel, Liedewei, Vandrovcova, Jana, Zaharieva, Irina, Schon, Katherine [0000-0001-8054-8954], Horvath, Rita [0000-0002-9841-170X], Apollo - University of Cambridge Repository, Newcastle Upon Tyne Hospitals NHS Foundation Trust, Barcelona Institute of Science and Technology (BIST), University of Cambridge [UK] (CAM), Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., University of Aberdeen, Ruhr-Universität Bochum [Bochum], University Children's Hospital of Essen [Essen, Germany], Enzo Cohen, Isabel Cuesta, Daniel Danis, Anne-Sophie Denommé-Pichon, Yannis Duffourd, Christian Gilissen, Mridul Johari, Steven Laurie, Shuang Li, Isabelle Nelson, Ida Paramonov, Sophia Peters, Sivakumar Prasanth, Peter Robinson, Karolis Sablauskas, Marco Savarese, Wouter Steyaert, Joeri K van der Velde, Antonio Vitobello, Jonathan Baets, Danique Beijer, Gisèle Bonne, Judith Cossins, Teresinha Evangelista, Alessandra Ferlini, Peter Hackman, Michael G Hanna, Henry Houlden, Jarred Lau, Hanns Lochmüller, William L Macken, Francesco Musacchia, Andres Nascimento, Daniel Natera-de Benito, Vincenzo Nigro, Giulio Piluso, Veronica Pini, Robert D S Pitceathly, Kiran Polavarapu, Pedro M Rodriguez Cruz, Anna Sarkozy, Rita Selvatici, Rachel Thompson, Annalaura Torella, Bjarne Udd, Liedewei Van de Vondel, Jana Vandrovcova, Irina Zaharieva, Töpf, Ana, Pyle, Angela, Griffin, Helen, Matalonga, Leslie, Schon, Katherine, Sickmann, Albert, Schara-Schmidt, Ulrike, Hentschel, Andrea, Chinnery, Patrick F, Kölbel, Heike, Roos, Andrea, Horvath, Rita, Nigro, Vincenzo, Torella, Annalaura, and Piluso, Giulio

Subjects
0301 basic medicine, Male, Proteome, 45/41, Developmental Disabilities, Medizin, 45/22, Biology, Bioinformatics, Nervous System Malformations, Brief Communication, 82/80, Muscular Atrophy, Spinal, 03 medical and health sciences, 0302 clinical medicine, Cerebellum, 38/23, Genetics research, Genetics, medicine, [SDV.MHEP.AHA]Life Sciences [q-bio]/Human health and pathology/Tissues and Organs [q-bio.TO], Humans, Exome, Genetic Testing, Gene, Cerebellar hypoplasia, Genetics (clinical), Exome sequencing, Proteomic Profile, Proteomic Profiling, 82/58, 631/208/514/2254, brief-communication, 692/308/2056, Infant, Metabolic Disorders Radboud Institute for Molecular Life Sciences [Radboudumc 6], Spinal muscular atrophy, medicine.disease, 3. Good health, 030104 developmental biology, Congenital muscular dystrophy, Next-generation sequencing, 030217 neurology & neurosurgery, Transcription Factors
Abstract

TRIP4 is one of the subunits of the transcriptional coregulator ASC-1, a ribonucleoprotein complex that participates in transcriptional coactivation and RNA processing events. Recessive variants in the TRIP4 gene have been associated with spinal muscular atrophy with bone fractures as well as a severe form of congenital muscular dystrophy. Here we present the diagnostic journey of a patient with cerebellar hypoplasia and spinal muscular atrophy (PCH1) and congenital bone fractures. Initial exome sequencing analysis revealed no candidate variants. Reanalysis of the exome data by inclusion in the Solve-RD project resulted in the identification of a homozygous stop-gain variant in the TRIP4 gene, previously reported as disease-causing. This highlights the importance of analysis reiteration and improved and updated bioinformatic pipelines. Proteomic profile of the patient's fibroblasts showed altered RNA-processing and impaired exosome activity supporting the pathogenicity of the detected variant. In addition, we identified a novel genetic form of PCH1, further strengthening the link of this characteristic phenotype with altered RNA metabolism. The Solve-RD project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 779257. Several authors of this study are members of the European Reference Network for Neuromuscular disease, Project ID No 739543. This study was supported by the AFM (grant 21644 to AR), the framework of the NME-GPS project by the European Regional Development Fund (AR/US/AS), the support by the Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen, the Regierende Bürgermeister von Berlin-inkl. Wissenschaft und Forschung, and the Bundesministerium für Bildung und Forschung (AH and AS), the European Research Council (RH), the Wellcome Investigator Award (109915/Z/15/Z to RH), the Medical Research Council UK (MR/N025431/1 to RH), the Newton Fund (MR/N027302/1 to RH), the Lily Foundation (RH) and the Evelyn Trust (RH). This research was supported by an MRC strategic award to establish an International Centre for Genomic Medicine in Neuromuscular Diseases (ICGNMD) MR/S005021/1 and the NIHR Cambridge Biomedical Research Centre (BRC-1215-20014). The views expressed are those of the authors and not necessarily those of the NIHR or the Department of Health and Social Care

Published
2020
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21. Mitochondrial DNA Analysis from Exome Sequencing Data Improves Diagnostic Yield in Neurological Diseases.

Author

Poole, Olivia V., Pizzamiglio, Chiara, Murphy, David, Falabella, Micol, Macken, William L., Bugiardini, Enrico, Woodward, Cathy E., Labrum, Robyn, Efthymiou, Stephanie, Salpietro, Vincenzo, Chelban, Viorica, Kaiyrzhanov, Rauan, Maroofian, Reza, Amato, Anthony A., Gregory, Allison, Hayflick, Susan J., Jonvik, Hallgeir, Wood, Nicholas, Houlden, Henry, and Vandrovcova, Jana

Subjects
MITOCHONDRIAL DNA, DNA analysis, NEUROLOGICAL disorders, NERVOUS system, PHENOTYPES, DIAGNOSIS of neurological disorders, RESEARCH, DNA, MITOCHONDRIAL pathology, RESEARCH methodology, MEDICAL cooperation, EVALUATION research, COMPARATIVE studies
Abstract

A rapidly expanding catalog of neurogenetic disorders has encouraged a diagnostic shift towards early clinical whole exome sequencing (WES). Adult primary mitochondrial diseases (PMDs) frequently exhibit neurological manifestations that overlap with other nervous system disorders. However, mitochondrial DNA (mtDNA) is not routinely analyzed in standard clinical WES bioinformatic pipelines. We reanalyzed 11,424 exomes, enriched with neurological diseases, for pathogenic mtDNA variants. Twenty-four different mtDNA mutations were detected in 64 exomes, 11 of which were considered disease causing based on the associated clinical phenotypes. These findings highlight the diagnostic uplifts gained by analyzing mtDNA from WES data in neurological diseases. ANN NEUROL 2021;89:1240-1247. [ABSTRACT FROM AUTHOR]

Published
2021
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24. Cognitive and sleep evaluation of Myotonic dystrophy type I: A protocol for a case‐control study.

Author

MISHRA, RINKLE, Gupta, Anu, Garg, Divyani, Padma, Vasantha, BHATIA, ROHIT, Macken, William L, Dalal, Ashwin, Ahmad, Tanveer, Reyaz, Alisha, Pitceathly, Robert D. S., Thangaraj, K, Hanna, Michael G, and Vishnu, Venugopalan Y

Abstract

Background: Myotonic dystrophy type 1 (DM1) is one of the most common inherited muscular dystrophies in adults. It is caused by CTG repeat expansions in the 3' untranslated region (UTR) of the DMPK gene on Chromosome 19. Apart from muscle, the disease can involve the eye, heart, brain and endocrine system. Cognitive and sleep disturbances are common but poorly recognized non‐motor manifestations of DM1. Method: We plan to recruit 30 genetically proven DM1 patients from the prospective MRC‐funded International Centre for Genomic Medicine in Neuromuscular Diseases (ICGNMD) cohort. Neuromuscular phenotyping will be done by the same neuromuscular expert. The muscle strength will be assessed by the Medical Research Council scale and Muscular Impairment Rating Scale (MIRS). We will exclude patients with severe depression. An age and sex‐matched control group of 30 healthy participants will be included to evaluate patients' cognitive profiles. A comprehensive neuropsychological evaluation (NPS) to assess multiple cognitive domains will be conducted on all patients. A prescheduled sleep history, Epworth Sleepiness Scale (ESS), Pittsburg sleep quality index (PSQI) and full‐night diagnostic polysomnography will be done in all patients. Result: The outcomes include the NPS domains comparing cognitive impairment compared to controls and the severity and type of sleep apnea (apnea‐hypopnea index [AHI]) Conclusion: The study will investigate the DM1 cognitive profile and its relationship with sleep disturbance using motor scales, neuropsychological assessment and polysomnography. [ABSTRACT FROM AUTHOR]

Published
2023
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