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González-Reyes M, Aragón J, Sánchez-Trujillo A, Rodríguez-Martínez G, Duarte K, Eleftheriou E, Barnier JV, Naquin D, Thermes C, Romo-Yáñez J, Roger JE, Rendon A, Vaillend C, Montanez C. Expression of Dystrophin Dp71 Splice Variants Is Temporally Regulated During Rodent Brain Development. Mol Neurobiol 2024:10.1007/s12035-024-04232-2. [PMID: 38802640 DOI: 10.1007/s12035-024-04232-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 05/13/2024] [Indexed: 05/29/2024]
Abstract
Dystrophin Dp71 is the major product of the Duchenne muscular dystrophy (DMD) gene in the brain, and its loss in DMD patients and mouse models leads to cognitive impairments. Dp71 is expressed as a range of proteins generated by alternative splicing of exons 71 to 74 and 78, classified in the main Dp71d and Dp71f groups that contain specific C-terminal ends. However, it is unknown whether each isoform has a specific role in distinct cell types, brain regions, and/or stages of brain development. In the present study, we characterized the expression of Dp71 isoforms during fetal (E10.5, E15.5) and postnatal (P1, P7, P14, P21 and P60) mouse and rat brain development. We finely quantified the expression of several Dp71 transcripts by RT-PCR and cloning assays in samples from whole-brain and distinct brain structures. The following Dp71 transcripts were detected: Dp71d, Dp71d∆71, Dp71d∆74, Dp71d∆71,74, Dp71d∆71-74, Dp71f, Dp71f∆71, Dp71f∆74, Dp71f∆71,74, and Dp71fΔ71-74. We found that the Dp71f isoform is the main transcript expressed at E10.5 (> 80%), while its expression is then progressively reduced and replaced by the expression of isoforms of the Dp71d group from E15.5 to postnatal and adult ages. This major finding was confirmed by third-generation nanopore sequencing. In addition, we found that the level of expression of specific Dp71 isoforms varies as a function of postnatal stages and brain structure. Our results suggest that Dp71 isoforms have different and complementary roles during embryonic and postnatal brain development, likely taking part in a variety of maturation processes in distinct cell types.
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Affiliation(s)
- Mayram González-Reyes
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Mexico City, Mexico
- Institut des Neurosciences Paris Saclay, Université Paris-Saclay, CNRS, Saclay, 91400, France
| | - Jorge Aragón
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Mexico City, Mexico
- Institut de la Vision, Sorbonne Université-INSERM-CNRS, 17 rue Moreau, Paris, 75012, France
| | - Alejandra Sánchez-Trujillo
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Mexico City, Mexico
| | - Griselda Rodríguez-Martínez
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Mexico City, Mexico
- Laboratorio de Investigación en Inmunología y Proteómica, Hospital Infantil de México Federico Gómez, Mexico City, Mexico
| | - Kevin Duarte
- Institut des Neurosciences Paris Saclay, Université Paris-Saclay, CNRS, Saclay, 91400, France
| | - Evangelia Eleftheriou
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Gif-sur-Yvette, 91198, France
| | - Jean-Vianney Barnier
- Institut des Neurosciences Paris Saclay, Université Paris-Saclay, CNRS, Saclay, 91400, France
| | - Delphine Naquin
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Gif-sur-Yvette, 91198, France
| | - Claude Thermes
- Institute for Integrative Biology of the Cell (I2BC), Université Paris-Saclay, CEA, CNRS, Gif-sur-Yvette, 91198, France
| | - José Romo-Yáñez
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Mexico City, Mexico
- Institut de la Vision, Sorbonne Université-INSERM-CNRS, 17 rue Moreau, Paris, 75012, France
- Coordinación de Endocrinología Ginecológica y Perinatal, Instituto Nacional de Perinatología, Mexico City, Mexico
| | - Jérome E Roger
- Institut des Neurosciences Paris Saclay, Université Paris-Saclay, CNRS, Saclay, 91400, France
- CERTO-Retina France, Saclay, 91400, France
| | - Alvaro Rendon
- Institut de la Vision, Sorbonne Université-INSERM-CNRS, 17 rue Moreau, Paris, 75012, France
| | - Cyrille Vaillend
- Institut des Neurosciences Paris Saclay, Université Paris-Saclay, CNRS, Saclay, 91400, France.
| | - Cecilia Montanez
- Departamento de Genética y Biología Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Mexico City, Mexico.
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Peruzzo D, Ciceri T, Mascheretti S, Lampis V, Arrigoni F, Agarwal N, Giubergia A, Villa FM, Crippa A, Nobile M, Mani E, Russo A, D'Angelo MG. Brain Alteration Patterns in Children with Duchenne Muscular Dystrophy: A Machine Learning Approach to Magnetic Resonance Imaging. J Neuromuscul Dis 2024:JND230075. [PMID: 38578898 DOI: 10.3233/jnd-230075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2024]
Abstract
Background Duchenne Muscular Dystrophy (DMD) is a genetic disease in which lack of the dystrophin protein causes progressive muscular weakness, cardiomyopathy and respiratory insufficiency. DMD is often associated with other cognitive and behavioral impairments, however the correlation of abnormal dystrophin expression in the central nervous system with brain structure and functioning remains still unclear. Objective To investigate brain involvement in patients with DMD through a multimodal and multivariate approach accounting for potential comorbidities. Methods We acquired T1-weighted and Diffusion Tensor Imaging data from 18 patients with DMD and 18 age- and sex-matched controls with similar cognitive and behavioral profiles. Cortical thickness, structure volume, fractional anisotropy and mean diffusivity measures were used in a multivariate analysis performed using a Support Vector Machine classifier accounting for potential comorbidities in patients and controls. Results the classification experiment significantly discriminates between the two populations (97.2% accuracy) and the forward model weights showed that DMD mostly affects the microstructural integrity of long fiber bundles, in particular in the cerebellar peduncles (bilaterally), in the posterior thalamic radiation (bilaterally), in the fornix and in the medial lemniscus (bilaterally). We also reported a reduced cortical thickness, mainly in the motor cortex, cingulate cortex, hippocampal area and insula. Conclusions Our study identified a small pattern of alterations in the CNS likely associated with the DMD diagnosis.
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Affiliation(s)
- Denis Peruzzo
- Neuroimaging Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Tommaso Ciceri
- Neuroimaging Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Sara Mascheretti
- Child Psychopathology Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia (PV), Italy
| | - Valentina Lampis
- Child Psychopathology Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia (PV), Italy
| | - Filippo Arrigoni
- Neuroimaging Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
- Paediatric Radiology and Neuroradiology Department, V. Buzzi Children's Hospital, Milan, Italy
| | - Nivedita Agarwal
- Diagnostic Imaging and Neuroradiology Unit, Scientific Institute IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Alice Giubergia
- Neuroimaging Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Filippo Maria Villa
- Child Psychopathology Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Alessandro Crippa
- Child Psychopathology Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Maria Nobile
- Child Psychopathology Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Elisa Mani
- Child Psychopathology Unit,Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Annamaria Russo
- Unit of Rehabilitation of Rare Diseases of the Central and Peripheral Nervous System, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
| | - Maria Grazia D'Angelo
- Unit of Rehabilitation of Rare Diseases of the Central and Peripheral Nervous System, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Italy
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Arreguin AJ, Shao Z, Colognato H. Dmd mdx mice have defective oligodendrogenesis, delayed myelin compaction and persistent hypomyelination. Dis Model Mech 2024; 17:dmm050115. [PMID: 38721692 PMCID: PMC11095635 DOI: 10.1242/dmm.050115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 03/28/2024] [Indexed: 05/18/2024] Open
Abstract
Duchenne muscular dystrophy (DMD) is caused by mutations in the DMD gene, resulting in the loss of dystrophin, a large cytosolic protein that links the cytoskeleton to extracellular matrix receptors in skeletal muscle. Aside from progressive muscle damage, many patients with DMD also have neurological deficits of unknown etiology. To investigate potential mechanisms for DMD neurological deficits, we assessed postnatal oligodendrogenesis and myelination in the Dmdmdx mouse model. In the ventricular-subventricular zone (V-SVZ) stem cell niche, we found that oligodendrocyte progenitor cell (OPC) production was deficient, with reduced OPC densities and proliferation, despite a normal stem cell niche organization. In the Dmdmdx corpus callosum, a large white matter tract adjacent to the V-SVZ, we also observed reduced OPC proliferation and fewer oligodendrocytes. Transmission electron microscopy further revealed significantly thinner myelin, an increased number of abnormal myelin structures and delayed myelin compaction, with hypomyelination persisting into adulthood. Our findings reveal alterations in oligodendrocyte development and myelination that support the hypothesis that changes in diffusion tensor imaging seen in patients with DMD reflect developmental changes in myelin architecture.
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Affiliation(s)
- Andrea J. Arreguin
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, NY 11794, USA
- Medical Scientist Training Program (MSTP), Stony Brook University, Stony Brook, NY 11794-8651, USA
| | - Zijian Shao
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, NY 11794, USA
| | - Holly Colognato
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, NY 11794, USA
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Da Cunha D, Miro J, Van Goethem C, Notarnicola C, Hugon G, Carnac G, Cossée M, Koenig M, Tuffery-Giraud S. The exon junction complex is required for DMD gene splicing fidelity and myogenic differentiation. Cell Mol Life Sci 2024; 81:150. [PMID: 38512499 PMCID: PMC10957711 DOI: 10.1007/s00018-024-05188-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 02/14/2024] [Accepted: 02/28/2024] [Indexed: 03/23/2024]
Abstract
Deposition of the exon junction complex (EJC) upstream of exon-exon junctions helps maintain transcriptome integrity by preventing spurious re-splicing events in already spliced mRNAs. Here we investigate the importance of EJC for the correct splicing of the 2.2-megabase-long human DMD pre-mRNA, which encodes dystrophin, an essential protein involved in cytoskeletal organization and cell signaling. Using targeted RNA-seq, we show that knock-down of the eIF4A3 and Y14 core components of EJC in a human muscle cell line causes an accumulation of mis-splicing events clustered towards the 3' end of the DMD transcript (Dp427m). This deregulation is conserved in the short Dp71 isoform expressed ubiquitously except in adult skeletal muscle and is rescued with wild-type eIF4A3 and Y14 proteins but not with an EJC assembly-defective mutant eIF4A3. MLN51 protein and EJC-associated ASAP/PSAP complexes independently modulate the inclusion of the regulated exons 71 and 78. Our data confirm the protective role of EJC in maintaining splicing fidelity, which in the DMD gene is necessary to preserve the function of the critical C-terminal protein-protein interaction domain of dystrophin present in all tissue-specific isoforms. Given the role of the EJC in maintaining the integrity of dystrophin, we asked whether the EJC could also be involved in the regulation of a mechanism as complex as skeletal muscle differentiation. We found that eIF4A3 knockdown impairs myogenic differentiation by blocking myotube formation. Collectively, our data provide new insights into the functional roles of EJC in human skeletal muscle.
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Affiliation(s)
- Dylan Da Cunha
- PhyMedExp, Univ Montpellier, CNRS, INSERM, Montpellier, France
| | - Julie Miro
- PhyMedExp, Univ Montpellier, CNRS, INSERM, Montpellier, France
| | - Charles Van Goethem
- Laboratoire de Génétique Moléculaire, CHU de Montpellier, Montpellier, France
- Montpellier BioInformatique Pour Le Diagnostic Clinique (MOBIDIC), Plateau de Médecine Moléculaire Et Génomique (PMMG), CHU Montpellier, 34295, Montpellier, France
| | | | - Gérald Hugon
- PhyMedExp, Univ Montpellier, CNRS, INSERM, Montpellier, France
| | - Gilles Carnac
- PhyMedExp, Univ Montpellier, CNRS, INSERM, Montpellier, France
| | - Mireille Cossée
- PhyMedExp, Univ Montpellier, CNRS, INSERM, Montpellier, France
- Laboratoire de Génétique Moléculaire, CHU de Montpellier, Montpellier, France
| | - Michel Koenig
- PhyMedExp, Univ Montpellier, CNRS, INSERM, Montpellier, France
- Laboratoire de Génétique Moléculaire, CHU de Montpellier, Montpellier, France
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Dowling P, Swandulla D, Ohlendieck K. Mass Spectrometry-Based Proteomic Technology and Its Application to Study Skeletal Muscle Cell Biology. Cells 2023; 12:2560. [PMID: 37947638 PMCID: PMC10649384 DOI: 10.3390/cells12212560] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/27/2023] [Accepted: 10/31/2023] [Indexed: 11/12/2023] Open
Abstract
Voluntary striated muscles are characterized by a highly complex and dynamic proteome that efficiently adapts to changed physiological demands or alters considerably during pathophysiological dysfunction. The skeletal muscle proteome has been extensively studied in relation to myogenesis, fiber type specification, muscle transitions, the effects of physical exercise, disuse atrophy, neuromuscular disorders, muscle co-morbidities and sarcopenia of old age. Since muscle tissue accounts for approximately 40% of body mass in humans, alterations in the skeletal muscle proteome have considerable influence on whole-body physiology. This review outlines the main bioanalytical avenues taken in the proteomic characterization of skeletal muscle tissues, including top-down proteomics focusing on the characterization of intact proteoforms and their post-translational modifications, bottom-up proteomics, which is a peptide-centric method concerned with the large-scale detection of proteins in complex mixtures, and subproteomics that examines the protein composition of distinct subcellular fractions. Mass spectrometric studies over the last two decades have decisively improved our general cell biological understanding of protein diversity and the heterogeneous composition of individual myofibers in skeletal muscles. This detailed proteomic knowledge can now be integrated with findings from other omics-type methodologies to establish a systems biological view of skeletal muscle function.
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Affiliation(s)
- Paul Dowling
- Department of Biology, Maynooth University, National University of Ireland, W23 F2H6 Maynooth, Co. Kildare, Ireland;
- Kathleen Lonsdale Institute for Human Health Research, Maynooth University, W23 F2H6 Maynooth, Co. Kildare, Ireland
| | - Dieter Swandulla
- Institute of Physiology, Faculty of Medicine, University of Bonn, D53115 Bonn, Germany;
| | - Kay Ohlendieck
- Department of Biology, Maynooth University, National University of Ireland, W23 F2H6 Maynooth, Co. Kildare, Ireland;
- Kathleen Lonsdale Institute for Human Health Research, Maynooth University, W23 F2H6 Maynooth, Co. Kildare, Ireland
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Zhang XF, Luo YY, Jiang L, Hong SQ. Clinical study on cognitive impairment in Duchenne muscular dystrophy. Neuromuscul Disord 2023; 33:596-604. [PMID: 37385106 DOI: 10.1016/j.nmd.2023.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 05/29/2023] [Accepted: 06/01/2023] [Indexed: 07/01/2023]
Abstract
Our study aimed to explore the intellectual function of patients with Duchenne muscular dystrophy (DMD) in China and examine the correlation of full-scale intelligence quotient (FSIQ) with age, mutation locations, mutation class, and dystrophin isoforms. We assessed 64 boys with DMD using The Wechsler Intelligence Scales for Children-Fourth Edition and compared intellectual function at enrollment and follow-up in the 15 patients who completed the follow-up. Our findings confirm that boys with DMD may exhibit cognitive impairment, with the Working Memory Index being the most impaired. There was no significant correlation between FSIQ and age; however, a positive correlation was noted between age and the Verbal Comprehension Index. FSIQ was not associated with mutation class, the number of affected mutated exons, or mutation locations. However, there was a significant difference in FSIQ between the groups with intact and deficient Dp140. Fifteen participants adhered to glucocorticoid therapy throughout the two-year follow-up period, and eleven of them showed an improvement in FSIQ compared to their initial scores, with improvement ranging from 2 to 20. In conclusion, patients with the cumulative loss of isoforms in the brain are at a higher risk of cognitive deficits and may require early cognitive interventions.
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Affiliation(s)
- Xiao-Fang Zhang
- Department of Neurology Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Yuan-Yuan Luo
- Department of Neurology Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Li Jiang
- Department of Neurology Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Si-Qi Hong
- Department of Neurology Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, China International Science and Technology Cooperation base of Child development and Critical Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China.
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7
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Donandt T, Todorow V, Hintze S, Graupner A, Schoser B, Walter MC, Meinke P. Nuclear Small Dystrophin Isoforms during Muscle Differentiation. Life (Basel) 2023; 13:1367. [PMID: 37374149 DOI: 10.3390/life13061367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/05/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
Mutations in the DMD gene can cause Duchenne or Becker muscular dystrophy (DMD/BMD) by affecting the giant isoform of dystrophin, a protein encoded by the DMD gene. The role of small dystrophin isoforms is not well investigated yet, and they may play a role in muscle development and molecular pathology. Here, we investigated the nuclear localization of short carboxy-terminal dystrophin isoforms during the in vitro differentiation of human, porcine, and murine myoblast cultures. We could not only confirm the presence of Dp71 in the nucleoplasm and at the nuclear envelope, but we could also identify the Dp40 isoform in muscle nuclei. The localization of both isoforms over the first six days of differentiation was similar between human and porcine myoblasts, but murine myoblasts behaved differently. This highlights the importance of the porcine model in investigating DMD. We could also detect a wave-like pattern of nuclear presence of both Dp71 and Dp40, indicating a direct or indirect involvement in gene expression control during muscle differentiation.
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Affiliation(s)
- Tina Donandt
- Friedrich-Baur-Institute at the Department of Neurology, LMU University Hospital, Ludwig Maximilians University, 81377 Munich, Germany
| | - Vanessa Todorow
- Friedrich-Baur-Institute at the Department of Neurology, LMU University Hospital, Ludwig Maximilians University, 81377 Munich, Germany
| | - Stefan Hintze
- Friedrich-Baur-Institute at the Department of Neurology, LMU University Hospital, Ludwig Maximilians University, 81377 Munich, Germany
| | - Alexandra Graupner
- Friedrich-Baur-Institute at the Department of Neurology, LMU University Hospital, Ludwig Maximilians University, 81377 Munich, Germany
| | - Benedikt Schoser
- Friedrich-Baur-Institute at the Department of Neurology, LMU University Hospital, Ludwig Maximilians University, 81377 Munich, Germany
| | - Maggie C Walter
- Friedrich-Baur-Institute at the Department of Neurology, LMU University Hospital, Ludwig Maximilians University, 81377 Munich, Germany
| | - Peter Meinke
- Friedrich-Baur-Institute at the Department of Neurology, LMU University Hospital, Ludwig Maximilians University, 81377 Munich, Germany
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Barboni MTS, Joachimsthaler A, Roux MJ, Nagy ZZ, Ventura DF, Rendon A, Kremers J, Vaillend C. Retinal dystrophins and the retinopathy of Duchenne muscular dystrophy. Prog Retin Eye Res 2022:101137. [DOI: 10.1016/j.preteyeres.2022.101137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 10/25/2022] [Accepted: 11/03/2022] [Indexed: 11/21/2022]
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