1
|
Lopergolo D, Gallus GN, Pieraccini G, Boscaro F, Berti G, Serni G, Volpi N, Formichi P, Bianchi S, Cassandrini D, Sorrentino V, Rossi D, Santorelli FM, De Stefano N, Malandrini A. CCDC78: Unveiling the Function of a Novel Gene Associated with Hereditary Myopathy. Cells 2024; 13:1504. [PMID: 39273074 PMCID: PMC11394131 DOI: 10.3390/cells13171504] [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: 07/21/2024] [Revised: 09/03/2024] [Accepted: 09/04/2024] [Indexed: 09/15/2024] Open
Abstract
CCDC78 was identified as a novel candidate gene for autosomal dominant centronuclear myopathy-4 (CNM4) approximately ten years ago. However, to date, only one family has been described, and the function of CCDC78 remains unclear. Here, we analyze for the first time a family harboring a CCDC78 nonsense mutation to better understand the role of CCDC78 in muscle. METHODS We conducted a comprehensive histopathological analysis on muscle biopsies, including immunofluorescent assays to detect multiple sarcoplasmic proteins. We examined CCDC78 transcripts and protein using WB in CCDC78-mutated muscle tissue; these analyses were also performed on muscle, lymphocytes, and fibroblasts from healthy subjects. Subsequently, we conducted RT-qPCR and transcriptome profiling through RNA-seq to evaluate changes in gene expression associated with CCDC78 dysfunction in muscle. Lastly, coimmunoprecipitation (Co-Ip) assays and mass spectrometry (LC-MS/MS) studies were carried out on extracted muscle proteins from both healthy and mutated subjects. RESULTS The histopathological features in muscle showed novel histological hallmarks, which included areas of dilated and swollen sarcoplasmic reticulum (SR). We provided evidence of nonsense-mediated mRNA decay (NMD), identified the presence of novel CCDC78 transcripts in muscle and lymphocytes, and identified 1035 muscular differentially expressed genes, including several involved in the SR. Through the Co-Ip assays and LC-MS/MS studies, we demonstrated that CCDC78 interacts with two key SR proteins: SERCA1 and CASQ1. We also observed interactions with MYH1, ACTN2, and ACTA1. CONCLUSIONS Our findings provide insight, for the first time, into the interactors and possible role of CCDC78 in skeletal muscle, locating the protein in the SR. Furthermore, our data expand on the phenotype previously associated with CCDC78 mutations, indicating potential histopathological hallmarks of the disease in human muscle. Based on our data, we can consider CCDC78 as the causative gene for CNM4.
Collapse
Affiliation(s)
- Diego Lopergolo
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
- UOC Neurologia, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Gian Nicola Gallus
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
- UOC Neurologia, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Giuseppe Pieraccini
- CISM-Mass Spectrometry Centre, University of Florence, 50139 Florence, Italy
| | - Francesca Boscaro
- CISM-Mass Spectrometry Centre, University of Florence, 50139 Florence, Italy
| | - Gianna Berti
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
- UOC Neurologia, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Giovanni Serni
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
- UOC Neurologia, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Nila Volpi
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
- UOC Neurologia, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Patrizia Formichi
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
- UOC Neurologia, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Silvia Bianchi
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
- UOC Neurologia, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Denise Cassandrini
- Molecular Medicine for Neurodegenerative and Neuromuscular Diseases Unit, IRCCS Stella Maris Foundation, 56128 Pisa, Italy
| | - Vincenzo Sorrentino
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
- Interdepartmental Program of Molecular Diagnosis and Pathogenetic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Daniela Rossi
- Department of Molecular and Developmental Medicine, University of Siena, 53100 Siena, Italy
- Interdepartmental Program of Molecular Diagnosis and Pathogenetic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Filippo Maria Santorelli
- Molecular Medicine for Neurodegenerative and Neuromuscular Diseases Unit, IRCCS Stella Maris Foundation, 56128 Pisa, Italy
| | - Nicola De Stefano
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
- UOC Neurologia, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| | - Alessandro Malandrini
- Department of Medicine, Surgery and Neurosciences, University of Siena, 53100 Siena, Italy
- UOC Neurologia, Azienda Ospedaliero-Universitaria Senese, 53100 Siena, Italy
| |
Collapse
|
2
|
Piga D, Rimoldi M, Magri F, Zanotti S, Napoli L, Ripolone M, Pagliarani S, Ciscato P, Velardo D, D’Amico A, Bertini E, Comi GP, Ronchi D, Corti S. Case report: A novel ACTA1 variant in a patient with nemaline rods and increased glycogen deposition. Front Neurol 2024; 15:1340693. [PMID: 38500810 PMCID: PMC10944937 DOI: 10.3389/fneur.2024.1340693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 02/22/2024] [Indexed: 03/20/2024] Open
Abstract
Background Congenital myopathies are a group of heterogeneous inherited disorders, mainly characterized by early-onset hypotonia and muscle weakness. The spectrum of clinical phenotype can be highly variable, going from very mild to severe presentations. The course also varies broadly resulting in a fatal outcome in the most severe cases but can either be benign or lead to an amelioration even in severe presentations. Muscle biopsy analysis is crucial for the identification of pathognomonic morphological features, such as core areas, nemaline bodies or rods, nuclear centralizations and congenital type 1 fibers disproportion. However, multiple abnormalities in the same muscle can be observed, making more complex the myopathological scenario. Case presentation Here, we describe an Italian newborn presenting with severe hypotonia, respiratory insufficiency, inability to suck and swallow, requiring mechanical ventilation and gastrostomy feeding. Muscle biopsy analyzed by light microscopy showed the presence of vacuoles filled with glycogen, suggesting a metabolic myopathy, but also fuchsinophilic inclusions. Ultrastructural studies confirmed the presence of normally structured glycogen, and the presence of minirods, directing the diagnostic hypothesis toward a nemaline myopathy. An expanded Next Generation Sequencing analysis targeting congenital myopathies genes revealed the presence of a novel heterozygous c.965 T > A p. (Leu322Gln) variant in the ACTA1 gene, which encodes the skeletal muscle alpha-actin. Conclusion Our case expands the repertoire of molecular and pathological features observed in actinopathies. We highlight the value of ultrastructural examination to investigate the abnormalities detected at the histological level. We also emphasized the use of expanded gene panels in the molecular analysis of neuromuscular patients, especially for those ones presenting multiple bioptic alterations.
Collapse
Affiliation(s)
- Daniela Piga
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy
| | - Martina Rimoldi
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neuromuscular and Rare Disease Unit, Milan, Italy
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Medical Genetics Unit, Milan, Italy
| | - Francesca Magri
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy
| | - Simona Zanotti
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neuromuscular and Rare Disease Unit, Milan, Italy
| | - Laura Napoli
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neuromuscular and Rare Disease Unit, Milan, Italy
| | - Michela Ripolone
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neuromuscular and Rare Disease Unit, Milan, Italy
| | - Serena Pagliarani
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy
| | - Patrizia Ciscato
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neuromuscular and Rare Disease Unit, Milan, Italy
| | - Daniele Velardo
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neuromuscular and Rare Disease Unit, Milan, Italy
| | - Adele D’Amico
- Unit of Neuromuscular and Neurodegenerative Disorders, Bambino Gesu’ Children’s Research Hospital, IRCCS, Rome, Italy
| | - Enrico Bertini
- Unit of Neuromuscular and Neurodegenerative Disorders, Bambino Gesu’ Children’s Research Hospital, IRCCS, Rome, Italy
| | - Giacomo Pietro Comi
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy
- Department of Pathophysiology and Transplantation, Dino Ferrari Center, University of Milan, Milan, Italy
| | - Dario Ronchi
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neurology Unit, Milan, Italy
- Department of Pathophysiology and Transplantation, Dino Ferrari Center, University of Milan, Milan, Italy
| | - Stefania Corti
- IRCCS Fondazione Cà Granda Ospedale Maggiore Policlinico, Neuromuscular and Rare Disease Unit, Milan, Italy
- Department of Pathophysiology and Transplantation, Dino Ferrari Center, University of Milan, Milan, Italy
| |
Collapse
|
3
|
Lehtonen J, Sulonen AM, Almusa H, Lehtokari VL, Johari M, Palva A, Hakonen AH, Wartiovaara K, Lehesjoki AE, Udd B, Wallgren-Pettersson C, Pelin K, Savarese M, Saarela J. Haplotype information of large neuromuscular disease genes provided by linked-read sequencing has a potential to increase diagnostic yield. Sci Rep 2024; 14:4306. [PMID: 38383731 PMCID: PMC10881483 DOI: 10.1038/s41598-024-54866-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 02/17/2024] [Indexed: 02/23/2024] Open
Abstract
Rare or novel missense variants in large genes such as TTN and NEB are frequent in the general population, which hampers the interpretation of putative disease-causing biallelic variants in patients with sporadic neuromuscular disorders. Often, when the first initial genetic analysis is performed, the reconstructed haplotype, i.e. phasing information of the variants is missing. Segregation analysis increases the diagnostic turnaround time and is not always possible if samples from family members are lacking. To overcome this difficulty, we investigated how well the linked-read technology succeeded to phase variants in these large genes, and whether it improved the identification of structural variants. Linked-read sequencing data of nemaline myopathy, distal myopathy, and proximal myopathy patients were analyzed for phasing, single nucleotide variants, and structural variants. Variant phasing was successful in the large muscle genes studied. The longest continuous phase blocks were gained using high-quality DNA samples with long DNA fragments. Homozygosity increased the number of phase blocks, especially in exome sequencing samples lacking intronic variation. In our cohort, linked-read sequencing added more information about the structural variation but did not lead to a molecular genetic diagnosis. The linked-read technology can support the clinical diagnosis of neuromuscular and other genetic disorders.
Collapse
Affiliation(s)
- Johanna Lehtonen
- Centre for Molecular Medicine Norway (NCMM), University of Oslo, Oslo, Norway
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, Helsinki, Finland
- Folkhälsan Research Center, Folkhälsan Institute of Genetics, Helsinki, Finland
- Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Anna-Maija Sulonen
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, Helsinki, Finland
| | - Henrikki Almusa
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, Helsinki, Finland
| | - Vilma-Lotta Lehtokari
- Folkhälsan Research Center, Folkhälsan Institute of Genetics, Helsinki, Finland
- Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Mridul Johari
- Folkhälsan Research Center, Folkhälsan Institute of Genetics, Helsinki, Finland
- Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Harry Perkins Institute of Medical Research, Centre for Medical Research, University of Western Australia, Nedlands, WA, Australia
| | - Aino Palva
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, Helsinki, Finland
| | - Anna H Hakonen
- Clinical Genetics, Helsinki University Hospital, Helsinki, Finland
| | | | - Anna-Elina Lehesjoki
- Folkhälsan Research Center, Folkhälsan Institute of Genetics, Helsinki, Finland
- Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Bjarne Udd
- Folkhälsan Research Center, Folkhälsan Institute of Genetics, Helsinki, Finland
- Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Carina Wallgren-Pettersson
- Folkhälsan Research Center, Folkhälsan Institute of Genetics, Helsinki, Finland
- Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Katarina Pelin
- Folkhälsan Research Center, Folkhälsan Institute of Genetics, Helsinki, Finland
- Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
- Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Marco Savarese
- Folkhälsan Research Center, Folkhälsan Institute of Genetics, Helsinki, Finland
- Medicum, Faculty of Medicine, University of Helsinki, Helsinki, Finland
| | - Janna Saarela
- Centre for Molecular Medicine Norway (NCMM), University of Oslo, Oslo, Norway.
- Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, Helsinki, Finland.
- Department of Medical Genetics, Oslo University Hospital, Oslo, Norway.
| |
Collapse
|
4
|
Liu Y, Lin W. Morphological and functional alterations of neuromuscular synapses in a mouse model of ACTA1 congenital myopathy. Hum Mol Genet 2024; 33:233-244. [PMID: 37883471 PMCID: PMC10800017 DOI: 10.1093/hmg/ddad183] [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: 05/11/2023] [Revised: 10/09/2023] [Accepted: 10/20/2023] [Indexed: 10/28/2023] Open
Abstract
Mutations in skeletal muscle α-actin (Acta1) cause myopathies. In a mouse model of congenital myopathy, heterozygous Acta1 (H40Y) knock-in (Acta1+/Ki) mice exhibit features of human nemaline myopathy, including premature lethality, severe muscle weakness, reduced mobility, and the presence of nemaline rods in muscle fibers. In this study, we investigated the impact of Acta1 (H40Y) mutation on the neuromuscular junction (NMJ). We found that the NMJs were markedly fragmented in Acta1+/Ki mice. Electrophysiological analysis revealed a decrease in amplitude but increase in frequency of miniature end-plate potential (mEPP) at the NMJs in Acta1+/Ki mice, compared with those in wild type (Acta1+/+) mice. Evoked end-plate potential (EPP) remained similar at the NMJs in Acta1+/Ki and Acta1+/+ mice, but quantal content was increased at the NMJs in Acta1+/Ki, compared with Acta1+/+ mice, suggesting a homeostatic compensation at the NMJs in Acta1+/Ki mice to maintain normal levels of neurotransmitter release. Furthermore, short-term synaptic plasticity of the NMJs was compromised in Acta1+/Ki mice. Together, these results demonstrate that skeletal Acta1 H40Y mutation, albeit muscle-origin, leads to both morphological and functional defects at the NMJ.
Collapse
Affiliation(s)
- Yun Liu
- Department of Neuroscience, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd, Dallas, TX 75390-9111, United States
| | - Weichun Lin
- Department of Neuroscience, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd, Dallas, TX 75390-9111, United States
| |
Collapse
|
5
|
Lehtokari VL, Sagath L, Davis M, Ho D, Kiiski K, Kettunen K, Demczko M, Stein R, Vatta M, Winder TL, Shohet A, Orenstein N, Krcho P, Bohuš P, Huovinen S, Udd B, Pelin K, Laing NG, Wallgren-Pettersson C. A recurrent ACTA1 amino acid change in mosaic form causes milder asymmetric myopathy. Neuromuscul Disord 2024; 34:32-40. [PMID: 38142473 DOI: 10.1016/j.nmd.2023.11.009] [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: 06/27/2023] [Revised: 10/25/2023] [Accepted: 11/26/2023] [Indexed: 12/26/2023]
Abstract
We describe three patients with asymmetric congenital myopathy without definite nemaline bodies and one patient with severe nemaline myopathy. In all four patients, the phenotype had been caused by pathogenic missense variants in ACTA1 leading to the same amino acid change, p.(Gly247Arg). The three patients with milder myopathy were mosaic for their variants. In contrast, in the severely affected patient, the missense variant was present in a de novo, constitutional form. The grade of mosaicism in the three mosaic patients ranged between 20 % and 40 %. We speculate that the milder clinical and histological manifestations of the same ACTA1 variant in the patients with mosaicism reflect the lower abundance of mutant actin in their muscle tissue. Similarly, the asymmetry of body growth and muscle weakness may be a consequence of the affected cells being unevenly distributed. The partial improvement in muscle strength with age in patients with mosaicism might be due to an increased proportion over time of nuclei carrying and expressing two normal alleles.
Collapse
Affiliation(s)
- Vilma-Lotta Lehtokari
- Folkhälsan Research Center, 00290 Helsinki, Finland; Department of Medical and Clinical Genetics, Medicum, 00014 University of Helsinki, Finland.
| | - Lydia Sagath
- Folkhälsan Research Center, 00290 Helsinki, Finland; Department of Medical and Clinical Genetics, Medicum, 00014 University of Helsinki, Finland
| | - Mark Davis
- Department of Diagnostic Genomics, PathWest Laboratory Medicine WA, Nedlands WA 6009, SA
| | - Desiree Ho
- Department of Diagnostic Genomics, PathWest Laboratory Medicine WA, Nedlands WA 6009, SA
| | - Kirsi Kiiski
- Folkhälsan Research Center, 00290 Helsinki, Finland; Laboratory of Genetics, Division of Genetics and Clinical Pharmacology, HUS Diagnostic Center, 00029 Helsinki University Hospital and 00014 University of Helsinki, Helsinki, Finland
| | - Kaisa Kettunen
- Laboratory of Genetics, Division of Genetics and Clinical Pharmacology, HUS Diagnostic Center, 00029 Helsinki University Hospital and 00014 University of Helsinki, Helsinki, Finland
| | - Matthew Demczko
- Division of Diagnostic Referral Services, Nemours Children's Hospital, Wilmington, DE 19803, United States
| | - Riki Stein
- Genetics Unit, Schneider Children's Medical Center, Petach Tikva 4920235, Israel
| | - Matteo Vatta
- Invitae Corporation, San Francisco, CA 94103, United States
| | | | - Adi Shohet
- Genetics Unit, Schneider Children's Medical Center, Petach Tikva 4920235, Israel
| | - Naama Orenstein
- Genetics Unit, Schneider Children's Medical Center, Petach Tikva 4920235, Israel; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Peter Krcho
- Department of Neonatology, Pavol Jozef Safarik University, 041 80 Košice, Slovakia
| | - Peter Bohuš
- Department of Pathology, L. Pasteur University Hospital, 040 11 Košice, Slovakia
| | - Sanna Huovinen
- Department of Pathology, Fimlab Laboratories, Tampere University Hospital, 33101 Tampere, Finland
| | - Bjarne Udd
- Folkhälsan Research Center, 00290 Helsinki, Finland; Neuromuscular Research Center, Department of Neurology, Tampere University and University Hospital, 33520 Tampere, Finland; Department of Neurology, Vaasa Central Hospital, 65130 Vaasa, Finland
| | - Katarina Pelin
- Folkhälsan Research Center, 00290 Helsinki, Finland; Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, 00014 University of Helsinki, Finland
| | - Nigel G Laing
- Department of Diagnostic Genomics, PathWest Laboratory Medicine WA, Nedlands WA 6009, SA; Harry Perkins Institute of Medical Research, and University of Western Australia Centre for Medical Research, Nedlands Western Australia 6009, Australia
| | - Carina Wallgren-Pettersson
- Folkhälsan Research Center, 00290 Helsinki, Finland; Department of Medical and Clinical Genetics, Medicum, 00014 University of Helsinki, Finland
| |
Collapse
|
6
|
Huang K, Li Z, Zhong D, Yang Y, Yan X, Feng T, Wang X, Zhang L, Shen X, Chen M, Luo X, Cui K, Huang J, Rehman SU, Jiang Y, Shi D, Pauciullo A, Tang X, Liu Q, Li H. A Circular RNA Generated from Nebulin (NEB) Gene Splicing Promotes Skeletal Muscle Myogenesis in Cattle as Detected by a Multi-Omics Approach. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2300702. [PMID: 38036415 PMCID: PMC10797441 DOI: 10.1002/advs.202300702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 10/16/2023] [Indexed: 12/02/2023]
Abstract
Cattle and the draught force provided by its skeletal muscle have been integral to agro-ecosystems of agricultural civilization for millennia. However, relatively little is known about the cattle muscle functional genomics (including protein coding genes, non-coding RNA, etc.). Circular RNAs (circRNAs), as a new class of non-coding RNAs, can be effectively translated into detectable peptides, which enlightened us on the importance of circRNAs in cattle muscle physiology function. Here, RNA-seq, Ribosome profiling (Ribo-seq), and peptidome data are integrated from cattle skeletal muscle, and detected five encoded peptides from circRNAs. It is further identified and functionally characterize a 907-amino acids muscle-specific peptide that is named circNEB-peptide because derived by the splicing of Nebulin (NEB) gene. This peptide localizes to the nucleus and cytoplasm and directly interacts with SKP1 and TPM1, key factors regulating physiological activities of myoblasts, via ubiquitination and myoblast fusion, respectively. The circNEB-peptide is found to promote myoblasts proliferation and differentiation in vitro, and induce muscle regeneration in vivo. These findings suggest circNEB-peptide is an important regulator of skeletal muscle regeneration and underscore the possibility that more encoding polypeptides derived by RNAs currently annotated as non-coding exist.
Collapse
Affiliation(s)
- Kongwei Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and EngineeringFoshan UniversityFoshan528225China
- School of Biology and Biological EngineeringSouth China University of TechnologyGuangzhou510641China
| | - Zhipeng Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Dandan Zhong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Yufeng Yang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Xiuying Yan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Tong Feng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Xiaobo Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Liyin Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Xinyue Shen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Mengjie Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Xier Luo
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and EngineeringFoshan UniversityFoshan528225China
| | - Kuiqing Cui
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and EngineeringFoshan UniversityFoshan528225China
| | - Jieping Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Saif Ur Rehman
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Yu Jiang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and TechnologyNorthwest A&F UniversityYangling712100China
| | - Deshun Shi
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| | - Alfredo Pauciullo
- Department of Agricultural, Forest and Food SciencesUniversity of TorinoGrugliasco (TO)10095Italy
| | - Xiangfang Tang
- State Key Laboratory of Animal Nutrition and Feeding,Institute of Animal SciencesChinese Academy of Agricultural SciencesBeijing100193China
| | - Qingyou Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
- Guangdong Provincial Key Laboratory of Animal Molecular Design and Precise Breeding, School of Life Science and EngineeringFoshan UniversityFoshan528225China
| | - Hui Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, College of Animal Science and TechnologyGuangxi UniversityNanning530005China
| |
Collapse
|
7
|
Tinklenberg JA, Slick RA, Sutton J, Zhang L, Meng H, Beatka MJ, Vanden Avond M, Prom MJ, Ott E, Montanaro F, Heisner J, Toro R, Hardeman EC, Geurts AM, Stowe DF, Hill RB, Lawlor MW. Different Mouse Models of Nemaline Myopathy Harboring Acta1 Mutations Display Differing Abnormalities Related to Mitochondrial Biology. THE AMERICAN JOURNAL OF PATHOLOGY 2023; 193:1548-1567. [PMID: 37419385 PMCID: PMC10548277 DOI: 10.1016/j.ajpath.2023.06.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 06/20/2023] [Accepted: 06/23/2023] [Indexed: 07/09/2023]
Abstract
ACTA1 encodes skeletal muscle-specific α-actin, which polymerizes to form the thin filament of the sarcomere. Mutations in ACTA1 are responsible for approximately 30% of nemaline myopathy (NM) cases. Previous studies of weakness in NM have focused on muscle structure and contractility, but genetic issues alone do not explain the phenotypic heterogeneity observed in patients with NM or NM mouse models. To identify additional biological processes related to NM phenotypic severity, proteomic analysis was performed using muscle protein isolates from wild-type mice in comparison to moderately affected knock-in (KI) Acta1H40Y and the minimally affected transgenic (Tg) ACTA1D286G NM mice. This analysis revealed abnormalities in mitochondrial function and stress-related pathways in both mouse models, supporting an in-depth assessment of mitochondrial biology. Interestingly, evaluating each model in comparison to its wild-type counterpart identified different degrees of mitochondrial abnormality that correlated well with the phenotypic severity of the mouse model. Muscle histology, mitochondrial respiration, electron transport chain function, and mitochondrial transmembrane potential were all normal or minimally affected in the TgACTA1D286G mouse model. In contrast, the more severely affected KI.Acta1H40Y mice displayed significant abnormalities in relation to muscle histology, mitochondrial respirometry, ATP, ADP, and phosphate content, and mitochondrial transmembrane potential. These findings suggest that abnormal energy metabolism is related to symptomatic severity in NM and may constitute a contributor to phenotypic variability and a novel treatment target.
Collapse
Affiliation(s)
- Jennifer A Tinklenberg
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin; Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Clinical and Translational Science Institute, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Rebecca A Slick
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin; Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Clinical and Translational Science Institute, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jessica Sutton
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Liwen Zhang
- Mass Spectrometry and Proteomics Facility, Campus Chemical Instrument Center, The Ohio State University, Columbus, Ohio
| | - Hui Meng
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Margaret J Beatka
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Mark Vanden Avond
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin; Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Mariah J Prom
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Emily Ott
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Federica Montanaro
- Dubowitz Neuromuscular Centre, Molecular Neurosciences Section, Developmental Neuroscience Research and Teaching Department, UCL Great Ormond Street Institute of Child Health, London, United Kingdom; NIHR Great Ormond Street Hospital Biomedical Research Centre, London, United Kingdom
| | - James Heisner
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Rafael Toro
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Edna C Hardeman
- School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Aron M Geurts
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Mellowes Center for Genomic Sciences and Precision Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - David F Stowe
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin; Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - R Blake Hill
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Michael W Lawlor
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin; Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin.
| |
Collapse
|
8
|
Steffensen KE, Dawson JF. Actin's C-terminus coordinates actin structural changes and functions. Cytoskeleton (Hoboken) 2023; 80:313-329. [PMID: 37036084 DOI: 10.1002/cm.21757] [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: 10/31/2022] [Revised: 03/17/2023] [Accepted: 03/30/2023] [Indexed: 04/11/2023]
Abstract
Actin is essential to eukaryotic cellular processes. Actin's C-terminus appears to play a direct role in modulating actin's structure and properties, facilitating the binding and function of actin-binding proteins (ABPs). The structural and functional characterization of filamentous actin's C-terminus has been impeded by its inherent flexibility, as well as actin's resistance to crystallization for x-ray diffraction and the historical resolution constraints associated with electron microscopy. Many biochemical studies have established that actin's C-terminus must retain its flexibility and structural integrity to modulate actin's structure and functions. For example, C-terminal structural changes are known to affect nucleotide binding and exchange, as well as propagate actin structural changes throughout extensive allosteric networks, facilitating the binding and function of ABPs. Advances in electron microscopy have resulted in high-resolution structures of filamentous actin, providing insights into subtle structural changes that are mediated by actin's C-terminus. Here, we review existing knowledge establishing the importance of actin's C-terminus within actin structural changes and functions and discuss how modern structural characterization techniques provide the tools to understand the role of actin's C-terminus in cellular processes.
Collapse
Affiliation(s)
- Karl E Steffensen
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| | - John F Dawson
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| |
Collapse
|
9
|
Chong JX, Childers MC, Marvin CT, Marcello AJ, Gonorazky H, Hazrati LN, Dowling JJ, Al Amrani F, Alanay Y, Nieto Y, Gabriel MÁM, Aylsworth AS, Buckingham KJ, Shively KM, Sommers O, Anderson K, Regnier M, Bamshad MJ. Variants in ACTC1 underlie distal arthrogryposis accompanied by congenital heart defects. HGG ADVANCES 2023; 4:100213. [PMID: 37457373 PMCID: PMC10345160 DOI: 10.1016/j.xhgg.2023.100213] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 06/12/2023] [Indexed: 07/18/2023] Open
Abstract
Contraction of the human sarcomere is the result of interactions between myosin cross-bridges and actin filaments. Pathogenic variants in genes such as MYH7, TPM1, and TNNI3 that encode parts of the cardiac sarcomere cause muscle diseases that affect the heart, such as dilated cardiomyopathy and hypertrophic cardiomyopathy. In contrast, pathogenic variants in homologous genes such as MYH2, TPM2, and TNNI2 that encode parts of the skeletal muscle sarcomere cause muscle diseases affecting skeletal muscle, such as distal arthrogryposis (DA) syndromes and skeletal myopathies. To date, there have been few reports of genes (e.g., MYH7) encoding sarcomeric proteins in which the same pathogenic variant affects skeletal and cardiac muscle. Moreover, none of the known genes underlying DA have been found to contain pathogenic variants that also cause cardiac abnormalities. We report five families with DA because of heterozygous missense variants in the gene actin, alpha, cardiac muscle 1 (ACTC1). ACTC1 encodes a highly conserved actin that binds to myosin in cardiac and skeletal muscle. Pathogenic variants in ACTC1 have been found previously to underlie atrial septal defect, dilated cardiomyopathy, hypertrophic cardiomyopathy, and left ventricular noncompaction. Our discovery delineates a new DA condition because of variants in ACTC1 and suggests that some functions of ACTC1 are shared in cardiac and skeletal muscle.
Collapse
Affiliation(s)
- Jessica X. Chong
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
- Brotman-Baty Institute, Seattle, WA 98195, USA
| | - Matthew Carter Childers
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- University of Washington Center for Translational Muscle Research, Seattle, WA 98195, USA
| | - Colby T. Marvin
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Anthony J. Marcello
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Hernan Gonorazky
- Division of Neurology, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
| | - Lili-Naz Hazrati
- Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
| | - James J. Dowling
- Division of Neurology, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
- Departments of Paediatrics and Molecular Genetics, University of Toronto, Toronto, ON M5G 0A4, Canada
| | - Fatema Al Amrani
- Division of Neurology, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
- Division of Neurology, Department of Pediatrics, Sultan Qaboos University Hospital, Sultan Qaboos University, Muscat, Sultanate of Oman
| | - Yasemin Alanay
- Division of Pediatric Genetics, Department of Pediatrics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, 34752 Istanbul, Turkey
| | - Yolanda Nieto
- Department of Basic Bio-Medical Sciences, European University of Madrid, Madrid, Spain
| | - Miguel Á Marín Gabriel
- Department of Pediatrics, Puerta de Hierro-Majadahonda University Hospital, 28221 Madrid, Spain
| | - Arthur S. Aylsworth
- Departments of Pediatrics and Genetics, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Kati J. Buckingham
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Kathryn M. Shively
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Olivia Sommers
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Kailyn Anderson
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - University of Washington Center for Mendelian Genomics
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
- Brotman-Baty Institute, Seattle, WA 98195, USA
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- University of Washington Center for Translational Muscle Research, Seattle, WA 98195, USA
- Division of Neurology, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
- Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
- Departments of Paediatrics and Molecular Genetics, University of Toronto, Toronto, ON M5G 0A4, Canada
- Division of Neurology, Department of Pediatrics, Sultan Qaboos University Hospital, Sultan Qaboos University, Muscat, Sultanate of Oman
- Division of Pediatric Genetics, Department of Pediatrics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, 34752 Istanbul, Turkey
- Department of Basic Bio-Medical Sciences, European University of Madrid, Madrid, Spain
- Department of Pediatrics, Puerta de Hierro-Majadahonda University Hospital, 28221 Madrid, Spain
- Departments of Pediatrics and Genetics, University of North Carolina, Chapel Hill, NC 27599, USA
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
- Seattle Children’s Hospital, Seattle, WA 98105, USA
| | - University of Washington Center for Rare Disease Research
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
- Brotman-Baty Institute, Seattle, WA 98195, USA
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- University of Washington Center for Translational Muscle Research, Seattle, WA 98195, USA
- Division of Neurology, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
- Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada
- Departments of Paediatrics and Molecular Genetics, University of Toronto, Toronto, ON M5G 0A4, Canada
- Division of Neurology, Department of Pediatrics, Sultan Qaboos University Hospital, Sultan Qaboos University, Muscat, Sultanate of Oman
- Division of Pediatric Genetics, Department of Pediatrics, School of Medicine, Acibadem Mehmet Ali Aydinlar University, 34752 Istanbul, Turkey
- Department of Basic Bio-Medical Sciences, European University of Madrid, Madrid, Spain
- Department of Pediatrics, Puerta de Hierro-Majadahonda University Hospital, 28221 Madrid, Spain
- Departments of Pediatrics and Genetics, University of North Carolina, Chapel Hill, NC 27599, USA
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
- Seattle Children’s Hospital, Seattle, WA 98105, USA
| | - Michael Regnier
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- University of Washington Center for Translational Muscle Research, Seattle, WA 98195, USA
| | - Michael J. Bamshad
- Division of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
- Brotman-Baty Institute, Seattle, WA 98195, USA
- University of Washington Center for Translational Muscle Research, Seattle, WA 98195, USA
- Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA
- Seattle Children’s Hospital, Seattle, WA 98105, USA
| |
Collapse
|
10
|
Mulvany-Robbins B, Putko B, Schmitt L, Oudit G, Phan C, Beecher G. Novel p.Asp27Glu ACTA1 variant features congenital myopathy with finger flexor weakness, cardiomyopathy, and cardiac conduction defects. Neuromuscul Disord 2023; 33:546-550. [PMID: 37315422 DOI: 10.1016/j.nmd.2023.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 05/25/2023] [Accepted: 05/29/2023] [Indexed: 06/16/2023]
Abstract
Pathogenic variants in the skeletal muscle α-actin 1 gene (ACTA1) cause a spectrum of myopathies with clinical and myopathological diversity. Clinical presentations occur from the prenatal period to adulthood, commonly with proximal-predominant weakness and rarely preferential distal weakness. Myopathological findings are wide-ranging, with nemaline rods being most frequent. Associated cardiomyopathy is rare and conduction defects are not reported. We describe a family with congenital myopathy with prominent finger flexor weakness and cardiomyopathy with cardiac conduction defects. The proband, a 48-year-old Caucasian male, his 73-year-old mother, 41-year-old sister, and 19-year-old nephew presented with prominent finger flexor weakness on a background of neonatal hypotonia and delayed motor milestones. All had progressive cardiomyopathy with systolic dysfunction and/or left ventricular dilation. The proband and sister had intraventricular conduction delay and left anterior fascicular block, respectively. The mother had atrial fibrillation. Muscle biopsy in the proband and sister demonstrated congenital fiber-type disproportion and rare nemaline rods in the proband. A novel dominant variant in ACTA1 (c.81C>A, p.Asp27Glu) segregated within the family. This family expands the genotypic and phenotypic spectrum of ACTA1-related myopathy, highlighting preferential finger flexor involvement with cardiomyopathy and conduction disease. We emphasize early and ongoing cardiac surveillance in ACTA1-related myopathy.
Collapse
Affiliation(s)
- Bridget Mulvany-Robbins
- Division of Neurology, Department of Medicine, University of Alberta, 7-125 Clinical Sciences Building 11350 83rd Avenue NW, Edmonton, AB, Canada T6G 2G3
| | - Brendan Putko
- Division of Neurology, Department of Medicine, University of Alberta, 7-125 Clinical Sciences Building 11350 83rd Avenue NW, Edmonton, AB, Canada T6G 2G3
| | - Laura Schmitt
- Section of Neuropathology, Department of Laboratory Medicine and Pathology, University of Alberta, 8440 112St NW, Edmonton, AB, Canada T6G 2B7
| | - Gavin Oudit
- Division of Cardiology, Department of Medicine, Mazankowski Alberta Health Institute, 11220 83 Ave NW, Edmonton, AB T6G 2B7
| | - Cecile Phan
- Division of Neurology, Department of Medicine, University of Alberta, 7-125 Clinical Sciences Building 11350 83rd Avenue NW, Edmonton, AB, Canada T6G 2G3
| | - Grayson Beecher
- Division of Neurology, Department of Medicine, University of Alberta, 7-125 Clinical Sciences Building 11350 83rd Avenue NW, Edmonton, AB, Canada T6G 2G3.
| |
Collapse
|
11
|
Chong JX, Childers MC, Marvin CT, Marcello AJ, Gonorazky H, Hazrati LN, Dowling JJ, Amrani FA, Alanay Y, Nieto Y, Marín Gabriel MÁ, Aylsworth AS, Buckingham KJ, Shively KM, Sommers O, Anderson K, Regnier M, Bamshad MJ. Variants in ACTC1 underlie distal arthrogryposis accompanied by congenital heart defects. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023. [PMID: 36945405 PMCID: PMC10029015 DOI: 10.1101/2023.03.07.23286862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Contraction of the human sarcomere is the result of interactions between myosin cross-bridges and actin filaments. Pathogenic variants in genes such as MYH7 , TPM1 , and TNNI3 that encode parts of the cardiac sarcomere cause muscle diseases that affect the heart, such as dilated cardiomyopathy and hypertrophic cardiomyopathy. In contrast, pathogenic variants in homologous genes MYH2 , TPM2 , and TNNI2 , that encode parts of the skeletal muscle sarcomere, cause muscle diseases affecting skeletal muscle, such as the distal arthrogryposis (DA) syndromes and skeletal myopathies. To date, there have been few reports of genes (e.g., MYH7 ) encoding sarcomeric proteins in which the same pathogenic variant affects both skeletal and cardiac muscle. Moreover, none of the known genes underlying DA have been found to contain mutations that also cause cardiac abnormalities. We report five families with DA due to heterozygous missense variants in the gene actin, alpha, cardiac muscle 1 ( ACTC1 ). ACTC1 encodes a highly conserved actin that binds to myosin in both cardiac and skeletal muscle. Mutations in ACTC1 have previously been found to underlie atrial septal defect, dilated cardiomyopathy, hypertrophic cardiomyopathy, and left ventricular noncompaction. Our discovery delineates a new DA condition due to mutations in ACTC1 and suggests that some functions of actin, alpha, cardiac muscle 1 are shared in cardiac and skeletal muscle.
Collapse
|
12
|
A review of major causative genes in congenital myopathies. J Hum Genet 2023; 68:215-225. [PMID: 35668205 DOI: 10.1038/s10038-022-01045-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 04/25/2022] [Accepted: 05/11/2022] [Indexed: 02/07/2023]
Abstract
In this review, we focus on congenital myopathies, which are a genetically heterogeneous group of hereditary muscle diseases with slow or minimal progression. They are mainly defined and classified according to pathological features, with the major subtypes being core myopathy (central core disease), nemaline myopathy, myotubular/centronuclear myopathy, and congenital fiber-type disproportion myopathy. Recent advances in molecular genetics, especially next-generation sequencing technology, have rapidly increased the number of known causative genes for congenital myopathies; however, most of the diseases related to the novel causative genes are extremely rare. There remains no cure for congenital myopathies. However, there have been recent promising findings that could inform the development of therapy for several types of congenital myopathies, including myotubular myopathy, which indicates the importance of prompt and correct diagnosis. This review discusses the major causative genes (NEB, ACTA1, ADSSL1, RYR1, SELENON, MTM1, DNM2, and TPM3) for each subtype of congenital myopathies and the relevant latest findings.
Collapse
|
13
|
Glyakina AV, Galzitskaya OV. Structural and functional analysis of actin point mutations leading to nemaline myopathy to elucidate their role in actin function. Biophys Rev 2022; 14:1527-1538. [PMID: 36659996 PMCID: PMC9842827 DOI: 10.1007/s12551-022-01027-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/15/2022] [Indexed: 12/15/2022] Open
Abstract
In this work, we analyzed 78 mutations in the actin protein that cause the disease nemaline myopathy. We analyzed how these mutations are distributed in important regions of the actin molecule (folding nucleus, core of the filament, amyloidogenic regions, disordered regions, regions involved in interaction with other proteins). It was found that 54 mutations (43 residues) fall into the folding nucleus (Ф ≥ 0.5), 11 mutations (10 residues) into the filament core, 14 mutations into the amyloidogenic regions (11 residues), 14 mutations (9 residues) in the unstructured regions, and 24 mutations (22 residues) in regions involved in interaction with other proteins. It was also found that the occurrence of single mutations G44V, V45F, T68I, P72R, K338I and S350L leads to the appearance of new amyloidogenic regions that are not present in native actin. The largest number of mutations (54 out of 78) occurs in the folding nucleus; these mutations are important for folding and therefore can affect the protein folding rate. We have shown that almost all of the considered mutations are associated with the structural characteristics of the actin molecule, and some of the residues we have considered have several important characteristics.
Collapse
Affiliation(s)
- Anna V. Glyakina
- Institute of Protein Research, Russian Academy of Sciences, Pushchino, Russia ,Institute of Mathematical Problems of Biology RAS, Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, Pushchino, Russia
| | - Oxana V. Galzitskaya
- Institute of Protein Research, Russian Academy of Sciences, Pushchino, Russia ,Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, Russia
| |
Collapse
|
14
|
Transcriptome analysis of breast muscle and liver in full-sibling hybrid broilers at different ages. Gene 2022; 842:146801. [PMID: 35961440 DOI: 10.1016/j.gene.2022.146801] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/29/2022] [Accepted: 08/05/2022] [Indexed: 11/23/2022]
Abstract
In China, the production mode of hybrid broilers with meat-type chicken as male parent and egg-type chicken as female parent is common, but few studies pay attention to the economic characteristics of hybrid broilers. In this experiment, we constructed a full-sib F1 population (n = 57) from male Recursive White broiler and female Lohmann Pink layer. Total 6, 6 and 7 hybrid broilers at days 1, 28 and 56 were selected randomly to collect breast muscle and liver tissues, respectively. After performing strand-specific RNA-Seq on these samples, we obtained 252.12 Gb sequencing data. Principal component analysis presented that the effects of different factors on gene expression were as below: tissue difference > age difference > sex difference. The ten genes with the highest expression in breast muscle were GAPDH, ACTA1, ATP2B3, COII, ATP6, COX3, COX1, MYL1, TNNI2 and ENSGALG00000042024. Through the analysis of differentially expressed transcripts (DETs) between different ages, we found that the number of DETs decreased progressively with the prolongation of ages in breast muscle. The same results were also observed in liver. GO enrichment analysis of DETs demonstrated that total 11 BP terms closely related to growth and development of breast muscle were annotated, such as cardiac muscle contract, muscle contract, cell division and so on. KEGG annotation presented that total 5 pathways related to growth and development were determined in breast muscle, including Cell cycle, Insulin signaling pathway, FoxO signaling pathway, Focal adhesion and Adrenergic signaling in cardiomyocytes. Our results may provide theoretical foundation for hybrid broiler production.
Collapse
|
15
|
Nemaline Myopathy in Brazilian Patients: Molecular and Clinical Characterization. Int J Mol Sci 2022; 23:ijms231911995. [PMID: 36233295 PMCID: PMC9569467 DOI: 10.3390/ijms231911995] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/10/2022] [Accepted: 09/27/2022] [Indexed: 11/07/2022] Open
Abstract
Nemaline myopathy (NM), a structural congenital myopathy, presents a significant clinical and genetic heterogeneity. Here, we compiled molecular and clinical data of 30 Brazilian patients from 25 unrelated families. Next-generation sequencing was able to genetically classify all patients: sixteen families (64%) with mutation in NEB, five (20%) in ACTA1, two (8%) in KLHL40, and one in TPM2 (4%) and TPM3 (4%). In the NEB-related families, 25 different variants, 11 of them novel, were identified; splice site (10/25) and frame shift (9/25) mutations were the most common. Mutation c.24579 G>C was recurrent in three unrelated patients from the same region, suggesting a common ancestor. Clinically, the “typical” form was the more frequent and caused by mutations in the different NM genes. Phenotypic heterogeneity was observed among patients with mutations in the same gene. Respiratory involvement was very common and often out of proportion with limb weakness. Muscle MRI patterns showed variability within the forms and genes, which was related to the severity of the weakness. Considering the high frequency of NEB mutations and the complexity of this gene, NGS tools should be combined with CNV identification, especially in patients with a likely non-identified second mutation.
Collapse
|
16
|
Fisher G, Mackels L, Markati T, Sarkozy A, Ochala J, Jungbluth H, Ramdas S, Servais L. Early clinical and pre-clinical therapy development in Nemaline myopathy. Expert Opin Ther Targets 2022; 26:853-867. [PMID: 36524401 DOI: 10.1080/14728222.2022.2157258] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Nemaline myopathies (NM) represent a group of clinically and genetically heterogeneous congenital muscle disorders with the common denominator of nemaline rods on muscle biopsy. NEB and ACTA1 are the most common causative genes. Currently, available treatments are supportive. AREAS COVERED We explored experimental treatments for NM, identifying at least eleven mainly pre-clinical approaches utilizing murine and/or human muscle cells. These approaches target either i) the causative gene or associated genes implicated in the same pathway; ii) pathophysiologically relevant biochemical mechanisms such as calcium/myosin regulation of muscle contraction; iii) myogenesis; iv) other therapies that improve or optimize muscle function more generally; v) and/or combinations of the above. The scope and efficiency of these attempts is diverse, ranging from gene-specific effects to those widely applicable to all NM-associated genes. EXPERT OPINION The wide range of experimental therapies currently under consideration for NM is promising. Potential translation into clinical use requires consideration of additional factors such as the potential muscle type specificity as well as the possibility of gene expression remodeling. Challenges in clinical translation include the rarity and heterogeneity of genotypes, phenotypes, and disease trajectories, as well as the lack of longitudinal natural history data and validated outcomes and biomarkers.
Collapse
Affiliation(s)
- Gemma Fisher
- MDUK Neuromuscular Centre, Department of Paediatrics, University of Oxford, Oxford, UK
| | - Laurane Mackels
- MDUK Neuromuscular Centre, Department of Paediatrics, University of Oxford, Oxford, UK.,Neuromuscular Reference Center, University and University Hospital of Liège, Liège, Belgium
| | - Theodora Markati
- MDUK Neuromuscular Centre, Department of Paediatrics, University of Oxford, Oxford, UK
| | - Anna Sarkozy
- Dubowitz Neuromuscular Centre, UCL Great Ormond Street Hospital, Institute of Child Health, London, UK
| | - Julien Ochala
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Heinz Jungbluth
- Department of Paediatric Neurology - Neuromuscular Service, Evelina Children's Hospital, Guy's & St Thomas' NHS Foundation Trust, London, UK.,Randall Centre for Cell and Molecular Biophysics, Muscle Signalling Section, Faculty of Life Sciences and Medicine (FoLSM), King's College London, London, UK
| | - Sithara Ramdas
- MDUK Neuromuscular Centre, Department of Paediatrics, University of Oxford, Oxford, UK.,Department of Paediatric Neurology, John Radcliffe Hospital, Oxford, UK
| | - Laurent Servais
- MDUK Neuromuscular Centre, Department of Paediatrics, University of Oxford, Oxford, UK.,Neuromuscular Reference Center, University and University Hospital of Liège, Liège, Belgium
| |
Collapse
|
17
|
Rossi D, Catallo MR, Pierantozzi E, Sorrentino V. Mutations in proteins involved in E-C coupling and SOCE and congenital myopathies. J Gen Physiol 2022; 154:e202213115. [PMID: 35980353 PMCID: PMC9391951 DOI: 10.1085/jgp.202213115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 07/15/2022] [Accepted: 07/21/2022] [Indexed: 11/24/2022] Open
Abstract
In skeletal muscle, Ca2+ necessary for muscle contraction is stored and released from the sarcoplasmic reticulum (SR), a specialized form of endoplasmic reticulum through the mechanism known as excitation-contraction (E-C) coupling. Following activation of skeletal muscle contraction by the E-C coupling mechanism, replenishment of intracellular stores requires reuptake of cytosolic Ca2+ into the SR by the activity of SR Ca2+-ATPases, but also Ca2+ entry from the extracellular space, through a mechanism called store-operated calcium entry (SOCE). The fine orchestration of these processes requires several proteins, including Ca2+ channels, Ca2+ sensors, and Ca2+ buffers, as well as the active involvement of mitochondria. Mutations in genes coding for proteins participating in E-C coupling and SOCE are causative of several myopathies characterized by a wide spectrum of clinical phenotypes, a variety of histological features, and alterations in intracellular Ca2+ balance. This review summarizes current knowledge on these myopathies and discusses available knowledge on the pathogenic mechanisms of disease.
Collapse
Affiliation(s)
- Daniela Rossi
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
- Interdepartmental Program of Molecular Diagnosis and Pathogenetic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliero Universitaria Senese, Siena, Italy
| | - Maria Rosaria Catallo
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Enrico Pierantozzi
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Vincenzo Sorrentino
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
- Interdepartmental Program of Molecular Diagnosis and Pathogenetic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliero Universitaria Senese, Siena, Italy
| |
Collapse
|
18
|
Wang J, Fan Y, Mittal B, Sanger JM, Sanger JW. Comparison of incorporation of wild type and mutated actins into sarcomeres in skeletal muscle cells: A fluorescence recovery after photobleaching study. Cytoskeleton (Hoboken) 2022; 79:105-115. [PMID: 36085566 DOI: 10.1002/cm.21725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/11/2022] [Accepted: 08/31/2022] [Indexed: 01/30/2023]
Abstract
The α-actin mutation G15R in the nucleotide-binding pocket of skeletal muscle, causes severe actin myopathy in human skeletal muscles. Expressed in cultured embryonic quail skeletal myotubes, YFP-G15R-α-actin incorporates in sarcomeres in a pattern indistinguishable from wildtype YFP-α-actin. However, patches of YFP-G15R-α-actin form, resembling those in patients. Analyses with FRAP of incorporation of YFP-G15R-α-actin showed major differences between fast-exchanging plus ends of overlapping actin filaments in Z-bands, versus slow exchanging ends of overlapping thin filaments in the middle of sarcomeres. Wildtype skeletal muscle YFP-α-actin shows a faster rate of incorporation at plus ends of F-actin than at their minus ends. Incorporation of YFP-G15R-α-actin molecules is reduced at plus ends, increased at minus ends. The same relationship of wildtype YFP-α-actin incorporation is seen in myofibrils treated with cytochalasin-D: decreased dynamics at plus ends, increased dynamics at minus ends, and F-actin aggregates. Speculation: imbalance of normal polarized assembly of F-actin creates excess monomers that form F-actin aggregates. Two other severe skeletal muscle YFP-α-actin mutations (H40Y and V163L) not in the nucleotide pocket do not affect actin dynamics, and lack F-actin aggregates. These results indicate that normal α-actin plus and minus end dynamics are needed to maintain actin filament stability, and avoid F-actin patches.
Collapse
Affiliation(s)
- Jushuo Wang
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Yingli Fan
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Balraj Mittal
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Jean M Sanger
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Joseph W Sanger
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
| |
Collapse
|
19
|
Labasse C, Brochier G, Taratuto AL, Cadot B, Rendu J, Monges S, Biancalana V, Quijano-Roy S, Bui MT, Chanut A, Madelaine A, Lacène E, Beuvin M, Amthor H, Servais L, de Feraudy Y, Erro M, Saccoliti M, Neto OA, Fauré J, Lannes B, Laugel V, Coppens S, Lubieniecki F, Bello AB, Laing N, Evangelista T, Laporte J, Böhm J, Romero NB. Severe ACTA1-related nemaline myopathy: intranuclear rods, cytoplasmic bodies, and enlarged perinuclear space as characteristic pathological features on muscle biopsies. Acta Neuropathol Commun 2022; 10:101. [PMID: 35810298 PMCID: PMC9271256 DOI: 10.1186/s40478-022-01400-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 06/19/2022] [Indexed: 11/10/2022] Open
Abstract
Nemaline myopathy (NM) is a muscle disorder with broad clinical and genetic heterogeneity. The clinical presentation of affected individuals ranges from severe perinatal muscle weakness to milder childhood-onset forms, and the disease course and prognosis depends on the gene and mutation type. To date, 14 causative genes have been identified, and ACTA1 accounts for more than half of the severe NM cases. ACTA1 encodes α-actin, one of the principal components of the contractile units in skeletal muscle. We established a homogenous cohort of ten unreported families with severe NM, and we provide clinical, genetic, histological, and ultrastructural data. The patients manifested antenatal or neonatal muscle weakness requiring permanent respiratory assistance, and most deceased within the first months of life. DNA sequencing identified known or novel ACTA1 mutations in all. Morphological analyses of the muscle biopsy specimens showed characteristic features of NM histopathology including cytoplasmic and intranuclear rods, cytoplasmic bodies, and major myofibrillar disorganization. We also detected structural anomalies of the perinuclear space, emphasizing a physiological contribution of skeletal muscle α-actin to nuclear shape. In-depth investigations of the nuclei confirmed an abnormal localization of lamin A/C, Nesprin-1, and Nesprin-2, forming the main constituents of the nuclear lamina and the LINC complex and ensuring nuclear envelope integrity. To validate the relevance of our findings, we examined muscle samples from three previously reported ACTA1 cases, and we identified the same set of structural aberrations. Moreover, we measured an increased expression of cardiac α-actin in the muscle samples from the patients with longer lifespan, indicating a potential compensatory effect. Overall, this study expands the genetic and morphological spectrum of severe ACTA1-related nemaline myopathy, improves molecular diagnosis, highlights the enlargement of the perinuclear space as an ultrastructural hallmark, and indicates a potential genotype/phenotype correlation.
Collapse
Affiliation(s)
- Clémence Labasse
- Myology Institute, Neuromuscular Morphology Unit, Reference Center of Neuromuscular Diseases Nord-Est-IDF, GHU Pitié-Salpêtrière, Paris, France
| | - Guy Brochier
- Myology Institute, Neuromuscular Morphology Unit, Reference Center of Neuromuscular Diseases Nord-Est-IDF, GHU Pitié-Salpêtrière, Paris, France
| | - Ana-Lia Taratuto
- Neuropathology and Neuromuscular Diseases Laboratory, Buenos Aires, Argentina
| | - Bruno Cadot
- Sorbonne Université, INSERM, Center for Research in Myology, Myology Institute, APHP, GHU Pitié-Salpêtrière, Paris, France
| | - John Rendu
- Laboratoire de Biochimie Et Génétique Moléculaire, Pôle de Biologie, CHU Grenoble Alpes, Grenoble, France.,Université Grenoble Alpes, Inserm, U1216, CHU Grenoble Alpes, Grenoble Institut Neurosciences, Grenoble, France
| | - Soledad Monges
- Servucio de Neurología Et Neuropatología, Hospital de Pediatría J.P. Garrahan, Buenos Aires, Argentina
| | - Valérie Biancalana
- Institut de Génétique Et de Biologie Moléculaire Et Cellulaire (IGBMC), Inserm U 1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France.,Laboratoire de Diagnostic Génétique, Faculté de Médecine, CHRU, Strasbourg, France
| | - Susana Quijano-Roy
- APHP Université Paris-Saclay, Pediatric Neuromuscular Unit, Hôpital Universitaire Raymond-Poincaré, Université de Versailles Saint-Quentin-en-Yvelines, Garches, France
| | - Mai Thao Bui
- Myology Institute, Neuromuscular Morphology Unit, Reference Center of Neuromuscular Diseases Nord-Est-IDF, GHU Pitié-Salpêtrière, Paris, France
| | - Anaïs Chanut
- Myology Institute, Neuromuscular Morphology Unit, Reference Center of Neuromuscular Diseases Nord-Est-IDF, GHU Pitié-Salpêtrière, Paris, France
| | - Angéline Madelaine
- Myology Institute, Neuromuscular Morphology Unit, Reference Center of Neuromuscular Diseases Nord-Est-IDF, GHU Pitié-Salpêtrière, Paris, France
| | - Emmanuelle Lacène
- Myology Institute, Neuromuscular Morphology Unit, Reference Center of Neuromuscular Diseases Nord-Est-IDF, GHU Pitié-Salpêtrière, Paris, France
| | - Maud Beuvin
- Myology Institute, Neuromuscular Morphology Unit, Reference Center of Neuromuscular Diseases Nord-Est-IDF, GHU Pitié-Salpêtrière, Paris, France.,Sorbonne Université, INSERM, Center for Research in Myology, Myology Institute, APHP, GHU Pitié-Salpêtrière, Paris, France
| | - Helge Amthor
- APHP Université Paris-Saclay, Pediatric Neuromuscular Unit, Hôpital Universitaire Raymond-Poincaré, Université de Versailles Saint-Quentin-en-Yvelines, Garches, France
| | - Laurent Servais
- Centre de Références Des Maladies Neuromusculaires, Department of Paediatrics, University Hospital Liège & University of Liège, Liège, Belgium.,Department of Paediatrics, MDUK Oxford Neuromuscular Centre, University of Oxford, Oxford, UK
| | - Yvan de Feraudy
- Institut de Génétique Et de Biologie Moléculaire Et Cellulaire (IGBMC), Inserm U 1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France.,Department of Neuropediatrics, Strasbourg University Hospital, Strasbourg, France
| | - Marcela Erro
- Gutierrez Pediatric Hospital, Buenos Aires, Argentina
| | - Maria Saccoliti
- Neuropathology and Neuromuscular Diseases Laboratory, Buenos Aires, Argentina
| | - Osorio Abath Neto
- Institut de Génétique Et de Biologie Moléculaire Et Cellulaire (IGBMC), Inserm U 1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| | - Julien Fauré
- Laboratoire de Biochimie Et Génétique Moléculaire, Pôle de Biologie, CHU Grenoble Alpes, Grenoble, France.,Université Grenoble Alpes, Inserm, U1216, CHU Grenoble Alpes, Grenoble Institut Neurosciences, Grenoble, France
| | - Béatrice Lannes
- Department of Pathology, Strasbourg University Hospital, Strasbourg, France
| | - Vincent Laugel
- Department of Neuropediatrics, Strasbourg University Hospital, Strasbourg, France
| | - Sandra Coppens
- Center of Human Genetics, Université Libre de Bruxelles, Brussels, Belgium
| | - Fabiana Lubieniecki
- Servucio de Neurología Et Neuropatología, Hospital de Pediatría J.P. Garrahan, Buenos Aires, Argentina
| | - Ana Buj Bello
- Université Paris-Saclay, Integrare Research Unit UMR S951, Inserm, Evry, France.,Généthon, Université Evry, Evry, France
| | - Nigel Laing
- Centre for Medical Research, University of Western Australia, Harry Perkins Institute of Medical Research, Perth, Australia
| | - Teresinha Evangelista
- Myology Institute, Neuromuscular Morphology Unit, Reference Center of Neuromuscular Diseases Nord-Est-IDF, GHU Pitié-Salpêtrière, Paris, France.,Sorbonne Université, INSERM, Center for Research in Myology, Myology Institute, APHP, GHU Pitié-Salpêtrière, Paris, France
| | - Jocelyn Laporte
- Institut de Génétique Et de Biologie Moléculaire Et Cellulaire (IGBMC), Inserm U 1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| | - Johann Böhm
- Institut de Génétique Et de Biologie Moléculaire Et Cellulaire (IGBMC), Inserm U 1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| | - Norma B Romero
- Myology Institute, Neuromuscular Morphology Unit, Reference Center of Neuromuscular Diseases Nord-Est-IDF, GHU Pitié-Salpêtrière, Paris, France. .,Sorbonne Université, INSERM, Center for Research in Myology, Myology Institute, APHP, GHU Pitié-Salpêtrière, Paris, France.
| |
Collapse
|
20
|
Suleski IS, Smith R, Vo C, Scriba CK, Saker S, Larmonier T, Malfatti E, Romero NB, Houweling PJ, Nowak KJ, Laing NG, Taylor RL, Clayton JS. Generation of two isogenic induced pluripotent stem cell lines from a 1-month-old nemaline myopathy patient harbouring a homozygous recessive c.121C>T (p.Arg39Ter) variant in the ACTA1 gene. Stem Cell Res 2022; 63:102830. [DOI: 10.1016/j.scr.2022.102830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Revised: 04/21/2022] [Accepted: 05/05/2022] [Indexed: 10/18/2022] Open
|
21
|
Vahokoski J, Calder LJ, Lopez AJ, Molloy JE, Kursula I, Rosenthal PB. High-resolution structures of malaria parasite actomyosin and actin filaments. PLoS Pathog 2022; 18:e1010408. [PMID: 35377914 PMCID: PMC9037914 DOI: 10.1371/journal.ppat.1010408] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 04/25/2022] [Accepted: 03/01/2022] [Indexed: 12/20/2022] Open
Abstract
Malaria is responsible for half a million deaths annually and poses a huge economic burden on the developing world. The mosquito-borne parasites (Plasmodium spp.) that cause the disease depend upon an unconventional actomyosin motor for both gliding motility and host cell invasion. The motor system, often referred to as the glideosome complex, remains to be understood in molecular terms and is an attractive target for new drugs that might block the infection pathway. Here, we present the high-resolution structure of the actomyosin motor complex from Plasmodium falciparum. The complex includes the malaria parasite actin filament (PfAct1) complexed with the class XIV myosin motor (PfMyoA) and its two associated light-chains. The high-resolution core structure reveals the PfAct1:PfMyoA interface in atomic detail, while at lower-resolution, we visualize the PfMyoA light-chain binding region, including the essential light chain (PfELC) and the myosin tail interacting protein (PfMTIP). Finally, we report a bare PfAct1 filament structure at improved resolution.
Collapse
Affiliation(s)
- Juha Vahokoski
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Lesley J. Calder
- Structural Biology of Cells and Viruses Laboratory, Francis Crick Institute, London, United Kingdom
| | - Andrea J. Lopez
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Justin E. Molloy
- Structural Biology of Cells and Viruses Laboratory, Francis Crick Institute, London, United Kingdom
| | - Inari Kursula
- Department of Biomedicine, University of Bergen, Bergen, Norway
- Biocenter Oulu and Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Peter B. Rosenthal
- Structural Biology of Cells and Viruses Laboratory, Francis Crick Institute, London, United Kingdom
| |
Collapse
|
22
|
Qi A, Ru W, Yang H, Yang Y, Tang J, Yang S, Lan X, Lei C, Sun X, Chen H. Circular RNA ACTA1 Acts as a Sponge for miR-199a-5p and miR-433 to Regulate Bovine Myoblast Development through the MAP3K11/MAP2K7/JNK Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:3357-3373. [PMID: 35234473 DOI: 10.1021/acs.jafc.1c07762] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Circular RNAs (circRNAs) are a special class of noncoding RNA molecules that regulate many different biological processes. Myogenesis, a complex process, is primarily regulated by myogenic regulatory factors (MRFs) and various noncoding RNAs. However, the functions and regulatory mechanisms of circRNAs in myoblast development are unclear. In this study, we analyzed circRNA sequencing data of bovine myocyte tissues and identified circACTA1. Functional assays showed that circACTA1 could inhibit bovine myocyte proliferation and promote cell apoptosis and cytodifferentiation. In addition, circACTA1 could promote muscle repair in vivo. Mechanistically, luciferase assay and RNA immunoprecipitation were used to examine the interaction between circACTA1, miR-199a-5p, miR-433, and the target genes MAP3K11 and MAPK8. Meanwhile, we found that miR-199a-5p and miR-433 could suppress the expression of MAP3K11 and MAPK8, respectively. However, circACTA1 could mitigate this effect and activate the JNK signaling pathway. In conclusion, our results suggest that circACTA1 regulates the multiplication, apoptosis, and cytodifferentiation of bovine myocytes by competitively combining with miR-199a-5p and miR-433 to activate the mitogen-activated protein kinase kinase kinase 11 (MAP3K11)/mitogen-activated protein kinase kinase 7 (MAP2K7)/JNK signaling pathway.
Collapse
Affiliation(s)
- Ao Qi
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
| | - Wenxiu Ru
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
| | - Haiyan Yang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
| | - Yu Yang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
| | - Jia Tang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
| | - Shuling Yang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
| | - Xianyong Lan
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
| | - Chuzhao Lei
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
| | - Xiuzhu Sun
- College of Grassland Agriculture, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
| | - Hong Chen
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, Xianyang, Shaanxi 712100, China
- College of Animal Science, Xinjiang Agricultural University, Urumqi 830052, China
| |
Collapse
|
23
|
Seo YJ, Lim B, Kim DY, Lim KS, Kim JM. Regulation of Swine Growth by Backfat Tissue during Growing and Finishing Stages. Animals (Basel) 2021; 11:ani11123511. [PMID: 34944286 PMCID: PMC8698142 DOI: 10.3390/ani11123511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/03/2021] [Accepted: 12/06/2021] [Indexed: 12/13/2022] Open
Abstract
Simple Summary Swine have a large influence on livestock animals. In particular, Korean native pigs (KNPs) have unique traits in their body composition including lipids and proteins. In this study, we performed RNA-sequencing analysis to identify porcine transcriptomic changes during growing and finishing stages in the backfat tissue of KNP and Yorkshire pig crossbreeds. Enrichment analysis revealed that differentially expressed genes (DEGs) were significantly influenced by lipid metabolism and hormonal changes. Network analysis showed that the LEP and ACTC1 genes were connected with significant terminologies which resulted from up- and down-regulated DEGs. The results of our analysis indicate that backfat tissue could regulate swine biology during stages of growth. Consequently, our analysis provided comprehensive understanding for transcriptomic changes during growth periods. Abstract Recently, interest in the function of pig backfat (BF) has increased in the field of livestock animals, and many transcriptome-based studies using commercial pig breeds have been conducted. However, there is a lack of comprehensive studies regarding the biological mechanisms of Korean native pigs (KNPs) and Yorkshire pig crossbreeds. In this study, therefore, BF samples of F1 crossbreeds of KNPs and Yorkshire pigs were investigated to identify differentially expressed genes (DEGs) and their related terms using RNA-sequencing analysis. DEG analysis identified 611 DEGs, of which 182 were up-regulated and 429 were down-regulated. Lipid metabolism was identified in the up-regulated genes, whereas growth and maturation-related terminologies were identified in the down-regulated genes. LEP and ACTC1 were identified as highly connected core genes during functional gene network analysis. Fat tissue was observed to affect lipid metabolism and organ development due to hormonal changes driven by transcriptional alteration. This study provides a comprehensive understanding of BF contribution to crossbreeds of KNPs and Yorkshire pigs during growth periods.
Collapse
Affiliation(s)
- Young-Jun Seo
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Gyeonggi-do, Korea; (Y.-J.S.); (B.L.); (D.-Y.K.)
| | - Byeonghwi Lim
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Gyeonggi-do, Korea; (Y.-J.S.); (B.L.); (D.-Y.K.)
| | - Do-Young Kim
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Gyeonggi-do, Korea; (Y.-J.S.); (B.L.); (D.-Y.K.)
| | - Kyu-Sang Lim
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA;
| | - Jun-Mo Kim
- Department of Animal Science and Technology, Chung-Ang University, Anseong 17546, Gyeonggi-do, Korea; (Y.-J.S.); (B.L.); (D.-Y.K.)
- Correspondence: ; Tel.: +82-31-670-3263; Fax: +82-31-675-3108
| |
Collapse
|
24
|
Ishikawa-Ankerhold HC, Kurzbach S, Kinali AS, Müller-Taubenberger A. Formation of Cytoplasmic Actin-Cofilin Rods is Triggered by Metabolic Stress and Changes in Cellular pH. Front Cell Dev Biol 2021; 9:742310. [PMID: 34869330 PMCID: PMC8635511 DOI: 10.3389/fcell.2021.742310] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 10/27/2021] [Indexed: 11/13/2022] Open
Abstract
Actin dynamics plays a crucial role in regulating essential cell functions and thereby is largely responsible to a considerable extent for cellular energy consumption. Certain pathological conditions in humans, like neurological disorders such as Alzheimer’s disease or amyotrophic lateral sclerosis (ALS) as well as variants of nemaline myopathy are associated with cytoskeletal abnormalities, so-called actin-cofilin rods. Actin-cofilin rods are aggregates consisting mainly of actin and cofilin, which are formed as a result of cellular stress and thereby help to ensure the survival of cells under unfavorable conditions. We have used Dictyostelium discoideum, an established model system for cytoskeletal research to study formation and principles of cytoplasmic actin rod assembly in response to energy depletion. Experimentally, depletion of ATP was provoked by addition of either sodium azide, dinitrophenol, or 2-deoxy-glucose, and the formation of rod assembly was recorded by live-cell imaging. Furthermore, we show that hyperosmotic shock induces actin-cofilin rods, and that a drop in the intracellular pH accompanies this condition. Our data reveal that acidification of the cytoplasm can induce the formation of actin-cofilin rods to varying degrees and suggest that a local reduction in cellular pH may be a cause for the formation of cytoplasmic rods. We hypothesize that local phase separation mechanistically triggers the assembly of actin-cofilin rods and thereby influences the material properties of actin structures.
Collapse
Affiliation(s)
- Hellen C Ishikawa-Ankerhold
- Department of Internal Medicine I, University Hospital, LMU Munich, Munich, Germany.,Walter Brendel Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Sophie Kurzbach
- Department of Cell Biology (Anatomy III), Biomedical Center (BMC), LMU Munich, Munich, Germany
| | - Arzu S Kinali
- Walter Brendel Centre of Experimental Medicine, University Hospital, LMU Munich, Munich, Germany
| | | |
Collapse
|
25
|
Gene expression changes in vastus lateralis muscle after different strength training regimes during rehabilitation following anterior cruciate ligament reconstruction. PLoS One 2021; 16:e0258635. [PMID: 34648569 PMCID: PMC8516190 DOI: 10.1371/journal.pone.0258635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 10/03/2021] [Indexed: 11/19/2022] Open
Abstract
Impaired muscle regeneration has repeatedly been described after anterior cruciate ligament reconstruction (ACL-R). The results of recent studies provided some evidence for negative alterations in knee extensor muscles after ACL-R causing persisting strength deficits in spite of the regain of muscle mass. Accordingly, we observed that 12 weeks of concentric/eccentric quadriceps strength training with eccentric overload (CON/ECC+) induced a significantly greater hypertrophy of the atrophied quadriceps muscle after ACL-R than conventional concentric/eccentric quadriceps strength training (CON/ECC). However, strength deficits persisted and there was an unexpected increase in the proportion of slow type I fibers instead of the expected shift towards a faster muscle phenotype after CON/ECC+. In order to shed further light on muscle recovery after ACL-R, the steady-state levels of 84 marker mRNAs were analyzed in biopsies obtained from the vastus lateralis muscle of 31 subjects before and after 12 weeks of CON/ECC+ (n = 18) or CON/ECC strength training (n = 13) during rehabilitation after ACL-R using a custom RT2 Profiler PCR array. Significant (p < 0.05) changes were detected in the expression of 26 mRNAs, several of them involved in muscle wasting/atrophy. A different pattern with regard to the strength training mode was observed for 16 mRNAs, indicating an enhanced hypertrophic stimulus, mechanical sensing or fast contractility after CON/ECC+. The effects of the type of autograft (quadriceps, QUAD, n = 19, or semitendinosus tendon, SEMI, n = 12) were reflected in the lower expression of 6 mRNAs involved in skeletal muscle hypertrophy or contractility in QUAD. In conclusion, the greater hypertrophic stimulus and mechanical stress induced by CON/ECC+ and a beginning shift towards a faster muscle phenotype after CON/ECC+ might be indicated by significant gene expression changes as well as still ongoing muscle wasting processes and a negative impact of QUAD autograft.
Collapse
|
26
|
Southard T, Kelly K, Armien AG. Myocardial protein aggregates in pet guinea pigs. Vet Pathol 2021; 59:157-163. [PMID: 34530659 DOI: 10.1177/03009858211042586] [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: 11/17/2022]
Abstract
A retrospective study of guinea pigs submitted for necropsy revealed intracytoplasmic inclusions in the cardiomyocytes of 26 of 30 animals. The inclusions were found with approximately the same frequency in male and female guinea pigs and were slightly more common in older animals. In most cases, the animals did not have clinical signs or necropsy findings suggestive of heart failure, and the cause of death or reason for euthanasia was attributed to concurrent disease processes. However, the 4 guinea pigs with the highest inclusion body burden all had pulmonary edema, sometimes with intra-alveolar hemosiderin-laden macrophages, suggestive of heart failure. The inclusions were found in both the left and right ventricular myocardium, mainly in the papillary muscles, but were most common in the right ventricular free wall. No inclusions were detected in the atrial myocardium or in skeletal muscle. The inclusions did not stain with Congo red or periodic acid-Schiff. Electron microscopy revealed dense aggregates of disorganized myofilaments and microtubules that displaced and compressed the adjacent organelles. By immunohistochemistry, there was some scattered immunoreactivity for desmin and actin at the periphery of the inclusions and punctate actin reactivity within the aggregates. The inclusions did not react with antibodies to ubiquitin or cardiac myosin, but were variably reactive for alpha B crystallin, a small heat shock chaperone protein. The inclusions were interpreted as evidence of impaired proteostasis.
Collapse
|
27
|
Halle JL, Counts-Franch BR, Prince RM, Carson JA. The Effect of Mechanical Stretch on Myotube Growth Suppression by Colon-26 Tumor-Derived Factors. Front Cell Dev Biol 2021; 9:690452. [PMID: 34395422 PMCID: PMC8363303 DOI: 10.3389/fcell.2021.690452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 07/08/2021] [Indexed: 12/16/2022] Open
Abstract
Preclinical models and in vitro experiments have provided valuable insight into the regulation of cancer-induced muscle wasting. Colon-26 (C26) tumor cells induce cachexia in mice, and conditioned media (CM) from these cells promotes myotube atrophy and catabolic signaling. While mechanical stimuli can prevent some effects of tumor-derived factors on myotubes, the impact of mechanical signaling on tumor-derived factor regulation of myosin heavy chain (MyHC) expression is not well understood. Therefore, we examined the effects of stretch-induced mechanical signaling on C2C12 myotube growth and MyHC expression after C26 CM exposure. C26 CM was administered to myotubes on day 5 of differentiation for 48 h. During the last 4 or 24 h of C26 CM exposure, 5% static uniaxial stretch was administered. C26 CM suppressed myotube growth and MyHC protein and mRNA expression. Stretch for 24 h increased myotube size and prevented the C26 CM suppression of MyHC-Fast protein expression. Stretch did not change suppressed MyHC mRNA expression. Stretch for 24 h reduced Atrogin-1/MAFbx, MuRF-1, and LC3B II/I ratio and increased integrin β1D protein expression and the myogenin-to-MyoD protein ratio. Stretch in the last 4 h of CM increased ERK1/2 phosphorylation but did not alter the CM induction of STAT3 or p38 phosphorylation. These results provide evidence that in myotubes pre-incubated with CM, the induction of mechanical signaling can still provide a growth stimulus and preserve MyHC-Fast protein expression independent of changes in mRNA expression.
Collapse
Affiliation(s)
| | | | | | - James A. Carson
- Integrative Muscle Biology Laboratory, Division of Rehabilitation Sciences, College of Health Professions, University of Tennessee Health Science Center, Memphis, TN, United States
| |
Collapse
|
28
|
Clayton JS, Scriba CK, Romero NB, Malfatti E, Saker S, Larmonier T, Nowak KJ, Ravenscroft G, Laing NG, Taylor RL. Generation of two isogenic induced pluripotent stem cell lines from a 10-year-old typical nemaline myopathy patient with a heterozygous dominant c.541G>A (p.Asp179Asn) pathogenic variant in the ACTA1 gene. Stem Cell Res 2021; 55:102482. [PMID: 34388489 DOI: 10.1016/j.scr.2021.102482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 06/28/2021] [Accepted: 07/24/2021] [Indexed: 10/20/2022] Open
Abstract
Nemaline myopathy (NM) is a congenital myopathy typically characterized by skeletal muscle weakness and the presence of nemaline bodies in myofibres. Approximately 25% of NM cases are caused by variants in ACTA1. We generated two induced pluripotent stem cell lines from lymphoblastoid cells of a 10-year-old female with typical NM harbouring a dominant pathogenic variant in ACTA1 (c.541C>A). The isogenic lines displayed typical iPSC morphology, expressed pluripotency markers, and could differentiate into each of the three germ layers. Although the lines have partial or complete X chromosome duplication, they may still prove useful as models of human ACTA1 disease.
Collapse
Affiliation(s)
- Joshua S Clayton
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia.
| | - Carolin K Scriba
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia; Neurogenetics Laboratory, Department of Diagnostic Genomics, PP Block, QEII Medical Centre, Nedlands, WA, Australia
| | - Norma B Romero
- Sorbonne Université, Myology Institute, Neuromuscular Morphology Unit, Center for Research in Myology, GH Pitié-Salpêtrière, Paris, France; Centre de Référence de Pathologie Neuromusculaire Paris-Est, GHU Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Edoardo Malfatti
- APHP, Centre de Référence de Pathologie Neuromusculaire Nord-Est-Ile-de-France, Henri Mondor Hospital, France; Université Paris Est, U955, INSERM, IMRB, F-94010 Créteil, France
| | - Safaa Saker
- Genethon, DNA and Cell Bank, 91000 Evry, France
| | | | - Kristen J Nowak
- Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia; Office of Population Health Genomics, Public and Aboriginal Health Division, Western Australian Department of Health, East Perth, WA, Australia; Faculty of Health and Medical Sciences, School of Biomedical Sciences, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| | - Gianina Ravenscroft
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| | - Nigel G Laing
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| | - Rhonda L Taylor
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| |
Collapse
|
29
|
Meunier J, Villar-Quiles RN, Duband-Goulet I, Ferreiro A. Inherited Defects of the ASC-1 Complex in Congenital Neuromuscular Diseases. Int J Mol Sci 2021; 22:ijms22116039. [PMID: 34204919 PMCID: PMC8199739 DOI: 10.3390/ijms22116039] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/19/2021] [Accepted: 05/27/2021] [Indexed: 12/12/2022] Open
Abstract
Defects in transcriptional and cell cycle regulation have emerged as novel pathophysiological mechanisms in congenital neuromuscular disease with the recent identification of mutations in the TRIP4 and ASCC1 genes, encoding, respectively, ASC-1 and ASCC1, two subunits of the ASC-1 (Activating Signal Cointegrator-1) complex. This complex is a poorly known transcriptional coregulator involved in transcriptional, post-transcriptional or translational activities. Inherited defects in components of the ASC-1 complex have been associated with several autosomal recessive phenotypes, including severe and mild forms of striated muscle disease (congenital myopathy with or without myocardial involvement), but also cases diagnosed of motor neuron disease (spinal muscular atrophy). Additionally, antenatal bone fractures were present in the reported patients with ASCC1 mutations. Functional studies revealed that the ASC-1 subunit is a novel regulator of cell cycle, proliferation and growth in muscle and non-muscular cells. In this review, we summarize and discuss the available data on the clinical and histopathological phenotypes associated with inherited defects of the ASC-1 complex proteins, the known genotype–phenotype correlations, the ASC-1 pathophysiological role, the puzzling question of motoneuron versus primary muscle involvement and potential future research avenues, illustrating the study of rare monogenic disorders as an interesting model paradigm to understand major physiological processes.
Collapse
Affiliation(s)
- Justine Meunier
- Basic and Translational Myology Laboratory, UMR8251, University of Paris/National Center for Scientific Research, 75013 Paris, France; (J.M.); (R.-N.V.-Q.)
| | - Rocio-Nur Villar-Quiles
- Basic and Translational Myology Laboratory, UMR8251, University of Paris/National Center for Scientific Research, 75013 Paris, France; (J.M.); (R.-N.V.-Q.)
- Reference Center for Neuromuscular Disorders, Pitié-Salpêtrière Hospital, APHP, Institute of Myology, 75013 Paris, France
| | - Isabelle Duband-Goulet
- Basic and Translational Myology Laboratory, UMR8251, University of Paris/National Center for Scientific Research, 75013 Paris, France; (J.M.); (R.-N.V.-Q.)
- Correspondence: (I.D.-G.); (A.F.); Tel.: +33-1-5727-7965 (I.D.-G.); +33-1-5727-7959 (A.F.)
| | - Ana Ferreiro
- Basic and Translational Myology Laboratory, UMR8251, University of Paris/National Center for Scientific Research, 75013 Paris, France; (J.M.); (R.-N.V.-Q.)
- Reference Center for Neuromuscular Disorders, Pitié-Salpêtrière Hospital, APHP, Institute of Myology, 75013 Paris, France
- Correspondence: (I.D.-G.); (A.F.); Tel.: +33-1-5727-7965 (I.D.-G.); +33-1-5727-7959 (A.F.)
| |
Collapse
|
30
|
Gruszczynska-Biegala J, Stefan A, Kasprzak AA, Dobryszycki P, Khaitlina S, Strzelecka-Gołaszewska H. Myopathy-Sensitive G-Actin Segment 227-235 Is Involved in Salt-Induced Stabilization of Contacts within the Actin Filament. Int J Mol Sci 2021; 22:ijms22052327. [PMID: 33652657 PMCID: PMC7956362 DOI: 10.3390/ijms22052327] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 02/16/2021] [Accepted: 02/21/2021] [Indexed: 01/09/2023] Open
Abstract
Formation of stable actin filaments, critically important for actin functions, is determined by the ionic strength of the solution. However, not much is known about the elements of the actin fold involved in ionic-strength-dependent filament stabilization. In this work, F-actin was destabilized by Cu2+ binding to Cys374, and the effects of solvent conditions on the dynamic properties of F-actin were correlated with the involvement of Segment 227-235 in filament stabilization. The results of our work show that the presence of Mg2+ at the high-affinity cation binding site of Cu-modified actin polymerized with MgCl2 strongly enhances the rate of filament subunit exchange and promotes the filament instability. In the presence of 0.1 M KCl, the filament subunit exchange was 2-3-fold lower than that in the MgCl2-polymerized F-actin. This effect correlates with the reduced accessibility of the D-loop and Segment 227-235 on opposite filament strands, consistent with an ionic-strength-dependent conformational change that modulates involvement of Segment 227-235 in stabilization of the intermonomer interface. KCl may restrict the mobility of the α-helix encompassing part of Segment 227-235 and/or be bound to Asp236 at the boundary of Segment 227-235. These results provide experimental evidence for the involvement of Segment 227-235 in salt-induced stabilization of contacts within the actin filament and suggest that they can be weakened by mutations characteristic of actin-associated myopathies.
Collapse
Affiliation(s)
- Joanna Gruszczynska-Biegala
- Department of Muscle Biochemistry, Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland; (J.G.-B.); (A.S.); (A.A.K.); (H.S.-G.)
- Molecular Biology Unit, Mossakowski Medical Research Institute Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Andrzej Stefan
- Department of Muscle Biochemistry, Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland; (J.G.-B.); (A.S.); (A.A.K.); (H.S.-G.)
| | - Andrzej A. Kasprzak
- Department of Muscle Biochemistry, Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland; (J.G.-B.); (A.S.); (A.A.K.); (H.S.-G.)
| | - Piotr Dobryszycki
- Faculty of Chemistry, Wrocław University of Technology, 50-370 Wroclaw, Poland;
| | - Sofia Khaitlina
- Laboratory of Cytology of Unicellular Organisms, Institute of Cytology, Russian Academy of Sciences, 194064 St. Petersburg, Russia
- Correspondence:
| | - Hanna Strzelecka-Gołaszewska
- Department of Muscle Biochemistry, Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland; (J.G.-B.); (A.S.); (A.A.K.); (H.S.-G.)
| |
Collapse
|
31
|
Clayton JS, Scriba CK, Romero NB, Malfatti E, Saker S, Larmonier T, Nowak KJ, Ravenscroft G, Laing NG, Taylor RL. Generation of two isogenic induced pluripotent stem cell lines from a 4-month-old severe nemaline myopathy patient with a heterozygous dominant c.553C > A (p.Arg183Ser) variant in the ACTA1 gene. Stem Cell Res 2021; 53:102273. [PMID: 33740643 DOI: 10.1016/j.scr.2021.102273] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Accepted: 02/22/2021] [Indexed: 11/19/2022] Open
Abstract
Nemaline myopathy (NM) is a congenital myopathy typically characterized by skeletal muscle weakness and the presence of abnormal thread- or rod-like structures (nemaline bodies) in myofibres. Pathogenic variants in the skeletal muscle alpha actin gene, ACTA1, cause approximately 25% of all NM cases. We generated two induced pluripotent stem cell lines from lymphoblastoid cells of a 4-month-old female with severe NM harbouring a dominant variant in ACTA1 (c.553C > A). The isogenic lines displayed characteristic iPSC morphology, expressed pluripotency markers, differentiated into cells of all three germ layers, and possessed normal karyotypes. These lines could be useful models of human ACTA1 disease.
Collapse
Affiliation(s)
- Joshua S Clayton
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia.
| | - Carolin K Scriba
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia; Neurogenetics Laboratory, Department of Diagnostic Genomics, PP Block, QEII Medical Centre, Nedlands, WA, Australia
| | - Norma B Romero
- Sorbonne Université, Myology Institute, Neuromuscular Morphology Unit, Center for Research in Myology, GH Pitié-Salpêtrière, Paris, France; Centre de Référence de Pathologie Neuromusculaire Paris-Est, GHU Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Edoardo Malfatti
- Reference center for Neuromuscular disorders, Henri Mondor teaching hospital, University of Versailles-Paris Saclay, France
| | - Safaa Saker
- Genethon, DNA and Cell bank, 91000 Evry, France
| | | | - Kristen J Nowak
- Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia; Office of Population Health Genomics, Public and Aboriginal Health Division, Western Australian Department of Health, East Perth, WA, Australia; Faculty of Health and Medical Sciences, School of Biomedical Sciences, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| | - Gianina Ravenscroft
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| | - Nigel G Laing
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| | - Rhonda L Taylor
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| |
Collapse
|
32
|
Garibaldi M, Fattori F, Pennisi EM, Merlonghi G, Fionda L, Vanoli F, Leonardi L, Bucci E, Morino S, Micaloni A, Tartaglione T, Uijterwijk B, Zierikzee M, Ottenheijm C, Bertini ES, Stoppacciaro A, Raffa S, Salvetti M, Antonini G. Novel ACTA1 mutation causes late-presenting nemaline myopathy with unusual dark cores. Neuromuscul Disord 2020; 31:139-148. [PMID: 33384202 DOI: 10.1016/j.nmd.2020.11.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 11/19/2020] [Accepted: 11/25/2020] [Indexed: 12/24/2022]
Abstract
ACTA1 gene encodes the skeletal muscle alpha-actin, the core of thin filaments of the sarcomere. ACTA1 mutations are responsible of several muscle disorders including nemaline, cores, actin aggregate myopathies and fiber-type disproportion. We report clinical, muscle imaging, histopatological and genetic data of an Italian family carrying a novel ACTA1 mutation. All affected members showed a late-presenting, diffuse muscle weakness with sternocleidomastoideus and temporalis atrophy. Mild dysmorphic features were also detected. The most affected muscles by muscle MRI were rectus abdominis, gluteus minimus, vastus intermedius and both gastrocnemii. Muscle biopsy showed the presence of nemaline bodies with several unusual dark areas at Gomori Trichrome, corresponding to unstructured cores with abundant electrodense material by electron microscopy. The molecular analysis revealed missense variant c.148G>A; p.(Gly50Ser) in the exon 3 of ACTA1, segregating with affected members in the family. We performed a functional essay of fibre contractility showing a higher pCa50 (a measure of the calcium sensitivity of force) of type 1 fibers compared to control subjects' type 1 muscle fibers. Our findings expand the clinico-pathological spectrum of ACTA1-related congenital myopathies and the genetic spectrum of core-rod myopathies.
Collapse
Affiliation(s)
- Matteo Garibaldi
- Neuromuscular and Rare Disease Centre, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy.
| | - Fabiana Fattori
- Unit of Neuromuscular and Neurodegenerative Disorders, Laboratory of Molecular Medicine, Bambino Gesù Children's Research Hospital, Rome, Italy
| | - Elena Maria Pennisi
- Unit of Neuromuscular Disorders, Neurology, San Filippo Neri Hospital, Rome, Italy
| | - Gioia Merlonghi
- Neuromuscular and Rare Disease Centre, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Laura Fionda
- Neuromuscular and Rare Disease Centre, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Fiammetta Vanoli
- Neuromuscular and Rare Disease Centre, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Luca Leonardi
- Neuromuscular and Rare Disease Centre, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Elisabetta Bucci
- Neuromuscular and Rare Disease Centre, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Stefania Morino
- Neuromuscular and Rare Disease Centre, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Andrea Micaloni
- Laboratory of Ultrastructural pathology, Department of Clinical and Molecular Medicine, SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Tommaso Tartaglione
- Department of Radiology, Istituto Dermopatico dell'Immacolata, IRCCS, Rome, Italy
| | - Bas Uijterwijk
- Department of Physiology, Amsterdam UMC (location VUmc), Amsterdam, Netherlands
| | - Martijn Zierikzee
- Department of Physiology, Amsterdam UMC (location VUmc), Amsterdam, Netherlands
| | - Coen Ottenheijm
- Department of Physiology, Amsterdam UMC (location VUmc), Amsterdam, Netherlands
| | - Enrico Silvio Bertini
- Unit of Neuromuscular and Neurodegenerative Disorders, Laboratory of Molecular Medicine, Bambino Gesù Children's Research Hospital, Rome, Italy
| | - Antonella Stoppacciaro
- Unit of Pathology, Department of Clinical and Molecular Medicine, SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Salvatore Raffa
- Laboratory of Ultrastructural pathology, Department of Clinical and Molecular Medicine, SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Marco Salvetti
- Neuromuscular and Rare Disease Centre, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| | - Giovanni Antonini
- Neuromuscular and Rare Disease Centre, Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), SAPIENZA University of Rome, Sant'Andrea Hospital, Rome, Italy
| |
Collapse
|
33
|
Lornage X, Quijano-Roy S, Amthor H, Carlier RY, Monnier N, Deleuze JF, Romero NB, Laporte J, Böhm J. Asymmetric muscle weakness due to ACTA1 mosaic mutations. Neurology 2020; 95:e3406-e3411. [DOI: 10.1212/wnl.0000000000010947] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 08/06/2020] [Indexed: 11/15/2022] Open
Abstract
ObjectiveTo characterize 2 unrelated patients with either asymmetric or unilateral muscle weakness at the clinical, genetic, histologic, and ultrastructural level.MethodsThe patients underwent thorough clinical examination, whole-body MRI, and exome sequencing. Muscle morphology was assessed by histology and electron microscopy.ResultsBoth patients presented with early-onset hypotonia, delayed motor milestones, scoliosis, and reduced pulmonary function. Patient P1 manifested unilateral muscle weakness exclusively affecting the left side of the body; the asymmetry was less pronounced in patient P2. Muscle biopsies from both patients showed nemaline rods as the main histopathologic hallmark, and MRI revealed major fatty infiltrations in selective head, proximal, and distal muscles, correlating with the degree of muscle weakness asymmetry. Exome sequencing on blood DNA from both patients identified de novo ACTA1 missense mutations in a small number of reads, suggesting mutation mosaicism. Subsequent Sanger sequencing confirmed the presence of the mutations on muscle DNA, while they were barely detectable on blood DNA.ConclusionsDe novo mutations can occur anytime during embryonic development and may result in a mosaic pattern of affected cells and tissues and lead to the development of an asymmetric clinical picture. The present study points out that mosaic mutations might not be easily detectable on leukocyte DNA and thereby escape routine genetic analysis, and possibly account for a significant number of molecularly undiagnosed patients.
Collapse
|
34
|
Fernández-Barroso MÁ, Caraballo C, Silió L, Rodríguez C, Nuñez Y, Sánchez-Esquiliche F, Matos G, García-Casco JM, Muñoz M. Differences in the Loin Tenderness of Iberian Pigs Explained through Dissimilarities in Their Transcriptome Expression Profile. Animals (Basel) 2020; 10:ani10091715. [PMID: 32971875 PMCID: PMC7552750 DOI: 10.3390/ani10091715] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/10/2020] [Accepted: 09/18/2020] [Indexed: 02/06/2023] Open
Abstract
Simple Summary The Iberian pig is the most representative autochthonous breed of the Mediterranean region with unique genetic and phenotypic characteristics. The breed has been successfully preserved by its high-quality meat and high-priced products. Tenderness is one of the most relevant meat quality traits, and meat tenderization is influenced by genetic and environmental effects such as pre-slaughter handling and post-mortem conditions. Tenderness could be included in Iberian pig breeding programs, mainly focused on the improvement of premium-cuts percentage, in order to avoid the meat quality decline. A better biological understanding of this trait is needed. In the current study, we analyze the transcriptome of pigs divergent for Warner–Bratzler shear force through RNA-seq technique for the identification, characterization and quantification of candidate genes involved in biological pathways, networks and functions affecting meat tenderness. Abstract Tenderness is one of the most important meat quality traits and it can be measured through shear force with the Warner–Bratzler test. In the current study, we use the RNA-seq technique to analyze the transcriptome of Longissimus dorsi (LD) muscle in two groups of Iberian pigs (Tough and Tender) divergent for shear force breeding values. We identified 200 annotated differentially expressed genes (DEGs) and 245 newly predicted isoforms. The RNAseq expression results of 10 genes were validated with quantitative PCR (qPCR). Functional analyses showed an enrichment of DE genes in biological processes related to proteolysis (CTSC, RHOD, MYH8, ACTC1, GADD45B, CASQ2, CHRNA9 and ANKRD1), skeletal muscle tissue development (ANKRD1, DMD, FOS and MSTN), lipid metabolism (FABP3 and PPARGC1A) and collagen metabolism (COL14A1). The upstream analysis revealed a total of 11 transcription regulatory factors that could regulate the expression of some DEGs. Among them, IGF1, VGLL3 and PPARG can be highlighted since they regulate the expression of genes involved in biological pathways that could affect tenderness. The experiment revealed a set of candidate genes and regulatory factors suggestive to search polymorphisms that could be incorporated in a breeding program for improving meat tenderness.
Collapse
Affiliation(s)
- Miguel Ángel Fernández-Barroso
- Centro Nacional de I+D del Cerdo Ibérico (CENIDCI), INIA, 06300 Zafra, Spain; (C.C.); (J.M.G.-C.)
- Departamento de Mejora Genética Animal, INIA, 28040 Madrid, Spain; (L.S.); (C.R.); (Y.N.); (M.M.)
- Correspondence:
| | - Carmen Caraballo
- Centro Nacional de I+D del Cerdo Ibérico (CENIDCI), INIA, 06300 Zafra, Spain; (C.C.); (J.M.G.-C.)
- Departamento de Mejora Genética Animal, INIA, 28040 Madrid, Spain; (L.S.); (C.R.); (Y.N.); (M.M.)
| | - Luis Silió
- Departamento de Mejora Genética Animal, INIA, 28040 Madrid, Spain; (L.S.); (C.R.); (Y.N.); (M.M.)
| | - Carmen Rodríguez
- Departamento de Mejora Genética Animal, INIA, 28040 Madrid, Spain; (L.S.); (C.R.); (Y.N.); (M.M.)
| | - Yolanda Nuñez
- Departamento de Mejora Genética Animal, INIA, 28040 Madrid, Spain; (L.S.); (C.R.); (Y.N.); (M.M.)
| | | | - Gema Matos
- Sánchez Romero Carvajal—Jabugo, SRC, 21290 Huelva, Spain; (F.S.-E.); (G.M.)
| | - Juan María García-Casco
- Centro Nacional de I+D del Cerdo Ibérico (CENIDCI), INIA, 06300 Zafra, Spain; (C.C.); (J.M.G.-C.)
- Departamento de Mejora Genética Animal, INIA, 28040 Madrid, Spain; (L.S.); (C.R.); (Y.N.); (M.M.)
| | - María Muñoz
- Centro Nacional de I+D del Cerdo Ibérico (CENIDCI), INIA, 06300 Zafra, Spain; (C.C.); (J.M.G.-C.)
| |
Collapse
|
35
|
Guhathakurta P, Phung LA, Prochniewicz E, Lichtenberger S, Wilson A, Thomas DD. Actin-binding compounds, previously discovered by FRET-based high-throughput screening, differentially affect skeletal and cardiac muscle. J Biol Chem 2020; 295:14100-14110. [PMID: 32788211 DOI: 10.1074/jbc.ra120.014445] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/06/2020] [Indexed: 01/21/2023] Open
Abstract
Actin's interactions with myosin and other actin-binding proteins are essential for cellular viability in numerous cell types, including muscle. In a previous high-throughput time-resolved FRET (TR-FRET) screen, we identified a class of compounds that bind to actin and affect actomyosin structure and function. For clinical utility, it is highly desirable to identify compounds that affect skeletal and cardiac muscle differently. Because actin is more highly conserved than myosin and most other muscle proteins, most such efforts have not targeted actin. Nevertheless, in the current study, we tested the specificity of the previously discovered actin-binding compounds for effects on skeletal and cardiac α-actins as well as on skeletal and cardiac myofibrils. We found that a majority of these compounds affected the transition of monomeric G-actin to filamentous F-actin, and that several of these effects were different for skeletal and cardiac actin isoforms. We also found that several of these compounds affected ATPase activity differently in skeletal and cardiac myofibrils. We conclude that these structural and biochemical assays can be used to identify actin-binding compounds that differentially affect skeletal and cardiac muscles. The results of this study set the stage for screening of large chemical libraries for discovery of novel compounds that act therapeutically and specifically on cardiac or skeletal muscle.
Collapse
Affiliation(s)
- Piyali Guhathakurta
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, USA
| | - Lien A Phung
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, USA
| | - Ewa Prochniewicz
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, USA
| | - Sarah Lichtenberger
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, USA
| | - Anna Wilson
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, USA
| | - David D Thomas
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, USA .,Photonic Pharma LLC, Minneapolis, Minnesota, USA
| |
Collapse
|
36
|
Parker F, Baboolal TG, Peckham M. Actin Mutations and Their Role in Disease. Int J Mol Sci 2020; 21:ijms21093371. [PMID: 32397632 PMCID: PMC7247010 DOI: 10.3390/ijms21093371] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/06/2020] [Accepted: 05/07/2020] [Indexed: 12/15/2022] Open
Abstract
Actin is a widely expressed protein found in almost all eukaryotic cells. In humans, there are six different genes, which encode specific actin isoforms. Disease-causing mutations have been described for each of these, most of which are missense. Analysis of the position of the resulting mutated residues in the protein reveals mutational hotspots. Many of these occur in regions important for actin polymerization. We briefly discuss the challenges in characterizing the effects of these actin mutations, with a focus on cardiac actin mutations.
Collapse
|
37
|
Long-Range and Directional Allostery of Actin Filaments Plays Important Roles in Various Cellular Activities. Int J Mol Sci 2020; 21:ijms21093209. [PMID: 32370032 PMCID: PMC7246755 DOI: 10.3390/ijms21093209] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/27/2020] [Accepted: 04/30/2020] [Indexed: 12/18/2022] Open
Abstract
A wide variety of uniquely localized actin-binding proteins (ABPs) are involved in various cellular activities, such as cytokinesis, migration, adhesion, morphogenesis, and intracellular transport. In a micrometer-scale space such as the inside of cells, protein molecules diffuse throughout the cell interior within seconds. In this condition, how can ABPs selectively bind to particular actin filaments when there is an abundance of actin filaments in the cytoplasm? In recent years, several ABPs have been reported to induce cooperative conformational changes to actin filaments allowing structural changes to propagate along the filament cables uni- or bidirectionally, thereby regulating the subsequent binding of ABPs. Such propagation of ABP-induced cooperative conformational changes in actin filaments may be advantageous for the elaborate regulation of cellular activities driven by actin-based machineries in the intracellular space, which is dominated by diffusion. In this review, we focus on long-range allosteric regulation driven by cooperative conformational changes of actin filaments that are evoked by binding of ABPs, and discuss roles of allostery of actin filaments in narrow intracellular spaces.
Collapse
|
38
|
Wang Q, Hu Z, Chang X, Yu M, Xie Z, Lv H, Zhang W, Xiong H, Yuan Y, Wang Z. Mutational and clinical spectrum in a cohort of Chinese patients with hereditary nemaline myopathy. Clin Genet 2020; 97:878-889. [PMID: 32222963 DOI: 10.1111/cge.13745] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/23/2020] [Accepted: 03/23/2020] [Indexed: 12/12/2022]
Abstract
Hereditary nemaline myopathy (NM) is one of the most common congenital myopathies with the histopathological findings of nemaline bodies. We used targeted next-generation sequencing to identify causative mutations in 48 NM patients with confirmed myopathological diagnosis, analyze the mutational spectrum and phenotypic features. Furthermore, reverse transcription polymerase chain reaction (RT-PCR) was used to confirm the pathogenic effect of one nebulin (NEB) splicing variant. The results showed that variants were found in five NM-associated genes, including NEB, actin alpha 1 (ACTA1), troponin T1, Kelch repeat and BTB domain-containing 13, and cofilin-2, in 34 (73.9%), 7 (15.2%), 3 (6.5%), 1 (2.2%), and 1 (2.2%) patients, respectively, in a total of 46/48 (95.8%) NM patients. Of the total 64 variants identified, 51 were novel variants including 26 pathogenic, 1 probably pathogenic, and 24 variant of uncertain significance (VUS). Notably, one NEB splicing mutation, c.21417+3A>G causing exon 144 splicing (NM_001164508.1), as confirmed by RT-PCR, was found in 52.9% (18 patients) of NEB variant-carrying patients. Typical congenital NM, the most common clinical subtype (60.4%), was associated with five NM genes. We concluded that hereditary NM showed a highly variable genetic spectrum. NEB was the most frequent causative gene in this Chinese cohort, followed by ACTA1. We found a hotspot splicing mutation in NEB among Chinese cohort.
Collapse
Affiliation(s)
- Qi Wang
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Zhenxian Hu
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Xingzhi Chang
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Meng Yu
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Zhiying Xie
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - He Lv
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Wei Zhang
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Hui Xiong
- Department of Pediatrics, Peking University First Hospital, Beijing, China
| | - Yun Yuan
- Department of Neurology, Peking University First Hospital, Beijing, China
| | - Zhaoxia Wang
- Department of Neurology, Peking University First Hospital, Beijing, China
| |
Collapse
|
39
|
Mc Glacken-Byrne AB, Prentice D, Roshandel D, Brown MR, Tuch P, Yau KSY, Sivadorai P, Davis MR, Laing NG, Chen FK. High-resolution iris and retinal imaging in multisystemic smooth muscle dysfunction syndrome due to a novel Asn117Lys substitution in ACTA2: a case report. BMC Ophthalmol 2020; 20:68. [PMID: 32093627 PMCID: PMC7038593 DOI: 10.1186/s12886-020-01344-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 02/17/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Congenital mydriasis and retinal arteriolar tortuosity are associated with the life-threatening multisystemic smooth muscle dysfunction syndrome (MSMDS) due to mutations in the gene, ACTA2, which encodes alpha-smooth muscle actin (α-SMA). Previous reports attributed MSMDS-related congenital mydriasis to the absence of iris sphincter muscle. Similarly, it has been hypothesized that abnormal proliferation of the vascular smooth muscle cells causes the marked tortuosity of retinal arterioles in MSMDS. In this report, high-resolution ocular imaging reveals unexpected findings that reject previous hypotheses. CASE PRESENTATION The proband is a 37-year-old female with a history of neonatal patent ductus arteriosus (PDA) ligation, left-sided choreiform movements at the age of 11 and a transient aphasia with right-sided weakness at the age of 30. Her older sister also had PDA ligation and congenital mydriasis but no neurological deficit up to age 41. Magnetic resonance angiogram demonstrated cerebrovascular lesions resembling but distinct from Moyamoya disease, characterised by internal carotid artery dilatation, terminal segment stenosis and absent basal collaterals. Their mother had poorly reactive pupils with asymptomatic cerebral arteriopathy resembling her daughters. All three had prominent retinal arteriolar tortuosity. The daughters were heterozygous and the mother was a somatic mosaic for a novel c.351C > G (p.Asn117Lys) transversion in ACTA2. Iris optical coherence tomography (OCT) showed a hyporeflective band anterior to the pigment epithelium indicating the presence of dysfunctional sphincter muscle. Adaptive optics retinal imaging showed no thickening of the arteriolar vessel wall whilst OCT angiography showed extreme corkscrew course of arterioles suggesting vessel elongation. CONCLUSIONS In addition to the known association between Met46, Arg179 and Arg258 substitutions and ACTA2-related arteriopathy, this case illustrates the possibility that Asn117 also plays an important role in α-SMA function within the cerebrovascular smooth muscle cell. MSMDS-related congenital mydriasis is due to reduced iris sphincter contractility rather than its absence. Retinal arteriolar tortuosity might be due to longitudinal proliferation of arteriolar smooth muscle cells. The described cerebrovascular and ocular signs are consistent with predicted effects of the novel Asn117Lys substitution in ACTA2.
Collapse
Affiliation(s)
- Aisling B Mc Glacken-Byrne
- Centre for Ophthalmology and Visual Science (incorporating Lions Eye Institute), The University of Western Australia, 2 Verdun Street, Nedlands, WA, 6009, Australia
| | - David Prentice
- Department of General Medicine, Royal Perth Hospital, Perth, Western Australia, Australia.,Perron Institute, Nedlands, Western Australia, Australia
| | - Danial Roshandel
- Centre for Ophthalmology and Visual Science (incorporating Lions Eye Institute), The University of Western Australia, 2 Verdun Street, Nedlands, WA, 6009, Australia
| | - Michael R Brown
- Centre for Ophthalmology and Visual Science (incorporating Lions Eye Institute), The University of Western Australia, 2 Verdun Street, Nedlands, WA, 6009, Australia
| | - Philip Tuch
- Hollywood Medical Centre, Nedlands, Western Australia, Australia
| | - Kyle S-Y Yau
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, Western Australia, Australia
| | - Padma Sivadorai
- Department of Diagnostic Genomics, PathWest Laboratory Medicine, QEII Medical Centre, Nedlands, Western Australia, Australia
| | - Mark R Davis
- Department of Diagnostic Genomics, PathWest Laboratory Medicine, QEII Medical Centre, Nedlands, Western Australia, Australia
| | - Nigel G Laing
- Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, Western Australia, Australia.,Department of Diagnostic Genomics, PathWest Laboratory Medicine, QEII Medical Centre, Nedlands, Western Australia, Australia.,Centre for Medical Research, The University of Western Australia, Crawley, Western Australia, Australia
| | - Fred K Chen
- Centre for Ophthalmology and Visual Science (incorporating Lions Eye Institute), The University of Western Australia, 2 Verdun Street, Nedlands, WA, 6009, Australia. .,Department of Ophthalmology, Royal Perth Hospital, Perth, Western Australia, Australia. .,Department of Ophthalmology, Perth Children's Hospital, Nedlands, Western Australia, Australia.
| |
Collapse
|
40
|
Romanelli G, Varela R, Benech JC. Diabetes induces differences in the F-actin spatial organization of striated muscles. Cytoskeleton (Hoboken) 2020; 77:202-213. [PMID: 32020777 DOI: 10.1002/cm.21600] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 11/05/2019] [Accepted: 12/17/2019] [Indexed: 12/23/2022]
Abstract
Studies have shown the cytoskeleton disorganization produced by diabetes and quantified F-actin fluorescence in the striated muscles of diabetic animals. However, at present, there are no studies that have quantified F-actin spatial organization (F-actin-SO). Through our research, we analyzed the effect of diabetes on F-actin-SO in the cardiac and skeletal muscles of a mouse model. The muscle samples were labeled with phalloidin-rhodamine and analyzed with confocal microscopy. The analysis was done in two dimensions using four approaches: quantitation of (a) phalloidin-occupied areas; (b) number of F-actin-unoccupied areas per muscular fiber; (c) F-actin filament discontinuity; and (d) costamere periodicity. Our results showed that both the cardiac and skeletal muscles of the control mice had more phalloidin-occupied areas than the diabetic mice. The skeletal muscles had a significantly higher number of F-actin-unoccupied areas per muscular fiber and more F-actin discontinuities. Additionally, using western blot analyses, we showed that those differences were not due to α-actin protein expression. Finally, we considered the importance of these findings in dysfunctional contraction, disassembly in cell-cell communication, conduction of muscle impulse, and changes in cell nanomechanics. Our results quantitatively demonstrated that diabetes severely affects F-actin-SO in striated muscles.
Collapse
Affiliation(s)
- Gerardo Romanelli
- Laboratorio de Señalización Celular y Nanobiología, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Montevideo, Uruguay
| | - Rocío Varela
- Laboratorio de Señalización Celular y Nanobiología, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Montevideo, Uruguay
| | - Juan C Benech
- Laboratorio de Señalización Celular y Nanobiología, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Montevideo, Uruguay
| |
Collapse
|
41
|
Reza N, Garg A, Merrill SL, Chowns JL, Rao S, Owens AT. ACTA1 Novel Likely Pathogenic Variant in a Family With Dilated Cardiomyopathy. CIRCULATION-GENOMIC AND PRECISION MEDICINE 2019; 11:e002243. [PMID: 30354303 DOI: 10.1161/circgen.118.002243] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Nosheen Reza
- Division of Cardiovascular Medicine, Department of Medicine, Center for Inherited Cardiovascular Disease (N.R., S.L.M., J.L.C., A.T.O.), Perelman School of Medicine at the University of Pennsylvania, Philadelphia
| | - Ankit Garg
- Department of Medicine (A.G.), Perelman School of Medicine at the University of Pennsylvania, Philadelphia
| | - Shana L Merrill
- Division of Cardiovascular Medicine, Department of Medicine, Center for Inherited Cardiovascular Disease (N.R., S.L.M., J.L.C., A.T.O.), Perelman School of Medicine at the University of Pennsylvania, Philadelphia
| | - Jessica L Chowns
- Division of Cardiovascular Medicine, Department of Medicine, Center for Inherited Cardiovascular Disease (N.R., S.L.M., J.L.C., A.T.O.), Perelman School of Medicine at the University of Pennsylvania, Philadelphia
| | - Sriram Rao
- Division of Cardiovascular Medicine, Department of Medicine (S.R.), Perelman School of Medicine at the University of Pennsylvania, Philadelphia
| | - Anjali Tiku Owens
- Division of Cardiovascular Medicine, Department of Medicine, Center for Inherited Cardiovascular Disease (N.R., S.L.M., J.L.C., A.T.O.), Perelman School of Medicine at the University of Pennsylvania, Philadelphia
| |
Collapse
|
42
|
Sewry CA, Laitila JM, Wallgren-Pettersson C. Nemaline myopathies: a current view. J Muscle Res Cell Motil 2019; 40:111-126. [PMID: 31228046 PMCID: PMC6726674 DOI: 10.1007/s10974-019-09519-9] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 05/29/2019] [Indexed: 12/13/2022]
Abstract
Nemaline myopathies are a heterogenous group of congenital myopathies caused by de novo, dominantly or recessively inherited mutations in at least twelve genes. The genes encoding skeletal α-actin (ACTA1) and nebulin (NEB) are the commonest genetic cause. Most patients have congenital onset characterized by muscle weakness and hypotonia, but the spectrum of clinical phenotypes is broad, ranging from severe neonatal presentations to onset of a milder disorder in childhood. Most patients with adult onset have an autoimmune-related myopathy with a progressive course. The wide application of massively parallel sequencing methods is increasing the number of known causative genes and broadening the range of clinical phenotypes. Nemaline myopathies are identified by the presence of structures that are rod-like or ovoid in shape with electron microscopy, and with light microscopy stain red with the modified Gömöri trichrome technique. These rods or nemaline bodies are derived from Z lines (also known as Z discs or Z disks) and have a similar lattice structure and protein content. Their shape in patients with mutations in KLHL40 and LMOD3 is distinctive and can be useful for diagnosis. The number and distribution of nemaline bodies varies between fibres and different muscles but does not correlate with severity or prognosis. Additional pathological features such as caps, cores and fibre type disproportion are associated with the same genes as those known to cause the presence of rods. Animal models are advancing the understanding of the effects of various mutations in different genes and paving the way for the development of therapies, which at present only manage symptoms and are aimed at maintaining muscle strength, joint mobility, ambulation, respiration and independence in the activities of daily living.
Collapse
Affiliation(s)
- Caroline A Sewry
- Dubowitz Neuromuscular Centre, UCL Institute of Child Health and Great Ormond Street Hospital, 30 Guilford Street, London, WC1N 1EH, UK. .,Wolfson Centre of Inherited Neuromuscular Disorders, RJAH Orthopaedic Hospital, Oswestry, SY10 7AG, UK.
| | - Jenni M Laitila
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland.,Department of Medical and Clinical Genetics, Medicum, University of Helsinki, Helsinki, Finland
| | - Carina Wallgren-Pettersson
- Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland.,Department of Medical and Clinical Genetics, Medicum, University of Helsinki, Helsinki, Finland
| |
Collapse
|
43
|
Abstract
The congenital myopathies form a large clinically and genetically heterogeneous group of disorders. Currently mutations in at least 27 different genes have been reported to cause a congenital myopathy, but the number is expected to increase due to the accelerated use of next-generation sequencing methods. There is substantial overlap between the causative genes and the clinical and histopathologic features of the congenital myopathies. The mode of inheritance can be autosomal recessive, autosomal dominant or X-linked. Both dominant and recessive mutations in the same gene can cause a similar disease phenotype, and the same clinical phenotype can also be caused by mutations in different genes. Clear genotype-phenotype correlations are few and far between.
Collapse
Affiliation(s)
- Katarina Pelin
- Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland; The Folkhälsan Institute of Genetics, Folkhälsan Research Center, and Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland.
| | - Carina Wallgren-Pettersson
- The Folkhälsan Institute of Genetics, Folkhälsan Research Center, and Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
| |
Collapse
|
44
|
Saade DN, Neuhaus SB, Foley AR, Bönnemann CG. The Use of Muscle Ultrasound in the Diagnosis and Differential Diagnosis of Congenital Disorders of Muscle in the Age of Next Generation Genetics. Semin Pediatr Neurol 2019; 29:44-54. [PMID: 31060725 DOI: 10.1016/j.spen.2019.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Congenital disorders of muscle most importantly encompass the congenital muscular dystrophies as well as the congenital myopathies. With the broader availability of next generation genetic testing there has been an expansion of phenotypes and genotypes, while the very large genes such as titin, nebulin, and RYR1 have also become accessible to complete sequencing. This development has had considerable diagnostic power while at the same time also creating challenges in the interpretation of the many variants of uncertain significance that will need a solid clinical plausibility test, based on "deep" phenotyping, taking into account clinical, extended clinical, histological, and physiological data. One tool in this context is imaging of skeletal muscle, including by ultrasound. Muscle ultrasound is a useful, noninvasive, child-friendly technique for visualizing normal and pathological skeletal muscle. By virtue of its different mode of image acquisition compared to muscle MRI, it allows for the assessment of different and often earlier changes, also circumventing the need for sedation. Herein we highlight the important role of muscle ultrasound as a diagnostic tool and an extension of the physical exam in the work-up of congenital onset muscle disease, presenting various relevant clinical scenarios. We show how muscle ultrasound can confirm or refute skeletal muscle involvement and yield information about the nature of the involvement (myopathic vs neurogenic). Muscle ultrasound can also guide the appropriate next diagnostic steps and recognize diagnostically important qualitative patterns to help confirm or refute genetic considerations raised by next generation sequencing. We illustrate specific muscle ultrasound involvement patterns, which constitute accessible diagnostic hints and show that muscle ultrasound, in conjunction with the clinical phenotype, the histological appearance of the muscle biopsy (when available), and the ascertained genotype, can be a very powerful tool in integrating all available information into a final accurate and precise diagnosis in the age of next generation sequencing.
Collapse
Affiliation(s)
- Dimah N Saade
- Neuromuscular and Neurogenetic Disorders of Childhood Section, Neurogenetics Branch, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA
| | - Sarah B Neuhaus
- Neuromuscular and Neurogenetic Disorders of Childhood Section, Neurogenetics Branch, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA
| | - A Reghan Foley
- Neuromuscular and Neurogenetic Disorders of Childhood Section, Neurogenetics Branch, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA
| | - Carsten G Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, Neurogenetics Branch, National Institute of Neurological Disorders and Stroke, NIH, Bethesda, MD, USA.
| |
Collapse
|
45
|
Umeki N, Shibata K, Noguchi TQP, Hirose K, Sako Y, Uyeda TQP. K336I mutant actin alters the structure of neighbouring protomers in filaments and reduces affinity for actin-binding proteins. Sci Rep 2019; 9:5353. [PMID: 30926871 PMCID: PMC6441083 DOI: 10.1038/s41598-019-41795-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 03/18/2019] [Indexed: 12/16/2022] Open
Abstract
Mutation of the Lys-336 residue of actin to Ile (K336I) or Asp (K336E) causes congenital myopathy. To understand the effect of this mutation on the function of actin filaments and gain insight into the mechanism of disease onset, we prepared and biochemically characterised K336I mutant actin from Dictyostelium discoideum. Subtilisin cleavage assays revealed that the structure of the DNase-I binding loop (D-loop) of monomeric K336I actin, which would face the adjacent actin-protomer in filaments, differed from that of wild type (WT) actin. Although K336I actin underwent normal salt-dependent reversible polymerisation and formed apparently normal filaments, interactions of K336I filaments with alpha-actinin, myosin II, and cofilin were disrupted. Furthermore, co-filaments of K336I and WT actins also exhibited abnormal interactions with cofilin, implying that K336I actin altered the structure of the neighbouring WT actin protomers such that interaction between cofilin and the WT actin protomers was prevented. We speculate that disruption of the interactions between co-filaments and actin-binding proteins is the primary reason why the K336I mutation induces muscle disease in a dominant fashion.
Collapse
Affiliation(s)
- Nobuhisa Umeki
- Cellular Informatics Lab., RIKEN, Wako, Saitama, 351-0198, Japan. .,Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8562, Japan.
| | - Keitaro Shibata
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8562, Japan.,Advanced ICT Research Institute, National Institute of Information and Communications Technology (NICT), Kobe, Hyogo, 651-2492, Japan
| | - Taro Q P Noguchi
- National Institute of Technology, Miyakonojo College, Miyakonojo, Miyazaki, 885-8567, Japan
| | - Keiko Hirose
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8562, Japan
| | - Yasushi Sako
- Cellular Informatics Lab., RIKEN, Wako, Saitama, 351-0198, Japan
| | - Taro Q P Uyeda
- Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, 305-8562, Japan.,Department of Physics, Waseda University, Shinjuku, Tokyo, 169-8555, Japan
| |
Collapse
|
46
|
Gomes F, Watanabe L, Vianez J, Nunes M, Cardoso J, Lima C, Schneider H, Sampaio I. Comparative analysis of the transcriptome of the Amazonian fish species Colossoma macropomum (tambaqui) and hybrid tambacu by next generation sequencing. PLoS One 2019; 14:e0212755. [PMID: 30802266 PMCID: PMC6388931 DOI: 10.1371/journal.pone.0212755] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 02/10/2019] [Indexed: 12/13/2022] Open
Abstract
Background The C. macropomum is a characiform fish from the Amazon basin that has been hybridized with other pacu species to produce commercial hybrids, such as the tambacu. However, little is known of the functional genomics of the parental species or these hybrid forms. The transcriptome of C. macropomum and tambacu were sequenced using 454 Roche platform (pyrosequencing) techniques to characterize the domains of Gene Ontology (GO) and to evaluate the levels of gene expression in the two organisms. Results The 8,188,945 reads were assembled into 400,845 contigs. A total of 58,322 contigs were annotated with a predominance of biological processes for both organisms, as determined by Gene Ontology (GO). Similar numbers of metabolic pathways were identified in both the C. macropomum and the tambacu, with the metabolism category presenting the largest number of transcripts. The BUSCO analysis indicated that our assembly was more than 40% complete. We identified 21,986 genes for the two fishes. The P and Log2FC values indicated significant differences in the levels of gene expression, with a total of 600 up-regulated genes. Conclusion In spite of the lack of a reference genome, the functional annotation was successful, and confirmed a considerable difference in the specificity and levels of gene expression between the two organisms. This report provides a comprehensive baseline for the genetic management of these commercially important fishes, in particular for the identification of specific genes that may represent markers involved in the immunity, growth, and fertility of these organisms, with potential practical applications in aquaculture management.
Collapse
Affiliation(s)
- Fátima Gomes
- Institute of Coastal Studies, Laboratory of Genetics and Molecular Biology, Universidade Federal do Pará, Campus de Bragança, Alameda Leandro Ribeiro, Bragança, PA, Brazil
- * E-mail:
| | - Luciana Watanabe
- Institute of Coastal Studies, Laboratory of Genetics and Molecular Biology, Universidade Federal do Pará, Campus de Bragança, Alameda Leandro Ribeiro, Bragança, PA, Brazil
| | - João Vianez
- Center for Technological Innovation, Evandro Chagas Institute, Ministry of Health, Ananindeua, PA, Brazil
| | - Márcio Nunes
- Center for Technological Innovation, Evandro Chagas Institute, Ministry of Health, Ananindeua, PA, Brazil
| | - Jedson Cardoso
- Center for Technological Innovation, Evandro Chagas Institute, Ministry of Health, Ananindeua, PA, Brazil
- Postgraduate Program in Virology (PPGV), Evandro Chagas Institute, Ministry of Health, Ananindeua, PA, Brazil
| | - Clayton Lima
- Center for Technological Innovation, Evandro Chagas Institute, Ministry of Health, Ananindeua, PA, Brazil
| | - Horacio Schneider
- Institute of Coastal Studies, Laboratory of Genetics and Molecular Biology, Universidade Federal do Pará, Campus de Bragança, Alameda Leandro Ribeiro, Bragança, PA, Brazil
| | - Iracilda Sampaio
- Institute of Coastal Studies, Laboratory of Genetics and Molecular Biology, Universidade Federal do Pará, Campus de Bragança, Alameda Leandro Ribeiro, Bragança, PA, Brazil
| |
Collapse
|
47
|
Zhang ZK, Li J, Guan D, Liang C, Zhuo Z, Liu J, Lu A, Zhang G, Zhang BT. Long Noncoding RNA lncMUMA Reverses Established Skeletal Muscle Atrophy following Mechanical Unloading. Mol Ther 2018; 26:2669-2680. [PMID: 30415659 PMCID: PMC6225098 DOI: 10.1016/j.ymthe.2018.09.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 09/13/2018] [Accepted: 09/14/2018] [Indexed: 12/26/2022] Open
Abstract
Reversing established muscle atrophy following mechanical unloading is of great clinical challenge. Long noncoding RNAs (lncRNAs) have been demonstrated to play important roles in myogenesis. Here we identified a lncRNA (mechanical unloading-induced muscle atrophy-related lncRNA [lncMUMA]) enriched in muscle, which was the most downregulated lncRNA during muscle atrophy development in hindlimb suspension (HLS) mice. The in vitro and in vivo data demonstrated that the decreased expression levels of lncMUMA closely associated with a reduction of myogenesis during mechanical unloading. Mechanistically, lncMUMA promoted myogenic differentiation by functioning as a miR-762 sponge to regulate the core myogenic regulator MyoD in vitro. The enforced expression of lncMUMA relieved the decreases in MyoD protein and muscle mass in miR-762 knockin mice. Therapeutically, the enforced expression of lncMUMA improved the in vitro myogenic differentiation of myoblasts under microgravity simulation, prevented the muscle atrophy development, and reversed the established muscle atrophy in HLS mice. These findings identify lncMUMA as an anabolic regulator to reverse established muscle atrophy following mechanical unloading.
Collapse
Affiliation(s)
- Zong-Kang Zhang
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Jie Li
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Daogang Guan
- Institute of Integrated Bioinformedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, China
| | - Chao Liang
- Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, China
| | - Zhenjian Zhuo
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China
| | - Jin Liu
- Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, China
| | - Aiping Lu
- Institute of Integrated Bioinformedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, China
| | - Ge Zhang
- Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, China.
| | - Bao-Ting Zhang
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, China.
| |
Collapse
|
48
|
The Molecular Mechanisms of Mutations in Actin and Myosin that Cause Inherited Myopathy. Int J Mol Sci 2018; 19:ijms19072020. [PMID: 29997361 PMCID: PMC6073311 DOI: 10.3390/ijms19072020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 07/06/2018] [Accepted: 07/08/2018] [Indexed: 12/23/2022] Open
Abstract
The discovery that mutations in myosin and actin genes, together with mutations in the other components of the muscle sarcomere, are responsible for a range of inherited muscle diseases (myopathies) has revolutionized the study of muscle, converting it from a subject of basic science to a relevant subject for clinical study and has been responsible for a great increase of interest in muscle studies. Myopathies are linked to mutations in five of the myosin heavy chain genes, three of the myosin light chain genes, and three of the actin genes. This review aims to determine to what extent we can explain disease phenotype from the mutant genotype. To optimise our chances of finding the right mechanism we must study a myopathy where there are a large number of different mutations that cause a common phenotype and so are likely to have a common mechanism: a corollary to this criterion is that if any mutation causes the disease phenotype but does not correspond to the proposed mechanism, then the whole mechanism is suspect. Using these criteria, we consider two cases where plausible genotype-phenotype mechanisms have been proposed: the actin “A-triad” and the myosin “mesa/IHD” models.
Collapse
|
49
|
Zhang ZK, Li J, Guan D, Liang C, Zhuo Z, Liu J, Lu A, Zhang G, Zhang BT. A newly identified lncRNA MAR1 acts as a miR-487b sponge to promote skeletal muscle differentiation and regeneration. J Cachexia Sarcopenia Muscle 2018; 9:613-626. [PMID: 29512357 PMCID: PMC5989759 DOI: 10.1002/jcsm.12281] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 11/06/2017] [Accepted: 12/07/2017] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Skeletal muscle atrophy induced by either aging (sarcopenia) or mechanical unloading is associated with serious health consequences. Long non-coding RNAs (lncRNAs) are implicated as important regulators in numerous physiological and pathological processes. METHODS Microarray analysis was performed to identify the differentially expressed lncRNAs in skeletal muscle between adult and aged mice. The most decreased lncRNA in aged skeletal muscle was identified. The C2C12 mouse myoblast cells were used to assess the biological function of the lncRNA in vitro. The target microRNA of lncRNA and the target protein of microRNA were predicted by bioinformatics analysis and validated in vitro. Furthermore, the biology function of the lncRNA in vivo was investigated by local overexpression or knockdown the lncRNA in skeletal muscle. The therapeutic effect of the lncRNA overexpression in age-related or mechanical unloading-induced muscle atrophy was also evaluated. RESULTS We identified a novel lncRNA (muscle anabolic regulator 1, MAR1) which was highly expressed in mice skeletal muscle and positively correlated with muscle differentiation and growth in vitro and in vivo. We predicted and validated that microRNA-487b (miR-487b) was a direct target of MAR1. We also predicted and validated that Wnt5a, an important regulator during myogenesis, was a target of miR-487b in C2C12 cells. Our findings further demonstrated that enforced MAR1 expression in myoblasts led to derepression of Wnt5a. Moreover, MAR1 promoted skeletal muscle mass/strength and Wnt5a protein level in mice. Enforced MAR1 expression in mice attenuated muscle atrophy induced by either aging or unloading. CONCLUSIONS The newly identified lncRNA MAR1 acts as a miR-487b sponge to regulate Wnt5a protein, resulting in promoting muscle differentiation and regeneration. MAR1 could be a novel therapeutic target for treating muscle atrophy induced by either aging or mechanical unloading.
Collapse
Affiliation(s)
- Zong-Kang Zhang
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - Jie Li
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - Daogang Guan
- Institute of Integrated Bioinformedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
| | - Chao Liang
- Law Sau Fai Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
| | - Zhenjian Zhuo
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - Jin Liu
- Law Sau Fai Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
| | - Aiping Lu
- Institute of Integrated Bioinformedicine and Translational Science, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
| | - Ge Zhang
- Law Sau Fai Institute for Advancing Translational Medicine in Bone & Joint Diseases, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
| | - Bao-Ting Zhang
- School of Chinese Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, SAR, China
| |
Collapse
|
50
|
Sewry CA, Wallgren-Pettersson C. Myopathology in congenital myopathies. Neuropathol Appl Neurobiol 2018; 43:5-23. [PMID: 27976420 DOI: 10.1111/nan.12369] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 12/03/2016] [Indexed: 12/18/2022]
Abstract
Congenital myopathies are clinically and genetically a heterogeneous group of early onset neuromuscular disorders, characterized by hypotonia and muscle weakness. Clinical severity and age of onset are variable. Many patients are severely affected at birth while others have a milder, moderately progressive or nonprogressive phenotype. Respiratory weakness is a major clinical aspect that requires regular monitoring. Causative mutations in several genes have been identified that are inherited in a dominant, recessive or X-linked manner, or arise de novo. Muscle biopsies show characteristic pathological features such as nemaline rods/bodies, cores, central nuclei or caps. Small type 1 fibres expressing slow myosin are a common feature and may sometimes be the only abnormality. Small cores (minicores) devoid of mitochondria and areas showing variable myofibrillar disruption occur in several neuromuscular disorders including several forms of congenital myopathy. Muscle biopsies can also show more than one structural defect. There is considerable clinical, pathological and genetic overlap with mutations in one gene resulting in more than one pathological feature, and the same pathological feature being associated with defects in more than one gene. Increasing application of whole exome sequencing is broadening the clinical and pathological spectra in congenital myopathies, but pathology still has a role in clarifying the pathogenicity of gene variants as well as directing molecular analysis.
Collapse
Affiliation(s)
- C A Sewry
- Dubowitz Neuromuscular Centre, UCL Institute of Child Health and Great Ormond Street Hospital for Children, London, UK.,Wolfson Centre for Inherited Neuromuscular Diseases, RJAH Orthopaedic Hospital, Oswestry, UK
| | - C Wallgren-Pettersson
- The Folkhälsan Institute of Genetics and the Department of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland
| |
Collapse
|