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Gao Y, Peng L, Zhao C. MYH7 in cardiomyopathy and skeletal muscle myopathy. Mol Cell Biochem 2024; 479:393-417. [PMID: 37079208 DOI: 10.1007/s11010-023-04735-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 04/07/2023] [Indexed: 04/21/2023]
Abstract
Myosin heavy chain gene 7 (MYH7), a sarcomeric gene encoding the myosin heavy chain (myosin-7), has attracted considerable interest as a result of its fundamental functions in cardiac and skeletal muscle contraction and numerous nucleotide variations of MYH7 are closely related to cardiomyopathy and skeletal muscle myopathy. These disorders display significantly inter- and intra-familial variability, sometimes developing complex phenotypes, including both cardiomyopathy and skeletal myopathy. Here, we review the current understanding on MYH7 with the aim to better clarify how mutations in MYH7 affect the structure and physiologic function of sarcomere, thus resulting in cardiomyopathy and skeletal muscle myopathy. Importantly, the latest advances on diagnosis, research models in vivo and in vitro and therapy for precise clinical application have made great progress and have epoch-making significance. All the great advance is discussed here.
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Affiliation(s)
- Yuan Gao
- Department of Pediatrics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Lu Peng
- Department of Pediatrics, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Cuifen Zhao
- Department of Pediatrics, Qilu Hospital of Shandong University, Jinan, 250012, China.
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Naderi N, Mohsen-Pour N, Nilipour Y, Pourirahim M, Maleki M, Kalayinia S. A novel heterozygous missense MYH7 mutation potentially causes an autosomal dominant form of myosin storage myopathy with dilated cardiomyopathy. BMC Cardiovasc Disord 2023; 23:487. [PMID: 37794383 PMCID: PMC10552240 DOI: 10.1186/s12872-023-03538-8] [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: 07/22/2023] [Accepted: 09/27/2023] [Indexed: 10/06/2023] Open
Abstract
BACKGROUND The MYH7 gene, which encodes the slow/ß-cardiac myosin heavy chain, is mutated in myosin storage myopathy (MSM). The clinical spectrum of MSM is quite heterogeneous in that it ranges from cardiomyopathies to skeletal myopathies or a combination of both, depending on the affected region. In this study, we performed clinical and molecular examinations of the proband of an Iranian family with MSM in an autosomal dominant condition exhibiting proximal muscle weakness and dilated cardiomyopathy. METHODS Following thorough clinical and paraclinical examinations, whole-exome sequencing `was performed on the proband (II-5). Pathogenicity prediction of the candidate variant was performed through in-silico analysis. Co-segregation analysis of the WES data among the family members was carried out by PCR-based Sanger sequencing. RESULTS A novel heterozygous missense variant, MYH7 (NM_000257): c.C1888A: p.Pro630Thr, was found in the DNA of the proband and his children and confirmed by Sanger sequencing. The in-silico analysis revealed that p.Pro630Thr substitution was deleterious. The novel sequence variant fell within a highly conserved region of the head domain. Our findings expand the spectrum of MYH7 mutations. CONCLUSIONS This finding could improve genetic counseling and prenatal diagnosis in families with clinical manifestations associated with MYH7-related myopathy.
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Affiliation(s)
- Niloofar Naderi
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research Center, University of Medical Sciences, Tehran, Iran
| | - Neda Mohsen-Pour
- Zanjan Pharmaceutical Biotechnology Research Center, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Yalda Nilipour
- Pediatric pathology research center, Research institute for children's health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Maryam Pourirahim
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research Center, University of Medical Sciences, Tehran, Iran
| | - Majid Maleki
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research Center, University of Medical Sciences, Tehran, Iran
| | - Samira Kalayinia
- Cardiogenetic Research Center, Rajaie Cardiovascular Medical and Research Center, University of Medical Sciences, Tehran, Iran.
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Wang X, Liu H, Wang W, Sun Y, Zhang F, Guo L, Li J, Zhang W. Comparison of multifidus degeneration between scoliosis and lumbar disc herniation. BMC Musculoskelet Disord 2022; 23:891. [PMID: 36180878 PMCID: PMC9526284 DOI: 10.1186/s12891-022-05841-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 09/07/2022] [Indexed: 11/21/2022] Open
Abstract
Objective To assess and compare the pathological and radiological outcomes of multifidus degeneration in scoliosis and lumbar disc herniation patients. Methods We performed a retrospective review on 24 patients with scoliosis and 26 patients with lumbar disc herniation (LDH) in the Third Hospital of Hebei Medical University from January 2017 to March2021. The patients were divided into scoliosis group and LDH group according to the treatment. The MRI fatty infiltration rate (FIR) of multifidus and strength of back muscle were calculated to evaluate muscle condition. Multifidus biopsy samples were obtained during surgery in the affected side at L4 or L5 segment in LDH group and on the concavity side of apical vertebrae in scoliosis group. The biopsy fatty infiltration degree (FID) and FIR in two groups, the FIR of affected and unaffected side in LDH group, and the FIR of concavity and convexity side in scoliosis group were compared. The correlation between concavity-convexity FIR difference and cobb angle in scoliosis group, back muscle strength and FIR in LDH group, FID and FIR in both groups was calculated respectively. Results The FIR was higher in scoliosis group than in LDH group, higher in concavity side than convexity side in scoliosis group (both P < 0.05). The FID was higher in scoliosis group than in LDH group (P < 0.05). No significant difference was found between affected and unaffected side in LDH group (P > 0.05). There was a positive correlation between concavity-convexity FIR difference and cobb angle, FIR and FID (both P < 0.01). There was a negative correlation between back muscle strength and FIR (P < 0.01). The biopsy staining results showed that both two groups were found the existence of rimmed vacuoles, nuclear aggregation, and abnormal enzyme activity, indicating that the scoliosis and LDH may be associated with myogenic diseases. Conclusion The scoliosis patients showed more serious fatty infiltration than LDH patients and rare pathological findings were found in both diseases.
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Affiliation(s)
- Xianzheng Wang
- Department of Spinal Surgery, The Third Hospital of Hebei Medical University, 050000, Shijiazhuang, China
| | - Huanan Liu
- Department of Spinal Surgery, The Third Hospital of Hebei Medical University, 050000, Shijiazhuang, China
| | - Weijian Wang
- Department of Spinal Surgery, The Third Hospital of Hebei Medical University, 050000, Shijiazhuang, China
| | - Yapeng Sun
- Department of Spinal Surgery, The Third Hospital of Hebei Medical University, 050000, Shijiazhuang, China
| | - Fei Zhang
- Department of Spinal Surgery, The Third Hospital of Hebei Medical University, 050000, Shijiazhuang, China
| | - Lei Guo
- Department of Spinal Surgery, The Third Hospital of Hebei Medical University, 050000, Shijiazhuang, China
| | - Jiaqi Li
- Department of Spinal Surgery, The Third Hospital of Hebei Medical University, 050000, Shijiazhuang, China.
| | - Wei Zhang
- Department of Spinal Surgery, The Third Hospital of Hebei Medical University, 050000, Shijiazhuang, China.
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Garg B, Tomar N, Biswas A, Mehta N, Malhotra R. Understanding Musculoskeletal Disorders Through Next-Generation Sequencing. JBJS Rev 2022; 10:01874474-202204000-00001. [PMID: 35383688 DOI: 10.2106/jbjs.rvw.21.00165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
» An insight into musculoskeletal disorders through advancements in next-generation sequencing (NGS) promises to maximize benefits and improve outcomes through improved genetic diagnosis. » The primary use of whole exome sequencing (WES) for musculoskeletal disorders is to identify functionally relevant variants. » The current evidence has shown the superiority of NGS over conventional genotyping for identifying novel and rare genetic variants in patients with musculoskeletal disorders, due to its high throughput and low cost. » Genes identified in patients with scoliosis, osteoporosis, osteoarthritis, and osteogenesis imperfecta using NGS technologies are listed for further reference.
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Affiliation(s)
- Bhavuk Garg
- Department of Orthopaedics, All India Institute of Medical Sciences, New Delhi, India
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Wang Q, Yu M, Xie Z, Liu J, Wang Q, Lv H, Zhang W, Yuan Y, Wang Z. Mutational and clinical spectrum of centronuclear myopathy in 9 cases and a literature review of Chinese patients. Neurol Sci 2021; 43:2803-2811. [PMID: 34595679 DOI: 10.1007/s10072-021-05627-y] [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: 04/09/2021] [Accepted: 09/23/2021] [Indexed: 12/01/2022]
Abstract
Centronuclear myopathy (CNM) is a group of congenital myopathies with the histopathological findings of centralized nuclei in muscle fibres. In this study, we summarized the mutational spectrum and phenotypic features of nine Chinese patients with CNM and reanalysed the existing data on 32 CNM patients reported in China. In a cohort comprising nine patients, 14 variants were found in three CNM-related genes, including DNM2, RYR1, and TTN, in 4, 3, and 2 patients, respectively. Of the total 14 variants identified, nine were reported, and 5 were novel including one pathogenic, one likely pathogenic, and 3 of undetermined significance (VUS). Pathologically, we identified the percentage of muscle fibres with central nuclei was much higher in the DNM2-related CNM patients than that in other genetic type of CNM. Of the 32 genetic-diagnosed CNM patients previously reported from China, DNM2, MTM1, SPEG, RYR1, and MYH7 mutations accounted for 59.4%, 25.0%, 9.4%, 3.1%, and 3.1%, respectively. Notably, all of the 20 variants of DNM2 were missense mutations, and the missense mutations in exon 8 were found in 60.0% of DNM2 variants. The c.1106G > A/ p.R369Q (NM_001005360) occurred in 26.3% patients of this Chinese cohort with DNM2-CNM. In conclusion, CNM showed a highly variable genetic spectrum, with DNM2 as the most common causative gene in Chinese CNM patients.
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Affiliation(s)
- Qi Wang
- Department of Neurology, Peking University First Hospital, Xishiku St 8#, Xicheng District, Beijing, 100034, China
| | - Meng Yu
- Department of Neurology, Peking University First Hospital, Xishiku St 8#, Xicheng District, Beijing, 100034, China
| | - Zhiying Xie
- Department of Neurology, Peking University First Hospital, Xishiku St 8#, Xicheng District, Beijing, 100034, China
| | - Jing Liu
- Department of Neurology, Peking University First Hospital, Xishiku St 8#, Xicheng District, Beijing, 100034, China
| | - Qingqing Wang
- Department of Neurology, Peking University First Hospital, Xishiku St 8#, Xicheng District, Beijing, 100034, China
| | - He Lv
- Department of Neurology, Peking University First Hospital, Xishiku St 8#, Xicheng District, Beijing, 100034, China
| | - Wei Zhang
- Department of Neurology, Peking University First Hospital, Xishiku St 8#, Xicheng District, Beijing, 100034, China
| | - Yun Yuan
- Department of Neurology, Peking University First Hospital, Xishiku St 8#, Xicheng District, Beijing, 100034, China.,Beijing Key Laboratory of Neurovascular Disease Discovery, Beijing, 100034, China
| | - Zhaoxia Wang
- Department of Neurology, Peking University First Hospital, Xishiku St 8#, Xicheng District, Beijing, 100034, China. .,Beijing Key Laboratory of Neurovascular Disease Discovery, Beijing, 100034, China.
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Atemin S, Todorov T, Maver A, Chamova T, Georgieva B, Tincheva S, Pacheva I, Ivanov I, Taneva A, Zlatareva D, Tournev I, Guergueltcheva V, Gospodinova M, Chochkova L, Peterlin B, Mitev V, Todorova A. MYH7-related disorders in two Bulgarian families: Novel variants in the same region associated with different clinical manifestation and disease penetrance. Neuromuscul Disord 2021; 31:633-641. [PMID: 34053846 DOI: 10.1016/j.nmd.2021.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 04/04/2021] [Accepted: 04/19/2021] [Indexed: 11/17/2022]
Abstract
Pathogenic variants in MYH7 cause a wide range of cardiac and skeletal muscle diseases with childhood or adult onset. These include dilated and/or hypertrophic cardiomyopathy, left ventricular non-compaction cardiomyopathy, congenital myopathies with multi-minicores and myofiber type disproportion, myosin storage myopathy, Laing distal myopathy and others (scapulo-peroneal or limb-girdle muscle forms). Here we report the results from molecular genetic analyses (NGS and Sanger sequencing) of 4 patients in two families with variable neuromuscular phenotypes with or without cardiac involvement. Interestingly, variants in MYH7 gene appeared to be the cause in all the cases. A novel nonsense variant c.5746C>T, p.(Gln1916Ter) was found in the patient in Family 1 who deceased at the age of 2 years 4 months with the clinical diagnosis of dilated cardiomyopathy, whose father died before the age of 40 years, due to cardiac failure with clinical diagnosis of suspected limb-girdle muscular dystrophy. A splice acceptor variant c.5560-2A>C in MYH7 was detected in the second proband and her sister, with late onset distal myopathy without cardiac involvement. These different phenotypes (muscular involvement with severe cardiomyopathy and pure late onset neuromuscular phenotype without heart involvement) may result from novel MYH7 variants, which most probably impact the LMM (light meromyosin) domain's function of the mature protein.
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Affiliation(s)
- Slavena Atemin
- Department of Medical Chemistry and Biochemistry, Medical University Sofia, Sofia, Bulgaria; Genetic Medico-Diagnostic Laboratory "Genica", Sofia, Bulgaria.
| | - Tihomir Todorov
- Genetic Medico-Diagnostic Laboratory "Genica", Sofia, Bulgaria
| | - Ales Maver
- Clinical Institute of Medical Genetics, UMC Ljubljana, Šlajmerjeva 4, SI-1000 Ljubljana, Slovenia
| | - Teodora Chamova
- Department of Neurology, University hospital "Alexandrovska", Medical University Sofia, Sofia, Bulgaria
| | - Bilyana Georgieva
- Department of Medical Chemistry and Biochemistry, Medical University Sofia, Sofia, Bulgaria
| | - Savina Tincheva
- Genetic Medico-Diagnostic Laboratory "Genica", Sofia, Bulgaria
| | - Iliyana Pacheva
- Department of Pediatrics and Medical Genetics, Medical University - Plovdiv, Bulgaria; Department of Pediatrics, University Hospital "St. George", Plovdiv, Bulgaria
| | - Ivan Ivanov
- Department of Pediatrics and Medical Genetics, Medical University - Plovdiv, Bulgaria; Department of Pediatrics, University Hospital "St. George", Plovdiv, Bulgaria
| | - Ani Taneva
- Department of Neurology, University hospital "Alexandrovska", Medical University Sofia, Sofia, Bulgaria
| | - Dora Zlatareva
- Department of Diagnostic Imaging, University Hospital "Alexandrovska", Medical University, Sofia, Bulgaria
| | - Ivailo Tournev
- Department of Neurology, University hospital "Alexandrovska", Medical University Sofia, Sofia, Bulgaria; Department of Cognitive Science and Psychology, New Bulgarian University, Sofia, Bulgaria
| | | | | | - Lyubov Chochkova
- Department of Pediatrics and Medical Genetics, Medical University - Plovdiv, Bulgaria; Department of Pediatrics, University Hospital "St. George", Plovdiv, Bulgaria
| | - Borut Peterlin
- Clinical Institute of Medical Genetics, UMC Ljubljana, Šlajmerjeva 4, SI-1000 Ljubljana, Slovenia
| | - Vanyo Mitev
- Department of Medical Chemistry and Biochemistry, Medical University Sofia, Sofia, Bulgaria
| | - Albena Todorova
- Department of Medical Chemistry and Biochemistry, Medical University Sofia, Sofia, Bulgaria; Genetic Medico-Diagnostic Laboratory "Genica", Sofia, Bulgaria
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Yu M, Zhu Y, Lu Y, Lv H, Zhang W, Yuan Y, Wang Z. Clinical features and genotypes of Laing distal myopathy in a group of Chinese patients, with in-frame deletions of MYH7 as common mutations. Orphanet J Rare Dis 2020; 15:344. [PMID: 33298082 PMCID: PMC7727133 DOI: 10.1186/s13023-020-01626-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 11/26/2020] [Indexed: 11/24/2022] Open
Abstract
Background Laing distal myopathy is a rare autosomal dominant inherited distal myopathy caused by mutations of the MYH7 gene affecting mainly the rod region. We described the clinical features, muscle MRI and pathological changes as well as genetic mutations in a group of Chinese patients with Laing distal myopathy. Results Six patients with the confirmed diagnoses of Laing distal myopathy were recruited. Ankle dorsiflexion and finger extension weakness, as well as neck flexion weakness were common in our patients. Myopathic as well as neurogenic lesions were suggested by electromyography in different patients. Respiratory abnormality of sleep apnea was detected in two of our patients stressing the necessity of close respiratory monitoring in this disease. Muscle MRIs showed similar features of concentric fatty infiltration of anterior thigh muscles together with early involvement of tibialis anterior and extensor hallucis longus. However, muscle pathological presentations were varied depending on the biopsied muscles and the severity of the disease. In-frame deletions of the MYH7 gene made up 3/4 of mutations in our patients, suggesting that these are common mutations of Laing distal myopathy. Conclusions Our study further expanded the phenotypes and genotypes of Laing distal myopathy. In-frame deletions of the MYH7 gene are common causes of Laing distal myopathy.
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Affiliation(s)
- Meng Yu
- Department of Neurology, Peking University First Hospital, No. 8 Xishiku Street, Beijing, 100034, China
| | - Ying Zhu
- Department of Radiology, Peking University First Hospital, Beijing, China
| | - Yuanyuan Lu
- Department of Neurology, Peking University First Hospital, No. 8 Xishiku Street, Beijing, 100034, China
| | - He Lv
- Department of Neurology, Peking University First Hospital, No. 8 Xishiku Street, Beijing, 100034, China
| | - Wei Zhang
- Department of Neurology, Peking University First Hospital, No. 8 Xishiku Street, Beijing, 100034, China
| | - Yun Yuan
- Department of Neurology, Peking University First Hospital, No. 8 Xishiku Street, Beijing, 100034, China
| | - Zhaoxia Wang
- Department of Neurology, Peking University First Hospital, No. 8 Xishiku Street, Beijing, 100034, China.
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Papadimas GK, Xirou S, Kararizou E, Papadopoulos C. Update on Congenital Myopathies in Adulthood. Int J Mol Sci 2020; 21:ijms21103694. [PMID: 32456280 PMCID: PMC7279481 DOI: 10.3390/ijms21103694] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/17/2020] [Accepted: 05/19/2020] [Indexed: 12/11/2022] Open
Abstract
Congenital myopathies (CMs) constitute a group of heterogenous rare inherited muscle diseases with different incidences. They are traditionally grouped based on characteristic histopathological findings revealed on muscle biopsy. In recent decades, the ever-increasing application of modern genetic technologies has not just improved our understanding of their pathophysiology, but also expanded their phenotypic spectrum and contributed to a more genetically based approach for their classification. Later onset forms of CMs are increasingly recognised. They are often considered milder with slower progression, variable clinical presentations and different modes of inheritance. We reviewed the key features and genetic basis of late onset CMs with a special emphasis on those forms that may first manifest in adulthood.
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