1
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Karaś K, Pastwińska J, Sałkowska A, Karwaciak I, Ratajewski M. Epigenetic regulation of the human GDAP1 gene. Biochem Biophys Rep 2024; 40:101827. [PMID: 39328838 PMCID: PMC11426145 DOI: 10.1016/j.bbrep.2024.101827] [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: 07/30/2024] [Revised: 09/02/2024] [Accepted: 09/14/2024] [Indexed: 09/28/2024] Open
Abstract
Mutations in the ganglioside-induced differentiation-associated protein 1 (GDAP1) gene are linked to Charcot-Marie-Tooth (CMT) disease, a hereditary neurodegenerative condition. The protein encoded by this gene is involved in mitochondrial fission and calcium homeostasis. Recently, GDAP1 has also been implicated in the survival of patients with certain cancers. Despite its significant role in specific cellular processes and associated diseases, the mechanisms regulating GDAP1 expression are largely unknown. Here, we show for the first time that methylation of the CpG island in the proximal promoter of the GDAP1 gene inhibits its activity. Treating cells with low GDAP1 expression using methyltransferase and HDAC inhibitors induced the expression of this gene and its encoded protein. This induction was associated with promoter demethylation and increased association of acetylated histones with the GDAP1 promoter. Thus, we identified a mechanism that could be used to manipulate GDAP1 expression.
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Affiliation(s)
- Kaja Karaś
- Laboratory of Epigenetics, Institute of Medical Biology, Polish Academy of Sciences, Lodowa 106, 93-232, Lodz, Poland
| | - Joanna Pastwińska
- Laboratory of Epigenetics, Institute of Medical Biology, Polish Academy of Sciences, Lodowa 106, 93-232, Lodz, Poland
| | - Anna Sałkowska
- Laboratory of Epigenetics, Institute of Medical Biology, Polish Academy of Sciences, Lodowa 106, 93-232, Lodz, Poland
| | - Iwona Karwaciak
- Laboratory of Epigenetics, Institute of Medical Biology, Polish Academy of Sciences, Lodowa 106, 93-232, Lodz, Poland
| | - Marcin Ratajewski
- Laboratory of Epigenetics, Institute of Medical Biology, Polish Academy of Sciences, Lodowa 106, 93-232, Lodz, Poland
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2
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Wilhelm SDP, Moresco AA, Rivero AD, Siu VM, Heinemann IU. Characterization of a novel heterozygous variant in the histidyl-tRNA synthetase gene associated with Charcot-Marie-Tooth disease type 2W. IUBMB Life 2024. [PMID: 39352000 DOI: 10.1002/iub.2918] [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: 06/19/2024] [Accepted: 09/01/2024] [Indexed: 10/03/2024]
Abstract
Heterozygous pathogenic variants in the histidyl-tRNA synthetase (HARS) gene are associated with Charcot-Marie-Tooth (CMT) type 2W disease, classified as an axonal peripheral neuropathy. To date, at least 60 variants causing CMT symptoms have been identified in seven different aminoacyl-tRNA synthetases, with eight being found in the catalytic domain of HARS. The genetic data clearly show a causative role of aminoacyl-tRNA synthetases in CMT; however, the cellular mechanisms leading to pathology can vary widely and are unknown in the case of most identified variants. Here we describe a novel HARS variant, c.412T>C; p.Y138H, identified through a CMT gene panel in a patient with peripheral neuropathy. To determine the effect of p.Y138H we employed a humanized HARS yeast model and recombinant protein biochemistry, which identified a deficiency in protein dimerization and a growth defect which shows mild but significant improvement with histidine supplementation. This raises the potential for a clinical trial of histidine.
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Affiliation(s)
- Sarah D P Wilhelm
- Department of Biochemistry, The University of Western Ontario, London, Ontario, Canada
| | - Angelica A Moresco
- Division of Medical Genetics, Department of Paediatrics, The University of Western Ontario, London, Ontario, Canada
| | - Alberto D Rivero
- Institute for Neurological Research (FLENI), Buenos Aires, Argentina
| | - Victoria Mok Siu
- Division of Medical Genetics, Department of Paediatrics, The University of Western Ontario, London, Ontario, Canada
- Children's Health Research Institute, London, Ontario, Canada
| | - Ilka U Heinemann
- Department of Biochemistry, The University of Western Ontario, London, Ontario, Canada
- Children's Health Research Institute, London, Ontario, Canada
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3
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Li Z, Zeng S, Xie Y, Li X, Huang S, Zhao H, Cao W, Liu L, Wang M, Gong Q, Liu J, Rong P, Zhang R. Genetic and clinical profile of 15 Chinese families with GDAP1-related Charcot-Marie-Tooth disease and identification of H256R as a frequent mutation. J Peripher Nerv Syst 2024; 29:232-242. [PMID: 38705839 DOI: 10.1111/jns.12628] [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: 01/19/2024] [Revised: 04/20/2024] [Accepted: 04/23/2024] [Indexed: 05/07/2024]
Abstract
BACKGROUND AND AIMS Mutations in ganglioside-induced differentiation-associated protein 1 (GDAP1) cause axonal or demyelinating Charcot-Marie-Tooth disease (CMT) with autosomal dominant or recessive inheritance. In this study, we aim to report the genotypic and phenotypic features of GDAP1-related CMT in a Chinese cohort. METHODS Clinical, neurophysiological, genetic data, and available muscle/brain imaging information of 28 CMT patients with GDAP1 variants were retrospectively collected. RESULTS We identified 16 GDAP1 pathogenic variants, among which two novel variants c.980dup(p.L328FfsX25) and c.480+4T>G were first reported. Most patients (16/28) presented with AR or AD CMT2K phenotype. Clinical characteristics in our cohort demonstrated that the AR patients presented earlier onset, more severe phenotype compared with the AD patients. Considerable intra-familial phenotypic variability was observed among three AD families. Muscle atrophy and fatty infiltration in the lower extremity were detected by Muscle magnetic resonance imaging (MRI) scans in four patients. MRI showed two AR patients showed more severe muscle involvement of the posterior compartment than those of the anterolateral compartment in the calf. One patient carrying Q38*/H256R variants accompanied with mild periventricular leukoaraiosis. CONCLUSIONS In this study, we conducted an analysis of clinical features of the GDAP1-related CMT patients, expanded the mutation spectrum in GDAP1 by reporting two novel variants, and presented the prevalent occurrence of the H256R mutation in China. The screening of GDAP1 should be particularly emphasized in Chinese patients with CMT2, given the incomplete penetrance and pathogenic inheritance patterns involving dominant and recessive modes.
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Affiliation(s)
- Zhongzheng Li
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Sen Zeng
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Yongzhi Xie
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiaobo Li
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Shunxiang Huang
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Huadong Zhao
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Wanqian Cao
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Lei Liu
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
- Health Management Center, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Mengli Wang
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Qiaoyu Gong
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Jun Liu
- Department of Radiology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Pengfei Rong
- Department of Radiology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Ruxu Zhang
- Department of Neurology, The Third Xiangya Hospital, Central South University, Changsha, China
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4
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Grosz BR, Parmar JM, Ellis M, Bryen S, Simons C, Reis ALM, Stevanovski I, Deveson IW, Nicholson G, Laing N, Wallis M, Ravenscroft G, Kumar KR, Vucic S, Kennerson ML. A deep intronic variant in MME causes autosomal recessive Charcot-Marie-Tooth neuropathy through aberrant splicing. J Peripher Nerv Syst 2024; 29:262-274. [PMID: 38860315 DOI: 10.1111/jns.12637] [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: 04/10/2024] [Revised: 05/26/2024] [Accepted: 05/28/2024] [Indexed: 06/12/2024]
Abstract
BACKGROUND Loss-of-function variants in MME (membrane metalloendopeptidase) are a known cause of recessive Charcot-Marie-Tooth Neuropathy (CMT). A deep intronic variant, MME c.1188+428A>G (NM_000902.5), was identified through whole genome sequencing (WGS) of two Australian families with recessive inheritance of axonal CMT using the seqr platform. MME c.1188+428A>G was detected in a homozygous state in Family 1, and in a compound heterozygous state with a known pathogenic MME variant (c.467del; p.Pro156Leufs*14) in Family 2. AIMS We aimed to determine the pathogenicity of the MME c.1188+428A>G variant through segregation and splicing analysis. METHODS The splicing impact of the deep intronic MME variant c.1188+428A>G was assessed using an in vitro exon-trapping assay. RESULTS The exon-trapping assay demonstrated that the MME c.1188+428A>G variant created a novel splice donor site resulting in the inclusion of an 83 bp pseudoexon between MME exons 12 and 13. The incorporation of the pseudoexon into MME transcript is predicted to lead to a coding frameshift and premature termination codon (PTC) in MME exon 14 (p.Ala397ProfsTer47). This PTC is likely to result in nonsense mediated decay (NMD) of MME transcript leading to a pathogenic loss-of-function. INTERPRETATION To our knowledge, this is the first report of a pathogenic deep intronic MME variant causing CMT. This is of significance as deep intronic variants are missed using whole exome sequencing screening methods. Individuals with CMT should be reassessed for deep intronic variants, with splicing impacts being considered in relation to the potential pathogenicity of variants.
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Affiliation(s)
- Bianca R Grosz
- Northcott Neuroscience Laboratory, ANZAC Research Institute, Sydney, New South Wales, Australia
- The University of Sydney, Camperdown, New South Wales, Australia
| | - Jevin M Parmar
- Rare Disease Genetics and Functional Genomics Research Group, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, Western Australia, Australia
- Centre for Medical Research, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Melina Ellis
- Northcott Neuroscience Laboratory, ANZAC Research Institute, Sydney, New South Wales, Australia
- The University of Sydney, Camperdown, New South Wales, Australia
| | - Samantha Bryen
- Centre for Population Genomics, Garvan Institute of Medical Research, and UNSW Sydney, Sydney, New South Wales, Australia
- Centre for Population Genomics, Murdoch Children's Research Institute, Melbourne, Victoria, Australia
| | - Cas Simons
- Centre for Population Genomics, Garvan Institute of Medical Research, and UNSW Sydney, Sydney, New South Wales, Australia
- Centre for Population Genomics, Murdoch Children's Research Institute, Melbourne, Victoria, Australia
| | - Andre L M Reis
- Centre for Population Genomics, Garvan Institute of Medical Research, and UNSW Sydney, Sydney, New South Wales, Australia
- Genomics and Inherited Disease Program, Garvan Institute of Medical Research, Sydney, New South Wales, Australia
- Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Igor Stevanovski
- Centre for Population Genomics, Garvan Institute of Medical Research, and UNSW Sydney, Sydney, New South Wales, Australia
- Genomics and Inherited Disease Program, Garvan Institute of Medical Research, Sydney, New South Wales, Australia
| | - Ira W Deveson
- Centre for Population Genomics, Garvan Institute of Medical Research, and UNSW Sydney, Sydney, New South Wales, Australia
- Genomics and Inherited Disease Program, Garvan Institute of Medical Research, Sydney, New South Wales, Australia
- Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Garth Nicholson
- The University of Sydney, Camperdown, New South Wales, Australia
- Molecular Medicine Laboratory and Neurology Department, Concord Repatriation General Hospital, Concord, New South Wales, Australia
| | - Nigel Laing
- Rare Disease Genetics and Functional Genomics Research Group, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, Western Australia, Australia
| | - Mathew Wallis
- Tasmanian Clinical Genetics Service, Tasmanian Health Service, Hobart, Australia
- School of Medicine and Menzies Institute for Medical Research, University of Tasmania, Hobart, Australia
| | - Gianina Ravenscroft
- Rare Disease Genetics and Functional Genomics Research Group, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, Western Australia, Australia
| | - Kishore R Kumar
- The University of Sydney, Camperdown, New South Wales, Australia
- Molecular Medicine Laboratory and Neurology Department, Concord Repatriation General Hospital, Concord, New South Wales, Australia
- Translational Neurogenomics Group, Genomic and Inherited Disease Program, The Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
- St Vincent's Healthcare Campus, Faculty of Medicine, UNSW Sydney, Darlinghurst, New South Wales, Australia
| | - Steve Vucic
- The University of Sydney, Camperdown, New South Wales, Australia
- Brain and Nerve Research Centre, The University of Sydney, Sydney, New South Wales, Australia
| | - Marina L Kennerson
- Northcott Neuroscience Laboratory, ANZAC Research Institute, Sydney, New South Wales, Australia
- The University of Sydney, Camperdown, New South Wales, Australia
- Molecular Medicine Laboratory and Neurology Department, Concord Repatriation General Hospital, Concord, New South Wales, Australia
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5
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Du N, Wang X, Wang Z, Liu H, Liu H, Duan H, Zhao S, Banerjee S, Zhang X. Identification of a Novel Homozygous Mutation in MTMR2 Gene Causes Very Rare Charcot-Marie-Tooth Disease Type 4B1. Appl Clin Genet 2024; 17:71-84. [PMID: 38835974 PMCID: PMC11149649 DOI: 10.2147/tacg.s448084] [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: 11/26/2023] [Accepted: 05/01/2024] [Indexed: 06/06/2024] Open
Abstract
Background Charcot-Marie-Tooth disease (CMT) is a heterogeneous group of disorders involving peripheral nervous system. Charcot-Marie-Tooth disease 4B1 (CMT4B1) is a rare subtype of CMT. CMT4B1 is an axonal demyelinating polyneuropathy with an autosomal recessive mode of inheritance. Patients with CMT4B1 usually manifested with dysfunction of the motor and sensory systems which leads to gradual and progressive muscular weakness and atrophy, starting from the peroneal muscles and finally affecting the distal muscles. Germline mutations in MTMR2 gene causes CMT4B1. Material and Methods In this study, we investigated a 4-year-old Chinese boy with gradual and progressive weakness and atrophy of both proximal and distal muscles. The proband's parents did not show any abnormalities. Whole-exome sequencing and Sanger sequencing were performed. Results Whole-exome sequencing identified a novel homozygous nonsense mutation (c.118A>T; p.Lys40*) in exon 2 of MTMR2 gene in the proband. This novel mutation leads to the formation of a truncated MTMR2 protein of 39 amino acids instead of the wild- type MTMR2 protein of 643 amino acids. This mutation is predicted to cause the complete loss of the PH-GRAM domain, phosphatase domain, coiled-coil domain, and PDZ-binding motif of the MTMR2 protein. Sanger sequencing revealed that the proband's parents carried the mutation in a heterozygous state. This mutation was absent in 100 healthy control individuals. Conclusion This study reports the first mutation in MTMR2 associated with CMT4B1 in a Chinese population. Our study also showed the importance of whole-exome sequencing in identifying candidate genes and disease-causing variants in patients with CMT4B1.
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Affiliation(s)
- Nan Du
- Department of Medical Genetics, Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, Shaanxi, 710004, People's Republic of China
| | - Xiaolei Wang
- Department of Medical Genetics, Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, Shaanxi, 710004, People's Republic of China
| | - Zhaohui Wang
- Center for Children Health Care, Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, Shaanxi, 710004, People's Republic of China
| | - Hongwei Liu
- Department of Medical Genetics, Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, Shaanxi, 710004, People's Republic of China
| | - Hui Liu
- Department of Medical Genetics, Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, Shaanxi, 710004, People's Republic of China
| | - Hongfang Duan
- Department of Medical Genetics, Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, Shaanxi, 710004, People's Republic of China
| | - Shaozhi Zhao
- Department of Medical Genetics, Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, Shaanxi, 710004, People's Republic of China
| | - Santasree Banerjee
- Department of Genetics, College of Basic Medical Sciences, Jilin University, Changchun, Jilin, 130021, People's Republic of China
| | - Xinwen Zhang
- Department of Medical Genetics, Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, Shaanxi, 710004, People's Republic of China
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6
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Hamsho S, Almohamed A, Haydar H, Alsaffaf Y, Sultan E, Sukkar Y, kazkz W. Bilateral hearing impairment as an early symptom in a patient with Charcot-Marie-Tooth Type 1: the first case report from Syria. Ann Med Surg (Lond) 2024; 86:3139-3145. [PMID: 38694282 PMCID: PMC11060197 DOI: 10.1097/ms9.0000000000001979] [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: 02/23/2024] [Accepted: 03/08/2024] [Indexed: 05/04/2024] Open
Abstract
Introduction Charcot-Marie-Tooth (CMT) is a group of inherited neuromuscular disorders that vary clinically and genetically. It is characterized by peripheral nerve damage, leading to muscle weakness and sensory loss. Case presentation A 13-year-old male presented to the rheumatology department with bilateral hearing impairment since the age of 3 years, pes cavus, and difficulties walking. Some family members had Achilles tendon lengthening surgery. During physical examination, the patient had a shortened Achilles tendon, there are high arches in the feet, curled toes, loss of touch sensation in the feet, ankles, and legs, atrophy in the foot muscles. An eye examination revealed a discrepancy that needed glasses. Neurological findings included horizontal and vertical nystagmus, proprioception disorder, and demyelinating sensorimotor disorder diagnosed as CMT type 1. The audiogram showed bilateral sensorineural hearing impairment. MRI revealed spinal disc bulges. The treatment plan includes Achilles tendon lengthening surgery and physical therapy. Clinical discussion CMT patients need to receive supportive treatment including physical therapy, hearing aids, and glasses, to help improve their quality of life. Conclusion CMT disease is a genetic disorder that causes difficulties in movement, coordination, and daily activities due to muscle weakness and sensory impairments. In a few cases, patients have been documented to have bilateral hearing impairment as their first symptoms. It affects individuals in Syria and around the world, and requires proper diagnosis and treatment.
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Affiliation(s)
| | - Ahmad Almohamed
- Department of Orthopedic Surgery, Damascus University, Damascus
| | - Hasan Haydar
- Department of Orthopedic Surgery, Damascus University, Damascus
| | - Yousef Alsaffaf
- Department of Orthopedic Surgery, Damascus University, Damascus
| | - Enas Sultan
- Department of Orthopedic Surgery, Damascus University, Damascus
| | | | - Waddah kazkz
- Neurology Department, Alwatani Hospital, Hama, Syria
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7
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Lee JK, Kwon H, Park JH, Jang MA, Kim YG, Kim JW, Choi BO, Jang JH. Enhancing the Reliability of PMP22 Copy Number Variation Detection with an Inherited Peripheral Neuropathy Panel. J Mol Diagn 2024; 26:304-309. [PMID: 38301867 DOI: 10.1016/j.jmoldx.2024.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 12/13/2023] [Accepted: 01/02/2024] [Indexed: 02/03/2024] Open
Abstract
The utility of the next-generation sequencing (NGS) panel could be increased in hereditary peripheral neuropathies, given that the duplication of PMP22 is a major abnormality. In the present study, the analytical performance of an algorithm for detecting PMP22 copy number variation (CNV) from the NGS panel data was evaluated. The NGS panel covers 141 genes, including PMP22 and five genes within 1.5-megabase duplicated region at 17p11.2. CNV calling was performed using a laboratory-developed algorithm. Among the 92 cases subjected to targeted NGS panel from March 2018 to January 2021, 26 were suggestive of PMP22 CNV. Multiplex ligation-dependent probe amplification analysis was performed in 58 cases, and the results were 100% concordant with the NGS data (23 duplications, 2 deletions, and 33 negatives). Analytical performance of the pipeline was further validated by another blind data set, including 14 positive and 20 negative samples. Reliable detection of PMP22 CNV was possible by analyzing not only PMP22 but also the adjacent genes within the 1.5-megabase region of 17p11.2. On the basis of the high accuracy of CNV calling for PMP22, the testing strategy for diagnosis of peripheral polyneuropathies could be simplified by reducing the need for multiplex ligation-dependent probe amplification.
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Affiliation(s)
- Jong Kwon Lee
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Hyemi Kwon
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jong-Ho Park
- Clinical Genomics Center, Samsung Medical Center, Seoul, Republic of Korea
| | - Mi-Ae Jang
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Young-Gon Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jong-Won Kim
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Byung-Ok Choi
- Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea; Cell and Gene Therapy Institute, Samsung Medical Center, Seoul, Republic of Korea; Samsung Advanced Institute for Health Sciences and Technology, Seoul, Republic of Korea.
| | - Ja-Hyun Jang
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
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8
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Lee JH, Park S, Perez-Flores MC, Chen Y, Kang M, Choi J, Levine L, Gratton MA, Zhao J, Notterpek L, Yamoah EN. Demyelination and Na + Channel Redistribution Underlie Auditory and Vestibular Dysfunction in PMP22-Null Mice. eNeuro 2024; 11:ENEURO.0462-23.2023. [PMID: 38378628 PMCID: PMC11059428 DOI: 10.1523/eneuro.0462-23.2023] [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: 11/05/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 02/22/2024] Open
Abstract
Altered expression of peripheral myelin protein 22 (PMP22) results in demyelinating peripheral neuropathy. PMP22 exhibits a highly restricted tissue distribution with marked expression in the myelinating Schwann cells of peripheral nerves. Auditory and vestibular Schwann cells and the afferent neurons also express PMP22, suggesting a unique role in hearing and balancing. Indeed, neuropathic patients diagnosed with PMP22-linked hereditary neuropathies often present with auditory and balance deficits, an understudied clinical complication. To investigate the mechanism by which abnormal expression of PMP22 may cause auditory and vestibular deficits, we studied gene-targeted PMP22-null mice. PMP22-null mice exhibit an unsteady gait, have difficulty maintaining balance, and live for only ∼3-5 weeks relative to unaffected littermates. Histological analysis of the inner ear revealed reduced auditory and vestibular afferent nerve myelination and profound Na+ channel redistribution without PMP22. Yet, Na+ current density was unaltered, in stark contrast to increased K+ current density. Atypical postsynaptic densities and a range of neuronal abnormalities in the organ of Corti were also identified. Analyses of auditory brainstem responses (ABRs) and vestibular sensory-evoked potential (VsEP) revealed that PMP22-null mice had auditory and vestibular hypofunction. These results demonstrate that PMP22 is required for hearing and balance, and the protein is indispensable for the formation and maintenance of myelin in the peripheral arm of the eighth nerve. Our findings indicate that myelin abnormalities and altered signal propagation in the peripheral arm of the auditory nerve are likely causes of auditory deficits in patients with PMP22-linked neuropathies.
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Affiliation(s)
- Jeong Han Lee
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, Reno 89557, Nevada
| | - Seojin Park
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, Reno 89557, Nevada
- Prestige BioPharma, Busan 67264, South Korea
| | - Maria C Perez-Flores
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, Reno 89557, Nevada
| | - Yingying Chen
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, Reno 89557, Nevada
| | - Mincheol Kang
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, Reno 89557, Nevada
- Prestige BioPharma, Busan 67264, South Korea
| | - Jinsil Choi
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, Reno 89557, Nevada
| | - Lauren Levine
- Program in Audiology and Communication Sciences, Washington University, St. Louis 63110, Missouri
| | | | - Jie Zhao
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, Reno 89557, Nevada
| | - Lucia Notterpek
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, Reno 89557, Nevada
| | - Ebenezer N Yamoah
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, Reno 89557, Nevada
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9
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Kim HR, Lee HJ, Jeon Y, Jang SY, Shin YK, Yun JH, Park HJ, Koh H, Lee KE, Shin JE, Park HT. Targeting SARM1 improves autophagic stress-induced axonal neuropathy. Autophagy 2024; 20:29-44. [PMID: 37561040 PMCID: PMC10761069 DOI: 10.1080/15548627.2023.2244861] [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: 12/14/2022] [Revised: 07/23/2023] [Accepted: 07/31/2023] [Indexed: 08/11/2023] Open
Abstract
ABBREVIATIONS AAV: adeno-associated virus; ATF3: activating transcription factor 3; ATG7: autophagy related 7; AVIL: advillin; cADPR: cyclic ADP ribose; CALC: calcitonin/calcitonin-related polypeptide; CMT: Charcot-Marie-Tooth disease; cKO: conditional knockout; DEG: differentially expressed gene; DRG: dorsal root ganglion; FE-SEM: field emission scanning electron microscopy; IF: immunofluorescence; NCV: nerve conduction velocity; PVALB: parvalbumin; RAG: regeneration-associated gene; ROS: reactive oxygen species; SARM1: sterile alpha and HEAT/Armadillo motif containing 1; SYN1: synapsin I.
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Affiliation(s)
- Hye Ran Kim
- Peripheral Neuropathy Research Center (PNRC), Department of Molecular Neuroscience and Translational Biomedical Sciences, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Hye Jin Lee
- Peripheral Neuropathy Research Center (PNRC), Department of Molecular Neuroscience and Translational Biomedical Sciences, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Yewon Jeon
- Department of Life Sciences, Division of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - So Young Jang
- Peripheral Neuropathy Research Center (PNRC), Department of Molecular Neuroscience and Translational Biomedical Sciences, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Yoon Kyoung Shin
- Peripheral Neuropathy Research Center (PNRC), Department of Molecular Neuroscience and Translational Biomedical Sciences, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Jean Ho Yun
- Department of Biochemistry, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Hye Ji Park
- Neuroscience Translational Research Solution Center, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Hyongjong Koh
- Neuroscience Translational Research Solution Center, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Kyung Eun Lee
- Advanced Analysis Center, Korea Institute of Science and Technology (KIST), Seoul, Republic of Korea
| | - Jung Eun Shin
- Peripheral Neuropathy Research Center (PNRC), Department of Molecular Neuroscience and Translational Biomedical Sciences, Dong-A University College of Medicine, Busan, Republic of Korea
| | - Hwan Tae Park
- Peripheral Neuropathy Research Center (PNRC), Department of Molecular Neuroscience and Translational Biomedical Sciences, Dong-A University College of Medicine, Busan, Republic of Korea
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10
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Goh CJ, Kwon HJ, Kim Y, Jung S, Park J, Lee IK, Park BR, Kim MJ, Kim MJ, Lee MS. Improving CNV Detection Performance in Microarray Data Using a Machine Learning-Based Approach. Diagnostics (Basel) 2023; 14:84. [PMID: 38201393 PMCID: PMC10871075 DOI: 10.3390/diagnostics14010084] [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: 10/17/2023] [Revised: 12/26/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Copy number variation (CNV) is a primary source of structural variation in the human genome, leading to several disorders. Therefore, analyzing neonatal CNVs is crucial for managing CNV-related chromosomal disabilities. However, genomic waves can hinder accurate CNV analysis. To mitigate the influences of the waves, we adopted a machine learning approach and developed a new method that uses a modified log R ratio instead of the commonly used log R ratio. Validation results using samples with known CNVs demonstrated the superior performance of our method. We analyzed a total of 16,046 Korean newborn samples using the new method and identified CNVs related to 39 genetic disorders were identified in 342 cases. The most frequently detected CNV-related disorder was Joubert syndrome 4. The accuracy of our method was further confirmed by analyzing a subset of the detected results using NGS and comparing them with our results. The utilization of a genome-wide single nucleotide polymorphism array with wave offset was shown to be a powerful method for identifying CNVs in neonatal cases. The accurate screening and the ability to identify various disease susceptibilities offered by our new method could facilitate the identification of CNV-associated chromosomal disease etiologies.
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Affiliation(s)
- Chul Jun Goh
- Eone-Diagnomics Genome Center, Inc., 143, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea; (C.J.G.); (H.-J.K.); (Y.K.); (S.J.); (J.P.); (I.K.L.); (B.-R.P.); (M.-J.K.)
| | - Hyuk-Jung Kwon
- Eone-Diagnomics Genome Center, Inc., 143, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea; (C.J.G.); (H.-J.K.); (Y.K.); (S.J.); (J.P.); (I.K.L.); (B.-R.P.); (M.-J.K.)
- Department of Computer Science and Engineering, Incheon National University (INU), Incheon 22012, Republic of Korea
| | - Yoonhee Kim
- Eone-Diagnomics Genome Center, Inc., 143, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea; (C.J.G.); (H.-J.K.); (Y.K.); (S.J.); (J.P.); (I.K.L.); (B.-R.P.); (M.-J.K.)
| | - Seunghee Jung
- Eone-Diagnomics Genome Center, Inc., 143, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea; (C.J.G.); (H.-J.K.); (Y.K.); (S.J.); (J.P.); (I.K.L.); (B.-R.P.); (M.-J.K.)
| | - Jiwoo Park
- Eone-Diagnomics Genome Center, Inc., 143, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea; (C.J.G.); (H.-J.K.); (Y.K.); (S.J.); (J.P.); (I.K.L.); (B.-R.P.); (M.-J.K.)
| | - Isaac Kise Lee
- Eone-Diagnomics Genome Center, Inc., 143, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea; (C.J.G.); (H.-J.K.); (Y.K.); (S.J.); (J.P.); (I.K.L.); (B.-R.P.); (M.-J.K.)
- Department of Computer Science and Engineering, Incheon National University (INU), Incheon 22012, Republic of Korea
- NGENI Foundation, San Diego, CA 92127, USA
| | - Bo-Ram Park
- Eone-Diagnomics Genome Center, Inc., 143, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea; (C.J.G.); (H.-J.K.); (Y.K.); (S.J.); (J.P.); (I.K.L.); (B.-R.P.); (M.-J.K.)
| | - Myeong-Ji Kim
- Eone-Diagnomics Genome Center, Inc., 143, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea; (C.J.G.); (H.-J.K.); (Y.K.); (S.J.); (J.P.); (I.K.L.); (B.-R.P.); (M.-J.K.)
| | - Min-Jeong Kim
- Diagnomics, Inc., 5795 Kearny Villa Rd., San Diego, CA 92123, USA;
| | - Min-Seob Lee
- Eone-Diagnomics Genome Center, Inc., 143, Gaetbeol-ro, Yeonsu-gu, Incheon 21999, Republic of Korea; (C.J.G.); (H.-J.K.); (Y.K.); (S.J.); (J.P.); (I.K.L.); (B.-R.P.); (M.-J.K.)
- Diagnomics, Inc., 5795 Kearny Villa Rd., San Diego, CA 92123, USA;
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11
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Labbadia J. Potential roles for mitochondria-to-HSF1 signaling in health and disease. Front Mol Biosci 2023; 10:1332658. [PMID: 38164224 PMCID: PMC10757924 DOI: 10.3389/fmolb.2023.1332658] [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: 11/03/2023] [Accepted: 12/07/2023] [Indexed: 01/03/2024] Open
Abstract
The ability to respond rapidly and efficiently to protein misfolding is crucial for development, reproduction and long-term health. Cells respond to imbalances in cytosolic/nuclear protein homeostasis through the Heat Shock Response, a tightly regulated transcriptional program that enhances protein homeostasis capacity by increasing levels of protein quality control factors. The Heat Shock Response is driven by Heat Shock Factor 1, which is rapidly activated by the appearance of misfolded proteins and drives the expression of genes encoding molecular chaperones and protein degradation factors, thereby restoring proteome integrity. HSF1 is critical for organismal health, and this has largely been attributed to the preservation of cytosolic and nuclear protein homeostasis. However, evidence is now emerging that HSF1 is also a key mediator of mitochondrial function, raising the possibility that many of the health benefits conferred by HSF1 may be due to the maintenance of mitochondrial homeostasis. In this review, I will discuss our current understanding of the interplay between HSF1 and mitochondria and consider how mitochondria-to-HSF1 signaling may influence health and disease susceptibility.
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Affiliation(s)
- Johnathan Labbadia
- Department of Genetics, Evolution and Environment, Division of Biosciences, Institute of Healthy Ageing, University College London, London, United Kingdom
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12
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Ghanbari A, Ghasemi S, Zarbakhsh S. Exercise induced myelin protein zero improvement in neuropathic pain rats. Somatosens Mot Res 2023; 40:141-146. [PMID: 36630644 DOI: 10.1080/08990220.2022.2158800] [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: 06/01/2022] [Accepted: 12/08/2022] [Indexed: 01/12/2023]
Abstract
PURPOSE Aerobic exercise including swimming plays a suitable role in improving somatosensory injuries. Neuropathic pain is a debilitating condition that occurs following injury or diseases of somatosensory system. In the present study, we tried to investigate the effect of exercise on myelin protein zero of sciatic nerve injured rats. MATERIALS AND METHODS Forty male rats (180-220 g) were divided into five groups (intact, sham, sham + exercise, neuropathy, and neuropathy + exercise). Right Sciatic nerve of anesthetized rats was exposed and loosely ligated (four ligations with 1 mm apart) using catgut chromic sutures to induce neuropathy. After 3 days of recovery, swimming exercise began (20 min/day/5 days a week/4 weeks). Mechanical allodynia and thermal hyperalgesia were detected using Von Frey filaments and plantar test, respectively. Sciatic nerve at the place of injury was dissected out to measure the myelin protein zero by western blot analysis. In the intact and sham groups, sciatic nerve removed at the place similar to injured group. RESULTS We found that neuropathy significantly (p < 0.05) reduced paw withdrawal mechanical and thermal thresholds and swimming exercise significantly (p < 0.05) increased paw withdrawal mechanical and thermal thresholds compared to the neuropathy group. Moreover, we found that MPZ level significantly (p < 0.01) decreased in neuropathy group against that in sham group, and exercise prominently (p < 0.05) reversed MPZ level towards control level. CONCLUSIONS Swimming exercise improves myelin protein zero level in neuropathic rats along with attenuating neuropathic pain. This is a promising approach in improving neuropathological disorders including Charcot-Marie-Tooth and Dejerine-Sottas disease.
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Affiliation(s)
- Ali Ghanbari
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran
| | - Sahar Ghasemi
- Student Research Committee, Semnan University of Medical Sciences, Semnan, Iran
| | - Sam Zarbakhsh
- Nervous System Stem Cell Research Center, Semnan University of Medical Sciences, Semnan, Iran
- Department of anatomical sciences, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran
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13
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Sotiriadou M, Manani M, Kouzoukidou E, Oikonomidou E. Investigation for statin intolerance reveals possible Charcot-Marie-Tooth disease in a coronary patient: A case report. Hippokratia 2023; 27:155-157. [PMID: 39372326 PMCID: PMC11451505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/08/2024]
Abstract
Background Statin regimens are essential for managing lipids and preventing cardiovascular diseases, both in primary and secondary prevention, alongside lifestyle changes. There are, however, some side-effects associated with statin intake, such as an elevation of (CK) and myopathy. Case description This case describes a coronary patient with high low-density lipoprotein cholesterol (LDL-C) who was undertreated due to elevated creatine kinase (CK) levels and myopathy initially linked to statin use. A proprotein convertase subtilisin/kexin type 9 inhibitor (PCSK9i) replaced statin therapy; however, the existence of persisting/recurrent symptoms or CK elevation posed the need for further investigation. A neurological examination, an electromyography (EMG), and a nerve conduction study (NCV) revealed an underlying sensorimotor polyneuropathy, probably Charcot-Marie-Tooth disease. Conclusions Persistent muscle symptoms in patients receiving statins should not be always attributed solely to statin intake. Further neurological evaluation could reveal underlying hereditary sensorimotor polyneuropathies. PCSK9i could serve as the therapy of choice in such cases, as additional drug-induced myopathy could pose severe problems for those patients. HIPPOKRATIA 2023, 27 (4):155-157.
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Affiliation(s)
| | - M Manani
- Health Center of Evosmos, Thessaloniki, Greece
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Bunik V. The Therapeutic Potential of Vitamins B1, B3 and B6 in Charcot-Marie-Tooth Disease with the Compromised Status of Vitamin-Dependent Processes. BIOLOGY 2023; 12:897. [PMID: 37508330 PMCID: PMC10376249 DOI: 10.3390/biology12070897] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 06/11/2023] [Accepted: 06/19/2023] [Indexed: 07/30/2023]
Abstract
Understanding the molecular mechanisms of neurological disorders is necessary for the development of personalized medicine. When the diagnosis considers not only the disease symptoms, but also their molecular basis, treatments tailored to individual patients may be suggested. Vitamin-responsive neurological disorders are induced by deficiencies in vitamin-dependent processes. These deficiencies may occur due to genetic impairments of proteins whose functions are involved with the vitamins. This review considers the enzymes encoded by the DHTKD1, PDK3 and PDXK genes, whose mutations are observed in patients with Charcot-Marie-Tooth (CMT) disease. The enzymes bind or produce the coenzyme forms of vitamins B1 (thiamine diphosphate, ThDP) and B6 (pyridoxal-5'-phosphate, PLP). Alleviation of such disorders through administration of the lacking vitamin or its derivative calls for a better introduction of mechanistic knowledge to medical diagnostics and therapies. Recent data on lower levels of the vitamin B3 derivative, NAD+, in the blood of patients with CMT disease vs. control subjects are also considered in view of the NAD-dependent mechanisms of pathological axonal degeneration, suggesting the therapeutic potential of vitamin B3 in these patients. Thus, improved diagnostics of the underlying causes of CMT disease may allow patients with vitamin-responsive disease forms to benefit from the administration of the vitamins B1, B3, B6, their natural derivatives, or their pharmacological forms.
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Affiliation(s)
- Victoria Bunik
- Belozersky Institute of Physicochemical Biology, Department of Biokinetics, Lomonosov Moscow State University, 119234 Moscow, Russia
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, 119234 Moscow, Russia
- Department of Biochemistry, Sechenov University, 119048 Moscow, Russia
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15
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Boyer O, Mollet G, Dorval G. [Neurological disorders and hereditary podocytopathies: Some fascinating pathophysiological overlaps]. Med Sci (Paris) 2023; 39:246-252. [PMID: 36943121 DOI: 10.1051/medsci/2023029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023] Open
Abstract
Genetic studies of hereditary steroid resistant nephrotic syndrome (SRNS) have identified more than 60 genes involved in the development of single-gene, isolated or syndromic forms of hereditary podocytoapthies. Sometimes, syndromic SRNS is associated with neurological disorders. Over the past decades, various studies have established links between the podocyte, an epithelial glomerular cell involved in the renal filtration barrier, and neuronal cells, both morphologically (slit diaphragm and synapse) and functionally (signaling platforms). Variants of genes encoding proteins expressed in different compartments of the podocyte and neurons are responsible for phenotypes associating renal lesions with proteinuria to central and/or peripheral neurological disorders. In this review, we aim to focus on genetic syndromes associating proteinuria and neurological disease and to present the latest advances in the description of these neuro-renal disorders.
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Affiliation(s)
- Olivia Boyer
- Service de néphrologie pédiatrique, AP-HP, Centre de référence de maladies rénales rares de l'enfant et de l'adulte (MARHEA), hôpital Necker - Enfants Malades, Paris, France - Université Paris Cité, institut Imagine, laboratoire des maladies rénales héréditaires, Inserm UMR1163, Paris, France
| | - Géraldine Mollet
- Université Paris Cité, institut Imagine, laboratoire des maladies rénales héréditaires, Inserm UMR1163, Paris, France
| | - Guillaume Dorval
- Université Paris Cité, institut Imagine, laboratoire des maladies rénales héréditaires, Inserm UMR1163, Paris, France - Service de génétique moléculaire, AP-HP, hôpital Necker-Enfants Malades, Paris, France
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16
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Phan HTL, Kim K, Lee H, Seong JK. Progress in and Prospects of Genome Editing Tools for Human Disease Model Development and Therapeutic Applications. Genes (Basel) 2023; 14:483. [PMID: 36833410 PMCID: PMC9957140 DOI: 10.3390/genes14020483] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 02/17/2023] Open
Abstract
Programmable nucleases, such as zinc finger nucleases (ZFNs), transcription activator-like effector nucleases (TALENs), and clustered regularly interspaced short palindromic repeats (CRISPR)/Cas, are widely accepted because of their diversity and enormous potential for targeted genomic modifications in eukaryotes and other animals. Moreover, rapid advances in genome editing tools have accelerated the ability to produce various genetically modified animal models for studying human diseases. Given the advances in gene editing tools, these animal models are gradually evolving toward mimicking human diseases through the introduction of human pathogenic mutations in their genome rather than the conventional gene knockout. In the present review, we summarize the current progress in and discuss the prospects for developing mouse models of human diseases and their therapeutic applications based on advances in the study of programmable nucleases.
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Affiliation(s)
- Hong Thi Lam Phan
- Department of Physiology, Korea University College of Medicine, Seoul 02841, Republic of Korea
| | - Kyoungmi Kim
- Department of Physiology, Korea University College of Medicine, Seoul 02841, Republic of Korea
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul 02841, Republic of Korea
| | - Ho Lee
- Graduate School of Cancer Science and Policy, National Cancer Center, Goyang 10408, Republic of Korea
| | - Je Kyung Seong
- Korea Mouse Phenotyping Center, Seoul National University, Seoul 08826, Republic of Korea
- Laboratory of Developmental Biology and Genomics, BK21 PLUS Program for Creative Veterinary Science Research, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul 08826, Republic of Korea
- Interdisciplinary Program for Bioinformatics, Program for Cancer Biology, BIO-MAX/N-Bio Institute, Seoul National University, Seoul 08826, Republic of Korea
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Newman L, Fornusek C, Hackett D. An exploratory study of exercise behaviours and barriers to participation in people with Charcot-Marie-Tooth disease: a focus on resistance training. J Exerc Rehabil 2023; 19:35-44. [PMID: 36910678 PMCID: PMC9993004 DOI: 10.12965/jer.2346020.010] [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: 01/17/2023] [Accepted: 01/31/2023] [Indexed: 02/25/2023] Open
Abstract
The aim of this study was to explore and describe the exercise behaviours and barriers in people with Charcot-Marie-Tooth disease (CMT), with a particular focus on resistance training (RT). Ninety-four Australian adults with a diagnosis of CMT completed an online survey. Fifty-seven percent of respondents reported performing some form of RT each week. Those performing RT engaged in more aerobic activity (P≤0.01) and were involved in longer periods of structured exercise (P<0.01) compared to those not performing RT. The RT group was more likely to perceive their exercise levels as acceptable (P<0.01), that following a program was important (P=0.02), and that exercise is beneficial (P=0.04). The RT group were more likely to have been advised to exercise (P=0.02). Common barriers to exercise were fatigue (64.9%), pain (57.4%), motivation (51.1%), and time (46.8%). RT status did not influence the type of barriers experienced. Weekly RT time was positively associated with exercise satisfaction (r=0.43, P<0.01) and walking distance prior to resting (r=0.29, P=0.04). The findings suggest that positive exercise experiences, advice, assistance from a trainer, and potentially greater resources may influence participation in RT for people with CMT.
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Affiliation(s)
- Laura Newman
- Discipline of Exercise and Sport Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia
| | - Che Fornusek
- Discipline of Exercise and Sport Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia
| | - Daniel Hackett
- Discipline of Exercise and Sport Science, Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia
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Playing Disability Rugby League with Charcot-Marie-Tooth Disease: A Case Study. Sports (Basel) 2023; 11:sports11020021. [PMID: 36828306 PMCID: PMC9964179 DOI: 10.3390/sports11020021] [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: 11/27/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023] Open
Abstract
Charcot-Marie-Tooth (CMT) disease is a common inherited neurological disorder that causes damage to peripheral nerves. Reports of CMT patients participating in team-based sports such as disability rugby league are scarce. The objective of this case report was to evaluate the benefits of participation in disability rugby league in a 50-year-old male with CMT. Leg muscle mass and strength was worse for the case subject compared to two age-matched CMT participants with an exercise history; however, evidence of greater function in the case subject was observed through better 6-min walk test performance. Performance in a series of sport specific tests was noticeably worse for the case subject compared to a fellow rugby league player (age matched) with cerebral palsy. Inferior in-game performance was observed for the case subject compared to his fellow rugby league player in terms of distance covered, top running speed, and intensity. However, the case subject may have assumed a different role when playing as evident by the different behaviours he displayed during the games (i.e., less player contacts, tackles, or touches, but more passes of the ball). This case study provides information concerning disability rugby league as an adjunctive mode of treatment for CMT populations.
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Towards a Cure for HARS Disease. Genes (Basel) 2023; 14:genes14020254. [PMID: 36833180 PMCID: PMC9956352 DOI: 10.3390/genes14020254] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/20/2023] Open
Abstract
Histidyl-tRNA synthetase (HARS) ligates histidine to its cognate transfer RNA (tRNAHis). Mutations in HARS cause the human genetic disorders Usher syndrome type 3B (USH3B) and Charcot-Marie-Tooth syndrome type 2W (CMT2W). Treatment for these diseases remains symptomatic, and no disease specific treatments are currently available. Mutations in HARS can lead to destabilization of the enzyme, reduced aminoacylation, and decreased histidine incorporation into the proteome. Other mutations lead to a toxic gain-of-function and mistranslation of non-cognate amino acids in response to histidine codons, which can be rescued by histidine supplementation in vitro. We discuss recent advances in characterizing HARS mutations and potential applications of amino acid and tRNA therapy for future gene and allele specific therapy.
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20
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Beloribi-Djefaflia S, Attarian S. Treatment of Charcot-Marie-Tooth neuropathies. Rev Neurol (Paris) 2023; 179:35-48. [PMID: 36588067 DOI: 10.1016/j.neurol.2022.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 11/18/2022] [Accepted: 11/24/2022] [Indexed: 12/31/2022]
Abstract
Charcot-Marie-Tooth (CMT) is a heterogeneous group of inherited neuropathies that affect the peripheral nerves and slowly cause progressive disability. Currently, there is no effective therapy. Patients' management is based on rehabilitation and occupational therapy, fatigue, and pain treatment with regular follow-up according to the severity of the disease. In the last three decades, much progress has been made to identify mutations involved in the different types of CMT, decipher the pathophysiology of the disease, and identify key genes and pathways that could be targeted to propose new therapeutic strategies. Genetic therapy is one of the fields of interest to silence genes such as PMP22 in CMT1A or to express GJB1 in CMT1X. Among the most promising molecules, inhibitors of the NRG-1 axis and modulators of UPR or the HDACs enzyme family could be used in different types of CMT.
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Affiliation(s)
- S Beloribi-Djefaflia
- Reference center for neuromuscular disorders and ALS, AP-HM, CHU La Timone, Marseille, France
| | - S Attarian
- Reference center for neuromuscular disorders and ALS, AP-HM, CHU La Timone, Marseille, France; FILNEMUS, European Reference Network for Rare Diseases (ERN), Marseille, France; Medical Genetics, Aix Marseille Université-Inserm UMR_1251, 13005 Marseille, France.
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Muacevic A, Adler JR, Rodrigues AC, Nunes R, Fernandes FG, Pipa T, Marques A, Moreira C. The Impact of a Late Diagnosis: A Case of Charcot-Marie-Tooth Type 1. Cureus 2023; 15:e33727. [PMID: 36788827 PMCID: PMC9922377 DOI: 10.7759/cureus.33727] [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] [Accepted: 01/12/2023] [Indexed: 01/15/2023] Open
Abstract
Charcot-Marie-Tooth (CMT) is a hereditary motor and sensory neuropathy. The disease consists of a spectrum of inherited disorders caused by pathogenic variants in genes, which lead to multiple different clinical phenotypes. It is one of the most common inherited neuromuscular disorders. This disease most commonly presents with symptoms of distal weakness and muscular atrophy, which then lead to foot drop and pés cavus. In this article, we describe the case of a patient who developed muscle atrophy and distal weakness over the course of his 52 years of life, leading to gait impairment and foot deformities. Subsequent investigation led to the acknowledgment of chronic axonal sensorimotor polyneuropathy and genetic identification of the disease's genotype, CMT type 1. .
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22
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Levy G, Levin B, Engelhardt E. Echoes of William Gowers's concept of abiotrophy. JOURNAL OF THE HISTORY OF THE NEUROSCIENCES 2022; 31:425-449. [PMID: 34905460 DOI: 10.1080/0964704x.2021.1989649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Among William Gowers's many contributions to neurology, the concept of abiotrophy ("an essential failure of vitality") has been relatively overlooked. In this article, we review the echoes of Gowers's concept in neurology, ophthalmology, and aging research. We also argue that abiotrophy is broader than both heredodegeneration and neurodegeneration. Unlike the common view that it simply means premature aging, abiotrophy currently can be understood as a progressive degenerative process of a mature specialized tissue, which is nonsynchronous with normal aging and may affect organs or systems early in life, resulting from the age-dependent effects of genetic mutations or variants, even if environmental factors may also causally contribute to the process. Although the term has largely fallen out of use, there are likely to be everlasting echoes of Gowers's concept, through which he is to be considered a source of the modern thinking about the etiology and nosology of neurological diseases.
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Affiliation(s)
| | - Bruce Levin
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, New York, USA
| | - Eliasz Engelhardt
- Instituto de Neurologia Deolindo Couto and Instituto de Psiquiatria, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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23
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Setlere S, Jurcenko M, Gailite L, Rots D, Kenina V. Alanyl-tRNA Synthetase 1 Gene Variants in Hereditary Neuropathy. Neurol Genet 2022; 8:e200019. [PMID: 36092982 PMCID: PMC9450682 DOI: 10.1212/nxg.0000000000200019] [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: 12/22/2022] [Accepted: 07/01/2022] [Indexed: 11/15/2022]
Abstract
Background and ObjectivesOur objective was to report 2 novel variants and to reclassify previously reported alanyl-tRNA synthetase 1 (AARS1) variants associated with hereditary neuropathy and to summarize the clinical features of a previously published cohort of patients.MethodsWe performed detailed neurologic and electrophysiologic assessments and segregation analysis of 2 unrelated families with Charcot-Marie-Tooth (CMT) disease with novel variants in the AARS1 gene. Via literature search, we found studies that included neuropathy cases with AARS1 variants; we then reviewed and reclassified these variants.ResultsWe identified 2 CMT families harboring previously unreported likely pathogenic AARS1 variants: c.1823C>A p.(Thr608Lys) and c.1815C>G p.(His605Gln). In addition, we reinterpreted a total of 35 different AARS1 variants reported in cases with neuropathy from the literature: 9 variants fulfilled the current criteria for being (likely) pathogenic. We compiled and summarized standardized clinical and genotypic information for 90 affected individuals from 32 families with (likely) pathogenic AARS1 variants. Most experienced motor weakness and sensory loss in the lower limbs.DiscussionIn total, 11 AARS1 variants can currently be classified as pathogenic or likely pathogenic and are associated with sensorimotor axonal or intermediate, slowly progressive polyneuropathy with common asymmetry and variable age of symptom onset with no apparent involvement of other organ systems.
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Chu F, Xu J, Wang Y, Li Y, Wang Y, Liu Z, Li C. Novel mutations in GJB1 trigger intracellular aggregation and stress granule formation in X-linked Charcot-Marie-Tooth Disease. Front Neurosci 2022; 16:972288. [PMID: 36225735 PMCID: PMC9548587 DOI: 10.3389/fnins.2022.972288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 09/05/2022] [Indexed: 11/16/2022] Open
Abstract
X-linked Charcot-Marie-Tooth Disease type 1(CMT1X) is the second most common form of inherited peripheral neuropathy that is caused by mutations in the gap junction beta-1 (GJB1) gene. Using targeted exome-sequencing, we investigated four CMT families from central-southern China and identified two novel missense variants (p.F31S and p.W44G) and two previously reported variants (p.R220Pfs*23 and p.R164Q) of GJB1. All four probands presented typical early-onset peripheral neuropathy, of which the R220Pfs*23 carrier also had neurologic manifestations in the central nervous system. We then constructed GJB1 expression vectors and performed cell biological analysis in vitro. Expression of FLAG-tagged GJB1 at various time points after transfection revealed evident protein aggregation with both wild-type and mutant forms, indicated with immunostaining and immunoblotting. Detergent-based sequential fractionation confirmed that all mutants were higher expressed and more prone to aggregate than the wild-type, whereas the R220Pfs*23 mutant showed the greatest amount of SDS-soluble multimers and monomers among groups. Moreover, intracellular aggregation probably occurs in the endoplasmic reticulum compartment rather than the Golgi apparatus. Gap junction plaques were present in all groups and were only compromised in frameshift mutant. Further evidence reveals significant intracellular stress granule formation induced by mutated GJB1 and impaired cell viability indicative of cytotoxicity of self-aggregates. Together, our findings demonstrate novel GJB1 variants-induced cell stress and dysfunction and provide insights into understanding the pathomechanisms of GJB1-CMTX1 and other related disorders.
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Affiliation(s)
- Fan Chu
- Department of Medical Genetics, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiaming Xu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yong Wang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yingjie Li
- Department of Medical Genetics, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yaling Wang
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhijun Liu
- Department of Neurology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chuanzhou Li
- Department of Medical Genetics, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Nguyen‐Le T, Do MD, Le LHG, Nhat QNN, Hoang NTT, Van Le T, Mai TP. Genotype-phenotype characteristics of Vietnamese patients diagnosed with Charcot-Marie-Tooth disease. Brain Behav 2022; 12:e2744. [PMID: 35938991 PMCID: PMC9480926 DOI: 10.1002/brb3.2744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/28/2022] [Accepted: 07/26/2022] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Charcot-Marie-Tooth (CMT) disease is one of the most common hereditary neuropathies. Identifying causative mutations in CMT is essential as it provides important information for genetic diagnosis and counseling. However, genetic information of Vietnamese patients diagnosed with CMT is currently not available. METHODS In this study, we described the clinical profile and determined the mutation spectrum of CMT in a cohort of Vietnamese patients with CMT by using a combination of multiplex ligation-dependent probe amplification and next-generation sequencing targeting 11 genes PMP22, MPZ, EGR2, NEFL, MFN2, GDAP1, GARS, MTMR2, GJB1, RAB7A, LITAF. RESULTS In 31 CMT cases, the mutation detection rate was 42% and the most common genetic aberration was PMP22 duplication. The pedigree analysis showed two de novo mutations c.64C > A (p.P22T) and c.281delG (p.G94Afs*17) in the NEFL and PMP22 genes, respectively. CONCLUSION The results of this study once again emphasize the important role of molecular diagnosis and provide preliminary genetic data on Vietnamese patients with CMT.
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Affiliation(s)
- Trung‐Hieu Nguyen‐Le
- Faculty of MedicineUniversity of Medicine and Pharmacy at Ho Chi Minh CityVietnam
| | - Minh Duc Do
- Center for Molecular BiomedicineUniversity of Medicine and Pharmacy at Ho Chi Minh CityVietnam
| | - Linh Hoang Gia Le
- Center for Molecular BiomedicineUniversity of Medicine and Pharmacy at Ho Chi Minh CityVietnam
| | - Quynh Nhu Nguyen Nhat
- Center for Molecular BiomedicineUniversity of Medicine and Pharmacy at Ho Chi Minh CityVietnam
| | | | - Tuan Van Le
- Faculty of MedicineUniversity of Medicine and Pharmacy at Ho Chi Minh CityVietnam
| | - Thao Phuong Mai
- Faculty of MedicineUniversity of Medicine and Pharmacy at Ho Chi Minh CityVietnam
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Abdelnaby R, Elgenidy A, Sonbol YT, Dardeer KT, Ebrahim MA, Maallem I, Youssef MW, Moawad MHED, Hassan YG, Rabie SA, Mohammed MK, Abdelrhem HAH, Mohamed KA, Walter U. Nerve Sonography in Charcot-Marie-Tooth Disease: A Systematic Review and Meta-analysis of 6061 Measured Nerves. ULTRASOUND IN MEDICINE & BIOLOGY 2022; 48:1397-1409. [PMID: 35667977 DOI: 10.1016/j.ultrasmedbio.2022.04.220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 04/15/2022] [Accepted: 04/29/2022] [Indexed: 06/15/2023]
Abstract
Because of the insidious character and variations in presenting symptoms, Charcot-Marie-Tooth (CMT) disease is challenging to diagnose in children. Diagnosis is based on clinical and nerve conduction studies, as well as genetic examination. Therefore, competent nerve imaging techniques and non-invasive alternatives to nerve conduction studies are a necessity, especially in children. We performed a systematic review and meta-analysis to evaluate the current evidence and effectiveness of ultrasound in investigating nerve cross-sectional area (CSA) in those with CMT compared with healthy controls and to pool the CSA measurements. We included studies published in international peer-reviewed journals that measured nerve CSA by ultrasound in patients with CMT. We implemented double-arm meta-analyses to compare the mean CSA of nerves between patients with CMT and healthy controls by calculating the pooled mean difference in CSA. Moreover, we performed subgroup analyses by stratifying the studies according to the site of CSA measurement and examined the difference in nerve CSA between CMT1A and other CMT types. The included studies provide measurements of 12 nerve roots and nerves (vagus, C3, C4, C5, C6, greater auricular, phrenic, median, ulnar, fibular, tibial and sural nerves) in 628 patients with CMT and 586 healthy controls with a total of 6061 measured nerves. Meta-analyses of sonographic nerve CSA are provided to express nerve ultrasonography in the diagnosis of CMT patient.
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Affiliation(s)
- Ramy Abdelnaby
- Department of Neurology, RWTH Aachen University, Aachen, Germany.
| | | | | | | | | | - Imene Maallem
- Faculty of Medicine, University Badji Mokhtar Annaba, Annaba, Algeria
| | | | | | | | | | | | | | | | - Uwe Walter
- Department of Neurology, Rostock University, Rostock, Germany
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Yerabandi N, Kouznetsova VL, Kesari S, Tsigelny IF. The role of BAG3 in dilated cardiomyopathy and its association with Charcot-Marie-Tooth disease type 2. ACTA MYOLOGICA : MYOPATHIES AND CARDIOMYOPATHIES : OFFICIAL JOURNAL OF THE MEDITERRANEAN SOCIETY OF MYOLOGY 2022; 41:59-75. [PMID: 35832504 PMCID: PMC9237749 DOI: 10.36185/2532-1900-071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 06/13/2022] [Indexed: 11/03/2022]
Abstract
Bcl2-associated athanogene 3 (BAG3) is a multifunctional cochaperone responsible for protein quality control within cells. BAG3 interacts with chaperones HSPB8 and Hsp70 to transport misfolded proteins to the Microtubule Organizing Center (MTOC) and degrade them in autophagosomes in a process known as Chaperone Assisted Selective Autophagy (CASA). Mutations in the second conserved IPV motif of BAG3 are known to cause Dilated Cardiomyopathy (DCM) by inhibiting adequate removal of non-native proteins. The proline 209 to leucine (P209L) BAG3 mutant in particular causes the aggregation of BAG3 and misfolded proteins as well as the sequestration of essential chaperones. The exact mechanisms of protein aggregation in DCM are unknown. However, the similar presence of insoluble protein aggregates in Charcot-Marie-Tooth disease type 2 (CMT2) induced by the proline 182 to leucine (P182L) HSPB1 mutant points to a possible avenue for future research: IPV motif. In this review, we summarize the molecular mechanisms of CASA and the currently known pathological effects of mutated BAG3 in DCM. Additionally, we will provide insight on the importance of the IPV motif in protein aggregation by analyzing a potential association between DCM and CMT2.
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Affiliation(s)
- Nitya Yerabandi
- REHS program, San Diego Supercomputer Center, University of California, San Diego, CA, USA
| | - Valentina L. Kouznetsova
- San Diego Supercomputer Center, University of California, San Diego, CA, USA,Biana, La Jolla, CA, USA
| | | | - Igor F. Tsigelny
- Correspondence Igor F. Tsigelny Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0505, USA. E-mail:
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Bera T, Saha PC, Chatterjee T, Kar S, Guha S. Construction of Self-Assembling Lipopeptide-Based Benign Nanovesicles to Prevent Amyloid Fibril Formation and Reduce Cytotoxicity of GxxxGxxxGxxxG Motif. Bioconjug Chem 2022; 33:1201-1209. [PMID: 35581017 DOI: 10.1021/acs.bioconjchem.2c00149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Alzheimer's disease, a progressive severe neurodegenerative disorder, has been until now incurable, in spite of serious efforts worldwide. We have designed self-assembled myristoyl-KPGPK lipopeptide-based biocompatible nanovesicles, which can inhibit amyloid fibrillation made by the transmembrane GxxxGxxxGxxxG motif of Aβ-protein and human myelin protein zero as well as reduce their neurotoxicity. Various spectroscopic and microscopic investigations illuminate that the lipopeptide-based nanovesicles dramatically inhibit random coil-to-β-sheet transformation of Aβ25-37 and human myelin protein zero protein precursor, which is the prerequisite of GxxxGxxxGxxxG motif-mediated fibril formation. Förster resonance energy transfer (FRET) assay using synthesized Cy-3 (FRET donor) and Cy-5 (FRET acceptor)-conjugated Aβ25-37 also exhibits that nanovesicles strongly inhibit the fibril formation of Aβ25-37. The mouse neuro-2a neuroblastoma cell line is used, which revealed the GxxxGxxxGxxxG-mediated cytotoxicity. However, the neurotoxicity has been diminished by co-incubating the GxxxGxxxGxxxG motif with the nanovesicles.
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Affiliation(s)
- Tapas Bera
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
| | - Pranab Chandra Saha
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
| | - Tanima Chatterjee
- Department of Biochemistry, University of Calcutta, Kolkata 700019, India
| | - Samiran Kar
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
| | - Samit Guha
- Department of Chemistry, Organic Chemistry Section, Jadavpur University, Kolkata 700032, India
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Sutinen A, Nguyen GTT, Raasakka A, Muruganandam G, Loris R, Ylikallio E, Tyynismaa H, Bartesaghi L, Ruskamo S, Kursula P. Structural insights into Charcot-Marie-Tooth disease-linked mutations in human GDAP1. FEBS Open Bio 2022; 12:1306-1324. [PMID: 35509130 PMCID: PMC9249340 DOI: 10.1002/2211-5463.13422] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/25/2022] [Accepted: 05/03/2022] [Indexed: 11/11/2022] Open
Abstract
Charcot-Marie-Tooth disease (CMT) is the most common inherited peripheral polyneuropathy in humans, and its different subtypes are linked to mutations in dozens of different genes. Mutations in ganglioside-induced differentiation-associated protein 1 (GDAP1) cause two types of CMT, demyelinating CMT4A and axonal CMT2K. The GDAP1-linked CMT genotypes are mainly missense point mutations. Despite clinical profiling and in vivo studies on the mutations, the etiology of GDAP1-linked CMT is poorly understood. Here, we describe the biochemical and structural properties of the Finnish founding CMT2K mutation H123R as well as CMT2K-linked R120W, both of which are autosomal dominant mutations. The disease variant proteins retain close to normal structure and solution behaviour, but both present a significant decrease in thermal stability. Using GDAP1 variant crystal structures, we identify a side chain interaction network between helices ⍺3, ⍺6, and ⍺7, which is affected by CMT mutations, as well as a hinge in the long helix ⍺6, which is linked to structural flexibility. Structural analysis of GDAP1 indicates that CMT may arise from disruption of specific intra- and intermolecular interaction networks, leading to alterations in GDAP1 structure and stability, and eventually, insufficient motor and sensory neuron function.
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Affiliation(s)
- Aleksi Sutinen
- Faculty of Biochemistry and Molecular Medicine & Biocenter Oulu, University of Oulu, Finland
| | - Giang Thi Tuyet Nguyen
- Faculty of Biochemistry and Molecular Medicine & Biocenter Oulu, University of Oulu, Finland
| | - Arne Raasakka
- Department of Biomedicine, University of Bergen, Norway
| | - Gopinath Muruganandam
- VIB-VUB Center for Structural Biology, Vlaams Instituut voor Biotechnologie, Brussels, Belgium.,Structural Biology Brussels, Department of Bioengineering Sciences, Vrije Universiteit Brussel, Belgium
| | - Remy Loris
- VIB-VUB Center for Structural Biology, Vlaams Instituut voor Biotechnologie, Brussels, Belgium.,Structural Biology Brussels, Department of Bioengineering Sciences, Vrije Universiteit Brussel, Belgium
| | - Emil Ylikallio
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Finland.,Clinical Neurosciences, Helsinki University Hospital, Neurology, Finland
| | - Henna Tyynismaa
- Stem Cells and Metabolism Research Program, Faculty of Medicine, University of Helsinki, Finland
| | | | - Salla Ruskamo
- Faculty of Biochemistry and Molecular Medicine & Biocenter Oulu, University of Oulu, Finland
| | - Petri Kursula
- Faculty of Biochemistry and Molecular Medicine & Biocenter Oulu, University of Oulu, Finland.,Department of Biomedicine, University of Bergen, Norway
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Jamiri Z, Khosravi R, Heidari MM, Kiani E, Gharechahi J. A nonsense mutation in MME gene associates with autosomal recessive late-onset Charcot-Marie-Tooth disease. Mol Genet Genomic Med 2022; 10:e1913. [PMID: 35212467 PMCID: PMC9034668 DOI: 10.1002/mgg3.1913] [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: 12/01/2021] [Revised: 02/08/2022] [Accepted: 02/14/2022] [Indexed: 01/02/2023] Open
Abstract
Background The genetic cause for the majority of patients with late‐onset axonal form of neuropathies have remained unknown. In this study we aimed to identify the causal mutation in a family with multiple affected individuals manifesting a range of phenotypic features consistent with late‐onset sensorimotor axonal polyneuropathy. Methods Whole exome sequencing (WES) followed by targeted variant screening and prioritization was performed to identify the candidate mutation. The co‐segregation of the mutation with the phenotype was confirmed by Sanger sequencing. Results We identified a nonsense mutation (c.1564C>T; p.Q522*) in membrane metalloendopeptidase (MME) gene as the cause of the disease condition. The mutation has a combined annotation‐ dependent depletion (CADD) score 45 and predicted to be deleterious based on various algorithms. The mutation was inherited in an autosomal recessive mode and further confirmed to co‐segregate with the disease phenotype in the family and showed to has the required criteria including rarity and deleteriousness to be considered as pathogenic. Conclusion The MME gene encodes for the membrane bound endopeptidase neprilysin (NEP) which is involved in processing of various peptide substrates. The identified mutation causes a complete loss of carboxy‐terminal region of the NEP protein which contains the zinc binding site and the catalytic domain and thus considered to be a loss‐of‐function mutation. The loss of NEP activity is likely associated with impaired myelination and axonal injury which is hallmark of CMT diseases.
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Affiliation(s)
- Zeinab Jamiri
- Department of Biology, Faculty of Science, Yazd University, Yazd, Iran
| | - Rana Khosravi
- Department of Biology, Faculty of Science, University of Zabol, Zabol, Iran
| | | | - Ebrahim Kiani
- Human Genetics Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Javad Gharechahi
- Human Genetics Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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Guo Y, Gil Z. The Role of Extracellular Vesicles in Cancer-Nerve Crosstalk of the Peripheral Nervous System. Cells 2022; 11:cells11081294. [PMID: 35455973 PMCID: PMC9027707 DOI: 10.3390/cells11081294] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 03/30/2022] [Accepted: 04/05/2022] [Indexed: 02/06/2023] Open
Abstract
Although the pathogenic operations of cancer–nerve crosstalk (e.g., neuritogenesis, neoneurogensis, and perineural invasion—PNI) in the peripheral nervous system (PNS) during tumorigenesis, as well as the progression of all cancer types is continuing to emerge as an area of unique scientific interest and study, extensive, wide-ranging, and multidisciplinary investigations still remain fragmented and unsystematic. This is especially so in regard to the roles played by extracellular vesicles (EVs), which are lipid bilayer-enclosed nano- to microsized particles that carry multiple-function molecular cargos, facilitate intercellular communication in diverse processes. Accordingly, the biological significance of EVs has been greatly elevated in recent years, as there is strong evidence that they could contribute to important and possibly groundbreaking diagnostic and therapeutic innovations. This can be achieved and the pace of discoveries accelerated through cross-pollination from existing knowledge and studies regarding nervous system physiology and pathology, as well as thoroughgoing collaborations between oncologists, neurobiologists, pathologists, clinicians, and researchers. This article offers an overview of current and recent past investigations on the roles of EVs in cancer–nerve crosstalk, as well as in neural development, physiology, inflammation, injury, and regeneration in the PNS. By highlighting the mechanisms involved in physiological and noncancerous pathological cellular crosstalk, we provide hints that may inspire additional translational studies on cancer–nerve interplay.
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Affiliation(s)
- Yuanning Guo
- Rappaport Family Institute for Research in the Medical Sciences, Technion—Israel Institute of Technology, Haifa 31096, Israel;
| | - Ziv Gil
- Rappaport Family Institute for Research in the Medical Sciences, Technion—Israel Institute of Technology, Haifa 31096, Israel;
- Head and Neck Institute, The Holy Family Hospital Nazareth, Nazareth 1641100, Israel
- Correspondence: ; Tel.: +972-4-854-2480
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Holguin BA, Hildenbrand ZL, Bernal RA. Insights Into the Role of Heat Shock Protein 27 in the Development of Neurodegeneration. Front Mol Neurosci 2022; 15:868089. [PMID: 35431800 PMCID: PMC9005852 DOI: 10.3389/fnmol.2022.868089] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 03/09/2022] [Indexed: 12/11/2022] Open
Abstract
Small heat shock protein 27 is a critically important chaperone, that plays a key role in several essential and varied physiological processes. These include thermotolerance, apoptosis, cytoskeletal dynamics, cell differentiation, protein folding, among others. Despite its relatively small size and intrinsically disordered termini, it forms large and polydisperse oligomers that are in equilibrium with dimers. This equilibrium is driven by transient interactions between the N-terminal region, the α-crystallin domain, and the C-terminal region. The continuous redistribution of binding partners results in a conformationally dynamic protein that allows it to adapt to different functions where substrate capture is required. However, the intrinsic disorder of the amino and carboxy terminal regions and subsequent conformational variability has made structural investigations challenging. Because heat shock protein 27 is critical for so many key cellular functions, it is not surprising that it also has been linked to human disease. Charcot-Marie-Tooth and distal hereditary motor neuropathy are examples of neurodegenerative disorders that arise from single point mutations in heat shock protein 27. The development of possible treatments, however, depends on our understanding of its normal function at the molecular level so we might be able to understand how mutations manifest as disease. This review will summarize recent reports describing investigations into the structurally elusive regions of Hsp27. Recent insights begin to provide the required context to explain the relationship between a mutation and the resulting loss or gain of function that leads to Charcot-Marie Tooth disease and distal hereditary motor neuropathy.
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Andries A, Van Walsem MR, Ørstavik K, Frich JC. Functional Ability and Physical Activity in Hereditary Neuromuscular Diseases. J Neuromuscul Dis 2022; 9:437-446. [PMID: 35180128 DOI: 10.3233/jnd-210677] [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: 11/15/2022]
Abstract
BACKGROUND Physical activity may help to promote health in patients with Limb-girdle muscular dystrophy (LGMD) and Charcot-Marie-Tooth disease (CMT). OBJECTIVE To investigate associations between functional ability and other variables, with physical activity in people with LGMD and CMT grouped according to the International Classification of Functioning, Disability, and Health (ICF). METHODS We did a cross-sectional study, recruiting respondents from the Norwegian registry of inherited neuromuscular disorders. We used the Norwegian version of Barthel index of Activities of Daily Living (ADL) to measure functional ability and the International Physical Activity Questionnaire -short form (IPAQ-sf) to classify physical activity. We used multivariable logistic regression analysis to investigate associations between variables. RESULTS 145 subjects were recruited (79 with CMT and 66 with LGMD). 55.6% of the subjects met a minimum recommendation of physical activity. Participants with moderate to severe functional ability were more likely to be physically inactive compared to those with normal functional ability (OR 19.7; 95% CI 3.1-127.2). Mildly decreased functional ability also showed higher odds of being physically inactive compared to participants with normal functional ability (OR 4.1; 95% CI 1.1-15.6). Higher education was associated with inactivity. Fatigue, participation in physiotherapy, and participation in adapted physical activity programs were not associated with physical activity. CONCLUSIONS Low functional ability was associated with physical inactivity in both LGMD and CMT. Association between higher education and inactivity might indicate the need to provide more understanding about physical activity benefit in this group.
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Affiliation(s)
- Aristomo Andries
- Department of Neurology, Oslo University Hospital, Nydalen, Oslo, Norway.,Institute of Health and Society, University of Oslo, Blindern, Oslo, Norway
| | - Marleen R Van Walsem
- Department of Neurology, Oslo University Hospital, Nydalen, Oslo, Norway.,Department of Neurohabilitation, Oslo University Hospital, Nydalen, Oslo, Norway.,Research Center for Habilitation and Rehabilitation Services and Models, Institute of Health and Society, University of Oslo, Blindern, Oslo, Norway
| | - Kristin Ørstavik
- Department of Neurology, Oslo University Hospital, Nydalen, Oslo, Norway
| | - Jan C Frich
- Institute of Health and Society, University of Oslo, Blindern, Oslo, Norway
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Sun X, Liu X, Zhao Q, Zhang M, Zhang L, Yuan H. Proximal nerve MR neurography with diffusion tensor imaging in differentiating subtypes of Charcot-Marie-Tooth disease. Eur Radiol 2022; 32:3855-3862. [PMID: 35084519 DOI: 10.1007/s00330-021-08506-4] [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: 08/03/2021] [Revised: 11/22/2021] [Accepted: 12/06/2021] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To evaluate the feasibility of proximal nerve MR neurography with diffusion tensor imaging (DTI) for differentiating Charcot-Marie-Tooth (CMT) 1A, CMT2, and healthy controls. METHODS The diameters, fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) of L4-L5 nerve roots, femoral nerve (FN), and sciatic nerve (SN) were compared. Receiver operating characteristic (ROC) curve analyses were conducted to evaluate the diagnostic performance. DeLong's tests were applied to compare multiple ROC curves. Intraclass correlation coefficients were calculated for interobserver agreement assessment. RESULTS The diameters of the L4 nerve root, L5 nerve root, and SN of CMT1A patients were significantly larger than those of CMT2 patients and healthy controls. The FA values of all measured proximal nerves were significantly higher in controls (0.46 ± 0.09, 0.46 ± 0.08, 0.45 ± 0.07, and 0.48 ± 0.08) than in CMT1A patients (0.30 ± 0.09, 0.29 ± 0.06, 0.35 ± 0.08, and 0.29 ± 0.09). The FA values of the L5 nerve root, FN, and SN were significantly higher in controls (0.46 ± 0.08, 0.45 ± 0.07, and 0.48 ± 0.08) than in CMT2 patients (0.36 ± 0.06, 0.34 ± 0.07, and 0.34 ± 0.10). The MD and RD values of the L5 nerve root in CMT1A patients (1.59 ± 0.21 and 1.37 ± 0.21) were higher than those in CMT2 patients (1.31 ± 0.17 and 1.05 ± 0.14). The AUCs of the above parameters ranged from 0.780 to 1.000. For the measurements of nerve diameters, the ICC ranged from 0.91 to 0.97. For the measurements of DTI metrics, the ICC ranged from 0.87 to 0.97. CONCLUSIONS MR neurography with DTI is able to differentiate CMT1A patients, CMT2 patients, and healthy controls. KEY POINTS • MR neurography with diffusion tensor imaging of the L4-5 nerve roots, proximal femoral nerve, and proximal sciatic nerve is able to discriminate CMT1A, CMT2, and healthy controls. • This method provides an alternative for the diagnosis and discrimination of CMT1A and CMT2, which is crucial for clinical management.
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Affiliation(s)
- Xingwen Sun
- Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, People's Republic of China
| | - Xiaoxuan Liu
- Department of Neurology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, People's Republic of China
| | - Qiang Zhao
- Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, People's Republic of China
| | - Mengze Zhang
- Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, People's Republic of China
| | - Lihua Zhang
- Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, People's Republic of China.
| | - Huishu Yuan
- Department of Radiology, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, People's Republic of China.
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Prichard KL, O'Brien NS, Murcia SR, Baker JR, McCluskey A. Role of Clathrin and Dynamin in Clathrin Mediated Endocytosis/Synaptic Vesicle Recycling and Implications in Neurological Diseases. Front Cell Neurosci 2022; 15:754110. [PMID: 35115907 PMCID: PMC8805674 DOI: 10.3389/fncel.2021.754110] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 12/10/2021] [Indexed: 12/17/2022] Open
Abstract
Endocytosis is a process essential to the health and well-being of cell. It is required for the internalisation and sorting of “cargo”—the macromolecules, proteins, receptors and lipids of cell signalling. Clathrin mediated endocytosis (CME) is one of the key processes required for cellular well-being and signalling pathway activation. CME is key role to the recycling of synaptic vesicles [synaptic vesicle recycling (SVR)] in the brain, it is pivotal to signalling across synapses enabling intracellular communication in the sensory and nervous systems. In this review we provide an overview of the general process of CME with a particular focus on two key proteins: clathrin and dynamin that have a central role to play in ensuing successful completion of CME. We examine these two proteins as they are the two endocytotic proteins for which small molecule inhibitors, often of known mechanism of action, have been identified. Inhibition of CME offers the potential to develop therapeutic interventions into conditions involving defects in CME. This review will discuss the roles and the current scope of inhibitors of clathrin and dynamin, providing an insight into how further developments could affect neurological disease treatments.
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Colaianni G, Oranger A, Dicarlo M, Lovero R, Storlino G, Pignataro P, Fontana A, Di Serio F, Ingravallo A, Caputo G, Di Leo A, Barone M, Grano M. Irisin Serum Levels and Skeletal Muscle Assessment in a Cohort of Charcot-Marie-Tooth Patients. Front Endocrinol (Lausanne) 2022; 13:886243. [PMID: 35634506 PMCID: PMC9134857 DOI: 10.3389/fendo.2022.886243] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 04/08/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Charcot-Marie-Tooth (CMT) indicates a group of inherited polyneuropathies whose clinical phenotypes primarily include progressive distal weakness and muscle atrophy. Compelling evidence showed that the exercise-mimetic myokine irisin protects against muscle wasting in an autocrine manner, thus possibly preventing the onset of musculoskeletal atrophy. Therefore, we sought to determine if irisin serum levels correlate with biochemical and muscle parameters in a cohort of CMT patients. METHODS This cohort study included individuals (N=20) diagnosed with CMT disease. Irisin and biochemical markers were quantified in sera. Skeletal muscle mass (SMM) was evaluated by bioelectric impedance analysis, muscle strength by handgrip, and muscle quality was derived from muscle strength and muscle mass ratio. RESULTS CMT patients (m/f, 12/8) had lower irisin levels than age and sex matched healthy subjects (N=20) (6.51 ± 2.26 vs 9.34 ± 3.23 μg/ml; p=0.003). SMM in CMT patients was always lower compared to SMM reference values reported in healthy Caucasian population matched for age and sex. Almost the totality of CMT patients (19/20) showed low muscle quality and therefore patients were evaluated on the basis of muscle strength. Irisin was lower in presence of pathological compared to normal muscle strength (5.56 ± 1.26 vs 7.67 ± 2.72 μg/ml; p=0.03), and directly correlated with the marker of bone formation P1PN (r= 0.669; 95%CI 0.295 to 0.865; p=0.002), but inversely correlated with Vitamin D (r=-0.526; 95%CI -0,791 to -0,095; p=0.017). Surprisingly, in women, irisin levels were higher than in men (7.31 ± 2.53 vs 5.31 ± 1.02 μg/ml, p=0.05), and correlated with both muscle strength (r=0.759; 95%CI 0.329 to 0.929; p=0.004) and muscle quality (r=0.797; 95%CI 0.337 to 0.950; p=0.006). CONCLUSION Our data demonstrate lower irisin levels in CMT patients compared to healthy subjects. Moreover, among patients, we observed, significantly higher irisin levels in women than in men, despite the higher SMM in the latter. Future studies are necessary to establish whether, in this clinical contest, irisin could represent a marker of the loss of muscle mass and strength and/or bone loss.
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Affiliation(s)
- Graziana Colaianni
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Angela Oranger
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Manuela Dicarlo
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | - Roberto Lovero
- Clinical Pathology Unit, Polyclinic of Bari, Bari, Italy
| | - Giuseppina Storlino
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Patrizia Pignataro
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari, Bari, Italy
| | | | | | - Angelica Ingravallo
- Gastroenterology Unit, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Giuseppe Caputo
- Territorial Neurology Service of Parkinson Disease and Movement Disorders Network - Apulia - Azienda Sanitaria Locale (ASL) Bari, Bari, Italy
| | - Alfredo Di Leo
- Gastroenterology Unit, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Michele Barone
- Gastroenterology Unit, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
| | - Maria Grano
- Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy
- *Correspondence: Maria Grano,
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Napoli R, Visonà E. Deep vein thrombosis and acute hepatitis after ChAdOx1 nCov-19 vaccination in a Charcot-Marie-Tooth patient: a case report. Clin Exp Vaccine Res 2022; 11:294-297. [DOI: 10.7774/cevr.2022.11.3.294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/22/2022] [Indexed: 11/22/2022] Open
Affiliation(s)
| | - Enrico Visonà
- Ortopedia 1, Istituto Clinico Città di Brescia, Brescia, Italy
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38
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Boyer O, Mollet G, Dorval G. Neurological involvement in monogenic podocytopathies. Pediatr Nephrol 2021; 36:3571-3583. [PMID: 33791874 DOI: 10.1007/s00467-020-04903-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 10/27/2020] [Accepted: 12/11/2020] [Indexed: 01/22/2023]
Abstract
Genetic studies of hereditary nephrotic syndrome (NS) have identified more than 50 genes that, if mutated, are responsible for monogenic forms of steroid-resistant NS (SRNS), either isolated or syndromic. Most of these genes encode proteins expressed in the podocyte with various functions such as transcription factors, mitochondrial proteins, or enzymes, but mainly structural proteins of the slit diaphragm (SD) as well as cytoskeletal binding and regulator proteins. Syndromic NS is sometimes associated with neurological features. Over recent decades, various studies have established links between the physiology of podocytes and neurons, both morphologically (slit diaphragm and synapse) and functionally (signaling platforms). Variants in genes expressed in different compartments of the podocyte and neurons are responsible for phenotypes associating kidney lesions with proteinuria (mainly Focal and Segmental Glomerulosclerosis (FSGS) or Diffuse Mesangial Sclerosis (DMS)) and central and/or peripheral neurological disorders. The Galloway-Mowat syndrome (GAMOS, OMIM#251300) associates neurological defects, microcephaly, and proteinuria and is caused by variants in genes encoding proteins of various functions (microtubule cytoskeleton regulation (WDR73), regulation of protein synthesis via transfer RNAs (KEOPS and WDR4 complexes)). Pierson syndrome (OMIM#609049) associating congenital nephrotic syndrome and central neurological and ophthalmological anomalies is secondary to variants in LAMB2, involved in glomerular and ocular basement membranes. Finally, Charcot-Marie-Tooth-FSGS (OMIM#614455) combines peripheral sensory-motor neuropathy and proteinuria and arises from INF2 variants, resulting in cytoskeletal polymerization defects. This review focuses on genetic syndromes associating nephrotic range proteinuria and neurological involvement and provides the latest advances in the description of these neuro-renal disorders.
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Affiliation(s)
- Olivia Boyer
- Service de Néphrologie Pédiatrique, AP-HP, Centre de Référence de maladies rénales rares de l'enfant et de l'adulte (MARHEA), Hôpital Necker - Enfants Malades, 149 Rue de Sèvres, 75015, Paris, France.
- Institut Imagine, Laboratoire des maladies rénales héréditaires, INSERM UMR 1163, Université de Paris, Paris, France.
| | - Géraldine Mollet
- Institut Imagine, Laboratoire des maladies rénales héréditaires, INSERM UMR 1163, Université de Paris, Paris, France
| | - Guillaume Dorval
- Institut Imagine, Laboratoire des maladies rénales héréditaires, INSERM UMR 1163, Université de Paris, Paris, France
- Service de Génétique Moléculaire, AP-HP, Hôpital Necker-Enfants Malades, Paris, France
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Kovale S, Terauda R, Millere E, Taurina G, Murmane D, Isakova J, Kenina V, Gailite L. GJB1 Gene Analysis in Two Extended Families with X-Linked Charcot-Marie-Tooth Disease. Case Rep Neurol 2021; 13:422-428. [PMID: 34326750 PMCID: PMC8299378 DOI: 10.1159/000515170] [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: 12/10/2020] [Accepted: 01/21/2021] [Indexed: 11/25/2022] Open
Abstract
X-linked Charcot-Marie-Tooth (CMT) disease type I (CMTX1) is the second most frequent type of CMT disease caused by pathogenic variants in the GJB1 gene. We described 2 extended cases (families) with CMTX1 with identified pathogenic variants – p.Val139Met and p.Arg215Trp. In both the families, neurological symptoms started earlier in male than in female patients. In some family members, molecular diagnostics was performed prior to neurological investigation due to family cascade screening. There was variable neurological phenotype representing CMT. Conclusions: There is a large clinical heterogeneity in CMTX, even amongst the family members.
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Affiliation(s)
- Sabine Kovale
- Scientific Laboratory of Molecular Genetics, Riga Stradins University, Riga, Latvia
| | - Ruta Terauda
- Scientific Laboratory of Molecular Genetics, Riga Stradins University, Riga, Latvia
| | - Elina Millere
- Scientific Laboratory of Molecular Genetics, Riga Stradins University, Riga, Latvia.,Children's Clinical University Hospital, Riga, Latvia
| | - Gita Taurina
- Children's Clinical University Hospital, Riga, Latvia
| | - Daiga Murmane
- Children's Clinical University Hospital, Riga, Latvia
| | - Jekaterina Isakova
- Scientific Laboratory of Molecular Genetics, Riga Stradins University, Riga, Latvia
| | - Viktorija Kenina
- Scientific Laboratory of Molecular Genetics, Riga Stradins University, Riga, Latvia.,Children's Clinical University Hospital, Riga, Latvia
| | - Linda Gailite
- Scientific Laboratory of Molecular Genetics, Riga Stradins University, Riga, Latvia
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40
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Biondo ED, Spontarelli K, Ababioh G, Méndez L, Artigas P. Diseases caused by mutations in the Na +/K + pump α1 gene ATP1A1. Am J Physiol Cell Physiol 2021; 321:C394-C408. [PMID: 34232746 DOI: 10.1152/ajpcell.00059.2021] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Human cell survival requires function of the Na+/K+ pump; the heteromeric protein that hydrolyzes ATP to extrude Na+ and import K+ across the plasmalemma, thereby building and maintaining these ions' electrochemical gradients. Numerous dominant diseases caused by mutations in genes encoding for Na+/K+ pump catalytic (α) subunit isoforms highlight the importance of this protein. Here, we review literature describing disorders caused by missense mutations in ATP1A1, the gene encoding the ubiquitously expressed α1 isoform of the Na+/K+ pump. These various maladies include primary aldosteronism with secondary hypertension, an endocrine syndrome, Charcot-Marie-Tooth disease, a peripheral neuropathy, complex spastic paraplegia, another neuromuscular disorder, as well as hypomagnesemia accompanied by seizures and cognitive delay, a condition affecting the renal and central nervous systems. This article focuses on observed commonalities among these mutations' functional effects, as well as on the special characteristics that enable each particular mutation to exclusively affect a certain system, without affecting others. In this respect, it is clear how somatic mutations localized to adrenal adenomas increase aldosterone production without compromising other systems. However, it remains largely unknown how and why some but not all de novo germline or familial mutations (where the mutant must be expressed in numerous tissues) produce a specific disease and not the other diseases. We propose hypotheses to explain this observation and the approaches that we think will drive future research on these debilitating disorders to develop novel patient-specific treatments by combining the use of heterologous protein-expression systems, patient-derived pluripotent cells, and gene-edited cell and mouse models.
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Affiliation(s)
- Elisa D Biondo
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Kerri Spontarelli
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Giovanna Ababioh
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Lois Méndez
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - Pablo Artigas
- Department of Cell Physiology and Molecular Biophysics, Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, Texas
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Sieberg CB, Lebel A, Silliman E, Holmes S, Borsook D, Elman I. Left to themselves: Time to target chronic pain in childhood rare diseases. Neurosci Biobehav Rev 2021; 126:276-288. [PMID: 33774086 PMCID: PMC8738995 DOI: 10.1016/j.neubiorev.2021.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 02/02/2021] [Accepted: 03/04/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND Chronic pain is prevalent among patients with rare diseases (RDs). However, little is understood about how biopsychosocial mechanisms may be integrated in the unique set of clinical features and therapeutic challenges inherent in their pain conditions. METHODS This review presents examples of major categories of RDs with particular pain conditions. In addition, we provide translational evidence on clinical and scientific rationale for psychosocially- and neurodevelopmentally-informed treatment of pain in RD patients. RESULTS Neurobiological and functional overlap between various RD syndromes and pain states suggests amalgamation and mutual modulation of the respective conditions. Emotional sequelae could be construed as an emotional homologue of physical pain mediated via overlapping brain circuitry. Given their clearly defined genetic and molecular etiologies, RDs may serve as heuristic models for unraveling pathophysiological processes inherent in chronic pain. CONCLUSIONS Systematic evaluation of chronic pain in patients with RD contributes to sophisticated insight into both pain and their psychosocial correlates, which could transform treatment.
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Affiliation(s)
- Christine B Sieberg
- Biobehavioral Pediatric Pain Lab, Department of Psychiatry & Behavioral Sciences, Boston Children's Hospital, Boston, MA, 02115, USA; Center for Pain and the Brain (P.A.I.N Group), Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Department of Psychiatry, Harvard Medical School, Boston, MA, 02115, USA
| | - Alyssa Lebel
- Center for Pain and the Brain (P.A.I.N Group), Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Department of Anesthesiology, Harvard Medical School, Boston, MA, 02115, USA
| | - Erin Silliman
- Biobehavioral Pediatric Pain Lab, Department of Psychiatry & Behavioral Sciences, Boston Children's Hospital, Boston, MA, 02115, USA; Division of Graduate Medical Sciences, Boston University School of Medicine, Boston, MA, 02118, USA
| | - Scott Holmes
- Center for Pain and the Brain (P.A.I.N Group), Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Department of Anesthesiology, Harvard Medical School, Boston, MA, 02115, USA
| | - David Borsook
- Center for Pain and the Brain (P.A.I.N Group), Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Department of Anesthesiology, Harvard Medical School, Boston, MA, 02115, USA; Department of Psychiatry, Massachusetts General Hospital, Boston, MA, 02114, USA.
| | - Igor Elman
- Center for Pain and the Brain (P.A.I.N Group), Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children's Hospital, Boston, MA 02115, USA; Cambridge Health Alliance, Harvard Medical School, Cambridge, MA, 02139, USA
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Visser HJ, Wolfe J, Kouri R, Aviles R. Neurologic Conditions Associated with Cavus Foot Deformity. Clin Podiatr Med Surg 2021; 38:323-342. [PMID: 34053647 DOI: 10.1016/j.cpm.2021.03.001] [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] [Indexed: 10/21/2022]
Abstract
The cavus foot deformity is an often less understood deformity within the spectrum of foot and ankle conditions. The hallmark concern is the possibility of an underlying neurologic or neuromuscular disorder. Although a proportion of these deformities are idiopathic, a significant majority do correlate with an underlying disorder. The appropriate evaluation of this deformity, in coordination within the multidisciplinary scope of health care, allows for a timely diagnosis and understanding of the patient's condition. We provide an abbreviated survey of possible underlying etiologies for the patient with the cavus foot deformity as a reference to the foot and ankle surgeon.
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Affiliation(s)
- Harry John Visser
- Foot and Ankle Surgery Residency, SSM Health DePaul Hospital, 12303 DePaul Drive, Suite 701, St Louis, MO 63044, USA
| | - Joshua Wolfe
- Foot and Ankle Surgery Residency, SSM Health DePaul Hospital, 12303 DePaul Drive, Suite 701, St Louis, MO 63044, USA.
| | - Rekha Kouri
- Foot and Ankle Surgery Residency, SSM Health DePaul Hospital, 12303 DePaul Drive, Suite 701, St Louis, MO 63044, USA
| | - Raul Aviles
- Foot and Ankle Surgery Residency, SSM Health DePaul Hospital, 12303 DePaul Drive, Suite 701, St Louis, MO 63044, USA
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43
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Dietary Supplementation for Para-Athletes: A Systematic Review. Nutrients 2021; 13:nu13062016. [PMID: 34208239 PMCID: PMC8230900 DOI: 10.3390/nu13062016] [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: 05/07/2021] [Revised: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 12/31/2022] Open
Abstract
The use of dietary supplements is high among athletes and non-athletes alike, as well as able-bodied individuals and those with impairments. However, evidence is lacking in the use of dietary supplements for sport performance in a para-athlete population (e.g., those training for the Paralympics or similar competition). Our objective was to examine the literature regarding evidence for various sport supplements in a para-athlete population. A comprehensive literature search was conducted using PubMed, SPORTDiscus, MedLine, and Rehabilitation and Sports Medicine Source. Fifteen studies met our inclusion criteria and were included in our review. Seven varieties of supplements were investigated in the studies reviewed, including caffeine, creatine, buffering agents, fish oil, leucine, and vitamin D. The evidence for each of these supplements remains inconclusive, with varying results between studies. Limitations of research in this area include the heterogeneity of the subjects within the population regarding functionality and impairment. Very few studies included individuals with impairments other than spinal cord injury. Overall, more research is needed to strengthen the evidence for or against supplement use in para-athletes. Future research is also recommended on performance in para-athlete populations with classifiable impairments other than spinal cord injuries.
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Péladeau C, Sandhu JK. Aberrant NLRP3 Inflammasome Activation Ignites the Fire of Inflammation in Neuromuscular Diseases. Int J Mol Sci 2021; 22:ijms22116068. [PMID: 34199845 PMCID: PMC8200055 DOI: 10.3390/ijms22116068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 05/30/2021] [Accepted: 06/01/2021] [Indexed: 12/24/2022] Open
Abstract
Inflammasomes are molecular hubs that are assembled and activated by a host in response to various microbial and non-microbial stimuli and play a pivotal role in maintaining tissue homeostasis. The NLRP3 is a highly promiscuous inflammasome that is activated by a wide variety of sterile triggers, including misfolded protein aggregates, and drives chronic inflammation via caspase-1-mediated proteolytic cleavage and secretion of proinflammatory cytokines, interleukin-1β and interleukin-18. These cytokines further amplify inflammatory responses by activating various signaling cascades, leading to the recruitment of immune cells and overproduction of proinflammatory cytokines and chemokines, resulting in a vicious cycle of chronic inflammation and tissue damage. Neuromuscular diseases are a heterogeneous group of muscle disorders that involve injury or dysfunction of peripheral nerves, neuromuscular junctions and muscles. A growing body of evidence suggests that dysregulation, impairment or aberrant NLRP3 inflammasome signaling leads to the initiation and exacerbation of pathological processes associated with neuromuscular diseases. In this review, we summarize the available knowledge about the NLRP3 inflammasome in neuromuscular diseases that affect the peripheral nervous system and amyotrophic lateral sclerosis, which affects the central nervous system. In addition, we also examine whether therapeutic targeting of the NLRP3 inflammasome components is a viable approach to alleviating the detrimental phenotype of neuromuscular diseases and improving clinical outcomes.
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Affiliation(s)
- Christine Péladeau
- Human Health Therapeutics Research Centre, National Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;
| | - Jagdeep K. Sandhu
- Human Health Therapeutics Research Centre, National Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, 451 Smyth Road, Ottawa, ON K1H 8M5, Canada
- Correspondence: ; Tel.: +1-613-993-5304
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Böhme MA, McCarthy AW, Blaum N, Berezeckaja M, Ponimaskine K, Schwefel D, Walter AM. Glial Synaptobrevin mediates peripheral nerve insulation, neural metabolic supply, and is required for motor function. Glia 2021; 69:1897-1915. [PMID: 33811396 DOI: 10.1002/glia.24000] [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: 09/18/2020] [Revised: 03/12/2021] [Accepted: 03/17/2021] [Indexed: 01/10/2023]
Abstract
Peripheral nerves contain sensory and motor neuron axons coated by glial cells whose interplay ensures function, but molecular details are lacking. SNARE-proteins mediate the exchange and secretion of cargo by fusing vesicles with target organelles, but how glial SNAREs contribute to peripheral nerve function is largely unknown. We, here, identify non-neuronal Synaptobrevin (Syb) as the essential vesicular SNARE in Drosophila peripheral glia to insulate and metabolically supply neurons. We show that tetanus neurotoxin light chain (TeNT-LC), which potently inhibits SNARE-mediated exocytosis from neurons, also impairs peripheral nerve function when selectively expressed in glia, causing nerve disintegration, defective axonal transport, tetanic muscle hyperactivity, impaired locomotion, and lethality. While TeNT-LC disrupts neural function by cleaving neuronal Synaptobrevin (nSyb), it targets non-neuronal Synaptobrevin (Syb) in glia, which it cleaves at low rates: Glial knockdown of Syb (but not nSyb) phenocopied glial TeNT-LC expression whose effects were reverted by a TeNT-LC-insensitive Syb mutant. We link Syb-necessity to two distinct glial subtypes: Impairing Syb function in subperineurial glia disrupted nerve morphology, axonal transport, and locomotion, likely, because nerve-isolating septate junctions (SJs) could not form as essential SJ components (like the cell adhesion protein Neurexin-IV) were mistargeted. Interference with Syb in axon-encircling wrapping glia left nerve morphology and locomotion intact but impaired axonal transport, likely because neural metabolic supply was disrupted due to the mistargeting of metabolite shuffling monocarboxylate transporters. Our study identifies crucial roles of Syb in various glial subtypes to ensure glial-glial and glial-neural interplay needed for proper nerve function, animal motility, and survival.
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Affiliation(s)
- Mathias A Böhme
- Molecular and Theoretical Neuroscience, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), FMP im CharitéCrossOver, Berlin, Germany.,Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anthony W McCarthy
- Molecular and Theoretical Neuroscience, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), FMP im CharitéCrossOver, Berlin, Germany
| | - Natalie Blaum
- Molecular and Theoretical Neuroscience, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), FMP im CharitéCrossOver, Berlin, Germany
| | - Monika Berezeckaja
- Molecular and Theoretical Neuroscience, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), FMP im CharitéCrossOver, Berlin, Germany
| | - Kristina Ponimaskine
- Molecular and Theoretical Neuroscience, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), FMP im CharitéCrossOver, Berlin, Germany
| | - David Schwefel
- Institute of Medical Physics and Biophysics, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Alexander M Walter
- Molecular and Theoretical Neuroscience, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), FMP im CharitéCrossOver, Berlin, Germany.,Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Navaratnarajah T, Anand R, Reichert AS, Distelmaier F. The relevance of mitochondrial morphology for human disease. Int J Biochem Cell Biol 2021; 134:105951. [PMID: 33610749 DOI: 10.1016/j.biocel.2021.105951] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 02/01/2021] [Accepted: 02/03/2021] [Indexed: 12/18/2022]
Abstract
Mitochondria are highly dynamic organelles, which undergo frequent structural and metabolic changes to fulfil cellular demands. To facilitate these processes several proteins are required to regulate mitochondrial shape and interorganellar communication. These proteins include the classical mitochondrial fusion (MFN1, MFN2, and OPA1) and fission proteins (DRP1, MFF, FIS1, etc.) as well as several other proteins that are directly or indirectly involved in these processes (e.g. YME1L, OMA1, INF2, GDAP1, MIC13, etc.). During the last two decades, inherited genetic defects in mitochondrial fusion and fission proteins have emerged as an important class of neurodegenerative human diseases with variable onset ranging from infancy to adulthood. So far, no causal treatment strategies are available for these disorders. In this review, we provide an overview about the current knowledge on mitochondrial dynamics under physiological conditions. Moreover, we describe human diseases, which are associated with genetic defects in these pathways.
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Affiliation(s)
- Tharsini Navaratnarajah
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Ruchika Anand
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich-Heine-University-Düsseldorf, Düsseldorf, Germany
| | - Andreas S Reichert
- Institute of Biochemistry and Molecular Biology I, Medical Faculty, Heinrich-Heine-University-Düsseldorf, Düsseldorf, Germany
| | - Felix Distelmaier
- Department of General Pediatrics, Neonatology and Pediatric Cardiology, Medical Faculty, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany.
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Sun B, He ZQ, Li YR, Bai JM, Wang HR, Wang HF, Cui F, Yang F, Huang XS. Screening for SH3TC2 variants in Charcot-Marie-Tooth disease in a cohort of Chinese patients. Acta Neurol Belg 2021; 122:1169-1175. [PMID: 33587240 DOI: 10.1007/s13760-021-01605-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 01/18/2021] [Indexed: 11/28/2022]
Abstract
Mutations in the SH3TC2 gene cause Charcot-Marie-Tooth disease type 4C (CMT4C), characterized by inherited demyelinating peripheral neuropathy. CMT4C is a common form of CMT4/autosomal recessive (AR) CMT1. This study examined the SH3TC2 variants, investigated genotype-phenotype correlations and explored the frequency of CMT4C in Chinese patients. A total of 206 unrelated patients of Chinese Han descent clinically diagnosed with CMT were recruited. All patients underwent detailed history-taking, neurological examination, laboratory workups, and electrophysiological studies. Genetic analysis was performed via high-throughput target sequencing (NGS). Three patients, one male and two females, were found to carry five SH3TC2 mutations: patient 1 (c.3154C > T, p.R1054X; c.929G > A, p.G310E); Patient 2 (c.2872_2872del, p.S958fs; c.3710C > T, p.A1237V) and Patient 3 (c.2782C > T, p.Q928X; c.929G > A, p.G310E). The c.2872_2872del, c.3710C > T and c.2782C > T variants were not reported before. CMT4C caused by SH3TC2 mutation is a very common type of CMT4/AR CMT1. Three novel mutations, c.2872_2872del, c.3710C > T and c.2782C > T, were found in this study. Combination of clinical phenotype, nerve conduction studies, genetic analysis and bioinformatics analysis are of vital importance in patients suspected as CMT.
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Affiliation(s)
- Bo Sun
- Neurological Department of the First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
- Geriatric Neurological Department of the Second Medical Center and National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, 100853, China
| | - Zheng-Qing He
- Neurological Department of the First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Yan-Ran Li
- Neurological Department of the First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Jiong-Ming Bai
- Neurological Department of the First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
- College of Medicine, Nankai University, Tianjin, China
| | - Hao-Ran Wang
- Neurological Department of the First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
- College of Medicine, Nankai University, Tianjin, China
| | - Hong-Fen Wang
- Neurological Department of the First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Fang Cui
- Neurological Department of the First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Fei Yang
- Neurological Department of the First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China
| | - Xu-Sheng Huang
- Neurological Department of the First Medical Center, Chinese PLA General Hospital, No. 28 Fuxing Road, Haidian District, Beijing, 100853, China.
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Abdala R, Levi L, Longobardi V, Zanchetta MB. Severe bone microarchitecture deterioration in a family with hereditary neuropathy: evidence of the key role of the mechanostat. Osteoporos Int 2020; 31:2477-2480. [PMID: 33047192 DOI: 10.1007/s00198-020-05674-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/06/2020] [Indexed: 11/25/2022]
Abstract
In this report, we present three cases of individuals from the same family with a diagnosis of CMT with severe tibia bone microarchitecture deterioration assessed by HR-pQCT. Charcot-Marie-Tooth disease (CMT) or hereditary neuropathy involves both motor and sensory nerves. Falls are often the first manifestation in these patients and represent an important risk factor for fracture. The reduction of mechanical input on bone inhibits bone formation by osteoblasts and accelerates bone resorption by osteoclasts, leading to disuse osteoporosis. We report three cases of individuals from the same family with a diagnosis of CMT with severe tibia bone microarchitecture deterioration assessed by high-resolution peripheral quantitative computed tomography (HR-pQCT). This affectation was exclusive to the tibia; the radius remained undamaged, showing the consequences of the lack of mobility and mechanical stimulation. Physical activity and rehabilitation, in addition to adequate calcium and vitamin D supplementation, may play an essential role in the management of this disease.
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Affiliation(s)
- R Abdala
- IDIM, Libertad 836, 1st Floor, Zip code 1012, Buenos Aires, Argentina.
- Cátedra de Osteología y Metabolismo Mineral, Universidad del Salvador, Buenos Aires, Argentina.
| | - L Levi
- IDIM, Libertad 836, 1st Floor, Zip code 1012, Buenos Aires, Argentina
| | - V Longobardi
- IDIM, Libertad 836, 1st Floor, Zip code 1012, Buenos Aires, Argentina
- Cátedra de Osteología y Metabolismo Mineral, Universidad del Salvador, Buenos Aires, Argentina
| | - M B Zanchetta
- IDIM, Libertad 836, 1st Floor, Zip code 1012, Buenos Aires, Argentina
- Cátedra de Osteología y Metabolismo Mineral, Universidad del Salvador, Buenos Aires, Argentina
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Effect of Caffeine Consumption on the Risk for Neurological and Psychiatric Disorders: Sex Differences in Human. Nutrients 2020; 12:nu12103080. [PMID: 33050315 PMCID: PMC7601837 DOI: 10.3390/nu12103080] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/02/2020] [Accepted: 10/04/2020] [Indexed: 02/06/2023] Open
Abstract
Caffeine occurs naturally in various foods, such as coffee, tea, and cocoa, and it has been used safely as a mild stimulant for a long time. However, excessive caffeine consumption (1~1.5 g/day) can cause caffeine poisoning (caffeinism), which includes symptoms such as anxiety, agitation, insomnia, and gastrointestinal disorders. Recently, there has been increasing interest in the effect of caffeine consumption as a protective factor or risk factor for neurological and psychiatric disorders. Currently, the importance of personalized medicine is being emphasized, and research on sex/gender differences needs to be conducted. Our review focuses on the effect of caffeine consumption on several neurological and psychiatric disorders with respect to sex differences to provide a better understanding of caffeine use as a risk or protective factor for those disorders. The findings may help establish new strategies for developing sex-specific caffeine therapies.
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Rönkkö J, Molchanova S, Revah‐Politi A, Pereira EM, Auranen M, Toppila J, Kvist J, Ludwig A, Neumann J, Bultynck G, Humblet‐Baron S, Liston A, Paetau A, Rivera C, Harms MB, Tyynismaa H, Ylikallio E. Dominant mutations in ITPR3 cause Charcot-Marie-Tooth disease. Ann Clin Transl Neurol 2020; 7:1962-1972. [PMID: 32949214 PMCID: PMC7545616 DOI: 10.1002/acn3.51190] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 08/24/2020] [Accepted: 08/24/2020] [Indexed: 01/09/2023] Open
Abstract
OBJECTIVE ITPR3, encoding inositol 1,4,5-trisphosphate receptor type 3, was previously reported as a potential candidate disease gene for Charcot-Marie-Tooth neuropathy. Here, we present genetic and functional evidence that ITPR3 is a Charcot-Marie-Tooth disease gene. METHODS Whole-exome sequencing of four affected individuals in an autosomal dominant family and one individual who was the only affected individual in his family was used to identify disease-causing variants. Skin fibroblasts from two individuals of the autosomal dominant family were analyzed functionally by western blotting, quantitative reverse transcription PCR, and Ca2+ imaging. RESULTS Affected individuals in the autosomal dominant family had onset of symmetrical neuropathy with demyelinating and secondary axonal features at around age 30, showing signs of gradual progression with severe distal leg weakness and hand involvement in the proband at age 64. Exome sequencing identified a heterozygous ITPR3 p.Val615Met variant segregating with the disease. The individual who was the only affected in his family had disease onset at age 4 with demyelinating neuropathy. His condition was progressive, leading to severe muscle atrophy below knees and atrophy of proximal leg and hand muscles by age 16. Trio exome sequencing identified a de novo ITPR3 variant p.Arg2524Cys. Altered Ca2+ -transients in p.Val615Met patient fibroblasts suggested that the variant has a dominant-negative effect on inositol 1,4,5-trisphosphate receptor type 3 function. INTERPRETATION Together with two previously identified variants, our report adds further evidence that ITPR3 is a disease-causing gene for CMT and indicates altered Ca2+ homeostasis in disease pathogenesis.
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Affiliation(s)
- Julius Rönkkö
- Stem Cells and Metabolism Research ProgramFaculty of MedicineUniversity of HelsinkiHelsinkiFinland
| | - Svetlana Molchanova
- Stem Cells and Metabolism Research ProgramFaculty of MedicineUniversity of HelsinkiHelsinkiFinland
- Molecular and Integrative Biosciences Research ProgramFaculty of Bio‐ and Environmental SciencesUniversity of HelsinkiHelsinkiFinland
| | - Anya Revah‐Politi
- Institute for Genomic MedicineColumbia University Medical CenterNew YorkNew YorkUSA
- Precision Genomics LaboratoryColumbia University Irving Medical CenterNew YorkNew YorkUSA
| | - Elaine M. Pereira
- Department of PediatricsColumbia University Irving Medical CenterNew YorkNew YorkUSA
| | - Mari Auranen
- Clinical NeurosciencesNeurologyUniversity of Helsinki and Helsinki University HospitalHelsinkiFinland
| | - Jussi Toppila
- Department of Clinical NeurophysiologyMedical Imaging CenterHelsinki University Central HospitalHelsinkiFinland
| | - Jouni Kvist
- Stem Cells and Metabolism Research ProgramFaculty of MedicineUniversity of HelsinkiHelsinkiFinland
| | - Anastasia Ludwig
- Neuroscience CenterHelsinki Institute of Life ScienceUniversity of HelsinkiHelsinkiFinland
| | - Julika Neumann
- Department of Microbiology and ImmunologyLaboratory of Adaptive ImmunityKU LeuvenLeuvenBelgium
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
| | - Geert Bultynck
- Laboratory of Molecular and Cellular SignalingDepartment of Cellular and Molecular Medicine & Leuven Kanker InstituutKU LeuvenLeuvenBelgium
| | | | - Adrian Liston
- Department of Microbiology and ImmunologyLaboratory of Adaptive ImmunityKU LeuvenLeuvenBelgium
- VIB‐KU Leuven Center for Brain and Disease ResearchLeuvenBelgium
- Laboratory of Lymphocyte Signalling and DevelopmentBabraham InstituteCambridgeUnited Kingdom
| | - Anders Paetau
- Department of PathologyHUSLAB and University of HelsinkiHelsinkiFinland
| | - Claudio Rivera
- Neuroscience CenterHelsinki Institute of Life ScienceUniversity of HelsinkiHelsinkiFinland
- Institut de Neurobiologie de la Méditerranée INMED UMR901MarseilleFrance
| | | | - Henna Tyynismaa
- Stem Cells and Metabolism Research ProgramFaculty of MedicineUniversity of HelsinkiHelsinkiFinland
- Neuroscience CenterHelsinki Institute of Life ScienceUniversity of HelsinkiHelsinkiFinland
- Department of Medical and Clinical GeneticsUniversity of HelsinkiHelsinkiFinland
| | - Emil Ylikallio
- Stem Cells and Metabolism Research ProgramFaculty of MedicineUniversity of HelsinkiHelsinkiFinland
- Clinical NeurosciencesNeurologyUniversity of Helsinki and Helsinki University HospitalHelsinkiFinland
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