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Masingue M, Fernández-Eulate G, Debs R, Tard C, Labeyrie C, Leonard-Louis S, Dhaenens CM, Masson MA, Latour P, Stojkovic T. Strategy for genetic analysis in hereditary neuropathy. Rev Neurol (Paris) 2023; 179:10-29. [PMID: 36566124 DOI: 10.1016/j.neurol.2022.11.007] [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: 10/31/2022] [Revised: 11/26/2022] [Accepted: 11/28/2022] [Indexed: 12/24/2022]
Abstract
Inherited neuropathies are a heterogeneous group of slowly progressive disorders affecting either motor, sensory, and/or autonomic nerves. Peripheral neuropathy may be the major component of a disease such as Charcot-Marie-Tooth disease or a feature of a more complex multisystemic disease involving the central nervous system and other organs. The goal of this review is to provide the clinical clues orientating the genetic diagnosis in a patient with inherited peripheral neuropathy. This review focuses on primary inherited neuropathies, amyloidosis, inherited metabolic diseases, while detailing clinical, neurophysiological and potential treatment of these diseases.
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Affiliation(s)
- M Masingue
- Centre de référence des maladies neuromusculaires Nord/Est/Île-de-France, hôpital Pitié-Salpêtrière, AP-HP, Paris, France.
| | - G Fernández-Eulate
- Centre de référence des maladies neuromusculaires Nord/Est/Île-de-France, hôpital Pitié-Salpêtrière, AP-HP, Paris, France
| | - R Debs
- Service de neurophysiologie, hôpital Pitié-Salpêtrière, AP-HP, Paris, France
| | - C Tard
- CHU de Lille, clinique neurologique, centre de référence des maladies neuromusculaires Nord/Est/Île-de-France, 59037 Lille cedex, France
| | - C Labeyrie
- Service de neurologie, hôpital Kremlin-Bicêtre, AP-HP, Le Kremlin-Bicêtre, France
| | - S Leonard-Louis
- Centre de référence des maladies neuromusculaires Nord/Est/Île-de-France, hôpital Pitié-Salpêtrière, AP-HP, Paris, France
| | - C-M Dhaenens
- Université de Lille, Inserm, CHU de Lille, U1172-LilNCog-Lille Neuroscience & Cognition, 59000 Lille, France
| | - M A Masson
- Inserm U1127, Paris Brain Institute, ICM, Sorbonne Université, CNRS UMR 7225, hôpital Pitié-Salpêtrière, Paris, France
| | - P Latour
- Service de biochimie biologie moléculaire, CHU de Lyon, centre de biologie et pathologie Est, 69677 Bron cedex, France
| | - T Stojkovic
- Centre de référence des maladies neuromusculaires Nord/Est/Île-de-France, hôpital Pitié-Salpêtrière, AP-HP, Paris, France
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Dong HL, Ma Y, Yu H, Wei Q, Li JQ, Liu GL, Li HF, Chen L, Chen DF, Bai G, Wu ZY. Bi-allelic loss of function variants in COX20 gene cause autosomal recessive sensory neuronopathy. Brain 2021; 144:2457-2470. [PMID: 33751098 DOI: 10.1093/brain/awab135] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 01/18/2021] [Accepted: 01/30/2021] [Indexed: 12/24/2022] Open
Abstract
Sensory neuronopathies are a rare and distinct subgroup of peripheral neuropathies, characterized by degeneration of the dorsal root ganglia neurons. About 50% of sensory neuronopathies are idiopathic and genetic causes remain to be clarified. Through a combination of homozygosity mapping and whole exome sequencing, we linked an autosomal recessive sensory neuronopathy to pathogenic variants in COX20 gene. We identified 8 unrelated families from the eastern China population carrying a founder variant c.41A>G (p. Lys14Arg) within COX20 in either a homozygous or compound heterozygous state. All patients displayed sensory ataxia with non-length-dependent sensory potentials decrease. COX20 encodes a key transmembrane protein implicated in the assembly of mitochondrial complex IV. We showed that COX20 variants lead to reduction of COX20 protein in patient's fibroblasts and transfected cell lines, consistent with a loss-of-function mechanism. Knockdown of COX20 expression in ND7/23 sensory neuron cells resulted in complex IV deficiency and perturbed assembly of complex IV, which subsequently compromised cell spare respiratory capacity and reduced cell proliferation under metabolic stress. Consistent with mitochondrial dysfunction in knockdown cells, reduced complex IV assembly, enzyme activity and oxygen consumption rate were also found in patients' fibroblasts. We speculated that the mechanism of COX20 was similar to other causative genes (e.g. SURF1, COX6A1, COA3 and SCO2) for peripheral neuropathies, all of which were functionally important in the structure and assembly of complex IV. Our study identifies a novel causative gene for the autosomal recessive sensory neuronopathy, whose vital function in complex IV and high expression in the proprioceptive sensory neuron further underlines loss of COX20 contributing to mitochondrial bioenergetic dysfunction as a mechanism in peripheral sensory neuron disease.
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Affiliation(s)
- Hai-Lin Dong
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China
| | - Yin Ma
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China
| | - Hao Yu
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China
| | - Qiao Wei
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China
| | - Jia-Qi Li
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China
| | - Gong-Lu Liu
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China
| | - Hong-Fu Li
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China
| | - Lei Chen
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China.,Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China
| | - Dian-Fu Chen
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China.,Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China
| | - Ge Bai
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China.,Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China.,NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, China
| | - Zhi-Ying Wu
- Department of Neurology and Research Center of Neurology in Second Affiliated Hospital, Hangzhou, China.,Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China.,NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, China.,CAS Center for Excellence in Brain Science and Intelligence Technology, Shanghai, China
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Yong VTY, Kilfoyle D, Hutchinson D, Rodrigues M, Roxburgh R, Pelosi L. Heterogeneity of nerve ultrasound findings in mitochondrial disorders. Clin Neurophysiol 2021; 132:507-509. [PMID: 33450571 DOI: 10.1016/j.clinph.2020.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 11/18/2022]
Affiliation(s)
- Vivien T Y Yong
- Department of Neurology, Auckland District Health Board, Auckland, New Zealand
| | - Dean Kilfoyle
- Department of Neurology, Auckland District Health Board, Auckland, New Zealand
| | - David Hutchinson
- Department of Neurology, Auckland District Health Board, Auckland, New Zealand
| | - Miriam Rodrigues
- Department of Neurology, Auckland District Health Board, Auckland, New Zealand
| | - Richard Roxburgh
- Department of Neurology, Auckland District Health Board, Auckland, New Zealand
| | - Luciana Pelosi
- Department of Neurology and Clinical Neurophysiology, Bay of Plenty District Health Board, Tauranga, New Zealand.
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