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Facial Onset Sensory and Motor Neuronopathy-Like Syndrome: A Case Report. J Clin Neuromuscul Dis 2022; 24:55-58. [PMID: 36005474 DOI: 10.1097/cnd.0000000000000402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Facial onset sensory and motor neuronopathy syndrome (FOSMN) is a rare motor neuron disorder characterized by facial sensory and motor aberrations that progress to the upper limbs. We present a case of FOSMN-like syndrome that has characteristics of FOSMN but is confined to the craniofacial region. METHODS Retrospective chart review and review of the literature. RESULTS A 70-year-old woman presented with a 1-month history of progressive bilateral facial sensory loss and weakness affecting the trigeminal and hypoglossal nerves. Within 12 months, she developed debilitating weakness affecting her lower and midface bilaterally. After an extensive workup, a diagnosis of FOSMN-like syndrome was made, as symptoms failed to progress to the upper extremities. CONCLUSIONS This case demonstrates a unique presentation of FOSMN that we classify as FOSMN-like syndrome. Clinicians must maintain a high index of suspicion when a patient presents with clinical features characteristic of FOSMN syndrome without progression of symptoms distal to the craniofacial region because it may represent a FOSMN-like syndrome.
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Liu Y, Luo J, Xiao F. Facial Numbness, Dysarthria, Muscle Atrophy, and Weakness in a Young Patient. JAMA Neurol 2021; 78:1273-1274. [PMID: 34251399 DOI: 10.1001/jamaneurol.2021.2136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yan Liu
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing, China
| | - Jing Luo
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing, China
| | - Fei Xiao
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurology, Chongqing, China
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Mercan M, Yayla V, Altinay S, Seyhan S. Peripheral neuropathy in Tangier disease: A literature review and assessment. J Peripher Nerv Syst 2018; 23:88-98. [PMID: 29582519 DOI: 10.1111/jns.12265] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/15/2018] [Accepted: 03/23/2018] [Indexed: 11/29/2022]
Abstract
Tangier disease (TD) (OMIM#205400) is a rare cause of inherited metabolic neuropathies characterized by marked deficiency of high-density lipoproteins and accumulation of cholesterol esters in various tissue resulting from reverse cholesterol transport deficiency. We report a case of a patient with TD with multifocal demyelinating neuropathy with conduction block who presents with winging scapula, tongue, and asymmetric extremity weakness. We also present a review of all studies published from 1960 to 2017 regarding peripheral neuropathy in TD. Our search identified 54 patients with TD with peripheral neuropathy. Syringomyelia-like neuropathy subtype (52.4%) was more frequent than multifocal sensorial and motor neuropathy subtype (26.2%), focal neuropathy subtype (19.1%), and distal symmetric polyneuropathy subtype (2.4%). Splenomegaly was the most common (40.7%) clinical manifestation in these patients. The pattern of electrodiagnostic abnormalities are: (1) demyelinating abnormalities were more predominant in the upper extremities than in the lower extremities and (2) slowing of motor nerve conduction was more prominent in the intermediate segment than in distal nerve segments. The sural-sparing pattern was present in 34.6% and conduction block was present in 11.5% of the patients. Our literature review and our case showed the clinical spectrum of TD neuropathy is quite wide and that it should be considered in the differential diagnosis of non-uniform demyelinating neuropathies.
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Affiliation(s)
- Metin Mercan
- Department of Neurology, Bakirkoy Dr. Sadi Konuk Research and Training Hospital, Istanbul, Turkey
| | - Vildan Yayla
- Department of Neurology, Bakirkoy Dr. Sadi Konuk Research and Training Hospital, Istanbul, Turkey
| | - Serdar Altinay
- Department of Pathology, Bakirkoy Dr. Sadi Konuk Research and Training Hospital, Istanbul, Turkey
| | - Serhat Seyhan
- Department of Molecular Medicine, Bakirkoy Dr. Sadi Konuk Research and Training Hospital, Istanbul, Turkey
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Liao H, Wan S, Zhang X, Shi D, Zhu X, Chen X. Intermedin Ameliorates Atherosclerosis by Increasing Cholesterol Efflux Through the cAMP-PKA Pathway in Macrophage RAW264.7 Cell Line. Med Sci Monit 2017; 23:5462-5471. [PMID: 29146892 PMCID: PMC5702107 DOI: 10.12659/msm.907298] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Background The aim of this study was to explore the role of intermedin and its mechanism in cholesterol efflux of macrophage THP-1 and RAW264.7 cell lines in atherosclerosis (AS). Material/Methods ApoE−/− mice were fed with a high-fat diet, and the concentrations of total cholesterol (TC), triglyceride (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C) were measured. The lipidoses of the aortic sinus were analyzed by hematoxylin and eosin staining, and the cAMP level was detected by enzyme-linked immunosorbent assay (ELISA). The expressions of ATP-binding cassette transporter (ABCA1) were tested by real-time PCR and Western blot analysis. Results IMD decreased serum TC and LDL-C, and increased serum HDL-C level in apoE−/− mice and attenuated AS plaque areas. In vitro, IMD increased intracellular cAMP concentration in a dose-dependent manner in THP-1 and RAW264.7 cell lines, which enhanced the expression of ABCA1 and increased cholesterol efflux rate. However, this effect was inhibited by PKAI in the RAW 264.7 cell line but not in the THP-1 cell line. Conclusions IMD can ameliorate the development of AS in ApoE−/− mice and regulate cholesterol balance in the RAW264.7 cell line through the cAMP-PKA pathway.
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Affiliation(s)
- Hang Liao
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Shixi Wan
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Xin Zhang
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Di Shi
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Xiaojiang Zhu
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
| | - Xiaoping Chen
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu, Sichuan, China (mainland)
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Ceccanti M, Cambieri C, Frasca V, Onesti E, Biasiotta A, Giordano C, Bruno SM, Testino G, Lucarelli M, Arca M, Inghilleri M. A Novel Mutation in ABCA1 Gene Causing Tangier Disease in an Italian Family with Uncommon Neurological Presentation. Front Neurol 2016; 7:185. [PMID: 27853448 PMCID: PMC5089975 DOI: 10.3389/fneur.2016.00185] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 10/11/2016] [Indexed: 02/02/2023] Open
Abstract
Tangier disease is an autosomal recessive disorder characterized by severe reduction in high-density lipoprotein cholesterol and peripheral lipid storage. We describe a family with c.5094C > A p.Tyr1698* mutation in the ABCA1 gene, clinically characterized by syringomyelic-like anesthesia, demyelinating multineuropathy, and reduction in intraepidermal small fibers innervation. In the proband patient, cardiac involvement determined a myocardial infarction; lipid storage was demonstrated in gut, cornea, and aortic wall. The reported ABCA1 mutation has never been described before in a Tangier family.
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Affiliation(s)
- Marco Ceccanti
- Department of Neurology and Psychiatry, Sapienza University , Rome , Italy
| | - Chiara Cambieri
- Department of Radiological, Oncological and Anatomo-Pathological Sciences, Sapienza University , Rome , Italy
| | - Vittorio Frasca
- Department of Neurology and Psychiatry, Sapienza University , Rome , Italy
| | - Emanuela Onesti
- Department of Neurology and Psychiatry, Sapienza University , Rome , Italy
| | - Antonella Biasiotta
- Department of Radiological, Oncological and Anatomo-Pathological Sciences, Sapienza University , Rome , Italy
| | - Carla Giordano
- Department of Radiological, Oncological and Anatomo-Pathological Sciences, Sapienza University , Rome , Italy
| | - Sabina M Bruno
- Department of Cellular Biotechnologies and Hematology, Sapienza University , Rome , Italy
| | - Giancarlo Testino
- Department of Cellular Biotechnologies and Hematology, Sapienza University , Rome , Italy
| | - Marco Lucarelli
- Department of Cellular Biotechnologies and Hematology, Sapienza University, Rome, Italy; Pasteur Institute, Cenci Bolognetti Foundation, Sapienza University, Rome, Italy
| | - Marcello Arca
- Department of Internal Medicine and Medical Specialties, Sapienza University , Rome , Italy
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Facial onset sensory and motor neuronopathy. Neurol Sci 2016; 37:1905-1909. [DOI: 10.1007/s10072-016-2686-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 07/26/2016] [Indexed: 12/14/2022]
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7
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Nagappa M, Taly AB, Mahadevan A, Pooja M, Bindu PS, Chickabasaviah YT, Gayathri N, Sinha S. An uncommon cause of bifacial weakness and non-length-dependent demyelinating neuropathy. Ann Indian Acad Neurol 2015; 18:445-8. [PMID: 26713019 PMCID: PMC4683886 DOI: 10.4103/0972-2327.169641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Tangier disease is a rare metabolic disorder that causes neuropathy in half of the affected individuals. We present the clinical, electrophysiological, and histopathological findings in a middle-aged gentleman of Tangier disease who was initially diagnosed as leprosy and treated with antileprosy drugs. The presence of a demyelinating electrophysiology in a patient with predominant upper limb involvement and facial diplegia should raise the suspicion of Tangier disease. Estimation of serum lipids should form a part of routine evaluation in order to avoid misdiagnosis.
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Affiliation(s)
- Madhu Nagappa
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Arun B Taly
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Anita Mahadevan
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Mailankody Pooja
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Parayil Sankaran Bindu
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Yasha T Chickabasaviah
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Narayanappa Gayathri
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
| | - Sanjib Sinha
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India
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8
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Brunham LR, Hayden MR. Human genetics of HDL: Insight into particle metabolism and function. Prog Lipid Res 2015; 58:14-25. [DOI: 10.1016/j.plipres.2015.01.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 12/22/2014] [Accepted: 01/07/2015] [Indexed: 10/24/2022]
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Zyss J, Béhin A, Couvert P, Bouhour F, Sassolas A, Kolev I, Denys V, Vial C, Lacour A, Carrié A, Stojkovic T. Clinical and electrophysiological characteristics of neuropathy associated with Tangier disease. J Neurol 2011; 259:1222-6. [DOI: 10.1007/s00415-011-6340-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Revised: 11/23/2011] [Accepted: 11/24/2011] [Indexed: 01/23/2023]
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Fluchere F, Verschueren A, Cintas P, Franques J, Serratrice J, Weiller PJ, Azulay JP, Pouget J, Attarian S. Clinical features and follow-up of four new cases of facial-onset sensory and motor neuronopathy. Muscle Nerve 2010; 43:136-40. [DOI: 10.1002/mus.21884] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Tamehiro N, Zhou S, Okuhira K, Benita Y, Brown CE, Zhuang DZ, Latz E, Hornemann T, von Eckardstein A, Xavier RJ, Freeman MW, Fitzgerald ML. SPTLC1 binds ABCA1 to negatively regulate trafficking and cholesterol efflux activity of the transporter. Biochemistry 2008; 47:6138-47. [PMID: 18484747 DOI: 10.1021/bi800182t] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
ABCA1 transport of cholesterol and phospholipids to nascent HDL particles plays a central role in lipoprotein metabolism and macrophage cholesterol homeostasis. ABCA1 activity is regulated both at the transcriptional level and at the post-translational level. To explore mechanisms involved in the post-translational regulation of the transporter, we have used affinity purification and mass spectrometry to identify proteins that bind ABCA1 and influence its activity. Previously, we demonstrated that an interaction between beta1-syntrophin stimulated ABCA1 activity, at least in part, be slowing the degradation of the transporter. This work demonstrates that one subunit of the serine palmitoyltransferase enzyme, SPTLC1, but not subunit 2 (SPTLC2), is copurified with ABCA1 and negatively regulates its function. In human THP-I macrophages and in mouse liver, the ABCA1-SPTLC1 complex was detected by co-immunoprecipitation, demonstrating that the interaction occurs in cellular settings where ABCA1 activity is critical for HDL genesis. Pharmacologic inhibition of SPTLC1 with myriocin, which resulted in the disruption of the SPTLC1-ABCA1 complex, and siRNA knockdown of SPTLC1 expression both stimulated ABCA1 efflux by nearly 60% ( p < 0.05). In contrast, dominant-negative mutants of SPTLC1 inhibited ABCA1 efflux, indicating that a reduced level of sphingomyelin synthesis could not explain the effect of myriocin on ABCA1 activity. In 293 cells, the SPTLC1 inhibition of ABCA1 activity led to the blockade of the exit of ABCA1 from the endoplasmic reticulum. In contrast, myriocin treatment of macrophages increased the level of cell surface ABCA1. In composite, these results indicate that the physical interaction of ABCA1 and SPTLC1 results in reduction of ABCA1 activity and that inhibition of this interaction produces enhanced cholesterol efflux.
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Affiliation(s)
- Norimasa Tamehiro
- Lipid Metabolism Unit and Center for Computational and Integrative Biology, Massachusetts General Hospital, Harvard Medical School, 185 Cambridge Street, Boston, Massachusetts 02114, USA
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12
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Dystrophin and utrophin isoforms are expressed in glia, but not neurons, of the avian parasympathetic ciliary ganglion. Brain Res 2008; 1218:21-34. [PMID: 18533135 DOI: 10.1016/j.brainres.2008.04.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2008] [Revised: 04/14/2008] [Accepted: 04/20/2008] [Indexed: 11/22/2022]
Abstract
Muscular dystrophy patients often show cognitive impairment, in addition to muscle degeneration caused by dystrophin gene defects. The cognitive impairments lead to speculation that the dystrophin protein family may play a key role at neuronal synapses. Dystrophin regulates the stability of selected GABA(A) receptor subtypes and alpha3-containing nicotinic acetylcholine receptors (nAChRs) at a subset of central GABAergic and peripheral sympathetic nicotinic neuron synapses. Similarly, utrophin, the autosomal homologue of dystrophin, is not required for clustering but indirectly stabilizes muscle-type nAChRs at the neuromuscular junction. We examined dystrophin and utrophin expression and localization in the avian parasympathetic ciliary ganglion (CG) to determine whether these proteins play a general role at neuronal nicotinic synapses. We have determined that full-length utrophin and dystrophin and the short dystrophin isoform Dp116 are the major isoforms expressed in the CG based on immunoblotting and immunolabeling. Unexpectedly, the cytoskeletal proteins were not detected at nicotinic synapses or in CG neurons. They are expressed in myelinating and non-myelinating Schwann cells. Further, utrophin expression developmentally precedes that of dystrophin. The proteins show partially overlapping distributions, but also differential accumulation along the surface membrane of Schwann cells adjacent to neuronal somata versus axonal processes. Our findings are consistent with reports that dystrophin protein family members function in the maintenance of cell-cell interactions and myelination by anchoring the Schwann cell surface membrane to the basal lamina. In contrast, our results differ from those in skeletal muscle and a subset of sympathetic neurons where utrophin and dystrophin localize at nicotinic synapses.
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Albrecht DE, Sherman DL, Brophy PJ, Froehner SC. The ABCA1 cholesterol transporter associates with one of two distinct dystrophin-based scaffolds in Schwann cells. Glia 2008; 56:611-8. [PMID: 18286648 PMCID: PMC4335170 DOI: 10.1002/glia.20636] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cytoskeletal scaffolding complexes help organize specialized membrane domains with unique functions on the surface of cells. In this study, we define the scaffolding potential of the Schwann cell dystrophin glycoprotein complex (DGC) by establishing the presence of four syntrophin isoforms, (alpha1, beta1, beta2, and gamma2), and one dystrobrevin isoform, (alpha-dystrobrevin-1), in the abaxonal membrane. Furthermore, we demonstrate the existence of two separate DGCs in Schwann cells that divide the abaxonal membrane into spatially distinct domains, the DRP2/periaxin rich plaques and the Cajal bands that contain Dp116, utrophin, alpha-dystrobrevin-1 and four syntrophin isoforms. Finally, we show that the two different DGCs can scaffold unique accessory molecules in distinct areas of the Schwann cell membrane. Specifically, the cholesterol transporter ABCA1, associates with the Dp116/syntrophin complex in Cajal bands and is excluded from the DRP2/periaxin rich plaques.
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Affiliation(s)
- Douglas E Albrecht
- Department of Physiology and Biophysics, University of Washington, 1959 NE Pacific St, Box 357290, Seattle WA 98195-7290, USA
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Sedel F, Barnerias C, Dubourg O, Desguerres I, Lyon-Caen O, Saudubray JM. Peripheral neuropathy and inborn errors of metabolism in adults. J Inherit Metab Dis 2007; 30:642-53. [PMID: 17879144 DOI: 10.1007/s10545-007-0684-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2007] [Revised: 07/09/2007] [Accepted: 07/11/2007] [Indexed: 01/14/2023]
Abstract
Although they are classically viewed as paediatric diseases, it is now recognized that inborn errors of metabolism (IEMs) can present at any age from childhood to adulthood. IEMs can involve the peripheral nervous system, mostly as part of a more diffuse neurological or systemic clinical picture. However, in some cases, the neuropathy can be the unique initial sign. Here, based on our personal experience and on a comprehensive literature analysis, we review IEMs causing neuropathies in adults. Diseases were classified according to the predominant type of neuropathies into (1) acute neuropathies, (2) mononeuropathy multiplex, (3) chronic axonal polyneuropathies, (4) chronic demyelinating polyneuropathies, (5) small-fibre neuropathies, and (6) lower motor neuron disease.
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Affiliation(s)
- F Sedel
- Federation of Nervous System Diseases, Salpêtrière Hospital, 47 Boulevard de l'Hôpital, 75651, Paris cedex 13, France.
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Schröder JM. Neuropathology of Charcot-Marie-Tooth and related disorders. Neuromolecular Med 2006; 8:23-42. [PMID: 16775365 DOI: 10.1385/nmm:8:1-2:23] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2005] [Revised: 11/18/2005] [Accepted: 11/30/2005] [Indexed: 11/11/2022]
Abstract
The peripheral nervous system (PNS), with all its branches and connections, is so complex that it is impossible to study all components at the light or electron microscopic level in any individual case; nevertheless, in certain diseases a simple nerve biopsy may suffice to arrive at a precise diagnosis. Structural changes of the PNS in neuropathies of the Charcot-Marie-Tooth (CMT) type and related disorders comprise various components of the PNS. These include peripheral motor, sensory, and autonomous neurons with their axons, Schwann cells, and myelin sheaths in the radicular and peripheral nerves as well as satellite cells in spinal and autonomous ganglia. Astrocytes, oligodendroglial cells, and microglial cells around motor neurons in the anterior horn and around sensory neurons in other areas of the spinal cord are also involved. In addition, connective tissue elements such as endoneurial, perineurial, and epineurial components including blood and lymph vessels play an important role. This review focuses on the cellular components and organelles involved, that is, myelin sheaths, axons with their micro-tubules and neurofilaments; nuclei, mitochondria, endoplasmic reticulum, and connective tissue including the perineurium and blood vessels. A major role is attributed to recent progress in the pathomorphology of various types of CMT1, 2,4, CMTX, and HMNSL, based on light and electron microscopic findings, morphometry, teased fiber studies, and new immunohisto-chemical results such as staining of certain periaxin domains in CMT4F.
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Affiliation(s)
- J Michael Schröder
- Department of Neuropathology, University Hospital, RWTH Aachen, Germany.
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Ginsberg L. Chapter 42 Specific painful neuropathies. HANDBOOK OF CLINICAL NEUROLOGY 2006; 81:635-652. [PMID: 18808864 DOI: 10.1016/s0072-9752(06)80046-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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Abstract
Sensory neuron diseases (SND) are a distinct subgroup of peripheral-nervous-system diseases, first acknowledged in 1948. Acquired SND have a subacute or chronic course and are associated with systemic immune-mediated diseases, vitamin intoxication or deficiency, neurotoxic drugs, and life-threatening diseases such as cancer. SND are commonly idiopathic but can be genetic diseases; the latter tend to involve subtypes of sensory neurons and are associated with certain clinical pictures. The loss of sensory neurons in dorsal root ganglia causes the degeneration of short and long peripheral axons and central sensory projections in the posterior columns. This pathological process leads to a pattern of sensory nerve degeneration that is not length dependent and explains distinct clinical and neurophysiological abnormalities. Here we propose a comprehensive approach to the diagnosis of acquired and hereditary SND and discuss clinical, genetic, neurophysiological, neuroradiological, and neuropathological assessments.
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Affiliation(s)
- Angelo Sghirlanzoni
- Neuro-Oncology Unit, National Neurological Institute Carlo Besta, Milan, Italy
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Greenberg SA, Walsh RJ. Molecular diagnosis of inheritable neuromuscular disorders. Part II: Application of genetic testing in neuromuscular disease. Muscle Nerve 2005; 31:431-51. [PMID: 15704143 DOI: 10.1002/mus.20279] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Molecular genetic advances have led to refinements in the classification of inherited neuromuscular disease, and to methods of molecular testing useful for diagnosis and management of selected patients. Testing should be performed as targeted studies, sometimes sequentially, but not as wasteful panels of multiple genetic tests performed simultaneously. Accurate diagnosis through molecular testing is available for the vast majority of patients with inherited neuropathies, resulting from mutations in three genes (PMP22, MPZ, and GJB1); the most common types of muscular dystrophies (Duchenne and Becker, facioscapulohumeral, and myotonic dystrophies); the inherited motor neuron disorders (spinal muscular atrophy, Kennedy's disease, and SOD1 related amyotrophic lateral sclerosis); and many other neuromuscular disorders. The role of potential multiple genetic influences on the development of acquired neuromuscular diseases is an increasingly active area of research.
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Affiliation(s)
- Steven A Greenberg
- Department of Neurology, Division of Neuromuscular Disease, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, Massachusetts 02115, USA.
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