Hereditary sensory and autonomic neuropathy type I (HSAN I) is an autosomal dominant disorder of the peripheral nervous system characterized by marked progressive sensory loss, with variable autonomic and motor involvement. The HSAN I locus maps to chromosome 9q22.1-22.3 and is caused by mutations in the gene coding for serine palmitoyltransferase long chain base subunit 1 (SPTLC1). Sequencing in HSAN I families have previously identified mutations in exons 5, 6 and 13 of this gene. Here we report the clinical, electrophysiological and pathological findings of a proband in a Chinese family with HSAN I. The affected members showed almost typical clinical features. Electrophysiological findings showed an axonal, predominantly sensory, neuropathy with motor and autonomic involvement. Sural nerve biopsy showed loss of myelinated and unmyelinated fibers. SPTLC1 mutational analysis revealed the C133W mutation, a mutation common in British HSAN I families.
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http://dx.doi.org/10.1111/j.1440-1789.2007.00808.x | DOI Listing |
J Neurol Sci
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Veneto Regional Center Motor Neuron Diseases, Department of Neurosciences, University Hospital of Padova, Italy.
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Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
GJB2 encodes connexin 26 (Cx26), the most commonly mutated gene causing hereditary non-syndromic hearing loss. Cx26 is mainly expressed in supporting cells (SCs) and fibrocytes in the mammalian cochlea. Gene therapy is currently considered the most promising strategy for eradicating genetic diseases.
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Department of Neurology, University of Texas Medical Branch, Galveston, TX 77555, USA.
Background: Hereditary Sensory Motor Neuropathy (HSMN) 1A and Multiple Sclerosis (MS) are distinct demyelinating disorders affecting the peripheral and central nervous systems, respectively. We present a case of simultaneous occurrence of both conditions, exploring the clinical presentation, diagnostic workup, and potential interplay between these diseases. Case presentation and clinical approach: A 49-year-old male with a history of optic neuritis presented with progressive numbness, weakness, and sensory loss in all extremities over four years.
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Clinical Neurophysiology, University Hospital of Wales, Cardiff, GBR.
Charcot-Marie-Tooth disease (CMT) is the most common hereditary peripheral neuropathy. It presents a wide range of genetic and phenotypic heterogeneity. CMT disease type 1A (CMT1A), caused by PMP22 gene duplication, represents the most common subtype of CMT in Western countries.
View Article and Find Full Text PDFJ Hum Genet
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Department of Neurology, General Hospital of Ningxia Medical University, Yinchuan, China.
Hereditary sensory and autonomic neuropathy type 2 (HSAN2) is a group of extremely rare autosomal recessive neurological disorders characterized by predominant sensory dysfunction and attendant severe complications, such as limb destruction. Our study reports a Chinese patient who met the diagnostic criteria for HSAN2 and harbored a homozygous mutation in the WNK1 gene (NM_213655.4: c.
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