scholarly journals Rapid Detection of Duplication/Deletion of thePMP22Gene in Patients with Charcot-Marie-Tooth Disease Type 1A and Hereditary Neuropathy with Liability to Pressure Palsy by Real-time Quantitative PCR using SYBR Green I Dye

2003 ◽  
Vol 18 (5) ◽  
pp. 727 ◽  
Author(s):  
Sang Wun Kim ◽  
Kwang Soo Lee ◽  
Hyun Seok Jin ◽  
Tae Mi Lee ◽  
Soo Kyung Koo ◽  
...  
Keyword(s):  
Real Time ◽  
Quantitative Pcr ◽  
Rapid Detection ◽  
Disease Type ◽  
Hereditary Neuropathy ◽  
Charcot Marie Tooth ◽  
Charcot Marie Tooth Disease ◽  
Real Time Quantitative Pcr ◽  
Pressure Palsy ◽  
Tooth Disease

scholarly journals Prevalence and characterization of pain in patients with Charcot-Marie-Tooth disease type 1A

2021 ◽  
Author(s):  
Helen AZEVEDO ◽  
Henrique COSTA ◽  
Eduardo DAVIDOVICH ◽  
Camila PUPE ◽  
Osvaldo José Moreira NASCIMENTO
Keyword(s):  
Neuropathic Pain ◽  
Clinical Evaluation ◽  
Disease Type ◽  
Moderate Intensity ◽  
Hereditary Neuropathy ◽  
Charcot Marie Tooth ◽  
Clinical Criteria ◽  
Charcot Marie Tooth Disease ◽  
Sf 36 ◽  
Tooth Disease

ABSTRACT Background: Charcot-Marie-Tooth disease type 1A (CMT1A) is the most common form of hereditary neuropathy. Objective: To investigate the prevalence and characteristics of pain in patients with CMT1A. Methods: Nineteen patients with a diagnosis of CMT1A were evaluated between September 2018 and October 2019, and other causes of neuropathy were ruled out. The following tools were used for the pain assessment: neurological assessment, LANSS, DN4, clinical evaluation, VAS, CMTNS2 and SF-36. Statistical analysis was performed using prevalence analysis, t test, chi-square test and Spearman's rho. Results: The prevalence of pain was 84.2% in the sample of this study, with moderate intensity and nociceptive characteristics according to the LANSS scale (75%) and clinical evaluation (50%), but differing from DN4, which found neuropathic pain in the majority of the patients (56.2%). Mixed pain was also observed in 43.7% of the patients, according to clinical criteria. There was a statistically significant correlation between pain intensity and SF-36, thus demonstrating that the lower the pain was, the lower the impairment was, in all domains. Conclusion: Pain is a prevalent and important symptom in CMT1A, with moderate intensity and nociceptive characteristics according to two tools, but neuropathic pain is also present, and there may even be a mixed pattern of pain. The correlation of the pain with SF-36 suggests that pain relief could provide improvements to the quality of life of these individuals.

Quantitative measurement of duplicated DNA as a diagnostic test for Charcot-Marie-Tooth disease type 1a

1993 ◽  
Vol 39 (9) ◽  
pp. 1845-1849 ◽  
Author(s):  
G W Hensels ◽  
E A Janssen ◽  
J E Hoogendijk ◽  
L J Valentijn ◽  
F Baas ◽  
...  
Keyword(s):  
Preliminary Investigation ◽  
Sensory Neuropathy ◽  
Disease Type ◽  
Chromosome 17 ◽  
Hereditary Neuropathy ◽  
Chromosomal Dna ◽  
Gene Encoding ◽  
Charcot Marie Tooth ◽  
Charcot Marie Tooth Disease ◽  
Tooth Disease

Abstract Charcot-Marie-Tooth disease type 1 (CMT1) is a hereditary motor and sensory neuropathy. The autosomal dominant subtype is often linked with a large duplication on chromosome 17p11.2. The gene encoding the peripheral myelin protein PMP 22 (the critical gene in this subtype of CMT1) is located within this duplication. To detect this duplication in chromosomal DNA from individuals thought to have CMT1, we compared the hybridization signals of two DNA probes within this duplication (VAW412R3a and VAW409R3a) with the signal of a reference probe (E3.9). When duplication was present, the signals from the first two probes increased from 100% (for nonduplicated samples) to 145% and 142%, respectively. The day-to-day variance was 3.7% and 5.1%, respectively. We demonstrated this DNA duplication in 49 of 95 DNA samples from unrelated individuals thought to have CMT1. Moreover, because hereditary neuropathy with liability to pressure palsies (HNPP) is based on a DNA deletion in the same area of chromosome 17, this quantitative test may be useful in establishing the presence of HNPP. In a preliminary investigation, four unrelated patients with HNPP yielded test values of 63% and 54%, respectively, of those for nonduplicated samples (CV 19% and 18%, respectively; n = 4), suggesting a deletion in 17p11.2.

scholarly journals Rapid detection of a recombinant hotspot associated with Charcot–Marie–Tooth disease type 1A duplication by a PCR-based DNA test

1998 ◽  
Vol 44 (2) ◽  
pp. 270-274 ◽  
Author(s):  
Jan-Gowth Chang ◽  
Yuh-Jyh Jong ◽  
Wen-Pin Wang ◽  
Jyh-Chwan Wang ◽  
Chaur-Jong Hu ◽  
...  
Keyword(s):  
Rapid Detection ◽  
Disease Type ◽  
Chinese Patients ◽  
Charcot Marie Tooth ◽  
Dna Test ◽  
Charcot Marie Tooth Disease ◽  
Repeat Sequences ◽  
Tooth Disease

Abstract A 1.5-Mb duplication on chromosome 17p11.2-p12 (CMT1A duplication) caused by a misalignment of the CMT1A repeat sequences (CMT1A-REPs) is associated with Charcot–Marie–Tooth disease type 1A (CMT1A). A hotspot of crossover breakpoints located in a 3.2-kb region of the CMT1A-REPs accounts for three-quarters of the rearrangements in CMT1A patients. We developed a PCR-based diagnostic method to detect a recombination hotspot associated with the CMT1A duplication. Thirty-one CMT1A Chinese patients from different families and 50 healthy people over 65 years of age were studied. Twenty-seven of the 31 cases demonstrated the 3.2-kb hotspot crossover, of which there were two subgroups. The type 1 crossover breakpoint was located at the distal CMT1A-REP around the PmeI site, and accounted for 24 of the 27 cases with a 3.2-kb hotspot crossover in CMT1A duplication patients. The type 2 crossover breakpoint was located at the distal CMT1A-REP around the base 3625 region, accounting for 3 of the 27 cases. The results correlated very well with the results of Southern transfer analysis. This study has a potentially important role in the diagnosis of CMT1A disease.

scholarly journals A case of X-linked Charcot-Marie-tooth disease type 1 manifesting as recurrent alternating hemiplegia with transient cerebral white matter lesions

2021 ◽  
Vol 23 (2) ◽  
pp. 130-133
Author(s):  
Minsung Kang ◽  
Sun-Jae Hwang ◽  
Jin-Hong Shin ◽  
Dae-Seong Kim
Keyword(s):  
Nervous System ◽  
Clinical Manifestations ◽  
White Matter Lesions ◽  
Disease Type ◽  
Cerebral White Matter ◽  
Hereditary Neuropathy ◽  
Charcot Marie Tooth ◽  
Charcot Marie Tooth Disease ◽  
Tooth Disease

X-linked Charcot Marie Tooth disease type 1 (CMTX1) is a clinically heterogenous X-linked hereditary neuropathy caused by mutation of the gene encoding gap junction beta 1 protein (GJB1). Typical clinical manifestations of CMTX1 are progressive weakness or sensory disturbance due to peripheral neuropathy. However, there have been some CMTX1 cases with accompanying central nervous system (CNS) manifestations. We report the case of a genetically confirmed CMTX1 patient who presented recurrent transient CNS symptoms without any symptom or sign of peripheral nervous system involvement.

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