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Duplication of part of chromosome 17 is commonly associated with hereditary motor and sensory neuropathy type I (Charcot-Marie-Tooth disease type 1).
Ann Neurol. 1992 May; 31(5):570-2.AN

Abstract

Hereditary motor and sensory neuropathy type I (HMSNI), also known as Charcot-Marie-Tooth disease type 1 (CMT1), has been shown to be genetically heterogeneous. A major gene maps to chromosome 17 (CMT1A). A set of loci, D17S122, D17S125, and D17S124, show tight linkage to the CMT1A locus, and a duplication of D17S122 has been detected in some families. We show that the locus D17S122 is duplicated in affected individuals from 7 informative families with HMSNI. The duplication was demonstrated either by differences in hybridization densities between two bands of a restriction fragment length polymorphism or by the presence of all three alleles. No normal individual had the duplication. A single recombinant exists between the MspI polymorphism of D17S122 and the duplicated band, suggesting that the duplication is of considerable size. Patients with HMSN type II do not show the duplication. These findings will have considerable impact on the diagnosis of chronic demyelinating neuropathies, in patients with or without similarly affected relatives.

Authors+Show Affiliations

Molecular Genetics Unit, Institute of Child Health, London, England.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

1596093

Citation

Hallam, P J., et al. "Duplication of Part of Chromosome 17 Is Commonly Associated With Hereditary Motor and Sensory Neuropathy Type I (Charcot-Marie-Tooth Disease Type 1)." Annals of Neurology, vol. 31, no. 5, 1992, pp. 570-2.
Hallam PJ, Harding AE, Berciano J, et al. Duplication of part of chromosome 17 is commonly associated with hereditary motor and sensory neuropathy type I (Charcot-Marie-Tooth disease type 1). Ann Neurol. 1992;31(5):570-2.
Hallam, P. J., Harding, A. E., Berciano, J., Barker, D. F., & Malcolm, S. (1992). Duplication of part of chromosome 17 is commonly associated with hereditary motor and sensory neuropathy type I (Charcot-Marie-Tooth disease type 1). Annals of Neurology, 31(5), 570-2.
Hallam PJ, et al. Duplication of Part of Chromosome 17 Is Commonly Associated With Hereditary Motor and Sensory Neuropathy Type I (Charcot-Marie-Tooth Disease Type 1). Ann Neurol. 1992;31(5):570-2. PubMed PMID: 1596093.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Duplication of part of chromosome 17 is commonly associated with hereditary motor and sensory neuropathy type I (Charcot-Marie-Tooth disease type 1). AU - Hallam,P J, AU - Harding,A E, AU - Berciano,J, AU - Barker,D F, AU - Malcolm,S, PY - 1992/5/1/pubmed PY - 1992/5/1/medline PY - 1992/5/1/entrez SP - 570 EP - 2 JF - Annals of neurology JO - Ann Neurol VL - 31 IS - 5 N2 - Hereditary motor and sensory neuropathy type I (HMSNI), also known as Charcot-Marie-Tooth disease type 1 (CMT1), has been shown to be genetically heterogeneous. A major gene maps to chromosome 17 (CMT1A). A set of loci, D17S122, D17S125, and D17S124, show tight linkage to the CMT1A locus, and a duplication of D17S122 has been detected in some families. We show that the locus D17S122 is duplicated in affected individuals from 7 informative families with HMSNI. The duplication was demonstrated either by differences in hybridization densities between two bands of a restriction fragment length polymorphism or by the presence of all three alleles. No normal individual had the duplication. A single recombinant exists between the MspI polymorphism of D17S122 and the duplicated band, suggesting that the duplication is of considerable size. Patients with HMSN type II do not show the duplication. These findings will have considerable impact on the diagnosis of chronic demyelinating neuropathies, in patients with or without similarly affected relatives. SN - 0364-5134 UR - https://www.unboundmedicine.com/medline/citation/1596093/Duplication_of_part_of_chromosome_17_is_commonly_associated_with_hereditary_motor_and_sensory_neuropathy_type_I__Charcot_Marie_Tooth_disease_type_1__ L2 - https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0364-5134&date=1992&volume=31&issue=5&spage=570 DB - PRIME DP - Unbound Medicine ER -