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Gap junction protein beta 1 (GJB1) mutations and central nervous system symptoms in X-linked Charcot-Marie-Tooth disease.

Abstract：

OBJECTIVES:To clarify the clinical variability, including central nervous system (CNS) involvement, in X-linked Charcot-Marie-Tooth disease (CMTX) patients. MATERIAL AND METHODS:We clinically, pathologically and genetically studied six CMTX patients with distinct symptoms and four different GJB1 mutations. RESULTS:One patient with Val63Ile had deafness, low intelligence, saccadic eye movement, upper extremity distal dominant muscle weakness and normal sensation. Another patient with Glu186Lys had severe sensorineural deafness at the age of 6 years, but did not develop muscle weakness until the age of 20 years. Two patients with Arg22Gln had typical CMT1A-like clinical features, no CNS symptoms and obvious onion bulb formations. Two siblings with deletion of the entire GJB1 gene had mild to moderate lower extremity muscle weakness and sensory disturbance without CNS involvement. CONCLUSION:These findings suggest that some gain of function mutations of GJB1 may be related to CNS symptoms because the patients with GJB1 deletion only had peripheral neuropathy, although other unknown associated factors may contribute to their clinical phenotypes.

journal_name

Acta Neurol Scand

journal_title

Acta neurologica Scandinavica

authors

Takashima H,Nakagawa M,Umehara F,Hirata K,Suehara M,Mayumi H,Yoshishige K,Matsuyama W,Saito M,Jonosono M,Arimura K,Osame M

doi

10.1034/j.1600-0404.2003.01317.x

subject

Has Abstract

pub_date

2003-01-01 00:00:00

pages

31-7

issue

1

eissn

0001-6314

issn

1600-0404

pii

1o317

journal_volume

107

pub_type

杂志文章

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