Volume 80, Issue 4 pp. 352-355
Research Article
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Four novel mutations of the connexin 32 gene in four Japanese families with Charcot-Marie-Tooth disease type 1

Tohru Ikegami

Tohru Ikegami

Department of Pediatrics, Yamagata University School of Medicine, Yamagata, Japan

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Changqing Lin

Changqing Lin

Department of Pediatrics, Yamagata University School of Medicine, Yamagata, Japan

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Mitsuhiro Kato

Mitsuhiro Kato

Department of Pediatrics, Yamagata University School of Medicine, Yamagata, Japan

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Aiko Itoh

Aiko Itoh

Department of Pediatrics, Yamagata University School of Medicine, Yamagata, Japan

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Ikuya Nonaka

Ikuya Nonaka

Division of Ultrastructural Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan

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Masayuki Kurimura

Masayuki Kurimura

Third Department of Internal Medicine, Yamagata University School of Medicine, Yamagata, Japan

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Hisayuki Hirayabashi

Hisayuki Hirayabashi

Department of Neurology, Tokai University School of Medicine, Kanagawa, Japan

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Yukito Shinohara

Yukito Shinohara

Department of Neurology, Tokai University School of Medicine, Kanagawa, Japan

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Atsuko Mochizuki

Atsuko Mochizuki

Department of Neurology, Teikyo University School of Medicine, Tokyo, Japan

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Kiyoshi Hayasaka

Corresponding Author

Kiyoshi Hayasaka

Department of Pediatrics, Yamagata University School of Medicine, Yamagata, Japan

Kiyoshi Hayasaka, M.D., Department of Pediatrics, Yamagata University School of Medicine, Iidanishi 2-2-2, Yamagata 990-9585, JapanSearch for more papers by this author

Abstract

DNA-based mutation analysis on the connexin 32 gene was performed in 49 families with Charcot-Marie-Tooth disease (CMT) type 1 but without duplication involving the chromosomal region, 17p12-p11.2. Mutations were identified in five of the 49 families, and four of the five mutations were hitherto undescribed: Val37Met, Glu57His, Arg142Glu, Val177Ala. X-linked CMT sometimes lacks evidence for X-linked transmission and cannot be differentiated from CMT type 2, especially in females with mildly decreased nerve conduction velocity. Therefore, molecular analysis is useful for molecular pathology of their disease. Am. J. Med. Genet. 80:352–355, 1998. © 1998 Wiley-Liss, Inc.

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