Volume 67, Issue 5 pp. 437-444
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Strong linkage disequilibrium and haplotype analysis in Japanese pedigrees with Machado-Joseph disease

Kotaro Endo

Kotaro Endo

Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan

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Hidenao Sasaki

Hidenao Sasaki

Department of Neurology, National Sanatorium West-Niigata Central Hospital, Niigata, Japan

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Akemi Wakisaka

Akemi Wakisaka

Department of Neurology and Department of Pathology, Hokkaido University School of Medicine, Sapporo, Hokkaido, Japan

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Hajime Tanaka

Hajime Tanaka

Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan

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Masaaki Saito

Masaaki Saito

Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan

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Shuichi Igarashi

Shuichi Igarashi

Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan

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Yoshihisa Takiyama

Yoshihisa Takiyama

Department of Neurology, Jichi Medical School, Minamikawachi, Tochigi, Japan

Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan

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Kazuhiro Sanpei

Kazuhiro Sanpei

Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan

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Kiyoshi Iwabuchi

Kiyoshi Iwabuchi

Department of Neurology and Psychiatry, Kanagawa Rehabilitation Center, Atsugi, Kanagawa, Japan

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Yoshihiro Suzuki

Yoshihiro Suzuki

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

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Keiko Onari

Keiko Onari

Department of Neurology, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan

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Tomokazu Suzuki

Tomokazu Suzuki

Department of Clinical Genetics, Kyushu University, Beppu, Fukuoka, Japan

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Jean Weissenbach

Jean Weissenbach

Genethon, Evry, Unité de Génétique Moléculaire Humain, CNRS URA 1445, Institut Pasteur, Paris, France

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James L. Weber

James L. Weber

Marshfield Medical Research Foundation, Marshfield, Wisconsin

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Yoshiko Nomura

Yoshiko Nomura

Segawa Neurological Clinic for Children, Chiyoda-ku, Tokyo, Japan

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Masaya Segawa

Masaya Segawa

Segawa Neurological Clinic for Children, Chiyoda-ku, Tokyo, Japan

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Masatoyo Nishizawa

Masatoyo Nishizawa

Department of Neurology, Jichi Medical School, Minamikawachi, Tochigi, Japan

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Shoji Tsuji

Corresponding Author

Shoji Tsuji

Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, Niigata, Japan

Department of Neurology, Clinical Neuroscience Branch, Brain Research Institute, Niigata University, 1 Asahimachi, Niigata 951, JapanSearch for more papers by this author

Abstract

To identify the markers tightly linked to Machado-Joseph disease (MJD) and to investigate whether a limited number of ancestral chromosomes are shared by Japanese MJD pedigrees, a detailed linkage analysis employing D14S55, D14S48, D14S67, D14S291, D14S280, AFM343vf1, D14S81, D14S265, D14S62, and D14S65 was performed. The results of multipoint linkage analysis as well as detection of critical recombination events indicate that the gene for MJD is localized in a 4-cM region between D14S280-D14S81. We found strong linkage disequilibria at AFM343vf1 and D14S81, and association of a few common haplotypes with MJD. These results indicate that there is an obvious founder effect in Japanese MJD and suggest the possibility of the existence of predisposing haplotypes which are prone to expansions of CAG repeats. © 1996 Wiley-Liss, Inc.

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