Volume 20, Issue 10 pp. 1258-1263
Main Article

Genetic regulation of slowly progressing mild muscle atrophy in fast-twitch muscles of BUF/Mna rats

Hiroyuki Amo PhD

Hiroyuki Amo PhD

Aichi Women's College, Aichi-ken, Japan

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Mitsuhiro Saito BSc

Mitsuhiro Saito BSc

Department of Pathology, Nagoya University School of Medicine, Nagoya, Japan

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Shizuko Nagao PhD

Shizuko Nagao PhD

Laboratory Animal Center, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake-shi, Aichi-ken 470-11, Japan

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Shigeru Yagiu PhD

Shigeru Yagiu PhD

Laboratory Animal Center, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake-shi, Aichi-ken 470-11, Japan

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Hisahide Takahashi PhD

Hisahide Takahashi PhD

Laboratory Animal Center, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake-shi, Aichi-ken 470-11, Japan

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Hiroyuki Morita MD

Hiroyuki Morita MD

Branch Hospital, Nagoya University School of Medicine, Nagoya, Japan

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Takako Matsuyama Morita MD

Takako Matsuyama Morita MD

Second Department of Surgery, Nagoya University School of Medicine, Nagoya, Japan

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Mutsushi Matsuyama MD

Corresponding Author

Mutsushi Matsuyama MD

Department of Pathology, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake-shi, Aichi-ken 470-11, Japan

Department of Pathology, Fujita Health University School of Medicine, 1-98 Dengakugakubo, Kutsukake-cho, Toyoake-shi, Aichi-ken 470-11, JapanSearch for more papers by this author

Abstract

BUF/Mna strain rats spontaneously develop slowly progressing mild-moderate muscle atrophy of extensor digitorum longus, tibialis, and extraocular muscles, which consist mainly of fast-twitch type fibers, at nearly 100% incidence. They have lighter extensor digitorum longus muscles than soleus muscles, when alive for more than 6 weeks. Genetic segregation of the development of the muscle atrophy was studied by crossing the BUF/Mna strain with three other strains, ACI/NMs, WKY/NCrj, and BDIX, which were free of muscle atrophy. Two autosomal dominant susceptible genes, Mas-1 and Mas-2, determine the development of the muscle atrophy in these combinations of crosses. © 1997 John Wiley & Sons, Inc. Muscle Nerve 20: 1258–1263, 1997

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