Clinical features and a mutation with late onset of limb girdle muscular dystrophy 2B

Toshiaki Takahashi, Masashi Aoki, Naoki Suzuki, Maki Tateyama, Chikako Yaginuma, Hitomi Sato, Miho Hayasaka, Hitomi Sugawara, Mariko Ito, Emi Abe-Kondo, Naoko Shimakura, Tohru Ibi, Satoshi Kuru, Tadashi Wakayama, Gen Sobue, Naoki Fujii, Toshio Saito, Tsuyoshi Matsumura, Itaru Funakawa, Eiichiro MukaiToru Kawanami, Mitsuya Morita, Mineo Yamazaki, Takashi Hasegawa, Jun Shimizu, Shoji Tsuji, Shigeki Kuzuhara, Hiroyasu Tanaka, Masaru Yoshioka, Hidehiko Konno, Hiroshi Onodera, Yasuto Itoyam

研究成果: Article査読

37 被引用数 (Scopus)

抄録

Objective and methods: Dysferlin encoded by DYSF deficiency leads to two main phenotypes, limb girdle muscular dystrophy (LGMD) 2B and Miyoshi myopathy. To reveal in detail the mutational and clinical features of LGMD2B in Japan, we observed 40 Japanese patients in 36 families with LGMD2B in whom dysferlin mutations were confirmed. Results and conclusions: Three mutations (c.1566C>G, c.2997G>T and c.4497delT) were relatively more prevalent. The c.2997G>T mutation was associated with late onset, proximal dominant forms of dysferlinopathy, a high probability that muscle weakness started in an upper limb and lower serum creatine kinase (CK) levels. The clinical features of LGMD2B are as follows: (1) onset in the late teens or early adulthood, except patients homozygous for the c.2997G>T mutation; (2) lower limb weakness at onset; (3) distal change of lower limbs on muscle CT at an early stage; (4) impairment of lumbar erector spinal muscles on muscle CT at an early stage; (5) predominant involvement of proximal upper limbs; (6) preservation of function of the hands at late stage; (7) preservation of strength in neck muscles at late stage; (8) lack of facial weakness or dysphagia; (9) avoidance of scoliosis; (10) hyper-Ckaemia; (11) preservation of cardiac function; and (12) a tendency for respiratory function to decline with disease duration. It is important that the late onset phenotype is found with prevalent mutations.

本文言語English
ページ(範囲)433-439
ページ数7
ジャーナルJournal of Neurology, Neurosurgery and Psychiatry
84
4
DOI
出版ステータスPublished - 2013 4

ASJC Scopus subject areas

  • 外科
  • 臨床神経学
  • 精神医学および精神衛生

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