X-linked myotubular myopathy due to a complex rearrangement involving a duplication of MTM1 exon 10

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• 作者：N. Trump^a ; ¹ ; ² ; T. Cullup^a ; ² ; J.B.G.M. Verheij^b ; A. Manzur^c ; F. Muntoni^c ; S. Abbs^a ; H. Jungbluth^d ; ^e ; ^{Heinz.Jungbluth@gstt.nhs.uk}
• 关键词：X-linked myotubular myopathy (XLMTM) ; Myotubularin (MTM1) gene ; Rearrangement ; mRNA ; Duplication
• 刊名：Neuromuscular Disorders
• 出版年：2012
• 期刊代码：203_09608966
• 类别：med
• 出版时间：May, 2012
• 卷：22
• 期：5
• 页码：384-388
• 文件大小：268 K

摘要

X-linked myotubular myopathy is a predominantly severe congenital myopathy with central nuclei on muscle biopsy due to mutations in the m>MTM1m> gene encoding myotubularin. We report a boy with typical features of X-linked myotubular myopathy. Sequencing of the m>MTM1m> gene did not reveal any causative mutations. Subsequent MLPA analysis identified a duplication of m>MTM1m> exon 10 both in the patient and his mother. Additional quantitative fluorescent PCR and long-range PCR revealed an additional large deletion (2536 bp) within intron 10, 143 bp downstream of exon 10, and confirmed the duplication of exon 10. Our findings suggest that complex rearrangements have to be considered in typically affected males with X-linked myotubular myopathy.