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Worldwide distribution and broader clinical spectrum of muscle-eye-brain disease.

Abstract：

:Muscle-eye-brain disease (MEB), an autosomal recessive disorder prevalent in Finland, is characterized by congenital muscular dystrophy, brain malformation and ocular abnormalities. Since the MEB phenotype overlaps substantially with those of Fukuyama-type congenital muscular dystrophy (FCMD) and Walker-Warburg syndrome (WWS), these three diseases are thought to result from a similar pathomechanism. Recently, we showed that MEB is caused by mutations in the protein O-linked mannose beta1,2-N-acetylglucosaminyltransferase 1 (POMGnT1) gene. We describe here the identification of seven novel disease-causing mutations in six of not only non-Finnish Caucasian but also Japanese and Korean patients with suspected MEB, severe FCMD or WWS. Including six previously reported mutations, the 13 disease-causing mutations we have found thus far are dispersed throughout the entire POMGnT1 gene. We also observed a slight correlation between the location of the mutation and clinical severity in the brain: patients with mutations near the 5' terminus of the POMGnT1 coding region show relatively severe brain symptoms such as hydrocephalus, while patients with mutations near the 3' terminus have milder phenotypes. Our results indicate that MEB may exist in population groups outside of Finland, with a worldwide distribution beyond our expectations, and that the clinical spectrum of MEB is broader than recognized previously. These findings emphasize the importance of considering MEB and searching for POMGnT1 mutations in WWS or other congenital muscular dystrophy patients worldwide.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Taniguchi K,Kobayashi K,Saito K,Yamanouchi H,Ohnuma A,Hayashi YK,Manya H,Jin DK,Lee M,Parano E,Falsaperla R,Pavone P,Van Coster R,Talim B,Steinbrecher A,Straub V,Nishino I,Topaloglu H,Voit T,Endo T,Toda T

doi

10.1093/hmg/ddg043

subject

Has Abstract

pub_date

2003-03-01 00:00:00

pages

527-34

issue

5

eissn

0964-6906

issn

1460-2083

journal_volume

12

pub_type

杂志文章

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