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Gene locus for autosomal recessive distal myopathy with rimmed vacuoles maps to chromosome 9
Author(s) -
Ikeuchi Takeshi,
Asaka Tomoya,
Saito Masaaki,
Tanaka Hajime,
Higuchi Sari,
Tanaka Keiko,
Saida Kyoko,
Uyama Eiichiro,
Mizusawa Hidenobu,
Fukuhara Nobuyoshi,
aka Ikuya,
Takamori Masaharu,
Tsuji Shoji
Publication year - 1997
Publication title -
annals of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.764
H-Index - 296
eISSN - 1531-8249
pISSN - 0364-5134
DOI - 10.1002/ana.410410405
Subject(s) - myopathy , locus (genetics) , genetics , genetic linkage , biology , gene
Distal myopathy with rimmed vacuoles is an autosomal recessive muscular disorder, characterized clinically by weakness of the distal muscles in the lower limbs in early adulthood. Recently, the gene locus for familial vacuolar myopathy with autosomal recessive inheritance (hereditary inclusion body myopathy) was mapped to chromosome 9 by genome‐wide linkage analysis of nine Persian‐Jewish families. Since both disease conditions share similar clinical, genetic, and histopathological features, we analyzed seven families with distal myopathy with rimmed vacuoles using ten microsatellite markers within the region of the hereditary inclusion body myopathy locus. Significantly high cumulative pairwise lod scores were obtained with three markers: D9S248 ( Z max = 5.90 at Θ = 0), D9S43 ( Z max = 5.25 at Θ = 0), and D9S50 ( Z max = 4.23 at Θ = 0). Detection of obligate recombination events as well as multipoint linkage analysis revealed that the most likely location of the distal myopathy with rimmed vacuoles gene is in a 23.3‐cM interval defined by D9S319 and D9S276 on chromosome 9. The results raise the possibility that distal myopathy with rimmed vacuoles and hereditary inclusio body myopathy in Persian Jews are allelic diseases.