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常染色体隐性遗传性痉挛性截瘫的一个新基因座定位于16号染色体q24.3区域。

A new locus for autosomal recessive hereditary spastic paraplegia maps to chromosome 16q24.3.

作者信息

De Michele G, De Fusco M, Cavalcanti F, Filla A, Marconi R, Volpe G, Monticelli A, Ballabio A, Casari G, Cocozza S

机构信息

Department of Neurology, Federico II University, Naples, Italy.

出版信息

Am J Hum Genet. 1998 Jul;63(1):135-9. doi: 10.1086/301930.

Abstract

Hereditary spastic paraplegia is a genetically and phenotypically heterogeneous disorder. Both pure and complicated forms have been described, with autosomal dominant, autosomal recessive, and X-linked inheritance. Various loci (SPG1-SPG6) associated with this disorder have been mapped. Here, we report linkage analysis of a large consanguineous family affected with autosomal recessive spastic paraplegia with age at onset of 25-42 years. Linkage analysis of this family excluded all previously described spastic paraplegia loci. A genomewide linkage analysis showed evidence of linkage to chromosome 16q24.3, with markers D16S413 (maximum LOD score 3.37 at recombination fraction [theta] of .00) and D16S303 (maximum LOD score 3.74 at straight theta=.00). Multipoint analysis localized the disease gene in the most telomeric region, with a LOD score of 4.2. These data indicate the presence of a new locus linked to pure recessive spastic paraplegia, on chromosome 16q24.3, within a candidate region of 6 cM.

摘要

遗传性痉挛性截瘫是一种遗传和表型均异质性的疾病。已描述了单纯型和复杂型,其遗传方式包括常染色体显性遗传、常染色体隐性遗传和X连锁遗传。与该疾病相关的多个位点(SPG1-SPG6)已被定位。在此,我们报告了一个患常染色体隐性痉挛性截瘫的大家族的连锁分析,其发病年龄在25至42岁之间。对该家族的连锁分析排除了所有先前描述的痉挛性截瘫位点。全基因组连锁分析显示与16号染色体q24.3存在连锁证据,标记为D16S413(在重组率[θ]为0.00时最大对数优势分数为3.37)和D16S303(在直接θ = 0.00时最大对数优势分数为3.74)。多点分析将疾病基因定位在最末端区域,对数优势分数为4.2。这些数据表明在16号染色体q24.3上一个6厘摩的候选区域内存在一个与单纯隐性痉挛性截瘫相关的新位点。

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