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Two families with Wilson disease in which siblings showed different phenotypes.
Journal of Human Genetics ( IF 2.6 ) Pub Date : 2002-10-12 , DOI: 10.1007/s100380200082
Yukiko Takeshita 1 , Norikazu Shimizu , Yukitoshi Yamaguchi , Hiroki Nakazono , Miyuki Saitou , Yoshinao Fujikawa , Tsugutoshi Aoki
Affiliation  

We investigated two families with Wilson disease in which siblings showed different clinical phenotypes and different ages at onset. In Family 1, the second and fourth male children demonstrated onset of the neurological type of Wilson disease at 16 and 28 years of age, respectively, and the first female child developed the hepatic type at 38 years of age. In Family 2, the second male child showed neurological symptoms at 32 years of age and was diagnosed as having the hepatoneurological type of Wilson disease; then the 35-year-old first female child was found to have the hepatic type by familial screening. We performed mutation analysis of the ATP7B gene for these patients, and found that the mutation was a compound heterozygote in both families. Previous reports of siblings with Wilson disease have shown an identical clinical phenotype and similar ages at onset. In addition, hepatic-type cases generally occur at lower ages compared with the neurological type. In the present investigation, however, younger patients showed neurological symptoms earlier than their older siblings, and clinical phenotypes differed among siblings in both families. These cases appear to be rare. Individual differences in copper accumulation in hepatic cells and intolerance to copper toxicity might be the reason for this phenomenon. Furthermore, there might be a difference in the dominance of the allele expressing ATP7B protein among these cases, resulting in different clinical phenotypes, because all patients of both families were found to be compound heterozygotes.

中文翻译:

两个患有威尔逊病的家庭,其中兄弟姐妹表现出不同的表型。

我们调查了两个患有威尔逊病的家庭,其中兄弟姐妹在发病时表现出不同的临床表型和不同的年龄。在家庭1中,第二个和第四个男孩分别在16岁和28岁时表现出威尔逊氏病的神经系统类型,而第一个女孩在38岁时表现出肝病类型。在家庭2中,第二个男孩在32岁时表现出神经系统症状,并被诊断出患有威尔逊氏病。然后通过家族筛查发现35岁的第一个女婴患有肝型。我们对这些患者进行了ATP7B基因的突变分析,发现该突变是两个家庭中的复合杂合子。先前有关威尔逊氏病兄弟姐妹的报告显示,其临床表型相同,发病年龄相似。此外,肝型病例通常比神经型病例年龄低。然而,在本研究中,年轻患者的神经症状比其年长的兄弟姐妹更早,而且两个家庭的兄弟姐妹的临床表型也不同。这些情况很少见。肝细胞中铜积累的个体差异和对铜毒性的不耐受性可能是造成这种现象的原因。此外,在这些情况下,表达ATP7B蛋白的等位基因的优势可能存在差异,导致不同的临床表型,因为发现两个家族的所有患者都是复合杂合子。肝型病例通常比神经型病例低。然而,在本研究中,年轻患者的神经系统症状要早于年长的兄弟姐妹,而且两个家庭的兄弟姐妹的临床表型也不同。这些情况很少见。肝细胞中铜积累的个体差异和对铜毒性的不耐受性可能是造成这种现象的原因。此外,在这些情况下,表达ATP7B蛋白的等位基因的优势可能存在差异,导致不同的临床表型,因为发现两个家族的所有患者都是复合杂合子。肝型病例通常比神经型病例低。然而,在本研究中,年轻患者的神经系统症状要早于年长的兄弟姐妹,而且两个家庭的兄弟姐妹的临床表型也不同。这些情况很少见。肝细胞中铜积累的个体差异和对铜毒性的不耐受性可能是造成这种现象的原因。此外,在这些情况下,表达ATP7B蛋白的等位基因的优势可能存在差异,导致不同的临床表型,因为发现两个家族的所有患者都是复合杂合子。较年轻的患者比其较大的兄弟姐妹更早出现神经系统症状,并且两个家庭的兄弟姐妹之间的临床表型也不同。这些情况很少见。肝细胞中铜积累的个体差异和对铜毒性的不耐受性可能是造成这种现象的原因。此外,在这些情况下,表达ATP7B蛋白的等位基因的优势可能存在差异,导致不同的临床表型,因为发现两个家族的所有患者都是复合杂合子。较年轻的患者比其较大的兄弟姐妹更早出现神经系统症状,而且两个家庭的兄弟姐妹之间的临床表型也不同。这些情况很少见。肝细胞中铜积累的个体差异和对铜毒性的不耐受性可能是造成这种现象的原因。此外,在这些情况下,表达ATP7B蛋白的等位基因的优势可能存在差异,导致不同的临床表型,因为发现两个家族的所有患者都是复合杂合子。
更新日期:2019-11-01
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