Atypical phenotype in a patient with ceruloplasmin mutations in the compound heterozygous state

IF 0.8 Q4 GENETICS & HEREDITY Meta Gene Pub Date : 2021-09-01 DOI:10.1016/j.mgene.2021.100905
Giulia Ravasi , Sara Pelucchi , Francesco Canonico , Raffaella Mariani , Alberto Piperno
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引用次数: 2

Abstract

Aceruloplasminemia is an ultra-rare and fatal autosomal recessive disease with a long lasting neurological disabling period of life caused by mutations in ceruloplasmin gene. Disease phenotype is heterogeneous and variably characterized by iron-restricted erythropoiesis and microcytic anemia, hyperferritinemia with tissue iron accumulation in liver, pancreas and brain, diabetes, retinopathy and neurodegeneration. Although most heterozygotes are asymptomatic, they might present with significant neurological symptoms at some point in their lives. We report here a patient with hyperferritinemia and severe depressive disorder, harbouring two mutations in ceruloplasmin in the compound heterozygous state (p.Pro477Leu and p.Gly895Ala). Both mutations are classified as deleterious in silico, but in vitro functional study partially confirmed it. Our findings suggest that the two mutations cooperate in inducing low ceruloplasmin production in the range observed in aceruloplasminemia heterozygotes and raise the question whether this might increase patient's susceptibility to neurologic manifestations.

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复合杂合状态下铜蓝蛋白突变患者的非典型表型
铜蓝蛋白血症是一种由铜蓝蛋白基因突变引起的超罕见、致死性常染色体隐性遗传病,具有长期的神经系统失能期。疾病表型是异质性和可变的,以铁限制性红细胞和小细胞性贫血为特征,高铁蛋白血症伴肝、胰腺和脑组织铁积累,糖尿病,视网膜病变和神经变性。虽然大多数杂合子是无症状的,但他们可能在生命的某个阶段出现明显的神经系统症状。我们在此报告一位患有高铁蛋白血症和严重抑郁症的患者,在复合杂合状态下携带两个铜蓝蛋白突变(p.Pro477Leu和p.Gly895Ala)。这两种突变在计算机上都被归类为有害的,但在体外功能研究中部分证实了这一点。我们的研究结果表明,这两种突变共同诱导了在紫纤溶酶血症杂合子中观察到的范围内的低铜蓝蛋白产生,并提出了这是否可能增加患者对神经系统表现的易感性的问题。
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来源期刊
Meta Gene
Meta Gene Biochemistry, Genetics and Molecular Biology-Genetics
CiteScore
1.10
自引率
0.00%
发文量
20
期刊介绍: Meta Gene publishes meta-analysis, polymorphism and population study papers that are relevant to both human and non-human species. Examples include but are not limited to: (Relevant to human specimens): 1Meta-Analysis Papers - statistical reviews of the published literature of human genetic variation (typically linked to medical conditionals and/or congenital diseases) 2Genome Wide Association Studies (GWAS) - examination of large patient cohorts to identify common genetic factors that influence health and disease 3Human Genetics Papers - original studies describing new data on genetic variation in smaller patient populations 4Genetic Case Reports - short communications describing novel and in formative genetic mutations or chromosomal aberrations (e.g., probands) in very small demographic groups (e.g., family or unique ethnic group). (Relevant to non-human specimens): 1Small Genome Papers - Analysis of genetic variation in organelle genomes (e.g., mitochondrial DNA) 2Microbiota Papers - Analysis of microbiological variation through analysis of DNA sequencing in different biological environments 3Ecological Diversity Papers - Geographical distribution of genetic diversity of zoological or botanical species.
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