Abnormal iron metabolism in fibroblasts from a patient with the neurodegenerative disease hereditary ferritinopathy.

Abnormal iron metabolism in fibroblasts from a patient with the neurodegenerative disease hereditary ferritinopathy.
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DOI:
10.1186/1750-1326-5-50
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发表时间:
2010-11-10
影响因子:
15.1
通讯作者:
Vidal R
Vidal R
中科院分区:
医学1区
文献类型:
--
作者:
Barbeito AG;Levade T;Delisle MB;Ghetti B;Vidal R

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铁蛋白轻链多肽 (FTL) 基因的外显子 4 中的核苷酸重复会导致常染色体显性神经退行性疾病神经铁蛋白病或遗传性铁蛋白病 (HF)。心力衰竭患者的病理检查显示,中枢神经系统 (CNS) 的神经元和胶质细胞以及其他器官系统的细胞(包括皮肤成纤维细胞)中铁蛋白和铁积聚异常。为了获得对 HF 分子基础的一些了解,我们对来自具有 FTL c.497_498dupTC 突变的个体的人皮肤成纤维细胞的原代培养物中的铁代谢进行了表征。与正常对照相比,HF成纤维细胞表现出异常的铁代谢,包括铁蛋白多肽、二价金属转运蛋白1、基础铁含量和活性氧水平升高,以及转铁蛋白受体1和IRE-IRP结合活性水平降低。我们的数据表明,心力衰竭成纤维细胞复制了心力衰竭患者中枢神经系统中观察到的异常铁代谢。我们认为心力衰竭成纤维细胞是一种独特的细胞模型,可用于研究铁代谢异常在心力衰竭发病机制中的作用,而不会产生因过度表达或缺乏内源性翻译调节元件而产生的伪影。
Nucleotide duplications in exon 4 of the ferritin light polypeptide (FTL) gene cause the autosomal dominant neurodegenerative disease neuroferritinopathy or hereditary ferritinopathy (HF). Pathologic examination of patients with HF has shown abnormal ferritin and iron accumulation in neurons and glia in the central nervous system (CNS) as well as in cells of other organ systems, including skin fibroblasts. To gain some understanding on the molecular basis of HF, we characterized iron metabolism in primary cultures of human skin fibroblasts from an individual with the FTL c.497_498dupTC mutation. Compared to normal controls, HF fibroblasts showed abnormal iron metabolism consisting of increased levels of ferritin polypeptides, divalent metal transporter 1, basal iron content and reactive oxygen species, and decreased levels of transferrin receptor-1 and IRE-IRP binding activity. Our data indicates that HF fibroblasts replicate the abnormal iron metabolism observed in the CNS of patients with HF. We propose that HF fibroblasts are a unique cellular model in which to study the role of abnormal iron metabolism in the pathogenesis of HF without artifacts derived from over-expression or lack of endogenous translational regulatory elements.
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