Mutación genética

Mutaci ó n Genetica
  • 文章类型: Case Reports
    60岁的女性提到视力残疾。她在所有周边视网膜出现骨针色素沉着和视网膜萎缩,以及黄斑视网膜斑点。多模式成像显示了两种遗传性视网膜营养不良(IRD)的典型发现。视网膜电图证实棒功能障碍。在ABCA4和CNGA1基因中发现双等位基因突变。虽然不常见,不同的IRD可以同时存在于同一患者中。这是首例RP与迟发性Stargardt病合并的病例。我们建议将这种新型临床实体命名为“Stargardt的色素变性”。
    60-year-old woman referring visual disability. She presented bone spicule pigmentation and retinal atrophy in all peripheral retina, as well as macular retinal flecks. Multimodal imaging showed typical findings of both inherited retinal dystrophies (IRD). Electroretinogram confirmed rod dysfunction. Biallelic mutations were found in ABCA4 and CNGA1 genes. Although not common, different IRDs may be present in a same patient at the same time. This is the first reported case of the combination of RP with late-onset Stargardt\'s disease. We propose the name \'Stargardt\'s pigmentosa\' for this novel clinical entity.
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  • 文章类型: Journal Article
    So far, most cases of hypercholesterolaemia (60-80%) are attributed to pathogenic variants in the LDLR gene. Only 1-5% of cases are caused by variants in the APOB gene, and 0-3% by variants in the PCSK9 gene. There is a large variety in known pathogenic mutations of the LDLR gene, while for those affecting the APOB gene, the highest incidence is p.Arg3527Gln, described predominantly in Central European and North American populations. In the Iberian Peninsula the predominant gene affected is that of the LDL receptor, similar to the rest of the world, with the involvement of the APOB gene being described in individuals from the northwest, and anecdotal in the rest of the territory. A genetics analysis was performed on the population attending the first year of a lipid clinic in southwestern Spain with a 6-point score from the Dutch lipid clinics. The genetic, biochemical and clinical findings are described. The first findings show indications of a possible higher prevalence of patients with mutation in the APOB gene compared to other territories. Historical evidence is presented that could give a possible explanation to this, thus supporting the assumption.
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