Division of Molecular Medicine, Department of Pediatrics, Faculty of Medicine, Ege University, İzmir, Turkiye.
Department of Pediatrics, Faculty of Medicine, Ege University, İzmir, Turkiye.
Turk J Med Sci. 2024 May 23;54(5):1135-1146. doi: 10.55730/1300-0144.5892. eCollection 2024.
BACKGROUND/AIM: Autosomal recessive polycystic kidney disease is an inherited kidney disease. This study aims to detect rare and common DNA variants of the gene using next-generation sequencing (NGS) and to classify them in terms of being pathogenic according to The American College of Medical Genetics and Genomics. MATERIALS AND METHODS: NGS analysis was performed on the DNA of 304 patients who were referred to Ege University Molecular Medicine Laboratory with suspected polycystic kidney disease. RESULTS: As a result, a total of 82 different DNA variants, 16 of which were novel, were detected. The breakdown of the variants found is as follows: 73 (89.02%) were missense variants, six (7.32%) nonsense variants, two (2.44%) frameshift deletions, and one (1.22%) nonframeshift deletion. According to The American College of Medical Genetics and Genomics classification of these variants, 26 were benign (Class 5), two were likely benign (Class 4), 36 were of uncertain significance (Class 3), and nine were likely pathogenic (Class 2), nine of which are pathogenic variants (Class 1). Heterozygosity was found in 39 (63.9%) patients, homozygosity in six (9.8%) patients, compound heterozygosity in 12 (19.7%) patients, and complex genotype in four (6.6%) patients in which variants in Class 1, Class 2 and Class 3 were determined according to ACMG classification. When the exon distributions of the DNA variants detected in the gene were analyzed, the most common exons of the DNA variant are exon 32 (n = 9), exon 58 (n = 8), exon 67 (n = 6), exon 61 (n = 5), 30 exons (n = 4). CONCLUSION: This fast and economical molecular diagnostic approach will provide a reliable prenatal diagnostic option, enabling definitive disease diagnosis and the identification of carriers.
背景/目的:常染色体隐性多囊肾病是一种遗传性肾脏疾病。本研究旨在使用下一代测序(NGS)检测 基因的罕见和常见 DNA 变体,并根据美国医学遗传学与基因组学学院将其分类为致病性。
材料和方法:对 304 名疑似多囊肾病患者的 DNA 进行了 NGS 分析,这些患者被转介到 Ege 大学分子医学实验室。
结果:共检测到 82 种不同的 DNA 变体,其中 16 种是新的。发现的变体细目如下:73 种(89.02%)为错义变体,6 种(7.32%)为无义变体,2 种(2.44%)为移码缺失,1 种(1.22%)为非移码缺失。根据这些变体的美国医学遗传学与基因组学学院分类,26 种为良性(5 类),2 种为可能良性(4 类),36 种为意义不明(3 类),9 种为可能致病性(2 类),其中 9 种为致病性变体(1 类)。39 名患者(63.9%)为杂合子,6 名患者(9.8%)为纯合子,12 名患者(19.7%)为复合杂合子,4 名患者(6.6%)为复杂基因型,根据 ACMG 分类,在这些患者中确定了 1 类、2 类和 3 类变体。当分析在 基因中检测到的 DNA 变体的外显子分布时,DNA 变体最常见的外显子是外显子 32(n = 9)、外显子 58(n = 8)、外显子 67(n = 6)、外显子 61(n = 5)、外显子 30(n = 4)。
结论:这种快速且经济的分子诊断方法将提供可靠的产前诊断选择,能够明确疾病诊断和确定携带者。
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