Genetic analysis of a novel FBN1 mutation in a pediatric Marfan syndrome patient.

IF 1.1 Q2 MEDICINE, GENERAL & INTERNAL
Xiangdong Zhang, Lixing Zhou, Jiao Liu, Qunda Shan, Zhaoxia Song, Fang Zhou, Lifang Liu, Xia Luo
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Abstract

The aim of this study was to investigate a novel FBN1 gene mutation in a pediatric patient with Marfan syndrome (MFS) to provide a theoretical basis for genetic counseling. The subject was a 5-month-old male infant. With informed consent from the proband and his family, 2 mL of peripheral venous blood was collected from the patient, his father, mother, and sister. DNA was extracted using a DNA extraction kit with EDTA-K as an anticoagulant. The extracted DNA was subjected to minigene transcription and bioinformatics analysis. For minigene construction, wild-type and mutant minigenes were inserted into pcMINI and pcMINI-C vectors, respectively. Four recombinant vectors were transfected into the HeLa and 293T cell lines. After transfection for 48 hours, RNA was extracted from eight samples. DNA was also extracted from the family members' samples to construct a library. Target regions were captured using the SureSelect Human All Exon V6 (Agilent) kit and were sequenced with Illumina NovaSeq (sequencing read length 2×150 bp). Bioinformatic analysis identified the c.8226+5del mutation as a variant of uncertain clinical significance (VOUS). Literature and database reviews confirmed that this mutation had not been previously reported, identifying it as a novel mutation. The study identified a novel FBN1 mutation, c.8226+5del, that may be associated with clinical features such as low-set ears and distinctive facial characteristics in the proband. This mutation likely affects normal mRNA splicing, altering the structure and function of Exon 64 and potentially contributing to the development of autosomal dominant MFS.

对一名小儿马凡氏综合征患者的新型 FBN1 基因突变的遗传分析。
本研究旨在调查一名马凡氏综合征(MFS)儿科患者的新型 FBN1 基因突变,为遗传咨询提供理论依据。研究对象是一名 5 个月大的男婴。在征得患者及其家人的知情同意后,采集了患者及其父亲、母亲和姐姐的 2 mL 外周静脉血。使用以 EDTA-K 作为抗凝剂的 DNA 提取试剂盒提取 DNA。对提取的 DNA 进行迷你基因转录和生物信息学分析。在构建迷你基因时,将野生型和突变型迷你基因分别插入 pcMINI 和 pcMINI-C 载体。四种重组载体被转染到 HeLa 和 293T 细胞系中。转染 48 小时后,从 8 个样本中提取 RNA。还从家庭成员的样本中提取了 DNA,以构建文库。使用 SureSelect Human All Exon V6(Agilent)试剂盒捕获目标区域,并用 Illumina NovaSeq 测序(测序读长为 2×150 bp)。生物信息学分析确定 c.8226+5del 突变为临床意义不确定的变异(VOUS)。文献和数据库审查证实,该突变以前未被报道过,因此被确定为新型突变。该研究发现了一种新的 FBN1 基因突变(c.8226+5del),它可能与该患者的临床特征(如低耳和独特的面部特征)有关。这种突变可能会影响正常的 mRNA 剪接,改变第 64 号外显子的结构和功能,并可能导致常染色体显性 MFS 的发生。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Intractable & rare diseases research
Intractable & rare diseases research MEDICINE, GENERAL & INTERNAL-
CiteScore
2.10
自引率
0.00%
发文量
29
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