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在家族性高胆固醇血症中LDLRc.97C>T (p.Gln33Ter) 突变的致病性

Kaihan Wang¹, Tingting Hu², Mengmeng Tai¹

¹Department of Cardiology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China.

Molecular genetics & genomic medicine

|November 27, 2024

概括

这种LDLRc.97C>T (p.Gln33Ter) 突变通过阻止LDLR蛋白质合成和LDL吸收,导致家族性高胆固醇血症 (FH). 这种致病突变不会引发无意义介导的mRNA衰变 (NMD).

科学领域:

遗传学遗传学是一个
分子生物学分子生物学
生物化学生物化学

背景情况:

家族性高胆固醇血症 (FH) 是一种遗传性疾病,其特征是高胆固醇水平.
低密度脂蛋白受体 (LDLR) 基因的突变是FH的主要原因.
LDLR c.97C>T (p.Gln33Ter) 突变是一种特定的基因变异,研究其在FH中的作用.

研究的目的:

在实验室中功能验证LDLRc.97C>T (p.Gln33Ter) 突变的致病性.
要确定这种无意义突变是否会诱导无意义介导的mRNA衰变 (NMD).

主要方法:

整体外因子测序和桑格测序用于识别和确认FH患者的突变.
在基分析预测了突变的病原性.
针对位点的突变发生在HEK293T细胞中产生了LDLRc.97C>T (p.Gln33Ter) 突变,用于功能研究.
流式细胞计,qPCR,西部斑点和显微镜评估了LDLR表达和LDL吸收.

主要成果:

确定了LDLRc.97C>T (p.Gln33Ter) 突变是研究家庭中FH的原因,受影响的成员显示LDL-C水平升高.
在体外实验表明,这种突变取消了LDLR蛋白合成.
具有突变的细胞失去了吸收LDL的能力.

结论:

证实LDLRc.97C>T (p.Gln33Ter) 突变是致病的,导致FH.
这种特定的无意义突变不会诱导无意义介导的mRNA衰变 (NMD).

关键词:

家庭性高胆固醇血症是什么?低密度脂蛋白受体的受体是低密度的脂蛋白受体.没有意义的突变突变.整个exome测序的测序

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