Blood:ABCC4基因和PEL阴性血型

2019-12-12 QQY MedSci原创

罕见的PEL阴性表型是最后一个遗传基础不明的血型之一。通过结合全外显子测序和比较整体蛋白质组研究,Azouzi等人发现在PEL阴性个体中,编码ATP结合盒(ABC)转运蛋白的ABCC4/MRP4基因存在大片段缺失。

中心点:

编码多重耐药蛋白的ABCC4基因划分了新的PEL人血型系统。

罕见的PEL阴性表型与血小板聚集功能受损有关。

摘要:

罕见的PEL阴性表型是最后一个遗传基础不明的血型之一。通过结合全外显子测序和比较整体蛋白质组研究,Azouzi等人发现在PEL阴性个体中,编码ATP结合盒(ABC)转运蛋白的ABCC4/MRP4基因存在大片段缺失。

PEL在ABCC4-CRIDPT-Cas9 K562细胞上的表达缺失及其在ABCC4转染的细胞中的过表达,证明了ABCC4是构成PEL血型抗原的基因。虽然ABCC4是一个重要的环状核苷酸转运蛋白,但来源于ABCC4null/PEL阴性个体的红细胞表现出正常的cGMP水平,提示红细胞内存在其他ABC转运蛋白的代偿机制。

有趣的是,PEL阴性个体表现出血小板聚集功能受损,证实了ABCC4在血小板功能中的作用。最后,研究人员还发现ABCC4基因的功能缺失突变,改变了PEL抗原的表达,与白血病预后相关。

综上所述,本研究表明,除了ABCC4基因分型外,PEL表型分型还为白血病药物剂量调节开辟了一条新的途径。

原始出处:

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    2020-03-11 feather89
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    2019-12-14 xirongguo
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