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CLIN CHEM:多重液滴数字PCR方法适用于新生儿筛查,载体状态和脊髓性肌萎缩的评估

2018-10-30 MedSci MedSci原创

脊髓性肌萎缩症(SMA)是一种进行性神经肌肉疾病,伴有神经元变性,会导致肌肉萎缩和呼吸衰竭。SMA通常由包括存活运动神经元基因SMN1的外显子7的纯合缺失引起,并且其临床过程受附近5q SMN1旁系同源物SMN2的拷贝数影响。多重连接探针扩增(MLPA)和实时定量PCR(qPCR)可以检测SMN1缺失。然而,qPCR需要标准化或标准曲线,并且MLPA要求DNA浓度高于可从干血斑(DBS)获得的浓度

脊髓性肌萎缩症(SMA)是一种进行性神经肌肉疾病,伴有神经元变性,会导致肌肉萎缩和呼吸衰竭。SMA通常由包括存活运动神经元基因SMN1的外显子7的纯合缺失引起,并且其临床过程受附近5q SMN1旁系同源物SMN2的拷贝数影响。多重连接探针扩增(MLPA)和实时定量PCRqPCR)可以检测SMN1缺失。然而,qPCR需要标准化或标准曲线,并且MLPA要求DNA浓度高于可从干血斑(DBS)获得的浓度。在此,研究人员开发了一种多重液滴数字PCRddPCR)方法,用于同时检测SMN1DBS和其他组织中的缺失和SMN2拷贝数变异。还开发了用于DBS SMN1 Sanger测序过程。

研究人员用Bio-Rad AutoDGQX200 ddPCR系统同时测量SMN1SMN2RPP30浓度。共测试了1530DBS12SMA患者。

群体研究证实在未受影响的标本中检测到15SMN1外显子7拷贝,而SMA患者为0SMN1拷贝。对于≥1SMN1拷贝的个体,检测内和检测间不精确度<7.1CV 。测试12SMA阳性样品灵敏度和特异性为100%。

研究表明,该ddPCR方法灵敏,特异,适用于对SMA的新生儿筛查和携带者状态检测。它还可以与平行的ddPCR T细胞切除检测结合,用于严重的联合免疫缺陷治疗。

原始出处:

Noemi Vidal-Folch, Dimitar Gavrilov, Multiplex Droplet Digital PCR Method Applicable to Newborn Screening, Carrier Status, and Assessment of Spinal Muscular Atrophy.

本文系梅斯医学(MedSci)原创编译整理,转载需授权!


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    2019-09-11 mei539
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    2019-06-29 chendoc252
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    2018-11-01 Tommy1950
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    2018-10-30 清风拂面

    谢谢分享学习

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