Sci Transl Med:新的血液检测可以测到朊病毒

2016-12-30 生物探索 生物探索

导读 两项12月21日发表在Science Translational Medicine上的研究显示一个新的血液测试可以检测甚至很微量的朊病毒感染。两项12月21日发表在Science Translational Medicine上的研究显示一个新的血液测试可以检测甚至很微量的朊病毒感染。无可救药的朊病毒疾病——如牛的疯牛病(BSE)和人的变异型克雅氏病(vCJD),通过将一个正常的称为PRP的脑

导读 两项12月21日发表在Science Translational Medicine上的研究显示一个新的血液测试可以检测甚至很微量的朊病毒感染。



两项12月21日发表在Science Translational Medicine上的研究显示一个新的血液测试可以检测甚至很微量的朊病毒感染。


无可救药的朊病毒疾病——如牛的疯牛病(BSE)和人的变异型克雅氏病(vCJD),通过将一个正常的称为PRP的脑蛋白扭曲到致病“朊病毒”的形状,造成杀死大脑中神经细胞的结果。在英国,多达30000人可能是朊病毒的携带者,可能是使用疯牛病感染的牛肉而获得的。卫生官员担心,受感染的人可以无意中通过输血将朊病毒传给别人。有四个这样的案件已经被记录。但到目前为止,还没有办法为感染蛋白筛查血液样本。

在文章描述的测试中描述了该研究的设计是用纤维蛋白溶酶原蛋白包被磁性纳米珠。纤维蛋白溶酶原蛋白是结合朊病毒蛋白的。清洗珠子可以除去血液中的其他物质。研究人员然后将正常的PrP加到磁珠中去。如果任何朊病毒和磁珠结合、传染性蛋白会将PrP扭曲成朊病毒的形式,也会和磁珠结合。经过多轮结合,研究人员可以扩增足够的检测信号来测试哪个样本有vCJD朊病毒。
在这两项研究中,没有健康的人或其他退化性脑疾病(包括阿尔茨海默氏症和帕金森氏症)的人有血液中存在感染性蛋白的证据。83人中只有一个有不定期发生的克雅氏病形式的人测试呈阳性。在两篇文章中,研究人员都是收集冰冻的血液样本,31个月和16个月查出vCJD症状朊病毒。这些结果表明,试验特定针对vCJD朊病毒形式。

原始出处:

[1] New blood tests can detect prions.ScienceNews.DECEMBER 21, 2016.
 
[3] Luis Concha-Marambio,et al. Detection of prions in blood from patients with variant Creutzfeldt-Jakob disease. Science Translational Medicine. 21 Dec 2016.

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