STM:新的检测方法可有效检测变异型克雅氏病患者血液中的朊病毒

2016-12-27 MedSci MedSci原创

近日,来自休斯敦德克萨斯大学健康科学中心(UTHealth)的一项新的研究研发了一种精确的生化检验,可检测变异型克雅氏病患者血液中的朊病毒,该结果发表在了 Science Translational Medicine。人朊病毒病包括偶发性和变异型克雅氏病 (CJD and vCJD)具有传染性并致命性,会引起神经细胞或神经元进行性退变或死亡。每年全球范围的CJD发病率大概是每百万人口新增病例1例。

近日,来自休斯敦德克萨斯大学健康科学中心(UTHealth)的一项新的研究研发了一种精确的生化检验,可检测变异型克雅氏病患者血液中的朊病毒,该结果发表在了 Science Translational Medicine。

人朊病毒病包括偶发性和变异型克雅氏病 (CJD and vCJD)具有传染性并致命性,会引起神经细胞或神经元进行性退变或死亡。

每年全球范围的CJD发病率大概是每百万人口新增病例1例。

更为罕见的VCJD是1996年英国首先报道的一种新疾病。这种病被认为起源于食用患牛海绵状脑病 (BSE or疯牛病)牛肉的人或接受了无症状感染供血者输血的人。


在新研究中,研究团队分析了14位诊断为VCJDK的病人和153名对照者的血液样本。对照者包括散发性的CJD患者和有其他脑问题的患者—如痴呆,帕金森病,脑损伤,中风和癫痫,还有49名健康个体。

为了检测VCJD朊病毒,该团队使用了名为“蛋白质错误折叠循环扩增法” (PMCA)的新方法。该团队研发的该方法模拟了发生在大脑中的朊病毒病的朊病毒复制。

结果显示,PMCA法检测到朊病毒在VCJD患者的血液样本中具有100%敏感性和特异性。

研究者指出,需要进一步研究来验证新技术。一旦证实,新的试验就可以用于VCJD症状出现前的无创性诊断和筛查朊病毒污染的血液供应。

研究人员认为“早期诊断可以在实质性脑损伤出现之前使用各种潜在治疗方法。在血液供应上,有效检测出少量病原体可以清除被朊病毒感染的血液,可以大大减少新增病人。”

目前该团队还在研究一种PMCA版本,以检测散发性CJD相关的朊病毒。

原始出处:

[1] Catharine Paddock. New blood test for prion disease looks promising. MNT, 22 December 2016.

[2] Luis Concha-Marambio et al., Detection of prions in blood from patients with variant Creutzfeldt-Jakob disease, Science Translational Medicine, 21 December 2016.

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    2017-07-07 gdsun
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    2016-12-27 1e184d7bm65(暂无匿称)

    棒棒哒????????

    0

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    2016-12-27 孙志彬

    说了才明白,领教

    0