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Transmission of cervid prions to humanized mice demonstrates the zoonotic potential of CWD
Acta Neuropathologica ( IF 12.7 ) Pub Date : 2022-08-22 , DOI: 10.1007/s00401-022-02482-9
Samia Hannaoui 1 , Irina Zemlyankina 1 , Sheng Chun Chang 1 , Maria Immaculata Arifin 1 , Vincent Béringue 2 , Debbie McKenzie 3 , Hermann M Schatzl 1 , Sabine Gilch 1
Affiliation  

Prions cause infectious and fatal neurodegenerative diseases in mammals. Chronic wasting disease (CWD), a prion disease of cervids, spreads efficiently among wild and farmed animals. Potential transmission to humans of CWD is a growing concern due to its increasing prevalence. Here, we provide evidence for a zoonotic potential of CWD prions, and its probable signature using mice expressing human prion protein (PrP) as an infection model. Inoculation of these mice with deer CWD isolates resulted in atypical clinical manifestation with prion seeding activity and efficient transmissible infectivity in the brain and, remarkably, in feces, but without classical neuropathological or Western blot appearances of prion diseases. Intriguingly, the protease-resistant PrP in the brain resembled that found in a familial human prion disease and was transmissible upon second passage. Our results suggest that CWD might infect humans, although the transmission barrier is likely higher compared to zoonotic transmission of cattle prions. Notably, our data suggest a different clinical presentation, prion signature, and tissue tropism, which causes challenges for detection by current diagnostic assays. Furthermore, the presence of infectious prions in feces is concerning because if this occurs in humans, it is a source for human-to-human transmission. These findings have strong implications for public health and CWD management.



中文翻译:

cervid prion 向人源化小鼠的传播证明了 CWD 的人畜共患潜力

朊病毒会导致哺乳动物感染和致命的神经退行性疾病。慢性消耗性疾病 (CWD) 是一种鹿科病毒病,可在野生和养殖动物中有效传播。由于 CWD 的流行率不断上升,其向人类的潜在传播越来越受到关注。在这里,我们使用表达人类朊病毒蛋白 (PrP) 的小鼠作为感染模型,为 CWD 朊病毒的人畜共患潜力及其可能特征提供证据。用鹿 CWD 分离株接种这些小鼠导致非典型临床表现,在大脑中具有朊病毒播种活性和有效的传播感染性,而且值得注意的是,在粪便中,但没有典型的神经病理学或蛋白质印迹表现的朊病毒疾病。有趣的是,大脑中的蛋白酶抗性 PrP 类似于在家族性人类朊病毒病中发现的 PrP,并且在第二次传代时可以传播。我们的结果表明,CWD 可能会感染人类,尽管与牛朊病毒的人畜共患传播相比,传播障碍可能更高。值得注意的是,我们的数据表明存在不同的临床表现、朊病毒特征和组织嗜性,这给当前的诊断检测带来了挑战。此外,粪便中存在传染性朊病毒令人担忧,因为如果这种情况发生在人类身上,它就是人与人之间传播的来源。这些发现对公共卫生和 CWD 管理具有重要意义。尽管与牛朊病毒的人畜共患传播相比,传播障碍可能更高。值得注意的是,我们的数据表明存在不同的临床表现、朊病毒特征和组织嗜性,这给当前的诊断检测带来了挑战。此外,粪便中存在传染性朊病毒令人担忧,因为如果这种情况发生在人类身上,它就是人与人之间传播的来源。这些发现对公共卫生和 CWD 管理具有重要意义。尽管与牛朊病毒的人畜共患传播相比,传播障碍可能更高。值得注意的是,我们的数据表明存在不同的临床表现、朊病毒特征和组织嗜性,这给当前的诊断检测带来了挑战。此外,粪便中存在传染性朊病毒令人担忧,因为如果这种情况发生在人类身上,它就是人与人之间传播的来源。这些发现对公共卫生和 CWD 管理具有重要意义。

更新日期:2022-08-23
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