Department of Neurology, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX, USA.
Texas Parks and Wildlife Department, Kerrville, TX, USA.
Sci Rep. 2023 Nov 17;13(1):20171. doi: 10.1038/s41598-023-47105-9.
Chronic wasting disease (CWD) is a prion disease affecting cervids. CWD diagnosis is conducted through enzyme-linked immunosorbent assay (ELISA) and immunohistochemistry (IHC) in retropharyngeal lymph nodes. Unfortunately, these techniques have limited sensitivity against the biomarker (CWD-prions). Two in vitro prion amplification techniques, real-time quaking-induced conversion (RT-QuIC) and protein misfolding cyclic amplification (PMCA), have shown promise in detecting CWD-prions in tissues and bodily fluids. Recent studies have demonstrated that RT-QuIC yields similar results compared to ELISA and IHC. Here, we analyzed 1003 retropharyngeal lymph nodes (RPLNs) from Texas white-tailed deer. PMCA detected CWD at a higher rate compared to ELISA/IHC, identified different prion strains, and revealed the presence of CWD-prions in places with no previous history. These findings suggest that PMCA exhibits greater sensitivity than current standard techniques and could be valuable for rapid and strain-specific CWD detection.
慢性消瘦病(CWD)是一种影响鹿科动物的朊病毒病。CWD 的诊断通过酶联免疫吸附测定(ELISA)和后咽淋巴结的免疫组织化学(IHC)进行。不幸的是,这些技术对生物标志物(CWD-朊病毒)的敏感性有限。实时震颤诱导转化(RT-QuIC)和蛋白质错误折叠循环扩增(PMCA)这两种体外朊病毒扩增技术在检测组织和体液中的 CWD-朊病毒方面显示出了前景。最近的研究表明,RT-QuIC 的结果与 ELISA 和 IHC 相似。在这里,我们分析了来自德克萨斯州白尾鹿的 1003 个后咽淋巴结(RPLN)。与 ELISA/IHC 相比,PMCA 检测到 CWD 的比率更高,鉴定出不同的朊病毒株,并在以前没有历史记录的地方发现了 CWD-朊病毒的存在。这些发现表明,PMCA 比当前的标准技术具有更高的敏感性,可能对快速和特定菌株的 CWD 检测具有重要价值。