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首页> 外文期刊>Electrophoresis: The Official Journal of the International Electrophoresis Society >Failure of immunocompetitive capillary electrophoresis assay to detect disease-specific prion protein in buffy coat from humans and chimpanzees with Creutzfeldt-Jakob disease
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Failure of immunocompetitive capillary electrophoresis assay to detect disease-specific prion protein in buffy coat from humans and chimpanzees with Creutzfeldt-Jakob disease

机译:免疫竞争性毛细管电泳法未能检测出患有克雅氏病的人和黑猩猩的血沉棕黄层中的疾病特异性病毒蛋白

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摘要

The emergence of a new environmentally caused variant of Creutzfeldt-Jakob disease (vCJD), the result of food-born infection by the causative agent of bovine spongiform encephalopathy (BSE), has stimulated research on a practical diagnostic screening test. The immunocompetitive capillary electrophoresis (ICCE) assay has been reported to detect disease-specific, proteinase-resistant prion protein (PrPres) in the blood of scrapie-infected sheep. We have applied this method to blood from CJD-infected chimpanzees and humans. The threshold of detection achieved with our ICCE was 0.6 nM of synthetic peptide corresponding to the prion protein (PrP) C-terminus, and 2 nM of recombinant human PrP at the optimized conditions. However, the test was unable to distinguish between extracts of leucocytes from healthy and CJD-infected chimpanzees, and from healthy human donors and patients affected with various forms of CJD. Thus, the ICCE assay as presently performed is not suitable for use as a screening test in human transmissible spongiform encephalopathies (TSEs). [References: 8]
机译:牛海绵状脑病(BSE)病原体感染由食物引起的感染,新的由环境引起的克雅氏病(vCJD)变种的出现刺激了实用诊断筛查试验的研究。据报道,免疫竞争性毛细管电泳(ICCE)检测可检测被痒病感染的绵羊血液中的疾病特异性抗蛋白酶,蛋白(PrPres)。我们已经将此方法应用于感染了CJD的黑猩猩和人类的血液。我们的ICCE达到的检测阈值为在优化条件下对应于病毒蛋白(PrP)C端的0.6 nM合成肽和2 nM重组人PrP。但是,该测试无法区分健康和CJD感染黑猩猩的白细胞提取物,以及健康人类供体和患有各种形式CJD的患者的白细胞提取物。因此,目前进行的ICCE测定不适用于人类可传播的海绵状脑病(TSE)中的筛选测试。 [参考:8]

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