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Monoclonal antibody-based serological assays for detection of Potato virus S in potato plants

机译:基于单克隆抗体的血清学检测马铃薯植物中马铃薯S病毒的方法

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摘要

Potato virus S (PVS) often causes significant losses in potato production in potato-growing countries. In this study, the ordinary strain of PVS (PVSO) was purified from PVS-infected potato plants and used as the immunogen to produce hybridomas secreting monoclonal antibodies (MAbs). Five highly specific and sensitive murine MAbs (1A3, 16C10, 18A9, 20B12, and 22H4) against PVS were prepared using conventional hybridoma technology. Using these MAbs, tissue print-enzyme-linked immunosorbent assay (ELISA), dot-ELISA, and double-antibody sandwich (DAS)-ELISA were developed for sensitive and specific detection of PVS infection in potato plants. The results of sensitivity assays revealed that PVS could be reliably detected in PVS-infected leaf crude extracts diluted at 1:10 240 and 1:163 840 (w/v, g/ml) in phosphate buffer saline (PBS) by dot-ELISA and DAS-ELISA, respectively. Twenty-two samples collected from potato fields in Yunnan Province, China were tested for PVS infection using the serological assays we had developed, and 14 of them were found to be positive. This indicates that PVS is now prevalent in potato fields in Yunnan Province.
机译:马铃薯S病毒(PVS)通常在马铃薯种植国造成马铃薯生产的重大损失。在这项研究中,从感染了PVS的马铃薯植物中纯化了普通的PVS菌株(PVS O ),并用作免疫原来生产分泌单克隆抗体(MAb)的杂交瘤。使用常规杂交瘤技术制备了五种针对PVS的高特异性和敏感性鼠单克隆抗体(1A3、16C10、18A9、20B12和22H4)。使用这些单克隆抗体,开发了组织印刷酶联免疫吸附测定(ELISA),斑点ELISA和双抗体夹心(DAS)-ELISA,用于马铃薯植物中PVS感染的灵敏和特异性检测。敏感性分析的结果表明,通过点酶联免疫吸附法(dot-ELISA),可以在磷酸盐缓冲液(PBS)中以1:10 240和1:163 840(w / v,g / ml)稀释的PVS感染的叶片粗提物中可靠地检测PVS。和DAS-ELISA。使用我们开发的血清学检测方法,从中国云南省马铃薯田采集的22份样品进行了PVS感染测试,结果发现其中14份呈阳性。这表明PVS现在在云南省的马铃薯田中盛行。

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