共查询到19条相似文献，搜索用时 156 毫秒
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作者应用已建立的大麦黄花叶病毒(BaYMV)的4F_(10)单克隆抗体杂交瘤细胞株,经小白鼠腹水生产单克隆抗体,用过碘酸钠法制备了辣根过氧化物酶标记的酶标单克隆抗体。并由此建立了检测大麦黄花叶病毒的标准的双抗体夹心酶联免疫吸附法(DAS-ELISA)。其检测提纯病毒的灵敏度为3.0μg/ml左右,感病大麦叶片汁液的最大稀释度为1:2560,病茎稀释度为1:160。对采自我国7个主要BaYMV发病区感病的样品进行了检测,绝大多数均显示强阳性,只有宝山样品例外。本项试验为BaYMV诊断的标准试剂盒的建立进行了有益的尝试。 相似文献
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A蛋白斑点免疫金染色和双抗体夹心酶联检测齿兰环斑病毒的比较 总被引：16，自引：1，他引：15
A蛋白斑点免疫金染色检测齿兰环斑病毒提纯病毒的灵敏度为1.56 ng/μl,检测病汁液的稀释倍数为640倍.同时采用碱性磷酸酯酶标记抗体IgG.IgG包被酶联板的浓度为1 μg/ml,酶标抗体以1 /1000稀释使用.DAS-ELISA技术检测ORSV提纯病毒的灵敏度为0.048 ng/μl,检测病汁液的稀释倍数为20480倍. 相似文献
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检测植物病毒ELISA异种动物抗体双夹心法的研究和应用 总被引：4，自引：0，他引：4
制备南方菜豆叶花叶病毒、大豆花叶病毒、烟草花叶病毒、番茄不孕病毒、苜蓿花叶病毒的兔抗血清和鼠腹水抗体,组合成ELISA异种动物抗体双夹心试验。抗体球蛋白的适宜工作浓度为4微克/毫升;未经纯化的特异抗血清(抗体)的适宜工作浓度为10-4(即1/10,000)稀释度。检测以上5种病毒的灵敏度:提纯抗原为10-0.64毫微克/毫升;病叶澄清液为1/10,000-1/100,000稀释度。本法灵敏度与ELISA双抗体夹心法相当或略高。一般8小时内可得出结果。适用于大量样品的检测。 相似文献
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用香石竹斑驳病毒(CarMV)免疫的BALB/c鼠脾细胞与Sp2/0鼠骨髓瘤细胞融合,经筛选克隆,获得5株能稳定传代且分泌抗CarMV单克隆抗体(MAb)的杂交瘤细胞,并分别制备它们的单克隆抗体腹水。5株单克隆抗体腹水间接ELISA效价达10-6,其中3G1、1B9、2A9和2F8的抗体类型及亚类均为IgG1,而2F2为IgG3。Western-blot分析表明,5株单克隆抗体均与CarMV 38 kD的外壳蛋白亚基有特异性反应。利用2A9单抗建立的抗原包被的间接ELISA (ACP-ELISA)检测CarMV方法,病叶1:800倍稀释、提纯CarMV病毒浓度为1 ng/mL (绝对检测量为0.1 ng)时仍能检测到病毒。利用ACP-ELISA对田间香石竹样品的检测表明,CarMV在香石竹上发病很普遍。 相似文献
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百合无症病毒单克隆抗体制备及快速检测方法的建立 总被引：2，自引：0，他引：2
百合无症病毒(Lily symptomles virus,LSV)属于线形病毒科(Flexiviridae)、麝香石竹潜隐病毒属 (Carlavirus),是危害百合的主要病毒之一。LSV 的寄主范围很窄,只限于百合科(Liliaceae)植物, 单独侵染百合常为隐症,与其他病毒复合侵染时产生花叶、畸形、坏死斑等症状,严重影响百合切花的经济价值。近年来,我国百合种植规模不断扩大, 病毒病发生日趋严重。为了防止病毒随种球扩散与传播,迫切需要建立灵敏、快速的病毒检测方法。我们在百合病毒分子生物学研究的基础上,首次成功制备了LSV单克隆抗体,建立了以单抗为核心的间接抗原包被ELISA(ACP-ELISA)、三抗体夹心ELISA(TAS-ELISA)、免疫斑点法(Dot-ELISA) 和组织印迹法(Tissue blot-ELISA)等快速检测 LSV的方法。 相似文献
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以原核表达的甘薯潜隐病毒(SPLV)的外壳蛋白(CP)为抗原免疫小鼠,经过细胞融合和亚克隆,筛选出2株稳定分泌抗SPLV CP的单克隆抗体杂交瘤细胞株(5B11-2和5G8-2),并分别制备了单克隆抗体腹水。间接ELISA结果表明,用SPLV CP包被酶联板,5B11-2和5G8-2单克隆抗体的效价均为1∶512 000;用感染SPLV的甘薯叶片汁液包被酶联板,2株单克隆抗体的效价均为1∶6 400。抗体类型及亚类鉴定结果表明,2株单克隆抗体均为IgG1、κ轻链。Western blot分析表明,2株单抗均能与SPLV CP和感染SPLV的甘薯叶片汁液有特异性反应。利用单克隆抗体建立的间接抗原包被ELISA(ACP-ELISA)检测SPLV方法,病叶1∶3 840倍稀释仍能检测到病毒。血清学和RT-PCR检测结果表明,制备的单克隆抗体可用于田间甘薯样品的检测。 相似文献
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将纯化的南芥菜花叶病毒(Arabis mosaic virus,ArMV)制剂免疫Balb/c小鼠,末次免疫后第3天取其脾细胞与SP2/0细胞融合,采用选择性培养基、有限稀释法克隆和间接ELISA方法进行筛选,成功获得了2株稳定分泌ArMV单克隆抗体的杂交瘤细胞株并分别命名为3F7,4G10。用间接ELISA方法对所获得的2个杂交瘤细胞株进行亚型鉴定分别为IgA(3F7)、IgG1(4G10)。间接ELISA效价测定结果:3F7为1:106,4G10为1:108。以单克隆抗体为包被抗体、多克隆抗体为检测抗体的TAS-ELISA检测试剂盒能检测感染ArMV的昆诺藜病汁液的灵敏度为1:1600。 相似文献
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蚕豆萎蔫病毒ELISA检测系统建立及其应用 总被引：5，自引：0，他引：5
从制备的蚕豆萎蔫病毒(BBWV)抗血清中提纯IgG,并用过碘酸钠法进行辣根过氧化物酶(HRP)标记,建立了DAS-ELISA检测BBWV的方法。DAS-ELISA检测时包被IgG以26.9 μg/ml效果最好,HRP-IgG结合物以1800~11600效果最佳。DAS-ELISA检测BBWV病叶粗汁液的最大稀释度为1 320,检测提纯病毒的最低浓度为0.744 μg/ml。田间病样测定表明,BBWV在蚕豆、豌豆、豇豆、大豆、茄子和辣椒等作物上发生很普遍,在菜豆上也有零星发生,而在莴苣、芹菜、白菜、萝卜、花椰菜上未测到BBWV。DAS-ELISA检测结果与生物学检测结果基本相符,符合率达97.6%。 相似文献
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Enzyme-linked immunosorbent assay (ELISA) systems were used to examine serological relationships and to detect three luteoviruses; a vector-non-specific strain of barley yellow dwarf virus from Illinois (BYDV-PAV-IL), a strain of beet western yellows virus from California (BWYV-CA) and a dwarfing strain of soybean dwarf virus from Japan (SDV-D). Indirect ELISA (IND-ELISA) systems detected distant reciprocal serological relationships among all three viruses. This is the first report of a serological relationship between a vector-non-specific strain of BYDV and any strain of SDV. Double antibody sandwich ELISA (DAS-ELISA) systems detected the purified homologous viruses at concentrations as low as 1.6 ng/ml. hut did not detect heterologous viruses as concentrated as 800 ng/ml. In contrast, when DAS-ELISA systems were used for detection of the three viruses in sap extracts from infected plants some weak but significant (P=0.05 ) heterologous reactions occurred. The BYDV-PAV-IL DAS-ELISA system usually detected BWYV-CA and sometimes detected SDV-D; the BWYV-CA DAS-ELISA system never detected BYDV-PAV-IL and rarely detected SDV-D; the SDV-D DAS-ELISA system sometimes detected BYDV-PAV-IL and consistently detected BWYV-CA. 相似文献
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Improved detection of citrus psorosis virus using polyclonal and monoclonal antibodies 总被引：2，自引：0，他引：2
Citrus psorosis is a serious and widespread disease associated with citrus psorosis virus (CPsV), a novel filamentous negative-stranded virus in the genus Ophiovirus . Laborious and costly indexing on test plants has been the only routine diagnostic method available, but recently an antiserum usable in double antibody sandwich (DAS) ELISA has been prepared. Here, major improvements to the DAS-ELISA protocol, a new purification method, and production of two monoclonal antibodies (mabs) to CPsV, an IgG and an IgM are reported. A highly sensitive triple antibody sandwich (TAS) ELISA making use of the mabs is described. In glasshouse citrus the homologous virus was still detectable at a tissue dilution of 1/6250 in DAS and at 1/31250 in TAS-ELISA. Both the DAS and IgG mab-TAS formats detected all CPsV isolates so far tested (from Argentina, Italy, Lebanon, Spain and the USA). A few isolates were not detected by the IgM mab. 相似文献
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斑点免疫金和免疫金/银染色法检测烟草环斑病毒 总被引：11，自引：4，他引：7
在硝酸纤维素膜上进行的斑点免疫胶体金检测烟草环斑病毒技术已经建立.免疫金染色检测提纯病毒的灵敏度为25ng,检测病汁液可稀释10倍.使用免疫金/银染色则灵敏度更进一步提高. 相似文献
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ABSTRACT A panel of 11 different single-chain variable fragment antibodies (scFv) that bind to potato leafroll virus (PLRV) has been studied to assess each one's suitability as practical diagnostic tools. The scFv, previously obtained from naive phage display libraries, were expressed in Escherichia coli as fusion proteins. The fusion proteins comprised scFv joined to either the human light chain kappa constant domain (C(L)), an amphipathic helix (Zip), a combination of C(L) and Zip, or alkaline phosphatase (AP/S). The fusion proteins were tested for their ability to detect, or trap on enzymelinked immunosorbent assay (ELISA) plates, PLRV in extracts of infected potato leaves. The tests done with the different scFv fusion proteins were compared with a standard triple-antibody sandwich (TAS)-ELISA that employs a rabbit polyclonal antibody preparation to coat microtiter plates and a monoclonal antibody, SCR3, to detect PLRV. Of 11 scFvC(L) fusion proteins, 7 detected PLRV as readily as SCR3 when used as detecting antibodies in TAS-ELISA. The limit of detection of purified PLRV for the different scFvC(L) fusion proteins ranged from 250 to 5 ng/ml; that for SCR3 is 5 ng/ml. Of the 11 scFv, 4 cross-reacted with some other luteoviruses. Several scFvC(L) and scFvC(L)Zip fusion proteins trapped PLRV from extracts of infected potato leaves as effectively as the polyclonal antibody preparation. Four scFv fusion proteins were used in a stem print assay to detect PLRV, and the results were similar to those obtained in tests using SCR3. The scFvC(L) fusion proteins retained activity for at least 6 months at 4 degrees C, and all scFv fusion proteins were fully active on reconstitution after lyophilization. A fully recombinant ELISA was devised that detected PLRV in extracts of infected potato, with results comparable to those obtained using the standard TAS-ELISA. The advantages of using scFv fusion proteins for the routine detection of plant viruses include the ability to produce large quantities of reagents cheaply in bacterial fermenters and to incorporate them into standardized tests. 相似文献
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水稻条纹病毒单克隆抗体的制备及检测应用 总被引：15，自引：0，他引：15
用水稻条纹病毒(RSV)免疫的BALB/c小鼠脾细胞与SP2/0鼠骨髓瘤细胞融合,经筛选克隆,获得4株能稳定传代且分泌抗RSV单克隆抗体的杂交瘤细胞。各株单抗腹水的ELISA效价均在1:80000~1:5120000之间。Westernblot分析表明,4株单抗均与RSV的35kDa的外壳蛋白亚基有特异反应。建立了间接ELISA测定RSV的方法,4株单抗检测病汁液的稀释度能达到2560倍以上,与其它病毒无交叉反应。对江苏省部分县市的大田灰飞虱带毒率进行检测,结果显示灰飞虱的带毒率为12.5%~41.5% 相似文献
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A filamentous virus isolated from a sugar-beet plant showing systemic mosaic collected in South Kazakhstan was identified as an isolate of beet mosaic virus (BMV-K). BMV-K was transmitted by the green peach aphid Myzus persicae in a non-persistent manner, and by sap inoculation to 11 out of 19 species from seven families tested. The virus could not be transmitted to Nicotiana tabacum, N. debneyi, N. glutinosa and N. clevelandii, cither mechanically or with M. persicae. The thermal inactivation point of BMV-K in sugar-beet sap was 55-60 C, dilution end point 1:1000 and longevity in vitro 2 days at 20 C. A purification procedure produced 1-5-3 mg of purified virus from 100 g of infected Stellaria media plants. Purified virus contained a single protein species of molecular weight 34 700 Da. In ELISA tests, BMV-K reacted positively with BMV-specifc antisera obtained from Japan. Germany and Portugal. By competitive DAS- ELISA, the virus isolate was shown to be closely serologically related to all the three isolates of BMV, and very distantly related to bean yellow mosaic and soy bean mosaic viruses. 相似文献