Five monoclonal antibodies（Mabs） to nuclear protein of avain influenza virus（AIV） were developed by syncretizing SP 2/0 and the spleen cells from BALB of mice immuized with H9 subtype AIV. Specificity of these Mab...Five monoclonal antibodies（Mabs） to nuclear protein of avain influenza virus（AIV） were developed by syncretizing SP 2/0 and the spleen cells from BALB of mice immuized with H9 subtype AIV. Specificity of these Mabs were identified by immunofluorescent assay（IFA） and enzyme linked immunosorbent assay （ELISA）. These five Mabs which were named as AIV-NP-2C3, AIV-NP-6A5, AIV-NP-3 H9, AIV-NP-7B4, AIV-NP-2H4 could react with all viruses of AIV-H9 strains in tests. The result of Western blotting showed that only the 60 ku protein antigen of AIV-H9 could be recognized by the Mabs but never recognized by New castle disease virus, REV and infectious bursa disease virus. The result of preliminary application showed that avian influenza viruses could be deetected bv Mabs in IFA and ELISA. All these Mabs will probably play important roles in preventing and monitoring avian influenza viruses.展开更多
基金浙江省科技厅公益技术研究社会发展项目(2014C33276)Fund program Public Technology Research and Social Development Project of Science Technology Department of Zhejiang Province
文摘目的：预测并鉴定人感染H7N9禽流感病毒血凝素（HA）蛋白的线性B淋巴细胞抗原表位及H7亚型的特异性。方法选取绍兴市人民医院提供的人感染H7 N9患者不同时间的三份血清样本和一份健康对照血清样本，采用TMHMM Sever v．2．0预测蛋白质胞外区，采用DNAStar Lasergene’ s Protean、BcePred和ABCpred预测其优势B淋巴细胞抗原表位，并用间接酶联免疫吸附试验（ ELISA）验证预测的B淋巴细胞抗原表位的免疫原性。使用Clustal X2．1软件将预测抗原表位与GenBank上H7N9和H1～H16亚型流感病毒HA蛋白的氨基酸序列进行多重序列比对以分析预测抗原表位的H7亚型特异性，采用Cn3D 4．3．1软件分析预测的线性B淋巴细胞抗原表位在H7N9禽流感病毒HA蛋白中的分布情况。结果 HA蛋白可能的B淋巴细胞表位位于胞外区N端的第172～183、363～380、452～472和第491～506四个区段。 ELISA结果表明，四个预测的B淋巴细胞表位均与已确诊患者血清发生阳性反应。多重序列比对结果发现第172～183和452～472区段与其他亚型氨基酸序列差异最大，可能具有更好的H7亚型特异性。 HA蛋白的三维结构进一步证明预测的四个B淋巴细胞抗原表位均位于HA蛋白表面。结论鉴定出了四个 HA蛋白线性B淋巴细胞抗原表位，其中第172～183和452～472区段具有更好的H7亚型特异性，可作为新型疫苗表位设计和H7抗原和抗体的特异性检测的依据。
基金Supported by the National Key Technologies Research and Develop-ment Program of China during the 10th Five-Year Plan Period(2004BA519A05)Technologies Research and Development Program of China during the 10th Five-Year Plan Period in Jiangsu Province(BE2002346).~~
文摘Five monoclonal antibodies（Mabs） to nuclear protein of avain influenza virus（AIV） were developed by syncretizing SP 2/0 and the spleen cells from BALB of mice immuized with H9 subtype AIV. Specificity of these Mabs were identified by immunofluorescent assay（IFA） and enzyme linked immunosorbent assay （ELISA）. These five Mabs which were named as AIV-NP-2C3, AIV-NP-6A5, AIV-NP-3 H9, AIV-NP-7B4, AIV-NP-2H4 could react with all viruses of AIV-H9 strains in tests. The result of Western blotting showed that only the 60 ku protein antigen of AIV-H9 could be recognized by the Mabs but never recognized by New castle disease virus, REV and infectious bursa disease virus. The result of preliminary application showed that avian influenza viruses could be deetected bv Mabs in IFA and ELISA. All these Mabs will probably play important roles in preventing and monitoring avian influenza viruses.
