In the present study, an indirect assay was employed to investigate 5 anti-gastric cancer monoclonal antibodies for their cytotoxic potential as ricin A chain-containing immunotoxins. The tumor cell, were treated with...In the present study, an indirect assay was employed to investigate 5 anti-gastric cancer monoclonal antibodies for their cytotoxic potential as ricin A chain-containing immunotoxins. The tumor cell, were treated with dilutions of tested antibody followed by ricin A chain coupled to goat anti-mouse immunoglobulin. The cytotoxic effect was determined with tetrazolium colorimetric assay. The results showed that among the 5 antibodies chosen, MGb2 and MG7 could be well used for preparation of effective A chain immunotoxins.展开更多
Some monoclonal antibodies （mAbs） could inhibit infection by HIV-1. In this study, four mAbs against HIV-1 gp41 were prepared in mice. All four mAbs could bind to the recombinant soluble gp41 and recognize the nativ...Some monoclonal antibodies （mAbs） could inhibit infection by HIV-1. In this study, four mAbs against HIV-1 gp41 were prepared in mice. All four mAbs could bind to the recombinant soluble gp41 and recognize the native envelope glycoprotein gp160 expressed on the HIV-Env^＋ CHO-WT cell in flow cytometry analysis. Interestingly, the results show that all four mAbs purified by affinity chromatography could inhibit HIV-1 Env-mediated membrane fusion （syncytium formation） by 40%-60% at 10 μg/mL, which implies potential inhibitory activities against HIV-1.展开更多
目的：建立Der p 2（屋尘螨Ⅱ类变应原）杂交瘤细胞株，并对其分泌的Der p 2单克隆抗体进行鉴定．方法：用重组Der p 2蛋白作为免疫原，免疫BALB／c小鼠，取脾细胞与Sp2／0小鼠骨髓瘤细胞融合，经筛选和3次克隆化，制备出单克隆抗体．...目的：建立Der p 2（屋尘螨Ⅱ类变应原）杂交瘤细胞株，并对其分泌的Der p 2单克隆抗体进行鉴定．方法：用重组Der p 2蛋白作为免疫原，免疫BALB／c小鼠，取脾细胞与Sp2／0小鼠骨髓瘤细胞融合，经筛选和3次克隆化，制备出单克隆抗体．采用间接ELISA法、Western blot法确定单克隆抗体的免疫球蛋白的类型和亚类、相对亲和力、特异性，对单克隆抗体进行鉴定．结果：获得3株能稳定分泌高效价Der p 2单克隆抗体的杂交瘤细胞株，186为IgG1类，1G11、4B1为IgG2a类．间接ELISA法检测细胞上清效价为10^4～10^5，腹水效价为10^5～10^6．Western blot试验证明3株单抗与Der p 2蛋白均有特异性反应，结论：成功制备了3株抗Der p 2的单克隆抗体，均具有良好的特异性和亲和力，为进一步建立Der p 2蛋白检测和纯化的方法奠定了基础．展开更多
文摘In the present study, an indirect assay was employed to investigate 5 anti-gastric cancer monoclonal antibodies for their cytotoxic potential as ricin A chain-containing immunotoxins. The tumor cell, were treated with dilutions of tested antibody followed by ricin A chain coupled to goat anti-mouse immunoglobulin. The cytotoxic effect was determined with tetrazolium colorimetric assay. The results showed that among the 5 antibodies chosen, MGb2 and MG7 could be well used for preparation of effective A chain immunotoxins.
基金Supported by the National Natural Science Foundation of China (No. 30270286)
文摘Some monoclonal antibodies （mAbs） could inhibit infection by HIV-1. In this study, four mAbs against HIV-1 gp41 were prepared in mice. All four mAbs could bind to the recombinant soluble gp41 and recognize the native envelope glycoprotein gp160 expressed on the HIV-Env^＋ CHO-WT cell in flow cytometry analysis. Interestingly, the results show that all four mAbs purified by affinity chromatography could inhibit HIV-1 Env-mediated membrane fusion （syncytium formation） by 40%-60% at 10 μg/mL, which implies potential inhibitory activities against HIV-1.
文摘目的：建立Der p 2（屋尘螨Ⅱ类变应原）杂交瘤细胞株，并对其分泌的Der p 2单克隆抗体进行鉴定．方法：用重组Der p 2蛋白作为免疫原，免疫BALB／c小鼠，取脾细胞与Sp2／0小鼠骨髓瘤细胞融合，经筛选和3次克隆化，制备出单克隆抗体．采用间接ELISA法、Western blot法确定单克隆抗体的免疫球蛋白的类型和亚类、相对亲和力、特异性，对单克隆抗体进行鉴定．结果：获得3株能稳定分泌高效价Der p 2单克隆抗体的杂交瘤细胞株，186为IgG1类，1G11、4B1为IgG2a类．间接ELISA法检测细胞上清效价为10^4～10^5，腹水效价为10^5～10^6．Western blot试验证明3株单抗与Der p 2蛋白均有特异性反应，结论：成功制备了3株抗Der p 2的单克隆抗体，均具有良好的特异性和亲和力，为进一步建立Der p 2蛋白检测和纯化的方法奠定了基础．
