畜牧兽医学报 ›› 2008, Vol. 39 ›› Issue (4): 488-493.doi:

• 基础兽医 • 上一篇    下一篇

鸡源Bursin-ScFv噬菌体展示文库的构建及初步筛选

邬向东,曲悦,谌南辉,王萍,何后军   

  1. 1.江西农业大学动物科学技术学院,南昌 330045;2.辽宁医学院,锦州 121001
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-04-24 发布日期:2008-04-24

Construction and Screening of ScFv Phage Display Library of the Bursin Antiidiotype Antibody from Chicken Immunized with Anti-Bursin McAb

WU Xiang-dong,QU Yue,CHEN Nan-hui,WANG Ping,HE Hou-jun   

  1. 1. College of Animal Science and Technology, Jiangxi Agricultural University, Nanchang 330045, China; 2. Liaoning Medical University, Jinzhou 121001, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-04-24 Published:2008-04-24

摘要: 本研究利用抗三肽囊素(Bursin)单克隆抗体免疫SPF来航鸡,获得产生抗独特型抗体的脾细胞,从中提取总RNA,经反转录合成cDNA第一链。以cDNA第一链为模板,根据来航鸡IgG抗体重链(VH)、轻链(VL)可变区基因FR设计引物,进行PCR扩增。在体外扩增出该抗体的可变区VH和VL基因(大小分别约为370和320 bp)。通过重叠延伸反应(SOE),以(Gly4Ser)3为连接肽,将VH和VL基因连接成为VH-Linker-VL ScFv,将ScFv DNA与噬菌粒载体pHEN1的连接产物转化于大肠杆菌TG1,经辅助噬菌体M13K07感染后,获得重组的鸡源抗三肽囊素独特型抗体全套单链噬菌体抗体库。并测得该库容量约为5×105,噬菌体中ScFv基因的插入率为80%,用辅助噬菌体援救后,得到滴度为1011 PFU/mL的初级噬菌体抗体库。用抗Bursin单克隆抗体(2F9-4/HU2)进行4轮“吸附洗脱扩增”的淘筛,出现特异性富集。经ELISA、动物试验表明所筛选的5个阳性克隆可与抗Bursin单克隆抗体(2F9-4/HU2)特异性结合,并能促进抗体的生产。

Abstract: By using RT-PCR, the chicken heavy chain variable region gene(VH, 370 bp) and light chain variable region gene (VL, 320 bp)were amplified from spleen cells of chicken immunized with McAb against bursin, subsequently the acquired segments were assembled together to get ScFv gene through SOE by using (Gly4Ser)3 as a linker. The acquired ScFv genes were transformed into E.coli TG1 and amplified with co-infection of helper phage M13K07 to obtain chicken ScFv library of Bursin anti-idiotype antibody. Results of ELISA,animal experiment confirmed that five positive clones screened from the library can combine with anti-bursin antibody.