中国寄生虫学与寄生虫病杂志 ›› 2004, Vol. 22 ›› Issue (2): 11-105.

• 实验报道 • 上一篇    下一篇

从噬菌体十二肽库筛选旋毛虫抗原模拟表位

潘虹,姜昌富,李天群,雷家慧,时红波,魏兰英
  

  1. 华中科技大学同济医学院病原生物学系,武汉 430030(潘虹;姜昌富;雷家慧;时红波),湖北民族学院病原生物学系,恩施 445000 (李天群);华中科技大学同济医学院病原生物学系,武汉 430030(魏兰英)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-04-30 发布日期:2004-04-30

Screening of Mimic Epitopes of Trichinella spiralis Antigen from Phage 12-mer Peptide Library

PAN Hong,JIANG Chang-fu,LI Tian-qun,LEI Jia-hui,SHI Hong-bo,WEI Lan-ying
  

  1. Department of Pathogenic Biology,Tongji Medical College,Huazhong University of Science and Technology,Wuhan,430030,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-04-30 Published:2004-04-30

摘要:   目的 从噬菌体肽库筛选旋毛虫抗原的模拟表位 ,为研究和开发新的旋毛虫病诊断抗原提供实验依据。方法 以纯化旋毛虫病患者血清免疫球蛋白(Ts IgG)对噬菌体十二肽库进行5轮筛选 ,随机挑选24个克隆 ,通过ELISA选取吸光值(A)较高的6个克隆 (T1~T6) ,并检测其敏感性和特异性。 结果 T1~T6敏感性与旋毛虫幼虫抗原(TsA)相同(阳性率为100%,P>0.05) ,特异性与TsA无明显差异 (阴性率为0~40%,P>0.05),其中T3,T6与并殖吸虫病患者血清无交叉反应 ,特异性高于TsA(P<0.05),T6与日本血吸虫病患者血清无交叉反应 ,特异性亦高于TsA(P<0.05)。 结论 利用噬菌体十二肽库筛选到旋毛虫抗原模拟表位

关键词: 旋毛虫, 旋毛虫病, 噬菌体, 肽库

Abstract:  Objective To screen special mimic epitopes of Trichinella spiralis antigen from peptide library for exploring new diagnostic antigens. Methods Ts-IgG purified from serum of trichinosis patients was used to screen the phage 12-mer peptide library for 5 rounds. 24 clones were picked out randomly to detect the immunoactivity. The sensitivity and specificity of the 6 clones (T1-T6) whose A values were higher than others were tested by ELISA. Results The sensitivity of the clones T1-T6 was the same with larval antigen of Trichinella spiralis (TsA) (positive rate: 100%, P>0.05), and there was no difference in specificity between T1-T6 and TsA (negative rate: 0-40%, P>0.05); T3 and T6 did not react with sera from patients of paragonimiasis, showing higher specificity than TsA(P<0.05); T6 did not react with sera from patients of schistosomiasis, also showing higher specificity than TsA(P<0.05). Conclusion The mimic antigenic epitopes of Trichinella spiralis have been successfully obtained by screening phage 12-mer peptide library.

Key words: Trichinella spiralis, trichinosis, phages, peptide library