抗沙眼衣原体主要外膜蛋白种特异性单克隆抗体

Species-specific Monoclonal Antibodies against the Major Outer Membrane Protein(MOMP) of Chlamydia Trachomatis

用人工合成沙眼衣原体主要外膜蛋白（ＭＯＭＰ）氨基端１／４肽链免疫８周龄雄性ＢＡＬＢ／ｃ小鼠３只，第１４天用Ｌ１／４４０／Ｂｕ原体加强免疫，第２４天将免疫反应良好的１只小鼠脾细胞与ＮＳ－１瘤细胞融合。用１／４ＭＯＭＰ和Ｌ１原体抗原包被的聚丙乙烯板检测上清中抗体，淘汰与鹦鹉热衣原体种（ＥＡＥ株）、肺炎衣原体种（ＡＴＣＣＶＲ１３１０株）以及正常组织培养细胞（ＢＧＭＫ）有交叉反应的克隆，最后得到４株抗沙眼衣原体特异性单克隆抗体（ＭＡｂｓ），其抗体属ＩｓＧ１和ＩｇＧ２ａ亚类。微量免疫荧光试验（ｍｉｃｒｏ－ＩＦ）发现４株ＭＡｂｓ均与本实验室制备的沙眼衣原体Ｌ１、Ｌ２、Ａ、Ｂ、Ｃ、Ｅ原体及Ｌ２包涵体抗原发生反应，并与沙眼衣原体所有１５个标准血清型结合，其腹水ＭＡｂｓ滴度≥１：１２８００。免疫印迹试验显示４株ＭＡｂｓ均与沙眼衣原体分子量为４００００的ＭＯＭＰ反应。

The synthesized one quarter N-terminal MOMP of C. trachomatis was used for primary immunization of three male BALB/c mice(8 weeks of age), and the boost with C. trachomatis L1/440/Bu elementary bodies(EBs) was followed on day 14. Spleen cells from one mouse with good response of immunization were fused with murine myeloma NS-1 cells on day 24. The hybrid cell suspension was seeded into the wells of 96-well microtest plates which contained macrophage feeder layers. Anti-chlamydial antibodies in culture fluids were screened by ELISA with 1/4 MOMP & L1 EBs coated 96-well trays. Positive wells were cloned by limiting dilution. Four clones which secreted immunoglobulin G1&G2a class were obtained after elimination of those clones that produced antibodies to C. psittaci strain EAE,C. pneumoniae strain ATCC VR1310 and uninfected BGMK cells. In micro-IF test, we found that the all four clones of MAbs reacted with our laboratory prepared L1,L2 ,A,B,C, EEBs, L2 tissue culture inclusions, as well as the EBs of all 15 standard serovars of C. trachomatis. The titers of their ascites were more than 1: 1 2800 in micro-IF test. It was shown that the four clones of MAbs reacted predominantly with 40000 MOMP of C. trachomatis L1 in Western blot.