摘要
目的:制备小鼠抗人精子蛋白SP22单克隆抗体并鉴定其特异性。方法:用BL/21菌表达的SP22作抗原免疫BALB/c小鼠,用有限稀释法筛选分泌SP22单克隆抗体(M cAb)的杂交瘤细胞株,制备单克隆抗体,通过ELISA技术,W estern印迹方法鉴定其敏感性及特异性。免疫组化法探讨SP22在人精子表面的分布与定位。结果:获得3株稳定分泌SP22单克隆抗体的杂交瘤细胞株,其细胞培养液浓缩上清和混合腹水的效价分别为1∶1000和1∶3 200,抗体亲和力为1.0×107L/mol,小鼠IgG亚类均为IgG1,W estern印迹结果显示该抗体能特异性识别人精子SP22,免疫组化结果显示SP22主要定位于精子的顶体部位。结论:用杂交瘤技术制备的抗人SP22单克隆抗体具有高的效价和特异性,并且能特异地与人精子表面的SP22蛋白结合。
Objective： To prepare monoclonal antibodies of mice anti-human sperm protein 22 （SP22） and to identify their specificities. Methods ： BALB/c mice were immunized with human SP22, monoclonal antibodies were prepared by hybridoma technique and the sensitivity and specificity of SP22 McAb were investigated by ELISA and Western-blot assay, respectively. The distribution of human SP22 in sperm were shown by immunohistochemistry. Results ： Three strains of hybridoma cells were obtained, with the affinity constant （K） of 1.0 × 10^7 L/mol and the titers were 1 ： 103 and 1 ： 3 200 in the mixed supernatant of cell cultures and abdominal dropsy, respectively. IgG isotype of the antibody was identified as IgG1. Western blot demonstrated that there was a specific recognition between human SP22 and the obtained monoclonal antibody. Immunohistochemistry displayed that human SP22 mainly distributed on the acrosome surface of human sperm. Conclusion ： The monoclonal antibodies of anti-human 22 was prepared by the technique of hybridoma cell has higher titer and specificity, which can combine specially with the SP22 protein on the surface of human sperm.
出处
《中华男科学杂志》
CAS
CSCD
2006年第4期303-307,共5页
National Journal of Andrology
基金
江苏省医学重点学科基金(苏卫科教[2001]34号)
