EB病毒GST-Rta150融合蛋白单克隆抗体的制备和鉴定

目的制备EB病毒GST—Rta150融合蛋白的单克隆抗体并鉴定其特性．方法取经GST-Rta150融合蛋白免疫小鼠的脾细胞与SP2／0骨髓瘤细胞常规融合，依次进行阳性杂交瘤细胞株的筛选及亚克隆，接种杂交瘤细胞至小鼠腹腔，收集腹水并纯化。制备的单克隆抗体以琼脂双向扩散法鉴定抗体类及亚类．间接ELISA法测定抗体的效价，Western-blot检测抗体的特异性。结果获得一株稳定分泌抗GST-Rta150融合蛋白单克隆抗体的杂交瘤细胞株1A9，细胞培养上清效价为10^-3，腹水效价为10^-5，纯化的抗体效价为10^-6．经鉴定GST-Rta150融合蛋白单克隆抗体的亚类为IgGl。Western-blot结果显示此单克隆抗体能特异结合GST-Rta150融合蛋白．将杂交瘤细胞株在液氮中冻存3个月后复苏，其分泌的单克隆抗体效价不变。结论通过上述方法制备出来的单克隆抗体特异性强，稳定性好，为研究EB病毒立即早期基因产物Rta蛋白以及EB病毒相关疾病的诊断和治疗奠定了基础。

Preparation and Identification of Monoclonal Antibody Against Human GST-Rta150 Fusion Protein from Epstein-Barr Virus

Objective To prepare a monoclonal antibody (mAb) against GST-Rta150 fusion protein from EB virus and identify its characteristics. Methods BALB/c mouse was rendered immune by GST-Rta150 fusion protein; after that, the spleen cells of immunized mouse were taken to fuse with SP2/0 myeloma cells by a routine method. Then screening for positive hybridoma cells and subclone. Following that,the hybridoma cells were injected into the peritoneal cavity of BALB/c mouse. The ascites was collected and purified. The prepared mAb was identified by double immunodiffusion method for its subclass; in addition, its titer and specificity were identified by ELISA and Western-blot, respectively. Results One hybridoma cell line 1A9 which stably secreted mAb against GST-Rta150 fusion protein was obtained. Its Ig subclass belonged to IgG1, the titer degree of the purified mAb being 10~ -6 . Western-blot analysis showed the mAb could combine with GST-Rta150 fusion protein specially. The titer degree of this hybridoma cell line remained unchanged after frozen in liquid nitrogen (LN) for three months. Conclusion The mAb obtained by this method has powerful specificity and high stability .This work could serve as a foundation on which to study the Rta protein from EB virus and the diagnosis and treatment of EB virus correlated diseases.