伪狂犬病病毒闽A株单克隆抗体的制备与鉴定

Preparation and Identification of Monoclonal Antibody against Min-A Strain of Pseudorabies Virus(PRV)

本试验应用细胞杂交瘤技术,取健康BALB/c小鼠脾细胞与SP2/0骨髓瘤细胞进行细胞融合,经双抗体夹心ELISA筛选,4次有限稀释法克隆,得到2株能稳定分泌抗伪狂犬病病毒(PRV)的单克隆抗体杂交瘤细胞株:2C6E6、3D5F1。2株杂交瘤细胞培养上清的效价分别为1∶512、1∶1 024。鉴定结果显示这2株单克隆抗体分别为IgG1亚类和IgG2a亚类,杂交瘤细胞的平均染色体数目为84条。用纯化的PRV免疫经产健康的BALB/c小鼠,采用ELISA方法检测获得的腹水的效价分别为1∶1 638 400和1∶819 200。经检测这2株单克隆抗体与猪瘟病毒、猪繁殖与呼吸综合征病毒、猪细小病毒均不发生交叉反应,特异性良好。杂交瘤细胞连续培养30代,仍能稳定分泌抗PRV的单克隆抗体,说明这2株单克隆抗体的稳定性良好。本试验研究结果为PRV的快速诊断方法的建立奠定了理论基础。

With purified pseudorabies virus （PRV） to immune BALB/c mice, spleen ceils from imunized mice were fused with SP2/0 myeloma ceils by application of lymphocyte hybridoma technique, followed by double antibody sandwich ELISA screening, four times cloning by limiting dilution method to obtain two stable secreting anti-PRV monoclonal antibody hybridoma cell lines,2C6E6 and 3D5F1. After identification, these two monoelonal antibodies belonged to IgG1 and IgG2a subtypes, respectively, the average number of chromosomes of hybridoma cells was 84, ELISA titers of these two hybridoma cell culture supernatants and mouse ascites monoclonal anti- bodies were 1 ： 512 and 1 ： 1 638 400,1 ： 1 024 and 1 ： 819 200. These two monoclonal antibodies showed no cross-reaction with classical swine fever virus, porcine reproductive and respiratory sy- hdrome virus and porcine parvovirus,which indicated that they had high specificity. The hydrido- ma cells could passage for 30 generations which could still secrete monoclonal antibody against PRV,which indicated that these two monoclonal antibodies had good stability. The results in the assay laid the foundation for establishing rapid diagnostic methods of PRV.