乙型肝炎表面抗体的抗独特型研究

Studies on the anti-idiotypic antibodies against anti-HBs

用 HBsAg/a 决定簇的7A_4单克隆抗体(McAb_1)复合物,免疫同系 BALB/C 小鼠,制备了高效价抗独特型(Ab_2)血清和两株抗独特型 McAb(McAb_2).Ab_2血清和 McAb_2都能识别7A_4McAb_1的互补位独特型.Ab_2血清中有与异种(豚鼠、驴、兔和羊)抗—HBs 结合的抗体,两株 McAb 不能与异种抗-HBs结合的抗体,两株 McAb 不能与异种抗-HBs 结合,属非内影像 Ab_2γ.研究表明,HBsAg/a 决定簇的 McAb_1有不同的互补位,McAb_2可作为一种生物探针,用于区别 McAb_1的互补位.

Hightiter anti-idiotypic antibodies(Ab_2)sera and two monoclonal anti-idiotypic antibodies (McAb_2)were repared by immunizating syngeneic BALB/c mice wth a complex of 7A_4 monoclonalantibody(McAb_1)against the a eterminant of the Hepatitis B Surface antiger(HBsAg)。Both Ab_2sera and McAb_2 recognize the idiotype of aratope n 7A_4McAb_1.Ab_2 sera contain the antibodiesbinding specially to anti-HBs from other species(guinea pig、onkey、rabbit and goat)and the twoMcAb_2 can not bind to these anti-HBs.Therefore it is thought that the two McAb_ re noninternalimage(Ab_2γ)anti-idiotypic antibodies,this study proves that the McAb_1 against he eterminantof the HBsAg are different in their paratope,The McAb_2 can be used to stinguish the parotope onthe McAb_1 as a biological probe.