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体外对分泌单克隆免疫球蛋白M抗绵羊红细胞抗体的慢性淋巴细胞白血病淋巴细胞的独特型抑制

In vitro idiotypic suppression of chronic lymphocytic leukemia lymphocytes secreting monoclonal immunoglobulin M anti-sheep erythrocyte antibody.

作者信息

Bona C A, Fauci A S

出版信息

J Clin Invest. 1980 Mar;65(3):761-7. doi: 10.1172/JCI109724.

Abstract

A patient with chronic lymphocytic leukemia was found to have B cells with surface immunoglobulin (Ig)M manifesting anti-sheep erythrocyte (SRBC) specificity together with a high titer serum monoclonal anti-SRBC IgM antibody. By immunizing a sheep with the monoclonal IgM antibody, followed by multiple absorptions against normal human IgM, an anti-idiotype (Id) antibody was obtained. The serum IgM anti-SRBC antibody was then demonstrated to share the same idiotypic determinants with the surface IgM with anti-SRBC specificity on the patient's B cells. The anti-Id antibody suppressed the spontaneous secretion of anti-SRBC antibody as well as the pokeweed mitogen-induced anti-SRBC antibody production as measured by a hemolysis-in-gel plaque-forming cell assay. In contrast, pokeweed mitogen-induced anti-SRBC plaque-forming cell responses of normal individuals were not suppressed by the anti-Id antibody. Thus, this study demonstrates in vitro suppression of human B-cell function by anti-Id antibody.

摘要

一名慢性淋巴细胞白血病患者被发现其带有表面免疫球蛋白(Ig)M的B细胞表现出抗绵羊红细胞(SRBC)特异性,同时伴有高滴度血清单克隆抗SRBC IgM抗体。用该单克隆IgM抗体免疫一只绵羊,随后多次吸收正常人IgM,获得了一种抗独特型(Id)抗体。结果证明,血清IgM抗SRBC抗体与患者B细胞上具有抗SRBC特异性的表面IgM具有相同的独特型决定簇。通过凝胶溶血空斑形成细胞试验检测,抗Id抗体抑制了抗SRBC抗体的自发分泌以及商陆有丝分裂原诱导的抗SRBC抗体产生。相比之下,抗Id抗体并未抑制正常人的商陆有丝分裂原诱导的抗SRBC空斑形成细胞反应。因此,本研究证明了抗Id抗体在体外对人B细胞功能的抑制作用。

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