At least three distinct B cell epitopes reside in the C‐terminal half of La protein, as determined by a recombinant DNA approach

At least three distinct B cell epitopes reside in the C‐terminal half of La protein, as determined by a recombinant DNA approach
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通过重组 DNA 方法确定,La 蛋白的 C 端一半存在至少三个不同的 B 细胞表位

DOI:
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发表时间:
1988
影响因子:
5.4
通讯作者:
R. Lührmann
R. Lührmann
中科院分区:
医学3区
文献类型:
--
作者:
A. Rauh;H. Hornig;R. Lührmann

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La抗原是一种核蛋白,是原发性干燥综合征患者血清中发现的自身抗体的主要靶抗原之一。因此,这种自身抗体的形成可能反映了这种疾病的基本免疫发病机制。重组DNA策略已被用于检查La蛋白的编码自身免疫B细胞表位的序列。我们从人肝脏cDNA文库中分离并鉴定了一个1.2 kb长的cDNA,该cDNA编码La蛋白的一个区域;该区域包含296个氨基酸,包括C末端。表达载体pEX中的重组DNA子文库由La cDNA的部分制备。通过免疫印迹和酶联免疫吸附试验检测单个融合蛋白与舍格伦综合征患者血清中所含抗La自身抗体反应的能力。通过这种方式,我们已经在La蛋白的C末端的一半中鉴定了至少三个不同的表位。检测的每种抗La血清都含有针对所有三种抗原区域的抗体。此外,大多数血清显示具有三种特异性的抗体滴度之间的相似比率。我们的数据表明,抗La自身抗体的产生可能是抗原驱动的。
The La antigen is a nuclear protein that is one of the major target antigens of autoantibodies found in the sera of patients with primary Sjögren's syndrome. The formation of such autoantibodies is therefore likely to reflect the basic immunopathogenesis of this disorder. A recombinant DNA strategy has been used to examine the La protein for sequences that encode autoimmunizing B cell epitopes. We have isolated and characterized a 1.2‐kb‐long cDNA from a human liver cDNA library encoding a region of the La protein; this region contains 296 amino acids, including the C terminus. A sub‐library of recombinant DNA in the expression vector pEX was made from portions of the La cDNA. Individual fusion proteins were tested by immunoblotting and enzyme‐linked immunosorbent assay for their ability to react with anti‐La autoantibodies contained in sera from patients with Sjögren's syndrome. In this way, we have identified at least three distinct epitopes in the C‐terminal half of the La protein. Every anti‐La serum tested contained antibodies against all three of the antigenic regions identified. Furthermore, most of the sera display similar ratios between the titers of antibodies with the three kinds of specificity. Our data suggest that the production of anti‐La autoantibodies may be antigen driven.
抗 SS-B (La) 自身抗体的亚类限制。
DOI: 10.1016/0090-1229(86)90128-5
发表时间: 1986
期刊: Clinical immunology and immunopathology
影响因子: --
作者:
Pearce,DC;Yount,WJ;Eisenberg,RA
通讯作者: Eisenberg,RA
DOI: 10.1073/pnas.78.2.805
发表时间: 1981-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
LERNER, MR;ANDREWS, NC;STEITZ, JA
通讯作者: STEITZ, JA
酪蛋白激酶——多能蛋白激酶。
DOI: --
发表时间: 1982
期刊: Current topics in cellular regulation
影响因子: --
作者:
Hathaway,GM;Traugh,JA
通讯作者: Traugh,JA
RNA 聚合酶 III 转录物 (4.5 I RNA) 中 La 蛋白结合位点的鉴定。
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Reddy,R;Henning,D;Tan,E;Busch,H
通讯作者: Busch,H
核仁 7-2 RNA 与两种不同自身抗原的顺序关联。
DOI: --
发表时间: 1983
期刊: The Journal of biological chemistry
影响因子: --
作者:
Hashimoto,C;Steitz,JA
通讯作者: Steitz,JA