Cloning and characterisation of TPO autoantibodies using combinatorial phage display libraries.

Cloning and characterisation of TPO autoantibodies using combinatorial phage display libraries.
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使用组合噬菌体展示库克隆和表征 TPO 自身抗体。

DOI:
10.3109/08916939409010651
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发表时间:
1994
期刊:
影响因子:
3.5
通讯作者:
D. Burton
D. Burton
中科院分区:
医学4区
文献类型:
--
作者:
J. Hexham;L. Partridge;J. Furmaniak;V. Petersen;J. Colls;C. Pegg;B. Rees Smith;D. Burton

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从桥本甲状腺患者甲状腺淋巴细胞RNA与甲状腺过氧化物酶(TPO)的自身抗体的高血清水平被用来构建噬菌粒载体pComb 3中的噬菌体展示抗体库。文库(100,000 cfu)编码IgG 1重链和κ轻链。在TPO包被的ELISA板上选择展示TPO抗体的噬菌体,产生富集TPO抗体Fab的表面表达的噬菌体群。随后分离出3种不同的TPO特异性Fab,其亲和力在10(9)摩尔-1的范围内。2个Fab识别TPO上相同或密切相关的表位,而第三个Fab识别不同的表位。这2个表位被淋巴细胞供体血清和一系列10个患者血清中的TPO自身抗体识别。可用的序列数据显示,几种非自身抗体和非甲状腺自身抗体使用与TPO自身抗体相同的V κ和VH种系基因。具有相同或相似表位特异性的TPO自身抗体的基因序列或基因家族使用之间似乎没有明确的关系。
Thyroid lymphocyte RNA from a Hashimoto patient with high serum levels of autoantibodies to thyroid peroxidase (TPO) was used to construct a phage display antibody library in the phagemid vector pComb3. The library (100,000cfu) encoded IgG1 heavy chains together with kappa light chains. Selection of the phages displaying TPO antibody on TPO-coated ELISA plates yielded a phage population enriched for surface expression of TPO antibody Fabs. 3 different Fabs specific for TPO were subsequently isolated with affinities in the region of 10(9) molar-1. 2 of the Fabs recognised the same, or closely related, epitopes on TPO whereas the third Fab recognised a different epitope. These 2 epitopes were recognised by TPO autoantibodies in the serum of the lymphocyte donor and a series of 10 patient sera. Available sequence data showed that several non-self antibodies and non-thyroid autoantibodies use the same V kappa and VH germline genes as TPO autoantibodies. There appeared to be no clear relationship between gene sequence or gene family usage by TPO autoantibodies of the same or similar epitope specificity.
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