Aptamer-Directed Conjugation of DNA to Therapeutic Antibodies

被引:14
|
作者
Skovsgaard, Mikkel B. [1 ]
Mortensen, Michael R. [1 ]
Palmfeldt, Johan [2 ]
Gothelf, Kurt, V [1 ]
机构
[1] Aarhus Univ, Dept Chem, iNANO, Gustav Wieds Vej 14, DK-8000 Aarhus C, Denmark
[2] Aarhus Univ, Dept Clin Med, Palle Juul Jensens Blvd 99, DK-8200 Aarhus N, Denmark
基金
新加坡国家研究基金会;
关键词
TRANSFERRIN; PROTEINS; RECEPTOR; RNA;
D O I
10.1021/acs.bioconjchem.9b00363
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
A method for aptamer directed conjugation of DNA to therapeutic antibodies has been developed. In the method, an antibody selective aptamer binds to a specific site in the constant domain of human IgG1 antibodies and is used for both templated and direct conjugation to the antibodies. Through optimization of the design and reaction conditions, the antibody-DNA conjugates could be produced efficiently using equal stoichiometry of protein and DNA. Three different antibodies were evaluated, and the conjugates were characterized by anion exchange chromatography and SDS-PAGE. The conjugation sites for one of the antibodies were determined by MS/MS analysis of the digested conjugate. The antibody-DNA conjugate was also tested for receptor binding on cell surfaces showing retained binding.
引用
收藏
页码:2127 / 2135
页数:9
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