Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (11): 3477.doi: 10.7503/cjcu20210292

• Review • Previous Articles     Next Articles

Research Progress on Improving the Binding Affinity of Aptamers through Chemical Modification

LIU Ke, JIN Yu, LIANG Jiangong, WU Yuan()   

  1. College of Science,Huazhong Agricultural University,Wuhan 430070,China
  • Received:2021-04-28 Online:2021-11-10 Published:2021-06-01
  • Contact: WU Yuan E-mail:yuanwu@mail.hzau.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21904046)

Abstract:

Aptamers are short single-stranded DNA or RNA oligonucleotides obtained through in vitro systematic evolution of ligands by exponential enrichment(SELEX). They possess high specificity and high affinity equivalent to or better than those of antibody. Moreover, they have been studied widely in food, environment, and biomedical fields due to many other advantages, such as wide range of targets, easy preparation, flexible and controllable modification, low immunogenicity, small batch variation, and easy storage. But so far, commercial applications of aptamers are still limited. Researchers have conducted numerous chemical modifications to enhance the performance of aptamers. This review focused on the non-covalent or covalent chemical modification of aptamers pre- and post-SELEX to increase the binding affinity of aptamer towards the target. It systematically summarized the research progress of chemical modification of aptamers in recent years and discussed the prospective of the future development.

Key words: Aptamer, Systematic evolution of ligands by exponential enrichment(SELEX), Chemical modification, Binding affinity

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