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Journal of Chinese Pharmaceutical Sciences ›› 2019, Vol. 28 ›› Issue (11): 770-777.DOI: 10.5246/jcps.2019.11.073

• Original articles • Previous Articles     Next Articles

Construction of a phage displayed library based on a lipocalin scaffold and preliminary screening of anticalins with specificity for the FcεRI-α receptor

Hua Peng1, Jinkui Ma2, Jie Cheng1, Chengzhi Huang1, Hongbin Zhang2*   

  1. 1. Department of Otorhinolaryngology, General Hospital of Southern Theater Command, PLA, Guangzhou 510010, China
    2. Department of Medical Research, General Hospital of Southern Theater Command, PLA, Guangzhou 510010, China
  • Received:2019-08-15 Revised:2019-10-17 Online:2019-12-01 Published:2019-10-28
  • Contact: Tel.: +86-20-88653415, E-mail: zhangwater@tom.com
  • Supported by:

    The Science and Technology Project Foundation of Guangzhou, China (Grant No. 201604020106) and Natural Science Foundation of Guangdong Province (Grant No. 1814050002837).

Abstract:

The primers were designed according to the gene sequence of lipocalin protein family, and the gene sequence containing random mutation protein was obtained by overlapping extension of PCR. The random mutation lipocalin library was constructed using phagemid expression vector. Lipocalin library was screened by subtracted screening of NSF60 cells and affinity screening of mast cells, and the lipocalin secondary library binding to mast cells was obtained. Then the lipocalin secondary library was enriched and screened with FcεRI-α receptor protein as target molecule, and specific binding phages were eluted. After three rounds of screening, eight recombinant phage clones were randomly selected from elution clones of the third round. ELISA assay showed that three anticalin molecules could specifically bind to the FcεRI-α receptor of mast cells. These results may provide some candidate biological molecules for the development of blocking drugs of mast cell FcεRI-α receptor, and also lay the foundation for the development of biological small molecule drugs to treat IgE associated allergic diseases.

Key words: Lipocalin, FcεRI-&alpha, receptor, Anticalin molecules, Phage display, Mast cell

CLC Number: 

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