Nové vazebné proteiny odvozené od malých proteinových domén cílené na diagnosticky využitelné terče

Vaňková, Lucie

The rapid development of the gene engineering techniques, especially methods for in vitro directed evolution and combinatorial mutagenesis, has triggered the generation of new binding agents to almost any antigen of interest as an alternative to broadly used antibodies. These so-called non-Ig scaffolds are often derived from proteins with useful biophysical properties. While the therapeutic market is still dominated by monoclonal antibodies, the easy option of desired customization of non-Ig binders by conventional methods of gene engineering predestine them largely for the use in the diagnostic area. The ABD scaffold, derived from a three-helix bundle of albumin-binding domain of streptococcal protein G, represents one of the small non-Ig scaffolds. In our laboratory, we have established a highly complex combinatorial library developed on the ABD scaffold. This ABD scaffold-derived library was used to generate unique binders of human prostate cancer (PCa) biomarkers PSP94, KLK2, KLK11 for the more precise diagnosis of PCa. The second part of the thesis describes the generation of ABD-derived binders selectively recognizing different phenotypes of circulating tumor cells as a binding component of the cell capture zone of microfluidic chip for lung adenocarcinoma diagnosis. Beside this already...

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