Abstract
Receptor ectodomain-based ligand traps are a new class of candidate therapeutics that can be optimized using protein engineering approaches that are built on an understanding of the interactions between natural receptors and their ligands. We present here a summary of our characterization of TGF-β ligand-receptor interactions using primarily surface plasmon resonance (SPR)-based biosensor analyses. The results of those studies lead us to hypothesize that artificial dimerization of TGF-β receptor ectodomains may provide a bridged-binding avidity effect that promotes stable binding and increased ligand trapping potency. We confirmed this by utilizing a de novo designed heterodimerizing coiled-coil peptide system to generate, and compare in a systematic manner, monomeric and dimeric versions of soluble TGF-β receptor ectodomains. Finally, we discuss how the potency and specificity of artificially dimerized receptor ectodomain-based traps may compare favorably with other classes of TGF-β pathway inhibitors.
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De Crescenzo, G., Chao, H., Zwaagstra, J., Durocher, Y., O’Connor-McCourt, M.D. (2008). Engineering TGF-β Traps: Artificially Dimerized Receptor Ectodomains as High-affinity Blockers of TGF-β Action. In: Jakowlew, S.B. (eds) Transforming Growth Factor-β in Cancer Therapy, Volume II. Cancer Drug Discovery and Development. Humana Press. https://doi.org/10.1007/978-1-59745-293-9_40
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DOI: https://doi.org/10.1007/978-1-59745-293-9_40
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