Cellular signaling and gene expression profiles evoked by a bivalent macrocyclic peptide that serves as an artificial MET receptor agonist

Sci Rep. 2018 Nov 7;8(1):16492. doi: 10.1038/s41598-018-34835-4.

Abstract

Non-native ligands for growth factor receptors that are generated by chemical synthesis are applicable to therapeutics. However, non-native ligands often regulate cellular signaling and biological responses in a different manner than native ligands. Generation of surrogate ligands comparable to native ligands is a challenging need. Here we investigated changes in signal transduction and gene expression evoked by a bivalent macrocyclic peptide (aMD5-PEG11) capable of high-affinity binding to the MET/hepatocyte growth factor (HGF) receptor. Binding of aMD5-PEG11 to the MET extracellular region was abolished by deletion of the IPT3-IPT4 domain, indicating the involvement of IPT3-IPT4 in the binding of aMD5-PEG11 to the MET receptor. aMD5-PEG11 induced dimerization and activation of the MET receptor and promoted cell migration that was comparable to induction of these activities by HGF. Signal activation profiles indicated that aMD5-PEG11 induced phosphorylation of intracellular signaling molecules, with a similar intensity and time dependency as HGF. In 3-D culture, aMD5-PEG11 as well as HGF induced epithelial tubulogenesis and up-regulated the same sets of functionally classified genes involved in multicellular organism development. Thus, a non-native surrogate ligand that consisted of a bivalent macrocyclic peptide can serve as an artificial MET receptor agonist that functionally substitutes for the native ligand, HGF.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line
  • Computational Biology / methods
  • Gene Expression Profiling
  • Gene Expression Regulation / drug effects*
  • Molecular Structure
  • Peptides, Cyclic / chemistry
  • Peptides, Cyclic / pharmacology*
  • Protein Binding
  • Protein Interaction Domains and Motifs
  • Protein Multimerization
  • Proto-Oncogene Proteins c-met / agonists*
  • Proto-Oncogene Proteins c-met / chemistry
  • Receptors, Artificial / agonists*
  • Receptors, Artificial / chemistry
  • Signal Transduction / drug effects*
  • Transcriptome*

Substances

  • Peptides, Cyclic
  • Receptors, Artificial
  • Proto-Oncogene Proteins c-met