title: Synthesis and evaluation of bivalent, peptidomimetic antagonists of the αvβ3 integrins.
abstract: Targeting the integrin α(v)β(3) by directly interfering with its function is considered to be an effective and non-cytotoxic strategy for the treatment of tumor. In this study, a series of bivalent analogs of peptidomimetic integrin antagonists IA 1 and IAC 2 were designed, synthesized, and evaluated for their ability to inhibit the integrin α(v)β(3). All the bivalent ligands exhibited increased potency compared to that of their monomeric counterparts for the integrin α(v)β(3) with low nanomolar range binding affinity. The best bivalent ligand 6 tested in the series has an IC(50)=0.09 nM evaluated by ELISA assay. We conclude that multivalency is providing a useful template for the development novel integrin α(v)β(3) antagonists as potential therapeutics.
authors.affiliation: Department of Radiology, The Methodist Hospital Research Institute, Houston, TX 77030, United States.
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.forename: Gouri S
authors.initials: GS
authors.lastname: Jas
authors.forename: Guoting
authors.initials: G
authors.lastname: Qin
authors.forename: King
authors.initials: K
authors.lastname: Li
authors.forename: Zheng
authors.initials: Z
authors.lastname: Li
mesh_terms: D039302:Integrin alphaVbeta3 / Q000737:chemistry*; D008024:Ligands; D018716:Molecular Mimicry; D010455:Peptides / Q000037:antagonists & inhibitors*
chemical_list: D039302:Integrin alphaVbeta3; D008024:Ligands; D010455:Peptides