Radiopaque, iodine functionalized, phenylalanine-based poly(ester urea)s.

Journal Article (Journal Article)

The synthesis and characterization of iodine-functionalized phenylalanine-based poly(ester urea)s (PEUs) are reported. 4-Iodo-L-phenylalanine and L-phenylalanine were separately reacted with 1,6-hexanediol to produce two monomers, bis-4-I-L-phenylalanine-1,6-hexanediol-diester (1-IPHE-6 monomer) and bis-L-phenylalanine-1,6-hexanediol-diester (1-PHE-6 monomer). By varying the feed ratio of the 1-IPHE-6 and 1-PHE-6 monomers, the copolymer composition was modulated resulting in a wide variation in thermal, mechanical and radiopacity properties. Microcomputed tomography (μ-CT) projections demonstrate that increasing iodine content results in greater X-ray contrast. Compression tests of dry and wet porous scaffolds indicate that the poly(1-IPHE-6)0.24-co-poly(1-PHE-6)0.76 material results in the highest compression modulus. MC3T3 cell viability and spreading studies show PEUs are nontoxic to cells. As most medical device procedures require placement verification via fluoroscopic imaging, materials that possess inherent X-ray contrast are valuable for a number of applications.

Full Text

Duke Authors

Cited Authors

  • Li, S; Yu, J; Wade, MB; Policastro, GM; Becker, ML

Published Date

  • February 2015

Published In

Volume / Issue

  • 16 / 2

Start / End Page

  • 615 - 624

PubMed ID

  • 25575022

Electronic International Standard Serial Number (EISSN)

  • 1526-4602

International Standard Serial Number (ISSN)

  • 1525-7797

Digital Object Identifier (DOI)

  • 10.1021/bm501669u


  • eng