Cellular response to phase-separated blends of tyrosine-derived polycarbonates.

Journal Article (Journal Article)

Two-dimensional thin films consisting of homopolymer and discrete compositional blends of tyrosine-derived polycarbonates were prepared and characterized in an effort to elucidate the nature of different cell responses that were measured in vitro. The structurally similar blends were found to phase separate after annealing with domain sizes dependent on the overall composition. The thin polymer films were characterized with the use of atomic force microscopy (AFM), water contact angles, and time-of-flight secondary ion mass spectrometry (TOF-SIMS) and significant changes in roughness were measured following the annealing process. Genetic expression profiles of interleukin-1beta and fibronectin in MC3T3-E1 osteoblasts and RAW 264.7 murine macrophages were measured at several time points, demonstrating the time and composition-dependent nature of the cell responses. Real-time reverse transcriptase polymerase chain reaction (RT-PCR) depicted upregulation of the fibronectin gene copy numbers in each of the blends relative to the homopolymers. Moreover, the interleukin-1beta expression profile was found to be compositionally dependent. The data suggest strongly that optimal composition and processing conditions can significantly affect the acute inflammatory and extracellular matrix production responses.

Full Text

Duke Authors

Cited Authors

  • Bailey, LO; Becker, ML; Stephens, JS; Gallant, ND; Mahoney, CM; Washburn, NR; Rege, A; Kohn, J; Amis, EJ

Published Date

  • March 2006

Published In

Volume / Issue

  • 76 / 3

Start / End Page

  • 491 - 502

PubMed ID

  • 16278865

Pubmed Central ID

  • PMC2996268

Electronic International Standard Serial Number (EISSN)

  • 1552-4965

International Standard Serial Number (ISSN)

  • 1549-3296

Digital Object Identifier (DOI)

  • 10.1002/jbm.a.30527


  • eng