Polymer latexes for cell-resistant and cell-interactive surfaces
β Scribed by Banerjee, P. ;Irvine, D. J. ;Mayes, A. M. ;Griffith, L. G.
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 504 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0021-9304
No coin nor oath required. For personal study only.
β¦ Synopsis
Novel polymer latexes were prepared that can be applied in several ways for the control and study of cell behavior on surfaces. Acrylic latexes with glass transitions ranging from -30 to 100Β°C were synthesized by dispersion polymerization in a water and alcohol solution using an amphiphilic comb copolymer as a stabilizing agent. The comb had a poly(methyl methacrylate) backbone and hydrophilic poly(ethylene glycol) (PEG) side chains, which served to stabilize the dispersion and create a robust hydrophilic coating on the final latex particles. The end groups of the comb stabilizer can be selectively functionalized to obtain latex particles with a controlled density of ligands tethered to their surfaces. Latexes were prepared with adhesion peptides (RGD) linked to the surface of the acrylic beads to induce attachment and spreading of cells. Coalesced films obtained from the RGD-bearing latex particles promoted attachment of WT NR6 fibroblasts, while films from unmodified latex particles were resistant to these cells. Additionally, RGD-linked beads were embedded in cell-resistant comb polymer films to create cell-interactive surfaces with discrete clustered-ligand domains. Cell attachment and morphology were seen to vary with the surface density of the RGDbearing latex beads.
π SIMILAR VOLUMES
We report a novel combinatorial methodology for characterizing the effects of polymer surface features on cell function. Libraries containing hundreds to thousands of distinct chemistries, microstructures, and roughnesses are prepared using composition spread and temperature gradient techniques. The
Densely crosslinked semi-interpenetrating polymer networks (semi-IPNs) of poly(ethy1ene glycol) (PEG) were synthesized by photopolymerizing a melt of PEG of various molecular weights and end-group functionalities in neat trimethylolpropane triacrylate (TMPTA). Increasing the molecular weight of PEG
Results of the kinetics of adhesion of granulocytes as well as fresh and glutaraldehydefixed erythrocytes, suspended in Hanks Balanced Salt Solution (HBSS; pH 7.2, ionic strength of 0.15) to various polymeric substrates are presented. Cell adhesion increases rapidly initially and reaches a plateau v