Micropatterning proteins and cells on polylactic acid and poly(lactide-co-glycolide).
basic_science · Level V
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Abstract
Techniques for micropatterning proteins and cells on biomaterials are important in tissue engineering applications. Here, we present a method for patterning proteins and cells on poly(lactic acid) (PLA) and poly(lactide-co-glycolide) (PLGA) substrates that are routinely used as scaffolds in engineering tissues. Poly(oligoethyleneglycol methacrylate) (poly-OEGMA) or poly(oligoethyleneglycol methacrylate-co-methacrylic acid) (poly(OEGMA-co-MA)) was microcontact printed onto substrates to create cell resistant areas. Proteins adsorbed onto the unprinted regions whereas the polymer printed regions effectively repel non-specific protein adsorption. NIH 3T3 fibroblasts remain confined within the patterns on the PLGA and PLA films for up to 2 weeks and aligned their actin cytoskeleton along the line patterns. In comparison to unpatterned cells, fibroblasts confined within line-shaped patterns show fewer actin filaments. This method for controlling the spatial morphology and distribution of cells on synthetic biomaterials could have significant applications in tissue engineering.
Medical subject headings
- Biocompatible Materials
- Cell Adhesion
- Lactic Acid
- Polyglycolic Acid
- Polymers
- Serum Albumin, Bovine
- Tissue Engineering