The use of temperature-composition combinatorial libraries to study the effects of biodegradable polymer blend surfaces on vascular cells.

Sung HJ, Su J, Berglund JD, Russ BV, Meredith JC, Galis ZS
Biomaterials. 2005 26 (22): 4557-67

PMID: 15722125 · DOI:10.1016/j.biomaterials.2004.11.034

Controlling cellular and physiological responses such as adhesion, proliferation and migration is a highly desirable feature of engineered scaffolds. One important application would be the design of tissue engineered vascular grafts that regulate cell adhesion and growth. We utilized temperature-composition combinatorial polymer libraries to investigate the effects of surfaces of blended poly(D,L-lactic-co-glycolic acid) (PLGA) and poly(epsilon-caprolactone) (PCL) on murine vascular smooth muscle cells (SMC). In this manner, SMCs were exposed to approximately 1000 distinguishable surfaces in a single experiment, allowing the discovery of optimal polymer compositions and processing conditions. SMC adhesion, aggregation, proliferation, and protein production were highest in regions with mid- to high-PCL concentrations and high annealing temperatures. These regions exhibited increased surface roughness, increased microscale PLGA-rich matrix stiffness, and significant change of bulk PCL-rich crystallinity relative to other library regions. This study revealed a previously unknown processing temperature and blending composition for two well-known polymers that optimized SMC interactions.

MeSH Terms (10)

Animals Biodegradation, Environmental Blood Vessels Cells, Cultured Combinatorial Chemistry Techniques Mice Mice, Inbred C57BL Polymers Surface Properties Temperature

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