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391.
Tsai WB Chen CH Chen JF Chang KY 《Journal of materials science. Materials in medicine》2006,17(4):337-343
Understanding how a specific biomaterial may influence chondrocyte adhesion, proliferation and gene expression is important
in cartilage tissue engineering. In this study several biodegradable polymers that are commonly used in tissue engineering
were evaluated with respect to their influence on chondrocyte attachment, proliferation and gene expression. Primary cultures
of porcine chondrocytes were performed in films made of poly-L-lactic acid (PLLA), poly-D,L-lactic acid (PDLLA), poly-(lactide-co-glycolide)
(PLGA), or polycaprolactone (PCL). Chondrocytes adhered to PDLLA or PLGA after 1-day incubation better than to PLLA or PCL.
After 7 or 14 day culture, the cell numbers on PDLLA or PLGA was still higher than PLLA or PCL. The results suggested that
cell attachment and growth might depend on degradation rate of biodegradable polymers. Along with the fact that PDLLA or PLGA
supported expression of chondrocyte specific genes more than PLLA or PCL, the former two materials seemed to be more suitable
for cartilage tissue engineering than the latter ones. Besides, we found that chondrocyte phenotype prior to seeding was important
in the expression of ECM proteins. 相似文献
392.
393.
Nanoparticle susceptibility constants were defined and used to evaluate the antimicrobial characteristics of silver and copper nanoparticles against Escherichia coli and Bacillus subtilis. Reaction of copper nanoparticles of 100 nm with B. subtilis showed the highest susceptibility (Z=0.0734 mL/microg) whereas the reaction of silver nanoparticles of 40 nm with E. coli showed the lowest one (Z=0.0236 mL/microg). 相似文献