Fig. 3.
Cell densities (in cells/cm2) at 24 and 48 h for Balb/3T3 mouse fibroblasts cultured in the presence of two oxygen-sensing microparticle densities representative of particle:cell ratios useful for probing cell microenvironment in two- and three-dimensional studies. ANOVA analysis indicated that there is no statistical difference between treatments at each time point, signifying that the microparticles are non-cytotoxic to the cells under standard in vitro conditions. Data shown as mean ± standard error for six trials.