Correlation coefficients of SAEC and HMVEC monoculture and coculture global mRNA expression with global mRNA expression from mouse lungs exposed to MWCNT. Total in vitro mRNA expression from 6 biological replicates of cell cultures exposed to DM or 1.2 µg/mL MWCNT for 6 and 24 h was compared to total mRNA expression from 8 biological replicates ofin vivo mouse lungs exposed to dispersion media, 10, 20, 40, or 80 µg MWCNT for 1, 7, 28, or 56 days. Human and mouse genomes were matched using the bioinformatics tool BioMart, and gene expression values were correlate ed using Pearson’s correlation.