NCI-H28 cells over-express PAR₁.

A, relative expression levels of PAR₁ mRNA in Met-5A and NCI-H28 cells as determined by real time RT-PCR. B, relative expression levels of PAR₁ protein in primary mesothelial cells, Met-5A, NCI-H28, REN, Ist-Mes2, and Mero-14 cell lines as determined by immunoblot analysis followed by densitometric quantitation. Data are expressed as arbitrary unit (fold increase over Ctrl, Met-5A cells) after normalization by β-actin. Data shown are mean ± SEM of three independent experiments. The differences in PAR₁ expression levels between Ctrl (Met-5A or primary mesothelial cells) and MPM cells were significant (*P≤0.05, ***P≤0.001) by one-way ANOVA followed by Bonferroni’s multiple comparison test (n = 3). C, a representative immunoblot.