Figure 3.
LPS-stimulated increase in macrophage Mmp10 expression is dependent on type I IFN. Wild-type (WT) and Ifnar1−/− BMDMs were stimulated with PBS (control), LPS (10 ng/ml), or poly(I:C) (10 μg/ml) and mRNA levels of Mmp8, Mmp9, Mmp10, and Mmp12 relative to Hprt were measured at 4 h. LPS-induced Mmp10 expression was dependent on IFNAR1; however, poly(I:C) did not increase Mmp10 expression. LPS or poly(I:C) did not increase Mmp8, Mmp9, or Mmp12. Data represent mean ± SEM from five to six mice/genotype. Statistical analyses used two-way ANOVA with Sidak's multiple-comparisons test between WT and Ifnar1−/− samples and Tukey's multiple-comparisons test to compare treatment groups within each genotype. ***P < 0.001; ns, or otherwise not indicated, are not significant (P > 0.05).