(A–E). Significantly less CXCL12 mRNA was detected in the cornea after silencing HMGB1 at 1 day p.i. (p<0.001) compared to scrambled siRNA treatment No significant difference was detected between groups in normal, uninfected cornea or at 3 and 5 days p.i. (A). CXCL12 protein was reduced in the normal (p<0.04) and at 5 days p.i. (p<0.001) cornea after siHMGB1 treatment (B). Expression of CXCR4 was significantly reduced in the cornea of siHMGB1 compared to scrambled control treated mice at 1, 3, and 5 days p.i. (p<0.001, 0.01, and 0.01). No difference was detected between groups in normal, uninfected corneas (C). CXCR4 protein was significantly reduced in the corneas of siHMGB1 vs control treated mice at 5 days p.i. (p<0.01). No difference was detected between groups in normal, uninfected corneas or at 3 days p.i. (D).