Figure 9. Effects of intraocular pressure (IOP) elevation on the messenger RNA (mRNA) content of interleukin-1β (IL-1β) and IL-6 in the retina. A: Alterations in IL-1β mRNA content in the retina after IOP elevation (open circles) or the retina after the sham treatment (closed circles). B: Alterations in IL-6 mRNA content in the retina after IOP elevation (open circles) or the sham treatment (closed circles). Open triangles represent samples from eyes treated with oxidized adenosine triphosphate (OxATP) at 10 µM just after IOP elevation. Data are expressed as mean±standard error of the mean (SEM; n=4–5). The asterisks indicate significant differences from the sham control eyes (*) or from the eyes after IOP elevation (**; Mann–Whitney U-test, p<0.05).