Figure 4. Expression of MMPs and COX enzymes in gingival tissues of rats 7 days after the beginning of the PAR₂ agonist (SLIGRL) or control peptide (LRGILS) daily topical treatment, analyzed by Western blot. Representative Western blots for MMPs and COX enzymes (A), each band corresponding to the tissues from one rat. Mean density of detected bands (B), N = 5 animals/group; data expressed as means ± SEM. *Significant differences (p < 0.05) when compared with the LRGILS group by unpaired t test.