Expression of IL-22, IL-22R and IL-23 in the peri-implant soft tissues of patients with peri-implantitis

摘要

Objectives: The aim of this study was to compare the expression of interleukin (IL)-22, IL-22R and IL-23 in the peri-implant soft tissues between the peri-implantitis patient group (PG) and peri-implant healthy control group (HG). Methods: The tissues were collected from 12 peri-implantitis patients and eight peri-implant healthy controls. Immunohistochemistry (IHC) and real-time quantitative PCR (qPCR) were performed to analyse the gene expression of IL-22, IL-22R and IL-23p19 in peri-implant soft tissues in the PG and the HG group. Results: The IHC result showed that number of IL-22, IL-22R, and IL-23p19 positive cells increased in PG than in HG (P < 0.05). The result of qPCR demonstrated that the expressions of IL-22 messenger RNA (mRNA) and IL-23p19 mRNA were significantly higher in the PG group compared to the HG group (P < 0.05). Gene expression of IL-22R mRNA was higher in the PG group; however, there was no statistically significant difference between these two groups (P > 0.05). Conclusions: This study indicates that there is an increased expression level of IL-22 and IL-23 in patients with peri-implantitis, which may induce expression of related pro-inflammatory cytokines and may further have a crucial role in tissue repair and reconstruction in pathogenesis of peri-implantitis.