| Background and objectives: Most studies have identified interferon-gamma (IFN-γ) as
a key role in the pathogenesis of oral lichen planus (OLP). Recent studies have also
shown a link between IFN-γ (+874 A/T) gene polymorphism and OLP. The purpose of
the present meta-analysis is to investigate the relationship between IFN-γ (+874 A/T)
gene polymorphism and susceptibility to OLP.
Methods: A systematic search of resources to investigate the association between IFN-γ
and OLP from Google scholar, PubMed, Embase, Cochrane, Scopus, Proquest, Ovid and
Web of science (from 2000 to April 2019) completed. Two individuals independently
assessed the quality of the articles. Endnote X5 resource management software was used
to organize, study titles and abstracts as well as identify duplicates. A random effect
model was also used to perform the meta-analysis.
Results: Four IFN-γ (+874 A/T) polymorphism studies with 297 patients in the case
group and 621 healthy controls in the 4 different countries were included. After meta-
analysis, a significant association was found between IFN-γ polymorphism (+874 A/T)
and OLP. (T vs A: odds ratio (OR) = 1.62; 95% CI = 1.28-2.04; TT vs AA: OR = 2.67;
95% CI = 1.6- 4.45; AT vs AA: OR = 1.56; 95% CI = 1.6- 4.45; TT vs AT + AA: OR =
1.73; 95% CI = 1.13-2.64; AT + TT vs AA: OR = 1.75; 95% CI = 1.28-2.43)
Conclusion: Based on this meta-analysis, there was a positive relationship between IFN-
γ (+874 A/T) gene polymorphism and the risk of OLP. The findings showed that
increasing TT genotypes significantly increased susceptibility to OLP in comparison
with other genotypes. |