Single Nucleotide Variants in the IL33 and IL1RL1 (ST2) Genes Are Associated with Periodontitis and with Aggregatibacter Actinomycetemcomitans in the Dental Plaque Biofilm: A Putative Role in Understanding the Host Immune Response in Periodontitis

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2023 Mar 22

PMID 36947565

Authors

Soraya C Trindade

Mabel P P Lopes

Tatiane T M C Oliveira

Milca J Silva

Gerson A Queiroz

Talita S Jesus

Ellen K N Santos

Paulo C Carvalho-Filho

Michelle M L Falcao

Patricia M Miranda

Rebeca P B Santos

Camila A Figueiredo

Alvaro A Cruz

Gregory J Seymour

Isaac S Gomes-Filho

Affiliations

Soon will be listed here.

Abstract

The Interleukin (IL)-33 is important in several inflammatory diseases and its cellular receptor is the Interleukin 1 receptor-like 1 (IL1RL1), also called suppression of tumorigenicity 2 ligand (ST2L). This study investigated associations between single nucleotide variants (SNVs) in the IL33 gene and in the IL1RL1 (ST2) gene with periodontitis. Additionally, aimed to determine the role of Aggregatibacter actinomycetemcomitans (Aa) relative amount in the subgingival biofilm in these associations. A cross-sectional study was carried out with 506 individuals that answered a structured questionnaire used to collect their health status, socioeconomic-demographic, and behavioral characteristics. Periodontal examination was performed to determine the presence and severity of periodontitis, and subgingival biofilm samples were collected to quantify the relative amount of Aa by real time polymerase chain reaction. Human genomic DNA was extracted from whole blood cells and SNV genotyping was performed. Logistic regression estimated the association measurements, odds ratio (OR), and 95% confidence interval (95%CI), between the IL33 and ST2 genes with periodontitis, and subgroup analyses assessed the relative amount of Aa in these associations. 23% of individuals had periodontitis. Adjusted measurements showed a statistically significant inverse association between two SNVs of the ST2; rs148548829 (C allele) and rs10206753 (G allele). These two alleles together with a third SNV, the rs11693204 (A allele), were inversely associated with moderate periodontitis. One SNV of the IL33 gene also showed a statistically significant inverse association with moderate periodontitis. Nine SNVs of the ST2 gene were inversely associated with the relative amount of Aa. In the high Aa subgroup, there was a direct association between 11 SNVs of the ST2 gene and moderate periodontitis and two SNVs of the ST2 gene and severe periodontitis, and eight SNVs of the ST2 gene and periodontitis. These exploratory findings of genetic variants in IL-33/ST2 axis support the concept that the different tissue responses among individuals with periodontitis may be modulated by the host's genetics, influencing the physiopathology of the disease.

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