MiR-9-1 Gene Methylation and DNMT3B (rs2424913) Polymorphism May Contribute to Periodontitis

Overview

Journal J Appl Oral Sci

Specialty Dentistry

Date 2020 Apr 9

PMID 32267380

Citations 6

Authors

Marina Castro Coelho

Ingrid Costa Queiroz

Jose Maria Chagas Viana Filho

Sabrina Garcia de Aquino

Darlene Camati Persuhn

Naila Francis Paulo de Oliveira

Affiliations

Soon will be listed here.

Abstract

Background: Genetic and epigenetic changes have been associated with periodontitis in various genes; however, little is known about genes involved in epigenetic mechanisms and in oxidative stress.

Objective: This study aims to investigate the association of polymorphisms C677T in MTHFR (rs1801133) and -149C→T in DNMT3B (rs2424913), as well as the methylation profiles of MTHFR, miR-9-1, miR-9-3, SOD1, and CAT with periodontitis. The association between polymorphisms and DNA methylation profiles was also analyzed.

Methodology: The population studied was composed of 100 nonsmokers of both sexes, divided into healthy and periodontitis groups. Genomic DNA was extracted from the epithelial buccal cells, which were collected through a mouthwash. Polymorphism analysis was performed through polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), while methylation-specific PCR (MSP) or combined bisulfite restriction analysis techniques were applied for methylation analysis.

Results: For DNMT3B, the T allele and the TT genotype were detected more frequently in the periodontitis group, as well as the methylated profile on the miR-9-1 promoter region. There was also a tendency towards promoter region methylation on the CAT sequence of individuals with periodontal disease.

Conclusion: The polymorphism -149C→T in DNMT3B (rs2424913) and the methylated profile of the miR-9-1 promoter region are associated with periodontitis.

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