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Updated: Jun 19, 2026
07:15
Robust Ligature-Induced Model of Murine Periodontitis for the Evaluation of Oral Neutrophils
Published on: January 21, 2020
A 3' UTR transition within DEFB1 is associated with chronic and aggressive periodontitis
A S Schaefer1, G M Richter, M Nothnagel
1Institute for Clinical Molecular Biology, University Medical Center Schleswig-Holstein, Kiel, Germany. a.schaefer@ikmb.uni-kiel.de
Genes and Immunity
|October 16, 2009
Summary
A genetic variant in the DEFB1 gene, specifically rs1047031, is linked to an increased risk of developing periodontal disease. This finding highlights DEFB1
Area of Science:
- Genetics
- Immunology
- Periodontology
Background:
- Periodontal diseases are prevalent inflammatory conditions affecting up to 20% of the global population.
- An imbalanced immune response to oral microbial pathogens is a key factor in periodontitis development.
- Defensins, such as DEFB1, are crucial antimicrobial peptides involved in immune defense and maintaining oral health.
Purpose of the Study:
- To conduct the first systematic genetic association study of the DEFB1 gene in relation to periodontal diseases.
- To investigate the association of DEFB1 variants with periodontitis risk in a large, ethnically matched population.
- To identify potential causative variants within DEFB1 contributing to disease susceptibility.
Main Methods:
- Employed a haplotype-tagging single nucleotide polymorphism (SNP) approach to analyze DEFB1 variants.
- Included known promoter SNPs and investigated the 3' untranslated region of DEFB1.
- Analyzed a large cohort comprising 1337 cases and 2887 ethnically matched controls.
Main Results:
- The DEFB1 3' untranslated region SNP, rs1047031, showed a significant association with increased genetic risk (P=0.002).
- Homozygous carriers of the rare A allele at rs1047031 had a 1.3-fold increased risk of periodontitis.
- This association was consistent across chronic and aggressive periodontitis subtypes, with specific odds ratios and p-values reported.
Conclusions:
- The DEFB1 SNP rs1047031 is significantly associated with an elevated genetic risk for periodontal diseases.
- No other associated variants were identified in regulatory or exonic regions, suggesting rs1047031 as the likely causative variant.
- The rs1047031 locus contains a potential microRNA-binding site, indicating a possible regulatory mechanism influencing DEFB1 function in periodontitis.
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