The antimicrobial peptide DEFB1 is associated with caries

Area of Science:

• Genetics
• Oral Biology
• Immunology

Background:

• Individual susceptibility to dental caries and periodontal diseases is influenced by genetic factors.
• Beta defensin 1 (DEFB1), a peptide with antimicrobial properties, is present in the oral cavity.
• Understanding the genetic basis of oral diseases is crucial for developing targeted prevention and treatment strategies.

Purpose of the Study:

• To investigate the association between genetic variations in the DEFB1 gene and susceptibility to dental caries and periodontal diseases.
• To identify specific DEFB1 single-nucleotide polymorphisms (SNPs) and haplotypes linked to caries experience.
• To determine if DEFB1 genetic markers are associated with periodontal disease.

Main Methods:

• Analysis of three single-nucleotide polymorphisms (SNPs) in the DEFB1 gene.
• Genotyping performed on DNA samples from unrelated individuals.
• Statistical analysis to correlate DEFB1 genotypes and haplotypes with clinical data (DMFT and DMFS scores).

Main Results:

• Carrying a copy of the variant allele of the DEFB1 marker rs11362 (G-20A) was associated with a >5-fold increase in DMFT and DMFS scores.
• Carrying a copy of the variant allele of the DEFB1 marker rs179946 (G-52A) correlated with lower DMFT scores.
• A high-caries-experience haplotype (GCA) and a low-caries-experience haplotype (ACG) were identified in the DEFB1 promoter, affecting DMFT scores by two-fold in each direction.

Conclusions:

• Functional polymorphisms in the DEFB1 gene are associated with dental caries susceptibility.
• Specific DEFB1 genetic markers and haplotypes can serve as potential predictive markers for caries risk.
• No significant association was found between DEFB1 genetic markers and periodontal disease in this study.