Association between total body bone mineral density and periodontitis: A Mendelian randomization study

Area of Science:

• Genetics
• Periodontology
• Osteology

Background:

• Periodontitis is a common inflammatory disease affecting gums and supporting bone.
• Bone mineral density (BMD) is a key indicator of skeletal health.
• Investigating the relationship between BMD and periodontitis is crucial for understanding disease etiology.

Purpose of the Study:

• To investigate the potential causal association between total body bone mineral density (BMD) and periodontitis.
• To utilize Mendelian randomization (MR) analysis for robust causal inference.

Main Methods:

• Employed 81 single nucleotide polymorphisms (SNPs) associated with BMD from a large genome-wide association study (GWAS) (n=66,628).
• Utilized GWAS data for periodontitis from a meta-analysis of seven cohorts (n=45,563).
• Performed Mendelian randomization analysis to assess the causal effect of genetically predicted BMD on periodontitis risk.

Main Results:

• Mendelian randomization analysis revealed no statistically significant association between genetically predicted BMD and periodontitis.
• The estimated odds ratio per standard deviation increment in BMD was 1.00 (95% CI: 0.92-1.08).
• Sensitivity analyses, including leave-one-out and pleiotropy-robust methods, did not indicate bias.

Conclusions:

• The study found no evidence to support a causal relationship between bone mineral density and periodontitis.
• These findings suggest that reduced BMD is unlikely to be a risk factor for developing periodontitis.
• Further research may explore other potential links or risk factors for periodontitis.