IL-1B(3954) polymorphism and red complex bacteria increase IL-1β (GCF) levels in periodontitis

Area of Science:

• Periodontology
• Genetics
• Microbiology

Background:

• Periodontitis susceptibility is linked to genetic variations, including IL-1 gene cluster polymorphisms.
• The IL-1B(3954)-SNP has been associated with elevated IL-1β and specific periodontal pathogens in previous studies.
• Evidence is limited on how IL-1B gene polymorphisms influence periodontitis by affecting IL-1β levels or microbial profiles.

Purpose of the Study:

• To compare IL-1β levels in gingival crevicular fluid (GCF) between healthy and periodontitis sites.
• To investigate the association of IL-1B(3954)-Single Nucleotide Polymorphism (SNP) status with GCF IL-1β levels and bacterial profiles in periodontitis patients.
• To determine if IL-1B(3954)-SNP influences GCF IL-1β levels and periodontal pathogen presence.

Main Methods:

• Collected GCF, subgingival plaque, and buccal epithelial cells from 32 periodontitis patients.
• Quantified GCF IL-1β levels using enzyme-linked immunosorbent assay (ELISA).
• Analyzed 11 periodontal pathogens via polymerase chain reaction (PCR) and determined IL-1B(3954)-SNP status.

Main Results:

• A significant association was found between IL-1B(3954)-SNP and GCF IL-1β levels (amount and concentration).
• Increased GCF IL-1β levels were linked to the presence of two or three red complex bacterial species.
• The highest GCF IL-1β levels were observed in periodontitis sites with both IL-1B(3954)-SNP and all three red complex pathogens.

Conclusions:

• Both IL-1B(3954)-SNP and red complex bacteria are independently associated with elevated IL-1β in GCF of periodontitis sites.
• Understanding the interplay between genetics, bacteria, and inflammation is key for improved periodontitis management.
• Further research is needed to develop advanced diagnostic, prognostic, and therapeutic strategies for periodontitis.