Identification of cannabinoid-sensitive and -resistant oral bacteria

Area of Science:

• Oral microbiology
• Periodontology
• Pharmacology

Background:

• Marijuana use is linked to increased periodontitis risk.
• Microbial dysbiosis is a key feature of periodontitis.
• Cannabis contains phytocannabinoids with potential antibacterial properties.

Purpose of the Study:

• To investigate the susceptibility of oral bacteria to cannabidiol (CBD).
• To explore the impact of CBD on oral microbiome composition.
• To identify potential therapeutic agents for cannabis-associated periodontitis.

Main Methods:

• In vitro susceptibility testing of oral bacteria against CBD.
• Microbiome analysis of marijuana users and non-users with periodontitis.
• Screening of antimicrobial peptoids against resistant oral bacteria.

Main Results:

• Specific oral bacteria (e.g., P. gingivalis, F. nucleatum) showed sensitivity to CBD.
• Other oral bacteria (e.g., T. denticola, V. parvula) were resistant to CBD.
• Antimicrobial peptoids demonstrated efficacy against CBD-resistant bacteria and altered bacterial ultrastructure.

Conclusions:

• Cannabis use may promote specific oral pathobionts, contributing to periodontitis.
• CBD exhibits differential effects on oral bacteria, potentially driving dysbiosis.
• Cathelicidin-mimicking peptoids represent a potential adjunctive therapy for managing cannabis-exacerbated periodontitis.