Cutibacterium acnes bacterial biomolecules (C. acnes biomolecules)

Cutibacterium acnes (formerly Propionibacterium acnes) is a Gram-positive, anaerobic bacterium that resides primarily within the pilosebaceous units of human skin [1]. While it is a common commensal, its bacterial biomolecules—including lipases (e.g., GehA), proteases, hyaluronate lyases, and cell wall components like peptidoglycan—play a central role in the development of acne vulgaris by triggering inflammatory responses [2]. These biomolecules interact with the host immune system via Toll-like receptors, specifically TLR2, leading to the secretion of pro-inflammatory cytokines from keratinocytes and sebocytes [3]. Pharmacological intervention typically targets these biomolecules through antibiotics like clindamycin and tetracyclines, which inhibit the bacterial ribosome (30S or 50S subunits) to halt protein synthesis [4]. Alternatively, agents like benzoyl peroxide exert bactericidal effects by generating reactive oxygen species that non-specifically oxidize bacterial proteins and DNA [5]. Recent research also focuses on specific virulence factors, such as Christie-Atkins-Munch-Petersen (CAMP) factors and porphyrins, as potential targets for more selective therapies [6]. Targeting these specific biomolecules aims to reduce inflammation while avoiding the widespread antibiotic resistance associated with traditional broad-spectrum treatments [7]. Understanding the diversity of these biomolecules is essential for distinguishing between commensal and pathogenic strains of the bacteria [8].

Other names

Propionibacterium acnes biomoleculesC. acnes antigensC. acnes virulence factorsC. acnes proteins

Inhibition of bacterial protein synthesis by binding to the 30S or 50S ribosomal subunits; generation of reactive oxygen species to oxidize bacterial proteins; inhibition of bacterial lipase and metabolic enzymes.