Publication Summary
Characterisation of Cutibacterium acnes phylotypes in acne and in vivo exploratory evaluation of Myrtacine®
Objective
Compare Cutibacterium acnes (C.acnes) colonization of the skin of acne patients with that of healthy subjects.
Evaluate the efficacy of a topical formulation containing Myrtacine® on the overall population of C.acnes and antibiotic-resistant strains in acne patients
Methodology
Bicentric study in 2 phases:
- Phase 1: Comparison of C. acnes microflora between acne-prone and healthy subjects
- Phase 2: Effect of KERACNYL PP + applied twice a day for 2 months in 60 subjects with mild to moderate acne
Evaluation Criteria
- Quantification of total and antibiotic-resistant C. acnes (culture)
- C. acnes subtyping: (MALDI-TOF)
- Quantification of porphyrins (virulence factor) (image analysis)
- Counting of non-inflammatory and inflammatory acne lesions (ECLA score, GEA score)
Results
- C. acnes type IA phylotype is dominant in acne sufferers

- After 2 months of application of a product containing Myrtacine®, - 25% fewer porphyrins, virulence factors of C. acnes

Conclusion
A topical formula containing Myrtacine® acts on the virulence of C. acnes and reduces the population of antibiotic-resistant C. acnes
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