Publication Summary

DUCRAY

Characterisation of Cutibacterium acnes phylotypes in acne and in vivo exploratory evaluation of Myrtacine®

S. Pécastaings, C. Roques, Th. Nocera, C.Peraud, V. Mengeaud, A. Khammani, B. Dréno
Journal of the European Academy of Dermatology and Venereology
2018

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 
Répartition des Phylotypes de C. acnes entre sujets sains et acnéiques
  • After 2 months of application of a product containing Myrtacine®, - 25% fewer porphyrins, virulence factors of C. acnes
Diminution des C.acnes antibiorésistants
Reducing the population of antibiotic-resistant 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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