[EN] METHODS AND COMPOSITIONS COMPRISING GUANIDINES FOR TREATING BIOFILMS [FR] MÉTHODES ET COMPOSITIONS COMPRENANT DES GUANIDINES DESTINÉS AU TRAITEMENT DE BIOFILMS
[EN] METHODS AND COMPOSITIONS COMPRISING GUANIDINES FOR TREATING BIOFILMS [FR] MÉTHODES ET COMPOSITIONS COMPRENANT DES GUANIDINES DESTINÉS AU TRAITEMENT DE BIOFILMS
[EN] METHODS AND COMPOSITIONS COMPRISING GUANIDINES FOR TREATING BIOFILMS<br/>[FR] MÉTHODES ET COMPOSITIONS COMPRENANT DES GUANIDINES DESTINÉS AU TRAITEMENT DE BIOFILMS
申请人:HARVARD COLLEGE
公开号:WO2014078801A1
公开(公告)日:2014-05-22
Methods of treating or reducing biofilms, treating a biofilm-related disorder, triggering biofilm disassembly, and preventing biofilm formation using guanidines is described.
Biofilms are often associated with human bacterial infections, and the natural tolerance of biofilms to antibiotics challenges treatment. Compounds with anti-biofilm activity could become useful adjuncts to antibiotic therapy. We used norspermidine, a natural trigger for biofilm disassembly in the developmental cycle of Bacillus subtilis, to develop guanidine and biguanide compounds with up to 20-fold increased potency in preventing biofilm formation and breaking down existing biofilms. These compounds also were active against pathogenic Staphylococcus aureus. An integrated approach involving structure activity relationships, protonation constants, and crystal structure data on a focused synthetic library revealed that precise spacing of positively charged groups and the total charge at physiological pH distinguish potent biofilm inhibitors.