Fanfoni, Lidia; Marsich, Eleonora; Turco, Gianluca; Breschi, Lorenzo; Cadenaro, Milena published the artcile< Development of di-methacrylate quaternary ammonium monomers with antibacterial activity>, Application of C6H8N2, the main research area is dimethacrylate quaternary ammonium monomer antibacterial activity; Antibacterial monomer; Cytotoxicity; MIC/MBC; Structure-activity relationship; bis-quaternary ammonium salt; di-methacrylate monomer.
Nine antibacterial di-methacrylate monomers based on bis-quaternary ammonium salts (bis-QAMs) were synthesized and structurally characterized. The biol. activity of the bis-QAMs was tested in terms of min. inhibitory concentration (MIC) and min. bactericidal concentration (MBC) on different bacterial strains achieving promising results and, in most cases, a complete bactericidal effect using a bis-QAM concentration lower than 1 mg/mL. Two of the structures showed comparable and superior activity against S. mutans than the com. monomer 12-methacryloyloxydodecyl pyridinium bromide (MDBP). All the bis-QAMs here described were able to inhibit S. mutans biofilm formation at a concentration equal to the MIC value. From the anal. of the obtained data, some correlation regarding the structure and the antibacterial activity of the bis-QAMs could be drawn: a flexible alkyl C12 spacer between the two quaternary ammonium moieties increased the monomer antibacterial effect in comparison to the aromatic ones; the equilibrium between hydrophobic and hydrophilic moieties was directly correlated to the bactericidal range of action; the increase of the steric hindrance of the ammonium side groups might be both advantageous or disadvantageous to the antibacterial efficacy depending on the whole monomer chem. structure. Even though the possible correlation between the monomer structures and their bacteriostatic or bactericidal effect is under investigation, the monomers exhibited low cytotoxicity on human dental pulp stem cells, confirming their promising potential in the dental materials′ field.
Acta Biomaterialia published new progress about Antibacterial agents. 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Application of C6H8N2.