Antimicrobial and antibiofilm action of Casbane Diterpene from Croton nepetaefolius against oral bacteria

作者：Sa Nairley Cardoso; Arruda Cavalcante Theodora Thays; Araujo Amanda Ximenes; dos Santos Helcio Silva; Jane Ribeiro Albuquerque Maria Rose; Bandeira Paulo Nogueira; Silva da Cunha Rodrigo Maranguape; Cavada Benildo Sousa; Teixeira Edson Holanda^*

来源：Archives of Oral Biology, 2012, 57(5): 550-555.

DOI：10.1016/j.archoralbio.2011.10.016

• Casbane Diterpene
• Biofilm
• Oral bacteria

Objective: The antibacterial activity of Casbane Diterpene (CD) was evaluated in vitro against Streptococcus oralis, S. mutans, S. salivarius, S. sobrinus, S. mitis and S. sanguinis. The viability of planktonic cells was analysed by susceptibility tests (MIC and MBC) and antibiofilm action was assayed.
Methods: The minimal inhibitory and bactericidal concentrations (MIC and MBC) of oral Streptococcus were evaluated through microdilution tests. To assay antibiofilm activity, biofilms were generated on 96-wells polystyrene plates under the presence of CD and quantified by a crystal violet technique and colonies forming units counting.
Results: The CD isolated from Croton nepetaefolius showed antimicrobial effect on planktonic forms and biofilms of oral pathogens, with MIC values of 62.5 mu g/mL against Streptococcus oralis and values between 125 and 500 mu g/mL against S. mutans, S. salivarius, S. sobrinus, S. mitis and S. sanguinis. CD showed an inhibitory effect on S. mutans biofilm formation at 250 mu g/mL, and a decrease on viable cell of 94.28% compared to the normal biofilm growth.
Conclusions: The compound CD can be considered as a promising molecule for the treatment against oral pathogens responsible for dental biofilm.

• 出版日期2012-5