Effects of Nidus Vespae extract and chemical fractions on glucosyltransferases, adherence and biofilm formation of Streptococcus mutans.
Nidus Vespae (the honeycomb of Polistes olivaceous, P. japonicus Saussure and Parapolybiavaria fabricius) have been extensively used in traditional Chinese medicine, given their multiple pharmacological activities, including antimicrobial, anti-inflammatory, anti-virus, anti-tumor and anesthetic properties. The present study evaluated the anti-glucosyltransferases (GTFs) activity, anti-adherence and anti-biofilm properties of 95% ethanol/water extract, cyclohexane/ethyl acetate, petroleum ether/ethyl acetate and chloroform/methanol fractions of Nidus Vespae. Chloroform/methanol fraction showed a remarkable capacity for inhibiting the adherence of Streptococcus mutans ATCC 25175 to saliva-coated hydroxyapatite disc (S-HA) at sub-MC concentrations. In addition, the Nidus Vespae extract and chemical fractions significantly inhibited the activity of cell-associated and extracellular GTFs at sub-MIC concentrations, and the chloroform/methanol fraction was the most effective one. For the anti-biofilm activity assays, minimum biofilm inhibition concentrations (MBIC50) and minimum biofilm reduction concentrations (MBRC50) were determined using the microdilution method. The chloroform/methanol fraction showed the highest anti-biofilm activities with a MBIC50 of 8mg/ml and a MBRC(50) of 16mg/ml against Streptococcus mutans ATCC 25175. The significant inhibition of GTFs activity and biofilm formation demonstrated by Nidus Vespae shows it to be a promising natural product for the prevention of dental caries.
Xiao
Jin
J
Key Laboratory for Oral Biomedical Engineering Ministry of Education, Chengdu, China.
Zuo
Yuling
Y
Liu
Yuan
Y
Li
Jiyao
J
Hao
Yuqing
Y
Zhou
Xuedong
X
D000818:Animals; D000890:Anti-Infective Agents / Q000008:administration & dosage / Q000494:pharmacology*; D000891:Anti-Infective Agents, Local / Q000494:pharmacology; D001422:Bacterial Adhesion / Q000187:drug effects*; D018441:Biofilms / Q000187:drug effects*; D002710:Chlorhexidine / Q000494:pharmacology; D044622:Dental Pellicle / Q000382:microbiology; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000008:administration & dosage / Q000494:pharmacology*; D017886:Durapatite / Q000737:chemistry; D005936:Glucans / Q000032:analysis; D005964:Glucosyltransferases / Q000187:drug effects*; D006801:Humans; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology*; D011135:Polysaccharides, Bacterial / Q000187:drug effects; D013295:Streptococcus mutans / Q000187:drug effects* / Q000201:enzymology / Q000502:physiology; D014863:Wasps; D014885:Waxes / Q000494:pharmacology*
D000890:Anti-Infective Agents; D000891:Anti-Infective Agents, Local; D004365:Drugs, Chinese Herbal; D005936:Glucans; D010936:Plant Extracts; D011135:Polysaccharides, Bacterial; D014885:Waxes; D017886:Durapatite; D005964:Glucosyltransferases; D002710:Chlorhexidine