title: In vitro and in vivo effects of isolated fractions of Brazilian propolis on caries development.
abstract: Recently, two chemically different types of Brazilian propolis (type-3 and -12) were shown to have cariostatic properties. This study aimed to evaluate the influence of their isolated fractions on mutans streptococci viability, glucosyltransferases (GTFs) activity and caries development in rats. The ethanolic extracts of propolis (EEPs) were serially fractionated into hexane (H-fr), chloroform, ethyl acetate, and ethanol. The ability of the four fractions and EEP to inhibit Streptococcus mutans and Streptococcus sobrinus growth and adherence to a glass surface was examined. The effect on GTFs B and C activity was also determined. For the caries study, 60 Wistar rats infected with Streptococcus sobrinus were treated topically twice daily as follows: (1) EEP type-3, (2) H-fr type-3, (3) EEP type-12, (4) H-fr type-12, and (5) control. In general, the H-fr from both types of propolis showed the highest antibacterial activity and GTFs inhibition. Furthermore, the EEP and H-fr type-3 and -12 were equally effective in reducing dental caries in rats. The data suggest that the putative cariostatic compounds of propolis type-3 and -12 are mostly non-polar; and H-fr should be the fraction of choice for identifying further potentially novel anti-caries agents.
authors.affiliation: Department of Physiological Sciences, Dentistry Faculty of Piracicaba, State University of Campinas, Av. Limeira, 901 PIRACICABA-SP, CEP: 13414-903, Brazil. mhayacibara@wnet.com.br
authors.forename: Mitsue F
authors.initials: MF
authors.lastname: Hayacibara
authors.forename: Hyun
authors.initials: H
authors.lastname: Koo
authors.forename: Pedro L
authors.initials: PL
authors.lastname: Rosalen
authors.forename: Simone
authors.initials: S
authors.lastname: Duarte
authors.forename: Eliane M
authors.initials: EM
authors.lastname: Franco
authors.forename: William H
authors.initials: WH
authors.lastname: Bowen
authors.forename: Masaharu
authors.initials: M
authors.lastname: Ikegaki
authors.forename: Jaime A
authors.initials: JA
authors.lastname: Cury
mesh_terms: D000818:Animals; D001938:Brazil; D002327:Cariostatic Agents / Q000494:pharmacology*; D003731:Dental Caries / Q000382:microbiology / Q000517:prevention & control; D005260:Female; D005964:Glucosyltransferases / Q000378:metabolism; D008826:Microbial Sensitivity Tests; D011429:Propolis / Q000032:analysis* / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar; D016986:Streptococcus sobrinus / Q000302:isolation & purification
chemical_list: D002327:Cariostatic Agents; D011429:Propolis; D005964:Glucosyltransferases