title: Biotransformation using Mucor rouxii for the production of oleanolic acid derivatives and their antimicrobial activity against oral pathogens.
abstract: The goal of this study is to produce oleanolic acid derivatives by biotransformation process using Mucor rouxii and evaluate their antimicrobial activity against oral pathogens. The microbial transformation was carried out in shake flasks at 30°C for 216 h with shaking at 120 rpm. Three new derivatives, 7β-hydroxy-3-oxo-olean-12-en-28-oic acid, 7β,21β-dihydroxy-3-oxo-olean-12-en-28-oic acid, and 3β,7β,21β-trihydroxyolean-12-en-28-oic acid, and one know compound, 21β-hydroxy-3-oxo-olean-12-en-28-oic acid, were isolated, and the structures were elucidated on the basis of spectroscopic analyses. The antimicrobial activity of the substrate and its transformed products was evaluated against five oral pathogens. Among these compounds, the derivative 21β-hydroxy-3-oxo-olean-12-en-28-oic acid displayed the strongest activity against Porphyromonas gingivalis, which is a primary etiological agent of periodontal disease. In an attempt to improve the antimicrobial activity of the derivative 21β-hydroxy-3-oxo-olean-12-en-28-oic acid, its sodium salt was prepared, and the minimum inhibitory concentration against P. gingivalis was reduced by one-half. The biotransformation process using M. rouxii has potential to be applied to the production of oleanolic acid derivatives. Research and antimicrobial activity evaluation of new oleanolic acid derivatives may provide an important contribution to the discovery of new adjunct agents for treatment of dental diseases such as dental caries, gingivitis, and periodontitis.
authors.affiliation: Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, Ribeirão Preto, SP, 14040-903, Brazil.
authors.forename: Clarissa S
authors.initials: CS
authors.lastname: Capel
authors.forename: Ana C D
authors.initials: AC
authors.lastname: de Souza
authors.forename: Tatiane C
authors.initials: TC
authors.lastname: de Carvalho
authors.forename: João P B
authors.initials: JP
authors.lastname: de Sousa
authors.forename: Sérgio R
authors.initials: SR
authors.lastname: Ambrósio
authors.forename: Carlos H G
authors.initials: CH
authors.lastname: Martins
authors.forename: Wilson R
authors.initials: WR
authors.lastname: Cunha
authors.forename: Rosario H
authors.initials: RH
authors.lastname: Galán
authors.forename: Niege A J C
authors.initials: NA
authors.lastname: Furtado
mesh_terms: D000890:Anti-Infective Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D001711:Biotransformation; D009089:Mucor / Q000378:metabolism*; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D016966:Porphyromonas gingivalis / Q000187:drug effects
chemical_list: D000890:Anti-Infective Agents; D009828:Oleanolic Acid