1
|
Medeiros MRF, de Melo Prado LA, Fernandes VC, Figueiredo SS, Coppede J, Martins J, Fiori GML, Martinez-Rossi NM, Beleboni RO, Contini SHT, Pereira PS, Fachin AL. Antimicrobial Activities of Indole Alkaloids from Tabernaemontana catharinensis. Nat Prod Commun 2011. [DOI: 10.1177/1934578x1100600209] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Tabernaemontana catharinensis root bark ethanol extract, EB2 fraction and the MMV alkaloid (12-methoxy-4-methylvoachalotine) were evaluated for their antimicrobial activities. T. catharinensis ethanol extract was effective against both strains of the dermatophyte Trichophyton rubrum at concentrations of 2.5 mg/mL (wild strain) and 1.25 mg/mL (mutant strain), while the EB2 fraction and MMV alkaloid showed a strong antifungal activity against wild and mutant strains with MIC values of <0.02 and 0.16 mg/mL, respectively. The EB2 fraction showed a strong antibacterial activity against ATCC strains of S. aureus, S. epidermidis, E. coli and P. aeruginosa with MICs from <0.02 to 0.04 mg/mL, as well as against resistant clinical isolates species of Enterococcus sp, Klebsiella oxytoca, Citrobacter, K. pneumoniae, P. mirabilis, S. aureus, S. epidermidis, E. coli and P. aeruginosa with MIC values ranging from 0.04 to 0.08 mg/mL. The MMV alkaloid presented a MIC of 0.16 mg/mL against the strains of S. aureus and E. coli ATCC. For the resistant clinical isolates Enterococcus sp, Citrobacter, S. aureus, S. epidermidis, E. coli and P. aeruginosa the MIC of MMV ranged from 0.08 to 0.31 mg/mL. The chromatography analysis of the EB2 fraction revealed the presence of indole alkaloids, including MMV, possibly responsible for the observed antimicrobial activity.
Collapse
Affiliation(s)
| | | | | | | | - Juliana Coppede
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, SP, Brasil
| | - Juliana Martins
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, SP, Brasil
| | | | - Nilce Maria Martinez-Rossi
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo Ribeirão Preto, SP, Brazil
| | | | | | | | - Ana Lúcia Fachin
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, SP, Brasil
| |
Collapse
|