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Pimenta pseudocaryophyllus inhibits virulence factors and promotes metabolic changes in Candida yeast
Assal, Flávio Ezeddinne El; Paula, Joelma Abadia Marciano; Capeletti, Leonardo Silva; Abrão, Fernando Yano; Ataídes, Fábio Silvestre; Sá, Fabyola Amaral da Silva; Costa, Carolina Rodrigues; Fernandes, Orionalda de Fátima Lisboa; Souza, Lúcia Kioko Hasimoto; Silva, Maria do Rosario Rodrigues.
  • Assal, Flávio Ezeddinne El; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
  • Paula, Joelma Abadia Marciano; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
  • Capeletti, Leonardo Silva; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
  • Abrão, Fernando Yano; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
  • Ataídes, Fábio Silvestre; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
  • Sá, Fabyola Amaral da Silva; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
  • Costa, Carolina Rodrigues; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
  • Fernandes, Orionalda de Fátima Lisboa; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
  • Souza, Lúcia Kioko Hasimoto; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
  • Silva, Maria do Rosario Rodrigues; Universidade Federal de Goiás. Instituto de Patologia Tropical e Saúde Pública. Goiânia. BR
Rev. Soc. Bras. Med. Trop ; 47(5): 618-623, Sep-Oct/2014. tab, graf
Article in English | LILACS | ID: lil-728892
ABSTRACT
Introduction This is the first study to examine the in vitro susceptibility and the expression of virulence factors in Candida species in the presence of Pimenta pseudocaryophyllus (Gomes) L.R. Landrum (Myrtaceae), a Brazilian plant known as paucravo. Additionally, the mechanisms of action of the crude ethanol extract and the ethyl acetate and aqueous fractions of this plant were investigated. Methods The in vitro susceptibility of Candida was tested using the broth microdilution method, whereas an XTT reduction assay was used for biofilms. Adherence was determined by counting the number of yeast cells that adhered to 100 oral epithelial cells, and hyphal formation was verified in the hyphal induction medium M199. Flow cytometry with propidium iodide and FUN-1 was performed to assess the mechanism of action. Results The results revealed that the crude ethanol extract and the ethyl acetate and aqueous fractions of P. pseudocaryophyllus inhibited the growth of Candida isolates at a minimal inhibitory concentration (MIC) ranging from 64 to 256µg/mL, whereas the 50% sessile minimal inhibitory concentration (SMIC50) ranged from 512 to >1,024µg/mL. Adherence and hyphal formation were significantly reduced in the presence of the crude ethanol extract and both fractions. Although cell membrane injury was detected, the predominant mechanism of action appeared to be the alteration of yeast metabolism, as demonstrated by flow cytometry. Conclusions Our results indicated that antifungal activity reduced the expression of virulence factors in yeast via the alteration of yeast metabolism, suggesting that the crude extract of P. pseudocaryophyllus and its fractions may contain novel antifungal agents. .
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Full text: Available Index: LILACS (Americas) Main subject: Candida / Plant Extracts / Pimenta / Virulence Factors / Antifungal Agents Limits: Humans Language: English Journal: Rev. Soc. Bras. Med. Trop Journal subject: Tropical Medicine Year: 2014 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Federal de Goiás/BR

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Full text: Available Index: LILACS (Americas) Main subject: Candida / Plant Extracts / Pimenta / Virulence Factors / Antifungal Agents Limits: Humans Language: English Journal: Rev. Soc. Bras. Med. Trop Journal subject: Tropical Medicine Year: 2014 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Federal de Goiás/BR