Cytotoxicity of Brazilian plant extracts against oral microorganisms of interest to dentistry

BMC Complementary and Alternative Medicine

Luciane Dias de Oliveira²  Antonio Olavo Cardoso Jorge³  Cláudio Antonio Talge Carvalho¹  Samira Esteves Afonso Camargo²  Polyana das Graças Figueiredo Vilela³  Vinicius Carlos de Castro³  Jonatas Rafael de Oliveira³ 

[1] Department of Restorative Dentistry, Institute of Science and Technology, Univ Estadual Paulista/UNESP, São José dos Campos, SP, Brazil;Department of Biosciences and Oral Diagnosis, Laboratory of Biochemistry and Pharmacology, Institute of Science and Technology, Univ Estadual Paulista/UNESP, São José dos Campos, SP, Brazil;Department of Biosciences and Oral Diagnosis, Laboratory of Microbiology and Immunology, Institute of Science and Technology, Univ Estadual Paulista/UNESP, Av. Engenheiro Francisco José Longo, 777 - Jardim São Dimas, São José dos Campos, SP, Brazil

关键词: Candida glabrata;    Candida tropicalis;    Candida albicans;    Streptococcus mutans;    Staphylococcus epidermidis;    Staphylococcus aureus;    Stryphnodendron barbatimam Mart;    Punica granatum L;    Glycyrrhiza glabra L;    Equisetum arvense L;   

Others  :  1221034
DOI  :  10.1186/1472-6882-13-208

 received in 2013-02-11, accepted in 2013-08-13,  发布年份 2013

【 摘 要 】

Background

With the emergence of strains resistant to conventional antibiotics, it is important to carry studies using alternative methods to control these microorganisms causing important infections, such as the use of products of plant origin that has demonstrated effective antimicrobial activity besides biocompatibility. Therefore, this study aimed to evaluate the antimicrobial activity of plant extracts of Equisetum arvense L., Glycyrrhiza glabra L., Punica granatum L. and Stryphnodendron barbatimam Mart. against Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus mutans, Candida albicans, Candida tropicalis, and Candida glabrata, and to analyze the cytotoxicity of these extracts in cultured murine macrophages (RAW 264.7).

Methods

Antimicrobial activity of plant extracts was evaluated by microdilution method based on Clinical and Laboratory Standards Institute (CLSI), M7-A6 and M27-A2 standards. The cytotoxicity of concentrations that eliminated the microorganisms was evaluated by MTT colorimetric method and by quantification of proinflammatory cytokines (IL-1β and TNF-α) using ELISA.

Results

In determining the minimum microbicidal concentration, E. arvense L., P. granatum L., and S. barbatimam Mart. extracts at a concentration of 50 mg/mL and G. glabra L. extract at a concentration of 100 mg/mL, were effective against all microorganisms tested. Regarding cell viability, values were 48% for E. arvense L., 76% for P. granatum L, 86% for S. barbatimam Mart. and 79% for G. glabra L. at the same concentrations. About cytokine production after stimulation with the most effective concentrations of the extracts, there was a significant increase of IL-1β in macrophage cultures treated with S. barbatimam Mart. (3.98 pg/mL) and P. granatum L. (7.72 pg/mL) compared to control (2.20 pg/mL) and a significant decrease of TNF-α was observed in cultures treated with G. glabra L. (4.92 pg/mL), S. barbatimam Mart. (0.85 pg/mL), E. arvense L. (0.83 pg/mL), and P. granatum L. (0.00 pg/mL) when compared to control (41.96 pg/mL).

Conclusions

All plant extracts were effective against the microorganisms tested. The G. glabra L. extract exhibited least cytotoxicity and the E. arvense L. extract was the most cytotoxic.

【 授权许可】

   
2013 de Oliveira et al.; licensee BioMed Central Ltd.

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