Anticandida and antibiofilm activities of extract from Schinopsis brasiliensis Engl. against Candida spp

Abstract The pathogenic nature of infections caused by Candida spp. underscores the necessity for novel therapeutic agents. Extracts of Schinopsis brasilienses Engl are / a promising source of agents with antifungal effects. This study aimed to assess the antifungal potential of the leaf extract of S. brasilienses. The antifungal activity was evaluated by determining the minimum inhibitory concentrations and fungicide concentrations (MIC and MFC). The antibiofilm potential was assessed by counting colony-forming units/mL. The study examined the inhibition kinetics of fungal growth and potential synergism between gallic acid or the extract and nystatin using the Checkerboard method. Cytotoxicity was evaluated through the MTT assay. The extract exhibited antifungal effect against all tested strains, with MIC and MFC ranging from 31.25-250 μg/mL. Gallic acid, the main isolated compound, displayed a MIC of 2000 μg/mL. The extract of S. brasilienses at 31.25 μg/mL inhibited the formation of biofilm by C. albicans and significantly reduced the mass of mature biofilm after 24 and 48 h (p < 0. 05). At a concentration of 125 μg/mL, the extract demonstrated significant inhibition of fungal growth after 6 hours. The combination of gallic acid or extract with nystatin did not exhibit synergistic or antagonistic effect. Furthermore, the extract did not induce cytotoxicity to a human cell line. The extract of S. brasiliensis demonstrates antifungal activity against Candida, generally exhibiting fungicidal action and capacity to inhibit biofilm formation as well as reduce mature biofilms. Additionally, the extract showed low cytotoxicity to human cells.

Anti-Biofilm and Hemolytic Effects of Cymbopogon citratus (Dc) Stapf Essential Oil

Abstract Objective: To perform chemical analysis and to evaluate the anti-biofilm and hemolytic effect of the essential oil of Cymbopogon citratus. Material and Methods: Gaseous chromatography coupled to mass spectrometer was performed for chemical characterization of the essential oil. To verify the antimicrobial action, the Minimum Inhibitory Concentration (MIC), Minimum Bactericidal Concentration (MBC) and Minimum Fungicidal Concentration (MFC) were determined. From MIC, MBC and MFC data, concentrations were established to verify the anti-biofilm effect and for the hemolysis test on human erythrocytes. A multispecies biofilm was developed in vitro and mouthwash applications were simulated to determine the inhibition of biofilm formation or its removal. Results were analyzed through ANOVA statistical test, complemented by the Tukey test, considering a significance level of 5% Results: The major component of the essential oil is citral. MIC verified for Streptococcus mutans was 1mg / mL, while for Candida albicans, it was 125 μg/mL, presenting microbicidal effect for both microorganisms tested. The essential oil was able to inhibit biofilm formation (p<0.001), presenting non-toxic hemolysis percentage in concentration below 500 μg/mL Conclusion: The essential oil of Cymbopogon citratus is antimicrobial, antibiofilm and non-toxic to human erythrocytes, representing a natural product with potential for use in Dentistry.

Avaliação da localização de caninos superiores não irrompidos em radiografias panorâmicas digitais / Radiographic localization of unerupted maxillary canine

O presente estudo teve como objetivos avaliar a prevalência de caninos superiores não irrompidos, suas posições intraósseas e se há relação com a idade e o gênero. Foram avaliadas 100 radiografias panorâmicas digitais, no período compreendido entre os anos de 2009 a 2010. Para a coleta de dados foi utilizada uma ficha específica onde se registrou a idade, gênero e posicionamento dos elementos. Para análise da angulação e distância da cúspide do canino à crista do rebordo alveolar foi utilizado o programa Meazure®. Os resultados apontaram para uma prevalência de 61,1% para o gênero feminino, faixa etária entre 21 a 25 anos (44, 4%), unilateralidade (83, 3%) e posição mesioangular (77, 7%). Com respeito aos valores médios para as medidas de angulação dos caninos em relação a linha média e da distância da cúspide à crista do rebordo alveolar os resultados revelaram que as mulheres apresentam tanto angulação média (44,20) quanto distância média (9,30) superiores às medidas dos homens. Por fim, avaliando tais medições em relação à posição do canino, percebe-se que os dentes mesioangulares unilaterais têm angulação média menor (36,80) e distância média maior (10,56) que as dos dentes identificados nas posições vertical e horizontal. A média geral da angulação dos pacientes que apresentaram caninos não irrompidos unilaterais foi de 42,67° e com distância de 9,02mm. Desta forma, conclui-se que caninos não irrompidos são prevalentes em indivíduos jovens do gênero feminino, apresentando-se predominância unilateral e em posição mesioangular

The present study aimed to evaluate the prevalence of unerupted maxillary canines, the intraosseous position and the prevalence of unerupted canines related to age and gender. 100 digital panoramic radiographs were evaluated at the period between the years 2009-2010. A specific record were developed for collection data related to age, gender and placement of the elements. For analysis of the angle and canine distance of the cusp to the crest of the alveolar ridge Meazure® was used. The results showed a prevalence of females (61,1%), aged between 21-25 years (44,4%), unilateral (83,3%) and mesioangular position (77,7%). In respect to the average for measures of canine angulation in relation to the midline and the distance of the leaflet to the crest of the alveolar ridge values, the results revealed that women present both mean angulation (44.20) and average distance (9.30) superior to measures of men. Evaluating such measurements relative to the position of the canine, can be noted that the mesioangular teeth have unilateral lower mean angle (36.80) and greater average distance (10.56) that the teeth in vertical and horizontal position. The mean angulation of patients with unilateral unerupted canines was 42.67° and distance of 9.02 mm. Thus, it is concluded that unerupted canines are prevalent in young females, presenting predominantly unilateral and mesioangular position