Avaliação in vitro do potencial antifúngico de sais imidazólicos frente a Candida albicans

Aim: This study aims to evaluate the antifungal potential of imidazolium salts (IS) against Candida albicans. Material and methods: Antifungal evaluation of the IS was performed using the disk diffusion test, using a strain of Candida albicans (ATCC 90028). Five different IS were synthesized and tested in the present study: 1,8-bis(methylimidazolium-1-yl) octane bromide (MImC8MImBr2), 1,12-bis(methylimidazolium-1-yl) dodecane methanesulfonate (MImC12MIm(MeS)2), 1-n-hexadecyl-2,3-dimethylimidazolium chloride (C16DMImCl), 1,10-bis(methylimidazolium-1-yl) decane methanesulfonate (MImC10MIm(MeS)2) e 1,10-bis(methylimidazolium-1-yl) decane bromide (MImC10MImBr2). Cetylpyridinium chloride (C16PyrCl) was used as a reference substance. Chlorhexidine (C34H54Cl2N10O14) and saline (NaCl 0,9%) solutions were positive and negative controls, respectively. Results: Among the tested IS, MImC12MIm(MeS)2, MImC10MIm(MeS)2 and MImC10MImBr2 showed the following values for inhibition halos: 28,00 mm, 20,50 mm and 18,75 mm, respectively. These values were similar or superior than those found for the positive control (14.87 mm) and reference (0 mm) substances. Discussion: IS can be a promising alternative to antifungal conventional therapies, as exemplified in previous studies. However, further in vitro and in vivo studies are needed to assess the antifungal potential of these compounds against Candida-mixed biofilms. Conclusion: Based on these results, there are three in vitro promising antifungal potential against Candida albicans IS tested in this study.Objetivo: O objetivo deste estudo foi avaliar o potencial antifúngico de um conjunto de sais imidazólicos (SI) frente a Candida albicans. Materiais e métodos: A avaliação antifúngica dos SI foi realizada por meio do teste de difusão em ágar, utilizando uma cepa de Candida albicans (ATCC 90028). Cinco diferentes SI foram sintetizados e testados no presente estudo: brometo de 1,8-bis(metilimidazólio-1-il) octano (MImC8MImBr2), metanossulfonato de 1,12-bis(metilimidazólio-1-il) dodecano (MImC12MIm(MeS)2), cloreto de 1-n-hexadecil-2,3-dimetilimidazólio (C16DMImCl), metanossulfonato de 1,10-bis(metilimidazólio-1-il) decano (MImC10MIm(MeS)2) e brometo de 1,10-bis(metilimidazólio-1-il) decano (MImC10MImBr2). O cloreto de cetilpiridíneo (C16PyrCl) foi utilizado como composto de referência e as soluções de digluconato de clorexidina (C34H54Cl2N10O14) e salina (NaCl 0,9%) foram utilizadas como controles positivo e negativo, respectivamente. Resultados: Dentre os SI testados, MImC12MIm(MeS)2, MImC10MIm(MeS)2 e MImC10MImBr2 apresentaram os seguintes valores para os halos de inibição formados: 28,00 mm, 20,50 mm e 18,75 mm, respectivamente. Esses valores foram similares ou superiores inclusive aos encontrados para o controle positivo (14,87 mm) e o composto de referência (0 mm). Discussão: Os SI podem apresentar uma alternativa promissora às terapias com antifúngicos convencionais, concordando com estudos prévios. Entretanto, mais estudos in vitro e in vivo são necessários para avaliar o potencial antifúngico destes compostos frente a biofilmes multiespécies de C. albicans. Conclusão: Baseado nestes resultados, três dos SI testados apresentam atividade antifúngica in vitro promissora frente à Candida albicans

Social inequalities in mental disorders and substance misuse in young adults:a birth cohort study in Southern Brazil

Purpose To investigate the association between mental disorders and substance misuse at 30 years of age with gender, socioeconomic position at birth, and family income trajectories. Methods The 1982 Pelotas Birth Cohort was used; all 5914 children born alive at hospital were originally enrolled (99.2% of all city births). In 2012, 3701 subjects were located and interviewed (68% retention rate). Mental disorders and substance misuse were assessed, and their prevalence analysed according to gender, socioeconomic status at birth, and four different income trajectories: always poor, never poor, poor at birth/non-poor at age 30, and non-poor at birth/poor at age 30. Results While women presented higher prevalence of mental disorders, substance misuse was much more frequent among men. Individuals in the lowest income quintile at birth presented 2–5 times more mental disorders and substance misuse than those in the highest quintile. Young adults who were always poor or were not poor at birth but were poor at 30 years of age had a higher prevalence of mental disorders than the other groups. Conclusions The high rates of mental disorders and lifetime suicide attempts in young adults, especially those who were always poor or became poor after childhood, suggest that recent socioeconomic-related stressful situations may have a higher impact on the current mental health than events earlier in life. However, we could not identify at what specific ages socioeconomic changes were more important

Evolução temporal da terapia farmacológica baseada em evidência em pacientes com cardiopatia isquêmica e seu impacto sobre fatores de risco

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