Vernonia polyanthes Less. (Asteraceae Bercht. & Presl), a Natural Source of Bioactive Compounds with Antibiotic Effect against Multidrug-Resistant Staphylococcus aureus.

Vernonia polyanthes is a medicinal plant used to treat many disorders, including infectious diseases. This study investigated the chemical constituents and the antibacterial activity of V. polyanthes leaf rinse extract (Vp-LRE). The chemical characterization of Vp-LRE was established using ultra-high performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry (UHPLC/Q-TOF-MS), and glaucolide A was identified through 1H and 13C nuclear magnetic resonance (NMR) and mass fragmentation. The cytotoxicity was evaluated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT). The antibacterial activity was assessed by minimal inhibitory concentration and minimal bactericidal concentration. Interactions between ligands and beta-lactamase were evaluated via molecular docking. UHPLC/Q-TOF-MS detected acacetin, apigenin, chrysoeriol, isorhamnetin, isorhamnetin isomer, kaempferide, 3',4'-dimethoxyluteolin, 3,7-dimethoxy-5,3',4'-trihydroxyflavone, piptocarphin A and glaucolide A. Vp-LRE (30 µg/mL) and glaucolide A (10 and 20 µg/mL) were cytotoxic against RAW 264.7 cells. Glaucolide A was not active, but Vp-LRE inhibited the Staphylococcus aureus, methicillin-resistant S. aureus (MRSA), Escherichia coli, Salmonella Choleraesuis and Typhimurium, with a bacteriostatic effect. The compounds (glaucolide A, 3',4'-dimethoxyluteolin, acacetin and apigenin) were able to interact with beta-lactamase, mainly through hydrogen bonding, with free energy between -6.2 to -7.5 kcal/mol. These results indicate that V. polyanthes is a potential natural source of phytochemicals with a significant antibiotic effect against MRSA strains.

HIGH PREVALENCE OF NON-ADHERENCE TO ULCERATIVE COLITIS THERAPY IN REMISSION: KNOWING THE PROBLEM TO PREVENT LOSS.

BACKGROUND: Ulcerative colitis (UC) is a chronic inflammatory disease whose manifestations can drastically affect the individual's quality of life, and therefore adherence to treatment is important in order to keep it in remission. OBJECTIVE: To verify the prevalence of non-adherence and the influence of sociodemographic, clinical and pharmacotherapeutic characteristics associated with non-adherence to treatment of UC in remission. METHODS: Cross-sectional study conducted with 90 individuals diagnosed with UC in remission. The information was collected through interviews during medical consultations at Medical Clinic of Gastroenterology of Hospital Universitário da Universidade Federal de Juiz de Fora. To verify the association of the variables under study with the outcome of interest and its measure of association, Student's t-test or Pearson's chi-square non-parametric test (P<0.05) was used and prevalence ratio and confidence interval were calculated. RESULTS: A high prevalence of non-adherence (77.8%) was found among patients with UC in remission. The individuals most likely to not adhere to the treatment were those aged less than 50 years, who were not engaged in paid work, with high scores for anxiety and who used more than one medication as part of the treatment of UC. CONCLUSION: These findings reinforce that acknowledging the factors that influence the non-adherence behavior is of paramount importance for the development of strategies by health care professionals, assuring that those will be really effective to prolong, as much as possible, one of the most successful ways to maintain the UC remission period: the use of medications.

Elevada prevalência de não adesão ao tratamento da colite ulcerativa em remissão: conhecer o problema para prevenir o prejuízo / High prevalence of non-adherence to ulcerative colitis therapy in remission: knowing the problem to prevent loss

ABSTRACT Background Ulcerative colitis (UC) is a chronic inflammatory disease whose manifestations can drastically affect the individual's quality of life, and therefore adherence to treatment is important in order to keep it in remission. Objective To verify the prevalence of non-adherence and the influence of sociodemographic, clinical and pharmacotherapeutic characteristics associated with non-adherence to treatment of UC in remission. Methods Cross-sectional study conducted with 90 individuals diagnosed with UC in remission. The information was collected through interviews during medical consultations at Medical Clinic of Gastroenterology of Hospital Universitário da Universidade Federal de Juiz de Fora. To verify the association of the variables under study with the outcome of interest and its measure of association, Student's t-test or Pearson's chi-square non-parametric test (P<0.05) was used and prevalence ratio and confidence interval were calculated. Results A high prevalence of non-adherence (77.8%) was found among patients with UC in remission. The individuals most likely to not adhere to the treatment were those aged less than 50 years, who were not engaged in paid work, with high scores for anxiety and who used more than one medication as part of the treatment of UC. Conclusion These findings reinforce that acknowledging the factors that influence the non-adherence behavior is of paramount importance for the development of strategies by health care professionals, assuring that those will be really effective to prolong, as much as possible, one of the most successful ways to maintain the UC remission period: the use of medications.

RESUMO Contexto Colite ulcerativa é uma doença inflamatória crônica que pode apresentar manifestações graves que afetam drasticamente a qualidade de vida do indivíduo e, dessa maneira, a adesão ao tratamento é importante a fim de manter a doença em remissão. Objetivo Verificar a prevalência de não adesão e a influência de características sociodemográficas, clínicas e farmacoterapêuticas associadas a não adesão ao tratamento da colite ulcerativa em remissão. Métodos Estudo transversal envolvendo 90 indivíduos diagnosticados com colite ulcerativa em remissão. As entrevistas foram conduzidas durante as consultas médicas realizadas na Clínica Médica de Gastroenterologia do Hospital Universitário da Universidade Federal de Juiz de Fora. Para verificar a associação entre as variáveis com o desfecho de interesse, foi aplicado teste-t de Student ou teste não-paramétrico qui-quadrado de Pearson (P<0,05) e também razão de prevelência e intervalos de confiança foram calculados. Resultados Uma elevada prevalência de não adesão (77,8%) foi encontrada dentre os pacientes com colite ulcerativa em remissão. Os indivíduos mais propensos ao comportamento em questão foram aqueles com menos de 50 anos, sem trabalho remumerado, com escores mais elevados no teste de ansiedade e que utilizavam mais de um medicamento para o tratamento da colite ulcerativa. Conclusão Estes achados reforçam que o conhecimento de fatores que influenciam o comportamento de não adesão é de grande importância para o desenvolvimento de estratégias para a equipe de saúde, garantindo que estas sejam realmente eficazes para prolongar, tanto quanto possível, uma das formas mais bem-sucedidas de manter o período de remissão da colite ulcerativa: o uso de medicamentos.