In vitro and Quantitative and Structure Activity Relationship (QSAR) evaluation of the antifungal activity of terpenoid constituents of essential oils against Alternaria alternata and Fusarium oxysporum

Introducción. Los géneros Alternaria y Fusarium contienen especies patógenas para los humanos y los cultivos. Para su control, se han utilizado diversos antifúngicos. Sin embargo, su uso desmedido ha contribuido al desarrollo de agentes patógenos resistentes. Una alternativa para buscar y desarrollar nuevos agentes antimicóticos son los aceites esenciales y sus componentes principales, los cuales poseen diversas actividades biológicas de interés para la medicina y en la preservación de alimentos. Objetivo. Evaluar in vitro e in silico las actividades antifúngicas de terpenoides contra Alternaria alternata y Fusarium oxysporum. Materiales y métodos. Se evaluaron in vitro las concentraciones inhibitorias mínimas y las concentraciones fungicidas mínimas de 27 constituyentes de aceites esenciales contra A. alternata y F. oxysporum. Además, mediante algoritmos genéticos, se crearon modelos cuantitativos de la relación estructura-actividad para determinar las propiedades estructurales y fisicoquímicas relacionadas con la actividad antifúngica. Resultados. Los compuestos evaluados mostraron ser antifúngicos activos. El timol fue el compuesto con mayor actividad, con un valor de concentración inhibitoria mínima de 91.6 ± 28.8 pg/ml, tanto para Alternarla alternata como para Fusarium oxysporum. Los modelos cuantitativos de la relación estructura-actividad incluyeron la avidez por los lípidos y los fenoles como los principales grupos funcionales que contribuyen en la actividad antifúngica. Conclusión. Los terpenoides poseen actividades antifúngicas relevantes para ser incorporados en el estudio de la química medicinal. La inclusión de pruebas in silico a la evaluación in vitro es una herramienta útil para la búsqueda y el diseño racional de derivados terpénicos como posibles agentes antifúngicos.

Introduction. Fungal genera Alternaría and Fusarium include human and plant pathogenic species. Several antifungals have been used for their control, hut excessive use has contributed to resistance development in pathogens. An alternative to searching for and developing new antifungal agents is using essential oils and their main components, which have biological activities of interest in medicine and food production. Objective. To evaluate in vitro and in silico the antifungal activities of terpenoids against Alternaria alternata and Fusarium oxysporum. Materials and methods. The minimum inhibitory concentration and minimum fungicidal concentration values of 27 constituents of essential oils used against Alternaria alternata and Fusarium oxysporum were evaluated in vitro. In addition, using genetic algorithms, quantitative models of the structure-activity relationship were used to identify the structural and physicochemical properties related to antifungal activity. Results. The evaluated compounds proved to be effective antifungals. Thymol was the most active with a minimum inhibitory concentration of 91.6 ± 28.8 pg/ml for A. alternata and F. oxysporum. Quantitative structure-activity relationship models revealed the octanol-water cleavage ratio as the molecular property, and the phenols as the main functional group contributing to antifungal activity. Conclusion. Terpenoids exhibit relevant antifungal activities that should be incorporated into the study of medicinal chemistry. Inclusion of in silico assays in the in vitro evaluation is a valuable tool in the search for and rational design of terpene derivatives as new potential antifungal agents.

Melaleuca armillaris essential oil as an odor reducer in intestinal ostomy bags: a semi-experimental study / Aceite esencial de Melaleuca armillaris reductor de olores en bolsas de ostomía intestinal: estudio cuasi-experimental / Óleo essencial de Melaleuca armillaris redutor de odor em bolsas de estomia intestinal: estudo quase experimental

ABSTRACT Objective: Evaluate the effect of essential oil in odor reduction for intestinal ostomy bags. Method: Primary study, semi-experimental, prospective clinical trial with quantitative approach. A product prepared with Melaleuca armillaris leaves was tested in ostomy pouches, with and without effluents, for adhesion and odor control. Instrument: Labeled Magnitude Scale. Results: Colostomized participants, with a mean age of 73 ± 14.94, predominantly males; and informal caregivers, with a mean age of 44 ± 8.98, predominantly females. In the visual evaluation of the oil, 100% of the participants perceived its adherence. Regarding the evaluation of effluent odor by the colostomized, five reported "strong odor" before oil use and, six reported "weak" odor after use (p = 0.005). Five informal caregivers reported "very strong" effluent odor before oil use; and one reported "weak" and nine reported "moderate" after use (p = 0.0025). Conclusion: There was a reduction in the odor of effluents in the ostomy pouches with the essential oil of Melaleuca armillaris at 10%. Application for patent registration in the Brazilian National Institute of Industrial Property (INPI) under no. BR 10 2020 026987 9.

RESUMEN Objetivo: Evaluar el efecto del aceite esencial en la reducción del olor en bolsas de ostomía intestinal. Método: Estudio primario, ensayo clínico cuasi-experimental, prospectivo de tipo cuantitativo. Se evaluó un preparado con hojas de Melaleuca armillaris, probado en bolsas de recogida con y sin efluentes, en cuanto a adherencia y olor. Se aplicó como instrumento la Escala de Magnitud Etiquetada. Resultados: Los participantes colostomizados tenían edad media de 73 años ± 14,94, con predominio del sexo masculino, y los cuidadores informales, edad media de 44 años ± 8,98 y prevalencia mayor para el sexo femenino. En la evaluación visual del aceite, el 100% de los participantes notaron la adherencia. Respecto a la evaluación del olor del efluente por los pacientes colostomizados, cinco reportaron sentir un "olor fuerte" antes de usar el aceite y, después del uso, seis reportaron sentir un olor "débil" (p = 0,005). Cinco cuidadores informales detectaron un olor "muy fuerte" de los efluentes antes de usar el aceite y, después de usarlo, uno sintió un olor "débil" y nueve "moderado" (p = 0,0025). Conclusión: El olor de los efluentes en las bolsas de recolección con el aceite esencial de Melaleuca armillaris se redujo en un 10%. Solicitud de registro de patente ante el INPI bajo el n. BR 10 2020 026987 9.

RESUMO Objetivo: Avaliar o efeito do óleo essencial na redução de odor em bolsas de estomia intestinal. Método: Estudo primário, ensaio clínico quase experimental, prospectivo, com abordagem quantitativa. Preparado com folhas de Melaleuca armillaris, foi testado em bolsas coletoras, sem e com efluentes, quanto à aderência e odor. Instrumento: escala de magnitude rotulada. Resultados: Participantes colostomizados, com média de 73 anos ± 14,94, predomínio do sexo masculino; e cuidadores informais, com média de 44 anos ± 8,98, predomínio do sexo feminino. Na avaliação visual do óleo, 100% dos participantes perceberam a aderência. Em relação à avaliação do odor dos efluentes pelos colostomizados, cinco relataram "odor forte" antes do uso do óleo e, após o uso, seis relataram odor "fraco" (p = 0,005). Cinco cuidadores informais detectaram odor "muito forte" dos efluentes antes do uso do óleo e, após o uso, um "fraco" e nove "moderado" (p = 0,0025). Conclusão: Houve redução do odor dos efluentes nas bolsas coletoras com o óleo essencial de Melaleuca armillaris a 10%. Pedido registro de patente no INPI sob nº. BR 10 2020 026987 9.

Essential oils for healing and/or preventing infection of surgical wounds: a systematic review / Aceites esenciales para la cicatrización y/o prevención de infecciones de heridas quirúrgicas: una revisión sistemática / Óleos essenciais para a cicatrização e/ou prevenção de infecção de feridas cirúrgicas: revisão sistemática

ABSTRACT Objective: To analyze the evidence available in the literature on the use of essential oils for healing and/or preventing infection in surgical wounds. Method: Systematic review according to the JBI model and PRISMA statement. The search was carried out in November/2020 and updated in December/2021, using descriptors and keywords, in the CINAHL, LILACS, CENTRAL, EMBASE, PUBMED, Scopus, and Web of Science databases. The quality of the evidence was assessed using the JBI critical appraisal tool for randomized controlled trials. Results: Five publications were included. Three studies evaluated healing and the presence of infection after episiotomy using the Redness-Edema-Ecchymosis-Discharge-Approximation (REEDA) scale; one study evaluated healing after periodontal surgery using the plaque index and Modified Gingival Index; the other four studies considered the presence of infection after episiotomy. Most studies used lavender oil, associated or not with other oils (80%). Two studies showed an improvement in healing. The infection outcome, although mentioned by 60% of studies, was not assessed as a primary outcome. Conclusion: The promising efficacy of essential oils, especially lavender, was verified in the healing of surgical wounds, especially in episiotomies.

RESUMEN Objetivo: Analizar la evidencia en la literatura sobre el uso de aceites esenciales para la cicatrización y/o prevención de infecciones en heridas quirúrgicas. Método: Revisión sistemática de acuerdo con el modelo JBI y el PRISMA. Se realizó una búsqueda en las bases de datos CINAHL, LILACS, CENTRAL, EMBASE, PUBMED, Scopus y Web of Science, en el periodo de noviembre/2020, con actualizaciones en diciembre/2021, utilizando descriptores y palabras clave. La calidad de la evidencia se evaluó por la herramienta JBI critical appraisal para ensayos controlados aleatorizados. Resultados: Se incluyeron cinco publicaciones. Tres estudios evaluaron la curación y la presencia de infección tras episiotomía mediante la escala REEDA (Redness-Edema-Ecchimosis-Discharge-Approximation); uno evaluó la curación después de cirugía periodontal utilizando el índice de placa y el índice gingival modificado; y los demás consideraron la presencia de infección posterior a la episiotomía. La mayoría de los estudios utilizaron aceite de lavanda, asociado a otros aceites o no (80%). Dos estudios demostraron mejorar la cicatrización. El resultado infección, aunque mencionado por el 60% de los estudios, no se evaluó como resultado primario. Conclusión: Se verificó la prometedora eficacia de los aceites esenciales, especialmente el de lavanda, en la cicatrización de heridas quirúrgicas, especialmente en episiotomías.

RESUMO Objetivo: Analisar as evidências disponíveis na literatura sobre o uso de óleos essenciais para a cicatrização e/ou prevenção de infecção em feridas cirúrgicas. Método: Revisão sistemática segundo modelo JBI e declaração PRISMA. Busca realizada em novembro/2020 e atualizada em dezembro/2021, utilizando-se descritores e palavras-chave, nas bases CINAHL, LILACS, CENTRAL, EMBASE, PUBMED, Scopus e Web of Science. A qualidade das evidências foi avaliada usando a ferramenta JBI critical appraisal para ensaios clínicos randomizados. Resultados: Cinco publicações foram incluídas. Três estudos avaliaram a cicatrização e presença de infecção após episiotomia por meio da escala REEDA (Redness-Edema-Ecchymosis-Discharge-Approximation); um avaliou cicatrização após cirurgia periodontal por meio do índice de placa e Índice Gengival Modificado; o restante considerou a presença de infecção após episiotomia. A maioria dos estudos utilizou o óleo de lavanda, associado ou não a outros óleos (80%). Em dois estudos houve melhora da cicatrização. O desfecho infecção, embora mencionado por 60% estudos, não foi avaliado como primário. Conclusão: Verificou-se a eficácia promissora de óleos essenciais, sobretudo do de lavanda, na cicatrização de feridas cirúrgicas, especialmente em episiotomias.

Uso dos óleos essenciais em onicomicose: revisão integrativa / Use of essential oils in onychomycosis: an integrative review / Uso de aceites esenciales en onicomicosis: revisión integrativa

Objetivo:identificar na literatura como os óleos essenciais são utilizados em onicomicose. Métodos: revisão integrativa com buscas realizadas nas bases de dados MEDLINE/PubMed, Web of Science, Cochrane, SCOPUS e BVS, sendo 13 estudos analisados. Resultados: o uso de óleos essenciais Melaleucaalternifólia, Lavandulaangustifólia, Eucalyptuscitriodora e Foeniculumvulgare mostram-se eficazes e trazem benefícios no tratamento da onicomicose, por inibirem o crescimento micelial dos fungos infectantes das unhas. Sendo assim, os profissionais de saúde envolvidos nos cuidados em pessoas com onicomicose devem se manter atualizados sobre tais alternativas de tratamento e consequentemente da melhora da assistência prestada a esses pacientes. Conclusão: a eficácia antifúngica de uma variedade de óleos foi comprovada com diferentes formas de apresentação e possíveis associações. Entretanto, o nível da evidência apresentado foi baixo, o que justifica a necessidade de estudos mais robustos sobre a temática.

Objective:identify in the literature how essential oils are used in onychomycosis. Methods:integrative review with searches performed in the MEDLINE/PubMed, Web of Science, Cochrane, SCOPUS and BVS databases, with 13 studies analyzed. Results: the use of essential oils Melaleuca alternifolia, Lavandula angustifolia, Eucalyptus citriodora and Foeniculum vulgare are effective and bring benefits in the treatment of onychomycosis, as they inhibit the mycelial growth of the nail fungus. Therefore, health professionals involved in the care of people with onychomycosis must keep themselves updated on such treatment alternatives and, consequently, on improving the care provided to these patients. Conclusion: the antifungal efficacy of a variety of oils has been proven with different forms of presentation and possible associations. However, the level of evidence presented was low, which justifies the need for more robust studies on the subject

Objetivo:Identificar en la literatura cómo se utilizan los aceites esenciales en la onicomicosis. Métodos: Revisión integrativa, con búsquedas realizadas en las bases de datos MEDLINE / PubMed Web of Science, Cochrane, SCOPUS y VHL, donde se analizaron 13 estudios. Resultados: El uso de los aceites esenciales Melaleuca alternifolia, Lavandula angustifolia, Eucalyptus citriodora y Foeniculum vulgare resulta eficaz y aporta beneficios en el tratamiento de la onicomicosis ya que inhiben el crecimiento micelial del hongo ungueal. Así, los profesionales sanitarios implicados en la atención de las personas con onicomicosis onicomicosis deben mantenerse actualizados sobre dichas alternativas de tratamiento y, en consecuencia, sobre la mejora de la atención que se brinda a estos pacientes. Conclusión: La eficacia antifúngica de una variedad de aceites ha sido probada con diferentes formas de presentación y posibles asociaciones. Sin embargo, el nivel de evidencia presentado fue bajo, lo que justifica la necesidad de estudios más robustos sobre el tema

Chemical composition, antimicrobial and antifungal activity of Lippia Thymoide essential oil in oral pathogens

Aim: This study evaluated the chemical composition of Lippia thymoides (Lt) essential oil and its antimicrobial activity against fungal strains of Candida albicans (Ca) and Gram-negative bacteria Prevotella intermedia (Pi) and Fusobacterium nucleatum (Fn). Methods: Lt essential oil was obtained by hydrodistillation apparatus with a modified Clevenger extension. The chemical analysis was analyzed by gas phase chromatography and mass spectrometry on Shimadzu QP 2010 plus. Sample sensitivity evaluation was performed by ABHb-inoculum and culture plates were developed with triphenyltetrazolium chloride, also Fn and Pi samples analysis were in anaerobic environment and Ca sample analysis was performed in aerobic environment. The minimum inhibitory concentration (CIM) was determinated by microdilution in eppendorfs tubes. Results: The chemical analysis showed that Thymol (59,91%) is the main compound found in Lt essential oil, also other antifungal and antimicrobial agents were present γ-terpinene (8.16%), p-cymene (7.29%) and ß-caryophyllene (4.49%), Thymol is a central ingredient of many medicinal plants and has a potent fungicidal, bactericidal and antioxidant activity, it has been previously shown to have anti-inflammatory activity against Periodontal Disease (PD) cause can reduces prostanoids, interleukins, leukotrienes levels in periodontium. CIM result Pi was 6.5 µg/mL, Fn was 1.5 µg/mL and Ca was 0.19 µg/mL. Conclusion: The antimicrobial activity of L. thymoides, through the compound Thymol, has been shown promising potential against gram-negative periodontopathogenic bacteria and fungi whose therapeutic arsenal is still very restricted

Antimicrobial potential of essential oils mouthrinses with and without alcohol: a randomized clinical trial

Aim: This study aimed to compare the microbiological potential and gustatory perception of essential oils (EO) mouthrinses containing and not containing alcohol. Methods: Twenty healthy adult volunteers rinsed with 10mL of the following test solutions: EO with alcohol, EO without alcohol, or a control solution (saline solution with mint essence). A washout period of at least seven days was adopted after a single-use protocol of the respective solution. All participants used all three tested substances. Antimicrobial potential was assessed by counting salivary total viable bacteria both before and after each rinse. Gustatory perception was evaluated using the Visual Analogue Scale (VAS). Multiple comparisons were performed with the Wilcoxon test, using Bonferroni correction. Results: Both EO solutions presented a higher antimicrobial potential in comparison to the control solution (p<0.017). However, no significant difference in antimicrobial potential was observed between EO containing or not containing alcohol (p=0.218). VAS of EO with alcohol (median: 2.7) was similar to control solution (median: 1.6) (p=0.287). A better gustatory perception was observed of the EO without alcohol (median 7.6) when compared to the control solution (p<0.0001). When EO groups were compared, EO without alcohol also demonstrated a significantly better gustatory perception (p=0.001). Conclusion: Mouthrinse containing EO without alcohol presented a better taste perception when compared to the EO with alcohol, but no difference was observed in the antimicrobial potential of both EO solutions after a single rinse protocol

Efeito antibiofilme e citotoxicidade do hidróxido de cálcio associado ao óleo essencial de Melaleuca alternifolia / Antibiofilm effect and cytotoxicity of calcium hydroxide associated with the Melaleuca alternifolia essential oil

Objetivo: Avaliar e comparar os efeitos antimicrobiano e antibiofilme, e a citotoxicidade promovida pela associação do hidróxido de cálcio ao óleo essencial de Melaleuca alternifolia (MA), em diferentes concentrações, e ao propilenoglicol (PG). Métodos: As seguintes medicações compuseram os grupos experimentais: G1) HC/MA 1%; G2) HC/MA 5%; G3) HC/MA 10%; G4) HC/MA 20%; e G5) HC/PG. Solução salina 0,85% e meio DMEM serviram como controle nos testes antimicrobianos e de citotoxidade em fibroblastos do ligamento periodontal humano (FbLP), respectivamente. A atividade antimicrobiana (n = 12) foi avaliada por meio do teste de difusão em ágar. O efeito antibiofilme (n = 12) imediato das medicações foi avaliado por meio do teste de viabilidade bacteriana em biofilmes de 72 horas de E. faecalis, formados sobre discos de dentina e tratados por sete dias com as medicações. Após a coleta microbiológica do biofilme remanescente, os discos de dentina foram imersos em meio estéril e armazenados por mais sete dias, para a análise do efeito antibiofilme residual das medicações, quando nova coleta microbiológica foi realizada. A atividade metabólica de FbLP foi avaliada por meio do ensaio colorimétrico MTS (n = 9). Os valores médios dos halos de inibição, em mm, das unidades formadoras de colônia, e o percentual de atividade metabólica celular foram analisados pelos testes Kruskal-Wallis e post hoc Dunn (α = 5%). Resultados:Todas as medicações experimentais apresentaram superior ação antimicrobiana e antibiofilme comparadas ao controle, solução salina (p < 0,05), e mantiveram viáveis os FbLP, semelhante ao controle DMEM (p > 0,05). Conclusão: A associação do óleo essencial de Melaleuca alternifolia, nas concentrações de 1%, 5%, 10% e 20%, ao hidróxido de cálcio promoveu excelente ação antimicrobiana, antibiofilme e biocompatibilidade com fibroblastos, de forma semelhante à associação com propilenoglicol.

Aim:To evaluate and compare the antimicrobial and antibiofilm effect, as well as the cytotoxicity of calcium hydroxide (CH) associated with the Melaleuca alternifolia (MA)essential oil, in different concentrations, and with propylene glycol. Methods: The following medications composed the experimental groups: G1) CH/MA 1%; G2) CH/MA 5%; G3) CH/MA 10%; G4) CH/MA 20%; and G5) CH/PG. Saline solution and culture medium DMEM were used as a control in antimicrobial and cytotoxicity tests in human periodontal ligament fibroblasts (PDLF), respectively. The antimicrobial activity (n = 12) was evaluated by the disk-diffusion agar method. The immediate antibiofilm effect (n = 12) of the medications was evaluated for bacterial viability in 72 hours-biofilms of E. faecalis, formed on the dentin disc surface and treated for seven days with medications. After microbiological sampling of the remaining biofilm, the dentin discs were immersed in sterile culture medium and stored for another seven days, for analysis of the residual antibiofilm effect of the medications, when a new microbiological sampling was performed. PDLF viability was evaluated by MTS colorimetric assay (n = 9). The mean values of the inhibition halos, in mm, the colony forming units, and the metabolic cell activity percentage were analyzed by means of Kruskal-Wallis and post hoc Dunn (α = 5%) tests. Results:All of the experimental medications presented higher antimicrobial and antibiofilm effects, when compared to the saline solution control (p < 0.05), and maintained the PDLF feasible, similar to the DMEM control (p > 0.05). Conclusions:The association of the Melaleuca alternifolia essential oil, at concentrations of 1%, 5%, 10%, and 20%, with calcium hydroxide promoted an excellent antimicrobial and antibiofilm activity, and biocompatibility with fibroblasts, similarly to the association with propylene glycol.

O uso de óleos essenciais no trabalho de parto e parto: revisão de escopo / The use of essential oils in labor and childbirth: scope review / El uso de aceites esenciales en el nacimiento y en el trabajo de parto: revisión de su alcance

OBJETIVO: descrever o estado atual dos conhecimentos sobre o uso de óleos essenciais no trabalho de parto e parto. MÉTODO: realizou-se revisão da literatura com o método scoping review, nas bases CINAHL, PubMed e Scopus, entre agosto de 2008 e agosto de 2018. Incluíram-se estudos experimentais, quasi-experimentais, controlados randomizados, não randomizados controlados, antes e depois de estudos e séries temporais interrompidas. Além disso, estudos observacionais analíticos, incluindo estudos prospectivos e retrospectivos de coorte, estudos caso-controle e estudos analíticos transversais foram considerados. Esta revisão também considerou projetos de estudos observacionais descritivos, incluindo séries de casos, relatos de casos individuais e estudos descritivos de corte transversal para inclusão. Foram também considerados estudos qualitativos de diferentes desenhos de pesquisa. RESULTADOS: a revisão abrangeu oito estudos publicados entre 2010 e 2018, com enfoque na publicação pelo Oriente. Da análise, diversos óleos essenciais foram citados, bem como sua forma de aplicação, em destaque para a lavanda. A utilização dos óleos essenciais resumiu-se nas seguintes finalidades: diminuição da dor e da ansiedade, melhora da satisfação materna e diminuição da duração do trabalho de parto, náusea e vômito. CONCLUSÃO: os óleos essenciais podem ser uma alternativa adicional para as parturientes, pela sua eficácia para aliviar a dor, ansiedade, melhora da satisfação, simplicidade de uso, baixo custo e por não serem invasivos.(AU)

Objective: to describe the current state of knowledge about the use of essential oils in labor and childbirth. Method: a literature review was performed using the scoping review method in the CINAHL, PubMed, and Scopus databases between August 2008 and August 2018. We included experimental, quasi-experimental, randomized controlled, nonrandomized controlled trials before and after the study, and interrupted time series. In addition, observational analytical studies including prospective and retrospective cohort studies, case-control studies and cross-sectional analytical studies were considered. This review also considered descriptive observational study designs, including case series, individual case reports, and descriptive cross-sectional studies for inclusion. Qualitative studies of different research designs were also considered. Results: the review covered eight studies published between 2010 and 2018, focusing on publication by the Orient. From the analysis, several essential oils were cited, as well as their application, especially for lavender. The use of essential oils was summarized for the following purposes: decreased pain and anxiety, improved maternal satisfaction and decreased duration of labor, nausea and vomiting. Conclusion: Essential oils may be an additional alternative for pregnant women because of their effectiveness in relieving pain, anxiety, improved satisfaction, simplicity of use, low cost and non-invasive.(AU)

Objetivo: describir el estado actual del conocimiento sobre el uso de aceites esenciales en el trabajo de parto y en el parto. Método: se realizó una revisión de la literatura utilizando el método scoping review en las bases de datos CINAHL, PubMed y Scopus entre agosto de 2008 y agosto de 2018. Se incluyeron ensayos experimentales, cuasi-experimentales, controlados aleatorios, no aleatorios controlados antes y después de estudios y series temporales interrumpidas. Además, se consideraron estudios observacionales analíticos que incluyeron estudios de cohorte prospectivo y retrospectivo, estudios de casos y controles y estudios analíticos transversales. Esta revisión también consideró proyectos de estudios observacionales descriptivos incluyendo series de casos, informes de casos individuales y estudios descriptivos de corte transversal para su inclusión. También se consideraron estudios cualitativos de diferentes diseños de investigación. Resultados: la revisión incluyó ocho estudios publicados entre 2010 y 2018, centrándose en la publicación de Oriente. Se mencionaron varios aceites esenciales, así como su aplicación, especialmente para la lavanda. El uso de aceites esenciales se resumió para los siguientes propósitos: disminución del dolor y la ansiedad, mejora de la satisfacción materna y disminución de la duración del parto, náuseas y vómitos. Conclusión: los aceites esenciales pueden ser una alternativa adicional para las mujeres embarazadas debido a su efectividad para aliviar el dolor, disminuir la ansiedad, mejorar la satisfacción, su simplicidad de uso, el bajo coste y por no ser invasivos.(AU)

Insecticidal action of synthetic girgensohnine analogues and essential oils on Rhodnius prolixus (Hemiptera: Reduviidae) / Acción insecticida de análogos sintéticos de girgensohnina y de aceites esenciales sobre Rhodnius prolixus (Hemiptera: Reduviidae)

ABSTRACT Introduction: The alkaloid girgensohnine has been used as a natural model in the synthesis of new alkaloid-like alpha-aminonitriles with insecticidal effect against disease vectors. Objective: To evaluate the biocide activity of girgensohnine analogues and essential oils of Cymbopogon flexuosus, Citrus sinensis and Eucalyptus citriodora in stage I and stage V Rhodnius prolixus nymphs. Materials and methods: We used a topical application model in tergites and sternites, as well as exposure to treated surfaces with different exploratory doses of each of the molecules and essential oils to determine the lethal doses (LD50 and LD95). Results: Analogue 3 showed the highest insecticidal activity with 83.3±16.7% of mortality when applied on tergites, 38.9±4.8% on sternites and 16.7±0% on treated surfaces in stage I nymphs at 72 hours (h) and 500 mg.L-1. In stage V nymphs, the compounds induced mortality only in sternums (11.1±9.6% for analogue 6 and 5.5±4.7% for analogues 3 and 7 at 72 h and 1500 mg.L-1). The lethal doses for molecule 3 on tergites in stage I nymphs were LD50 225.60 mg.L-1 and LD95 955.90 mg.L-1. The insecticidal effect of essential oils was observed only in stage I nymphs, with 11.1±4.8% for C. flexuosus when applied in sternites, while using exposure to surfaces treated it was 5.6±4.8% for C. sinensis applied on tergites and 8.3±0% on sternites at 72 h and 1000 mg.L-1. Conclusion: Synthetic girgensohnine analogues, and C. flexuosus and C. sinensis essential oils showed insecticidal activity in R. prolixus. Analogue 3 showed the greatest insecticidal activity among all molecules and oils evaluated under our laboratory conditions.

RESUMEN Introducción. El alcaloide natural girgensohnina se ha usado como modelo en la síntesis de nuevos análogos de alcaloidales alfa-aminonitrílicos con efecto insecticida en vectores de enfermedades. Objetivo. Evaluar la actividad biocida de análogos de girgensohnina y de aceites esenciales de las plantas Cymbopogon flexuosus, Citrus sinensis y Eucalyptus citriodora en ninfas de estadios I y V de Rhodnius prolixus. Materiales y métodos. Se empleó la aplicación tópica en terguitos, esternitos y superficies tratadas con diferentes dosis exploratorias de cada una de las moléculas y aceites esenciales para determinar las dosis letales (LD50 y LD95). Resultados. El análogo 3 tuvo la mayor actividad insecticida, con una mortalidad de 83,3±16,7% en los terguitos, de 38,9±4,8 % en los esternitos y de 16,7±0 % a las 72 horas en ninfas de estadioI expuestas a superficies tratadas y 500 mg.L-1. En las ninfas de estadio V solo se presentó mortalidad en los esternitos (11,1±9,6 % con el análogo 6 y 5,5±4,7 % con los análogos 3 y 7 a las 72 h y 1.500 mg.L-1). Las dosis letales para la molécula 3 en los terguitos de ninfas de estadio I fueron las siguientes: DL50, 225,60 mg.L-1 y DL95, 955,90 mg.L-1. En cuanto a los aceites esenciales, el efecto insecticida solo se presentó con C. flexuosus (11,1±4,8%) en los esternitos de ninfas de estadio I expuestas a superficies tratadas; con C. sinensis (5,6±4,8%) en los terguitos y en los esternitos (8,3±0%) a las 72 horas y 1.000 mg.L-1. Conclusión. Los análogos sintéticos del alcaloide girgensohnina y los aceites esenciales de C. flexuosus y C. sinensis exhibieron actividad insecticida en R. prolixus. El análogo 3 exhibió la mayor actividad insecticida de todas las moléculas evaluadas bajo las condiciones de laboratorio.

Aceites esenciales y sus componentes como una alternativa en el control de mosquitos vectores de enfermedades / Essential oils and their components as an alternative in the control of mosquito vectors of disease

Resumen Más de la mitad de la población humana está expuesta a contraer infecciones transmitidas por mosquitos. El cambio climático y la aparición de cepas resistentes a los insecticidas tradicionalmente utilizados han motivado la búsqueda de nuevos agentes capaces de controlar las poblaciones de mosquitos. Los aceites esenciales han resultado ser eficaces agentes repelentes y larvicidas. El objetivo de este trabajo fue revisar las investigaciones llevadas a cabo en los últimos años sobre la actividad larvicida de los aceites esenciales y sus componentes contra mosquitos de los géneros Aedes, Anopheles y Culex, así como los últimos reportes sobre su posible mecanismo de acción.

Abstract More than half of the human population is exposed to mosquito-borne infections. Climate change and the emergence of strains resistant to traditionally used insecticides have motivated the search of new agents for mosquito population control. Essential oils have been effective repellents and larvicidal agents. The aim of this work was to review research studies conducted in recent years on the larvicidal activity of essential oils and their components against Aedes, Anopheles and Culex mosquitoes, as well as the latest reports about their possible mechanism of action.

Investigação oftalmológica pré-clínica do óleo essencial de Origanum vulgare L. Lamiaceae / Ophthalmological pre-clinical research about essential oil from the Origanum vulgare L. Lamiaceae

RESUMO Objetivo: Avaliar a irritação ocular aguda em coelhos, após a administração tópica de óleo essencial. Métodos: Para tanto, os animais foram divididos em três grupos, cada um com três coelhos, totalizando 6 olhos por grupo, e a diferença entre eles foi a concentração utilizada ( 1, 3 e 9%). Aplicou-se no saco conjuntival, de um dos olhos do animal, uma dose única de 0,1 ml do produto e o olho contralateral foi usado como controle. Analisou-se os efeitos causados pelo óleo essencial na conjuntiva, íris e córnea após 1, 24, 48, 72 horas e no final do sétimo dia após a aplicação tópica. As avaliações oftalmológicas foram feitas com o auxílio de um oftalmoscópio binocular indireto com e sem fluoresceína. As reações observadas foram graduadas segundo a escala de Draize. Foram realizados exames anatomopatológicos em todos os olhos estudados no final do experimento. Resultados: No grupo de animais submetidos à instilação ocular do óleo essencial a 1%, não se observou alterações. O tratamento com o óleo a 3% provocou alteração conjuntival no exame feito em 1 hora, o que foi reduzindo. A administração do óleo essencial a 9% induziu hiperemia conjuntival, não havendo qualquer alteração nos outros tempos de avaliação oftalmológica. Conclusão: A avaliação contribuiu para conhecer as alterações clínicas na superfície ocular. Desta forma, foi possível classificar o óleo a 1% como não irritante e nas concentrações de 3 e 9% como pouco irritante, tornando possível estudos clínicos, a fim de estabelecer o óleo como alternativa terapêutica em conjuntivites bacterianas.

ABSTRACT Objective: To evaluate acute eye irritation in rabbits following topical administration of essential oil. Methods: animals were divided into three groups, each containing three rabbits, with a total of 6 eyes per group. The difference between them was the concentration used (1, 3 and 9%). A single dose of 0.1 ml of the product was applied into the conjunctival sac of one eye of the animal, and the contralateral eye was used as control. The effects caused by the essential oil in the conjunctiva, iris and cornea were analyzed after 1, 24, 48 and 72 hours and at the end of the seventh day after topical application. Ophthalmologic evaluations were performed with the aid of a binocular indirect ophthalmoscope fluorescein and with and without the observed responses, before being graded according to the Draize scale. Pathological examinations were performed on all eyes studied at the end of the experiment. Results: in the group of animals subjected to the ocular instillation of 1% essential oil, there was no change. For treatment with 3% oil, conjunctival changes were found to be decreasing during the examination after 1 hour. Administration of the 9%essential oil induced conjunctival injection, without any change in the other ophthalmologic evaluation times. Conclusion: the evaluation contributed to meet the clinical changes in the ocular surface. Thus, it was possible to classify the oil at 1% as non-irritating and the concentration of 3% and 9 as mildly irritating, making it possible for clinical studies to establish the oil as an alternative therapy in bacterial conjunctivitis.

Aromatherapy and nursing: historical and theoretical conception / Aromaterapia y enfermería: concepción histórico-teórica / Aromaterapia e enfermagem: concepção histórico-teórica

Abstract Aromatherapy is a Practical or Complementary Health Therapy that uses volatile concentrates extracted from plants called essential oils, in order to improve physical, mental and emotional well-being. Aromatherapy has been practiced historically and worldwide by nurses and, as in Brazil is supported by the Federal Nursing Council, it is relevant to discuss this practice in the context of Nursing through Theories of Nursing. This study of theoretical reflection, exploratory and descriptive, aims to discuss the pharmacognosy of essential oils, the historical trajectory of Aromatherapy in Nursing and the conceptions to support Aromatherapy in light of eight Nursing Theorists (Florence Nightingale, Myra Levine, Hildegard Peplau, Martha Rogers, Callista Roy, Wanda Horta, Jean Watson and Katharine Kolcaba), contributing to its inclusion as a nursing care practice.

Resumen La Aromaterapia es una Práctica o Terapia Complementaria de salud que utiliza concentrados volátiles extraídos de plantas, los llamados aceites esenciales, con el fin de mejorar el bienestar físico, mental y emocional. La Aromaterapia ha sido practicada histórica y mundialmente por Enfermeros y, a la vista de que su empleo en Brasil tiene respaldo del Consejo Federal de Enfermería, se hace relevante discutir dicha práctica en el marco de la Enfermería mediante las Teorías de la Enfermería. El presente estudio de reflexión teórica, exploratorio y descriptivo tiene como objetivo discurrir acerca de la farmacognosia de los aceites esenciales, la trayectoria de la Aromaterapia en la Enfermería y fundamentar la Aromaterapia a la luz de ocho Teóricos de la Enfermería (Florence Nightingale, Myra Levine, Hildegard Peplau, Martha Rogers, Callista Roy, Wanda Horta, Jean Watson y Katharine Kolcaba), contribuyendo a su inserción como práctica asistencial de la profesión.

Resumo A Aromaterapia é uma Prática ou Terapia Complementar de saúde que utiliza concentrados voláteis extraídos de plantas, os chamados óleos essenciais, com a finalidade de melhorar o bem-estar físico, mental e emocional. A Aromaterapia tem sido praticada histórica e mundialmente por Enfermeiros e, visto que no Brasil sua utilização possui respaldo pelo Conselho Federal de Enfermagem, torna-se relevante discutir essa prática no contexto da Enfermagem por meio das Teorias da Enfermagem. O presente estudo de reflexão teórica, exploratório e descritivo, tem como objetivo discorrer sobre a farmacognosia dos óleos essenciais, a trajetória histórica da Aromaterapia na Enfermagem e fundamentar a Aromaterapia à luz de oito Teoristas de Enfermagem (Florence Nightingale, Myra Levine, Hildegard Peplau, Martha Rogers, Callista Roy, Wanda Horta, Jean Watson e Katharine Kolcaba), contribuindo para a sua inserção como prática assistencial da profissão.

Effect of elemene on the expressions of TRAF6 and caspase-8 in H22 liver tumor tissues of mice / 中国医师杂志

Objective To investigate the effect of elemene on mRNA expressions of tumor necrosis factor (TNF) receptor associated factor 6 (TRAF6) and caspase-8 in tumor tissues of mice bearing hepatoma H22.Methods Forty BALB/c mice models bearing hepatoma H22 were established by subcutaneous inoculating tumor cells.Forty BALB/c mice were randomly divided into 4 groups:model group,low-and high-elemene dosage groups,and cisplatin group.The tumors after executing mice were weighted.The mRNA expressions of TRAF6 and caspase-8 in tumor tissues were detected by quantitative real-time reversetranscription polymerase chain reaction (RT-PCR).Results The dosage of elemene could inhibit tumor growth.The inhibition ratio of cancer in the low-and high-elemene dosage and cisplatin group was 24.2％,27.4％,and 28.2％,respectively.It reduced significantly tumor weights(P ＜0.01).Compared to the model group,the expression level of TRAF6 mRNA on tumors was decreased significantly,while the expression level of caspase-8 mRNA was increased significantly in the other groups(P ＜ 0.05).Conclusions The present results indicated that molecular mechanism of inhibition of liver cancer growth treated by elemene might be through down-regulating mRNA expressions of TRAF6 and caspase-8,promoting tumor cells apoptosis,and achieving the anti-tumor effect.

Avaliação comparativa ?in vivo? da eficácia do óleo de melaleuca, clorexidina e listerine sobre streptococcus mutans e microrganismos totais na saliva / ?In Vivo? Comparative Evaluation of the Efficacy of Melaleuca Oil, Chlorhexidine and Listerine against Streptococcus mutans and Total Microorganisms in Saliva

Objetivo: Comparar a eficácia dos enxaguatórios bucais: clorexidina 0,12%, Listerine e óleo de Melaleuca Alternifolia 0,5% e 2% sobre os níveis salivares de Streptococcus mutans e microrganismos totais. Métodos: O estudo foi um ensaio clínico, controlado, duplo cego e emparelhado. Para tanto foram selecionados 26 voluntários com idade entre 21 - 35 anos. Foi coletada de cada participante, no baseline, a quantidade de 1 mL de saliva não estimulada, 1 e 15 min após os bochechos com as seguintes soluções: água destilada estéril, digluconato de clorexidina 0,12%, Listerine (©Johnson & Johnson do Brasil), Melaleuca Alternifolia (Sigma-Aldrich St Louis, MO, USA) nas concentrações de 0,5% e 2%. Os participantes fizeram uso de todos os enxaguatórios bucais pesquisados, com intervalo de 15 dias entre cada solução. Imediatamente após o bochecho, foi coletada a saliva e realizadas as diluições seriadas, seguidas de plaqueamento em meio de cultura Agar sangue para o crescimento de microrganismos totais e SB-20 (Agar Sacarose Bacitracina) para S. mutans, mantidos por 48h a 37°C em microaerofilia. Após o período de incubação, as colônias foram contadas e transformadas em unidades formadoras de colônias (UFC/mL). Resultados: A clorexidina mostrou ação antimicrobiana na redução dos microrganismos totais e S. mutans, enquanto a ação do óleo Melaleuca Alternifolia 0.5% foi semelhante à água destilada. O listerine e o óleoMelaleuca Alternifolia 2% apresentaram redução microbiana, respectivamente, de 11% e 9% para microrganismos totais, entretanto para S. mutans o listerine reduziu os níveis em 20% e o óleo Melaleuca Alternifolia 2% em 11%. Conclusão: O bochecho único com clorexidina 0,12% é eficaz na redução de níveis de microrganismos totais e S. mutans presentes na saliva. Ao comparar a clorexidina com o listerine e óleo Melaleuca Alternifolia 0,5% e 2% nas mesmas condições a eficácia da ação destas soluções é diminuída.

Objective: To compare the efficacy of the mouthwashes 0.12% chlorhexidine, Listerine, and 0.5% and 2% Melaleuca Alternifolia oil against the salivary levels of Streptococcus mutans and total microorganisms.Methods: This study was double-blind controlled and paired clinical assay. Twenty-six volunteers aged 21 to 35 years old were enrolled. At baseline, 1 mL of unstimulated saliva was collected from each subject, 1 and 15 min after mouthrinsing with the following solutions: sterile distilled water, 0.12% chlorhexidine digluconate, Listerine (©Johnson & Johnson do Brasil), 0.5% and 2% concentrations of Melaleuca Alternifolia (Sigma-Aldrich). The volunteers used all the evaluated mouthrinses with a 15-day interval between the solutions. Immediately after rinsing, saliva was collected and serial dilutions were performed, followed by plating in blood agar culture medium for growth of total microorganisms and SB-20 (Sucrose-Bacitracin agar) for growth of S. mutans, and incubation at 37 °C for 48 h in microaerophilia. After incubation, the number of colonies was counted and expressed as colony forming units (UFC/mL).Results: Chlorhexidine showed antimicrobial action by reducing total microorganisms and S. mutans, while the action of 0.5% Melaleuca Alternifolia was similar to that of distilled water. Listerine and 2%Melaleuca Alternifolia oil reduced total microbial counts by 11% and 9% respectively, and S. mutans by 20% and 11%.Conclusion: A single rinse with 0.12% chlorhexidine is effective in reducing the levels of total microorganisms and S. mutans present in saliva. Under the same testing conditions, Listerine and 0.5% and 2%Melaleuca Alternifolia oil presented lower efficacy than chlorhexidine.

Viabilidade do uso do óleo essencial da Alpinia zerumbet, Zingiberaceae, na otimização do tratamento fisioterapêutico em paralisia cerebral espástica / Feasibility of using essential oil of Alpinia zerumbet, Zingiberaceae, the optimization of physical therapy in spastic cerebral palsy

Objetivo: O objetivo deste estudo foi avaliar a viabilidade do óleo essencial da Alpinia zerumbet associado ao tratamento fisioterapêutico da paralisia cerebral. Métodos: O estudo foi prospectivo, analítico e clínico do tipo II, aleatório por grupos em períodos específicos. A amostra, N = 24, de crianças com paralisia cerebral foi dividida em quatro grupos: dois grupos de cinesioterapia tratado com óleo essencial e seu controle, por via dérmica, na dose de 0,5 kg ml/10 kg, e dois grupos de cinesioterapia, tratado com óleo essencial e seu controle, por via inalatória, na dose 0,05 ml/10 kg/5 ml de soro fisiológico por 15 minutos. A espasticidade muscular e as atividades funcionais estáticas e dinâmicas foram mensuradas pelo protocolo de Durigon (2004). Os testes t-Student e ANOVA foram utilizados para a significância de 95%. Resultados: Os grupos tratados com óleo essencial apresentaram resultados significativos na avaliação do tônus muscular e na função estática e dinâmica. Conclusão: O óleo essencial associado à cinesioterapia modula o tônus muscular, possibilitando ganho funcional. As crianças tratadas de forma dermal apresentaram melhor resultado em relação às que inalaram o óleo essencial.

Objective: The objective of this study was to evaluate the feasibility of the essential oil of Alpinia zerumbet associated with physical therapy for cerebral palsy. Methods: The study was a prospective, clinical analytical type II, random by groups in specific periods. The sample, N = 24, were children with cerebral palsy was divided into four groups: groups of exercise treated with essential oil and its control and dermal administration of 0.5 kg ml/10 kg and two groups of kinesiotherapy treated with essential oil and its control by inhalation at a dose of 0.05 ml/10 kg/5 ml saline for 15 minutes. Muscle spasticity and the static and dynamic functional activities were measured by protocol Durigon (2004). The Student t-tests and ANOVA were used for the 95% significance. Results: The groups treated with essential oil showed significant results in the assessment of muscle tone and function static and dynamic. Conclusion: The essential oil associated with the kinesiotherapy modulates the tone making it functional gain. Children treated in such a way that showed best results for dermal which inhaled the essential oil.

Efecto del aceite esencial de Aloysia triphylla britton (cedrón) sobre el Trypanosoma cruzi en ratones / The effect of the essential oil from Aloysia triphylla britton (lemon verbena) on Trypanosoma cruzi in mice

Objetivos. Determinar la actividad anti-Trypanosoma cruzi in vivo del aceite esencial de Aloysia triphylla en ratones. Materiales y Métodos. Los animales fueron asignados aleatoriamente a los siguientes grupos (n = 15 por grupo): infectados y no tratados (G1), infectados y tratados con benznidazol 100 mg/kg (G2), infectados y tratados con aceite esencial de Aloysia triphylla 100 mg/kg (G3), infectados y tratados con aceite esencial de Aloysia triphylla 250 mg/kg (G4); no infectados y no tratados (G5), y no infectados y tratados con 250 mg/kg de Aloysia triphyla (G6). La infección con T. cruzi se realizó con 104 tripomastigotes sanguíneos y el tratamiento empezó en el octavo día postinfección (dpi) hasta el 28 dpi. La parasitemia se determinó con microscopía óptica cada dos días en 5 μL de sangre extraída de la cola. En el 14, 21 y 28 dpi se obtuvo sangre de la cola para el ensayo de creatina kinasa-MB (CK-MB), alanina aminotransferasa y creatinina; después, los animales fueron sacrificados y se extrajo el corazón para el estudio histopatológico. Resultados. El aceite esencial de cedrón produjo una reducción significativa de 85,4% del pico de parasitemia con la dosis de 250 mg/kg; también produjo reducción del número de amastigotes e infiltrados inflamatorios en el corazón. El nivel plasmático de CK-MB también disminuyó en el 28 dpi por efecto de dicho tratamiento. Conclusiones. En condiciones experimentales, el aceite esencial de Aloysia triphylla tiene efecto anti-Trypanosoma cruzi in vivo en ratones.

Objectives. To determine the in-vivo anti-Trypanosoma cruzi activity of the essential oil from Aloysia triphylla in mice. Materials and methods. The mice (n = 15) in the study were randomly assigned to the following groups: infected and untreated (G1), infected and treated with benznidazole 100 mg/kg (G2), infected and treated with of Aloysia triphylla essential oil 100 mg/kg (G3), infected and treated with of Aloysia triphylla essential oil 250 mg/kg (G4), uninfected and untreated (G5), and uninfected and treated with 250 mg/kg of Aloysia triphyla (G6). The infection was conducted using 104 blood T. cruzi trypomastigotes and the treatment began on the 8th day post-infection (dpi) through 28 dpi. The parasitemia was determined through optical microscopy every 2 days using 5 μL of blood sampled from the tail. In dpi 14, 21 and 28, the blood sample was obtained from the queue for testing creatine kinase-MB, alanine aminotransferase and creatinine, then animals were euthanized and the heart was removed for histopathological study. Results. The essential oil of lemon verbena produced a significant reduction of the parasitemia, 85.4% with the peak at a the dose of 250 mg/ kg. It was also observed a reduction in the number of amastigotes and inflammatory infiltrates in the heart. The creatine kinase-MB plasma levels also decreased at dpi 28 as a result of such treatment. Conclusions. Under experimental conditions, the essential oil of Aloysia triphylla (lemon verbena) has in vivo anti-Trypanosoma cruzi effect in mice.

A Efetividade de Óleos Essenciais no Controle Químico do Biofilme e na Prevenção da Cárie Dentária / Effectivity of Essential Oils on Chemical Control of Dental Biofilm and Caries Prevention

Introdução: Apesar da diminuição da incidência de cárie dentária na população mundial, devida aos inúmeros recursos disponíveis para seu controle, a inadequada higienização bucal levando ao acúmulo de biofilme dentário ainda constitui fator de risco para essa doença. O controle do biofilme dentário representa procedimento fundamental na prevenção de cárie e doença periodontal. Correntemente, o uso de escovas e dentifrícios é quase universal e quando boa higiene oral é praticada, mesmo se sabendo que a persistência efetiva na escovação é incomum, pode-se conseguir a remoção adequada do biofilme com diferentes procedimentos mecânicos e químicos. Evidências clínicas e científicas apoiando o uso de óleos essenciais nos cuidados à saúde oral são descritas na literatura. A incorporação de óleos nos dentifrícios e enxaguatórios têm como objetivo favorecer a inibição do desenvolvimento do biofilme, pela redução da aderência bacteriana à película adquirida. Objetivo: atualizar o conhecimento sobre os efeitos de óleos essenciais como agentes no controle químico do biofilme dentário. Conclusão: o uso dos óleos essenciais proporciona benefícios no controle do biofilme e, consequentemente, na prevenção da cárie dentária e da doença periodontal

Introduction: Despite the decrease in the incidence of dental caries in the world population, due to the resources available for its control, an inadequate oral hygiene leading to accumulation of the dental biofilm is still a risk factor for this disease. The control of dental biofilm represents a basic procedure in the prevention of dental caries and periodontal disease. Currently, the use of brushes and toothpastes is almost universal and when good oral hygiene is practiced, even knowing that effective persistence in the brushing is uncommon, it is possible to obtain appropriate removal of the biofilm through different mechanical and chemical procedures. Clinical and scientific evidence supporting the use of essential oils in the oral health care has been described in the literature. The incorporation of oils in the toothpastes and mouthrinses aims to inhibit the biofilm development, through the reduction of the bacterial adherence to the acquired film. Objective: the aim of this study was to update the knowledge of theuse of essential oils as chemical agents in the control of dental biofilm. Conclusion: the use of essential oils improve the control of dental biofilms and therefore of dental caries and periodontal disease prevention

Efeito Antibacteriano de Óleos Essenciais sobre Bactérias Formadoras do Biofilme Dentário / Antibacterial Effect of Essential Oils on Biofilm-forming Bacterial

Avaliar a atividade antibacteriana in vitro dos óleosessenciais de Eucalyptus globulus - Eucalipto (OE1), Eugeniauniflora L. - Pitangueira (OE2) e Mentha piperita - Hortelã-Pimenta (OE3) sobre bactérias cariogênicas. Material eMétodos: Determinou-se a Concentração Inibitória Mínima(CIM) dos óleos essenciais pela técnica da microdiluiçãosobre Streptococcus mutans (ATCC-25175), S. salivarius(ATCC-7073) e S. mitis (ATCC 903). Utilizou-se placa com 96orifícios, onde foram inseridos em cada um 10 ìL do inóculo(108 UFC/mL), 100 ìL de caldo Brain Heart Infusion (HIMEDIA,São Paulo, Brasil) duplamente concentrado e 100 ìL dos óleosessenciais em concentrações que variaram de 5 a 0,039mg.mL-1. Como controle positivo foi utilizada Clorexidina a 60ìg.mL-1. Ainda foram realizados os controles de crescimentobacteriano e de esterilidade do meio de cultura utilizado. Aleitura foi feita após 24 horas pelo método visual, sendoobservada a formação ou não de aglomerados de células(“botão”) no fundo da cavidade da placa. Resultados: O OE1inibiu crescimento bacteriano visível na concentração de 5mg.mL-1 sobre as três bactérias; OE2 mostrou CIM de 0,625mg.mL-1 e 3,75 mg.mL-1 sobre S. mitis e S. salivarius,respectivamente. OE3 exibiu CIM de 0,625 mg.mL-1, 0,312 mgmL-1 e 1,25 mg mL-1 sobre Streptococcus.mutans, S. mitis eS. salivarius, respectivamente. Conclusão: Os óleosessenciais avaliados apresentaram atividade antibacterianasobre as espécies cariogênicas ensaiadas...

To evaluate the in vitro antibacterial activity ofessential oils of Eucalyptus globulus - Eucalyptus (EO1),Eugenia uniflora L. - Surinam cherry (EO2) and Menthapiperita - Peppermint (EO3) on cariogenic bacteria. Materialand Methods: Minimum Inhibitory Concentration (MIC) of theEOs was determined through the microdilution technique onStreptococcus mutans (ATCC-25175), S. salivarius (ATCC-7073) and S. mitis (ATCC903). It was used a plate containing96 wells. Into each well were inserted 10ìL of inoculum(108CFU/mL), 100ìL of Brain Heart Infusion Broth (HIMEDIA,Sao Paulo, Brazil) doubly concentrated and 100ìL of theessential oils in concentrations ranging from 5 to 0.039mg.mL-1. Chlorhexidine (60ìg.mL-1) was used as a positive control.Besides that, were also conducted controls regardingbacterial growth and sterility of the culture medium. The resultswere read after 24 hours by visual method, and it wasobserved the formation or non-formation of cellular clusters(“button”) at the bottom of the plate’s wells. Results: EO1inhibited visible bacterial growth at a concentration of 5mg.mL-1 on the three bacteria under study. MIC of 0.625mg.mL-1 and3.75mg.mL-1 were showed by EO2 against S. mitis and S.salivarius, respectively. EO3 exhibited MIC of 0.625mg.mL-1,0.312mg.mL-1 and 1.25mg.mL-1 respectively on S. mutans, S.mitis and S. salivarius. Conclusion: The essential oilsevaluated showed antibacterial activity against the cariogenicstrains tested...

Self-performed supragingival biofilm control: qualitative analysis, scientific basis and oral-health implications

Patients frequently fail to achieve an optimal mechanical plaque control. However, many patients are not confident about using mouthrinses, and many professionals refuse to prescribe them for regular daily use. Aiming at achieving a better understanding of the use and prescription of mouthrinses in periodontics, 24 dentists with different dental educational levels were purposively chosen and interviewed in a qualitative research. Partial data was presented at the 15th Congress of the Brazilian Association for Oral Health Promotion (ABOPREV), and full data was presented at the 88th General Session and Exhibition of the International Association for Dental Research (IADR). The professionals' answers were confirmed or rejected through scientific data analysis. Additionally, scientifically supported answers were provided for the interviewees' most frequent unanswered questions. Around half of the participants (46 percent) reported that they recommended the use of mouthrinses, although a high percentage (64 percent) of the dentists answered that they knew very little about the efficacy of mouthrinses and also about the oral benefits (54 percent) provided by them. All interviewees reported that they were aware of the fact that their patients, and themselves, failed to floss and, less frequently, to brush their teeth, and all of them believed that oral health impacts overall systemic health. Seventy five percent answered that using mouthrinses was safe. Most participants (55 percent) did not declare themselves as mouthrinse users. We concluded that dentists with different levels of dental education have only partial knowledge related to mouthrinse use in periodontics. The use of effective mouthrinses on a daily basis is justified and can help patients achieve or maintain a healthier mouth. A healthier mouth will positively impact patients' quality of life and could also benefit their overall systemic health.

Lotus (Nelumbo nuficera) flower essential oil increased melanogenesis in normal human melanocytes

In this study, the essential oil from lotus flower extract, including petals and stamens, was assessed with regard to its effects on melanogenesis in human melanocytes. The lotus flower essential oil was shown to stimulate melanin synthesis and tyrosinase activity in a dose-dependent manner. The lotus flower essential oil induced the expression of tyrosinase, microphthalmia-associated transcription factor M (MITF-M), and tyrosinase-related proten-2 (TRP-2) proteins, but not tyrosinase mRNA. Moreover, it increased the phosphorylation of ERK and cAMP response element binding protein (CREB). In order to verify the effective components of the lotus flower oil, its lipid composition was assessed. It was found to be comprised of palmitic acid methyl ester (22.66%), linoleic acid methyl ester (11.16%), palmitoleic acid methyl ester (7.55%) and linolenic acid methyl ester (5.16%). Among these components, palmitic acid methyl ester clearly induced melanogenesis as the result of increased tyrosinase expression, thereby indicating that it may play a role in the regulation of melanin content. Thus, our results indicate that lotus flower oil may prove useful in the development of gray hair prevention agents or tanning reagents.