Influence of melaleuca and copaiba oils on Candida albicans adhesion.

OBJECTIVE: To evaluate the efficacy of Melaleuca alternifolia and Copaifera officinalis in inhibiting the adhesion of Candida albicans biofilm. BACKGROUND: Over 65% of denture wearers suffer from denture stomatitis, which is one of the most prevalent forms of oral candidiasis. This disease is characterised by the inflammation of the oral mucosa in contact with the contaminated denture. The contaminated denture contributes to the switch of C. albicans from yeast to its pathogenic hyphal form. Candida albicans adheres and colonises the polymethylmethacrylate resin surfaces and thus contributes to the development of denture stomatitis. MATERIALS AND METHODS: The minimal inhibitory concentration (MIC) of M. alternifolia and Co. officinalis was assessed by the agar dilution method. Sixty-six thermopolymerised acrylic resin squares were used and treated with phosphate-buffered saline, sodium hypochlorite 1%, melaleuca 0.75%, melaleuca 0.375%, melaleuca 0.188% and copaiba 10%. For adherence and biofilm formation, the treated squares were placed in six-well tissue culture plates containing 1 × 10(7)  cells/ml of ATCC1023 or SC5314 in Roswell Park Memorial Institute (RPMI) medium, and after 12 h, the planktonic cells were counted. RESULTS: Copaiba oil did not inhibit C. albicans growth. However, melaleuca oil showed an MIC value of 0.375% (3.4 mg/ml) for ATCC10231 and 0.093% (0.84 mg/ml) for SC5314. CONCLUSIONS: Our results demonstrated that M. alternifolia oil inhibited the growth of C. albicans. Moreover, both oils promoted significant adhesion reduction in the tested strains. These findings suggest the possibility of using these oils in prophylaxes against candidiasis.

A call for further research on the relation between type 2 diabetes and oral candidiasis.

OBJECTIVE: This study aimed to evaluate the relationship between oral candidiasis with salivary features, neutrophil function, and glycemic control in type 2 diabetes (T2D). DESIGN: Twenty-nine individuals were included, 16 with T2D and 13 without the disease. The participants underwent clinical examination, neutrophilic function tests, fasting glycemia and glycated hemoglobin (A1c), stimulated and unstimulated saliva collection, and swab and exfoliative cytology. Salivary flow, pH, and total fungi count were evaluated on saliva, and identification of the Candida species was performed in saliva and swab samples. RESULTS: There was no difference in unstimulated salivary flow and pH of the stimulated and unstimulated saliva for participants with T2D and controls (P > .05). Individuals from both groups presented no candidal lesions. The salivary fungal growth in the T2D group was higher than that in controls (P < .05). Only individuals with T2D presented alterations in the neutrophilic functions (14/16; 87.5%; P < .05). There was no relationship between high A1c values and neutrophil dysfunction with the presence of Candida spp. in both saliva and mucosa (P > .05). CONCLUSIONS: High A1c level, reduction in neutrophil activity, salivary flow and pH, and increase in total salivary Candida spp. counts were not related to oral candidiasis in patients with T2D.

Zika virus infection spread through saliva--a truth or myth?

In this Point-of-view article we highlighted some features related to saliva and virus infection, in special for zika virus. In addition, we pointed out the potential oral problems caused by a microcephaly originated by a zika virus infection. In the end the, we demonstrated the importance of a more comprehensive exploration of saliva and their components as a fluid for diagnostic and therapeutic approaches on oral and systemic diseases.

Identification of acid-resistant proteins in acquired enamel pellicle.

OBJECTIVES: This study characterized the proteome profile of the acquired pellicle formed in vivo on enamel. Changes in this proteome profile after exposure to lactic or citric acid were also evaluated. METHODS: Volunteers (n=8) were subjected to dental prophylaxis. After 2 h to allow the formation of the acquired pellicle, the teeth were isolated with cotton rolls and 1 mL of citric acid (1%, pH 2.5) or lactic acid (0.1 M pH 4.8) or deionized water was gently applied with a pipette on the anterior teeth (both maxillary and mandibular) for 10 s. In sequence, the pellicle was collected with an electrode filter paper soaked in 3% citric acid. This procedure was repeated for two additional days following a crossover protocol. Proteins were subjected to reverse phase liquid chromatography coupled to mass spectrometry (nLC-ESI-MS/MS). MS/MS data were processed and submitted to Proteome Discoverer software. Searches were done using SWISS-PROT and TrEMBL databases for human proteins. RESULTS: In total, seventy-two proteins were present in all groups and were submitted to quantitative analysis (SIEVE). Some of these proteins were increased more than two-fold after exposure to the acids. Among them, cystatin-B was increased 20- and 13-fold after exposure to citric and lactic acids, respectively. Additionally, some proteins were identified in only one of the groups (18, 5, and 11 proteins for deionized water, citric and lactic acids, respectively). CONCLUSIONS: Our results open new insights regarding potentially acid-resistant proteins that could be added to dental products to prevent acidic dissolution of the teeth.

Bacteriostatic effect of copaiba oil (Copaifera officinalis) against Streptococcus mutans.

This study evaluated the inhibitory activity of copaiba oil (Copaifera officinalis against the cariogenic microorganism, Streptococcus mutans. For such purpose, a minimum inhibition concentration test of copaiba oil against S. mutans was performed, using the serial dilution in broth technique, with a negative control, a positive control (0.12% chlorhexidine) and a 10% copaíba oil solution as a test. A minimum bactericidal concentration test with tubes presenting microbial inhibition was also conduced. In the minimum inhibitory concentration test, copaiba oil showed inhibition of bacterial growth at all concentrations tested up to 0.78 µL/mL of the 10% copaiba oil solution in the broth. In addition, the negative control had no inhibition, and the 0.12% chlorhexidine solution was effective up to 6.25 µL/mL in the broth. Copaiba oil showed a bacteriostatic activity against S. mutans at low concentrations, and could be a an option of phytotherapic agent to be used against cariogenic bacteria in the prevention of caries disease.

Bacteriostatic effect of copaiba oil (Copaifera officinalis) against Streptococcus mutans

This study evaluated the inhibitory activity of copaiba oil (Copaifera officinalis against the cariogenic microorganism, Streptococcus mutans. For such purpose, a minimum inhibition concentration test of copaiba oil against S. mutans was performed, using the serial dilution in broth technique, with a negative control, a positive control (0.12 percent chlorhexidine) and a 10 percent copaíba oil solution as a test. A minimum bactericidal concentration test with tubes presenting microbial inhibition was also conduced. In the minimum inhibitory concentration test, copaiba oil showed inhibition of bacterial growth at all concentrations tested up to 0.78 µL/mL of the 10 percent copaiba oil solution in the broth. In addition, the negative control had no inhibition, and the 0.12 percent chlorhexidine solution was effective up to 6.25 µL/mL in the broth. Copaiba oil showed a bacteriostatic activity against S. mutans at low concentrations, and could be a an option of phytotherapic agent to be used against cariogenic bacteria in the prevention of caries disease.

Este estudo avaliou a atividade inibitória do óleo de copaíba (Copaifera officinalis contra o microrganismo cariogênico, Streptococcus mutans. Para isso, foi realizado um teste de concentração mínima inibitória do óleo de copaíba contra S. mutans, utilizando a técnica de diluição seriada em caldo, com um controle negativo, um controle positivo (clorexidina a 0,12 por cento) e uma solução de óleo de copaíba 10 por cento como teste. Também foi conduzido um teste de concentração mínima bactericida com os tubos que apresentaram inibição microbiana. No teste de concentração inibitória mínima, o óleo de copaíba mostrou inibição do crescimento bacteriano em todas as concentrações testadas até 0,78 µL/mL da solução a 10 por cento do óleo de copaíba no caldo. Além disso, o controle negativo não teve nenhuma inibição, e a solução de clorexidina 0,12 por cento foi eficaz até 6,25 µL/mL no caldo. O óleo de copaíba mostrou uma atividade bacteriostática contra S. mutans em baixas concentrações, apresentando-se assim como uma opção de fitoterápico a ser utilizado contra bactérias cariogênicas na prevenção de cáries.

Parâmetros salivares, proteoma e saúde bucal na síndrome de Moebius / Salivary parameters, proteome and oral health in Moebios syndrome

A síndrome de Moebius (SM) é uma diplegia congênita rara caracterizada por paralisia total ou parcial do VI e VII nervos cranianos, que leva à ausência ou deficiência dos movimentos dos músculos envolvidos na mímica facial e ao estrabismo convergente. As características bucais descritas nesses indivíduos incluem o palato ogival, micrognatia, malformação de língua, filtro curto, falta de coaptação de lábios, e maior incidência de lesões de cárie. O objetivo deste estudo foi avaliar as características salivares quantitativas e qualitativas, incluindo o proteoma salivar, de indivíduos com SM, associá-las com a saúde bucal, e compará-las com as características salivares de um grupo controle, não afetado pela SM. Foram incluídos 15 indivíduos com SM e 15 controles. O comprometimento facial do individuos com a SM foi avaliada e graduada em scores 0,1 ou 2, uni ou bilateral, para os nervos II, III, IV, V, VI, VII e XI. Os pesquisadores determinaram o índice de cárie (ICDAS), de doença periodontal (PSR) e de placa (Silness Lõe) nos dois grupos de estudo. Também realizaram coletas de saliva total não estimulada, estimulada e parotídea bilateral, sendo o fluxo salivar estabelecido em ml/min. A capacidade tampão foi avaliada na saliva total estimulada através da titulação de HCl 0,01N. A atividade de ?-amilase nas amostrasmfoi medida através da produção de maltose. Para a análise proteômica optou-se pela divisão das amostras de saliva de acordo com o fluxo em ml/min. Desta forma, para cada grupo, estudo e controle, os 4 tipos de saliva (estimulada, não estimulada, parotídea esquerda, parotídea direita) foram subdivididos de acordo com baixo fluxo (abaixo da média do grupo) ou alto fluxo (acima da média do grupo), resultando em 16 subgrupos. O proteoma foi obtido por duas metodologias distintas, a primeira a partir da cromatografia líquida espectrometria de massas e a segunda que utilizou a técnica de eletroforese em gel de poliacrilamida contendo dodecil sulfato de sódio (SDS-PAGE) associada à eletroforese em gel de poliacrilamida (native cationic). A ocorrência das lesões de cárie foi significativamente mais alta entre os participantes com SM (p>0,05) no corte 2, bem como a ocorrência de doença periodontal (p>0,05), quando comparado ao grupo controle. Não houve diferença no índice de placa entre os grupos. A análise proteômica mostrou diminuição de cistatinas B, S e SN nos indivíduos com SM. Não houve diferença no perfil proteico entre os grupos de baixo e de alto fluxo salivar, para indivíduos com SM e controle. Houve aumento na quantidade de amilase salivar em e de histatina 1,3 e 5 em indivíduos com SM. Concluímos que indivíduos com SM apresentam diminuição de fluxo salivar, de capacidade tampão e alterações proteicas que colocam esses indivíduos em situação de maior risco para cárie e para doença periodontal.

The Moebius syndrome (MS) is a rare congenital diplegia characterized by total or partial palsy of the VI and VII cranial nerves, leading to the absence or disability of the movements of facial expression muscles and to convergent strabismus. The oral features described in these individuals include high-arched palate, micrognathia, tongue malformation, short filter, lack of lips coaptation, and higher incidence of caries lesions. The aim of this study was to evaluate the quantitative and qualitative salivary characteristics, including the salivary proteome of individuals with MS, associate them with the oral health, and compare them to the salivary characteristics of a control group, unaffected by SM. We included 15 subjects with MS and 15 controls. The facial involvement of individuals with MS was evaluated and graded on scores 0, 1 or 2, uni or bilateral to the nerves II, III, IV, V, VI, VII and XI. The researchers established the caries (ICDAS), periodontal disease (PSR) and plate (Silness Lõe) indexes in both groups. We also performed unstimulated, stimulated and bilateral parotid saliva collections, and salivary flow was calculated (ml / min). The buffer capacity was measured in stimulated saliva by titration of 0.01N HCl. The ?-amylase activity was determined by maltose production. For proteomic analysis it was decided to split the saliva samples in accordance with the flow in ml/min. Thus, for each group, study and control, the 4 types of saliva (stimulated, unstimulated, left parotid, right parotid) were subdivided according to low flow (below the group average) or high flow (above average group), resulting in 16 subgroups. The proteome was obtained by two different methodologies, the first was liquid chromatography mass spectrometry and the second was sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) associated with cationic PAGE. The occurrence of caries lesions, related to cut-off 2, as well as the occurrence of periodontal disease, was significantly higher (p> 0.05) in participants with MS when compared to the control group. There was no statistical difference in plaque index between groups. Proteomics analysis showed decrease of cystatin B, S and SN in individuals with MS. There was no difference in protein profile between the low and high salivary flow groups, for individuals with MS and control. There was an increase in the amylase amount and histatin 1, 3 and 5 in individuals with MS. We concluded that individuals with MS present decreased salivary flow, decreased buffer capacity and protein alterations that place these individuals at increased risk for caries and periodontal disease.

Parâmetros salivares, proteoma e saúde bucal na síndrome de Moebius / Salivary parameters, proteome and oral health in Moebios syndrome

A síndrome de Moebius (SM) é uma diplegia congênita rara caracterizada por paralisia total ou parcial do VI e VII nervos cranianos, que leva à ausência ou deficiência dos movimentos dos músculos envolvidos na mímica facial e ao estrabismo convergente. As características bucais descritas nesses indivíduos incluem o palato ogival, micrognatia, malformação de língua, filtro curto, falta de coaptação de lábios, e maior incidência de lesões de cárie. O objetivo deste estudo foi avaliar as características salivares quantitativas e qualitativas, incluindo o proteoma salivar, de indivíduos com SM, associá-las com a saúde bucal, e compará-las com as características salivares de um grupo controle, não afetado pela SM. Foram incluídos 15 indivíduos com SM e 15 controles. O comprometimento facial do individuos com a SM foi avaliada e graduada em scores 0,1 ou 2, uni ou bilateral, para os nervos II, III, IV, V, VI, VII e XI. Os pesquisadores determinaram o índice de cárie (ICDAS), de doença periodontal (PSR) e de placa (Silness Lõe) nos dois grupos de estudo. Também realizaram coletas de saliva total não estimulada, estimulada e parotídea bilateral, sendo o fluxo salivar estabelecido em ml/min. A capacidade tampão foi avaliada na saliva total estimulada através da titulação de HCl 0,01N. A atividade de ?-amilase nas amostrasmfoi medida através da produção de maltose. Para a análise proteômica optou-se pela divisão das amostras de saliva de acordo com o fluxo em ml/min. Desta forma, para cada grupo, estudo e controle, os 4 tipos de saliva (estimulada, não estimulada, parotídea esquerda, parotídea direita) foram subdivididos de acordo com baixo fluxo (abaixo da média do grupo) ou alto fluxo (acima da média do grupo), resultando em 16 subgrupos.

O proteoma foi obtido por duas metodologias distintas, a primeira a partir da cromatografia líquida espectrometria de massas e a segunda que utilizou a técnica de eletroforese em gel de poliacrilamida contendo dodecil sulfato de sódio (SDS-PAGE) associada à eletroforese em gel de poliacrilamida (native cationic). A ocorrência das lesões de cárie foi significativamente mais alta entre os participantes com SM (p>0,05) no corte 2, bem como a ocorrência de doença periodontal (p>0,05), quando comparado ao grupo controle. Não houve diferença no índice de placa entre os grupos. A análise proteômica mostrou diminuição de cistatinas B, S e SN nos indivíduos com SM. Não houve diferença no perfil proteico entre os grupos de baixo e de alto fluxo salivar, para indivíduos com SM e controle. Houve aumento na quantidade de amilase salivar em e de histatina 1,3 e 5 em indivíduos com SM. Concluímos que indivíduos com SM apresentam diminuição de fluxo salivar, de capacidade tampão e alterações proteicas que colocam esses indivíduos em situação de maior risco para cárie e para doença periodontal.

The Moebius syndrome (MS) is a rare congenital diplegia characterized by total or partial palsy of the VI and VII cranial nerves, leading to the absence or disability of the movements of facial expression muscles and to convergent strabismus. The oral features described in these individuals include high-arched palate, micrognathia, tongue malformation, short filter, lack of lips coaptation, and higher incidence of caries lesions. The aim of this study was to evaluate the quantitative and qualitative salivary characteristics, including the salivary proteome of individuals with MS, associate them with the oral health, and compare them to the salivary characteristics of a control group, unaffected by SM. We included 15 subjects with MS and 15 controls. The facial involvement of individuals with MS was evaluated and graded on scores 0, 1 or 2, uni or bilateral to the nerves II, III, IV, V, VI, VII and XI. The researchers established the caries (ICDAS), periodontal disease (PSR) and plate (Silness Lõe) indexes in both groups. We also performed unstimulated, stimulated and bilateral parotid saliva collections, and salivary flow was calculated (ml / min). The buffer capacity was measured in stimulated saliva by titration of 0.01N HCl. The ?-amylase activity was determined by maltose production. For proteomic analysis it was decided to split the saliva samples in accordance with the flow in ml/min. Thus, for each group, study and control, the 4 types of saliva (stimulated, unstimulated, left parotid, right parotid) were subdivided according to low flow (below the group average) or high flow (above average group), resulting in 16 subgroups.

The proteome was obtained by two different methodologies, the first was liquid chromatography mass spectrometry and the second was sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) associated with cationic PAGE. The occurrence of caries lesions, related to cut-off 2, as well as the occurrence of periodontal disease, was significantly higher (p> 0.05) in participants with MS when compared to the control group. There was no statistical difference in plaque index between groups. Proteomics analysis showed decrease of cystatin B, S and SN in individuals with MS. There was no difference in protein profile between the low and high salivary flow groups, for individuals with MS and control. There was an increase in the amylase amount and histatin 1, 3 and 5 in individuals with MS. We concluded that individuals with MS present decreased salivary flow, decreased buffer capacity and protein alterations that place these individuals at increased risk for caries and periodontal disease.

Análise da atividade antimicrobiana dos óleos de dopaíba (Copaifera officinalis) e da melaleuca (Melaleuca alternifolia) sobre Fusobacterium nucleatum e Porphyromonas gingivalis: determinação das concentrações inibitórias e bactericidas mínimas e efeito de concentrações subinibitórias sobre a agregação / Antimicrobial activity of copaiba (Copaifera officinalis) and melaleuca (Melaleuca alternifolia) oils on Porphyromonas gingivalis and Fusobacterium nucleatum: determination of minimum inhibitory and bactericidal concentrations and subinibitory effect on the aggregation

A cavidade bucal é um habitat microbiano complexo que apresenta mais de 500 espécies bacterianas como componentes da microbiota. A saúde periodontal está estabelecida quando há equilíbrio entre os microrganismos patogênicos e o hospedeiro. O digluconato de clorexidina é um dos antimicrobianos bucais mais utilizados, no entanto, essa substância tem sido associada a alguns efeitos colaterais indesejáveis. Os óleos de copaíba e de melaleuca tem sido estudados como importantes fitoterápicos, devido aos seus diversos efeitos, entre eles ação antibacteriana. Partindo-se do princípio de que o óleo copaíba e de melaleuca possuem atividade antimicrobiana e de que não há dados suficientes na literatura utilizando esses fitoterápicos sobre Porphyromonas gingivalis e Fusobacterium nucleatum, foram preparados testes de Concentração Inibitória Mínima (CIM) e Concentração Bactericida Mínima (CBM) das bactérias Fusobacterium nucleatum (ATCC 25586) e Porphyromonas gingivalis (ATCC 3327) frente ao digluconato de clorexidina e aos óleos provindos de Copaifera officinalis e de Melaleuca alternifólia. Realizaram-se ainda testes para determinação de Concentração Subinibitória (CS) e ensaios para determinar a capacidade de autoagregação e coagregação dessas bactérias expostas às concentrações subinibitórias das soluções testadas. Como controles foram utilizados apenas meio de cultura e meio de cultura acrescido de Tween 80. Todos os óleos utilizados tiveram sua composição analisada por cromatografia gasosa acoplada à espectrometria de massa. O óleo de melaleuca, após identificação de sua composição, apresentou, respectivamente, os seguintes constituintes em maiores concentrações: terpin-4-ol, -terpineno, -terpineno, terpinoleno e 1,8-cineol. O óleo de copaíba apresentou como principais constituintes, respectivamente, trans-cariofileno, germacreno B, -humuleno, germacreno D e -copaeno. Os resultados obtidos como CIM para F.nucleatum foram semelhantes à CBM em todas as...

The oral cavity is a complex microbial habitat that has more than 500 bacterial species as components of the microbiota. Periodontal health is established when there is equilibrium between pathogens and host. The chlorhexidine digluconate is one of the most commonly used oral antibiotics, however, this substance has been associated with some undesirable side effects. Copaiba and melaleuca oils have been studied as important herbal medicines because of their effects, including antibacterial action. Based on the principle that the copaiba oil and tea tree have an antimicrobial activity and that is no sufficient data in the literature using these herbal medicines against Porphyromonas gingivalis and Fusobacterium nucleatum, Minimum Inhibitory Concentration (MIC) and minimum bactericidal concentration (MBC) tests of Fusobacterium nucleatum (ATCC 25586) and Porphyromonas gingivalis (ATCC 3327) related to chlorhexidine digluconate and oils coming from Copaifera officinalis and Melaleuca alternifolia, were prepared. Assays were performed to determine the subinibitory concentration and the capacity of those bacteria to autoaggregation and coaggregation when exposed to subinibitory concentrations, previously tested. Medium and medium added Tween 80 were used as a control. All oils used had their composition analyzed by gas chromatography-mass spectrometry. The tea tree oil mainly chemical compounds were identified as terpin-4-ol, -terpinen, -terpinen, terpinolene and 1,8-cineole while copaiba oil presented as its main constituents trans-caryophyllene, germacrene B, -humulene, germacrene D and -copaene. The MIC results for F.nucleatum were similar to the CBM data in all solutions. For the bacterium P. gingivalis, all solutions tested inhibited bacterial growth, however, the results obtained during the determination of CBM showed that the copaiba oil was bacteriostatic. All solutions tested inhibited the autoaggregation process but only...