RESUMO
AIM: To analyse the antimicrobial and biological properties of a new bioceramic intracanal medicament (Bio-C Temp), and to compare it with two calcium hydroxide-based intracanal medicaments (Calen® and UltraCal® XS). METHODOLOGY: The direct contact and the crystal violet tests were performed to assess the antimicrobial activity of intracanal medicaments against Enterococcus faecalis. The cytocompatibility and the effect of the medication on the biology of the human osteoblast-like cell line (Saos-2) were evaluated with methylthiazole tetrazolium (MTT), neutral red, alkaline phosphatase activity and mineralization (alizarin red) assays. The data were analysed using one-way anova and Tukey's tests, two-way anova and Bonferroni's tests, or Kruskal-Wallis and Dunn's tests (α = 0.05). RESULTS: Bio-C Temp had significantly less antibacterial activity and biofilm biomass reduction than the other intracanal medicaments (P < 0.05). There was no difference in the viability of Saos-2 exposed to the various intracanal medicaments, except regarding the 1 : 2 dilution, when the Bio-C Temp group had significantly lower cell viability than the UltraCal® XS and Calen® groups (P < 0.05). Bio-C Temp induced significantly greater ALP activity than the other intracanal medicaments (P < 0.05) at day 1. Calen® induced significantly greater deposition of mineralized nodules than the other intracanal medicaments (P < 0.05), and no difference was observed between Bio-C Temp and UltraCal® XS (P > 0.05). CONCLUSIONS: Bio-C Temp had similar cytocompatibility at higher dilutions, and higher or similar induction of ALP activity and deposition of mineralized nodules in comparison with Calen® and UltraCal® XS. However, it had significantly less antibacterial and antibiofilm activity than Calen® and UltraCal® XS.
Assuntos
Anti-Infecciosos , Hidróxido de Cálcio , Antibacterianos/farmacologia , Biologia , Hidróxido de Cálcio/farmacologia , Humanos , OsteoblastosRESUMO
AIM: To assess the effects of octenidine dihydrochloride (OCT) on eukaryotic cells and the cytotoxicity of OCT associated with sodium hypochlorite - NaOCl (NaOCl/OCT). METHODOLOGY: L929 fibroblasts and human osteoblast-like cells (Saos-2) were exposed to 0.1% OCT, 2% CHX, 2.5% NaOCl, 5.25% NaOCl and mixtures of 5.25% NaOCl and 0.1% OCT (NaOCl/OCT) at 90 : 10, 80 : 20 and 50 : 50 ratios. Cell viability was assessed by methyl-thiazol-tetrazolium (MTT) and neutral red (NR) assays; type of cell death, by flow cytometry; cytoskeleton, by actin and α-tubulin fluorescence; and alkaline phosphatase (ALP) activity, by thymolphthalein release. The data were analysed by two-way ANOVA and Bonferroni tests (α = 0.05). RESULTS: MTT and NR assays revealed that 0.1% OCT had the lowest cytotoxicity (P < 0.05), followed by 2% CHX (P < 0.05). The 2.5% NaOCl, NaOCl/OCT 80 : 20 and NaOCl/OCT 50 : 50 solutions had intermediate cytotoxicity. NaOCl 5.25% and NaOCl/OCT 90 : 10 had the highest cytotoxicity (P < 0.05). The OCT group had a higher percentage of viable cells than the NaOCl and CHX groups (P < 0.05), and induced apoptosis at higher doses. The cytoskeleton alterations were observed at 0.12%, 0.6% and 2.02% for the NaOCl, CHX and OCT groups, respectively. The solutions did not induce ALP activity. CONCLUSION: Octenidine dihydrochloride was less cytotoxic, induced apoptosis at higher doses, caused few changes in the cytoskeleton and did not induce alkaline phosphatase activity. In addition, octenidine dihydrochloride reduced the cytotoxicity of 5.25% NaOCl when combined at 20 and 50%.
Assuntos
Irrigantes do Canal Radicular , Hipoclorito de Sódio , Clorexidina , Células Eucarióticas , Humanos , Iminas , PiridinasRESUMO
AIM: To assess the effect of immersion in distilled water or phosphate-buffered saline (PBS) on the solubility, volumetric change and presence of voids of calcium silicate-based root canal sealers (TotalFill BC, Sealer Plus BC and Bio-C), in comparison with the gold standard epoxy resin-based sealer (AH Plus). METHODOLOGY: All properties were evaluated after immersion in distilled water or PBS. Solubility was determined by the percentage of mass loss, whereas volumetric change and presence of voids were evaluated by micro-computed tomography, after 7 days of immersion. The volumetric change and percentage of voids between the baseline (after setting) and the experimental period were calculated. Statistical analysis was performed using one-way anova and Tukey's or Student's t-tests (α = 0.05). RESULTS: The calcium silicate-based sealers had significantly greater solubility and volumetric loss than AH Plus, after immersion in distilled water or PBS (P < 0.05). Bio-C had the greatest solubility (P < 0.05), followed by TotalFill BC and Sealer Plus BC, which were similar (P > 0.05). Regarding the volumetric change, AH Plus had a volume increase, with similar values in distilled water and PBS (P > 0.05). TotalFill BC, Sealer Plus BC and Bio-C had a similar volumetric change (P > 0.05). The calcium silicate-based materials had the greatest solubility and volume loss after immersion in distilled water (P < 0.05). There was no difference in the percentage of voids amongst the sealers, before and after immersion in distilled water or PBS (P > 0.05). CONCLUSIONS: TotalFill BC, Sealer Plus BC and Bio-C had significantly greater solubility and volumetric loss than AH Plus. Although storage in PBS significantly reduced the solubility and volumetric change of calcium silicate-based sealers, their solubility remained above that recommend by ISO 6876. All the sealers evaluated had low and similar voids, even after immersion in distilled water or PBS.
Assuntos
Materiais Restauradores do Canal Radicular , Cálcio , Compostos de Cálcio , Cavidade Pulpar , Combinação de Medicamentos , Resinas Epóxi , Humanos , Teste de Materiais , Fosfatos , Silicatos , Solubilidade , Microtomografia por Raio-XRESUMO
AIM: To evaluate the cytocompatibility, bioactive potential, antimicrobial and antibiofilm activities of an experimental calcium silicate-based endodontic sealer, in comparison with TotalFill BC Sealer and AH Plus. METHODOLOGY: Cytocompatibility was assessed by methyltetrazolium (MTT) and neutral red (NR) assays, after exposure of the Saos-2 cells to the sealer extracts (1 : 2, 1 : 4, 1 : 8, 1 : 16 and 1 : 32 dilutions) for 24 h. The sealers were manipulated and placed in 12-well culture plates and exposed to ultraviolet light; then, 5 mL of DMEM without serum was added. Cell bioactivity was evaluated by alkaline phosphatase activity (ALP) and Alizarin red staining (ARS). Antimicrobial and antibiofilm activities were evaluated by direct contact test (DCT) on planktonic cells (DCTPC) and modified DCT on biofilm formed in bovine dentine blocks (MDCT). MTT, NR and ALP data were analysed by two-way anova and Bonferroni tests; ARS data by anova and Tukey's tests; and the microbiological data by Kruskal-Wallis and Dunn tests (α = 0.05). RESULTS: The experimental sealer, TotalFill BC and AH Plus were not cytotoxic to Saos-2, in comparison with the negative control (P > 0.05). Greater ALP was observed after 7 days of exposure of Saos-2 to AH Plus and the experimental sealer (P < 0.05) when compared to the control. Significantly greater mineralized nodule production was observed for TotalFill BC and the experimental sealer (P < 0.05). In DCTPC, the experimental sealer and TotalFill BC were associated with a significantly greater reduction of E. faecalis (P < 0.05) and eliminated C. albicans. In MDCT, the experimental sealer and TotalFill BC had significantly greater antibiofilm efficacy (P < 0.05). CONCLUSIONS: The experimental calcium silicate-based sealer was cytocompatible, bioactive, antimicrobial against E. faecalis and C. albicans and effective against E. faecalis biofilms, with potential for use in root canal treatment.
Assuntos
Anti-Infecciosos , Materiais Restauradores do Canal Radicular , Animais , Cálcio , Compostos de Cálcio , Bovinos , Resinas Epóxi , Teste de Materiais , SilicatosRESUMO
The ovarian follicle components must provide an ideal environment to ensure the success of reproductive processes, and communication between follicular cells is crucial to support proper oocyte growth. Recently, it has been demonstrated that the presence of extracellular vesicles (EVs) carrying microRNAs (miRNAs) in follicular fluid represents an important autocrine and paracrine communication mechanism inside the ovarian follicle. In this study, we tested the hypothesis that the miRNA content of EVs isolated from ovarian follicular (granulosa and cumulus-oocyte complexes) cell-conditioned culture media is dependent upon cell type. We initially screened bovine granulosa cells (GCs) and cumulus-oocyte complexes (COCs), as well as their derived EVs for 348 miRNAs using real-time PCR, and detected 326 miRNAs in GCs and COCs cells and 62 miRNAs in GCs and COCs EVs. A bioinformatics analysis of the identified cell-specific and differentially expressed miRNAs predicted that they likely modulate important cellular processes, including signalling pathways such as the PI3K-Akt, MAPK and Wnt pathways. By investigating the origins of miRNAs within the follicular fluid, the results of this study provide novel insights into follicular miRNA content and intercellular communication that may be of invaluable use in the context of reproductive technologies, diagnostic of ovarian-related diseases and/or the identification of biomarkers for oocyte and embryo quality.
Assuntos
Vesículas Extracelulares/genética , MicroRNAs , Folículo Ovariano/fisiologia , Animais , Bovinos , Comunicação Celular , Meios de Cultivo Condicionados , Feminino , Líquido Folicular/citologia , Células da Granulosa , Folículo Ovariano/citologia , Reação em Cadeia da Polimerase em Tempo Real , Transdução de SinaisRESUMO
BACKGROUND: The number of deceased organ donors has decreased slightly over the past 4 years. Although the pool of intestinal transplantation candidates is relatively small, donor allocation is challenging because of the inability to maintain the donor in a good condition and the complexities involved in making a suitable weight match between donors and recipients. Our goal was to analyze the epidemiologic profile of potential donors based on the organs offered by the regional Organ Procurement Organization from Hospital das Clinicas-USP (OPO/HC-USP) and attempt to estimate possible matches and program viability. METHODS: We retrospectively analyzed information from the OPO/HC-USP database regarding organs offered over the past 7 years as well as patients listed in our program. Data were collected regarding donor characteristics (eg, sex, age, race, body mass index, blood type, cause of death) and medical care details (eg, intensive care unit stay, use of vasopressor agents and antibiotics). RESULTS: In this time period, there were 18,103 brain death notifications in the state of São Paulo; 5,202 (35%) became viable donors, resulting in 5,201 (99%) effectively used livers and kidneys. Most potential donors were male, in their 40s, white, and had blood type O. Only 3 potential donors from OPO/HC-USP would have reached the established minimum criteria for intestinal donation over these 7 years.
Assuntos
Morte Encefálica , Intestinos/transplante , Doadores de Tecidos/provisão & distribuição , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Brasil , Criança , Pré-Escolar , Feminino , Hospitais , Humanos , Lactente , Unidades de Terapia Intensiva , Masculino , Pessoa de Meia-Idade , Nutrição Parenteral/estatística & dados numéricos , Estudos Retrospectivos , Adulto JovemRESUMO
We evaluated the efficacy of PHENODRAL® product on debilitated cattle, body condition (BC=2) and the influence of this product in clinical and laboratory parameters and weight gain. The experiment was performed using 20 young cattle aged 8 to 12 months, divided into two groups of 10 animals each, five males and five females/group (untreated Control Group - GI and Drug-treated group - Group - GII). The animals of GII received three doses of 15 mL of d PHENODRAL® product administered every six days (D0, D + 6 and D + 12), via IV, and the GI group received 0.9% IV saline administration. The experimental animals were monitored until D+35 The results showed that the weight gain in the GII group was higher in comparison to the control group GI, mainly at the moments before and after the product application, and a significant difference were observed at D + 28 in comparison to GI group. The results for the weekly parameters evaluated: feed intake, weekly weight gain and weekly feed conversion, were statistically different in moments D0 to D + 7, D + 7 to D + 14, D + 14 to D + 21 and D +21 to D + 28 between GI and GII emphasizing that the treated animals ingested greater amount of feed resulting in a higher weight gain due to better feed conversion compared to the control group animals. There were no statistical differences between GI and GII for the clinical, hematological and biochemical parameters evaluated throughout the trial period, however, the serum cortisol levels assessed in the GI group were above the reference values for the bovine species. On the other hand, the cortisol values found in GII decreased after the PHENODRAL® product administration, as well as the glucose concentrations when compared to the GI, thus demonstrating the efficacy of PHENODRAL® product in improving the treated animals performance.
Avaliou-se a eficácia do produto PHENODRAL® em bovinos debilitados com escore corporal 2 e a influencia deste produto nos parâmetros clínicos, laboratoriais e ganho de peso. O experimento foi realizado no município de Abadia dos Dourados/MG, com 20 bovinos jovens com idade entre 8 a 12 meses, divididos em dois grupos de 10 animais cada, sendo cinco machos e cinco fêmeas/grupo (Grupo Controle GI e Grupo Tratado GII). Os animais do grupo GII receberam três doses de 15 mL do produto PHENODRAL® administrado, a cada seis dias (D0, D+6 e D+12), via I.V., e o grupo GI recebeu administração de solução fisiológica 0,9%, via I.V. Os animais experimentais foram observados até o período D+35 Os resultados mostraram que o ganho de peso no grupo GII foi superior ao grupo controle GI, principalmente, nos momentos antes e após aplicação do produto, e uma diferença estatística mais evidente no momento D+28 em comparação ao GI. Os resultados encontrados para os parâmetros avaliados semanalmente: consumo de ração, ganho de peso semanal e conversão alimentar semanal, foram estatisticamente diferentes nos momentos D0 ao D+7, D+7 ao D+14, D+14 a D+21 e D+21 a D+28 entre os grupos GI e GII ressaltando-se que, os animais tratados ingeriram maior quantidade de ração resultando em um ganho de peso maior em função de melhor conversão alimentar em comparação aos animais do grupo controle. Não foram encontradas diferenças estatísticas entre os grupos GI E GII para os parâmetros clínicos, hematológicos e bioquímicos avaliados durante todo o período experimental, porém, os valores de cortisol sérico avaliados no grupo GI estavam acima dos valores de referencia para a espécie bovina. Por outro lado, os valores de cortisol no grupo GII diminuíram após a aplicação do produto PHENODRAL®assim como as concentrações de glicose em comparação ao GI, demonstrando assim a eficiência do produto PHENODRAL® na melhoria do desempenho dos animais tratados.
Assuntos
Animais , Bovinos , Aumento de Peso , Drogas Veterinárias/análise , Estimulantes do Apetite/análise , Hidrocortisona , Nutrientes/análiseRESUMO
We evaluated the efficacy of PHENODRAL® product on debilitated cattle, body condition (BC=2) and the influence of this product in clinical and laboratory parameters and weight gain. The experiment was performed using 20 young cattle aged 8 to 12 months, divided into two groups of 10 animals each, five males and five females/group (untreated Control Group - GI and Drug-treated group - Group - GII). The animals of GII received three doses of 15 mL of d PHENODRAL® product administered every six days (D0, D + 6 and D + 12), via IV, and the GI group received 0.9% IV saline administration. The experimental animals were monitored until D+35 The results showed that the weight gain in the GII group was higher in comparison to the control group GI, mainly at the moments before and after the product application, and a significant difference were observed at D + 28 in comparison to GI group. The results for the weekly parameters evaluated: feed intake, weekly weight gain and weekly feed conversion, were statistically different in moments D0 to D + 7, D + 7 to D + 14, D + 14 to D + 21 and D +21 to D + 28 between GI and GII emphasizing that the treated animals ingested greater amount of feed resulting in a higher weight gain due to better feed conversion compared to the control group animals. There were no statistical differences between GI and GII for the clinical, hematological and biochemical parameters evaluated throughout the trial period, however, the serum cortisol levels assessed in the GI group were above the reference values for the bovine species. On the other hand, the cortisol values found in GII decreased after the PHENODRAL® product administration, as well as the glucose concentrations when compared to the GI, thus demonstrating the efficacy of PHENODRAL® product in improving the treated animals performance.(AU)
Avaliou-se a eficácia do produto PHENODRAL® em bovinos debilitados com escore corporal 2 e a influencia deste produto nos parâmetros clínicos, laboratoriais e ganho de peso. O experimento foi realizado no município de Abadia dos Dourados/MG, com 20 bovinos jovens com idade entre 8 a 12 meses, divididos em dois grupos de 10 animais cada, sendo cinco machos e cinco fêmeas/grupo (Grupo Controle GI e Grupo Tratado GII). Os animais do grupo GII receberam três doses de 15 mL do produto PHENODRAL® administrado, a cada seis dias (D0, D+6 e D+12), via I.V., e o grupo GI recebeu administração de solução fisiológica 0,9%, via I.V. Os animais experimentais foram observados até o período D+35 Os resultados mostraram que o ganho de peso no grupo GII foi superior ao grupo controle GI, principalmente, nos momentos antes e após aplicação do produto, e uma diferença estatística mais evidente no momento D+28 em comparação ao GI. Os resultados encontrados para os parâmetros avaliados semanalmente: consumo de ração, ganho de peso semanal e conversão alimentar semanal, foram estatisticamente diferentes nos momentos D0 ao D+7, D+7 ao D+14, D+14 a D+21 e D+21 a D+28 entre os grupos GI e GII ressaltando-se que, os animais tratados ingeriram maior quantidade de ração resultando em um ganho de peso maior em função de melhor conversão alimentar em comparação aos animais do grupo controle. Não foram encontradas diferenças estatísticas entre os grupos GI E GII para os parâmetros clínicos, hematológicos e bioquímicos avaliados durante todo o período experimental, porém, os valores de cortisol sérico avaliados no grupo GI estavam acima dos valores de referencia para a espécie bovina. Por outro lado, os valores de cortisol no grupo GII diminuíram após a aplicação do produto PHENODRAL®assim como as concentrações de glicose em comparação ao GI, demonstrando assim a eficiência do produto PHENODRAL® na melhoria do desempenho dos animais tratados. (AU)
Assuntos
Animais , Bovinos , Estimulantes do Apetite/análise , Aumento de Peso , Hidrocortisona , /análise , Drogas Veterinárias/análise , Nutrientes/análiseRESUMO
BACKGROUND: Ischemia/reperfusion injury during liver transplantation can cause severe damage to the graft. The objective of this randomized, double-blind study was to evaluate the possible protective effects of L-alanyl-glutamine on the liver graft. METHODS: The sample included 33 patients from a liver transplantation service in Northeastern Brazil. Before cold ischemia, the patients received 50 g of L-alanyl-glutamine (treatment group) or saline (control group) through the portal vein. The graft was biopsied at the time of recovery, at the beginning of warm ischemia, and at the end of transplantation to determine malondialdehyde (MDA), heat-shock protein (Hsp)70, nuclear factor kappa-beta (NFkB), superoxide dismutase (SOD), and reduced glutathione (GSH) levels. RESULTS: The blood parameters were similar in the two groups. In the treatment group, MDA did not increase at the beginning of cold ischemia and decreased at the end of transplantation. This phenomenon was not observed in the control group. GSH, SOD, Hsp70, and NFkB levels were similar in the two groups. CONCLUSIONS: Our findings suggest that preconditioning with L-alanyl-glutamine attenuates the effects of ischemia/reperfusion-related oxidative stress and reduces lipid peroxidation in the grafts of liver transplantation patients.