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Registros recuperados: 6
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Chemical and botanical characterization of Chilean propolis and biological activity on cariogenic bacteria Streptococcus mutans and Streptococcus sobrinus BJM
Barrientos,Leticia; Herrera,Christian L.; Montenegro,Gloria; Ortega,Ximena; Veloz,Jorge; Alvear,Marysol; Cuevas,Alejandro; Saavedra,Nicolás; Salazar,Luis A..
Propolis is a non-toxic natural substance with multiple pharmacological properties including anticancer, antioxidant, fungicidal, antibacterial, antiviral, and anti-inflammatory among others. The aim of this study was to determine the chemical and botanical characterization of Chilean propolis samples and to evaluate their biological activity against the cariogenic bacteria Streptococcus mutans and Streptococcus sobrinus. Twenty propolis samples were obtained from beekeeping producers from the central and southern regions of Chile. The botanical profile was determined by palynological analysis. Total phenolic contents were determined using colorimetric assays. Reverse phase HPLC and HPLC-MS were used to determine the chemical composition. The minimum...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Propolis; Botanical characterization; Chemical characterization; Streptococcus mutans; Streptococcus sobrinus.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000200038
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Efecto del Propóleos Chileno sobre el Metabolismo de Glucosa en Ratones Diabéticos International Journal of Morphology
Pacheco,Alejandro; Daleprane,Julio B; Freitas,Vanessa S; Ferderbar,Simone; Hirabara,Sandro; Cuevas,Alejandro; Saavedra,Nicolás; Curi,Rui; Abdalla,Dulcineia S. P; Salazar,Luis A.
En el presente estudio se evaluó el efecto del propóleos sobre el metabolismo de la glucosa en ratones C57/BL-6 con diabetes mellitus tipo 2 inducida por dieta alta en grasa. Se midieron los cambios en las concentraciones séricas de lípidos, glucosa e insulina, y el efecto sobre la captación de 2-deoxi-[2,6-3H]-D-glucosa, síntesis de [14C]-glicógeno y descarboxilación de [U-14C]-D-glucosa inducida por insulina en músculo aislado. Los resultados muestran que en ratones diabéticos, el tratamiento con propóleos (150 mg/kg/día) reduce los niveles de insulina e índice HOMA (P<0.05). También disminuyó la obesidad abdominal de estos animales (P<0.05). Por otro lado, no modificó las concentraciones plasmáticas de glucosa, colesterol total y triglicéridos. Se...
Tipo: Journal article Palavras-chave: Propóleos; Ratones Diabéticos; Polifenoles; Glucosa.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300015
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Effect of Chilean propolis on cariogenic bacteria Lactobacillus fermentum Ciencia e Investigación Agraria
Saavedra,Nicolás; Barrientos,Leticia; Herrera,Christian L; Alvear,Marysol; Montenegro,Gloria; Salazar,Luis A.
Dental caries is an infectious disease of worldwide public health concern. Among the bacteria involved in this pathology are Streptococcus mutans, Streptococcus sobrinus and organisms belonging to the genera Actinomyces and Lactobacillus. The pharmaceutical industry is focussing on the discovery of new antibacterial products after a greater resistance to those already known. Propolis has been used since ancient times, so their effects against various microorganisms have been already investigated. In our study, we evaluated the antimicrobial effect of 6 commercial ethanolic propolis extracts on the bacterium Lactobacillus fermentum. This bacterium was isolated after its identification by Polymerase Chain Reaction using species specific primers, and after...
Tipo: Journal article Palavras-chave: Lactobacillus fermentum; Dental caries; Propolis; Antibacterial activity.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100011
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Effect of Five Single Nucleotide Polymorphisms of ABCG5 and ABCG8 Genes on Ezetimibe Lipid-Lowering Response International Journal of Morphology
Caamaño,José M; Saavedra,Nicolás; Zambrano,Tomás; Lanas,Fernando; Salazar,Luis A.
In this study we evaluated the possible association between five single nucleotide polymorphisms in ABCG5 (rs6720173) and ABCG8 (rs11887534, rs4148211, rs4148217 and rs6544718) genes and ezetimibe response in Chilean hypercholesterolemic subjects. A total of 60 non-related hypercholesterolemic subjects, aged 18 to 65 years old were included in this study. These subjects were treated with ezetimibe (10mg/day) during one month. The ABCG5 and ABCG8 genotypes were assessed by PCR-RFLP. The genotype distribution of the ABCG5/ABCG8 polymorphisms was in Hardy-Weinberg equilibrium. Our results showed that the investigated polymorphisms were not associated with the response to ezetimibe. Nevertheless, the T allele of rs6544718 polymorphism was related to higher...
Tipo: Journal article Palavras-chave: Ezetimibe; Cholesterol; ABCG5/G8; Polymorphisms.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000200055
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Frequency of Common Variants in Genes Involved in Lipid-Lowering Response to Statins in Chilean Subjects with Hypercholesterolemia International Journal of Morphology
Rosales,Alexy; Pacheco,Alejandro; Cuevas,Alejandro; Saavedra,Nicolás; Zambrano,Tomás; Lanas,Fernando; Salazar,Luis A.
Interindividual differences in activity and expression of the metabolizing enzymes cytochrome P450 (CYP) 3A4 and 3A5 and the multidrug efflux pump P-glycoprotein (P-gp, encoded by ABCB1 gene) contribute considerably to lipid-lowering efficacy of statin treatment in subjects with hypercholesterolemia. Variability in the activity of CYP3A4, CYP3A5 and P-gp could be considered to result from genetic polymorphisms encoding their genes. However, the available data indicate that the frequencies of ABCB1, CYP3A4 and CYP3A5 gene polymorphisms differ significantly across populations. Thus, the aim of the present study was to determine the allelic frequency of three common variants of these genes in Chilean individuals with primary hypercholesterolemia (HC) and...
Tipo: Journal article Palavras-chave: Polymorphisms; Statins; Hypercholesterolemia; ABCB1.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000400037
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La Respuesta Terapéutica a Ezetimiba en Ratones C57BL/6 es Mediada por Cambios en la Expresión de NPC1L1, ABCG5 y ABCG8 en el Enterocito International Journal of Morphology
Caamaño,José M; Saavedra,Nicolás; Wulff,Cristian; Salazar,Luis A.
Las proteínas NPC1L1, ABCG5 y ABCG8 participan en la absorción intestinal de colesterol. Ezetimiba inhibe este proceso bloqueando a NPC1L1, sin embargo, su efecto sobre ABCG5 y ABCG8 aún no está claro. Así, el objetivo del presente trabajo fue evaluar en ratones C57BL/6 con hipercolesterolemia inducida por dieta y tratados con ezetimiba, la expresión de NPC1L1, ABCG5 y ABCG8 mediante PCR en tiempo real y Western blot, en 3 grupos de animales: 1, dieta hipercolesterolémica D12336; 2, dieta D12336 más 5 mg/kg/día de ezetimiba; 3, dieta control. El nivel sérico de colesterol total fue significativamente diferente entre los grupos estudiados (control: 1,85 ± 0,49 mmol/L; dieta D12336: 3,11 ± 0,73 mmol/L; ezetimiba: 2,11 ± 0,50 mmol/L, P = 0,001). La expresión...
Tipo: Journal article Palavras-chave: Ezetimiba; Colesterol; NPC1L1; ABCG5/G8.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000200028
Registros recuperados: 6
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