Your browser doesn't support javascript.
Show: 20 | 50 | 100
Results 1 - 20 de 146
Journal of Southern Medical University ; (12): 39-45, 2023.
Article in Chinese | WPRIM | ID: wpr-971492


OBJECTIVE@#To investigate the effect of teriparatide on the differentiation of MC3T3-E1 cells in high-glucose microenvironment and explore the possible mechanism.@*METHODS@#MC3T3-E1 cells cultured in normal glucose or high-glucose (25 mmol/L) medium were treated with 10 nmol/L teriparatide with or without co-treatment with H-89 (a PKA inhibitor). CCK-8 assay was used to detect the changes in cell proliferation, and cAMP content in the cells was determined with ELISA. Alkaline phosphatase (ALP) activity and mineralized nodules in the cells were detected using ALP kit and Alizarin red staining, respectively. The changes in cell morphology were detected by cytoskeleton staining. Real-time PCR was used to detect the mRNA expressions of PKA, CREB, RUNX2 and Osx in the treated cells.@*RESULTS@#The treatments did not result in significant changes in proliferation of MC3T3-E1 cells (P > 0.05). Compared with the cells in routine culture, the cells treated with teriparatide showed significantly increased cAMP levels (P < 0.05) with enhanced ALP activity and increased area of mineralized nodules (P < 0.05). Teriparatide treatment also resulted in more distinct visualization of the cytoskeleton in the cells and obviously up-regulated the mRNA expressions of PKA, CREB, RUNX2 and Osx (P < 0.05). The opposite changes were observed in cells cultured in high glucose. In cells exposed to high glucose, treatment with teriparatide significantly increased cAMP levels (P < 0.05), ALP activity and the area of mineralized nodules (P < 0.05) and enhanced the clarity of the cytoskeleton and mRNA expressions of PKA, CREB, RUNX2 and Osx; the effects of teriparatide was strongly antagonized by co-treatment with H-89 (P < 0.05).@*CONCLUSION@#Teriparatide can promote osteoblast differentiation of MC3T3-E1 cells in high-glucose microenvironment possibly by activating the cAMP/PKA/CREB signaling pathway.

Animals , Mice , Cell Differentiation , Core Binding Factor Alpha 1 Subunit , Glucose/pharmacology , Osteoblasts/drug effects , RNA, Messenger , Signal Transduction , Teriparatide , Cell Line
Chinese Journal of Cellular and Molecular Immunology ; (12): 325-331, 2023.
Article in Chinese | WPRIM | ID: wpr-981872


Objective To investigate the effect of 1, 25-(OH)2-VitD3 (VitD3) on renal tubuleinterstitial fibrosis in diabetic kidney disease. Methods NRK-52E renal tubular epithelial cells were divided into control group (5.5 mmol/L glucose medium treatment), high glucose group (25 mmol/L glucose medium treatment) and high glucose with added VitD3 group (25 mmol/L glucose medium combined with 10-8 mmol/L VitD3). The mRNA and protein expression of Snail1, SMAD3, SMAD4, α-SMA and E-cadherin in NRK-52E cells were detected by real-time quantitative PCR and Western blot analysis respectively. The expression and localization of Snail1, SMAD3 and SMAD4 were detected by immunofluorescence cytochemical staining. The binding of Snail1 with SMAD3/SMAD4 complex to the promoter of Coxsackie-adenovirus receptor (CAR) was detected by chromatin immunoprecipitation. The interaction among Snail1, SMAD3/SMAD4 and E-cadherin were detected by luciferase assay. Small interfering RNA (siRNA) was used to inhibit the expression of Snail1 and SMAD4, and the expression of mRNA of E-cadherin was detected by real-time quantitative PCR. SD rats were randomly divided into control group, DKD group and VitD3-treated group. DKD model was established by injection of streptozotocin (STZ) in DKD group and VitD3-treated group. After DKD modeling, VitD3-treated group was given VitD3 (60 ng/kg) intragastric administration. Control group and DKD group were given normal saline intragastric administration. In the DKD group and VitD3-treated group, insulin (1-2 U/kg) was injected subcutaneously to control blood glucose for 8 weeks. The mRNA and protein levels of Snail1, SMAD3, SMAD4, α-SMA and E-cadherin in renal tissues were detected by real-time quantitative PCR and Western blot analysis respectively. Immunohistochemistry was used to detect the expression and localization of Snail1, SMAD3, SMAD4, α-SMA and E-cadherin in renal tissue. Results Compared with the control group, the mRNA and protein expressions of Snail1, SMAD3, SMAD4 and α-SMA in NRK-52E cells cultured with high glucose and in DKD renal tissues were up-regulated, while E-cadherin expression was down-regulated. After the intervention of VitD3, the expression levels of Snail1, SMAD3, SMAD4, α-SMA and E-cadherin in the DKD model improved to be close to those in the control group. Chromatin immunoprecipitation showed that Snail1 and SMAD3/SMAD4 bound to CAR promoter IV, while VitD3 prevented Snail1 and SMAD3/SMAD4 from binding to CAR promoter IV. Luciferase assay confirmed the interaction among Snail1, SMAD3/SMAD4 and E-cadherin. After the mRNA of Snail1 and SMAD4 was inhibited by siRNA, the expression of E-cadherin induced by high glucose was up-regulated. Conclusion VitD3 could inhibit the formation of Snail1-SMAD3/SMAD4 complex and alleviate the renal tubulointerstitial fibrosis in DKD.

Animals , Rats , Cadherins/genetics , Diabetes Mellitus/pathology , Diabetic Nephropathies/pathology , Epithelial-Mesenchymal Transition , Fibrosis/pathology , Glucose/pharmacology , Kidney/pathology , Rats, Sprague-Dawley , RNA, Messenger , RNA, Small Interfering , Transforming Growth Factor beta1/metabolism , Vitamin D/pharmacology
Chinese Journal of Burns ; (6): 170-183, 2022.
Article in Chinese | WPRIM | ID: wpr-935992


Objective: To establish a high glucose senescent model of human dermal fibroblasts (HDFs), and to investigate the effects of exosomes derived from human decidua mesenchymal stem cells (dMSCs) on the proliferation, migration, and apoptosis of senescent HDFs and possible mechanism. Methods: The experimental research method was used. From January to March 2021, discarded foreskin tissue was collected for isolation and culture of primary HDFs from 4 male phimosis patients (aged 18-22 years) admitted for circumcision in the Fourth Medical Center of the PLA General Hospital. The 6th passage of HDFs were taken and divided into low glucose group and high glucose group according to the random number table, and subsequently cultured in low-glucose complete medium and high-glucose complete medium, respectively, with medium changed every 72 h without subculturing. After 10 days of culture, the cells were taken and measured for cellular senescence using the β-galactosidase kit at 24 h after seeding; the expression of senescence-related proteins p16 and p53 was assessed by Western blotting at 48 h after seeding; cell proliferation was detected at 24, 48, and 72 h after seeding using the cell counting kit 8 (CCK-8) method; the cell proliferation was evaluated by 5-ethynyl-2'-deoxyuridine (EdU) staining method, cell cycle and apoptosis were measured by flow cytometry after 48 h of seeding; Transwell experiment was used for the calculation of cell migration rate at 24 h after seeding. The human dMSCs were taken and cultured for 48-72 h from which the exosomes were extracted by differential high speed centrifugal method. The morphology of dMSC exosomes was observed by transmission electron microscopy, the particle size distribution of dMSC exosomes was measured by nanoparticle tracking analysis, and the expression of dMSC-exosomes marker proteins CD9 and tumor susceptibility gene101 (TSG101) were detected by Western blotting. The dMSC exosomes and high-glucose complete medium-induced senescent HDFs were co-cultured for 24 hours, then PKH67 kit was used to detect the uptake of exosomes by HDFs. High-glucose complete medium-induced senescent HDFs were taken and divided into high glucose alone group, high glucose+low concentration of exosomes group, and high glucose+high concentration of exosomes group according to the same method above. The high-glucose complete medium with equal volume of phosphate buffered saline, dMSC exosomes with final concentration of 50 μg/mL, and dMSC exosomes with final concentration of 100 μg/mL were added to the corresponding groups for conventional cell culture, respectively. After grouped, the cell proliferation, cell cycle and apoptosis as well as cell migration were detected by CCK-8 method and EdU staining method, flow cytometry, and Transwell experiment at the corresponding time points as before, respectively. Based on the previous results, high-glucose complete medium-induced senescent HDFs were taken and divided into high glucose alone group and high glucose+high concentration of exosomes group for the same treatment. After being grouped and cultured for 48 h, real-time fluorescent quantitative polymerase chain reaction was used to evaluate the mRNA expression of senescent-related microRNA (miR)-145-5p, miR-498, miR-503-5p, calcium/calmodulin dependent protein kinase 1D (CAMK1D), phosphates and tensin homologue deleted on chromosome ten (PTEN) gene, and Cyclin D1 in high glucose alone group and high glucose+high concentration of exosomes group. Data were statistically analyzed with analysis of variance for factorial design, one-way analysis of variance, least significant difference t test, and independent sample t test. Results: At 24 h after seeding, the rate of β-galactosidase-positive staining of HDF in high glucose group was (38.4±4.2)%, which was significantly higher than (16.5±2.2)% of low glucose group (t=4.65, P<0.01). At 48 h after seeding, the expression levels of senescence-related proteins p16 and p53 both were significantly higher in HDFs of high glucose group than those in low glucose group (with t values of 11.85 and 3.02, respectively, P<0.05 or P<0.01). At 0, 24, 48, and 72 h after seeding, the cell proliferation viability of HDFs in high glucose group was all significantly lower than in low glucose group (with t values of 4.13, 9.90, and 15.12, respectively, P<0.01). At 48 h after seeding, the rate of EdU-positive staining of HDFs in high glucose group was obviously lower than that of low glucose group (t=3.83, P<0.05). At 48 h after seeding, the percentage of G2/M+S subpopulations in three subpopulations (G0/G1, S, and G2/M) of HDF cycle was significantly lower in high glucose group than that in low glucose group (t=8.74, P<0.01). At 24 h after seeding, the number of HDFs migrated through the filter membrane to the lower chamber was 37±6 in high glucose group, which was significantly less than 74±7 in low glucose group (t=8.42, P<0.01). At 48 h after seeding, the HDF apoptosis rate was significantly higher in high glucose group than in low glucose group (t=8.48, P<0.01). The dMSC exosomes were cup-shaped or round vesicles with well-defined edges and uniform size distribution. The size of dMSC exosomes was basically in the range of 80-200 nm. Exosomal markers including CD9 and TSG101 were positively presented on the dMSC exosomes. After being co-cultured for 24 hours, the dMSC exosomes were taken up intracellularly by HDFs and mainly distributed around the nucleus of HDFs. After being grouped and cultured for 24, 48, and 72 h, the HDF proliferation viabilities in high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group were both significantly higher than in high glucose alone group (with t values of 6.36, 6.10, 7.76, 8.92, 12.17, and 10.74, respectively, P<0.01), the HDF proliferation viability in high glucose+high concentration of exosomes group was significantly higher than in high glucose+low concentration of exosomes group (with t values of 7.92, 4.82, and 4.72, respectively, P<0.01). After being grouped and cultured for 48 h, the percentages of EdU-positive HDFs in high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group were both significantly higher than in high glucose alone group (with t values of 5.32 and 9.88, respectively, P<0.01), the percentage of EdU-positive HDFs in high glucose+high concentration of exosomes group was notably higher than in high glucose+low concentration of exosomes group (t=5.27, P<0.01). After being grouped and cultured for 48 h, the proportion of G0/G1 subpopulation in both high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group was distinctly lower (with t values of 3.81 and 4.31, respectively, P<0.05), while the proportion of G2/M+S subpopulation was markedly higher (with t values of 3.81, 4.31, respectively, P<0.05) than in high glucose alone group. After being grouped and cultured for 24 h, the number of HDFs migrated through the filter membrane in both high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group was significantly higher than in high glucose alone group (with t values of 10.14 and 13.39, respectively, P<0.01), the number of HDFs migrated through the filter membrane in high glucose+high concentration of exosomes group was significantly increased than in high glucose+low concentration of exosomes group (t=6.27, P<0.01). After being grouped and cultured for 48 h, the HDF apoptosis rates in high glucose+low concentration of exosomes group and high glucose+high concentration of exosomes group were both significantly lower than in high glucose alone group (with t values of 3.72 and 5.53, respectively, P<0.05 or P<0.01). After being grouped and cultured for 48 h, compared with those in high glucose alone group, the mRNA expression levels of miR-145-5p and miR-498 were both obviously higher (with t values of 13.03 and 8.90, respectively, P<0.01), while the mRNA expression level of miR-503-5p was significantly lower (t=3.85, P<0.05) in high glucose+high concentration of exosomes group. After being grouped and cultured for 48 h, compared with those in high glucose alone group, the mRNA expression levels of CAMK1D and PTEN gene were both significantly lower (with t values of 8.83 and 5.97, respectively, P<0.01), while the mRNA expression level of Cyclin D1 was significantly higher in high glucose+high concentration of exosomes group (t=4.03, P<0.05). Conclusions: The dMSC exosomes are capable of improving cell proliferation and migration, and inhibiting cell apoptosis of high-glucose senescent HDFs. This may be related to the mechanism by which the increased expressions of intracellular miR-145-5p and miR-498 inhibit the expression of CAMK1D and PTEN gene, and the decreased expression of miR-503-5p promote the expression of Cyclin D1.

Adolescent , Adult , Female , Humans , Male , Young Adult , Cell Proliferation , Decidua , Exosomes , Fibroblasts , Glucose/pharmacology , Mesenchymal Stem Cells , MicroRNAs
Journal of Experimental Hematology ; (6): 890-896, 2022.
Article in Chinese | WPRIM | ID: wpr-939706


OBJECTIVE@#To investigate the anti-oxidative effect of ethyl pyruvate (EP) and taurine (TAU) on the quality of red blood cells stored at 4±2 ℃, hemolysis, energy metabolism and lipid peroxidation of the red blood cells in the preservation solution were studied at different intervals.@*METHODS@#At 4±2 ℃, the deleukocyte red blood cells were stored in the citrate-phosphate-dextrosesaline-adenine-1 (CPDA-1) preservation (control group), preservation solution with EP (EP-AS), and TAU (TAU-AS) for long-term preservation. The enzyme-linked immunoassay and automatic blood cell analyzer were used to detect hemolysis and erythrocyte parameters. Adenine nucleoside triphosphate (ATP), glycerol 2,3-diphosphate (2,3-DPG) and malondialdehyde (MDA) kits were used to test the ATP, 2,3-DPG and MDA concentration.@*RESULTS@#During the preservation, the rate of red blood cell hemolysis in EP-AS and TAU-AS groups were significantly lower than that in CPDA-1 group (P<0.01). The MCV of EP-AS group was increased with the preservation time (r=0.71), while the MCV of the TAU-AS group was significantly lower than that in the other two groups (P<0.05). The concentration of ATP and MDA in EP-AS and TAU-AS groups were significantly higher than that in CPDA-1 group at the 14th day (P<0.01). The concentrations of 2,3-DPG in the EP-AS and TAU-AS groups were significantly higher than that in the CPDA-1 group from the 7th day (P<0.01).@*CONCLUSION@#EP and TAU can significantly reduce the red blood cell hemolysis rate, inhibit the lipid peroxidation level of red blood cells, and improve the energy metabolism of red blood cells during storage. The mechanism of EP and TAU may be related to their antioxidation and membrane protection effect, so as to improve the red blood cell quality and extend the preservation time.

Humans , 2,3-Diphosphoglycerate/metabolism , Adenine , Adenosine Triphosphate/metabolism , Blood Preservation , Citrates/pharmacology , Erythrocytes/metabolism , Glucose/pharmacology , Hemolysis , Pyruvates , Taurine/pharmacology
Acta Physiologica Sinica ; (6): 392-400, 2022.
Article in Chinese | WPRIM | ID: wpr-939574


The aim of the present study was to observe the effects of Notch1 and autophagy on extracellular matrix deposition in renal tubulointerstitium of diabetes and to explore the mechanism. The mice were randomly divided into normal control group (db/m mice) and diabetes group (db/db mice). After 12 weeks of feeding, the mice were sacrificed and the corresponding biochemical indexes were measured. Rat renal tubular epithelial cells NRK52E were cultured under normal glucose (NG) and high glucose (HG) respectively, and the expression of Notch1 and LC3 proteins were detected by Western blotting. Autophagosomes in NRK52E cells with overexpressed and knockdown Notch1 under NG and HG conditions were observed by confocal microscope, and the expression changes of Notch1, Collagen-I and III protein were detected by immunofluorescence. The results showed that the Notch1 and Collagen-III expressions were increased (P < 0.01) and the LC3 expression was decreased (P < 0.05) in db/db mice compared with db/m mice. In vitro, the Notch1 was increased (P < 0.01) and the LC3 expression was decreased significantly (P < 0.01) in NRK52E cells of HG group compared with NG group. There was no significant change of Notch1 and LC3 expression between the mannitol (MA) group and the NG group. Autophagy was decreased and extracellular matrix deposition was aggravated when Notch1 was overexpressed. In contrast, autophagy was increased and extracellular matrix deposition was relieved by knockdown of Notch1 under HG conditions. In conclusion, Notch1 protein expression was increased and autophagy was reduced in renal tissue of diabetes and renal tubular epithelial cells under HG. The extracellular matrix deposition in the renal tubulointerstitium was relieved by regulating autophagy after the knockdown of Notch1.

Animals , Mice , Rats , Autophagy/physiology , Diabetes Mellitus , Extracellular Matrix , Glucose/pharmacology , Kidney , Receptor, Notch1/genetics
Journal of Southern Medical University ; (12): 584-590, 2022.
Article in Chinese | WPRIM | ID: wpr-936351


OBJECTIVE@#To explore the effect of inhibiting polyribonucleotide nucleotidyl-transferase 1 (PNPT1) on oxygen-glucose deprivation (OGD)-induced apoptosis of mouse atrial myocytes.@*METHODS@#Cultured mouse atrial myocytes (HL-1 cells) with or without OGD were transfected with PNPT1-siRNA or a negative control siRNA (NC-siRNA group), and the cell survival rate was detected using CCK-8 assay. The expression levels of ACTB and TUBA mRNA were detected with qPCR, and the protein expression of PNPT1 was detected with Western blotting. The apoptosis rate of the treated cells was determined with flow cytometry, the mitochondrial membrane potential was detected using JC-1 kit, and the mitochondrial morphology was observed using transmission electron microscope.@*RESULTS@#With the extension of OGD time, the protein expression levels of PNPT1 increased progressively in the cytoplasm of HL-1 cells (P < 0.05). Transfection with PNPT1-siRNA significantly reduced PNPT1 expression in HL-1 cells (P < 0.05). Exposure to OGD significantly enhanced degradation of ACTB and TUBA mRNA (P < 0.05) and markedly increased the apoptosis rate of HL-1 cells (P < 0.05), and these changes were significantly inhibited by transfection with PNPT1-siRNA (P < 0.05), which obviously increased mitochondrial membrane potential and improved mitochondrial morphology of HL-1 cells exposed to OGD.@*CONCLUSION@#Inhibition of PNPT1 improves mitochondrial damage and reduces degradation of apoptotic-associated mRNAs to alleviate OGD-induced apoptosis of mouse atrial myocyte.

Animals , Mice , Apoptosis , Cell Survival , Glucose/pharmacology , Myocytes, Cardiac , Oxygen/metabolism , RNA, Messenger/metabolism , RNA, Small Interfering/metabolism
Journal of Southern Medical University ; (12): 463-472, 2022.
Article in Chinese | WPRIM | ID: wpr-936338


OBJECTIVE@#To investigate the effects of wogonoside on high glucose-induced dysfunction of human retinal microvascular endothelial cells (hRMECs) and streptozotocin (STZ)-induced diabetic retinopathy in rats and explore the underlying molecular mechanism.@*METHODS@#HRMECs in routine culture were treated with 25 mmol/L mannitol or exposed to high glucose (30 mmol/L glucose) and treatment with 10, 20, 30, 40 μmol/L wogonoside. CCK-8 assay and Transwell assay were used to examine cell proliferation and migration, and the changes in tube formation and monolayer cell membrane permeability were tested. ROS, NO and GSH-ST kits were used to evaluate oxidative stress levels in the cells. The expressions of IL-1β and IL-6 in the cells were examined with qRT-PCR and ELISA, and the protein expressions of VEGF, HIF-1α and SIRT1 were detected using Western blotting. We also tested the effect of wogonoside on retinal injury and expressions of HIF-1α, ROS, VEGF, TNF-α, IL-1β, IL-6 and SIRT1 proteins in rat models of STZ-induced diabetic retinopathy.@*RESULTS@#High glucose exposure caused abnormal proliferation and migration, promoted angiogenesis, increased membrane permeability (P < 0.05), and induced inflammation and oxidative stress in hRMECs (P < 0.05). Wogonoside treatment concentration-dependently inhibited high glucose-induced changes in hRMECs. High glucose exposure significantly lowered the expression of SIRT1 in hRMECs, which was partially reversed by wogonoside (30 μmol/L) treatment; interference of SIRT1 obviously attenuated the inhibitory effects of wogonoside against high glucose-induced changes in proliferation, migration, angiogenesis, membrane permeability, inflammation and oxidative stress in hRMECs. In rat models of STZ-induced diabetic retinopathy, wogonoside effectively suppressed retinal thickening (P < 0.05), alleviated STZ-induced retinal injury, and increased the expression of SIRT1 in the retinal tissues (P < 0.001).@*CONCLUSION@#Wogonoside alleviates retinal damage caused by diabetic retinopathy by up-regulating SIRT1 expression.

Animals , Rats , Diabetes Mellitus/metabolism , Diabetic Retinopathy/metabolism , Endothelial Cells , Flavanones , Glucose/pharmacology , Glucosides , Inflammation/metabolism , Interleukin-6/metabolism , Neovascularization, Pathologic/metabolism , Reactive Oxygen Species/metabolism , Sirtuin 1/metabolism , Streptozocin/pharmacology , Vascular Endothelial Growth Factor A/metabolism
Braz. J. Pharm. Sci. (Online) ; 58: e18837, 2022. tab, graf
Article in English | LILACS | ID: biblio-1374558


Abstract Recently, the acetate wheat starch (AWS) has been prepared by acetylation with an acetyl content of 2.42%, containing of rapidly digestible starch (RDS), slowly digestible starch (SDS) and resistant starch (RS) with 25.0%; 22.9% and 34.5%, respectively. In this study, this kind of starch was continuously evaluated with the postprandial blood glucose response and determined short-chain fatty acids (SCFAs) metabolized from AWS in the gastrointestinal tract of healthy mice by HPLC. The result showed that the mice fed with AWS exhibited a very limited increase in blood glucose level and remained stable for 2 hours after meals efficiently comparing with the control group fed with natural wheat starch (NWS). Simultaneously, the content of SCFAs produced in the caecum of the mice fed with AWS was significantly higher than mice fed with NWS, especially with acetic and propionic acids by 28% and 26%, respectively. Thus, AWS has shown to limit the postprandial hyperglycemia in mice effectively through the resistance to amylase hydrolysis in the small intestine. When going into the caecum, it is fermented to form SCFAs providing a part of energy for the body's activities, avoiding rotten fermentation causing digestive disorders which are inherent restrictions of normal high cellulose and fiber food.

Animals , Male , Female , Mice , Starch/adverse effects , Triticum/classification , Hyperglycemia/pathology , Acetates/agonists , Chromatography, High Pressure Liquid/methods , Gastrointestinal Tract/abnormalities , Food/classification , Glucose/pharmacology
Ribeirão Preto; s.n; 2021. 75 p. ilus, tab.
Thesis in Portuguese | LILACS, BDENF | ID: biblio-1373487


É notório o papel do diabetes mellitus como fator de risco para o desenvolvimento de doenças bucais, como a candidíase bucal, cárie e a periodontite. Assim, este estudo tem como objetivo avaliar a formação de biofilme por cepas de Candida spp. provenientes de diabéticos e não diabéticos em ambiente sem e com suplementação de glicose. Trata-se de um estudo experimental laboratorial in vitro, em três etapas. Etapas um e dois, de obtenção e identificação de 48 cepas de Candida spp., sendo que 32 de C. albicans e 16 de C. glabrata, com auxílio da técnica de PCR. Ainda, a etapa três, de processamento microbiológico, com a avaliação da capacidade de formação de biofilme por três ensaios distintos: I) determinação do número de unidades formadoras de colônia (UFC/mL); II) matéria seca dos biofilmes; III) taxa de crescimento de biofilme em fundo de placa de poliestireno. Inicialmente, objetivando simular as características observadas in vivo, o fundo das placas de cultivo recebeu 400 µL de saliva humana para formação da película adquirida. Decorrida a incubação a 37 °C por 24 h, a saliva foi descartada e cada poço de cultura recebeu suspensão padronizada das leveduras (106 UFC/mL) em Saubouraud Dextrose Broth sem suplementação e com suplementação de glicose a 2 e 10 mg/mL, e as placas foram incubadas a 37 °C por 48 h. Para avaliação do número de UFC/mL, o biofilme aderido foi coletado, diluído seriamente e cultivado em placas de Petri com Sabouraud Dextrose Agar. Após incubação os resultados foram expressos em log UFC/mL. Para a avaliação da matéria seca, a solução remanescente foi liofilizada e mensurada em balança de precisão. A taxa de crescimento de biofilme foi avaliada por microscopia Operetta CLS High Content e o FilmTracer(TM) LIVE/DEAD Biofilm Viability kit, conforme o protocolo do fabricante. Posteriormente, 10 imagens por poço foram obtidas e digitalizadas com ampliação de 40 ×. A área recoberta por biofilme (µm2) das imagens foi avaliada com auxílio do software Harmony High Content Imaging. Os dados apresentaram distribuição não normal, e a comparação entre as cepas de diabéticos e não diabéticos foi realizada pelo teste U Mann-Whitney. O teste de Kruskal-Wallis one way foi utilizado para verificar diferenças entre as condições de suplementação de glicose. O nível de significância estatística adotado foi de α = 5%. Os valores de UFC/mL mostraram um maior crescimento das cepas de C. albicans dos pacientes diabéticos em relação aos não diabéticos nas três suplementações (p < 0,001). Por outro lado, acerca da matéria seca em 10 mg/mL e da taxa de crescimento de biofilme sem suplementação de glicose e a 2 mg/mL, os resultados indicaram uma formação de biofilme maior para cepas de C. albicans dos não diabéticos (p < 0,001). Em conclusão, cepas de C. albicans e C. glabrata provenientes de diabéticos e não diabéticos em ambiente sem e com suplementação de glicose apresentaram resultados distintos quanto à formação de biofilme, por diferentes técnicas

The role of diabetes mellitus is notorious as a risk factor for development of oral diseases, such as oral candidiasis, dental caries, and periodontitis. Thus, this study aimed to evaluate biofilm formation by Candida spp. strains from diabetic and non-diabetic individuals in environment without and with glucose supplementation. This is an in vitro experimental laboratory study, in three stages. Stages one and two of obtainment and identification of 48 Candida spp. strains, with 32 of C. albicans and 16 of C. glabrata, with the help of PCR technique. Also, stage three, of microbiological processing, with evaluation of biofilm formation capacity by three different assays: I) determination of the number of colony forming units (CFU/mL); II) biofilm dry matter; III) biofilm growth rate on the bottom of polystyrene plates. Initially, aiming to simulate the characteristics observed in vivo, the bottom of the cultivation plates received 400 µL of human saliva for formation of acquired pellicle. After the incubation at 37 °C for 24 h, the saliva was discarded and each culture well received standardized suspension of yeast (106 CFU/mL) in Saubouraud Dextrose Broth without supplementation and with glucose supplementation at 2 and 10 mg/mL, and the plates were incubated at 37 °C for 48 h. To assess the number of CFU/mL, the adhered biofilm was collected, seriously diluted, and cultivated in Petri dishes with Sabouraud Dextrose Agar. After the incubation, the results were expressed in log CFU/mL. To assess the dry matter, the remaining solution was lyophilized and measured on a precision scale. The biofilm growth rate was evaluated by Operetta CLS High Content microscopy and FilmTracer(TM) LIVE/DEAD Biofilm Viability kit, according to manufacturer's protocol. Later, 10 images per well were obtained and digitalized with 40 × magnification. The area covered by biofilm (µm2) of the images was assessed with the help of Harmony High Content Imaging software. Data showed non-normal distribution, and the comparison among the diabetic and non-diabetic strains was performed by Mann-Whitney U test. Kruskal-Wallis one-way test was used to verify differences between conditions of glucose supplementation. The level of statistical significance adopted was α = 5%. The values of CFU/mL showed greater growth of the diabetic patient's strains in relation to the non-diabetic ones (p < 0.001). On the other hand, regarding dry matter at 10 mg/mL and the growth rate of biofilm without glucose supplementation and at 2 mg/mL, the results indicated a higher biofilm formation for strains of C. albicans from non-diabetic individuals (p <0.001). In conclusion, C. albicans and C. glabrata strains from diabetic and non-diabetic individuals in environment without and with glucose supplementation showed different results concerning the biofilm formation, using different techniques

Humans , Candida albicans/physiology , Biofilms/growth & development , Biofilms/drug effects , Candida glabrata/physiology , Diabetes Mellitus/microbiology , Glucose/pharmacology , Candidiasis, Oral
Braz. j. med. biol. res ; 53(2): e8616, 2020. graf
Article in English | LILACS | ID: biblio-1055497


Previous research has shown that suppression of miR-383 can prevent inflammation of the endothelium, as well as postpone the development of atherosclerosis. However, the role of miR-383 in endothelial cell apoptosis in diabetes remains unclear. The aim of this study was to investigate the function of miR-383 in high glucose-induced apoptosis and oxidative stress in endothelial cells. A series of experiments involving qualitative polymerase chain reaction, cell transfection, luciferase assay, assessment of cell death, detection of catalase and superoxide dismutase concentrations, detection of intracellular reactive oxygen species (ROS), and western blot analysis were performed in this study. We found that miR-383 expression was promoted, while NAD+-dependent deacetylase and sirtuin 1 (SIRT1) expressions were suppressed in the endothelium of the aorta in db/db mice as well as in human umbilical vein endothelial cells, which were treated with high glucose (HG). Increased expression of miR-383 decreased expression of SIRT1, while suppression of miR-383 promoted expression of SIRT1 in human umbilical vein endothelial cells (HUVECs). Furthermore, suppression of miR-383 following transfection with miR-383 suppressor repressed cell death and generation of ROS in HUVECs. SIRT1 knockdown by siRNA-SIRT1 reversed the suppressive effect of miR-383 inhibition on ROS production and cell apoptosis induced by HG treatment. Overall, the findings of our research suggested that suppression of miR-383 repressed oxidative stress and reinforced the activity of endothelial cells by upregulation of SIRT1 in db/db mice, and targeting miR-383 might be promising for effective treatment of diabetes.

Animals , Male , Rabbits , Endothelium, Vascular/drug effects , Apoptosis/drug effects , Oxidative Stress/drug effects , MicroRNAs/antagonists & inhibitors , Sirtuin 1/metabolism , Glucose/pharmacology , Endothelium, Vascular/cytology , Endothelium, Vascular/physiology , Signal Transduction , Cells, Cultured , Mice, Inbred C57BL
Rev. argent. microbiol ; 51(3): 208-213, set. 2019. ilus, tab
Article in Spanish | LILACS | ID: biblio-1041826


La capacidad de formar biopelículas de los microorganismos patógenos en gran variedad de ambientes, superficies y condiciones trae consigo un importante riesgo, tanto para la industria alimentaria como para la salud pública. Este trabajo tuvo como objetivo evaluar y comparar los efectos de la metodología empleada y de los medios de cultivo utilizados, sobre la capacidad de una cepa de Escherichia coli verotoxigénica no O157 y una enteropatogénica de formar biopelículas sobre una superficie de poliestireno. Se ensayaron 2 variantes metodológicas en cultivo estático y se utilizaron medios de cultivo con diferente composición. Los resultados mostraron que ambas cepas formaron una mayor cantidad de biopelícula en cultivo en LB suplementado con glucosa, con recambio del medio a las 24 h y la cuantificación de la biopelícula realizada a las 48 h de incubación. Dichas condiciones podrían ser utilizadas en futuros estudios sobre formación de biopelícula.

The ability to form biofilms of pathogenic microorganisms in a wide variety of environments, surfaces and conditions constitute an important risk, both for the food industry and for public health. The aim of this work was to evaluate and to compare the effects of the methodology applied and the culture medium used on the ability of a non-O157 verotoxigenic Escherichia coli strain and an enteropathogenic strain to form biofilm on polystyrene surface. Two methodological variants were tested in static culture and culture mediums with different composition were used. The results showed that both strains were able to form a greater biofilm under culture in LB supplemented with glucose, with medium replacement at 24 h and the quantification of the biofilm carried out at 48 h of incubation. These conditions could be used in future studies on biofilm formation.

Biofilms/drug effects , Culture Media/pharmacology , Enteropathogenic Escherichia coli/drug effects , Shiga-Toxigenic Escherichia coli/drug effects , Polystyrenes , Species Specificity , Bacteriological Techniques , Biofilms/growth & development , Enteropathogenic Escherichia coli/physiology , Enteropathogenic Escherichia coli/pathogenicity , Shiga-Toxigenic Escherichia coli/physiology , Shiga-Toxigenic Escherichia coli/pathogenicity , Glucose/pharmacology
Acta cir. bras ; 34(4): e201900402, 2019. tab, graf
Article in English | LILACS | ID: biblio-1001091


Abstract Purpose: To evaluate the effect of amniotic fluid in liver preservation in organ transplantation, and compare it with standard preservation solutions. Methods: The groups consisted of Group 1: Ringer Lactate (RL) group, Group 2: HTK group, Group 3: UW group, Group 4: AF group. The livers of rats from Group 1, 2, 3, and 4 were perfused and placed into falcon tubes containing RL, HTK, UW, and AF solutions at +4‎°C, respectively. The tubes were stored for 12 hours in the refrigerator at +4°C. Tissue samples were taken at the 6th and 12th hours for histopathological examinations of the perfused livers, and storage solutions for biochemical analyzes at 6th and 12th hours. Results: AF was shown to maintain organ viability by reducing the number of cells undergoing apoptosis. Histopathological changes such as sinusoidal dilatation, hydropic degeneration, and focal necrosis were found to be similar to the groups in which the standard organ preservation solutions were used. Additionally, the results of INOS, IL-10, and TNF-α,which were evaluated immunohistochemically, have been shown to be similar to the UW and HTK groups. Conclusions: AF provided conservation similar to UW and HTK in the 12-hour liver SCS process. The fact that apoptosis values are comparable to standard preservation solutions supports the success of AF in the cold storage of the liver.

Animals , Male , Cryopreservation/methods , Organ Preservation Solutions/pharmacology , Amniotic Fluid , Liver/blood supply , Liver/pathology , Organ Preservation/methods , Potassium Chloride/pharmacology , Procaine/pharmacology , Reference Values , Time Factors , Tissue Survival , Immunohistochemistry , Reperfusion Injury/prevention & control , Random Allocation , Reproducibility of Results , Tumor Necrosis Factor-alpha/analysis , Interleukin-10/analysis , Rats, Wistar , In Situ Nick-End Labeling , Nitric Oxide Synthase Type II/analysis , Ringer's Solution/pharmacology , Glucose/pharmacology , Mannitol/pharmacology
J. bras. pneumol ; 45(4): e20170288, 2019. graf
Article in English | LILACS | ID: biblio-1040273


ABSTRACT Liquid perfluorocarbon (PFC) instillation has been studied experimentally as an adjuvant therapy in the preservation of lung grafts during cold ischemia. The objective of this study was to evaluate whether vaporized PFC is also protective of lung grafts at different cold ischemia times. We performed histological analysis of and measured oxidative stress in the lungs of animals that received only preservation solution with low-potassium dextran (LPD) or vaporized PFC together with LPD. We conclude that vaporized PFC reduces the production of free radicals and the number of pulmonary structural changes resulting from cold ischemia.

RESUMO O perfluorocarbono (PFC) líquido tem sido estudado experimentalmente como uma substância adjuvante na preservação de enxertos pulmonares durante o período de isquemia fria. O objetivo deste estudo foi avaliar se o PFC vaporizado (e não instilado) também atuaria como protetor de enxertos pulmonares em diferentes tempos de isquemia fria. Realizamos análise histológica e dosamos o estresse oxidativo em pulmões de animais que receberam somente uma solução de preservação com low-potassium dextran (LPD, dextrana com baixa concentração de potássio) ou PFC vaporizado associado a LPD. Concluímos que o PFC vaporizado reduziu a produção de radicais livres e provocou menor número de alterações estruturais pulmonares decorrentes do período de isquemia fria que o uso de LPD isoladamente.

Humans , Organ Preservation/methods , Lung Transplantation/methods , Oxidative Stress/drug effects , Cold Ischemia/methods , Fluorocarbons/pharmacology , Lung/drug effects , Reference Values , Time Factors , Reproducibility of Results , Dextrans/pharmacology , Organ Preservation Solutions , Glucose/pharmacology , Lung/pathology
Rev. Soc. Bras. Med. Trop ; 52: e20180182, 2019. tab, graf
Article in English | LILACS | ID: biblio-1041508


Abstract INTRODUCTION: Administration of total parenteral nutrition (TPN) via catheters increases the risk for candidemia from Candida parapsilosis. METHODS: C. parapsilosis sensu stricto blood isolates were evaluated for ability total biomass biofilm formation and morphogenesis in presence of glucose at TPN equivalent concentrations. RESULTS: Biofilms were increased at high glucose concentrations (25-30%) compared to the control medium. Significant increase in filamentous forms was observed in cultures with 30% glucose. CONCLUSIONS: Biofilm formation by C. parapsilosis sensu stricto in hyperglycidic medium may contribute to its pathogenic potential for fungemia related to TPN catheters.

Humans , Biofilms/growth & development , Candida parapsilosis/physiology , Glucose/pharmacology , Colony Count, Microbial , Parenteral Nutrition, Home Total , Biofilms/drug effects , Culture Media/chemistry
Rev. bras. cir. cardiovasc ; 33(3): 211-216, May-June 2018. tab, graf
Article in English | LILACS | ID: biblio-958403


Abstract Objective: The present study aimed the functional recovery evaluation after long term of cardiac arrest induced by Custodiol (crystalloid-based) versus del Nido (blood-based) solutions, both added lidocaine and pinacidil as cardioplegic agents. Experiments were performed in isolated rat heart perfusion models. Methods: Male rat heart perfusions, according to Langendorff technique, were induced to cause 3 hours of cardiac arrest with a single dose. The hearts were assigned to one of the following three groups: (I) control; (II) Custodiol-LP; and (III) del Nido-LP. They were evaluated after ischemia throughout 90 minutes of reperfusion. Left ventricular contractility function was reported as percentage of recovery, expressed by developed pressure, maximum dP/dt, minimum dP/dt, and rate pressure product variables. In addition, coronary resistance and myocardial injury marker by alpha-fodrin degradation were also evaluated. Results: At 90 minutes of reperfusion, both solutions had superior left ventricular contractile recovery function than the control group. Del Nido-LP was superior to Custodiol-LP in maximum dP/dt (46%±8 vs. 67%±7, P<0.05) and minimum dP/dt (31%±4 vs. 51%±9, P<0.05) variables. Coronary resistance was lower in del Nido-LP group than in Custodiol-LP (395%±50 vs. 307%±13, P<0.05), as well as alpha-fodrin degradation, with lower levels in del Nido-LP group (P<0.05). Conclusion: Del Nido-LP cardioplegia showed higher functional recovery after 3 hours of ischemia. The analysis of alpha-fodrin degradation showed del Nido-LP solution provided greater protection against myocardial ischemia and reperfusion (IR) in this experimental model.

Animals , Male , Cardioplegic Solutions/pharmacology , Myocardial Reperfusion/methods , Potassium Compounds/pharmacology , Pinacidil/pharmacology , Heart Arrest, Induced/methods , Lidocaine/pharmacology , Time Factors , Vascular Resistance/physiology , Cardioplegic Solutions/chemistry , Carrier Proteins/analysis , Blotting, Western , Rats, Wistar , Coronary Vessels/physiopathology , Glucose/pharmacology , Glucose/chemistry , Heart/drug effects , Mannitol/pharmacology , Mannitol/chemistry , Microfilament Proteins/analysis
Braz. j. med. biol. res ; 51(1): e6378, 2018. tab
Article in English | LILACS | ID: biblio-889003


The aim of this study was to discuss the safety and efficacy of regional citrate anticoagulation (RCA) on continuous blood purification (CBP) during the treatment of multiple organ dysfunction syndrome (MODS). Thirty-five patients with MODS were divided into two groups: the local citrate anticoagulation (RCA) group, and the heparin-free blood purification (hfBP) group. The MODS severity was assessed according to Marshall's MODS score criteria. Blood coagulation indicators, blood pressure, filter lifespan, filter replacement frequency, anticoagulation indicators, and main metabolic and electrolyte indicators were analyzed and compared between RCA and hfBP groups. RCA resulted in lower blood pressure than hfBP. The filter efficacy in RCA treatment was longer than in the hfBP group. The blood clearance of creatine, blood urea nitrogen and uric acid was better in the RCA group. RCA also led to higher pH than hfBP. Neither treatment resulted in severe bleeding events. In addition, MODS score was positively correlated with prothrombin time and activated partial thromboplastin time but negatively correlated with platelet concentration. RCA is a safer and more effective method in CBP treatment; however, it could also lead to low blood pressure and blood alkalosis.

Humans , Male , Female , Adult , Middle Aged , Aged , Hemofiltration/methods , Citrates/pharmacology , Citric Acid/pharmacology , Glucose/pharmacology , Multiple Organ Failure/therapy , Anticoagulants/pharmacology , Reference Values , Severity of Illness Index , Blood Coagulation/drug effects , Heparin/pharmacology , Reproducibility of Results , Treatment Outcome , Anticoagulants/therapeutic use
Biol. Res ; 51: 22, 2018. graf
Article in English | LILACS | ID: biblio-950906


BACKGROUND: Our study aimed to investigate the roles of autophagy against high glucose induced response in retinal pigment epithelium (ARPE-19 cells). METHODS: The morphological changes and reactive oxygen species (ROS) generation in ARPE-19 cells under high glucose treatment were respectively detected using the transmission electron microscopy and flow cytometry. The expression levels of Parkin, PINK1, BNIP3L, LC3-I and LC3-II in ARPE-19 cells received high glucose treatment were measured by western blot after pretreatment of carbonyl cyanide m-chlorophenylhydrazone (CCCP), 3-methyladenine (3-MA), N-acetyl cysteine (NAC) or cyclosporin A (CsA) followed by high glucose treatment. RESULTS: ARPE-19 cells subjected to high glucose stress showed an obvious reduction in the LC3-I expression and significant increase in the number of autophagosomes, in the intracellular ROS level, and in the expression levels of Parkin, PINK1, BNIP3L and LC3-II (p < 0.05). Pretreatment with CCCP significantly reduced the LC3-I expression and increased the expression levels of Parkin, PINK1, BNIP3L and LC3-II (p < 0.05). ARPE-19 cells pretreated with CsA under high glucose stress showed markedly down-regulated expressions of Parkin, PINK1 and BNIP3L compared with the cells treated with high glucose (p < 0.05). Pretreatment of ARPE-19 cells with NAC or 3-MA under high glucose stress resulted in a marked reduction in the expression levels of PINK1, BNIP3L and LC3-II (p < 0.05). Meanwhile, the expression level of Parkin in the ARPE-19 cells pretreated with NAC under high glucose stress was comparable with that in the control cells. CONCLUSION: Autophagy might have protective roles against high glucose induced injury in ARPE19 cells via regulating PINK1/Parkin pathway and BNIP3L.

Humans , Protein Kinases/drug effects , Autophagy/drug effects , Proto-Oncogene Proteins/drug effects , Tumor Suppressor Proteins/drug effects , Ubiquitin-Protein Ligases/drug effects , Retinal Pigment Epithelium/drug effects , Glucose/pharmacology , Membrane Proteins/drug effects , Protein Kinases/metabolism , Autophagy/physiology , Signal Transduction/physiology , Cell Line , Proto-Oncogene Proteins/metabolism , Reactive Oxygen Species/metabolism , Tumor Suppressor Proteins/metabolism , Ubiquitin-Protein Ligases/metabolism , Microscopy, Electron, Transmission , Retinal Pigment Epithelium/cytology , Flow Cytometry , Membrane Proteins/metabolism
São Paulo; s.n; 2018. 108 p.
Thesis in Portuguese | LILACS | ID: biblio-916041


Introdução: O diabetes mellitus (DM) está associado a complicações que comprometem a qualidade de vida e a sobrevida dos indivíduos. Além disso, acarreta elevados custos para o controle metabólico e o tratamento de suas complicações, sendo assim caracterizado como um problema de saúde pública. A regulação da digestão e da absorção intestinal dos carboidratos, com vista a manter a homeostase da glicose plasmática, constituem importantes estratégias de proteção em condições clínicas como o diabetes tipo 2 (DM2), obesidade e síndrome metabólica. Os compostos fenólicos compreendem um grupo complexo de fitoquímicos bioativos presentes nos vegetais. Estudos in vitro e in vivo têm demonstrado que os compostos fenólicos inibem a atividade de carbohidrases (α-amilase e α-glicosidase) e o transporte intestinal de glicose mediado pelos transportadores SGLT1 e GLUT2. O cerrado brasileiro compreende uma larga biodiversidade, porém, apesar de muitas espécies terem sido identificadas, o seu potencial nutritivo e funcional ainda é pouco conhecido. Dentre estas espécies nativas é destacado o jatobá-do-cerrado. O jatobá-do-cerrado é uma leguminosa nativa brasileira, cuja a polpa farinácea que envolve suas sementes apresenta quantidades significativas de compostos fenólicos, podendo ter um potencial efeito sobre o metabolismo da glicose. Objetivos: Verificar os efeitos dos compostos fenólicos da farinha de jatobá-do-cerrado na digestão de carboidratos e na captação de glicose em células intestinais Caco-2. Metodologia: Os compostos fenólicos da farinha de jatobá foram obtidos por extração sequencial com as soluções de etanol (60%) e acetona (70%). Em seguida, o extrato foi digerido utilizando enzimas (α-amilase, pepsina e pancreatina) em pH fisiológico. Os compostos fenólicos presentes no extrato antes e após a digestão foram identificados por cromatografia líquida de ultra performance - espectrômetro de massas (UPLC-MS/MS). Foi avaliada a capacidade de inibição dos extratos de jatobá digeridos em relação à atividade das enzimas α-amilase e α-glicosidase. Células intestinais Caco-2 foram incubadas com diferentes concentrações (0,05 mg/mL - 0,1 mg/mL) de extratos de farinha de jatobá digeridos em diferentes tempos (30 min, 2h e 12 h) para a avaliação da captação de glicose e da expressão gênica dos transportadores de glicose SGLT1 e GLUT2. Resultados: 44 compostos fenólicos foram identificados, dentre eles, a principal classe presente são os flavonoides. Compostos como o ácido cafeico, o kaempferol, quercetina-3- rutinosideo e a quercetrina estavam presentes no extrato antes da digestão. O conteúdo de compostos fenólicos do extrato foi reduzido após a digestão, entretanto o mesmo ainda apresentou compostos de relevância biológica como o ácido p-cumárico, ácido 3-o-feruloilquinico, theaflavina, crisina e grandinina que já apresentaram efeito positivo sobre o metabolismo da glicose in vitro em outros trabalhos. Os extratos fenólicos de jatobá após a digestão in vitro inibiram significativamente a atividade das enzimas α-amilase (76 e 91%) e α- glicosidase (53 e 77%). Os extratos também demonstraram inibir significativamente tanto a captação de glicose independente de sódio quanto a expressão gênica dos transportadores de glicose SGLT1 e GLUT2 de maneira dose-dependente. Conclusão: Este é o primeiro trabalho que identificou os compostos fenólicos presentes na farinha de jatobá. A partir do exposto, podemos concluir que a farinha de jatobá apresenta potencial benefício a saúde devido ao seu conteúdo de compostos fenólicos e a capacidade destes compostos de regular a digestão e a absorção de carboidratos in vitro

Introduction: Diabetes mellitus (DM) is associated with complications that decrease the quality of life and survival of individuals. In addition, it entails high costs for metabolic control and treatment of its complications, thus being characterized as a public health problem. The regulation of digestion and intestinal absorption of carbohydrates to maintain plasma glucose homeostasis are important strategies for protection in chronic diseases such as type 2 diabetes (DM2), obesity and metabolic syndrome. Phenolic compounds are a complex group of chemical substances present in plants. In vitro and in vivo studies have shown that phenolic compounds are able to inhibit the activity of carbohydrases (α-amylase and α-glycosidase) and the intestinal transport of glucose mediated by SGLT1 and GLUT2 transporters. Brazilian Cerrado present a large biodiversity, but although many species have been identified, its nutritional and functional potential is still little known. Among these native species is the jatobá-docerrado. Jatobá-do-cerrado is a brazilian native legume, whose farinaceous pulp that surrounds its seeds presents significant amounts of phenolic compounds and may have a potential effect on glucose metabolism. Objectives: To verify the effects of phenolic compounds from jatobá-do-cerrado flour in the digestion of carbohydrates and uptake of glucose in Caco-2 intestinal cells. Methods: Phenolic compounds of jatobá flour were obtained by sequential extraction with olutions of ethanol (60%) and acetone (70%). The extract was digested using enzymes (α-amylase, pepsin and pancreatin) at physiological pH. The phenolic compounds present in the extract before and after the digestion were identified by liquid chromatography of ultra-performance - mass spectrometer (UPLCMS / MS). The ability of inhibition of the extracts of jatobá digested in relation to the activity of α-amylase and α-glycosidase enzymes was evaluated. Caco-2 intestinal cells were incubated with different concentrations of jatobá flour extracts (0.1 mg / mL - 0.05 mg / mL) for different time (30 min, 2 h and 12 h) to the evaluation of facilitated uptake (sodium-free buffer) and gene expression of SGLT1 and GLUT2 glucose transporters. Results: 44 phenolic compounds have been identified, among them a major class present are flavonoids. Compounds such as caffeic acid, quercetin-3-rutinoside and quercetrine were present in the extract before in vitro digestion. The content of phenolic compounds of the extract after digestion was reduced. However, the extract presents compounds with biological activity such as p-coumaric acid, 3-o-feruloylquinic acid , theaflavin, chrysin and grandinine, which already presented positive effects on glucose metabolism in vitro in other studies. Phenolic extracts of jatobá after in vitro digestion inhibited the activity of α-amylase (76 and 91%) and α-glycosidase (53 and 77%). The extracts also shown to inhibit both glucose uptake and gene expression of glucose transporters SGLT1 and GLUT2 in a dose-dependent manner. Conclusion: This is the first work that identified the phenolic compounds present in jatobá flour. Thus, we can conclude that the jatobá flour presents potential health benefit by modulate digestion and the absorption of carbohydrates in vitro

Absorption, Physiological/genetics , Caco-2 Cells , Diabetes Mellitus , Fabaceae , Glucose/pharmacology , Phenolic Compounds , Biological Availability , Biological Transport , Digestion , Flour
Mem. Inst. Oswaldo Cruz ; 112(9): 587-592, Sept. 2017. graf
Article in English | LILACS | ID: biblio-894875


BACKGROUND The link between Candida albicans and diabetes mellitus is well-acknowledged, but incompletely elucidated. OBJECTIVES The purpose of this study is to assess the growth rate of C. albicans (CA) in the presence of different concentrations of glucose and fructose, two of the main pathophysiologic and nutritionally relevant sugars in diabetic patients, in order to obtain a better understanding of the nutrient acquisition strategy and its possible relation to the hyperglycemic status of diabetic patients. METHODS The effects of different concentrations of glucose and fructose (1000 mg%, 500 mg%, 250 mg% and 100 mg% w/v) on the growth rate of CA have been studied by flow-cytometry. FINDINGS We found that glucose concentration is directly related to CA growth, which may be linked to the frequent yeast infections that occur in non-controlled diabetic patients; we also show that fructose inhibits CA growth rate. MAIN CONCLUSIONS As a consequence of our hypothesis, the study demonstrates that fructose-containing food may prevent the development of candidiasis, at least in oral sites.

Humans , Candida albicans/growth & development , Candida albicans/drug effects , Diabetes Mellitus/microbiology , Fructose/pharmacology , Glucose/pharmacology , Time Factors , In Vitro Techniques , Flow Cytometry
Rev. bras. enferm ; 70(2): 317-325, Mar.-Apr. 2017. tab
Article in English | LILACS, BDENF | ID: biblio-843639


ABSTRACT Objective: to assess pain in preterm newborns and to compare the neonatal and therapeutic variables with the total scores of the Neonatal Facial Coding System of preterm newborns submitted to arterial puncture exposed to music and 25% oral glucose. Method: a comparative study with 48 recordings of preterm newborns - Group 1, music (26); Group 2, glucose 25% (22) - individually analyzed by three trained nurses, after Kappa of at least 80%. Results: the variables and the pain scores of the groups did not present statistical significance (p < 0.05) according to the Neonatal Facial Coding System. 80.8% of the preterm infants in Group 1 had a higher quantitative score ≥ 3 in the neonatal variables (gender, type of delivery), and therapeutic variables (type of oxygen therapy, place of hospitalization, type of puncture). Conclusion: There was no difference when comparing the music and glucose 25% groups and the variables studied.

RESUMEN Objetivo: evaluar el dolor en recién nacidos prematuros y comparar las variables neonatales y terapéuticas con las puntuaciones totales del Neonatal Facial Coding System de los recién nacidos prematuros sometidos a una punción arterial expuestos a la música y glucosa al 25% por vía oral. Método: estudio comparativo con 48 fi lmaciones de los recién nacidos prematuros divididos en el Grupo 1 - música (26) y el Grupo 2 - glucosa al 25% (22). Las fi lmaciones fueron analizadas individualmente por tres enfermeras capacitadas después de coefi ciente Kappa de al menos 80%. Resultados: las variables y puntuaciones de dolor de los grupos no fueron estadísticamente signifi cativas (p<0,05) de acuerdo con el Neonatal Facial Coding System. En el Grupo 1, 80,8% de los recién nacidos prematuros mostraron mayores cantidades de puntuaciones ≥ 3 en las variables neonatales (sexo, tipo de parto) y las variables terapéuticas (tipo de la terapia de oxígeno, lugar de internación, tipo de punción). Conclusión: No hubo diferencias cuando se comparan los grupos de música y de glucosa al 25% y las variables estudiadas.

RESUMO Objetivo: avaliar a dor em recém-nascidos pré-termo e comparar as variáveis neonatais e terapêuticas com os escores totais da Neonatal Facial Coding System de recém-nascidos pré-termo submetidos à punção arterial exposto à música e glicose 25% oral. Método: estudo comparativo com 48 fi lmagens de recém-nascidos pré-termo - Grupo 1, música (26); Grupo 2, glicose 25% (22) - analisadas individualmente por três enfermeiras treinadas, após Kappa de no mínimo 80%. Resultados: as variáveis e os escores de dor dos grupos não apresentaram signifi cância estatística (p < 0,05) de acordo com o Neonatal Facial Coding System. 80,8% dos prematuros do Grupo 1 apresentaram um maior quantitativo de escores ≥ 3 nas variáveis neonatais (sexo, tipo de parto) e, variáveis terapêuticas (tipo de oxigenoterapia, local de internação, tipo de punção). Conclusão: Não houve diferença ao se comparar os grupos da música e da glicose 25% e as variáveis estudadas.

Humans , Male , Female , Infant, Newborn , Pain Measurement/methods , Needlestick Injuries/complications , Pain Management/standards , Pain/nursing , Acetylglucosamine/therapeutic use , Infant, Premature/psychology , Infant, Premature/blood , Pain Management/methods , Glucose/pharmacology , Music Therapy/methods , Music Therapy/standards