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Article in Chinese | WPRIM | ID: wpr-880766


OBJECTIVE@#To investigate the effect of interleukin (IL) -13 combined with cold stimulation on synthesis and secretion of mucin (MUC) 5AC in human bronchial epithelial cell line 16HBE and explore the role of transient receptor potential 8 (TRPM8) and anti-apoptotic factor B-cell lymphoblast-2 (Bcl-2) in this process.@*METHODS@#16HBE cells were stimulated with 10 ng/mL IL-13, 1 mmol/L menthol, or both (1 mmol/L menthol was added after 6 days of IL-13 stimulation), and the changes in the expression of MUC5AC, intracellular Ca@*RESULTS@#The mRNA and protein expressions of MUC5AC increased significantly in 16HBE cells following stimulation with IL-13, menthol, and both (@*CONCLUSIONS@#Menthol combined with IL-13 produces a synergistic effect to promote the synthesis and secretion of MUC5AC in 16HBE cells possibly by activating TRPM8 receptor to upregulate the expression of Bcl-2.

Bronchi , Epithelial Cells/drug effects , Humans , Interleukin-13 , Menthol/pharmacology , Mucin 5AC
Braz. j. med. biol. res ; 52(11): e8772, 2019. graf
Article in English | LILACS | ID: biblio-1039259


This study aimed to investigate the mechanism of fluorofenidone (AKF-PD) in treating renal interstitial fibrosis in rats with unilateral urinary obstruction (UUO). Thirty-two male Sprague-Dawley rats were randomly divided into sham, UUO, UUO + enalapril, and UUO + AKF-PD groups. All rats, except sham, underwent left urethral obstruction surgery to establish the animal model. Rats were sacrificed 14 days after surgery, and serum was collected for renal function examination. Kidneys were collected to observe pathological changes. Immunohistochemistry was performed to assess collagen I (Col I) protein expression, and terminal deoxynucleotidyl transferase-mediated nick end-labeling staining to observe the apoptosis of renal tubular epithelial cells. The expression of Fas-associated death domain (FADD), apoptotic protease activating factor-1 (Apaf-1), and C/EBP homologous protein (CHOP) proteins was evaluated by immunohistochemistry and western blot analysis. AKF-PD showed no significant effect on renal function in UUO rats. The pathological changes were alleviated significantly after enalapril or AKF-PD treatment, but with no significant differences between the two groups. Col I protein was overexpressed in the UUO group, which was inhibited by both enalapril and AKF-PD. The number of apoptotic renal tubular epithelial cells was much higher in the UUO group, and AKF-PD significantly inhibited epithelial cells apoptosis. The expression of FADD, Apaf-1, and CHOP proteins was significantly upregulated in the UUO group and downregulated by enalapril and AKF-PD. In conclusion, AKF-PD improved renal interstitial fibrosis by inhibiting apoptosis of renal tubular epithelial cells in rats with UUO.

Animals , Male , Pyridones/pharmacology , Ureteral Obstruction/pathology , Apoptosis/drug effects , Epithelial Cells/drug effects , Kidney Diseases/pathology , Pyridones/metabolism , Blood Urea Nitrogen , Fibrosis , Angiotensin-Converting Enzyme Inhibitors/metabolism , Angiotensin-Converting Enzyme Inhibitors/pharmacology , Enalapril/metabolism , Enalapril/pharmacology , Random Allocation , Rats, Sprague-Dawley , Creatinine/blood , Collagen Type I/drug effects , Collagen Type I/metabolism , Disease Models, Animal , Transcription Factor CHOP/drug effects , Apoptotic Protease-Activating Factor 1/drug effects , Apoptotic Protease-Activating Factor 1/metabolism , Fas-Associated Death Domain Protein/drug effects , Fas-Associated Death Domain Protein/metabolism
Bol. latinoam. Caribe plantas med. aromát ; 17(6): 575-582, nov. 2018. ilus
Article in English | LILACS | ID: biblio-1007341


The skin is the largest organ of the human body and its main function is to protect it from the external environment. It is exposed to injuries that require a rapid healing process to recover its functionality. Microorganisms inhabit the skin, which makes up the normal microbial flora, but in situations of injury they can cause infections that slow down the regeneration process. Therefore, there is a great interest in the development of alternative methods to accelerate the regeneration process and prevent infections. In this work, the efficacy of flavonoid 3-O-methylgalangine and the terpenic derivative Filifolinone and its mixtures, isolated from plants of the genus Heliotropium, on the stimulation of cell proliferation was evaluated. The results showed that the mixtures stimulated proliferation and migration in MA104 cells mainly due to the presence of Filifolinone, that together with the known antibacterial activity of 3-O-methylgalangine, opens new alternatives for the use of natural compounds in healing processes.

La piel es el órgano más grande del cuerpo humano y su función principal es protegerla del entorno externo. Está expuesta a lesiones que requieren un proceso de curación rápido para recuperar su funcionalidad. Los microorganismos que habitan en la piel, constituyen la flora microbiana normal, pero en situaciones de lesión pueden causar infecciones que retardan el proceso de regeneración. Por lo tanto, existe un gran interés en el desarrollo de métodos alternativos para acelerar el proceso de regeneración y prevenir infecciones. En este trabajo, se evaluó la eficacia del flavonoide 3-O-metilgalangina y el derivado terpénico Filifolinona y sus mezclas, aisladas de plantas del género Heliotropium, en la estimulación de la proliferación celular. Los resultados mostraron que las mezclas estimularon la proliferación y la migración en las células MA104 debido principalmente a la presencia de Filifolinona, que junto con la actividad antibacteriana conocida de la 3-O-metilgalangina, abre nuevas alternativas para el uso de compuestos naturales en los procesos de curación.

Terpenes/pharmacology , Flavonoids/pharmacology , Heliotropium , Cell Proliferation/drug effects , Terpenes/chemistry , Wound Healing , Flavonoids/chemistry , Cell Movement/drug effects , Cell Survival/drug effects , Cells, Cultured , Epithelial Cells/drug effects
Int. j. morphol ; 36(1): 345-357, Mar. 2018. tab, graf
Article in English | LILACS | ID: biblio-893233


SUMMARY: An alternative superovulator to replace clomiphene citrate is needed as clomiphene citrate is associated with low pregnancy rates. Anastrozole is an effective superovulator, but it has not been well researched. In order to determine the effectiveness of anastrozole as a superovulator and to compare it with clomiphene citrate in similar situations, this study ascertained the effects of these drugs on the expression of the focal adhesion proteins, vinculin and integrin β5, which are uterine receptivity markers, in the uterine epithelial cells of day 1 and day 6 pregnant Wistar rats. The results show that vinculin and integrin β5 are co-localized at the base of the uterine epithelium at day 1 of pregnancy whereas at day 6, they disassemble from the basal focal adhesions and co-localize and significantly increase their expression apically (p≤0.0001). Moreover, there is a significant difference in the protein expression levels of vinculin and integrin b5 in uterine luminal epithelial cells between untreated (control) and chlomiphene citrate treated rats (p≤0.0001), anastrozole and chlomiphene citrate treated rats at day 6 (p≤0.0001) suggesting the interpretation that anastrozole seems to enhance their expression in order to perhaps assist in the implantation process of the blastocyst. The immunofluorescence experiments agree with the vinculin and integrin β5 gene expression findings in which at day 6 of pregnancy, vinculin and integrin β5 gene expression are significantly upregulated in uterine luminal epithelial cells in the anastrozole treated group relative to the calibrator sample (p≤0.0001). These findings suggest that anastrozole is implantation friendly.

RESUMEN: Es necesario un superovulador alternativo para reemplazar el citrato de clomifeno, debido a que está asociado con bajas tasas de preñez. El anastrozol es un superovulador eficaz, sin embargo es poca su investigación. Con el fin de determinar la efectividad del anastrozol como superovulador y compararlo con citrato de clomifeno en situaciones similares, se determinaron los efectos de estos fármacos sobre la expresión de las proteínas de adhesión focal, vinculina e integrina β5, en marcadores de receptividad uterina en días 1 y 6, en las células epiteliales uterinas de ratas Wistar preñadas. Los resultados muestran que la vinculina y la integrina β5 se co-localizan en la base del epitelio uterino al día 1 de la gravidez mientras que al día 6 se desmontan de las adherencias focales basales, co-localizan y aumentan significativamente su expresión apicalmente (p≤0.0001). Además, existe una diferencia significativa en los niveles de expresión de proteína de vinculina e integrina β5 en células epiteliales luminales uterinas entre ratas no tratadas (control) y tratadas con citrato declomifeno (p≤0.0001), ratas tratadas con anastrozol y citrato declomifeno al día 6 (p≤0,0001) sugiriendo la interpretación de que el anastrozol parece mejorar su expresión con el fin de ayudar en el proceso de implantación del blastocisto. Los experimentos de inmunofluorescencia coinciden con los resultados de la expresión de los genes vinculina e integrina β5 en los cuales al día 6 de la preñez, la vinculina y la integrina β5 están significativamente reguladas en células epiteliales luminales uterinas en el grupo tratado con anastrozol con respecto a la muestra del calibrador (p<0,0001). Estos hallazgos sugieren que el anastrozol es favorable para la implantación.

Animals , Female , Pregnancy , Rats , Integrins/drug effects , Nitriles/pharmacology , Triazoles/pharmacology , Uterus/drug effects , Vinculin/drug effects , Epithelial Cells/drug effects , Focal Adhesions/drug effects , Integrins/genetics , Integrins/physiology , Microscopy, Confocal , Microscopy, Fluorescence , Rats, Wistar , Real-Time Polymerase Chain Reaction , Vinculin/genetics , Vinculin/physiology
Braz. oral res. (Online) ; 32: e004, 2018. tab, graf
Article in English | LILACS | ID: biblio-889501


Abstract Radiation combined injury, a life-threatening condition, has higher mortality than simple radiation injury. The aim of the present study was to analyze the efficiency of Aloe vera and silver nanoparticles in improving the healing of ulcerated oral mucosa after irradiation. Thirty male Albino mice were divided into five groups: control, radiation, Aloe vera (AV), silver nanoparticles (NS), and AV+NS. The mice were exposed to whole body 6Gy gamma-radiation. After one hour, 20% acetic acid was injected into the submucosal layer of the lower lip for ulcer induction. The animals received topical treatment with the assigned substances for 5 days. Lip specimens were subjected to hematoxylin and eosin and anti alpha-smooth muscle actin immunohistochemical staining. Results demonstrated occurance of ulcer three days post irradiation in all groups except in the AV+NS group where only epithelial detachment was developed. After seven days, data revealed persistent ulcer in radiation group, and almost normal epithelium in the AV+NS group. A significant reduction of epithelial thickness was detected in all groups at the third day as compared to control. At the seventh day, only the AV+NS group restored the epithelial thickness. Area percent of alpha-smooth muscle actin expression was significantly decreased in radiation group at the third day followed by significant increase at the seventh day. However, all treatment groups showed significant increase in alpha-smooth muscle actin at the third day, which decreased to normal level at the seventh day. Our study demonstrated the efficiency of Aloe vera and silver nanoparticles in enhancing ulcer healing after irradiation.

Animals , Male , Mice , Aloe/chemistry , Gamma Rays/adverse effects , Metal Nanoparticles/therapeutic use , Oral Ulcer/drug therapy , Oral Ulcer/etiology , Radiation Injuries, Experimental/drug therapy , Silver/therapeutic use , Acetic Acid , Actins/analysis , Administration, Topical , Epithelial Cells/drug effects , Epithelial Cells/radiation effects , Fibroblasts/drug effects , Immunohistochemistry , Microscopy, Electron, Transmission , Oral Ulcer/pathology , Radiation Injuries, Experimental/pathology , Reference Values , Reproducibility of Results , Time Factors , Treatment Outcome , Wound Healing/drug effects
J. appl. oral sci ; 26: e20160608, 2018. graf
Article in English | LILACS, BBO | ID: biblio-954490


Abstract Objective Relacin is a synthetic molecule that targets RelA, an essential protein in a conserved bacterial stress response system. It was shown to inhibit bacterial growth. The aims of this study were to evaluate the antimicrobial effect of relacin combined with sodium hypochlorite (NaOCl) on Enterococcus faecalis biofilms and to evaluate the cytotoxicity of relacin. Material and Methods 48-h E. faecalis OG1RF biofilms were treated by various concentrations of relacin in order to determine its inhibitory concentration. Then, the 48-h biofilms were treated either with 1-min NaOCl (0.01%, 0.05%) alone, or in combination of relacin. As a means of comparison, the biofilms of ΔrelA were also treated by 1-min NaOCl (0.01%, 0.05%, 0.25%). The treatment efficacy was determined by agar plate count assays. The cytotoxicity of relacin was examined on human gingival epithelial cells Ca9-22 and murine fibroblasts NIH-3T3 by a methyl thiazolyltetrazolium (MTT) assay and a lactate dehydrogenase assay. Statistical analysis was performed by one-way or two-way analysis of variance (ANOVA) with Bonferroni's post-hoc test and an independent Student's t-test. A significance level of p<0.05 was used. Results Relacin inhibited the growth of OG1RF biofilms partially at 8 mM and fully at 14 mM. The relacin (14 mM) and NaOCl combined treatment resulted in significantly higher treatment efficacy than NaOCl treatment alone. At 0.05% NaOCl, the combined treatment resulted in 5.65 (±0.19) log reduction in biofilm viability. The ΔrelA biofilms were more susceptible to NaOCl treatment than the wild type biofilms at 0.25% NaOCl. Relacin at 14 mM was not toxic to host epithelial cells and fibroblasts. Conclusions The combination of relacin with a low concentration of NaOCl was effective and not cytotoxic.

Humans , Animals , Sodium Hypochlorite/pharmacology , Enterococcus faecalis/drug effects , Biofilms/drug effects , Deoxyguanosine/analogs & derivatives , Dipeptides/pharmacology , Anti-Bacterial Agents/pharmacology , Tetrazolium Salts , Time Factors , Colony Count, Microbial , Microbial Sensitivity Tests , Reproducibility of Results , Analysis of Variance , Enterococcus faecalis/physiology , Biofilms/growth & development , NIH 3T3 Cells/drug effects , Deoxyguanosine/pharmacology , Epithelial Cells/drug effects , Formazans , Gingiva/cytology
Braz. j. med. biol. res ; 51(2): e6611, 2018. graf
Article in English | LILACS | ID: biblio-889029


Ginsenoside Rg1, one of the most notable active components of Panax ginseng, has been widely reported to exert anti-inflammatory actions. This study aimed to reveal whether ginsenoside Rg1 also exhibits beneficial roles against lipopolysaccharide (LPS)-induced apoptosis and inflammation in human renal tubular epithelial cells, and to evaluate the potential role of the component on tubulointerstitial nephritis treatment. HK-2 cells were treated with various doses of ginsenoside Rg1 (0, 50, 100, 150, and 200 μM) in the absence or presence of 5 μg/mL LPS. Thereafter, CCK-8 assay, flow cytometry, western blot, migration assay, reactive oxygen species (ROS) assay, and ELISA were carried out to respectively assess cell viability, apoptosis, migration, ROS activity, and the release of inflammatory cytokines. As a result, ginsenoside Rg1 protected HK-2 cells from LPS-induced injury, as cell viability was increased, cell apoptosis was decreased, and the release of MCP-1, IL-1β, IL-6, and TNF-α was reduced. Ginsenoside Rg1 functioned to HK-2 cells in a dose-dependent manner, and the 150 μM dose exhibited the most protective functions. Ginsenoside Rg1 had no significant impact on cell migration and ROS activity, while it alleviated LPS-induced ROS release and migration impairment. Furthermore, the down-regulations of p-PI3K, p-AKT, and up-regulations of PTEN, p-IκBα, p-p65, Bcl-3 induced by LPS were recovered to some extent after ginsenoside Rg1 treatment. In conclusion, ginsenoside Rg1 protects HK-2 cells against LPS-induced inflammation and apoptosis via activation of the PI3K/AKT pathway and suppression of NF-κB pathway.

Humans , Lipopolysaccharides , Apoptosis/drug effects , Ginsenosides/pharmacology , Epithelial Cells/drug effects , Kidney Tubules/cytology , Anti-Inflammatory Agents/pharmacology , Enzyme-Linked Immunosorbent Assay , Cell Line , Cell Survival/drug effects , Blotting, Western , Reproducibility of Results , Analysis of Variance , Cytokines/analysis , Cytokines/drug effects , Cell Migration Assays
Biol. Res ; 49: 1-9, 2016. ilus, graf
Article in English | LILACS | ID: biblio-950863


BACKGROUND: Several evidences indicate that hormones and neuropeptides function as immunomodulators. Among these, growth hormone (GH) is known to act on the thymic microenvironment, supporting its role in thymocyte differentiation. The aim of this study was to evaluate the effect of GH on human thymocytes and thymic epithelial cells (TEC) in the presence of laminin. RESULTS: GH increased thymocyte adhesion on BSA-coated and further on laminin-coated surfaces. The number of migrating cells in laminin-coated membrane was higher in GH-treated thymocyte group. In both results, VLA-6 expression on thymocytes was constant. Also, treatment with GH enhanced laminin production by TEC after 24 h in culture. However, VLA-6 integrin expression on TEC remained unchanged. Finally, TEC/thymocyte co-culture model demonstrated that GH elevated absolute number of double-negative (CD4-CD8-) and single-positive CD4+ and CD8+ thymocytes. A decrease in cell number was noted in double-positive (CD4+CD8+) thymocytes. CONCLUSIONS: The results of this study demonstrate that GH is capable of enhancing the migratory capacity of human thymocytes in the presence of laminin and promotes modulation of thymocyte subsets after co-culture with TEC.

Humans , Infant, Newborn , Infant , Child, Preschool , Child , Thymus Gland/cytology , Growth Hormone/pharmacology , Laminin/biosynthesis , Epithelial Cells/drug effects , Thymocytes/drug effects , Reference Values , Thymus Gland/metabolism , Time Factors , Immunohistochemistry , CD4-Positive T-Lymphocytes , Cell Adhesion/drug effects , Cell Differentiation/drug effects , Cell Movement/drug effects , Cells, Cultured , Analysis of Variance , Laminin/drug effects , CD8-Positive T-Lymphocytes , Coculture Techniques , Integrin alpha6beta1/analysis , Integrin alpha6beta1/metabolism , Flow Cytometry/methods
Braz. oral res. (Online) ; 30(1): e122, 2016. graf
Article in English | LILACS | ID: biblio-951982


Abstract Osteonecrosis of the jaw is an adverse effect of bisphosphonates. While the etiopathogenesis of this condition has been investigated, the interactions and effects of bisphosphonates on oral mucosa cells remain unclear. It is hypothesized that cell culture models, such as co-culture or three-dimensional cell culture models, can provide valuable insight. Therefore, the aim of this study was to evaluate the effects of zoledronic acid (ZA) on epithelial cells and gingival fibroblasts in a co-culture model. Briefly, epithelial cells were seeded on transwell inserts and gingival fibroblasts were seeded in the lower well of 24-well plates. The latter were treated with ZA (5 μM) for 24 or 48 h. Cell viability and synthesis of the inflammatory chemokine, CCL2, were subsequently assessed. Data were subjected to statistical analysis with a 5% significance level. In the presence of ZA, the epithelial cells exhibited significant toxicity in both cell culture models and at both time points. However, greater cytotoxicity was observed in the co-culture model. Greater viability for the gingival fibroblasts was also associated with the co-culture model, and ZA-mediated toxicity was observed for the 48 h time point. ZA promoted a significant increase in CCL2 synthesis in both sets of cells, with greater CCL2 synthesis detected in the gingival fibroblasts. However, this effect was diminished in the co-culture model. Taken together, these results confirm the specific response patterns of the cells seeded in the co-culture model and also demonstrate the protective mechanism that is mediated by epithelial/mesenchymal cell interactions upon exposure to ZA.

Humans , Cell Culture Techniques/methods , Diphosphonates/pharmacology , Epithelial Cells/drug effects , Bone Density Conservation Agents/pharmacology , Fibroblasts/drug effects , Imidazoles/pharmacology , Time Factors , Enzyme-Linked Immunosorbent Assay , Cell Survival/drug effects , Cells, Cultured , Reproducibility of Results , Analysis of Variance , Statistics, Nonparametric , Coculture Techniques , Cell Proliferation/drug effects , Zoledronic Acid , Gingiva/cytology
Article in English | WPRIM | ID: wpr-220495


BACKGROUND/AIMS: We investigated whether angiotensin III (Ang III) is involved in monocyte recruitment through regulation of the chemokine monocyte chemoattractant protein-1 (MCP-1) in cultured human proximal tubular epithelial cells (HK-2 cells). METHODS: We measured MCP-1 levels in HK-2 cells that had been treated with various concentrations of Ang III and Ang II type-1 (AT1) receptor antagonists at various time points. The phosphorylation states of p38, c-Jun N-terminal kinases (JNK), and extracellular-signal-regulated kinases were measured in Ang III-treated cells to explore the mitogen-activated protein kinase (MAPK) pathway. MCP-1 levels in HK-2 cell-conditioned media were measured after pre-treatment with the transcription factor inhibitors curcumin or pyrrolidine dithiocarbamate. RESULTS: Ang III increased MCP-1 protein production in dose- and time-dependent manners in HK-2 cells, which was inhibited by the AT1 receptor blocker losartan. p38 MAPK activity increased significantly in HK-2 cells exposed to Ang III for 30 minutes, and was sustained at higher levels after 60 minutes (p < 0.05). Total phosphorylated JNK protein levels tended to increase 20 minutes after stimulation with Ang III. Pre-treatment with a p38 inhibitor, a JNK inhibitor, or curcumin significantly inhibited Ang III-induced MCP-1 production. CONCLUSIONS: Ang III increases MCP-1 synthesis via stimulation of intracellular p38 and JNK MAPK signaling activity and subsequent activated protein-1 transcriptional activity in HK-2 cells.

Angiotensin II Type 1 Receptor Blockers/pharmacology , Angiotensin III/pharmacology , Cell Line , Chemokine CCL2/metabolism , Dose-Response Relationship, Drug , Epithelial Cells/drug effects , Humans , JNK Mitogen-Activated Protein Kinases/antagonists & inhibitors , Kidney Tubules, Proximal/drug effects , Phosphorylation , Protein Kinase Inhibitors/pharmacology , Signal Transduction/drug effects , Time Factors , Transcription Factor AP-1/metabolism , Up-Regulation , p38 Mitogen-Activated Protein Kinases/antagonists & inhibitors
Acta cir. bras ; 30(9): 617-623, Sep. 2015. tab, ilus
Article in English | LILACS | ID: lil-761499


PURPOSE:To investigate the effect of metformin on renal tubular epithelial cell apoptosis and inflammation after kidney ischemia/ reperfusion in rats.METHODS:Eighteen SD rats were randomly divided into three groups: Sham (S), Ischemia/reperfusion (I/R), and Metformin (E). Before establishing the I/R model, group E was administered metformin for three days, while groups S and I/R were administered equal volumes of saline. After three days, a right nephrectomy was performed on all groups, after which the left kidneys of groups E and I/R rats were subjected to 45 min renal ischemia. Renal function, histology, and cell apoptosis were assessed. AMPK, pAMPK, COX-2, and Caspase 3 were also detected.RESULTS:Compared to I/R group, Caspase 3 and COX-2 levels were decreased in group E. COX-2, Caspase3 and pAMPK levels were higher in groups E and I/R than in group S. The pAMPK level of group E was higher than that of I/R group, while COX-2 and caspase 3 were lower in group E than they were in the other groups. There was no significant difference between E and I/R groups in AMPK levels.CONCLUSION:Metformin preconditioning attenuated the inflammation caused by ischemia/reperfusion and inhibited the apoptosis of renal tubular epithelial cells.

Animals , Male , Apoptosis/drug effects , Epithelial Cells/drug effects , Ischemic Preconditioning/methods , Kidney/blood supply , Kidney/drug effects , Metformin/pharmacology , Reperfusion Injury/prevention & control , AMP-Activated Protein Kinases/analysis , Blood Urea Nitrogen , Blotting, Western , /analysis , Creatinine/blood , /analysis , Immunohistochemistry , Kidney/pathology , Random Allocation , Rats, Sprague-Dawley , Reproducibility of Results , Time Factors
Rev. bras. epidemiol ; 18(1): 234-247, Jan-Mar/2015. tab
Article in Portuguese | LILACS | ID: lil-736431


OBJETIVO: Estimar a prevalência de dor crônica e sua associação com a situação socioeconômica, demográfica e atividade física no lazer em idosos. MÉTODOS: Este estudo é parte do inquérito epidemiológico e transversal de base populacional e domiciliar EpiFloripa Idoso 2009-2010 realizado com 1.705 idosos (≥ 60 anos), residentes em Florianópolis, Santa Catarina. A partir da resposta afirmativa de dor crônica, foram investigadas as associações com as variáveis obtidas por meio de entrevista estruturada. Realizou-se a estatística descritiva, incluindo cálculos de proporções e intervalos de confiança 95% (IC95%). Na análise bruta e ajustada, empregou-se regressão de Poisson, estimando-se as razões de prevalência, com intervalos de confiança de 95% e valores p ≤ 0,05. RESULTADOS: Dentre os idosos investigados, 29,3% (IC95% 26,5 - 32,2) relataram dor crônica. Na análise ajustada, observou-se que as variáveis sexo feminino, menor escolaridade e pior situação econômica ficaram associadas significativamente com maior prevalência de dor crônica; ser fisicamente ativo no lazer ficou associado significativamente com menor prevalência do desfecho. CONCLUSÕES: Percebe-se que a dor crônica é um agravo que acomete considerável parcela de idosos, havendo desigualdades sociais na sua frequência e sendo beneficamente afetada pela atividade física no lazer. É necessário que políticas públicas de saúde subsidiem programas multidisciplinares de controle da dor incluindo a prática regular de atividade física, voltada especificamente à promoção da saúde do idoso, evitando assim que a dor crônica comprometa a qualidade de vida desta população. .

OBJECTIVE: To estimate the prevalence of chronic pain and its association with socioeconomic and demographic status, and leisure physical activity in the elderly population. METHODS: This study is part of an epidemiological cross-sectional population-based household survey called EpiFloripa Elderly 2009-2010, which was conducted with 1,705 elderly individuals (≥ 60 years) residents of Florianópolis, Santa Catarina. From the positive response to chronic pain, the associations with the variables were investigated through a structured interview. Descriptive statistics were conducted, including ratio calculation and 95% confidence intervals. In crude and adjusted analysis, Poisson regression was utilized, estimating prevalence ratios, with 95% confidence intervals and ≤ 0.05 p-values. RESULTS: Among the subjects, 29.3% (IC95% 26.5 - 32.2) reported chronic pain. Adjusted analysis showed that being female, having less years of schooling, and being in worse economic situation were significantly associated with a higher prevalence of chronic pain. Being physically active during leisure time was significantly associated with lower prevalence of the outcome. CONCLUSIONS: Therefore, it is clear that chronic pain affects a considerable amount of elderly individuals. Social inequalities are a harmful influence in these individuals' quality of life, inasmuch as those inequalities increase the frequency with which chronic pain afflicts them. At the same time, physical activity during leisure time decreases chronic pain frequency. It is fundamental that public health policies subsidize multidisciplinary pain management programs, which should include health targeted physical activity for the elderly, thus preventing the decrease in quality of life that chronic pain brings to this population. .

Animals , Humans , Early Growth Response Protein 1/genetics , Epithelial Cells/drug effects , Mitogen-Activated Protein Kinase 1/metabolism , /metabolism , Sulindac/analogs & derivatives , Apoptosis/drug effects , Blotting, Western , Butadienes/pharmacology , Cell Line , Cell Survival/drug effects , Dose-Response Relationship, Drug , Early Growth Response Protein 1/metabolism , Epithelial Cells/cytology , Epithelial Cells/metabolism , Imidazoles/pharmacology , Intestines/cytology , Intestines/drug effects , Intestines/metabolism , Luciferases/genetics , Luciferases/metabolism , Microscopy, Confocal , Mitogen-Activated Protein Kinase 1/antagonists & inhibitors , /antagonists & inhibitors , Nitriles/pharmacology , Pyridines/pharmacology , Reverse Transcriptase Polymerase Chain Reaction , RNA, Messenger/genetics , RNA, Messenger/metabolism , Signal Transduction/drug effects , Sulindac/pharmacology , Transfection , Up-Regulation/drug effects , ets-Domain Protein Elk-1/genetics , ets-Domain Protein Elk-1/metabolism
Arq. bras. oftalmol ; 78(1): 1-5, Jan-Feb/2015. tab, graf
Article in English | LILACS | ID: lil-741170


Purpose: To determine the efficacy of tranilast as an adjunctive therapy in conjunctival autograft. Methods: Twenty-nine patients were randomly allocated to the Tranilast Group (n=15) or the Control Group (n=14). The Tranilast Group received a subconjunctival injection of 0.5% tranilast 30 days prior to surgery. Conjunctival autograft was performed in both groups using fibrin sealant and 0.02% subconjunctival mitomycin C at the end of the surgery. After the resection of the pterygium, immunohistochemistry was performed with 100 cells to identify epithelial cells positive for transforming growth factor-β (TGF-β). Subjective symptoms were evaluated using a 5-point scale, and the recurrence rate was assessed. Results: Both groups showed improvements in their symptoms and similar clinical results. Compared with the Control Group, the Tranilast Group failed to show a decreased recurrence rate (p=0.59). However, the number of epithelial cells expressing TGF-β was lower in the Tranilast Group (5 cells; 95% CI: 2.56-13.15; Control Group, 16 cells, 95% CI: 11.53-24.76; p=0.01). Minimal but reversible complications, including glaucoma secondary to corticosteroids and granuloma, occurred during the study. Conclusion: Tranilast was effective in decreasing the number of pterygium epithelial cells expressing TGF-β. .

Objetivo: Determinar a eficácia do tranilast, como terapia auxiliar no transplante autólogo de conjuntiva. Métodos: Vinte e nove pacientes foram randomizados em dois grupos: Grupo Tratado (15) e Grupo Controle (14). Trinta dias antes da cirurgia, o Grupo Tratado recebeu uma injeção subconjuntival de tranilast a 0,5%. O transplante autólogo de conjuntiva foi realizado em ambos os grupos, usando-se a cola de fibrina e a mitomicina 0,02% subconjuntival, ao final da cirurgia. Cada paciente foi examinado por 12 meses de acompanhamento. A imuno-histoquímica foi realizada, mediante um total de 100 células, a fim de que se contassem as células epiteliais positivas, para o fator de crescimento transformador beta (TGF-β), após a cirurgia do pterígio. Os sintomas subjetivos foram avaliados usando-se uma escala de cinco pontos, e a taxa de recorrência foi avaliada. Resultados: Os 2 grupos apresentaram melhora dos sintomas e com resultados clínicos similares. Quando comparado com o Grupo Controle, o Grupo Tratado falhou em mostrar uma diminuição da taxa de recorrência (p=0,59). Entretanto o número de células epiteliais expressando o TGF-β foi menor no Grupo Tratado (5 células; 95% CI=2,56-13,15; Grupo Controle, 16 células; 95% CI: 11,53-24,76, p=0,01). Complicações mínimas, mas reversíveis, ocorreram durante o estudo, incluindo glaucoma secundário ao uso de corticoide e granuloma. Conclusão: O tranilast foi efetivo em diminuir o número células epiteliais do pterígio expressando o TGF-β. .

Adult , Female , Humans , Male , Middle Aged , Conjunctiva/transplantation , Epithelial Cells/drug effects , Pterygium/drug therapy , Pterygium/surgery , Transforming Growth Factor beta/metabolism , ortho-Aminobenzoates/administration & dosage , Autografts , Conjunctiva/drug effects , Conjunctiva/metabolism , Epithelial Cells/metabolism , Follow-Up Studies , Fibrin Tissue Adhesive/therapeutic use , Injections, Intraocular , Mitomycin/therapeutic use , Postoperative Period , Preoperative Care , Prospective Studies , Pterygium/metabolism , Pterygium/prevention & control , Recurrence , Secondary Prevention/methods , Transplantation, Autologous , Treatment Outcome
Salud pública Méx ; 57(1): 50-57, ene.-feb. 2015. ilus, tab
Article in English | LILACS | ID: lil-736461


Objective. To determine the effect of pH, and exposure time over the inactivation of aflatoxin B1 (AFB1) during the tortilla making process as well as the degradative molecules generated. Materials and methods. Inactivation of AFB1 in maize-dough with alkaline pH and in alkaline methanolic solutions was determined by HPLC. Kinetics of time exposure of AFB1 in methanolic solution and the degradative products were analyzed by direct injection electrospray mass spectometry (DIESI-MS). Results. The alkaline pH of the maize-dough after nixtamalización between 10.2, and 30-40 minutes of resting at room temperature allows the 100% reduction of AFB1. DIESI-MS analysis of the extracts indicated the presence of two degradation molecules from AFB1. Conclusion. The alkaline pH of maize-dough and resting time are the principal factors involved in diminishing AFB1 levels in tortillas. A procedure to the tortilla making process is proposed, which allows the reduction of remnant AFB1, avoiding the accumulative effect over consumers.

Objetivo. Determinar el efecto del pH alcalino de la masa de maíz y el tiempo de exposición sobre la aflatoxina B1 (AFB1) durante la producción de tortillas e identificar los posibles productos de degradación mediante DIESI-MS. Material y métodos. La inactivación de la AFB1 a pH alcalino y diferentes tiempos de exposición en masa nixtamalizada y en soluciones metanólicas fueron determinadas por HPLC. La cinética de degradación de AFB1, y los productos de degradación en soluciones metanólicas se determinaron por DIESI-MS. Resultados. El pH alcalino de la masa y 30 a 40 minutos de reposo redujeron en 100% la AFB1 adicionada. Se identificaron dos moléculas de degradación. Conclusión. Los principales factores involucrados en la disminución de la AFB1 durante la producción de tortillas son la hidrólisis alcalina y el tiempo de reposo. Se propone un procedimiento para la producción de tortilla que reducirá la AFB1 residual evitando el efecto acumulativo en los consumidores.

Humans , Male , Antineoplastic Agents/pharmacology , /genetics , Epithelial Cells/physiology , Gene Expression Regulation , PPAR delta/physiology , PPAR gamma/physiology , Sulindac/analogs & derivatives , Cell Line , Epithelial Cells/drug effects , Gene Expression Regulation/drug effects , Prostate/cytology , Prostate/physiology , Sulindac/pharmacology
J. appl. oral sci ; 23(1): 49-55, Jan-Feb/2015. tab, graf
Article in English | LILACS, BBO | ID: lil-741590


Objective Enamel matrix derivative (EMD) is used clinically to promote periodontal tissue regeneration. However, the effects of EMD on gingival epithelial cells during regeneration of periodontal tissues are unclear. In this in vitro study, we purified ameloblastin from EMD and investigated its biological effects on epithelial cells. Material and Methods Bioactive fractions were purified from EMD by reversed-phase high-performance liquid chromatography using hydrophobic support with a C18 column. The mouse gingival epithelial cell line GE-1 and human oral squamous cell carcinoma line SCC-25 were treated with purified EMD fraction, and cell survival was assessed with a WST-1 assay. To identify the proteins in bioactive fractions of EMD, we used proteome analysis with two-dimensional gel electrophoresis followed by identification with liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. Results Purified fractions from EMD suppressed proliferation of GE-1 and SCC-25. LC-MS/MS revealed that ameloblastin in EMD is the component responsible for inhibiting epithelial cell proliferation. The inhibitory effect of ameloblastin on the proliferation of GE-1 and SCC-25 was confirmed using recombinant protein. Conclusion The inhibitory effects of EMD on epithelial cell proliferation are caused by the biological activities of ameloblastin, which suggests that ameloblastin is involved in regulating epithelial downgrowth in periodontal tissues. .

Humans , Animals , Mice , Dental Enamel Proteins/pharmacology , Epithelial Cells/drug effects , Periodontium/drug effects , Cell Proliferation/drug effects , Cell Survival/drug effects , Cells, Cultured , Chromatography, High Pressure Liquid , Electrophoresis, Gel, Two-Dimensional , Epithelial Cells/cytology , Gingiva/cytology , Gingiva/drug effects , Guided Tissue Regeneration, Periodontal/methods , Periodontitis/drug therapy , Reference Values , Reproducibility of Results , Silver Staining , Time Factors
Braz. oral res. (Online) ; 29(1): 1-7, 2015. tab, ilus
Article in English | LILACS | ID: lil-777227


Dental bleaching has become one of the most frequently requested esthetic treatments in dental offices. Despite the high clinical success observed with this procedure, some adverse effects have been reported, including a potential for developing premalignant lesions, root resorption and tooth sensitivity, especially when misused. The aim of this study was to evaluate the genotoxic response using a micronucleus (MN) assay, after the application of two concentrations of carbamide peroxide. Thirty-seven patients were divided into two groups and randomly received either a 10% carbamide peroxide (CP) (19) or a 16% carbamide peroxide (18) concentration for 21 days in individual dental trays. Gingival margin cells were collected immediately before the first use (baseline), and then 15 and 45 days after baseline. The cells were placed on a histological slide, stained by the Feulgen technique, and evaluated by an experienced blinded examiner. One thousand cells per slide were counted, and the MN rate was determined. The two groups were analyzed by the Wilcoxon rank-sum test and the Kruskal-Wallis equality-of-populations rank test. A slight increase in MN was observed for both groups, in comparison with the baseline, at 15 days. However, no difference was observed between the two groups (10% and 16%), at either 15 or 45 days (p = 0.90). When bleaching is not prolonged or not performed very frequently, bleaching agents containing carbamide peroxide alone will not cause mutagenic stress on gingival epithelial cells.

Adult , Female , Humans , Male , Young Adult , Gingiva/drug effects , Peroxides/adverse effects , Tooth Bleaching/adverse effects , Urea/analogs & derivatives , Epithelial Cells/drug effects , Micronucleus Tests , Mouth Mucosa/drug effects , Peroxides/administration & dosage , Random Allocation , Statistics, Nonparametric , Time Factors , Treatment Outcome , Tooth Bleaching/methods , Urea/administration & dosage , Urea/adverse effects
Article in English | WPRIM | ID: wpr-56488


This study investigated the toxicity of commercial non-steroid anti-inflammatory drug (NSAID) eye solutions against corneal epithelial cells in vitro. The biologic effects of 1/100-, 1/50-, and 1/10-diluted bromfenac sodium, pranoprofen, diclofenac sodium, and the fluorometholone on corneal epithelial cells were evaluated after 1-, 4-, 12-, and 24-hr of exposure compared to corneal epithelial cell treated with balanced salt solution as control. Cellular metabolic activity, cellular damage, and morphology were assessed. Corneal epithelial cell migration was quantified by the scratch-wound assay. Compared to bromfenac and pranoprofen, the cellular metabolic activity of diclofenac and fluorometholone significantly decreased after 12-hr exposure, which was maintained for 24-hr compared to control. Especially, at 1/10-diluted eye solution for 24-hr exposure, the LDH titers of fluorometholone and diclofenac sodium markedly increased more than those of bromfenac and pranoprofen. In diclofenac sodium, the Na+ concentration was lower and amount of preservatives was higher than other NSAIDs eye solutions tested. However, the K+ and Cl- concentration, pH, and osmolarity were similar for all NSAIDs eye solutions. Bromfenac and pranoprofen significantly promoted cell migration, and restored wound gap after 48-hr exposure, compared with that of diclofenac or fluorometholone. At 1/50-diluted eye solution for 48-hr exposure, the corneal epithelial cellular morphology of diclofenac and fluorometholone induced more damage than that of bromfenac or pranoprofen. Overall, the corneal epithelial cells in bromfenac and pranoprofen NSAID eye solutions are less damaged compared to those in diclofenac, included fluorometholone as steroid eye solution.

Anti-Inflammatory Agents, Non-Steroidal/administration & dosage , Benzophenones/administration & dosage , Benzopyrans/administration & dosage , Bromobenzenes/administration & dosage , Cell Movement/drug effects , Cells, Cultured , Diclofenac/administration & dosage , Epithelial Cells/drug effects , Epithelium, Corneal/cytology , Fluorometholone/administration & dosage , Humans , L-Lactate Dehydrogenase/metabolism , Microscopy, Electron, Transmission , Ophthalmic Solutions , Propionates/administration & dosage
Rev. cuba. invest. bioméd ; 33(2): 150-160, abr.-jun. 2014. Ilus, tab
Article in Spanish | LILACS | ID: lil-735327


OBJETIVO: detectar la sobreexpresión del receptor de factor de crecimiento epidérmico en células epiteliales de lesiones premalignas de la mucosa bucal, marcadas magnéticamente por relaxometría. MÉTODOS: las células exfoliadas de mucosa oral de individuos sanos y enfermos se marcaron con el sistema: IgG anti-EGF-R biotinilada/IgG anti-biotina conjugada con partículas superparamagnéticas y se midieron los tiempos de relajación T1 y T2. RESULTADOS: disminuyeron los tiempos de relajación (T1 y T2) de las células marcadas respecto a las no marcadas, en todas las muestras analizadas. Al comparar los valores de T1 y T2 de las células marcadas de la lesión con los valores de las células sanas, se encontró una disminución estadísticamente significativas del tiempo de relajación. Al comparar los tiempos de relajación de células marcadas sanas con los de las células de las diferentes lesiones encontramos diferencias estadísticamente significativas para los casos de células de leucoplasias y liquen plano tanto en T1 como T2; no así con células de queratosis. CONCLUSIONES: los resultados muestran que es posible detectar por relaxometría células que expresen el receptor de factor de crecimiento epidérmico, utilizando el sistema conjugado empleado y que el EGF-R se sobreexpresa en células de lesiones como leucoplasia y liquen plano.

OBJECTIVE: Detect the overexpression of the epidermal growth factor receptor in epithelial cells of premalignant lesions of the oral mucosa magnetically marked by relaxometry. METHODS: Exfoliated oral mucosa cells from healthy and sick individuals were marked with the system biotinylated anti-EGF-R IgG / anti-biotin IgG conjugated with supermagnetic particles and measurements were taken of relaxation times T1 and T2. RESULTS: In all the samples analyzed there was a decrease in the relaxation times (T1 and T2) of marked cells with respect to unmarked cells. Comparison of the T1 and T2 values of marked cells from the lesion with the values of healthy cells revealed a statistically significant decrease in relaxation time. Comparison of the relaxation times of healthy marked cells with those of cells from the various lesions revealed statistically significant differences in both T1 and T2 in cells from lichen planus and leukoplakias, but not in cells from keratoses. CONCLUSIONS: Results show that relaxometry may be used to detect cells expressing the epidermal growth factor receptor, using the conjugated system described herein, and that EGF-R is overexpressed in cells from lesions such as leukoplakia and lichen planus.

Humans , Magnetic Resonance Spectroscopy/methods , Epidermal Growth Factor/therapeutic use , Epithelial Cells/drug effects , Mouth/pathology , Informed Consent
Invest. clín ; 55(1): 15-22, mar. 2014. ilus
Article in Spanish | LILACS | ID: lil-746281


El metotrexate (MTX) es uno de los medicamentos frecuentemente utilizados en el cáncer infantil señalándose además, como agente citotóxico de la mucosa bucal, que puede desencadenar el proceso inflamatorio e incremento de la vascularidad en los tejidos epiteliales durante las fases iniciales de la mucositis oral. El presente trabajo tiene como objetivo determinar la producción de citocinas proinflamatorias IL-1b, IL-6 y TNF-a en cultivos de células epiteliales tratadas con MTX. Se realizaron cultivos de células epiteliales de laringe humana obtenidas de la línea celular Hep-2, con diferentes dosis de MTX en distintos tiempos de incubación, y a su vez se analizó la citotoxicidad del fármaco mediante el ensayo colorimétrico, el cual se basa en la reducción metabólica del bromuro de 3-(4,5- dimetiltiazol-2-ilo)-2,5-difeniltetrazol (MTT), y la producción de citocinas proinflamatorias mediante el ensayo inmuno enzimático indirecto (ELISA). En cuanto a los resultados se observó, que los cultivos de células Hep-2 presentaron aumento en la producción de las citocinas proinflamatorias a las 72 horas al utilizar las dosis de 0.32µM MTX. Estos resultados sugieren que la dosis y el tiempo de exposición del MTX alteran la fisiología de las células epiteliales humanas, lo cual podrían desempeñar un papel importante durante las fases de iniciación y de desarrollo de la mucositis oral.

Methotrexate (MTX), a drug commonly used in childhood cancer, has also been indicated as a cytotoxic agent of the oral mucosa, which can trigger the inflammatory process and increase the vascularity of epithelial tissues during the early stages of oral mucositis. The aim of this study was to determine the production of proinflammatory cytokines IL-1b, IL-6 y TNF-a in epithelial cell cultures treated with MTX. Epithelial cells of human larynx, obtained from the cell line Hep-2, were cultured with different doses of MTX during different incubation times. The drug cytotoxicity was analyzed by means of the colorimetric test, which is based on the metabolic reduction of the bromide of 3-(4, 5-dimetiltiazol-2-ilo)-2,5-difeniltetrazol (MTT); and the proinflammatory cytokines production by the test enzyme-linked immunosorbent assay (ELISA). Cultures of HEp-2 cells showed increased production of proinflammatory cytokines at 72 hours with 0.32µM of MTX. These results suggest that depending on the dose and exposure time, MTX alters the physiology of human epithelial cells, which may play an important role during the phases of initiation and development of oral mucositis.

Humans , Antimetabolites, Antineoplastic/pharmacology , Epithelial Cells/drug effects , Interleukin-1beta/biosynthesis , /biosynthesis , Methotrexate/pharmacology , Tumor Necrosis Factor-alpha/biosynthesis , Antimetabolites, Antineoplastic/adverse effects , Cell Line, Tumor , Cell Survival , Carcinoma/pathology , Enzyme-Linked Immunosorbent Assay , Epithelial Cells/metabolism , Inflammation , Interleukin-1beta/genetics , /genetics , Laryngeal Neoplasms/pathology , Methotrexate/adverse effects , Stomatitis/chemically induced , Tetrazolium Salts , Thiazoles , Tumor Necrosis Factor-alpha/genetics