RESUMO
Herein, we investigated hydrogels composed of boronic-acid-functionalized alginate and blended with polyvinyl alcohol (PVA) of different molecular weights to control the release of metoclopramide hydrochloride as a function of pH and shear stress. The functionalization of alginate introduced dynamic covalent bonding and pH-responsive properties that can modulate network connectivity. The study investigated the viscoelastic properties of the hydrogels, their drug release profiles, and their responsiveness to changes in pH and shear forces. The results showed that a higher PVA molecular weight and alkaline pH conditions increased hydrogel viscosity and stiffness due to a more stable and interconnected network structure than acidic pH. Metoclopramide release revealed that the hydrogels exhibited pH-responsive drug release behavior. The drug was more readily released under acidic conditions due to the instability of sp2-hybridized boronate ester bonds. The influence of shear forces on the release of metoclopramide was also investigated at shear rates of 1, 10, and 100 s-1, revealing their effect on matrix stiffening. Research shows that AlgBA/PVA hydrogels have unique properties, such as dynamic covalent bonding, that make them sensitive to external mechanical forces. This sensitivity makes them ideal for applications where physiological conditions trigger drug release.
RESUMO
The impact of high-intensity ultrasound (HIU, 20 kHz) on the physicochemical and functional characteristics of gourd seed protein isolate (GoSPI) was studied. GoSPI was prepared from oil-free gourd seed flour through alkaline extraction (pH 11) and subsequent isoelectric precipitation (pH 4). The crude protein concentration of GoSPI ranged from 91.56 ± 0.17 % to 95.43 ± 0.18 %. Aqueous suspensions of GoSPI (1:3.5 w/v) were ultrasonicated at powers of 200, 400, and 600 W for 15 and 30 min. Glutelins (76.18 ± 0.15 %) were the major protein fraction in GoSPI. HIU decreased the moisture, ash, ether extract, and nitrogen-free extract contents and the hue angle, available water and a* and b* color parameters of the GoSPI in some treatments. The L* color parameter increased (7.70 %) after ultrasonication. HIU reduced the bulk density (52.63 %) and particle diameter (39.45 %), as confirmed by scanning electron microscopy, indicating that ultrasonication dissociated macromolecular aggregates in GoSPI. These structural changes enhanced the oil retention capacity and foam stability by up to 62.60 and 6.84 %, respectively, while the increases in the solvability, water retention capacity, and emulsifying activity index of GoSPI were 90.10, 19.80, and 43.34 %, respectively. The gelation, foaming capacity, and stability index of the emulsion showed no improvement due to HIU. HIU altered the secondary structure of GoSPI by decreasing the content of α-helices (49.66 %) and increasing the content of ß-sheets (52.00 %) and ß-turns (65.00 %). The electrophoretic profile of the GoSPI was not changed by HIU. The ultrasonicated GoSPI had greater functional attributes than those of the control GoSPI and could therefore be used as a functional food component.
RESUMO
The obtained seeds from fruit processing are considered by-products containing proteins that could be utilized as ingredients in food manufacturing. However, in the specific case of soursop seeds, their usage for the preparation of protein isolates is limited. In this investigation a protein isolate from soursop seeds (SSPI) was obtained by alkaline extraction and isoelectric precipitation methods. The SSPI was sonicated at 200, 400 and 600 W during 15 and 30 min and its effect on the physicochemical, functional, biochemical, and structural properties was evaluated. Ultrasound increased (p < 0.05) up to 5 % protein content, 261 % protein solubility, 60.7 % foaming capacity, 30.2 % foaming stability, 86 % emulsifying activity index, 4.1 % emulsifying stability index, 85.4 % in vitro protein digestibility, 423.4 % albumin content, 83 % total sulfhydryl content, 316 % free sulfhydryl content, 236 % α-helix, 46 % ß-sheet, and 43 % ß-turn of SSPI, in comparison with the control treatment without ultrasound. Furthermore, ultrasound decreased (p < 0.05) up to 50 % particle size, 37 % molecular flexibility, 68 % surface hydrophobicity, 41 % intrinsic florescence spectrum, and 60 % random coil content. Scanning electron microscopy analysis revealed smooth structures of the SSPI with molecular weights ranging from 12 kDa to 65 kDa. The increase of albumins content in the SSPI by ultrasound was highly correlated (r = 0.962; p < 0.01) with the protein solubility. Improving the physicochemical, functional, biochemical and structural properties of SSPI by ultrasound could contribute to its utilization as ingredient in food industry.
Assuntos
Annona , Proteínas de Plantas , Sementes , Solubilidade , Sementes/química , Proteínas de Plantas/química , Proteínas de Plantas/isolamento & purificação , Annona/química , Ondas Ultrassônicas , Fenômenos Químicos , SonicaçãoRESUMO
BACKGROUND: ICD-11 Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD) are stress-related disorders. The International Trauma Questionnaire (ITQ) is a widely used instrument to assess PTSD and CPTSD. To date, there is no evidence of the psychometric characteristics of the ITQ in Latin American countries. OBJECTIVE: The aim of this study was to assess the construct and concurrent validity of the Latin American Spanish adaptation of the ITQ in a sample of Chilean adults. METHODS: A sample of 275 Chilean young adults completed the ITQ, a traumatic life events checklist, the Adverse Childhood Experiences Questionnaire, the Depression Anxiety Stress Scales-21, and the Columbia-Suicide Severity Rating Scale short version. Four alternative confirmatory factor analysis models were tested. Correlation analyses were performed to determine concurrent validity with associated measures (number of reported traumatic events, number of adverse childhood experiences, anxiety, depression, and suicidal risk). RESULTS: The second-order two-factor (PTSD and DSO) and the correlated first-order six-factor model provided acceptable fit; however, the first model showed a better fit based on the BIC difference. The PTSD and DSO dimensions, as well as the six ITQ clusters showed positive correlations with reported number of traumatic life-events, reported number of adverse childhood experiences, levels of anxiety, depression, and suicidal risk. CONCLUSIONS: The ITQ Latin American Spanish adaptation provides acceptable psychometric evidence to assess PTSD and CPTSD in accordance with the ICD-11.
This study is an initial validation of the Latin American Spanish adaptation of the ITQ with a Chilean young adults sample.The latent structure of the Latin American Spanish ITQ was better supported by a two-factor second-order model (PTSD/DSO); a six-factor correlated model was also acceptable.The six ITQ symptom clusters, as well as the PTSD/CPTSD dimensions were significantly positively correlated with three criterion variables: anxiety, depression, and suicidal risk.The number of potentially traumatic experiences, as well as number of exposure to adverse childhood experiences, was significantly associated with PTSD/CPTSD symptoms.
Assuntos
Transtornos de Estresse Pós-Traumáticos , Adulto Jovem , Humanos , Chile , Transtornos de Estresse Pós-Traumáticos/diagnóstico , Transtornos de Estresse Pós-Traumáticos/epidemiologia , Inquéritos e Questionários , Ansiedade/diagnóstico , Transtornos de AnsiedadeRESUMO
A series of six polybenzylic dendrons with an alkynyl focal point were synthesized for their incorporation to gold nanoparticles. Five of these compounds showed columnar mesomorphism in a wide range of temperatures. These dendrons were reacted with gold nanoparticles stabilized with a combination of a dodecanethiol and 11-azidoundecane-1-thiol. The azido group of the last compound allowed the functionalization of the nanoparticles with the six polybenzylic dendrons by 1,3-dipolar cycloaddition between their alkynyl groups and the terminal azido groups of the thiols. A high efficiency of the cycloaddition process (47-69%) was confirmed by several experimental techniques and no decomposition or aggregation phenomena were detected in the dendron-coated nanoparticles. The involved mechanism and the resulting percentage composition of the final materials are discussed. The results of the ulterior growth of the nanoparticles by thermal treatment are influenced by the size and the shape of the dendron and the temperature of the process. The structures of the final nanoparticles were investigated by TEM, DSC, TGA, NMR and UV-Vis spectroscopy. These nanoparticles do not show liquid crystal properties. However, a melting process between a crystalline and a fluid phase is observed. In the solid phase, the nanomaterials prepared show a short-range interaction between nanoparticles with a 2D local hexagonal order. A near-field effect was observed in the UV-vis spectra by coupling of different surface plasmon resonance bands (SPR) probably due to the short-range interactions. The main novelty of this work lies in the scarcity of previous studies of gold nanoparticles coated with dendrons forming themselves columnar mesophases. Most of the studies reported in the literature deal with gold nanoparticles coated with calamitic mesogens. Additionally, the effect of the thermal treatment, which in a previous paper was shown to increase the mean size of the nanoparticles without increasing their size polydispersity, has been studied in these materials.
RESUMO
Psychotic experiences (PEs) are prevalent in the general population, particularly in adolescents. PEs are associated with various negative outcomes such as psychotic, depressive, anxiety and post-traumatic stress disorders and suicidal behavior. Recent studies in the general population have suggested that what makes PEs relevant is not so much the experiences per se, but their association with non-psychotic comorbidity and other transdiagnostic domains. Thus, there is a need for a better understanding of how PEs exist in a larger psychopathological context in adolescents. In the present study we aimed to explore this, using latent profile analysis (LPA) to identify different patterns in which PEs, psychiatric symptoms and psychological processes co-occur. LPA was conducted using data from an adolescent general population subsample (n = 335) with PEs. We conducted LPA, using measures of PEs, psychiatric symptoms and behaviors (depression, anxiety post-traumatic stress disorder and suicidal behavior) and cognitive and affective processes of entrapment/defeat and emotional regulation as manifest variables. We found that the best fit was obtained with a four-class solution that distinguished primarily between different levels of overall severity: "low symptomatology" (19.1%), "mild-moderate symptomatology" (39.4%), "moderate symptomatology" (33.7%); "high symptomatology" (7.8%). Levels of depression, post-traumatic stress symptoms and defeat/entrapment were most differentiated between classes. The high symptomatology group showed the highest scores in all psychiatric symptoms suicidal ideation, and emotional/cognitive domains, except in cognitive reappraisal. This group also showed the highest usage of emotional suppression. Our results suggest that the assessment of mental health risk in adolescents should be aware that PEs exist in a broad context of other domains of psychopathology and transdiagnostic cognitive and affective processes.
RESUMO
OBJECTIVE: To determine predictors of BCR in patients with localized PCa undergoing RP at an oncology reference center in Colombia. MATERIALS AND METHODS: A retrospective analytical study was conducted on patients with localized PCa undergoing RP and who at least had one adverse pathological factor for BCR. We consider BCR as two consecutive elevations of PSA after RP, greater than 0.2 ng/ml. For the bivariate analysis we used Kaplan-Meier, and Cox proportional risk analysis to estimate the hazard ratio as well as to determine variables independently associated with the outcome. RESULTS: 280 patients were included. The medianage was 65.3 years, with a median follow up of 52.2 months. BCR occurred in 39% of patients, with a median BCR time of 24.8 months. In the multivariate analysis, high risk [HR 2.07 (95% CI 1.11 - 3.86)], positive surgical margins [HR 2.79 (95% CI 1.66 - 4.69)] and tertiary Gleason pattern [HR 2.16 (95% CI 1.16 - 4.01)] were identified as independent variables associated significantly with BCR. Limitations include retrospective design and sample size. CONCLUSIONS: High risk, positive surgical margins and the presence of tertiary Gleason pattern are the predictive factors of BCR after RP in the Colombian population.
OBJETIVO: Determinar los predictores de recaída bioquímica en pacientes con cáncer de próstata localizado llevados a prostatectomía radical en un centro oncológico de referencia en Colombia.MATERIALES Y MÉTODOS: Se realizó un estudio retrospectivo analítico en pacientes con cáncer de próstata localizado que fueron llevados a prostatectomía radical y que tuvieran al menos un factor patológico adverso para recaída bioquímica. Las variables analizadas fueron la edad, el riesgo, el estadio pT, el estadio pN, la densidad ganglionar, los márgenes quirúrgicos, el grupo grado de Gleason y el patrón terciario del Gleason. Consideramos recaída bioquímica como 2 elevaciones consecutivas del PSA después de la prostatectomía radical, mayor a 0,2 ng/ml. Para el análisis bivariado usamos Kaplan-Meier y el análisis de riesgo proporcional de Cox para estimar el HR así como para determinarlas variables independientemente asociadas con el desenlace. RESULTADOS: Se incluyeron 280 pacientes. La edad promedio fue de 65,3 años, con una media de seguimiento de 52,2 meses. La recaída bioquímica ocurrió en el 39% de los pacientes, con una media de tiempo hasta la recaída bioquímica de 24,8 meses. En el análisis multivariado, el riesgo alto [HR 2,07 (IC95% 1,11 3,86)], los márgenes quirúrgicos positivos [HR 2,79 (IC95% 1,66 4,69)] y el patrón terciario del Gleason [HR 2,16 (IC 95% 1,16 4,01)] fueron identificados como variables independientes asociadas significativamente con recaída bioquímica. Las limitaciones incluyen el diseño retrospectivo del estudio y el tamaño de la muestra. CONCLUSIONES: El riesgo alto, los márgenes quirúrgicos positivos y la presencia de patrón terciario de Gleason son las variables predictoras de recaída bioquímica después de prostatectomía radical en la población colombiana.
Assuntos
Antígeno Prostático Específico , Neoplasias da Próstata , Colômbia , Humanos , Masculino , Gradação de Tumores , Recidiva Local de Neoplasia/epidemiologia , Prostatectomia , Neoplasias da Próstata/cirurgia , Estudos RetrospectivosRESUMO
RESUMEN Objetivo: Describir las características clínicas prenatales y post natales de los neonatos hijos de madres con la Covid-19, y seguimiento hasta los 14 días post alta. Material y métodos: Estudio tipo observacional, serie de casos, censal de los neonatos nacidos en el Hospital Guillermo Almenara Irigoyen, hijos de madres con la Covid-19, que nacieron durante la cuarentena decretada por el gobierno peruano. Los neonatos se dividieron en 2 grupos: con la prueba PCR nasofaríngea positiva o no y se observó si alguna de estas características estuvieron asociadas con la presentación de esta prueba positiva. Resultados: Hubieron 201 gestantes con diagnóstico de Covid-19 por prueba rápida y que tuvieron 206 neonatos. De ellos, 4 neonatos tuvieron la PCR nasofaríngea positiva y 202, negativa. La edad materna fue menor en el grupo con la prueba positiva, pero no hubo diferencia respecto al tipo de parto: césarea, fueron a termino, con adecuado peso al nacer y ningún sexo predominó. Doscientos cinco (99,51%) neonatos salieron de alta en la primera semana de vida; 181 (90,05%) neonatos con PCR nasofaríngea negativa y los 4 neonatos con prueba positiva fueron seguidos por 2 semanas; ninguno presentó síntomas y el tipo de lactancia fue mixta. Conclusiones: Los neonatos hijos de madres con la Covid-19, tendrían una mínima posibilidad de contraer esta enfermedad. Y su desarrollo prenatal y post natal no se vería afectado, a pesar de incluso tener la prueba PCR nasofaríngea positiva.
SUMMARY Objective: To describe prenatal and post-natal clinical features of neonates born from mothers with COVID-19 including 14-day follow-up post discharge. Methods: Case series of neonates attended at Hospital Guillermo Almenara born from mothers infected with COVID-19 during the lockdown implemented by the Peruvian government. Neonates were divided in two groups based on positivity of the nasopharyngeal PCR test. Results: 201 pregnant women with COVID-19 diagnosed by rapid tests who delivered 206 neonates were identified; 4 of these neonates had positive nasopharyngeal PCR tests. Pregnants infected with COVID-19 were younger than non-infected, but no differences were observed in route of delivery, sex of the newborn and body weight at birth. Two hundred and five neonates were discharged one week after birth ;181 neonates with negative nasopharyngeal negative PCR tests and 4 neonates with a positive PCR test were followed for 14 days, none presented symptoms and received mixed lactation. Conclusions: Neonates born from mother infected with COVID-19 had minimal risk of getting the infection and their pre and post-natal development will not be affected despite of having a positive PCR test.
RESUMO
Highly sensitive magnetometry reveals paramagnetism in dendrimer-coated gold nanoparticles. Different types of such nanoparticles, as a result of (i) functionalizing with two distinct Percec-type dendrons, linked to gold via dodecanethiol groups, and (ii) postsynthesis annealing in a solvent-free environment that further promotes their growth have been prepared. Ultimately, for each of the two functionalization configurations, we obtain highly monodisperse and stable nanoparticles of two different sizes, with spherical shape. These characteristics allow singling out the source of the measured paramagnetic signals as exclusively arising from the undercoordinated gold atoms on the surfaces of the nanoparticles. Bulk gold and the functional groups of the ligands contribute only diamagnetically.
RESUMO
The ability to perform movements is vital for our daily life. Our actions are embedded in a complex environment where we need to deal efficiently in the face of unforeseen events. Neural oscillations play an important role in basic sensorimotor processes related to the execution and preparation of movements. In this review, I will describe the state of the art regarding the role of motor gamma oscillations in the control of movements. Experimental evidence from electrophysiological studies has shown that motor gamma oscillations accomplish a range of functions in motor control beyond merely signaling the execution of movements. However, these additional aspects associated with motor gamma oscillation remain to be fully clarified. Future work on different spatial, temporal and spectral scales is required to further understand the implications of gamma oscillations in motor control.
RESUMO
Abstract Background: Coccidiosis is the infectious disease with the greatest economic impact in poultry production. Additionally, chemotherapeutic growth promoters are being substituted for safer alternative strategies. Objective: To evaluate the effect of feeding oleoresins from chili pepper (Capsicum annuum) and turmeric (Curcuma longa L.) on the performance, survival rate, and the Productive Efficiency Index of broilers from 1 to 21d challenged by Eimeria sp. Methods: A total of 700 male 1-day-old chicks (Cobb 500) challenged with Eimeria sp, were assigned to a completely randomized design with four treatments: (1) negative control diet, without anticoccidial agent or growth promoters; (2) control diet+0.05% salinomycin; (3) negative control diet+100g/ton; and (4) negative control diet +140g/ton of test product (Curcuma longa L. plus Capsicum annuum oleoresins). Results: Body weight, weight gain, feed conversion and Productive Efficiency Index did not differ between broilers fed anticoccidial chemotherapeutics and oleoresins. In addition, there was no difference in feed intake and survival rate between dietary treatments. Conclusion: Broilers supplemented with chili pepper and turmeric oleoresins from 1 to 21d present similar body weight, weight gain, feed conversion, and Productive Efficiency Index compared to broilers supplemented with chemotherapeutic anticoccidials without affecting feed intake or survival rate.
Resumen Antecedentes: El impacto económico generado por la coccidiosis en el sector avícola es el mayor en relación con otras enfermedades. Adicionalmente, los promotores de crecimiento quimioterapéuticos se han venido reemplazando por estrategias alternativas. Objetivo: Evaluar el efecto de oleorresinas de pimiento (Capsicum annuum) y cúrcuma (Curcuma longa L.) sobre el desempeño zootécnico, tasa de supervivencia y el Índice de Eficiencia Productiva en pollos de engorde de 1 a 21 dias desafiados con Eimeria sp. Métodos: Se utilizaron 700 pollos machos (Cobb500) de 1 día de edad, distribuidos en un diseño completamente al azar con cuatro tratamientos: (1) dieta control negativo sin agentes anticoccidianos ni promotores de crecimiento; (2) dieta control+0,05% de salinomicina; (3) dieta control negativa+100g/ton; y (4) dieta control negativa +140g/ton del producto a evaluar (oleorresina de Curcuma longa L. y Capsicum annuum). Resultados: Se obtuvieron resultados similares repecto a peso corporal, ganancia de peso, conversión alimenticia e Índice de Eficiencia Productiva en los tratamientos que contenían anticoccidiano quimioterapéutico y los que contenian oleorresinas. Además, no se observaron diferencias en el consumo de alimento ni en la tasa de supervivencia entre los tratamientos dietarios. Conclusión: Los pollos de engorde suplementados entre 1 y 21 d con oleorresinas de pimiento y cúrcuma presentan similar peso corporal, ganancia de peso, conversión alimenticia e Índice de Eficiencia Productiva en comparación con los suplementados con anticoccidianos quimioterapéuticos, sin afectar el consumo de alimento ni la viabilidad.
Resumo Antecedentes: O impacto econômico da coccidiose é o maior quando comparado a outras doenças na produção avícola. Além disso, promotores de crescimento quimioterápicos tem sido substituídos por estratégias alternativas. Objetivo: Avaliar o efeito das oleoresinas da pimenta Chilli (Capsicum annuum) e açafrão-da-terra (Curcuma longa L.) no desempenho zootécnico, taxa de sobrevivência e Índice de Eficiência Produtiva de frangos de corte de 1 a 21d desafiados por Eimeria sp Métodos: Foram utilizados 700 pintos de 1d, machos (Cobb500) distribuídos em delineamento inteiramente casualizado, em quatro tratamentos: (1) dieta controle negativo, sem agente anticoccidiano ou promotores de crescimento; (2) dieta controle+0,05% de salinomicina; (3) dieta controle negativa+100g/ton; e (4)+140g/ton de produto teste (oleoresina de Curcuma longa L. mais Capsicum annuum) e desafiados por Eimeria sp. Resultados: Houve resultados similares para peso, ganho de peso, conversão alimentar e Índice de Eficiência Produtiva entre frangos alimentados com dietas contendo anticocidiano quimioterápico e dietas contendo oleoresinas. Além disso, não houve diferença para consumo de ração e a taxa de sobrevivência entre os tratamentos dietéticos. Conclusão: Frangos de corte alimentados com dietas suplementadas com oleorresinas de pimenta chili e açafrão-da-terra apresentaram resultados similares para peso, ganho de peso, conversão alimentar e Índice de Eficiência Produtiva que frangos de corte alimentados com dietas suplementadas com anticoccidianos quimioterápicos de 1 a 21d, sem afetar o consumo de ração e a taxa de sobrevivência dos animais.
RESUMO
The objective of this study was to investigate the impacts of high-intensity ultrasound treatments on the compositional, physicochemical, biochemical, functional and structural properties of canola protein isolates (CPI). Aqueous canola protein suspensions were sonicated at 40â¯kHz for 15â¯min and 30â¯min. The moisture content, water activity, bulk density and the L* and a* color parameters of the CPI decreased due to the ultrasound; however, the in vitro protein digestibility was not modified by the treatment. Glutelin (57.18%) was the main protein fraction in the canola protein isolate. SDS-PAGE demonstrated that there were no changes in the protein electrophoretic patterns, thus indicating that sonication did not break the covalent bonds. However, the ultrasound treatment improved the protein solubility, oil absorption capacity and the emulsifying, gelation and foaming properties, but these improvements depended on the pH and ultrasound exposure time. Scanning electron microscopy revealed that the ultrasound treatment disrupted the microstructure of the CPI by exhibiting larger aggregates as a lyophilized powder. In addition, there was an increase in the surface hydrophobicity and a decrease in the size of the particles of the canola protein due to the ultrasound effects, which indicates a destruction of the particles or a dissociation of the protein aggregates in the canola protein dispersions. These results suggest that ultrasound treatment is a valuable tool for improving the characteristics of canola proteins for use in foods.
Assuntos
Brassica napus/química , Fenômenos Químicos , Proteínas de Plantas/isolamento & purificação , Ondas Ultrassônicas , Cor , Eletroforese em Gel de Poliacrilamida , Emulsões , Tecnologia de Alimentos , Interações Hidrofóbicas e Hidrofílicas , Microscopia Eletrônica de Varredura , Peso Molecular , Tamanho da Partícula , Proteínas de Plantas/metabolismo , Solubilidade , Sonicação , Água/análiseRESUMO
Introducción El síndrome metabólico es una condición muy prevalente en nuestra sociedad, y durante las últimas dos décadas la prevalencia ha aumentado significativamente convirtiéndose en un problema con una carga en salud importante. El cáncer de próstata por su parte es la primera causa de cáncer en hombres en el mundo. Numerosos estudios han sugerido una asociación entre la presencia de síndrome metabólico y el diagnóstico de cáncer de próstata. La información acerca de la asociación Del cáncer de próstata y obesidad es controversial. Nuestro objetivo es determinar si existe una relación entre la presencia de obesidad y el diagnóstico de cáncer de próstata en adultos mayores de la ciudad de Bogotá. Objetivos y Métodos Se analizaron los datos del estudio Salud, Bienestar y Envejecimiento (SABE) Bogotá 2012. Se utilizó como variable dependiente el autorreporte de examen de próstata en los 2 últimos años y se evaluó con respecto a variables antropométricas así como factores sociodemográficos por medio de un análisis multivariado. Resultados La prevalencia de cáncer de próstata fue de 3,15%. El 31.9% de los hombres tienen un IMC mayor de 30. Se encontró una asociación significativa entre el IMC y el diagnóstico de cáncer de próstata (p = 0.005), Enfermedad coronaria y cáncer de próstata (p = 0.03) y nivel de escolaridad y diagnóstico de Cáncer de próstata (p = 0.012). Conclusión Nuestro estudio demuestra que existe una asociación significativa entre estas dos entidades en una población bogotana de adultos mayores. Es necesario realizar más estudios que aporten mayor información acerca de esta asociación.
Introduction Metabolic syndrome is a very prevalent condition in our society, and during the last two decades the prevalence has increased remarkably becoming a problem with a significant health burden. Prostate cancer, on the other side, is the leading cause of cancer in men around the world. Several studies have suggested an association between the presence of metabolic syndrome and the diagnosis of prostate cancer. The information about the association of prostate cancer and obesity is controversial. Our objective is to determine if there is a relationship between the presence of obesity and the diagnosis of prostate cancer in older adults in the city of Bogotá. Objective and Methods Data from the Health, Wellbeing and Aging study (SABE) Bogotá 2012 were analyzed. Self-report of prostate exam in the last 2 years was used as a dependent variable and was evaluated with respect to anthropometric variables as well as sociodemographic factors through a multivariate analysis. Results The prevalence of prostate cancer was 3.15%. 31.9% of men have a BMI greater than 30. A significant association was found between BMI and the diagnosis of prostate cancer (p = 0.005), coronary disease and prostate cancer (p = 0.03) and level of education and diagnosis of prostate cancer (p = 0.012). Conclusion Our study shows that there is a significant association between these two entities in a Bogota population of older adults. It is necessary to carry out more studies that provide more information about this association.
Assuntos
Humanos , Masculino , Próstata , Neoplasias da Próstata , Obesidade , Envelhecimento , Análise Multivariada , Doença das Coronárias , Síndrome Metabólica , Fatores Sociodemográficos , NeoplasiasRESUMO
Several studies have shown that a single exposure to stress may improve or impair learning and memory processes, depending on the timing in which the stress event occurs with relation to the acquisition phase. However, to date there is no information about the molecular changes that occur at the synapse during the stress-induced memory modification and after a recovery period. In particular, there are no studies that have evaluated-at the same time-the temporality of stress and stress recovery period in hippocampal short-term memory and the effects on dendritic spine morphology, along with variations in N-methyl-D-aspartate (NMDA) and α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor subunits. The aim of our study was to take a multidimensional approach to investigate concomitant behavioral, morphological and molecular changes induced by a single restraint stress exposure (2.5 h) and a recovery period of 6 and 24 h in rats. We found that acute stress elicited a reduced preference to explore an object placed in a novel position (a hippocampal-dependent task). These changes were accompanied by increased activity of LIM kinase I (LIMK; an actin-remodeling protein) and increased levels of NR2A subunits of NMDA receptors. After 6 h of recovery from stress, rats showed similar preference to explore an object placed in a novel or familiar position, but density of immature spines increased in secondary CA1 apical dendrites, along with a transient rise in GluA2 AMPA receptor subunits. After 24 h of recovery from stress, the animals showed a preference to explore an object placed in a novel position, which was accompanied by a normalization of NMDA and AMPA receptor subunits to control values. Our data suggest that acute stress produces reversible molecular and behavioral changes 24 h after stress, allowing a full reestablishment of hippocampal-related memory. Further studies need to be conducted to deepen our understanding of these changes and their reciprocal interactions.Adaptive stress responses are a promising avenue to develop interventions aiming at restoring hippocampal function impaired by repetitive stress exposure.
RESUMO
El síndrome de Cushing (SC) endógeno se caracteriza por la sobreproducción crónica de cortisol y está asociado con aumento en la morbimortalidad. Presenta un conjunto de manifestaciones clínicas que pueden variar dependiendo del nivel de cortisol de cada paciente, siendo los signos más característicos de esta enfermedad la obesidad central con debilidad muscular proximal, hematomas, estrías violáceas mayores de 1 cm e hipertensión arterial.1,2 En niños la presentación clínica es diferente, siendo el aumento de peso y el retardo del crecimiento lo más frecuente.1 Se ha visto involucrado en el 2 al 3% los casos de pacientes con síndrome metabólico, principalmente diabetes mellitus e hipertensión arterial, que presentan pobre respuesta al tratamiento farmacológico
Endogenous Cushing syndrome (CS) is characterized by chronic overproduction of cortisol and is associated with increased morbidity and mortality. It presents a set of clinical manifestations that may vary depending on the level of cortisol in each patient, the most characteristic signs of this disease being central obesity with proximal muscle weakness, hematomas, purplish striae greater than 1 cm and arterial hypertension.1,2 In children the clinical presentation is different, with weight gain and growth retardation being the most frequent.1 Cases of patients with cortisol have been involved in 2 to 3%. metabolic syndrome, mainly diabetes mellitus and hypertension, which have a poor response to diabetes. pharmacological treatment
Assuntos
Humanos , Síndrome de Cushing , Gravidez , Laparoscopia , Adenoma AdrenocorticalRESUMO
Chronic stress promotes cognitive impairment and dendritic spine loss in hippocampal neurons. In this animal model of depression, spine loss probably involves a weakening of the interaction between pre- and postsynaptic cell adhesion molecules, such as N-cadherin, followed by disruption of the cytoskeleton. N-cadherin, in concert with catenin, stabilizes the cytoskeleton through Rho-family GTPases. Via their effector LIM kinase (LIMK), RhoA and ras-related C3 botulinum toxin substrate 1 (RAC) GTPases phosphorylate and inhibit cofilin, an actin-depolymerizing molecule, favoring spine growth. Additionally, RhoA, through Rho kinase (ROCK), inactivates myosin phosphatase through phosphorylation of the myosin-binding subunit (MYPT1), producing actomyosin contraction and probable spine loss. Some micro-RNAs negatively control the translation of specific mRNAs involved in Rho GTPase signaling. For example, miR-138 indirectly activates RhoA, and miR-134 reduces LIMK1 levels, resulting in spine shrinkage; in contrast, miR-132 activates RAC1, promoting spine formation. We evaluated whether N-cadherin/ß-catenin and Rho signaling is sensitive to chronic restraint stress. Stressed rats exhibit anhedonia, impaired associative learning, and immobility in the forced swim test and reduction in N-cadherin levels but not ß-catenin in the hippocampus. We observed a reduction in spine number in the apical dendrites of CA1 pyramidal neurons, with no effect on the levels of miR-132 or miR-134. Although the stress did not modify the RAC-LIMK-cofilin signaling pathway, we observed increased phospho-MYPT1 levels, probably mediated by RhoA-ROCK activation. Furthermore, chronic stress raises the levels of miR-138 in accordance with the observed activation of the RhoA-ROCK pathway. Our findings suggest that a dysregulation of RhoA-ROCK activity by chronic stress could potentially underlie spine loss in hippocampal neurons.
Assuntos
Caderinas/metabolismo , Espinhas Dendríticas/metabolismo , Depressão/patologia , Hipocampo/patologia , Neurônios/ultraestrutura , Quinases Associadas a rho/metabolismo , Animais , Aprendizagem da Esquiva , Peso Corporal/fisiologia , Depressão/etiologia , Modelos Animais de Doenças , Masculino , MicroRNAs/genética , MicroRNAs/metabolismo , Neurônios/patologia , Ratos , Ratos Sprague-Dawley , Estatísticas não Paramétricas , Estresse Fisiológico , Sacarose/metabolismo , Edulcorantes/metabolismo , Natação/psicologia , beta Catenina/genética , beta Catenina/metabolismoRESUMO
The aim of the present study was to produce fish silage by lactic acid fermentation and evaluate its use in feeding of quails (Coturnix coturnix japonica). An oven-dried mixture of fish silage and soybean meal (1:1 w/w) was used to prepare the diets with different levels of inclusion (0, 10, 20 and 30%) and evaluate its effect on the performance and meat quality of 160 quails. The inclusion level did not affect the growth and feed conversion ratio. The carcass yield (70.3%) and sensory quality of breast meat were not significantly different among the treatments (p>0.05). However, the concentration of unsaturated fatty acids such as oleic (C18:1n9C), linoleic (C18:2n6C), linolenic (C18:3n3), arachidonic (C20:4n6), cis eicosapentaenoic (C20:5n3) and cis docosahexaenoic (C22:6n3) increased in quail breast meat with the inclusion of fish silage:soybean mixture in the diet (p<0.05). Fish silage and its use in quail diets could offer a good alternative for fish waste utilization as feedstuff component for the improvement of fatty acid composition in its breast meat.
RESUMO
BACKGROUND: The protein isolate obtained from safflower meal by aqueous extraction and ultrafiltration was evaluated for its physicochemical and functional properties. RESULTS: Protein, ash and moisture contents of the safflower protein isolate were 901, 51 and 45 g kg(-1) respectively. Its water and oil absorption capacities were 2.22 mL H(2) O g(-1) protein and 2.77 mL oil g(-1) protein respectively. Least gelation concentration was 20 g kg(-1) at pH 2, 6, 8 and 10 but 100 g kg(-1) at pH 4. Emulsifying properties were also affected by the pH: emulsifying activity and emulsion stability at pH 6 were 82.5 and 100% respectively. The highest foaming capacity (126%) occurred at pH 2; however, it increased by 104% with the addition of 0.25 g glucose g(-1) protein to the foam system. CONCLUSION: In the light of its functional properties found in this study, safflower protein isolate produced by ultrafiltration is recommended for use as an ingredient in food products such as salad dressing, meat products, mayonnaise, cakes, ice cream and desserts.
Assuntos
Carthamus tinctorius/química , Emulsificantes/química , Tecnologia de Alimentos , Proteínas de Plantas/química , Sementes/química , Emulsões/química , Géis , Glucose/química , Concentração de Íons de Hidrogênio , Proteínas de Plantas/isolamento & purificação , Ultrafiltração , Água/químicaRESUMO
Extracellular signal-regulated kinases (ERKs) are widely implicated in multiple physiological processes. Although ERK1/2 has been proposed as a common mediator of antidepressant action in naive rodents, it remains to be determined whether the ERK1/2 pathway plays a role in depressive disorder. Here, we investigated whether chronic restraint stress (14 days) and antidepressant treatment [desipramine (DMI), 10 mg/kg intraperitoneally] induce changes in animal behavior and hippocampal levels of phospho-ERK1/2 and its substrate phospho-cAMP response element-binding protein (CREB). The results indicated that stress-induced depressive-like behaviors were correlated with an increase in P-ERK1/2 and P-CREB in the hippocampus evaluated by immunoblot analysis. As an indication of CREB activity, we evaluated changes in mRNA levels of its target genes. Brain-derived neurotrophic factor (BDNF) mRNA was reduced by stress, an effect prevented by DMI only in the CA3 area of hippocampus. Bcl-2 mRNA was reduced in all hippocampal regions by stress, an effect independent of DMI treatment. However, immunoblot from hippocampal extracts revealed that stress increased BCL-2 levels, an effect prevented by chronic DMI. These results suggest that ERKs and BDNF may be altered in depressive disorder, modifications that are sensitive to DMI action. In contrast, the stress-induced increase in BCL-2 may correspond to a neuroprotective response.
Assuntos
Antidepressivos/farmacologia , Fator Neurotrófico Derivado do Encéfalo/metabolismo , Desipramina/farmacologia , Hipocampo/metabolismo , Fármacos Neuroprotetores/farmacologia , Estresse Psicológico/prevenção & controle , Animais , Antidepressivos/uso terapêutico , Comportamento Animal , Biomarcadores/metabolismo , Fator Neurotrófico Derivado do Encéfalo/genética , Proteína de Ligação ao Elemento de Resposta ao AMP Cíclico/genética , Proteína de Ligação ao Elemento de Resposta ao AMP Cíclico/metabolismo , Desipramina/uso terapêutico , MAP Quinases Reguladas por Sinal Extracelular/genética , MAP Quinases Reguladas por Sinal Extracelular/metabolismo , Hipocampo/efeitos dos fármacos , Injeções Intraperitoneais , Masculino , Fármacos Neuroprotetores/uso terapêutico , RNA Mensageiro/metabolismo , Ratos , Ratos Sprague-Dawley , Estresse Psicológico/metabolismo , Estresse Psicológico/psicologiaRESUMO
BACKGROUND: With the advent of new diagnostic technologies and the fear of low diagnostic accuracy, there has been a reduction in the use of fine needle aspiration (FNA) for diagnosis of breast lesions. The objectives of the present study were to establish the diagnostic accuracy and complications associated with FNA of breast lesions. MATERIAL AND METHODS: We retrospectively reviewed FNA of breast lesions done in a tertiary referral center in Mexico City from 1999 through 2001. We analyzed demographic, radiologic and pathological variables in order to establish diagnostic accuracy of FNA. The gold standard was considered the histopathologic study of the specimen or the clinical follow-up of benign lesions. Categorical variables were analyzed with the X2 method and statistical significance was considered at p < 0.05. RESULTS: We identified 300 patients with a mean age of 50 years (range, 20-86). Fifty-three percent were postmenopausal. In ninety-three percent of patients, FNA was performed in the outpatient clinic. Nonpalpable lesions were aspirated under ultrasound guidance. Mean size of the lesion was 2.27 cm (range 0.7-10 cm). Thirty-one percent of patients had definite diagnosis of malignancy. The only variables associated with cancer diagnosis were the BI-RADS category and the presence of palpable adenopathy. Cancer was diagnosed in 6.5% of lesions categorized as BI-RADS 0-3 compared to 56.2% for lesions BI-RADS 4-5 (p < 0.0001). Positive predictive value and specificity of FNA were 100%. Sensitivity, negative predictive value and accuracy were 82.6%, 92.8% and 94.7%, respectively. The most common diagnosis of false negative lesions were lobular and papillary carcinomas. There were no significant complications associated with FNA. CONCLUSIONS: Diagnostic accuracy of FNA for breast lesions is very high with minimal complications. Positive predictive value of 100% allows to establish therapy based on its results.