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Background: Colonoscopy is a resource used for the diagnosis, treatment, and monitoring of benign and malignant colorectal pathologies. The incidence of perforation is 0.03%-0.65% in diagnostic colonoscopy; however, the incidence can be up to 10 times higher in therapeutic interventions, such as polypectomies, increasing the risk of complications up to 0.07-2.1%. Materials and methods. Case report of a 71-year-old female who presents a rare complication due to a perforation in the sigmoid which developed pneumoperitoneum, pneumomediastinum, pneumothorax, and massive subcutaneous emphysema as a complication of a diagnostic colonoscopy where a biopsy of a friable lesion was performed. Results: A 71-year-old female that went to the emergency room due to acute generalized abdominal colic spasm pain with a duration of 7 hours, associated with significant abdominal distension, malaise, diaphoresis, progressive dyspnea, and massive subcutaneous emphysema that developed after performing panendoscopy and colonoscopy for diverticulosis follow-up. An abdominal CT scan with double contrast was performed, reporting suggestive data of hollow viscus perforation, pneumoperitoneum, pneumomediastinum, pneumothorax, and massive subcutaneous emphysema in the thorax, neck, and skull base. She underwent an exploratory laparotomy finding a perforation in the sigmoid for which sigmoidectomy was performed, and for the pneumothorax and pneumomediastinum, endopleural tubes were placed in both hemithoraxes. The massive subcutaneous emphysema subsided with observation and oxygen. Conclusion: A rare complication of the use of colonoscopy as a diagnostic and therapeutic method is presented. The purpose of presenting this case is for the doctor who performs these interventions to suspect this complication in a timely manner, not delaying the diagnosis and carrying out an urgent therapeutic approach as in this case with exploratory laparotomy, finding the perforation site and carrying out the corresponding surgical management. We demonstrated that massive subcutaneous emphysema can be managed with observation if there is no other alarm data evident that required another surgical approach.
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Mosses of the genus Sphagnum are the dominant vegetation in most pristine peatlands in temperate and high-latitude regions. They play a crucial role in carbon sequestration, being responsible for ca. 50% of carbon accumulation through their active participation in peat formation. They have a significant influence on the dynamics of CO2 emissions due to an efficient maximum potential photosynthetic rate, lower respiration rates, and the production of a recalcitrant litter whose decomposition is gradual. However, various anthropogenic disturbances and land use management actions that favor its reestablishment have the potential to modify the dynamics of these CO2 emissions. Therefore, the objective of this review is to discuss the role of Sphagnum in CO2 emissions generated in peatland ecosystems, and to understand the impacts of anthropogenic practices favorable and detrimental to Sphagnum on these emissions. Based on our review, increased Sphagnum cover reduces CO2 emissions and fosters C sequestration, but drainage transforms peatlands dominated by Sphagnum into a persistent source of CO2 due to lower gross primary productivity of the moss and increased respiration rates. Sites with moss removal used as donor material for peatland restoration emit twice as much CO2 as adjacent undisturbed natural sites, and those with commercial Sphagnum extraction generate almost neutral CO2 emissions, yet both can recover their sink status in the short term. The reintroduction of fragments and natural recolonization of Sphagnum in transitional peatlands, can reduce emissions, recover, or increase the CO2 sink function in the short and medium term. Furthermore, Sphagnum paludiculture is seen as a sustainable alternative for the use of transitional peatlands, allowing moss production strips to become CO2 sink, however, it is necessary to quantify the emissions of all the components of the field of production (ditches, causeway), and the biomass harvested from the moss to establish a final closing balance of C.
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Ecossistema , Sphagnopsida , Dióxido de Carbono/análise , Áreas Alagadas , SoloRESUMO
The nixtamalization process used for tortilla production entails extended processing time and generates pollutant effluents. Ohmic heating (OH) is an emerging technology that uses an alternating electric current for rapid and uniform food heating and mitigates effluent concerns. However, gaps exist in nutrient bioavailability studies. In this work, we assessed OH's impact on tortilla nutritional value, protein, and calcium using a rat model. Twenty-five male Wistar rats were fed one of four diets for 21 days: raw corn (RC) as an experimental control, OH-processed tortillas (OHTs), traditionally processed tortillas (TPTs), commercial tortillas (CTs), and a casein diet (CD) as a growth control. Despite similar protein and macronutrient profiles, OH significantly enhanced insoluble fiber content. The weight gain sequence was OHTs > TPTs > CTs > RC. OHTs exhibited superior protein digestibility (88.52%), which was 3% higher than other diets. The serum albumin (2.63-2.73 g/dL) indicated moderate malnutrition due to the tortilla's lower protein content. Nonetheless, the protein efficiency ratio (1.2-1.74) showed no significant difference from TPTs. Bone characteristics and fracture strength resembled the tortilla-fed groups, surpassing RC. X-ray diffraction and scanning electron microscopy confirmed that the OHT and TPT diets improved male rat bone thickness and crystallinity. The findings suggest the potential for OH as an eco-friendly tortilla production method, maintaining nutritional value comparable to traditional methods.
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It is well known that using retrograded starches confers many technological advantages, as well as health benefits when consumed in adequate doses; however, these properties are closely related to the type of starch and/or the treatment applied, therefore, it is of interest to add retrograded starch to popular products such as Greek yogurt. The aim of this work was to investigate the effect of adding two types of retrograded corn starch with different amylose content to a non-strained type of Greek-style yogurt. Retrograded starch from starch containing 27 % (RNS) or 70 % (RHS) amylose was added to yogurt at 0, 10, 12.5, or 15 g/100 g before storage at 4 °C for 14 d. The resistant starch (RS) content, pH, syneresis, flow behavior index, and consistency index, were measured every week. A sensory test was carried out in yogurt added with 12.5 g/100 g of retrograded starches to evaluate acceptance. Adding retrograded starch significantly reduced syneresis while increased the consistency, firmness, and resistant starch content of the yogurt. No significant differences in general acceptance were observed in samples added with RNS when compared to the control. Although a significant difference was observed after adding RHS, the acceptance of the product is still convenient. Adding a high concentration of retrograded starch could help to ensure doses enough for a prebiotic effect of RS with concentrations of 1.74 ± 0.37 to 2.32 ± 0.09 g/100 g and from 3.5 ± 0.08 to 4.21 ± 0.08 g/100 g when RNS or RHS is added respectively, while maintaining the quality characteristics of Greek-style yogurt during storage without compromising the acceptability.
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Amilose , Amido , Amido/química , Amilose/química , Amido Resistente , Iogurte , PrebióticosRESUMO
Cerebellar-thalamo-striatal synaptic communication has been implicated in a wide range of behaviors, including goal-directed actions, and is altered in cerebellar dystonia. However, its detailed connectivity through the thalamus and its contribution to the execution of forelimb movements is unclear. Here, we use trans-synaptic and retrograde tracing, ex vivo slice recordings, and optogenetic inhibitions during the execution of unidirectional or sequential joystick displacements to demonstrate that the deep cerebellar nuclei (DCN) influence the dorsal striatum with a very high probability. We show that this mainly occurs through the centrolateral (CL), parafascicular (PF), and ventrolateral (VL) nuclei of the thalamus, observing that the DCNâVL and DCNâCL pathways contribute to the execution of unidirectional forelimb displacements while the DCNâPF and DCNâthalamoâstriatal pathways contribute to the appropriate execution of forelimb reaching and sequential displacements. These findings highlight specific contributions of the different cerebellar-thalamo-striatal paths to the control of skilled forelimb movement.
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Núcleos Cerebelares , Corpo Estriado , Animais , Tálamo , Cerebelo , Movimento , Membro AnteriorRESUMO
Artificial neural networks (ANN) and data analysis (DA) are powerful tools for supporting decision-making. They are employed in diverse fields, and one of them is nanotechnology; for example, in predicting silver nanoparticles size. To our knowledge, we are the first to use ANN to predict liposome size (LZ). Liposomes are lipid nanoparticles used in different biomedical applications that can be produced in Dean-Forces-based microdevices such as the Periodic Disturbance Micromixer (PDM). In this work, ANN and DA techniques are used to build a LZ prediction model by using the most relevant variables in a PDM, the Flow Rate Radio (FRR), and the Total Flow Rate (TFR), and the temperature, solvents, and concentrations were kept constant. The ANN was designed in MATLAB and fed data from 60 experiments with 70% training, 15% validation, and 15% testing. For DA, a regression analysis was used. The model was evaluated; it showed a 0.98147 correlation coefficient for training and 0.97247 in total data compared with 0.882 obtained by DA.
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Pumpkin pulp is the main waste generated by pumpkin seed growers. This agro-industrial waste is a valuable source of bioactive compounds, especially carotenoids (ß-carotene, α-carotene, and lutein), which exhibit a broad spectrum of health-promoting effects. In this study, vegetable oils (canola, corn, and soybean oil) were used as green solvent alternatives to conventional organic solvents for carotenoid extraction from dried pumpkin pulp (DPP) waste. The highest carotenoid extraction yield (CEY) was obtained with canola oil, at a 1:10 DPP/oil ratio. Response surface methodology (RSM) was used to optimize the extraction process parameters (temperature, time, and stirring rate) through a Box-Behnken design (BBD) maximizing CEY in canola oil. The extraction temperature and stirring rate were found to have a significant linear and quadratic effect, respectively, on CEY. Optimum conditions were achieved at 21.8 min, 250 rpm, and 60°C. Under these optimized conditions, the estimated value for CEY was 378.1 µg ß-carotene equivalents/g of DPP, corresponding to 61.6% of the total carotenoid content present in the DPP. In contrast, the observed experimental value was 373.2 µg ß-carotene equivalents/g of DPP (61.2%). The experimental value was very close to the estimated value, which verifies the model's adequacy and fit. This study shows an alternative method to extract carotenoids from DPP with canola oil, obtaining an oil naturally enriched with carotenoids that could be used as a potential functional ingredient in the development of food, cosmetics, and medicinal products. PRACTICAL APPLICATION: Pumpkin by-products are a potential carotenoid source. Vegetable oil can be used as an alternative solvent for carotenoid extraction from pumpkin residues to obtain an enriched carotenoid oil that can be used to formulate food products.
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Carotenoides/isolamento & purificação , Fracionamento Químico/métodos , Cucurbita/química , Extratos Vegetais/química , Óleos de Plantas/química , Solventes/química , Carotenoides/análise , TemperaturaRESUMO
Objetivo: Comparar el ángulo de la guía condílea sagital obtenida del registro radiográfico y clínico en pacientes dentados. Materiales y métodos: La muestra estuvo conformada por un grupo único de estudio de 32 pacientes, en el que se evaluó la radiografía lateral estricta y los registros posicionales: en relación céntrica, registro protrusivo a 5 mm en lateralidad derecha y registro protrusivo a 5 mm en lateralidad izquierda. Con el registro posicional del arco facial se articuló el modelo superior, con el registro posicional en relación céntrica se articuló el modelo inferior, con los registros laterales protrusivos de los lados derecho e izquierdo se obtuvo la medida del ángulo de la guía condílea sagital para la programación del articulador semiajustable. El plan estadístico en la presente investigación utilizó el programa SPSS versión 24, la normalidad fue evaluada usando el test de Shapiro-Wilk, también se realizaron las pruebas de T de Student y correlación de Pearson. Resultados: Se determinó estadísticamente que el género y la edad influyen en la medida del ángulo de la guía condílea sagital. El método radiográfico presentó un ángulo de guía condílea de 35,69 ±5,18 y con el método clínico fue 35,69 ± 5,16 (p > 0,05). La prueba de correlación de Pearson sí mostró una correlación importante entre ambos métodos r = 0,948, p < 0,001. Conclusiones: Existe alta correlación en las medidas obtenidas del ángulo de la guía condílea sagital con los registros radiográficos y clínicos; esta concordancia permitiría reemplazar un método por el otro. (AU)
Objective: To compare the angle of the sagittal condylar guidance obtained from the radiographic and clinical records of dentate patients. Materials and Methods: The sample consisted of 32 patients in whom strict lateral radiography and positional records were performed: in centric relation, protrusive recording 5 mm in right laterality and protrusive recording 5 mm in left laterality. With the positional registration of the facebow, the upper model was articulated, while the lower model was articulated with the positional registration in centric relation, and with the protrusive lateral registrations on the right and left side the condylar guidance was obtained for programming the semi-adjustable articulator. Statistics were performed with the SPSS program version 24 in Spanish. Normality was evaluated using the Shapiro-Wilk test, for data with normal distribution, and the Student's T test and Pearson's correlation were performed in descriptive statistics. Results: The statistical analyses showed that gender and age influence the angle measurement of the sagittal condylar guide. The radiographic method presented a condylar guide angle of 35.69 ± 5.18, being 35.69 ± 5.16 with the clinical method (p> 0.05). Pearson's correlation test showed an important correlation between the two methods (r = 0.948, p <0.001). Conclusions: There is a high correlation in the measurements obtained from the angle of the sagittal condylar guide and the radiographic and clinical records, indicating that both methods are effective. (AU)
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Humanos , Masculino , Feminino , Adulto , Adulto Jovem , Radiografia Panorâmica , Cefalometria , Oclusão Dentária , Côndilo Mandibular , Epidemiologia Descritiva , Estudos Transversais , Estudos Retrospectivos , Estudos Observacionais como AssuntoRESUMO
In this study we focused on urban bird diversity across Mexico, a megadiverse country, with a special focus on the relative role of urban greenspaces and heavily-built sites. We considered a country-wide approach, including 24 different sized Mexican cities. Our aims were to describe the urban bird diversity in focal cities and further assess the relationships between it and the biogeographic region where cities are located, their size, elevation, and annual rainfall. Additionally, we evaluated differences in the functional composition of bird communities in both studied urban scenarios (i.e., urban greenspaces, heavily-built sites). Our results confirm that urban greenspaces are home to a large proportion of species when contrasted with heavily-built sites. While total species richness and species richness of greenspaces were related with the cities' biogeographic region -with higher species richness in the Neotropical region and Transition Zone-, the relationship did not hold true in heavily-built sites. We found that annual rainfall was negatively related to bird richness in heavily-built sites, suggesting that species from arid systems can be more tolerant to urbanization. Regarding the bird functional group assessment, results show a clear differentiation between the functional groups of greenspaces and those of heavily-built sites, with granivores and omnivores associated with the latter and a highly diverse array of functional groups associated with urban greenspaces.
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Biodiversidade , Aves , Animais , Cidades , Ecossistema , México , UrbanizaçãoRESUMO
Objective: To compare the angle of the sagittal condylar guidance obtained from the radiographic and clinical records of dentate patients. Materials and Methods: The sample consisted of 32 patients in whom strict lateral radiography and positional records were performed: in centric relation, protrusive recording 5 mm in right laterality and protrusive recording 5 mm in left laterality. With the positional registration of the facebow, the upper model was articulated, while the lower model was articulated with the positional registration in centric relation, and with the protrusive lateral registrations on the right and left side the condylar guidance was obtained for programming the semi-adjustable articulator. Statistics were performed with the SPSS program version 24 in Spanish. Normality was evaluated using the Shapiro-Wilk test, for data with normal distribution, and the Student's T test and Pearson's correlation were performed in descriptive statistics. Results: The statistical analyses showed that gender and age influence the angle measurement of the sagittal condylar guide. The radiographic method presented a condylar guide angle of 35.69 ± 5.18, being 35.69 ± 5.16 with the clinical method (p> 0.05). Pearson's correlation test showed an important correlation between the two methods (r = 0.948, p <0.001). Conclusions: There is a high correlation in the measurements obtained from the angle of the sagittal condylar guide and the radiographic and clinical records, indicating that both methods are effective.
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This work presents a non-linear Self-Consistent (SC) micromechanics method to model the observed physical elastic properties of a terrigenous formation with the purpose to obtain its depth mineral volume fractions profile. In this approach, it is first assumed that the observed physical elastic properties obtained from well logs, such as the density [Formula: see text] and the elastic compressional [Formula: see text] and shear [Formula: see text] velocities, are a non-linear relationship of the unknown mineral volume fractions [Formula: see text]. Then, a gradient descent algorithm is implemented to seek for those volume fractions [Formula: see text] for which differences between modelled and observed physical elastic properties are minimum. It is assumed that quartz, calcite and clay are the main comprising minerals of the formation. Obtained volume fractions profile follow the same general trends to those estimated by implementing the Linear Least-Squares Inversion LLSI method which is widely used in petrophysical analysis to obtain mineral concentrations from density [Formula: see text], photoelectric effect [Formula: see text] and compressional slowness [Formula: see text] well logs. Results also show that calcite and clay volume fractions from these two methods are highly correlated while quartz volume fractions show low correlation. Further comparison between clay concentrations from SC method with clay concentrations calculated from direct measurements of gamma ray GR well logs used as a guideline also exhibits high correlation. These results suggest that the SC method is better suited to obtain clay and calcite volume fractions rather than quartz volume fractions. However, SC method can provide with insights about the general distribution of quartz along the borehole.
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SUMMARY: This study evaluated the effect of resistance exercise training (RET) on body composition and muscle strength in 16 older women during summer holidays (70.5 ± 8.4 years old; Range 60-87). Exercise sessions were carried out for twelve weeks, two sessions per week, with 60 minutes of exercise per session. We measured body mass index (BMI), fat mass percentage (FM%, by bioimpedance) and grip strength with a dynamometer before and after the intervention. The participants showed a significant increase in BMI (p<0.05), FM% (p<0.001), and a significant gain in grip strength (p<0.05). The RET program could be an important strategy for improving strength for older women, but we would suggest combining it with other interventions, such as aerobic exercises with gradually increasing intensity and nutrition interventions, in order to maintain a steady weight during holiday periods.
RESUMEN: Este estudio evaluó el efecto del entrenamien- to con ejercicios de resistencia (EER) sobre la composición corpo- ral y la fuerza muscular en 16 mujeres adultas mayores durante las vacaciones de verano (70,5 ± 8,4 años; Rango 60-87). Las sesio- nes de ejercicio se llevaron a cabo durante doce semanas, dos ve- ces por semana, con 60 minutos de ejercicio por sesión. Se evaluó el índice de masa corporal (IMC), el porcentaje de masa grasa (% MG, por bioimpedancia) y la fuerza de presión con un dinamómetro manual antes y después de la intervención. Las participantes mos- traron un aumento significativo en el IMC (p< 0,05), % de MG (p<0,001) y un incremento significativo en la fuerza prensil (p <0,05). El programa de EER podría ser una estrategia importante para mejorar la fuerza de mujeres adultas mayores durante el periodo estival. El EER se sugiere combinarlo con otras variables, como ejercicios aeróbicos con intensidad gradualmente creciente y una intervención nutricional, para mantener un peso constante durante los períodos de vacaciones.
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Humanos , Feminino , Idoso , Composição Corporal , Força da Mão/fisiologia , Treinamento Resistido/métodos , Pressão , Estações do Ano , Peso Corporal , Índice de Massa Corporal , Adiposidade , Treinamento Resistido , Férias e FeriadosRESUMO
Es imposible separar la enfermedad física de la enfermedad mental, puesto que la fisiopatología de cualquier enfermedad contiene a la esfera psicológica dentro de sus múltiples elementos. En ese sentido, muchas especialidades médicas pueden reclamar su relación con la Psiquiatría, puesto que son innumerables las enfermedades que tienen nexo con signos y síntomas psiquiátricos (por ejemplo, la enfermedad inflamatoria intestinal en Gastroenterología; el asma bronquial en Neumología, entre otras). No obstante, con la Dermatología la relación es mucho más evidente. La Psicodermatología es una especialidad que surge de la conjunción de dos ramas aparentemente divergentes de la Medicina: la Psiquiatría y la Dermatología. En Psicodermatología, algunos pacientes presentan enfermedades principalmente dermatológicas con comorbilidades psicosociales secundarias, mientras que otros tienen trastornos psiquiátricos primarios con sintomatología cutánea significativa. Así también, debido a que varias enfermedades dermatológicas no solo se acompañan frecuentemente de dolor e incomodidad, sino que son inmediatamente visibles para los demás, las personas afectadas por estas condiciones pueden sufrir consecuencias sociales y emocionales. Con base en lo anterior, este artículo de revisión presenta los conceptos, nosología y modelos de abordaje de esta ciencia médica, haciendo hincapié que, debido a la interacción permanente entre la mente y la piel, se hace necesario que el paciente sea tratado como una unidad constituida por varios niveles, incluyendo aspectos cutáneos, emocionales y mentales.
It is impossible to separate the physical illness from the mental illness, since the pathophysiology of any disease contains the psychological sphere within its multiple elements. In this sense, many medical specialties can claim their relationship with Psychiatry, since there are innumerable diseases that have a link with psychiatric signs and symptoms (for example, inflammatory bowel disease in Gastroenterology; bronchial asthma in Pneumology, among others). However, with Dermatology the relationship is much more evident. Psychodermatology is a specialty that arises from the conjunction of two apparently divergent branches of Medicine: Psychiatry and Dermatology. In Psychodermatology, some patients present mainly dermatological diseases with secondary psychosocial comorbidities, while others have primary psychiatric disorders with significant cutaneous symptoms. Also, because various dermatologic diseases are not only frequently accompanied by pain and discomfort, but are immediately visible to others, people affected from these conditions can suffer social and emotional consequences. Based on the above, this review article presents the concepts, nosology, and approach models of this medical science, emphasizing that due to the permanent interaction between the mind and the skin, it is necessary for the patient to be treated as an unit made up of several levels, including cutaneous, emotional and mental aspects.
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Transtornos Mentais , Psiquiatria , DermatologiaRESUMO
Pomolic acid (PA) isolated from Licania pittieri has hypotensive effects in rats, inhibits human platelet aggregation and elicits endothelium-dependent relaxation in rat aortic rings. The present study was designed to investigate the effects of PA on cardiomyocytes. Trabeculae and enzymatically isolated cardiomyocytes from rats were used to evaluate the concentration-dependent effects of PA on cardiac muscle tension and excitation-contraction coupling (ECC) by recording Ca2+ transients reported with Fluo-3 and Fura-2, as well as L-type Ca2+ currents (LTCC). PA reduced the contractile force in rat cardiac trabeculae with an EC50 =â¯14.3⯱â¯2.4⯵M. PA also reduced the amplitude of Ca2+ transients in a concentration-dependent manner, with an EC50 =â¯10.5⯱â¯1.3⯵M, without reducing sarcoplasmic reticulum (SR) Ca2+ loading. PA decreased the half width of the Ca2+ transient by 31.7⯱â¯3.3% and increased the decay time and decay time constant (τ) by 7.6⯱â¯2.7% and 75.6⯱â¯3.7%, respectively, which was associated with increased phospholamban (PLN) phosphorylation. PA also reversibly reduced the macroscopic LTCC in the cardiomyocyte membrane, but did not demonstrate any effects on skeletal muscle ECC. In conclusion, PA reduces LTCC, Ca2+ transients and cardiomyocyte force, which along with its vasorelaxant effects explain its hypotensive properties. Increased PLN phosphorylation protected the SR from Ca2+ depletion. Considering the effects of PA on platelet aggregation and the cardiovascular system, we propose it as a new potential, multitarget cardiovascular agent with a demonstrated safety profile.
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Acoplamento Excitação-Contração/efeitos dos fármacos , Contração Miocárdica/efeitos dos fármacos , Miócitos Cardíacos/efeitos dos fármacos , Miócitos Cardíacos/metabolismo , Ácido Oleanólico/análogos & derivados , Animais , Canais de Cálcio Tipo L/metabolismo , Masculino , Miócitos Cardíacos/citologia , NG-Nitroarginina Metil Éster/farmacologia , Ácido Oleanólico/farmacologia , Fosforilação/efeitos dos fármacos , Ratos , Ratos Sprague-Dawley , Retículo Sarcoplasmático/efeitos dos fármacos , Retículo Sarcoplasmático/metabolismoRESUMO
One of the main inputs driving striatal activity is the thalamostriatal projection. While the hypothesis postulating that the different thalamostriatal projections contribute differentially to shape the functions of the striatum is largely accepted, existing technical limitations have hampered efforts to prove it. Here, through the use of electrophysiological recordings of antidromically photo-identified thalamostriatal neurons and the optogenetic inhibition of thalamostriatal terminals, we identify that the thalamostriatal projections from the parafascicular and the ventroposterior regions of the thalamus contribute to the smooth initiation and the appropriate execution of a sequence of movements. Our results support a model in which both thalamostriatal projections have specific contributions to the initiation and execution of sequences, highlighting the specific contribution of the ventroposterior thalamostriatal connection for the repetition of actions.
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Corpo Estriado/fisiologia , Intenção , Movimento/fisiologia , Rede Nervosa/fisiologia , Tálamo/fisiologia , Animais , Corpo Estriado/química , Feminino , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Rede Nervosa/química , Optogenética/métodos , Tálamo/químicaRESUMO
The dopaminergic neurons of the ventral tegmental area (VTA) have been identified with the ability to co-release dopamine and glutamate. This ability was first documented in the nucleus accumbens but showed to be absent in the dorsal striatum. Recently the ability to release glutamate from a subpopulation of the VTA dopaminergic neurons has been shown to control the prefrontal cortex (PFC) excitation through the exclusive innervation of GABAergic fast spiking interneurons. Here, using an optogenetic approach, we expand this view by presenting that the VTA dopaminergic neurons do not only innervate interneurons but also pyramidal PFC neurons. This finding opens the range of possibilities for the VTA dopaminergic neurons to modulate the activity of PFC.
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Neurônios Dopaminérgicos/metabolismo , Ácido Glutâmico/metabolismo , Mesencéfalo/metabolismo , Córtex Pré-Frontal/metabolismo , Transdução de Sinais/fisiologia , Animais , Neurônios Dopaminérgicos/química , Feminino , Masculino , Mesencéfalo/química , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Transgênicos , Optogenética/métodos , Técnicas de Cultura de Órgãos , Córtex Pré-Frontal/químicaRESUMO
Abstract Calvertius tuberosus (Curculionidae) lives exclusively on Araucaria araucana trees (commonly known as pehuen) in southern Chile. In this study, morphometric and molecular genetic analyses of Andean and coastal populations of C. tuberosus were performed to evaluate evolutionary divergence associated with the discontinuity of the Araucaria forest between the coastal and Andean regions. Specimens of C. tuberosus were collected in Nahuelbuta National Park, Villa Las Araucarias, and Malalcahuello National Reserve and were classified and stored at the Animal Biotechnology Researching Laboratory (LINBA), University of La Frontera, Temuco, Chile. Thirteen morphometric parameters and the expression patterns of ISSR (inter-simple sequence repeat) markers were analyzed. Morphometric data revealed high phenotypic similarity between coastal populations. The genetic analysis revealed a high similarity between coastal populations (genetic identity, 93%), which were differentiated from the Andean population (genetic identity, 84%). This study contributes new genotypic and phenotypic data for the C. tuberosus populations in forest ecosystems of A. araucana, and clarifies the associations between these characteristics and the geographic distributions of populations.
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CONTEXT: The agreement between glucose-based and hemoglobin A1c (HbA1c)-based American Diabetes Association criteria in the diagnosis of normal glucose tolerance, prediabetes, or diabetes is under scrutiny. A need to explore the issue among different populations exists. OBJECTIVE: Examine the results obtained with both methods in the diagnosis of the glycemic status. DESIGN: The Mexico City Diabetes Study is a population-based, prospective investigation. SETTING: Low-income elder urban community. PARTICIPANTS: All 854 participants without known diabetes had both oral glucose tolerance test (OGTT) and HbA1c measurements on the same day of the 2008 phase. INTERVENTIONS: Standardized protocol: questionnaires, anthropometry, and biomarkers. MAIN OUTCOME: Diagnostic classification of American Diabetes Association criteria. RESULTS: We found by OGTT normal glucose tolerance (NGT) in 512 (59.9%) participants, prediabetes [impaired fasting glucose (IFG) and/or impaired glucose tolerance (IGT)] in 261 (30.5%), and diabetes in 81 (9.4%). In total, 232 in the NGT group (45.3%) and 158 in the prediabetes group (60.5%) had HbA1c ≥6.5%. Body mass index, waist circumference, and blood pressure were significantly different among OGTT-defined diabetic status groups but not in the HbA1c-diagnosed group. We identified 404 participants in the NGT group with confirmed NGT throughout all phases of the Mexico City Diabetes Study. Of these, 184 (45.5%) had HbA1c ≥6.5%. In a vital/diabetes status follow-up performed subsequently, we found that, of these, 133 remained nondiabetic, 3 had prediabetes, 7 had diabetes, and 13 had died without diabetes; we were unable to ascertain the glycemic status in 5 and vital status in 23. CONCLUSIONS: Normal OGTT coexisting with elevated HbA1c is a common finding in this cohort. It is possible that this finding is not mediated by hyperglycemia. This might occur in similar populations.
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Direct muscle neurotization has been proved to be a feasible technique for facial reanimation microsurgical procedures. Direct muscle neurotization is performed by implanting the interposition nerve graft directly into the substance of the muscle. The authors present the case of a 36-year-old male patient with upper eyelid dysfunction secondary to facial trauma. The levator palpebrae superioris muscle was macroscopically unaffected; however, neurophysiological test proved a selective denervation of the CN III motor branch to the levator palpebrae superioris muscle. Direct muscle neurotization was performed by means of 2 separate nerve procedures. The authors have made follow-up for 3 months after surgery. The authors have noted development of upper eyelid movement meaning adequate function of the neurotized muscle. The authors believe that this procedure could be integrated into the surgical options to treat selective nerve injuries should the right patient is encountered.
Assuntos
Blefaroptose/cirurgia , Traumatismos Faciais/cirurgia , Transferência de Nervo , Músculos Oculomotores/inervação , Músculos Oculomotores/cirurgia , Adulto , Blefaroptose/etiologia , Traumatismos Faciais/complicações , Humanos , Masculino , MovimentoRESUMO
Abstract Rabies is a fatal zoonotic disease caused by a neurotropic RNA virus part of the family Rhabdoviridae. The disease is characterized by encephalitic inflammation and is responsible for a number of annual fatal deaths of people and animals in the world. Chiropters such as insectivorous, frugivorous and hematophagous bats are the major transmitters, reservoirs, and vectors of the rabies virus. In Colombia, a total of thirty-five cases of human rabies occurred between 2000 2014. Of the thirty-five cases twenty-two were transmitted by bats. The genetic variant V3 (hematophagous bats) were responsible for 24 human deaths, while the genetic variant V4, carried by insectivorous bats, caused three human deaths. The disease is mainly linked to infected cats that may have hunted infected bats and then transmitted the virus to humans. Diagnosis is usually made by detection of the virus from infected animals and techniques such as RT-PCR, which might be used to promote active surveillance in bat populations. Rabies is a preventable disease and vaccination of pets confers protective immunity, however, vaccination coverage of pets in Colombia is still limited. This review article collects epidemiological data of rabies virus genetic variants associated with chiropters species that have been reported to transmit the virus in the world and emphasizes on rabies cases reported in Colombia during the last decades.
Resumen La rabia es una enfermedad zoonóticas mortal causada por un virus ARN neurotrópico de la familia Rhabdoviridae. La enfermedad se caracteriza por encefalitis y es responsable de múltiples muertes anuales de personas y animales. Quirópteros insectívoros, frugívoros y hematófagos son los principales transmisores, reservorios y vectores del virus. En Colombia, un total de 35 casos de rabia humana fueron reportados entre 2000- 2014, veintidós de ellos fueron transmitidos por murciélagos. La variante genética V3 (murciélagos hematófagos) fue responsable de 24 muertes humanas, mientras que la variante genética V4 (murciélagos insectívoros) causó tres muertes humanas. La enfermedad es transmitida al humano principalmente por gatos infectados que pudieron haber cazado murciélagos infectados. El diagnóstico se realiza mediante la detección del virus en animales rabiosos y técnicas como RT-PCR podrían utilizarse para promover la vigilancia activa de las poblaciones de murciélagos. La rabia es una enfermedad prevenible y la vacunación en animales domésticos confiere inmunidad protectora, sin embargo, la cobertura de vacunación en animales domésticos en Colombia es aún limitada. Esta revisión recoge datos epidemiológicos de las variantes genéticas del virus en especies de quirópteros reportadas como transmisores del virus en el mundo y enfatiza en los casos de rabia reportados en Colombia durante las últimas décadas.
Resumo A raiva é uma enfermidade zoonótica fatal causada pelo vírus neurotrópico do ARN da família Rhabdoviridae. A enfermidade é conhecida por encefalite e é responsável das numerosas mortes anuais de animais e pessoas. Quirópteros e insetívoros, frugívoros e sanguessugas são os principais transmissores, reservatórios e vetores do vírus. Na Colômbia o Instituto Nacional de Saúde relatou um total de 35 casos de raiva humana entre 2000- 2014. Vinte dois deles foram transmitidos pelos morcegos. A variante genética V3 (morcegos hematófagos) foi responsável de 24 mortes humanas. Enquanto a variante genética V4 (morcegos insetívoros) provoco três mortes humanas. A enfermidade está ligada principalmente á os gatos infectados que poderiam ter caçado morcegos infectados e, em seguida, transmitida a os seres humanos. Diagnóstico e normalmente feito a través da detecção do vírus em animais raivosos e técnicas tais como RT- PCR poderiam se utilizar para promover a vigilância ativa das populações de morcegos. A raiva é uma enfermidade evitável em animais domésticos cuja vacinação confere imunidade protetora, no entanto, a cobertura de vacinação em animais de estimação na Colômbia ainda é limitada, precisando de mais cobertura. Este artigo de revisão recolha dados epidemiológicos e variantes genéticas do vírus, e a diversidade de espécies de morcego reportado como transmissores do vírus no mundo. O manuscrito também resume os principais casos de raiva reportados na Colômbia nas últimas décadas e enfatiza a necessidade de reforçar a vigilância ativa para o diagnóstico de raiva em morcegos em todo o país.