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1.
Cir Pediatr ; 36(2): 90-92, 2023 Apr 01.
Artículo en Inglés, Español | MEDLINE | ID: mdl-37093119

RESUMEN

INTRODUCTION: The extensor digitorum brevis manus (EDBM) is an accessory muscle of the dorsum of the hand that may appear as a painful mass. It is treated surgically, usually by excision of the muscle. CASE REPORT: 14-year-old male with bilateral painful masses on the dorsal aspect of his hands. Ultrasound confirmed the diagnosis of EDBM. Due to the associated symptoms, decision was made to conduct surgical treatment with resection of both muscle masses. DISCUSSION: EDBM is an infrequent cause of wrist pain, especially in children and adolescents. Surgical treatment has proven to have a significant impact on the improvement of the symptoms suffered by these patients.


INTRODUCCION: El extensor digitorum brevis manus (EDBM) es un músculo accesorio del dorso de la mano que puede presentarse como una masa dolorosa. Su tratamiento es quirúrgico, generalmente consiste en la extirpación del mismo. CASO CLINICO: Varón de 14 años que presenta tumoraciones dolorosas bilaterales en la cara dorsal de las manos. La ecografía confirma el diagnóstico de EDBM. Debido a la sintomatología asociada, se decide tratamiento quirúrgico, con resección de ambas masas musculares. COMENTARIOS: El EDBM constituye una causa poco frecuente de dolor a nivel de la muñeca, especialmente en población infanto-juvenil. El tratamiento quirúrgico ha demostrado un impacto significativo en la mejoría de la sintomatología que presentan estos pacientes.


Asunto(s)
Mano , Músculo Esquelético , Masculino , Adolescente , Niño , Humanos , Músculo Esquelético/cirugía , Mano/cirugía , Dolor/etiología
2.
Folia Morphol (Warsz) ; 82(1): 17-23, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-34826134

RESUMEN

BACKGROUND: The aims are to evaluate the morphometry of the sellar region and propose a safety window on the floor of the sella turcica for the transsphenoidal approach in a Hispanic population. MATERIALS AND METHODS: We retrospectively analysed 150 computed tomographic angiography sellar region images from asymptomatic patients. The images were evaluated intraobservatory by an expert radiologist. We measured: intercarotid distance of cavernous segment; depth of sella turcica; skull base angle; anterior distance, the distance between anterior spinal nasal and floor of the sella turcica; posterior distance, the distance between anterior spinal nasal and posterior wall of the sella turcica; anterior surgical angle, formed between the floor of the nostril and superior limit of the anterior wall of the sella turcica; and posterior angle, formed between the floor of the nostril and the inferior limit of the posterior wall of the sella turcica. RESULTS: Safety window was based on two measures: the intercarotid distance and depth. The mean of the safety window is 151.13 mm² and 147.60 mm² for men and women, respectively. The intercarotid distance was 17.83 mm. The depth of the sella turcica was 8.46 mm. The skull base angle was 112.13 grades. The anterior distance was 76.34 mm. The posterior distance was 87.59 mm. The anterior surgical angle was 32.76 grades. The posterior surgical angle was 87.59 grades. CONCLUSIONS: The surgical approach space is smaller in females. It could significate a more complicated surgery in this population. Anatomical understanding could reduce complications in hospitals without a neuronavigation system.


Asunto(s)
Neoplasias Hipofisarias , Masculino , Humanos , Femenino , Neoplasias Hipofisarias/diagnóstico por imagen , Neoplasias Hipofisarias/cirugía , Estudios Retrospectivos , Seno Esfenoidal/cirugía , Silla Turca , Angiografía
3.
Folia Morphol (Warsz) ; 82(4): 784-790, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36472393

RESUMEN

BACKGROUND: The study of the tentorial notch can improve the understanding of brain injury mechanisms. Tentorial morphology has been analysed primarily in cadaveric studies. However, the postmortem effect can cause variability in the measurements. The objective was to evaluate the morphometry of the tentorial notch and the third cranial nerve on living subjects using magnetic resonance imaging (MRI). MATERIALS AND METHODS: A retrospective cross-sectional study was performed. Using consecutive cases, 60 MRI scans were analysed for tentorial notch morphology. Maximum notch width (MNW), notch length (NL), interpedunculoclival (IC) distance, apicotectal (AT) distance, third cranial nerve (CN-III) distance, and inter- CN-III angle, were obtained. For the classification of the tentorial notch quartile distribution technique for MNW, NL, AT distance, and IC distance were used. RESULTS: According to the quartile of the MNW, patients were stratified into narrow, midrange, and wide groups. Using the NL quartile groups, they were also classified as short, midrange, and long. With these, the tentorial notch could be classified into eight types. Statistical differences between genders in the MNW and inter-CN-III angle were found, as well as a strong positive correlation between NL and AT distance, and between right and left CN-III distances. CONCLUSIONS: There were differences between the cadaveric samples and living subjects in the CN-III distances. This difference could be explained by the dehydration of brain volume in the postmortem process which may cause nerve elongation. Morphometry of the tentorial notch and its neurovascular relations allows a better understanding of the mechanisms of brain herniation.


Asunto(s)
Imagen por Resonancia Magnética , Humanos , Masculino , Femenino , Estudios Retrospectivos , Estudios Transversales , Imagen por Resonancia Magnética/métodos , Espectroscopía de Resonancia Magnética , Cadáver
4.
Cir Pediatr ; 35(4): 207-211, 2022 Oct 01.
Artículo en Inglés, Español | MEDLINE | ID: mdl-36217792

RESUMEN

OBJECTIVES: The treatment of keloid scars is based on multiple lines of therapy, with varying levels of efficacy(1), and there is currently no single treatment that guarantees cure and prevents recurrence. In the pediatric population, the treatments used are not standardized, and there is insufficient evidence to support efficacy and complications. The objective of this study was to analyze the patients who required brachytherapy as an adjuvant to surgical resection in recurrent keloid scars. MATERIALS AND METHODS: A retrospective analysis of patients diagnosed with keloids and undergoing adjuvant brachytherapy in our institution was carried out, while assessing efficacy and implementation in our treatment protocol for keloid scarring. RESULTS: After various therapeutic lines, 4 patients aged 9-17 years old with recurrent keloid scars around the ear and eligible for adjuvant brachytherapy - administered after surgical resection, in two sessions - were studied and followed up for up to 18-21 months. CONCLUSIONS: Despite our limited experience in the use of adjuvant brachytherapy, the results obtained to date support its efficacy, as reported in the literature. We therefore consider its inclusion in the treatment of keloid scars that have recurred after other treatments to be appropriate.


OBJETIVOS: El tratamiento de las cicatrices queloideas se basa en múltiples líneas terapéuticas, con diferentes niveles de eficacia(1), sin existir actualmente un tratamiento que garantice su curación y prevenga su recurrencia. En la población pediátrica los tratamientos empleados no están estandarizados y no hay evidencia suficiente que avale su eficacia y sus complicaciones. Este trabajo tiene como objetivo analizar los pacientes que han precisado braquiterapia coadyuvante a la resección quirúrgica en cicatrices queloideas recidivantes. MATERIAL Y METODOS: Análisis retrospectivo de los pacientes diagnosticados en nuestro centro de cicatriz queloidea, en los que se realizó braquiterapia coadyuvante, valorando su eficacia y su implementación en nuestro protocolo de tratamiento de la cicatriz queloidea. RESULTADOS: Se estudiaron 4 pacientes entre 9-17 años con cicatrices queloideas a nivel auricular, recidivantes a varias líneas terapéuticas, que fueron candidatos para el uso de braquiterapia coadyuvante, administrada posterior a la resección quirúrgica, en dos sesiones, se realizó seguimiento hasta 18-21 meses. CONCLUSIONES: A pesar de nuestra limitada experiencia en el uso de la braquiterapia coadyuvante, los resultados obtenidos hasta la fecha avalan su eficacia, de acuerdo con lo publicado en la literatura. Consideramos adecuada su inclusión en el tratamiento de cicatrices queloideas recidivantes a otros tratamientos.


Asunto(s)
Braquiterapia , Queloide , Adolescente , Braquiterapia/métodos , Niño , Humanos , Queloide/complicaciones , Queloide/radioterapia , Queloide/cirugía , Recurrencia , Estudios Retrospectivos , Resultado del Tratamiento
6.
Cir Pediatr ; 35(2): 70-74, 2022 Apr 01.
Artículo en Inglés, Español | MEDLINE | ID: mdl-35485754

RESUMEN

INTRODUCTION: Acute appendicitis is the most frequent cause of acute abdomen in children. The objective of this study was to analyze the causes, approach, and results of complications requiring surgery following appendectomy. MATERIAL AND METHODS: A retrospective study of the appendectomies conducted in three third-level institutions from 2015 to 2019 was carried out. Complications, causes, and number of re-interventions, time from one surgery to another, surgical technique used, operative findings at baseline appendectomy according to the American Association for the Surgery of Trauma (AAST) classification, and hospital stay were collected. RESULTS: 3,698 appendicitis cases underwent surgery, 76.7% of which laparoscopically, with 37.2% being advanced (grades II-V of the AAST classification). Mean operating time was 50.4 minutes (49.8 ± 20.1 for laparoscopy vs. 49.9 ± 20.1 for open surgery, p > 0.05), and longer in patients requiring re-intervention (68.6 ± 27.2 vs. 49.1 ± 19.3, p < 0.001). 76 re-interventions (2.05%) were carried out. The causes included postoperative infection (n = 46), intestinal obstruction (n = 20), dehiscence (n = 4), and others (n = 6). Re-intervention risk was not impacted by the baseline approach used (open surgery or laparoscopy, OR: 1.044, 95% CI: 0.57-1.9), but it was by appendicitis progression (7.8% advanced vs. 0.7% incipient, OR: 12.52, 95% CI: 6.18-25.3). There was a tendency to use the same approach both at baseline appendectomy and re-intervention. This occurred in 72.2% of laparoscopic appendectomies, and in 67.7% of open appendectomies. The minimally invasive approach (50/76) was more frequent than the open one (27 laparoscopies and 23 ultrasound-guided drainages vs. 26 open surgeries) (p < 0.05). 55% of obstruction patients underwent re-intervention through open surgery (p > 0.05). CONCLUSION: Re-intervention rate was higher in advanced appendicitis cases. In this series, the minimally invasive approach (laparoscopic or ultrasound-guided drainage) was the technique of choice for re-interventions.


INTRODUCCION: La apendicitis aguda es la causa más frecuente de abdomen agudo en niños. El objetivo de este trabajo es estudiar las causas, abordaje y resultados de las complicaciones que requieren intervención quirúrgica después de la apendicectomía. MATERIAL Y METODOS: Estudio retrospectivo de las apendicectomías realizadas en 3 centros de tercer nivel entre 2015-2019. Se recogieron las complicaciones, causas y número de reintervenciones, intervalo entre ambas cirugías, técnica empleada, hallazgos operatorios según la Clasificación de la American Association for the Surgery of Trauma (AAST) en la apendicectomía inicial y tiempo de ingreso. RESULTADOS: Se intervinieron 3.698 apendicitis, un 76,7% por vía laparoscópica, encontrando un 37,2% evolucionadas (grado II-V de la clasificación AAST). El tiempo medio quirúrgico fue de 50,4 minutos (laparoscopia 49,8 ± 20,1 vs. laparotomía 49,9 ± 20,1, p > 0,05), superior en aquellos pacientes que requirieron reintervención (68,6 ± 27,2 vs. 49,1 ± 19,3, p < 0,001). Se realizaron 76 reintervenciones (2,05%). Las causas fueron: infección postoperatoria (n = 46), obstrucción intestinal (n = 20), dehiscencia (n = 4) y otras (n = 6). El abordaje inicial no influyó en el riesgo de reintervención (laparotomía o laparoscopia, OR 1,044, IC 95% 0,57-1,9), pero sí el grado de evolución de la apendicitis (7,8% evolucionadas vs. 0,7% incipientes, OR 12,52, IC 95% 6,18-25,3). Hubo una tendencia a reintervenir por el mismo abordaje que la apendicectomía, esto ocurrió en un 72,2% de las apendicectomías laparoscópicas y en un 67,7% de las apendicectomías abiertas. El abordaje mínimamente invasivo (50/76) fue más frecuente que la laparotomía (27 laparoscopias y 23 drenajes ecoguiados frente a 26 laparotomías) (p < 0,05). El 55% de los pacientes obstruidos se reintervinieron por vía abierta (p > 0,05). CONCLUSION: El índice de reintervención fue superior en las apendicitis evolucionadas. En esta serie, el abordaje mínimamente invasivo (laparoscópico o drenaje ecoguiado) fue la técnica de elección en las reintervenciones.


Asunto(s)
Apendicitis , Laparoscopía , Apendicectomía/métodos , Apendicitis/cirugía , Niño , Humanos , Laparoscopía/métodos , Tiempo de Internación , Estudios Retrospectivos
7.
Cir Pediatr ; 34(1): 20-27, 2021 Jan 01.
Artículo en Inglés, Español | MEDLINE | ID: mdl-33507640

RESUMEN

OBJECTIVES: Laparoscopic learning curves are slow, and there are no uniform surgical skill acquisition models. Therefore, our objective was to assess a laparoscopic skill learning program in individuals without any surgical experience, analyzing the learning curve by means of a certified custom-made simulator, and evaluating whether previous surgical experience had an impact on the learning curve. MATERIAL AND METHODS: A certified custom-made simulator and laparoscopic instruments were used to assess 20 university students who performed 10 repetitions of 3 exercises of growing difficulty (eye-hand coordination, hand-hand coordination, and cutting). Three parameters were analyzed: total time with each hand, total mistakes with each hand, and three items of the OSATS technical skill scale. The two first exercises were compared with a group of 14 experienced surgeons. Statistical analysis using repeated-measures Anova and Student's t-test was carried out (p < 0.05). RESULTS: Significant time improvement with each repetition was demonstrated in the three exercises. Curve stabilization was faster in surgeons (2-4 repetitions) than in students (8-9). Time reduction was noted in the first and second exercises in both groups, with 44.08% and 33.1% shorter times, respectively. CONCLUSIONS: Individuals without surgical experience acquired basic laparoscopic skills using a custom-made simulator, which allows simple surgical techniques to be carried out in an inexpensive, accessible fashion. Previous surgical experience was associated with a shorter learning curve. The custom-made simulator allowed individuals with and without surgical experience to be distinguished from each other.


OBJETIVOS: La curva de aprendizaje en cirugía laparoscópica es lenta y no existen modelos uniformes de adquisición de habilidades quirúrgicas. Tratamos de establecer la idoneidad de un programa de aprendizaje de habilidades laparoscópicas en sujetos sin experiencia quirúrgica, analizando la curva de aprendizaje utilizando un simulador artesanal homologado. Comprobar si la experiencia quirúrgica previa modifica la curva de aprendizaje. MATERIAL Y METODOS: Se empleó un simulador artesanal validado e instrumental laparoscópico para evaluar a 20 estudiantes universitarios que realizaron 10 repeticiones de tres ejercicios de dificultad creciente (coordinación ojo-mano, coordinación mano-mano y corte). Se evaluaron tres parámetros: tiempo total y con cada mano, errores totales y con cada mano y tres ítems de habilidad técnica OSATS. Comparación de los dos primeros ejercicios con un grupo de 14 cirujanos con experiencia. Análisis estadístico mediante Anova para medidas repetidas y t de Student (p < 0,05). RESULTADOS: Se demostró la mejoría significativa del tiempo con cada repetición en los tres ejercicios. La estabilización de la curva fue más precoz entre los cirujanos (2-4 repeticiones) que los estudiantes (8-9). Se comprobó la reducción del tiempo invertido para el primer y segundo ejercicio en ambos grupos, que en los estudiantes fue del 44,08% y 33,1% respectivamente. CONCLUSIONES: Individuos sin experiencia quirúrgica desarrollan habilidades laparoscópicas básicas utilizando un simulador artesanal, que permite practicar técnicas quirúrgicas sencillas de forma barata y accesible. La experiencia quirúrgica previa se asocia con el acortamiento de la curva de aprendizaje. El simulador artesanal permite discriminar entre sujetos con y sin experiencia quirúrgica.


Asunto(s)
Laparoscopía , Curva de Aprendizaje , Competencia Clínica , Humanos
8.
Cir Pediatr ; 33(4): 183-187, 2020 Oct 01.
Artículo en Inglés, Español | MEDLINE | ID: mdl-33016658

RESUMEN

OBJECTIVE: Sirolimus mTOR inhibitor represents a major advance in the treatment of patients with complicated vascular abnormalities. The objective of this study was to present our series of pediatric patients with vascular abnormalities treated with oral sirolimus, and to conduct a review of the relevant literature. MATERIAL AND METHODS: A retrospective analysis of patients with complicated vascular abnormalities treated with oral sirolimus in our healthcare facility from 2016 was carried out. Initial dosage was 0.8 mg/m2 every 12 hours, and therapeutic range was 5-15 ng/ml. All patients received trimethoprim-sulfamethoxazole prophylaxis. RESULTS: 6 children -3 boys and 3 girls- with a mean age of 9.5 years at treatment initiation were included. 3 of them had head and neck lymphatic malformation, 2 had lower limb venous malformation, and 1 had combined lymphatic-venous malformation at the thoracoabdominal level. They all had received multiple previous treatments without improvement. Following sirolimus initiation, 5 patients had clinical improvement (mean time: 3.6 months) and 4 had radiological improvement (mean time: 6.6 months). Mild and transitory adverse effects were noted in the 3 cases. Today, 5 patients remain under treatment. CONCLUSIONS: Oral sirolimus is an effective and safe treatment in patients with complicated vascular abnormalities. Our results support sirolimus use in lymphatic and venous malformations in which previous treatments have failed, with a good symptomatic and, to a lesser extent, radiological response.


OBJETIVOS: El uso del inhibidor mTOR sirolimus ha supuesto un avance en el tratamiento de pacientes con anomalías vasculares complicadas. El objetivo de este estudio es presentar nuestra serie de pacientes pediátricos con anomalías vasculares tratados con sirolimus oral y hacer una revisión de la literatura al respecto. MATERIAL Y METODOS: Se realizó un análisis retrospectivo de los pacientes con anomalías vasculares complicadas tratados con sirolimus oral en nuestro centro desde el año 2016. La dosis inicial utilizada fue de 0,8 mg/m2 cada 12 horas y el rango terapéutico de 5-15 ng/ml. Todos los pacientes recibieron profilaxis con trimetoprim-sulfametoxazol. RESULTADOS: Se incluyeron seis niños, tres varones y tres mujeres, con una edad media al inicio del tratamiento de 9,5 años. Tres presentaban una malformación linfática en cabeza y cuello, dos una malformación venosa en miembro inferior y la última una malformación combinada linfática-venosa a nivel toracoabdominal. Todos habían recibido múltiples tratamientos previos sin mejoría. Tras el inicio de sirolimus, cinco pacientes mejoraron clínicamente (tiempo medio 3,6 meses) y cuatro radiológicamente (tiempo medio 6,6 meses). Se registraron efectos adversos leves y transitorios en tres casos. Actualmente, cinco pacientes continúan con el tratamiento. CONCLUSIONES: El sirolimus oral es un tratamiento eficaz y seguro en pacientes con anomalías vasculares complicadas. Nuestros resultados apoyan su uso en malformaciones linfáticas y venosas en las que han fracasado otros tratamientos, presentando buenas respuestas sintomáticas y, en menor medida, radiológicas.


Asunto(s)
Anomalías Linfáticas/tratamiento farmacológico , Sirolimus/administración & dosificación , Malformaciones Vasculares/tratamiento farmacológico , Administración Oral , Adolescente , Niño , Preescolar , Femenino , Humanos , Anomalías Linfáticas/fisiopatología , Masculino , Estudios Retrospectivos , Sirolimus/efectos adversos , Resultado del Tratamiento , Malformaciones Vasculares/fisiopatología
9.
Sci Rep ; 9(1): 14744, 2019 10 14.
Artículo en Inglés | MEDLINE | ID: mdl-31611563

RESUMEN

Schistosomiasis is one of the most prevalent Neglected Tropical Disease, affecting approximately 250 million people worldwide. Schistosoma mansoni is the most important species causing human intestinal schistosomiasis. Despite significant efforts in recent decades, the global disease burden of schistosomiasis remains extremely high. This could partly be attributed to the absence of accurate diagnostic tools, primarily in endemic areas. Loop-mediated isothermal amplification (LAMP) is increasingly used in molecular diagnostics as a field-friendly alternative to many other complex molecular methods and it has been proposed as an ideal candidate for revolutionizing point-of-care molecular diagnostics. In a previous work, a LAMP-based method to detect S. mansoni DNA (SmMIT-LAMP) was developed by our research group for early diagnosis of active schistosomiasis in an experimental infection murine model. The SmMIT-LAMP has been further successfully evaluated in both human stool and snail samples and, recently, in human urine samples. In this study, we developed an important improvement for SmMIT-LAMP molecular assay, transforming it into a cold maintenance dry format suitable for potentially manufacturing as kit for ready-to-use for schistosomiasis diagnosis. This procedure could be applied to create dry LAMP kits for a laboratory setting and for diagnostic applications for other neglected tropical diseases.


Asunto(s)
ADN de Helmintos/análisis , Técnicas de Diagnóstico Molecular/métodos , Técnicas de Amplificación de Ácido Nucleico/métodos , Schistosoma mansoni/aislamiento & purificación , Esquistosomiasis mansoni/diagnóstico , Animales , ADN de Helmintos/genética , Humanos , Sistemas de Atención de Punto , Schistosoma mansoni/genética , Esquistosomiasis mansoni/parasitología , Sensibilidad y Especificidad
10.
Neuroscience ; 322: 208-20, 2016 May 13.
Artículo en Inglés | MEDLINE | ID: mdl-26917271

RESUMEN

Epigallo-catechin-3-gallate (EGCG), found in the leaves of Camellia sinensis (green tea), has antioxidant- and scavenger-functions and acts neuroprotectively. It has been publicized as anti-aging remedy but data on potential cellular mechanisms are scarce. Recent studies claimed that EGCG specifically promotes neural precursor cell proliferation in the dentate gyrus of C57Bl/6 mice, without changes at the level of immature and mature new neurons. We here analyzed the effects of EGCG on adult hippocampal neurogenesis in male Balb/C mice and saw a different pattern. Two weeks of treatment with EGCG (0, 0.625, 1.25, 2.5, 5 and 10mg/kg) showed a dose-response curve that peaked at 2.5mg/kg of EGCG with significantly increased cell survival without affecting cell proliferation but decreasing apoptotic cells. Also, EGCG increased the population of doublecortin-(DCX)-expressing cells that comprises the late intermediate progenitor cells (type-2b and -3) as well as immature neurons. After EGCG treatment, the young DCX-positive neurons showed more elaborated dendritic trees. EGCG also significantly increased net neurogenesis in the adult hippocampus and increased the hippocampal levels of phospho-Akt. Ex vivo, EGCG exerted a direct effect on survival and neuronal differentiation of adult hippocampal precursor cells, which was absent, when PI3K, a protein upstream of Akt, was blocked. Our results thus support a pro-survival and a pro-neurogenic role of EGCG. In the context of the conflicting published results, however, potential genetic modifiers must be assumed. These might help to explain the overall variability of study results with EGCG. Our data do indicate, however, that natural compounds such as EGCG can in principle modulate brain plasticity.


Asunto(s)
Catequina/análogos & derivados , Supervivencia Celular/efectos de los fármacos , Hipocampo/efectos de los fármacos , Neurogénesis/efectos de los fármacos , Neuronas/efectos de los fármacos , Fármacos Neuroprotectores/farmacología , Animales , Catequina/química , Catequina/farmacología , Supervivencia Celular/fisiología , Células Cultivadas , Relación Dosis-Respuesta a Droga , Proteínas de Dominio Doblecortina , Proteína Doblecortina , Hipocampo/fisiología , Masculino , Ratones Endogámicos BALB C , Proteínas Asociadas a Microtúbulos/metabolismo , Células-Madre Neurales/efectos de los fármacos , Células-Madre Neurales/fisiología , Neurogénesis/fisiología , Neuronas/fisiología , Neuropéptidos/metabolismo , Fármacos Neuroprotectores/química , Fosfatidilinositol 3-Quinasas/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Té/química
11.
Neuroscience ; 260: 158-70, 2014 Feb 28.
Artículo en Inglés | MEDLINE | ID: mdl-24361917

RESUMEN

Hippocampus is one of the brain regions in which neuroplastic changes occur. Paradigms such as environmental enrichment (ENR) have been used to prevent or delay the neuroplastic changes of the hippocampus during aging. Here, we investigated the beneficial effects of ENR on dendritic spines and hippocampal neurogenesis in middle age Balb/c mice. ENR increased the number of dendritic spines, cell survival, and intermediate stages of the hippocampal neurodevelopment process. Also, ENR alters the distribution of cells involved in the neurogenic process along the dorsal-ventral dentate gyrus. In addition, ENR increased the proportion of cells with more mature dendritic morphology and net hippocampal neurogenesis. Whole-hippocampus protein extracts revealed that ENR increases the levels of BDNF, phospho-Akt and phospho-MAPK1/2, suggesting that the positive effects of ENR on neuroplasticity in middle age Balb/c mice involve the participation of these key-signaling proteins. Our results suggest that ENR is a relevant strategy to prevent neuroplastic decline by increasing the formation of both dendritic spines and new neurons in the hippocampus during middle age.


Asunto(s)
Espinas Dendríticas/ultraestructura , Ambiente , Hipocampo/metabolismo , Hipocampo/ultraestructura , Neurogénesis/fisiología , Plasticidad Neuronal , Animales , Factor Neurotrófico Derivado del Encéfalo/metabolismo , Proteína Doblecortina , Quinasas MAP Reguladas por Señal Extracelular/metabolismo , Femenino , Ratones , Ratones Endogámicos BALB C , Fosforilación , Proteínas Proto-Oncogénicas c-akt/metabolismo
12.
J Mater Sci Mater Med ; 24(1): 161-9, 2013 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-23053800

RESUMEN

The potential use of anodised zirconium as permanent implant has been investigated. Zirconium was anodised at constant potential between 3 and 30 V in H(3)PO(4). Electrochemical assays were conducted in simulated body fluid solution (SBF) in order to evaluate the effect of the surface oxide on the corrosion resistance in vitro after 30 days of immersion. The rupture potential increases when increasing thickness of the anodic surface film. The increase in the barrier effect when increasing anodising potential is also verified by EIS. Anodisation in H(3)PO(4) proved to increase the apatite formation capability of zirconium in a single step. In vivo bone formation was also analysed by implanting the modified materials in Wistar rats. Anodised Zr presents higher corrosion resistance in SBF in all the studied immersion times when compared with non anodised Zr. Additionally, in vivo experiments evidence bone generation and growth in contact with zirconium implants both in the as-received and anodised condition.


Asunto(s)
Electrodos , Prótesis e Implantes , Circonio/química , Animales , Técnicas Electroquímicas , Técnicas In Vitro , Ratas , Ratas Wistar , Propiedades de Superficie
13.
Nutr Hosp ; 27(6): 1900-7, 2012.
Artículo en Inglés | MEDLINE | ID: mdl-23588437

RESUMEN

OBJECTIVE: Assess the hepatoprotective effect of Taurine (Tau) in cases of hepatic cholestasis induced by Total Parenteral Nutrition (TPN). METHODS: We describe a retrospective series of 54 patients who received TPN, in which cholestasis was detected at an (Intermediate) point that separates the duration of TPN into 2 Phases. From this moment -Phase 2- on, and according to clinical criteria, some patients (Group A, n = 27) received amino acids with Tau (22.41 ± 3.57 mg/kg/day)(Tauramin®), while the rest (Group B, n = 27) received the standard solution without Tau. The mean TPN durations were 39.2 ± 17.1 and 36.4 ± 18.1 days respectively, with the Intermediate points on days 19.56 ± 10.51 and 17.89 ± 11.14. They all received diets that were homogeneous in terms of kcal and macronutrients. In Phase 2, 21 patients from Group A received structured lipids (SMOFlipid®); while 20 from Group B received soy MCT/LCT [ Medium Chain Triglycerides/Long Chain Triglycerides ] (physical or structured mixture). In a retrospective study, differences could not be avoided. The analytical parameters from three periods (Initial, Intermediate, and Final) were obtained from Nutridata® and Servolab®. We compared interperiod values using the Wilcoxon test SPSS® (p < 0.05). RESULTS: After introducing Taurine AST, ALT, and GGT were significantly reduced; Bilirubin was also reduced, but not significantly. The values obtained for GGT in Group A were (Mean(σ)/median): Initial 48.6 (23.1)/46; Intermediate 473.7 (276.2)/438, and Final 328.9 (190.4)/305. We stress that the mean GGT value is reduced by 30.56% after adding Taurine, while in its absence all parameters are elevated, and mean GGT increases 45.36%. CONCLUSION: These results show Taurine's hepatoprotective effect and support its use in cases of TPN-induced cholestasis. We acknowledge the possibility that the differences between SMOF and the MCT/LCT mixtures also may have influenced the results in a combined effect with taurine.


Asunto(s)
Colestasis/inducido químicamente , Colestasis/tratamiento farmacológico , Emulsiones Grasas Intravenosas/farmacología , Lípidos/farmacología , Hígado/efectos de los fármacos , Nutrición Parenteral Total/efectos adversos , Taurina/uso terapéutico , Anciano , Enfermedades de las Vías Biliares/inducido químicamente , Enfermedades de las Vías Biliares/tratamiento farmacológico , Femenino , Alimentos Formulados , Humanos , Pruebas de Función Hepática , Masculino , Persona de Mediana Edad , Enfermedades Pancreáticas/inducido químicamente , Enfermedades Pancreáticas/tratamiento farmacológico , Estudios Retrospectivos
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