Computer surgery 3D simulations for a new teaching-learning model

Using 3D computer simulations for training surgeons is not new. Using e-learning for improving students knowledge acquisition is not new. What we propose is to use 3D computer simulations in such a versatile way that those simulations could act as learning objects designed directly by those who own the experience we want to be transmitted. In order to achieve this goal, it is necessary to create a model in charge of communications between the learning objects and the simulation. This model ensures that, on the one hand, the simulation offers an interface to the learning process stable enough not to be affected by every small change. On the other hand, the model also ensures that the simulation offers an interface complete enough for adopting any change in the learning process. The key to solve this contradiction is to take the behavior of the simulation objects out of their control leaving in them just their very basic behavior. This paper presents the problem and the design proposed to solve it in a more detailed wa

Spatial repellents transfluthrin and metofluthrin affect the behavior of \u3cem\u3eDermacentor variabilis\u3c/em\u3e, \u3cem\u3eAmblyomma americanum\u3c/em\u3e, and \u3cem\u3eIxodes scapularis\u3c/em\u3e in an \u3cem\u3ein vitro\u3c/em\u3e vertical climb assay

Repellents serve an important role in bite protection. Tick repellents largely rely on biomechanisms that induce responses with direct contact, but synthetic pyrethroids used as spatial repellents against insects have received recent attention for potential use in tick protection systems. An in vitro vertical climb assay was designed to assess spatial repellency against Dermacentor variabilis, Amblyomma americanum, and Ixodes scapularis adult, female ticks. Climbing behavior was assessed with and without the presence of two spatial repellents, transfluthrin and metofluthrin. Repellency parameters were defined to simulate the natural questing behavior of ambushing ticks, including measures of detachment, pseudo-questing duration, climbing deterrence, and activity. Significant effects were observed within each parameter. D. variabilis showed the greatest general susceptibility to each repellent, followed by A. americanum, and I. scapularis. The most important and integrative measure of repellency was climbing deterrence–a measure of the spatial repellent’s ability to disrupt a tick’s natural propensity to climb. Transfluthrin deterred 75% of D. variabilis, 67% of A. americanum, and 50% of I. scapularis. Metofluthrin was slightly more effective, deterring 81% of D. variabilis, 73% of A. americanum, and 72% of I. scapularis. The present study poses a novel paradigm for repellency and reports a preliminary assessment of spatial repellent effect on tick behavior. Further research will assess spatial repellency in a more natural setting, scale exposure conditions, and incorporate host cues

Depresión, ansiedad, apoyo interpersonal y dolor autopercibido en pacientes con síndrome de fibromialgia

El síndrome de fibromialgia (sf) es una patología que genera gran dificultad en los movimientos, fatiga y dolor en partes del cuerpo, afectando severamente la calidad de vida. El objetivo de este estudio fue determinar los indicadores de depresión, ansiedad, apoyo interpersonal, dolor autopercibido y su relación, en una muestra de pacientes con sf en Colombia. A 100 pacientes se les aplicaron las siguientes pruebas: Inventario de Ansiedad Rasgo Estado, Escala de depresión de Zung, Cuestionario para evaluación del apoyo interpersonal, y la Escala analógica del dolor. Se reportaron niveles moderados de depresión y ansiedad, dificultades específicas en el apoyo social y niveles altos en dolor autopercibido. Las puntuaciones en la escala de depresión se asociaron positivamente con la ansiedad estado y rasgo, pero se asociaron negativamente con el apoyo social. En conclusión, la salud mental, el apoyo interpersonal y el dolor autopercibido se encuentran afectados en los pacientes. Se requiere ajustar los protocolos de atención clínica con el propósito de conservar y potenciar la salud integral en los afectados

Myocardial ischemic subject's thymus fat: A novel source of multipotent stromal cells

Objective Adipose Tissue Stromal Cells (ASCs) have important clinical applications in the regenerative medicine, cell replacement and gene therapies. Subcutaneous Adipose Tissue (SAT) is the most common source of these cells. The adult human thymus degenerates into adipose tissue (TAT). However, it has never been studied before as a source of stem cells. Material and Methods We performed a comparative characterization of TAT-ASCs and SAT-ASCs from myocardial ischemic subjects (n = 32) according to the age of the subjects. Results TAT-ASCs and SAT-ASCs showed similar features regarding their adherence, morphology and in their capacity to form CFU-F. Moreover, they have the capacity to differentiate into osteocyte and adipocyte lineages; and they present a surface marker profile corresponding with stem cells derived from AT; CD73+CD90+CD105+CD14-CD19-CD45-HLA-DR. Interestingly, and in opposition to SAT-ASCs, TAT-ASCs have CD14+CD34+CD133+CD45- cells. Moreover, TAT-ASCs from elderly subjects showed higher adipogenic and osteogenic capacities compared to middle aged subjects, indicating that, rather than impairing; aging seems to increase adipogenic and osteogenic capacities of TAT-ASCs. Conclusions This study describes the human TAT as a source of mesenchymal stem cells, which may have an enormous potential for regenerative medicine.Instituto de Salud Carlos III/FEDER, EU (PI10/01947, PI13/02628), CTS-7895 from the Consejer?a de Econom?a e Innovaci?n, Ciencia y Empleo, Junta de Andaluc?a/FEDER, EU. R. El Bekay is supported by fellowships from the ISCIII/FEDER, EU "Miguel Servet II" (CPII13/00041). AV-R is under a contract Proyectos de I+D+i para j?venes investigadores from the Ministerio de Econom?a y Competitividad (SAF2014-60649-JIN) and co-funded by Fondo Europeo de Desarrollo Regional-FEDER.Scopu

What is the biological basis of pattern formation of skin lesions?

Pattern recognition is at the heart of clinical dermatology and dermatopathology. Yet, while every practitioner of the art of dermatological diagnosis recognizes the supreme value of diagnostic cues provided by defined patterns of 'efflorescences', few contemplate on the biological basis of pattern formation in and of skin lesions. Vice versa, developmental and theoretical biologists, who would be best prepared to study skin lesion patterns, are lamentably slow to discover this field as a uniquely instructive testing ground for probing theoretical concepts on pattern generation in the human system. As a result, we have at best scraped the surface of understanding the biological basis of pattern formation of skin lesions, and widely open questions dominate over definitive answer. As a symmetry-breaking force, pattern formation represents one of the most fundamental principles that nature enlists for system organization. Thus, the peculiar and often characteristic arrangements that skin lesions display provide a unique opportunity to reflect upon – and to experimentally dissect – the powerful organizing principles at the crossroads of developmental, skin and theoretical biology, genetics, and clinical dermatology that underlie these – increasingly less enigmatic – phenomena. The current 'Controversies' feature offers a range of different perspectives on how pattern formation of skin lesions can be approached. With this, we hope to encourage more systematic interdisciplinary research efforts geared at unraveling the many unsolved, yet utterly fascinating mysteries of dermatological pattern formation. In short: never a dull pattern

Diarrea neonatal bovina en un hato del antiplano norte de Antioquia (Colombia), un estudio descriptivo

ABSTRACT: Bovine neonatal diarrhea is a disease, with etiology that can be infectious or non-infectious, which affects calves during the first three and causes serious economic losses in the dairy industry worldwide. This study describes the disease in a dairy herd in the Northern Antioquia Highlands. A cohort of 60 calves was evaluated during the first month of life through clinical examinations, haematological and serology analysis, and ELISA in fecal samples to detect Cryptosporidium parvum, bovine rotavirus type A, bovine coronavirus and E. coli K99. Additionally, the concentration of immunoglobulin in the colostrum administered and the passive transfer of immunoglobulin were estimated. Proportions of morbidity because of diarrhea were 94.92%, general mortality 17.58%, and lethality 15.79%. Among the group of sick animals 89.47%, 47.37%, 7.02% and 0% were found for each pathogenic agent respectively. A high percentage of animals with reactive lymphocytes were observed which indicates parasitic or viral infection. The results obtained from this study suggest that circulation of agents involved in bovine neonatal diarrhea can exist in the area, which generates concern because of the unknown sanitary status in the Northern Antioquia Highlands.RESUMEN: La diarrea neonatal bovina es una enfermedad cuya etiología puede ser infecciosa o no infecciosa, afecta los neonatos bovinos especialmente durante las tres primeras semanas de vida y causa serias pérdidas económicas en el sector lechero a nivel mundial. En este estudio se describió la enfermedad en un hato de producción lechera en el altiplano norte de Antioquia. Se evaluó una cohorte de 60 terneros durante su primer mes de vida mediante examen clínico, análisis hematológicos, de serología, y ELISA en materia fecal para Cryptosporidium parvum, rotavirus bovino tipo A, coronavirus bovino y E. coli K99. Adicionalmente, se estimó la concentración de inmunoglobulinas en el calostro suministrado y la transferencia pasiva de inmunoglobulinas. Se encontraron proporciones de morbilidad por diarrea de 94,92%, mortalidad general de 17,58% y letalidad del 15,79%. Entre los animales enfermos se encontró un porcentaje de 89,47%, 47,37%, 7,02% y 0% para cada agente patógeno respectivamente. Se evidenció un alto porcentaje de animales con linfocitos reactivos, lo que indica la infección con agentes parasitarios o virales. Los resultados obtenidos en este estudio sugieren que puede existir circulación de agentes involucrados en la diarrea neonatal bovina en la zona, lo que genera preocupación por el desconocimiento del estatus sanitario del altiplano norte de Antioquia en general

Clinical veterinary boron neutron capture therapy (BNCT) studies in dogs with head and neck cancer: Bridging the gap between translational and clinical studies

Translational Boron Neutron Capture Therapy (BNCT) studies performed by our group and clinical BNCT studies worldwide have shown the therapeutic efficacy of BNCT for head and neck cancer. The present BNCT studies in veterinary patients with head and neck cancer were performed to optimize the therapeutic efficacy of BNCT, contribute towards exploring the role of BNCT in veterinary medicine, put in place technical aspects for an upcoming clinical trial of BNCT for head and neck cancer at the RA-6 Nuclear Reactor, and assess the feasibility of employing the existing B2 beam to treat large, deep-seated tumors. Five dogs with head and neck cancer with no other therapeutic option were treated with two applications of BNCT mediated by boronophenyl-alanine (BPA) separated by 3–5 weeks. Two to three portals per BNCT application were used to achieve a potentially therapeutic dose over the tumor without exceeding normal tissue tolerance. Clinical and Computed Tomography results evidenced partial tumor control in all cases, with slight-moderate mucositis, excellent life quality, and prolongation in the survival time estimated at recruitment. These exploratory studies show the potential value of BNCT in veterinary medicine and contribute towards initiating a clinical BNCT trial for head and neck cancer at the RA-6 clinical facility.Fil: Schwint, Amanda Elena. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Departamento de Radiobiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Monti Hughes, Andrea. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Departamento de Radiobiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Garabalino, Marcela Alejandra. Comisión Nacional de Energía Atómica; ArgentinaFil: Santa Cruz, Gustavo Alberto. Comisión Nacional de Energía Atómica; ArgentinaFil: González, Sara Josefina. Comisión Nacional de Energía Atómica. Gerencia del Área de Investigación y Aplicaciones No Nucleares. Gerencia Física (Centro Atómico Constituyentes). Proyecto Tandar; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Longhino, Juan Manuel. Comisión Nacional de Energía Atómica; ArgentinaFil: Provenzano, Lucas. Comisión Nacional de Energía Atómica. Gerencia del Área de Investigación y Aplicaciones No Nucleares. Gerencia Física (Centro Atómico Constituyentes). Proyecto Tandar; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Oña, Paulina. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Instituto de Tecnologías Nucleares para la Salud; ArgentinaFil: Rao, Monica. Hospital Veterinario; ArgentinaFil: Cantarelli, María de los Ángeles. Hospital Veterinario; ArgentinaFil: Leiras, Andrea. No especifíca;Fil: Olivera, María Silvina. Comisión Nacional de Energía Atómica; ArgentinaFil: Trivillin, Verónica Andrea. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Departamento de Radiobiología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Alessandrini, Paula. No especifíca;Fil: Brollo, Fabricio Raul. Comisión Nacional de Energía Atómica; ArgentinaFil: Boggio, Esteban Fabián. Comisión Nacional de Energía Atómica; ArgentinaFil: Costa, Hernan. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Instituto de Tecnologías Nucleares para la Salud; ArgentinaFil: Ventimiglia, Romina. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Instituto de Tecnologías Nucleares para la Salud; ArgentinaFil: Binia, Sergio. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Instituto de Tecnologías Nucleares para la Salud; ArgentinaFil: Pozzi, Emiliano César Cayetano. Comisión Nacional de Energía Atómica; ArgentinaFil: Nievas, Susana Isabel. Comisión Nacional de Energía Atómica; ArgentinaFil: Santa Cruz, Iara S.. Comisión Nacional de Energía Atómica; Argentin

Serum Starvation Induced Cell Cycle Synchronization Facilitates Human Somatic Cells Reprogramming

Human induced pluripotent stem cells (iPSCs) provide a valuable model for regenerative medicine and human disease research. To date, however, the reprogramming efficiency of human adult cells is still low. Recent studies have revealed that cell cycle is a key parameter driving epigenetic reprogramming to pluripotency. As is well known, retroviruses such as the Moloney murine leukemia virus (MoMLV) require cell division to integrate into the host genome and replicate, whereas the target primary cells for reprogramming are a mixture of several cell types with different cell cycle rhythms. Whether cell cycle synchronization has potential effect on retrovirus induced reprogramming has not been detailed. In this study, utilizing transient serum starvation induced synchronization, we demonstrated that starvation generated a reversible cell cycle arrest and synchronously progressed through G2/M phase after release, substantially improving retroviral infection efficiency. Interestingly, synchronized human dermal fibroblasts (HDF) and adipose stem cells (ASC) exhibited more homogenous epithelial morphology than normal FBS control after infection, and the expression of epithelial markers such as E-cadherin and Epcam were strongly activated. Futhermore, synchronization treatment ultimately improved Nanog positive clones, achieved a 15–20 fold increase. These results suggested that cell cycle synchronization promotes the mesenchymal to epithelial transition (MET) and facilitates retrovirus mediated reprogramming. Our study, utilization of serum starvation rather than additional chemicals, provide a new insight into cell cycle regulation and induced reprogramming of human cells

DNA multigene characterization of Fasciola hepatica and Lymnaea neotropica and its fascioliasis transmission capacity in Uruguay, with historical correlation, human report review and infection risk analysis

Fascioliasis is a highly pathogenic zoonotic disease emerging in recent decades, in part due to the effects of climate and global changes. South America is the continent presenting more numerous human fascioliasis endemic areas and the highest Fasciola hepatica infection prevalences and intensities known in humans. These serious public health scenarios appear mainly linked to altitude areas in Andean countries, whereas lowland areas of non-Andean countries, such as Uruguay, only show sporadic human cases or outbreaks. To understand this difference, we characterized F. hepatica from cattle and horses and lymnaeids of Uruguay by sequencing of ribosomal DNA ITS-2 and ITS-1 spacers and mitochondrial DNA cox1, nad1 and 16S genes. Results indicate that vectors belong to Lymnaea neotropica instead of to Lymnaea viator, as always reported from Uruguay. Our correlation of fasciolid and lymnaeid haplotypes with historical data on the introduction and spread of livestock species into Uruguay allow to understand the molecular diversity detected. We study the life cycle and transmission features of F. hepatica by L. neotropica of Uruguay under standardized experimental conditions to enable a comparison with the transmission capacity of F. hepatica by Galba truncatula at very high altitude in Bolivia. Results demonstrate that although L. neotropica is a highly efficient vector in the lowlands, its transmission capacity is markedly lower than that of G. truncatula in the highlands. On this baseline, we review the human fascioliasis cases reported in Uruguay and analyze the present and future risk of human infection in front of future climate change estimations