Metformin mitigates the impaired development of skeletal muscle in the offspring of obese mice

Background: Maternal obesity is linked with offspring obesity and type 2 diabetes. Skeletal muscle (SM) insulin resistance is central to the development of diabetes. Adenosine monophosphate (AMP)-activated protein kinase (AMPK) is inhibited in SM of fetuses born to obese mothers

Perfil do cirurgião de coluna brasileiro

OBJECTIVE: To conduct cross-sectional study identifying the profile of the Brazilian spinal surgeon. METHODS: Data were collected through a questionnaire with multiple alternatives during two major events for spine surgery at national level in 2011, the Congresso da Sociedade Brasileira de Coluna (Congress of the Brazilian Spine Society) and Simpósio Internacional de Coluna (International Spine Symposium, SINCOL). The data were submitted to statistical analysis comparing and stratifying the information obtained according to the profile. RESULTS: We obtained 182 questionnaires answered by orthopedists and neurosurgeons with peculiarities and similarities on their medical management. CONCLUSIONS: The data obtained in this study may be important for the development of health policies in the spine surgery in Brazil.OBJETIVO: Llevar a cabo estudio transversal para identificar el perfil del cirujano de columna en Brasil. MÉTODOS: Los datos fueron recolectados por medio de cuestionarios con opciones múltiples, en dos eventos de relevancia para la cirugía de columna vertebral, a nivel nacional en 2011, Congreso Brasileño de la Sociedad Brasileña de Columna (SBC) y el Simposio Internacional de Columna (SINCOL). Los datos fueron sometidos a análisis estadístico, comparándose y estratificándose las informaciones obtenidas, de acuerdo con el perfil encontrado. RESULTADOS: Se obtuvieron cuestionarios respondidos por 182 ortopedistas y neurocirujanos, con particularidades y similitudes en sus actividades médicas. CONCLUSIONES: Los datos obtenidos en este estudio pueden ser importantes para el desarrollo de políticas de salud en el área de la cirugía de columna en Brasil.OBJETIVO: Realizar estudo transversal identificando o perfil do cirurgião de coluna no Brasil. MÉTODOS: Foram coletados dados por meio de questionários com múltiplas alternativas, em dois eventos de relevância para a cirurgia de coluna no âmbito nacional em 2011, o Congresso da Sociedade Brasileira de Coluna (SBC) e o Simpósio Internacional de Coluna (SINCOL). Os dados foram submetidos a análise estatística comparando e estratificando as informações obtidas conforme o perfil encontrado. RESULTADOS: Obtivemos 182 questionários respondidos por ortopedistas e neurocirurgiões com particularidades e semelhanças em suas condutas médicas. CONCLUSÕES: Os dados obtidos nessa pesquisa podem ser importantes para o desenvolvimento de políticas de saúde na área de cirurgia de coluna no Brasil.Universidade Federal de São Paulo (UNIFESP) Departamento de Ortopedia e TraumatologiaUNIFESP, Depto. de Ortopedia e TraumatologiaSciEL

Changes in cell shape, cytoskeletal proteins and adhesion sites of cultured cells after extracellular Ca2+ chelation

Although much is known about the molecules involved in extracellular Ca2+ regulation, the relationship of the ion with overall cell morphology is not understood. The objective of the present study was to determine the effect of the Ca2+ chelator EGTA on the major cytoskeleton components, at integrin-containing adhesion sites, and their consequences on cell shape. Control mouse cell line C2C12 has a well-spread morphology with long stress fibers running in many different directions, as detected by fluorescence microscopy using rhodamine-phalloidin. In contrast, cells treated with EGTA (1.75 mM in culture medium) for 24 h became bipolar and showed less stress fibers running in one major direction. The adhesion plaque protein alpha5-integrin was detected by immunofluorescence microscopy at fibrillar adhesion sites in both control and treated cells, whereas a dense labeling was seen only inside treated cells. Microtubules shifted from a radial arrangement in control cells to a longitudinal distribution in EGTA-treated cells, as analyzed by immunofluorescence microscopy. Desmin intermediate filaments were detected by immunofluorescence microscopy in a fragmented network dispersed within the entire cytoplasm in EGTA-treated cells, whereas a dense network was seen in the whole cytoplasm of control cells. The present results suggest that the role of extracellular Ca2+ in the regulation of C2C12 cell shape can be mediated by actin-containing stress fibers and microtubules and by intermediate filament reorganization, which may involve integrin adhesion sites