Browsing by Author "Carrasco, C."

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    Anthropometric Characteristics of Elite Rhythmic Gymnasts
    (2016) Arriaza, E.; Rodriguez, C.; Carrasco, C.; Mardones, C.; Niedmann, L.; López Fuenzalida, Antonio Eduardo
    The main aim of this study was to identify the morphological characteristics, to determine the tendency in the physical structure, differences and similarities according to categories based on age of the Chilean team of Rhythmic Gymnastics. We performed an anthropometric analysis of 60 gymnasts, fractioned by categories: preschoolers and schoolers (n = 11), junior (n = 28) and senior (n = 21). The anthropometric analysis was determined based on the study of the body composition, through pentacompartimental fractionation method (Kerr), somatotype (Heath & Carter) and the body mass index (Quetelet). The results showed significant differences between preschoolers and schoolers and higher categories (junior and senior) in the general anthropometric variables of body mass, height and BMI. Regarding the body composition, we only found significant differences in the percentage of muscle mass between the preschoolers and schoolers when being compared with the other two categories. In the study of somatotype, the prevalence of ectomorphic categorization was only found in the preschoolers and schoolers (meso-ectomorph), while in the junior category a mesomorph-ectomorph somatotype was observed and a central type in the senior category. We conclude that the morphology of the selected Chilean Rhythmic gymnastics depends on the category, as observed in the anthropometric characteristics related to the body composition and somatotype. Therefore, this factor is not useful in establishing a clearer tendency in the morph structure for this sport at a national level.
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    Antioxidant screening of medicinal herbal teas
    (2006) Speisky, Hernán; Rocco, C.; Carrasco, C.; Lissi, E.A.; López Alarcón, Camilo Ignacio
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    Hormonal, Radiological, NP-59 Scintigraphy, and Pathological Correlations in Patients With Cushing’s Syndrome Due to Primary Pigmented Nodular Adrenocortical Disease (PPNAD)
    (2015) Vezzosi, D.; Tenenbaum, F.; Cazabat, L.; Tissier, F.; Bienvenu, M.; Carrasco, C.; Laloi-Michelin, M.; Barrande, G.; Lefebvre, H.; Hieronimus, S.; Tabarin, A.; Bertagna, X.; Legmann, P.; Vantyghem, M.; Bertherat, J.
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    Stimulation of the sympathetic perimesenteric arterial nerves releases neuropeptide Y potentiating the vasomotor activity of noradrenaline: Involvement of neuropeptide Y-Y1 receptors
    (1997) Donoso Gomien, María Verónica; Brown, Nelson; Carrasco, C.; Cortés Mora, Víctor Antonio; Fournier, A.; García-Huidobro Toro, Juan Pablo
    Neuropeptide Y (NPY) appears to be involved in the sympathetic regulation of vascular tone. To assess the putative role of NPY in mesenteric circulation, the release and biological effect of NPY were examined after electrical stimulation of perimesenteric arterial nerves. Nerve stimulation with trains of 2-30 Hz increased the perfusion pressure of the arterially perfused rat mesenteric bed in a frequency- and time-dependent fashion. Trains of 15-30 Hz significantly displaced to the left, approximately threefold, the noradrenaline (NA)-induced pressor concentration-response curve, in addition to increasing significantly its efficacy. Perfusion with 10 nM exogenous NPY mimicked the electrical stimulation effect, causing a threefold leftward shift of the NA concentration-response curve and increasing the maximal NA response. These effects were antagonized by 100 nM BIBP 3226, indicating the activity of NPY-Y1 receptors. Electrical stimulation of the perimesenteric nerves released immunoreactive NPY (ir- NPY) in a frequency-dependent fashion; the ir-NPY coelutes with synthetic NPY as confirmed by HPLC. Both the electrically induced pressor response and the calcium-dependent release of NPY were obliterated in preparations perfused with 1 μM guanethidine or in rats pretreated intravenously for 48 h with 6- hydroxydopamine, thus revealing the sympathetic origin of these phenomena. Only a small proportion of the total NPY content in the perimesenteric arterial nerves is released after electrical stimulation. Chromatographic studies of the physiological sources of the ir-NPY support that NPY fragments are generated via peptidase degradation. The present findings demonstrate that NPY is released from the perimesenteric arterial sympathetic nerves and acts, via the activation of NPY-Y1 receptors, as the mediator responsible for the potentiation of NA's effect on perfusion pressure in the isolated rat mesenteric bed.
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    Synthesis of a New ent-Cyclozonarone Angular Analog, and Comparison of Its Cytotoxicity and Apoptotic Effects with ent-Cyclozonarone
    (2013) Salas Sánchez, Cristián Osvaldo; Quiñones, N.; Montenegro, I.; Espinoza, L.; Carrasco, C.; Ulloa V.; Villena, J.; Cuellar, M.