Browsing by Title Artículos de revistas

Now showing items 1470-1489 of 11550

    • CAG repeat polymorphism of androgen receptor gene and X-chromosome inactivation in daughters of women with ... 
      Echiburú López, Bárbara; Pérez Bravo, Francisco; Maliqueo Yevilao, Manuel; Ladrón de Guevara, Amanda; Gálvez, Carla; Crisosto King, Nicolás; Sir Petermann, Teresa (2012)
      Background: The polycystic ovary syndrome (PCOS) is a hyperandrogenic disorder that arise from a combination of genetic and environmental factors. Aim: To assess the role of the androgen receptor (AR) CAG repeat polymorphism ...
    • cagA and vacA in strains of Helicobacter pylori from ulcer and non-ulcerative dyspepsia patients 
      Faundez, Gustavo; Troncoso, Miriam; Figueroa, Guillermo (BioMed Central Ltd., 2002)
      Background: The cytotoxin associated gene A (cagA), and the vacuolating cytotoxin gene A (vacA) of Helicobacter pylori have been associated to phenotypic characteristics of virulence. The objectives of this study were to ...
    • Calcineurin signaling in the heart: The importance of time and place 
      Parra, Valentina; Rothermel, Beverly A. (Academic Press, 2017)
      © 2016 Elsevier LtdThe calcium-activated protein phosphatase, calcineurin, lies at the intersection of protein phosphorylation and calcium signaling cascades, where it provides an essential nodal point for coordination ...
    • Calcitriol oral pulse therapy in children with renal osteodystrophy 
      Cano Schuffeneger, Francisco; Delucchi Bicocchi, María Angela; Wolff, Eduardo; Rodriguez, Eugenio; Fuentes, Angel (Springer-Verlag, 1995)
      A 6-month protocol of oral pulse calcitriol was used in nine uraemic children (2-14 years old) on dialysis who presented with renal osteodystrophy. Calcitriol was administered twice a week, 4 μg per dose for patients over ...
    • Calcium absorption may be affected after either sleeve gastrectomy or Roux-en-Y gastric bypass in premenopausal ... 
      Carrasco, Fernando; Basfi-fer Obregón, Karen; Rojas, Pamela; Csendes Juhasz, Attila; Papapietro Vallejo, Karin; Codoceo, Juana; Inostroza, Jorge; Krebs, Nancy; Westcott, Jamie; Miller, Leland; Ruz Ortiz, Manuel (Oxford University Press, 2018)
      Background: Although Roux-en-Y gastric bypass (RYGBP) is known to reduce calcium absorption (CA), the effects of vertical sleeve gastrectomy (SG) and its long-term implications on CA have not yet been studied. Objective: ...
    • Calcium and gadolinium ions stimulate the GTPase activity of purified chicken brain tubulin through a ... 
      Soto, Claudio; Rodríguez, Patricio H.; Monasterio Opazo, Octavio (1996)
      Ca2+ and Gd3+ stimulated the GTPase activity of chicken brain tubulin 13- and 26-fold, respectively. Mg2+, Tb3+, and Na+ had no effect. This GTPase activity showed a saturation behavior with Ca2+ and Gd3+ with a maximal ...
    • Calcium channel subtypes differentially regulate fusion pore stability and expansion 
      Ardiles, Alvaro O.; González-Jamett, Arlek M.; Maripillán, Jaime; Naranjo, David; Caviedes, Pablo; Cárdenas, Ana María (2007)
      Various studies have focused in the relative contribution of different voltage-activated Ca2+ channels (VACC) to total transmitter release. However, how Ca2+ entry through a given VACC subtype defines the pattern of ...
    • Calcium dependence of ryanodine-sensitive calcium channels from brain cortex endoplasmic reticulum 
      Marengo Olivares, Juan José; Bull Simpfendorfer, Ricardo; Hidalgo Tapia, María Cecilia (Elsevier B.V., 1996)
      Endoplasmic reticulum vesicles isolated from rat brain cortex and fused with lipid bilayers displayed ryanodine-sensitive calcium channels, with three cytoplasmic calcium dependences. A: Channels (n = 5) stimulated by Ca2+ ...
    • Calcium does not inhibit the absorption of 5 milligrams of nonheme or heme iron at doses less than 800 ... 
      Gaitán, Diego; Flores, Sebastián; Saavedra, Pía; Miranda, Constanza; Olivares, Manuel; Arredondo, Miguel; López de Romaña, Daniel; Lönnerdal, Bo; Pizarro Aguirre, Fernando (2011)
      Calcium is the only known component in the diet that may affect absorption of both nonheme and heme iron. However, the evidence for a calcium effect on iron absorption mainly comes from studies that did not isolate the ...
    • Calcium Fluxes, Ion Currents and Dihydropyridine Receptors in a New Immortal Cell Line from Rat Heart Muscle 
      Caviedes, Pablo; Olivares, Enrique; Salas, Karime; Caviedes, Raúl; Jaimovich Pérez, Enrique (1993)
      A cell line (RCVC) in permanent culture was developed from adult rat ventricular cells; transformation was attained by incubation with conditioned media from UCHTI, a rat thyroid cell line. Immortalized ventricular cells ...
    • Calcium microdomains and gene expression in neurons and skeletal muscle cells 
      Carrasco Friz, María Angélica; Hidalgo Tapia, María Cecilia (CHURCHILL LIVINGSTONE, 2006-12)
      Neurons generate particular calcium microdomains in response to different stimuli. Calcium microdomains have a central role in a variety of neuronal functions. In particular, calcium microdomains participate in long-lasting ...
    • Calcium release by ryanodine receptors mediates hydrogen peroxide-induced activation of ERK and CREB ... 
      Kemmerling Weis, Ulrike; Muñoz Dimitrov, Pablo; Müller, Marioly; Sánchez, Gina; Aylwin Ostale, María de la Luz; Klann, Eric; Carrasco Friz, María Angélica; Hidalgo Tapia, María Cecilia (2007)
      Hydrogen peroxide, which stimulates ERK phosphorylation and synaptic plasticity in hippocampal neurons, has also been shown to stimulate calcium release in muscle cells by promoting ryanodine receptor redox modification ...
    • Calcium release mediated by redox-sensitive RyR2 channels has a central role in hippocampal structural ... 
      More, Jamileth Y.; Bruna, Barbara A.; Lobos, Pedro; Galaz, Jose L.; Figueroa, Paula L.; Namias, Silvia; Sánchez, Gina; Barrientos Briones, Genaro; Valdes Guerrero, Jose; Paula Lima, Andrea; Hidalgo Tapia, María Cecilia; Adasme, Tatiana (Mary Ann Liebert Inc publishers, 2018)
      Aims: Previous studies indicate that hippocampal synaptic plasticity and spatial memory processes entail calcium release from intracellular stores mediated by ryanodine receptor (RyR) channels. In particular, RyR-mediated ...
    • Calcium release modulated by inositol trisphosphate in ruptured fibers from frog skeletal muscle 
      Rojas, Cecilia V.; Jaimovich Pérez, Enrique (Springer-Verlag, 1990)
      To investigate the effect of inositol 1,4,5-trisphosphate on calcium release, we used fiber bundles of frog sartorius muscle mechanically permeabilized by a scratching procedure, and we detected increments in calcium ...
    • Calcium Rules 
      Hidalgo Tapia, María Cecilia (Lippincott Williams and Wilkins, 2017)
    • Calcium signaling at the endoplasmic reticulum: fine-tuning stress responses 
      Carreras Sureda, Amado; Pihan, Philippe; Hetz Flores, Claudio (Elsevier, 2018)
      Endoplasmic reticulum (ER) calcium signaling is implicated in a myriad of coordinated cellular processes. The ER calcium content is tightly regulated as it allows a favorable environment for protein folding, in addition ...
    • Calcium signaling in insulin action on striated muscle 
      Contreras Ferrat, Ariel Eduardo; Lavandero González, Sergio; Jaimovich Pérez, Enrique; Klip, Amira (Churchill Livingstone, 2014)
      © 2014 Elsevier Ltd. Striated muscles (skeletal and cardiac) are major physiological targets of insulin and this hormone triggers complex signaling pathways regulating cell growth and energy metabolism. Insulin increases ...
    • Calcium transients in 1B5 myotubes lacking ryanodine receptors are related to inositol trisphosphate receptors 
      Estrada Hormazábal, Manuel; Cárdenas Matus, Julio; Liberona Leppe, José; Carrasco, María Angélica; Mignery, Gregory A.; Allen, Paul D.; Jaimovich Pérez, Enrique (Amer Soc Biochemistry Molecular Biology, 2001)
      Potassium depolarization of skeletal myotubes evokes slow calcium waves that are unrelated to contraction and involve the cell nucleus (Jaimovich, E., Reyes, R., Liberona, J. L., and Powell, J. A. (2000) Am. J. Physiol. ...
    • Calcium, iron and neuronal function 
      Hidalgo Tapia, María Cecilia; Núñez González, Marco (2007)
      Calcium and iron play dual roles in neuronal function: they are both essential but when present in excess they cause neuronal damage and may even induce neuronal death. Calcium signals are required for synaptic plasticity, ...
    • Calcium, Reactive Oxygen Species, and Synaptic Plasticity 
      Hidalgo Tapia, María Cecilia; Arias Cavieres, Alejandra (American Physiological Society, 2016-05)
      In this review article, we address how activity-dependent Ca2+ signaling is crucial for hippocampal synaptic/structural plasticity and discuss how changes in neuronal oxidative state affect Ca2+ signaling and synaptic ...