Repositorio Académico de la Universidad de Chile: Recent submissions

Now showing items 43421-43440 of 101786

    • Use of hormone replacement therapy among Chilean women: A comparison between socioeconomic levels 
      Blümel, Juan E.; Castelo-Branco, Camil; Riquelme, Ruth; Araya, Hernán; Jaramillo, Pedro; Tacla, Ximena; Colodrón, Marta; Lavín, Pablo (2002)
      Objective: To compare the use of hormone replacement therapy (HRT) among Chilean women according to their socioeconomic level. Methods: A total of 540 women between 50 and 79 years of age were interviewed in Santiago, ...
    • Decentralization and equity of resource allocation: Evidence from Colombia and Chile 
      Bossert, Thomas J.; Larrañaga Jiménez, Osvaldo; Giedion, Ursula; Arbelaez, José Jesus; Bowser, Diana M. (2003)
      Objective: To investigate the relation between decentralization and equity of resource allocation in Colombia and Chile. Methods: The "decision space" approach and analysis of expenditures and utilization rates were used ...
    • Retroareolar cysts in the adolescent 
      Huneeus, Andrea; Schilling, Andrea; Horvath, Eleonora; Pinochet, Miguel; Carrasco, Oriana (Elsevier BV, 2003)
      Background: Retroareolar cysts present in female adolescents with palpable subareolar masses that can have concomitant inflammatory changes. The purpose of this study was to report our cases of retroareolar cysts and thus ...
    • Atropine reverses the antinociception of nonsteroidal anti-inflammatory drugs in the tail-flick test of mice 
      Pinardi,; Sierralta, Fernando; Miranda, Daniela (2003)
      The nonsteroidal anti-inflammatory drugs (NSAIDs) clonixin, diclofenac, piroxicam, ketoprofen, meloxicam, and paracetamol induced antinociception after intraperitoneal or intrathecal administration in mice submitted to an ...
    • The role of neuropeptide Y in the ovine fetal cardiovascular response to reduced oxygenation 
      Sanhueza, Emilia M.; Johansen-Bibby, Anja A.; Fletcher, A. J W; Riquelme, Raquel A.; Daniels, Alejandro J.; Serón Ferré, María; Gaete, Cristián R.; Carrasco, Jorge E.; Llanos Mansilla, Jorge; Giussani, Dino A. (2003)
      This study investigated the role of neuropeptide Y (NPY) in mediating cardiovascular responses to reduced oxygenation in the late gestation ovine fetus by: (1) comparing the effects on the cardiovascular system of an ...
    • Effect of associated bacteria on the growth and toxicity of Alexandrium catenella 
      Uribe, Paulina; Espejo Torres, Romilio (2003)
      Saprophytic bacteria in cultures of the marine dinoflagellate Alexandrium catenella were removed to assess their effect on growth and paralytic shellfish poisoning toxin production of this dinoflagellate. The actual axenic ...
    • Mt1 melatonin receptor in the primate adrenal gland: Inhibition of adrenocorticotropin-stimulated cortisol ... 
      Torres Farfán, Claudia; Richter, Hans G.; Rojas García, Pedro; Vergara, Marcela; Forcelledo, María Luisa; Valladares Boasi, Luis; Torrealba, Fernando; Valenzuela, Guillermo J.; Serón Ferré, María (2003)
      The pineal hormone melatonin participates in circadian, seasonal, and reproductive physiology. The presence of melatonin binding sites in human brain and peripheral tissues is well documented. However, in the mammalian ...
    • Antifeedant effects of marine halogenated monoterpenes 
      Argandoña, Victor H.; Rovirosa, Juana; San Martín Barrientos, Aurelio; Torres Riquelme, Alejandro; Díaz Marrero, Ana; Cueto, Mercedes; Darias, José; Santana, Omar; Guadaño, Ana; González-Coloma, Azucena (2002)
      In this work the antifeedant effects of the halogenated monoterpenes 1-13 were tested against several divergent insect species. These compounds have been isolated from Plocamium cartilagineum (6 was isolated as an acetyl ...
    • Genetic characterization and phylogeny of human T-cell lymphotropic virus type I from Chile 
      Ramirez, E.; Cartier Rovirosa, Luis; Villota, C.; Fernandez, J. (2002)
      Infection with Human T-Cell Lymphotropic Virus type I (HTLV-I) have been associated with the development of the HTLV-I associated myelopathy/tropical spastic paraparesis (HAM/TSP). Phylogenetic analyses of HTLV-I isolates ...
    • In vitro human plasma leucine5-enkephalin degradation is inhibited by a select number of drugs with the ... 
      Mosnaim, Aron D.; Puente, Javier; Saavedra, Rolando; Diamond, Seymour; Wolf, Marion E. (2003)
      A number of drugs with the phenothiazine molecule in their chemical structure inhibit in a dose-dependent manner human plasmatic aminopeptidase leucine5-enkephalin (LEU) metabolism. Half-life peptide degradation was ...
    • Human syndromes with genomic instability and multiprotein machines that repair DNA double-strand breaks 
      De La Torre, C.; Pincheira, J.; López-Sáez, J. F. (2003)
      The present report deals with the functional relationships among protein complexes which, when mutated, are responsible for four human syndromes displaying cancer proneness, and whose cells are deficient in DNA double-strand ...
    • A dorsal root ganglia cell line derived from trisomy 16 fetal mice, a model for Down syndrome 
      Allen, David D.; Cárdenas, Ana María; Arriagada, Christian; Bennett, Lori B.; García, Carlos J.; Caviedes, Ral; Rapoport, Stanley I.; Caviedes, Pablo (Lippincott Williams and Wilkins, 2002)
      We have established two immortalized cell lines from dorsal root ganglia of normal (G4b) and trisomy 16 mice (GTI), a model for Down syndrome. By immunohistochemistry, both cell lines exhibit neuronal traits and lack glial ...
    • Nicotinamide prevents the long-term effects of perinatal asphyxia on basal ganglia monoamine systems in the rat 
      Bustamante, D.; Goiny, M.; Åström, G.; Gross, J.; Andersson, K.; Herrera-Marschitz Muller, Mario (2003)
      Asphyxia during birth can cause gross brain damage, but also subtle perturbations expressed as biochemical or motor deficits with late onset in life. Thus, it has been shown that brain dopamine levels can be increased or ...
    • Effect of vitamin E (DL α-tocopherol) on chromosomal damage in lymphocytes from patients with ataxia ... 
      Marcelain Cubillos, Katherine; Luz Navarrete S, Carmen; Bravo L, Mireya; Santos A, Manuel; Be R, Cecilia; Pincheira V, Juana (2002)
      Background: In ataxia telangiectasia (A-T), the lack of a functional ATM kinase is associated with disturbances in the processing of DNA damage and a chronic oxidative stress. These disturbances may be responsible for an ...
    • Effect of melatonin on rat spinal cord nociceptive transmission 
      Laurido, Claudio; Pelissier Serrano, Teresa; Soto Moyano, Rubén; López Valladares, Luis; Flores, Francisco; Hernández, Alejandro (Lippincott Williams and Wilkins, 2002)
      Melatonin has been shown to exert potent antinociception but the sites and mechanisms of action underlying this effect have not yet been clarified. The effect of melatonin on spinal cord nociceptive transmission was studied ...
    • Alcohol, tobacco and breast cancer - Collaborative reanalysis of individual data from 53 epidemiological ... 
      Hamajima, N.; Hirose, K.; Tajima, K.; Rohan, T.; Calle, E. E.; Heath, C. W.; Coates, R. J.; Liff, J. M.; Talamini, R.; Chantarakul, N.; Koetsawang, S.; Rachawat, D.; Morabia, A.; Schuman, L.; Stewart, W.; Szklo, M.; Bain, C.; Schofield, F.; Siskind, V.; Band, P.; Coldm (Nature Publishing Group, 2002)
      Alcohol and tobacco consumption are closely correlated and published results on their association with breast cancer have not always allowed adequately for confounding between these exposures. Over 80% of the relevant ...
    • Annexin VI is attached to transverse-tubule membranes in isolated skeletal muscle triads 
      Barrientos, G.; Hidalgo, C. (2002)
      Annexin VI is a 68-kDa protein of the Annexin family, a group of Ca2+-dependent phospholipid-binding proteins widely distributed in mammalian tissues including skeletal muscle. We investigated a) which membrane system ...
    • Distribution of aquaporins in the colon of Octodon degus, a South American desert rodent 
      Gallardo, Pedro; Olea, Nancy; Sepúlveda, Francisco V. (2002)
      Octodon degus is a desert rodent of northern Chile, adapted to survive with a limited supply of water. This rodent has a high degree of fecal dehydration, related to colon water absorption. With the hypothesis that aquaporins ...
    • Vitamin E but not 17β-estradiol protects against vascular toxicity induced by β-amyloid wild type and the ... 
      Muñoz, Francisco J.; Opazo, Carlos; Gil-Gómez, Gabriel; Tapia, Gladys; Fernández, Virginia; Valverde, Miguel A.; Inestrosa, Nibaldo C. (2002)
      Amyloid β-peptide (Aβ) fibril deposition on cerebral vessels produces cerebral amyloid angiopathy that appears in the majority of Alzheimer's disease patients. An early onset of a cerebral amyloid angiopathy variant called ...
    • Structural features underlying the multisite phosphorylation of the a domain of the NF-AT4 transcription ... 
      Marin, Oriano; Burzio, Veronica; Boschetti, Marco; Meggio, Flavio; Allende, Catherine C.; Allende, Jorge E.; Pinna, Lorenzo A. (2002)
      The phosphorylation and dephosphorylation of the NF-AT family of transcription factors play a key role in the activation of T lymphocytes and in the control of the immune response. The mechanistic aspects of NF-AT4 ...