Browsing by Author "Paredes Vargas, Alfonso"

Now showing items 1-9 of 9

    • Adrenalectomy regulates apoptotic-associated genes in rat hippocampus 
      Greiner Gebauer, Monika Marcela; Cárdenas Muñoz, Sergio Patricio; Parra, C.; Bravo, Jaime F.; Avalos, Ana María; Paredes Vargas, Alfonso; Lara Peñaloza, Hernán; Fiedler Temer, Jenny (HUMANA PRESS INC, 2001-08)
      Morphological studies of granular neurons of the hippocampus have shown that adrenalectomy (ADX) induces the cell death of granular neurons, an effect prevented by corticosterone replacement. We addressed the hypothesis ...
    • Catecholamine uptake, storage, and regulated release by ovarian granulosa cells 
      Greiner, Monika; Paredes Vargas, Alfonso; Rey Ares, Verónica; Saller, Sabine; Mayerhofer, Artur; Lara Peñaloza, Hernán (ENDOCRINE SOC, 2008-10)
      Catecholamines present in the mammalian ovary are involved in many normal aspects of ovarian functions, including initial follicle growth, steroidogenesis, and pathological states such as polycystic ovary syndrome. Sympathetic ...
    • An increased intraovarian synthesis of nerve growth factor and its low affinity receptor is a principal ... 
      Lara Peñaloza, Hernán; Dissen, G. A.; Leyton Canales, Víctor; Paredes Vargas, Alfonso; Fuenzalida Cruz, Héctor; Fiedler Temer, Jenny; Ojeda, Sergio R. (ENDOCRINE SOC, 2000-03)
      A form of polycystic ovary (PCO) resembling some aspects of the human PCO syndrome can be induced in rats by a single injection of estradiol valerate (EV). An increase in sympathetic outflow to the ovary precedes, by several ...
    • Loss of synaptonemal complex protein-1, a synaptonemal complex protein, contributes to the initiation of ... 
      Paredes Vargas, Alfonso; García Rudaz, C.; Kerr, B.; Tapia, V.; Dissen, G. A.; Costa, M. E.; Cornea, A.; Ojeda, Sergio R. (ENDOCRINE SOC, 2005-12)
      In the rat ovary, germ and somatic cells become organized into primordial follicles 48-72 h after birth. Although several genes have been implicated in the control of early follicular growth, less is known about the factors ...
    • Neonatal Exposure to Estradiol Valerate Programs Ovarian Sympathetic Innervation and Follicular Development ... 
      Sotomayor Zárate, Ramón; Dorfman, Mauricio; Paredes Vargas, Alfonso; Lara Peñaloza, Hernán (SOC STUDY REPRODUCTION, 2008-04)
      A single injection of estradiol valerate (EV) to 14-day-old rats (when the ovarian follicle population has been already established) disrupts cyclicity, increases the activity of key enzymes of androgen biosynthesis, ...
    • Neurotrophic control of ovarian development 
      Dissen, G. A.; Romero Osses, Carmen; Paredes Vargas, Alfonso; Ojeda, Sergio R. (WILEY-LISS, DIV JOHN WILEY & SONS INC, 2002-12-15)
      Substantial evidence now exists indicating that the neurotrophins, a family of growth factors required for the survival, development, and differentiation of various neuronal populations of the nervous system, are also ...
    • Role of stress and sympathetic innervation in the development of polycystic ovary syndrome 
      Greiner Gebauer, Monika Marcela; Paredes Vargas, Alfonso; Araya, Verónica; Lara Peñaloza, Hernán (HUMANA PRESS INC, 2005-12)
      This article presents a review of the role of the sympathetic activity in ovarian pathologies affecting reproductive function. We provide a succinct outline of the findings of our group in this area. The participation of ...
    • Stress promotes development of ovarian cysts in rats - The possible role of sympathetic nerve activation 
      Paredes Vargas, Alfonso; Gálvez, Anita; Leyton Canales, Víctor; Zúñiga Aravena, Gabriel; Fiedler Temer, Jenny; Bustamante Cádiz, Diego; Lara Peñaloza, Hernán (HUMANA PRESS INC, 1998-06)
      The ovarian content of neuropeptide Y (NPY) (colocalized with NE) was significantly decreased. These results suggest that NE synthesis and its secretion are increased during this period and correlate with the increase in ...
    • TrkB receptors are required for follicular growth and oocyte survival in the mammalian ovary (vol 267, pg ... 
      Paredes Vargas, Alfonso; Romero Osses, Carmen; Dissen, G. A.; DeChiara, T. M.; Reichardt, L.; Cornea, A.; Ojeda, Sergio R.; Xu, B. J. (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2004-06-01)
      Although it is well established that both follicular assembly and the initiation of follicle growth in the mammalian ovary occur independently of pituitary hormone support, the factors controlling these processes remain ...