Browsing by Author "201-0010781"
Now showing items 41-60 of 77
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Fernandois, D.; Na, E.; Cuevas, F.; Cruz, G.; Lara Peñaloza, Hernán; Paredes Vargas, Alfonso (Bioscientifica, 2016)We have previously reported that kisspeptin (KP) may be under the control of the sympathetic innervation of the ovary. Considering that the sympathetic activity of the ovary increases with aging, it is possible that ...
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Fernandois, Daniela; Cruz, Gonzalo; Na, Eun Kyung; Lara Peñaloza, Hernán; Paredes, Alfonso (BioScientifica Ltd., 2017)Previous work has demonstrated that the increase in the activity of sympathetic nerves, which occurs during the subfertility period in female rats, causes an increase in follicular cyst development and impairs follicular ...
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Bernuci, Marcelo P.; Szawka, Raphael E.; Helena, Cleyde V. V.; Leite, Cristiane M.; Lara Peñaloza, Hernán; Anselmo Franci, Janete A. (ENDOCRINE SOC, 2008-06)Previous reports about the rat ovary have shown that cold stress promotes ovarian morphological alterations related to a polycystic ovary (PCO) condition through activation of the ovarian sympathetic nerves. Because the ...
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Boersma, G. J.; Bale, T. L.; Casanello, P.; Lara Peñaloza, Hernán; Lucion, A. B.; Suchecki, D.; Tamashiro, K. L. (British Society for Neuroendocrinology, 2014)This review discusses the effects of stress and nutrition throughout development and summarises studies investigating how exposure to stress or alterations in nutrition during the pre-conception, prenatal and early ...
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Maliqueo Yevilao, Manuel; Ángel Badillo, Bárbara; Pérez Bravo, Francisco; Lara Peñaloza, Hernán; Sir Petermann, Lidia (OXFORD UNIV PRESS, 2002-10)BACKGROUND: The aim of this study was to evaluate the peripheral serum androgen concentrations in normal and polycystic ovarian syndrome (PCOS) women during pregnancy, in order to establish if PCOS may induce gestational ...
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Barra, Rafael; Cruz Neculpán, Gonzalo Andrés; Mayerhofer, Artur; Paredes Vargas, Alfonso; Lara Peñaloza, Hernán (Society for Reproduction and Fertility, 2014)Chronic cold stress applied to adult rats activates ovarian sympathetic innervation and develops polycystic ovary (PCO) phenotype. The PCO syndrome in humans originates during early development and is expressed before or ...
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Medina, G.; Maliqueo Yevilao, Manuel; Crisosto King, Nicolás; Echiburú López, Bárbara; Sir Petermann, Lidia; Lara Peñaloza, Hernán (Verduci Publisher, 2017)OBJECTIVE: To evaluate the norepinephrine (NE) and placental NE transporter (NET) in women with polycystic ovary syndrome (PCOS) non-treated and treated with metformin during pregnancy. PATIENTS AND METHODS: We studied ...
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García Palomero, E.; Montiel, C.; Herrero, C. J.; García, A. G.; Alvarez, R. M.; Arnalich, F. M.; Renart, J.; Lara Peñaloza, Hernán; Cárdenas, A. M. (LIPPINCOTT WILLIAMS & WILKINS, 2000-03)Incubation of bovine adrenal chromaffin cells in high K+ (38 mM) during 24-48 h enhanced 2.5 to five times the expression of SNAP-25 protein and mRNA, respectively. This increase was reduced 86% by furnidipine 9(an L-type ...
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Martínez Pinto, Jonathan Eloy (Universidad de Chile, 2014)Reproduction is regulated through the integration of information that comes from the hypothalamus, hypophysis, and the ovary. There are critical hormone sensitive periods during development during which they are especially ...
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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, ...
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Sotomayor Zárate, Ramón; Tiszavari, Michelle; Cruz, Gonzalo; Lara Peñaloza, Hernán (2011)Objective: To investigate the hormones participating in early follicular development and hypothalamic neurotransmitters in rats during adulthood. Design: Experimental basic study. Setting: University animal laboratory. ...
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Salas, C.; Julio Pieper, Marcela; Valladares, M.; Pommer Téllez, Ricardo; Vega Blanco, María Margarita; Mastronardi, C.; Kerr, B.; Ojeda, Sergio R.; Lara Peñaloza, Hernán; Romero Osses, Carmen (ENDOCRINE SOC, 2006-06)Context: Previous studies showed that nerve growth factor (NGF) induces the expression of functional FSH receptors (FSHR) in preantral follicles of the developing rat ovary. Objective: The objective of this study was ...
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Mani, Shaila K.; Anselmo-Franci, Janete; Lara Peñaloza, Hernán; Suchecki, Deborah; Poletini, Maristela O.; Handa, Robert J.; John Wu, Tao-yiao (British Society for Neuroendocrinology, 2014)
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Ferruz, J.; Ahmed, C. E.; Ojeda, S. R.; Lara Peñaloza, Hernán (1992)Experiments were undertaken to study the role that neuropeptide-Y (NPY) and adrenergic autoreceptors may play in the regulation of norepinephrine (NE) release from the rat ovary. Ovaries from 28- to 32-day-old rats were ...
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Barria, A.; Leyton, V.; Ojeda, S. R.; Lara Peñaloza, Hernán (1993)Experimental induction of a polycystic ovarian syndrome (PCOS) in rodents by the administration of a single dose of estradiol valerate (EV) results in activation of the peripheral sympathetic neurons that innervate the ...
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Ricu Moya, Manuel Alejandro (Universidad de Chile, 2013-01)Kisspeptina es un péptido de 145 aa. el cual juega un rol clave en la secreción de GnRH, participando en conjunto con las catecolaminas en la regulación de la ovulación a nivel hipotalámico. La mayoría de las neuronas ...
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Julio Pieper, Marcela (Universidad de ChilePrograma Cybertesis, 2006)La formación de vasos sanguíneos a partir de otros preexistentes, o angiogénesis, es un proceso esencial en el desarrollo del tejido normal. La mayor parte de la angiogénesis fisiológica ocurre en la etapa embrionaria, y ...
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Lecocq Parra, Claudio; Fiedler, Jenny L.; Luna, S. Leticia; Greiner, Monika; Padmanabhan, Vasantha; Lara Peñaloza, Hernán (BioScientifica Ltd., 2007)Vasoactive intestinal polypeptide (VIP) stimulates estradiol and progesterone release from ovarian granulosa cells in vitro. Very little information is available as to the role VIP plays in the control of steroid secretion ...
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Maliqueo Yevilao, Manuel; Lara Peñaloza, Hernán; Sánchez, Fernando; Echiburú López, Bárbara; Crisosto King, Nicolás; Sir Petermann, Lidia (Elsevier, 2013)Objective: To evaluate the placental activity of steroid sulfatase (STS), 3b-hydroxysteroid dehydrogenase type 1 (3b-HSD-1) and P450 aromatase (P450arom) in polycystic ovarian syndrome (PCOS) compared to normal pregnant ...
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Yunes, Roberto; Estrella, Cecilia R.; García, Sebastián; Lara Peñaloza, Hernán; Cabrera, Ricardo (Hindawi, 2015)Ethanol consumption during pregnancy may induce profound changes in fetal CNS development. We postulate that some of the effects of ethanol on striatal glutamatergic transmission and neurotrophin expression could be ...