Browsing by Author "aa836d64-fe85-4352-bbb3-e230ed22d9cd"
Now showing items 1-20 of 25
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Liempi, Ana; Castillo Rivas, Christian; Medina, Lisvaneth; Galanti, Norbel; Maya Arango, Juan; Parraguez Gamboa, Víctor; Kemmerling Weis, Ulrike (Elsevier, 2020)Trypanosoma cruzi, the causative agent of Chagas disease, and Toxoplasma gondii, which is responsible for Toxoplasmosis, are two parasites that cause significant protozoan zoonoses and consequently important economic losses ...
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Day-night changes in c-fos expression in the fetal sheep suprachiasmatic nucleus at late gestation Constandil, L.; Parraguez Gamboa, Víctor; Torrealba, F.; Valenzuela, G.; Serón Ferré, María (1995)The suprachiasmatic nucleus (SCN) is a circadian oscillator in mammals and shows day-night changes in metabolic activity. To investigate whether the fetal sheep SCN behaves as a circadian oscillator, day-night changes in ...
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Parraguez Gamboa, Víctor; Sales, Francisco; Valenzuela, Guillermo J.; Vergara, Marcela; Catalán, Luis; Serón Ferré, María (1998)Penetration of light into the pregnant sheep uterus was studied in 9 ewes, gestational ages 40 to 142 days (term 147 days). Light Sensors were placed inside the pregnant horn and over the flank skin overlying the position ...
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Parraguez Gamboa, Víctor; Valenzuela, Guillermo J.; Vergara, Marcela; Ducsay, Charles A.; Yellon, Steven M.; Serón Ferré, María (Endocrine Society, 1996)A 24-h rhythm of plasma PRL is present in fetal sheep. This rhythm is synchronized to an environmental clue (zeitgeber). We determined whether the light-dark cycle (L:D) is a zeitgeber for the fetal PRL rhythm and, if ...
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González Bulnes, Antonio; Astiz, Susana; Parraguez Gamboa, Víctor; García Contreras, Consolación; Vázquez Gómez, Marta (2016)Fetal or intrauterine growth restriction (FGR or IUGR) is a concerning health issue not only due to its implications in mortality and morbidity of neonates but also because of its long-term consequences on health and disease ...
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Evaluation of cortical granules and viability of canine oocytes during long-term in vitro maturation Reyes Solovera, Mónica de los; Palomino Mackenney, Jaime; Sepúlveda, S.; Moreno, Ricardo D.; Parraguez Gamboa, Víctor; Barros, Claudio (BRITISH VETERINARY ASSOC, 2007-02-10)
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Palomino Mackenney, Jaime; Flores Becerra, Javiera; Ramírez Saboya, Georges; Parraguez Gamboa, Víctor; Reyes Solovera, Mónica de los (MDPI, 2021)The oestrous cycle in canines is specifically more extended than that in other mammals. This implies that the oocytes do not reach maturity within the ovarian follicle but undergo final maturation in the oviducts. Besides ...
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Sales, F.; Parraguez Gamboa, Víctor; McCoard, S.; Cofré, E.; Peralta Troncoso, Óscar; Subiabre, I. (American Society Animal Science, 2017)
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Reyes Solovera, Mónica de los; Palomino Mackenney, Jaime; Gallegos, Carola; Espinoza, Roberto; Dettleff Faúndes, Phillipe; Peralta Troncoso, Óscar; Parraguez Gamboa, Víctor; Ramírez, George (CSIRO, 2020)The aim of this study was to evaluate the expression of connexin (Cx) 37 and Cx43 in canine cumulus-oocyte complexes (COCs) during the oestrous cycle. Cx localisation was analysed by immunohistochemistry and immunofluorescence, ...
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Cofré Narbona, Eileen; Peralta Troncoso, Óscar; Urquieta Mangiola, Bessie; Raggi Saini, Luis; Benavides Aguila, Nataly; Parraguez Gamboa, Víctor (Universidad del Zulia Facultad de Ciencias Veterinarias, 2016)In males, most of the conditions leading to decreased fertility are associated with oxidative stress, where supra-physiological levels of reactive oxygen species exert detrimental effects on spermatogenesis and sperm ...
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Garcia, Pablo; Aspee, Karla; Ramirez, Georges; Dettleff, Phillip; Palomino, Jaime; Peralta, Oscar A.; Parraguez Gamboa, Víctor; Reyes Solovera, Mónica de los (Blackwell Publishing Ltd, 2019)© 2018 Blackwell Verlag GmbH Growth differentiation factor 9 (GDF-9) and bone morphogenetic protein 15 (BMP-15) have pivotal roles in oocyte development in many species, therefore the aim was to investigate these factors ...
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Sales, Francisco; Parraguez Gamboa, Víctor; Freitas de Melo, Aline; Ungerfeld, Rodolfo (Elsevier, 2020)Undernourishment is a frequent condition in sheep pregnancies under extensive systems, since most of the pregnancies occur when the prairie has the lowest forage allowance. Underfed sheep pregnancies are associated with ...
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Sales, Francisco; Peralta, Oscar A.; Narbona, Eileen; McCoard, Sue; Lira, Raúl; Reyes Solovera, Mónica de los; González Bulnes, Antonio; Parraguez Gamboa, Víctor (MDPI, 2019)Twinning and maternal nutritional restriction leads to fetal hypoxia, oxidative stress, and intrauterine growth restriction (IUGR) in near-term sheep pregnancies. Our aim was to determine the effect of oral supplementation ...
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Myogenic differentiation potential of mesenchymal stem cells derived from fetal bovine bone marrow Okamuraa, Lucas Hidenori; Cordero, Paloma; Palomino Mackenney, Jaime; Parraguez Gamboa, Víctor; Torres, Cristian Gabriel; Peralta Troncoso, Óscar (Taylor & Francis, 2018)The myogenic potential of bovine fetal MSC (bfMSC) derived from bone marrow (BM) remains unknown; despite its potential application for the study of myogenesis and its implications for livestock production. In the present ...
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Cordero, Paloma; Guerrero Moncayo, Alejandra; Reyes, Mónica de los; Varas Godoy, Manuel; Cortez, Jahaira; Torres, Cristian G.; Parraguez, Víctor H.; Peralta, Óscar A. (Frontiers Media, 2021)In vitro gamete derivation from stem cells has potential applications in animal reproduction as an alternative method for the dissemination of elite animal genetics, production of transgenic animals, and conservation of ...
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Ortiz, M. E.; Ortiz, R. E.; Fuentes, M. A.; Parraguez Gamboa, Víctor; Croxatto, Horacio B. (Oxford University Press, 2004)Background: Experimental evidence to disprove the belief that emergency contraception with levonorgestrel (LNG) prevents pregnancy by interfering with post-fertilization events is lacking. Here we determined the effect of ...
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Castro, Rodrigo; Morales Muñoz, Pamela; Parraguez Gamboa, Víctor (Elsevier, 2020)In this work, we investigated the influence of age and seasonality on sperm motility and DNA fragmentation in post-thawing semen from Chilean Purebred Stallions (CPS), a horse breed presenting the oldest genealogy record ...
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Cofré, E.; Peralta, O. A.; Raggi, A.; Reyes, Mónica de los; Sales, F.; González Bulnes, Antonio; Parraguez Gamboa, Víctor (Cambridge University Press, 2018)Ovine reproduction efficiency in herds at high altitude (ha) is lower than that at low altitude (la). In ewes, ha effects are due to hypoxia and oxidative stress. Our aim was to establish the effect of antioxidant vitamin ...
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Sales, Francisco; Peralta, Oscar A.; Narbona, Eileen; Mccoard, Sue; González Bulnes, Antonio; Parraguez Gamboa, Víctor (Oxford University Press, 2019)Fetal hypoxia, resulting in oxidative stress in pregnancies, contributes to reduced fetal growth. Melatonin, a potent antioxidant, has been associated with improved oxidative status. Maternal oral melatonin supplementation ...
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Reyes Solovera, Mónica de los; Palomino Mackenney, Jaime; Parraguez Gamboa, Víctor; Vergara Castillo, José (2012-12)Contents The objectives of this study were to evaluate the sperm nuclear decondensation capacity of ovulated and in vitro-matured (IVM) canine oocytes during different culture times and correlate this decondensation ability ...