Contents The aim of this study was to compare the effect of the intramuscular administration of 50g of gonadorelin acetate versus natural mating, intrauterine infusion (i.u.) of a physiological relevant dose of either raw llama seminal plasma (SP) or purified beta-nerve growth factor from seminal...
Silva Jiménez, Mauricio
,
Urra, F.
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Ulloa-Leal, C.
,
Ratto, Marcelo
,
[A comparative study of the effects of intramuscular administration of gonadorelin, mating and intrauterine infusion of either raw seminal plasma or seminal plasma purified -NGF on luteal development in llamas]
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A comparative study of the effects of intramuscular administration of gonadorelin, mating and intrauterine infusion of either raw seminal plasma or seminal plasma purified -NGF on luteal development in llamas
The objectives of this study were (1) to determine the effect of rabbit seminal plasma on LH secretion and ovulation using the llama animal model as an in vivo ovulation bioassay and (2) to determine the effect of llama or rabbit seminal plasma on ovulation induction in the rabbit model. In Exper...
Silva Jiménez, Mauricio
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Nino, A.
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Guerra, M.
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Letelier, C.
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Valderrama, X. P.
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Adams, G. P.
,
Ratto, Marcelo
,
[Is an ovulation-inducing factor (OIF) present in the seminal plasma of rabbits?]
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Is an ovulation-inducing factor (OIF) present in the seminal plasma of rabbits?
The type of stimuli triggering GnRH secretion has been used to classify mammalian species into two categories: spontaneous or induced ovulators. In the former, ovarian steroids produced by a mature follicle elicit the release of GnRH from the hypothalamus, but in the latter, GnRH secretion requir...
Ratto, Marcelo H.
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Berland Olea, Marco
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Silva Jiménez, Mauricio
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Adams, Gregg P.
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[New insights of the role of beta-NGF in the ovulation mechanism of induced ovulating species]
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New insights of the role of beta-NGF in the ovulation mechanism of induced ovulating species
Llamas are considered to be reflex ovulators. However, semen from these animals is reported to be rich in ovulation-inducing factor(s), one of which has been identified as nerve growth factor (NGF). These findings suggest that ovulation in llamas may be elicited by chemical signals contained in s...
Berland Olea, Marco
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Ulloa Leal, Cesar
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Barria, Miguel
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Wright, Hollis
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Dissen, Gregory A.
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Silva Jiménez, Mauricio
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Ojeda, Sergio R.
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Ratto, Marcelo H.
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[Seminal Plasma Induces Ovulation in Llamas in the Absence of a Copulatory Stimulus: Role of Nerve Growth Factor as an Ovulation-Inducing Factor]
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Seminal Plasma Induces Ovulation in Llamas in the Absence of a Copulatory Stimulus: Role of Nerve Growth Factor as an Ovulation-Inducing Factor
Post thawing in vitro maturation rate was evaluated for partially matured vitrified oocytes from Chilean Red Friesian cattle. Cumulus-Oocytes Complexes were obtained by follicular aspiration, classified by morphology and randomly in vitro matured in TCM199 (10 % Bovine Fetal Serum (BFS), 50 mg/mL...
Silva Jiménez, Mauricio
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Calderon, N.
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[Vitrification of Partially Matured Bovine Oocytes of the Chilean Red Friesian Breed]
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Vitrification of Partially Matured Bovine Oocytes of the Chilean Red Friesian Breed
The objective of this study was to determine the effect of leptin administration on the development, vascularization and function of Corpus luteum (CL) in alpacas submitted to pre-ovulatory fasting. Fourteen alpacas were kept in fasting conditions for 72 h and received five doses of o-leptin (2 m...
Cecilia Norarnbuena, Maria
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Hernandez, Francisca
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Maureira, Jonathan
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Rubilar, Carolina
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Alfaro, Jorge
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Silva, Gonzalo
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Silva Jiménez, Mauricio
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Ulloa-Leal, Cesar
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[Effects of leptin administration on development, vascularization and function of Corpus luteum in alpacas submitted to pre-ovulatory fasting]
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Effects of leptin administration on development, vascularization and function of Corpus luteum in alpacas submitted to pre-ovulatory fasting
Gonadotrophin releasing hormone (GnRH) is commonly used in llamas to induce ovulation; however, the consequence of reduced doses of GnRH on luteinizing hormone (LH) release, ovulatory response, and subsequent corpus luteum (CL) development and function have apparently not been investigated. Hence...
Silva Jiménez, Mauricio
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Colazo, M. G.
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Ratto, Marcelo
,
[GnRH dose reduction decreases pituitary LH release and ovulatory response but does not affect corpus luteum (CL) development and function in llamas]
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GnRH dose reduction decreases pituitary LH release and ovulatory response but does not affect corpus luteum (CL) development and function in llamas
The ovulation-inducing effect of seminal plasma was first suggested in Bactrian camels over 30 years ago, initiating a long search to identify the 'ovulation-inducing factor' (OIF) present in camelids semen. During the last decade, primarily in llamas and alpacas, this molecule has been intensive...
Silva Jiménez, Mauricio
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Paiva, Luis
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Ratto, Marcelo H.
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[Ovulation mechanism in South American Camelids: The active role of beta-NGF as the chemical signal eliciting ovulation in llamas and alpacas]
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Ovulation mechanism in South American Camelids: The active role of beta-NGF as the chemical signal eliciting ovulation in llamas and alpacas
Norambuena, M. C.
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Silva Jiménez, Mauricio
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Urra, F.
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Ulloa Leal, C.
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Letelier, C.
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Fernandez, A.
,
Adams, G. P.
,
Ratto, Marcelo
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[EFFECTS OF LONG-TERM NUTRITIONAL RESTRICTION ON PREOVULATORY LUTEINIZING HORMONE SURGE, LEPTIN, AND LUTEAL PHASE IN LLAMAS (LAMA GLAMA)]
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EFFECTS OF LONG-TERM NUTRITIONAL RESTRICTION ON PREOVULATORY LUTEINIZING HORMONE SURGE, LEPTIN, AND LUTEAL PHASE IN LLAMAS (LAMA GLAMA)
The ovulation-inducing effect of seminal plasma was first reported in Bactrian camels over 30 years ago, and the entity responsible was dubbed 'ovulation-inducing factor' (OIF). More recent studies, primarily in llamas and alpacas, characterized the biological and chemical properties of OIF and u...
Adams, G. P.
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Ratto, Marcelo
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Silva Jiménez, Mauricio
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Carrasco, R. A.
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[Ovulation-inducing factor (OIF/NGF) in seminal plasma: a review and update]
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Ovulation-inducing factor (OIF/NGF) in seminal plasma: a review and update