...Gisela Erika Pennacchio; Carolina Ayala; María Belén Sanchez; María Tamara Moreno-Sosa; Fiorella Campo-Verde-Arbocco; Graciela Alma Jahn; Susana Ruth Valdez; Marta Soaje Introduction: OFA hr/hr rats have deficient lactation with impaired suckling-induced PRL release. Unlike their background strain...

... with the increased energy and nutrient requirements for milk synthesis, thereby increasing their metabolic rate. Here we investigated in experiment 1 the regulation of plasma AEA and 2-AG concentrations during the transition from late pregnancy to early lactation in dairy cows, and analyzed in experiment 2...

...Fabiana C. Vilela; José Antunes-Rodrigues; Lucila L.K. Elias; Alexandre Giusti-Paiva Lactation is associated with profound behavioral and physiological adaptations in the mother that support reproductive success. These include neuroendocrine adaptation to stress that reduces anxiety-related...

.... The aim of the present study was to investigate the involvement of the NEDA system in the regulation of ACTH secretion and the participation of the IL in ACTH production in lactating rats. Untreated and estradiol (E 2 )-substituted ovariectomized (OVX) females were also studied. The concentration of ACTH...

... of lactating rats promoted the in vitro dose-related release of prolactin (PRL) from pituitary glands of male rats. In the present experiments we sought to determine whether CM from rats in different physiological states provoked similar effects (like those of lactating rats), and the nature of the factors...

...Flavio Mena; Dolores Aguayo; Pablo Pacheco; Maria Teresa Morales We injected, i.e., intracerebroventricularly (ICV) or systematically, small amounts of adrenaline (ADR), noradrenaline (NA), isoproterenol (ISOP) and dopamine (DA) in urethane-anesthetized lactating rats, and determined the effects...

... suckling is a potent stimulus for the secretion of these three hormones, we investigated the mediating role of neuronal histamine in suckling-induced release of oxytocin, PRL and ACTH in conscious lactating rats. The animals were pretreated with the histamine synthesis inhibitor α-fluoromethylhistidine...

...Jean-Rémi Pape; Gérard Tramu Hypothalamic neuropeptide Y (NPY) and proopiomelanocortin (POMC)-derived peptides located in the arcuate nucleus (ARC) have been postulated to be good candidates to play a modulatory role during lactation. In the present study, we first quantified, by in situ...

...Catherine M. Kotz; Allen S. Levine; Charles J. Billington Neuropeptide Y increases feeding and decreases measures of brown adipose tissue thermogenesis. In lactating rats, increased feeding, increased hypothalamic neuropeptide Y neuroactivity and decreased thermogenesis occur. Naltrexone...

...Maria Teresa Morales; Flavio Mena The possibility was investigated that centrally administered rat prolactin (PRL), i.e., intracerebroventricularly (ICV) or intrathecally (IT), may influence mammary contractility in urethane-anesthetized lactating rats. In addition to the monomer (23 kD PRL...

...Paul E. Micevych; Paul Popper; Glenn I. Hatton Toward the end of pregnancy, mammalian mothers undergo a cascade of hormonal, neural and somatic events that culminate in birth and lactation. Milk ejection, the final step in lactation, is regulated by high-frequency, synchronized firing...

... to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. γ-Aminobutyric acid γ-Aminobutyric acid receptors Baclofen Lactation Microdialysis Milk ejection Oxytocin Aminoacids, excitatory [Mteyir© -endocrinology Neuro...

... and AMPA-site agonists, or of NMDA and agonists active at the glycine coagonist site. The agonists were injected into the right SON, the right paraventricular nucleus (PVN), or into the third ventricle (3V) of nonsuckled lactating rats. Cotreatment with NMDA and AMPA (using doses that alone did not include...

... from any ideas, methods, instructions or products referred to in the content or advertisements. Thyrotropin-releasing hormone Posterior pituitary Thyroid Food deprivation Gonadal steroids Castration Disulfiram Lactation Neurohypophyseal Hormones Neurocndocrinology 1995;61:421-429 JanM.M...

...Zsuzsanna Bánky; György M. Nagy; Béla Halász It is well established that stress causes a rise in plasma prolactin (PRL) levels of male or cycling female rats. In lactating animals, the pituitary PRL response to stress is not well understood. Therefore, the purpose of the present study...

...Rula Abbud; Susan Smith We have used excitatory amino acids as tools to elucidate changes in hypothalamic function associated with lactation, focusing on the regulation of luteinizing hormone (LH) and prolactin secretion. In these studies, we have compared the responsiveness to NMA (N-methyl-D,L...

...Victoria Lux-Lantos; Pablo Hockl; Maria Tesone; Carlos Libertun The participation of adenohypophyseal estradiol receptors in the reinstatement of ovulatory cycles after lactation interruption was investigated. In rats whose pups were removed on day 13 postpartum (LRX), prolactin levels fell as from...

...Lesley Kehoe; Rebecca Parman; James Janik; Phyllis Callahan The prolactin secretory response to β-endorphin and the involvement of opiate receptor subtypes in this response was determined in both diestrous and postpartum, lactating female rats. The involvement of the µ-, δ- and/or ĸ-site...

...Ronald P. Hammer, Jr.; Annabelle R. Mateo; Robert S. Bridges Endogenous opioid peptides acting in the medial preoptic area (MPOA) appear to be involved in the regulation of maternal behavior in lactating rats. Moreover, it is known that the density of µ-opiate receptors in the MPOA is elevated...

...Takashi Higuchi; Kazumasa Honda; Shin Takano; Hideo Negoro There are data indicating that stress-induced prolactin (PRL) release is blunted in the lactating rat like the release of other stress-associated hormones. In this experiment, the PRL release evoked by administration of estrogen, which...