Search Results - "Youngren, OM"

Dopamine and mesotocin neurotransmission during the transition from incubation to brooding in the turkey by Thayananuphat, A., Youngren, O.M., Kang, S.W., Bakken, T., Kosonsiriluk, S., Chaiseha, Y., El Halawani, M.E.

“…We investigated the neuroendocrine changes involved in the transition from incubating eggs to brooding of the young in turkeys. Numbers of mesotocin (MT; the…”
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Transcriptional changes in hypothalamic vasoactive intestinal peptide during a photo-induced reproductive cycle in the turkey by Chaiseha, Y, Tong, Z, Youngren, OM, El Halawani, ME

“…To characterize further vasoactive intestinal peptide (VIP) as the prolactin-releasing factor in avian species, the present study examined hypothalamic VIP…”
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Expression of Vasoactive Intestinal Peptide Receptor Messenger RNA in the Hypothalamus and Pituitary Throughout the Turkey Reproductive Cycle by CHAISEHA, Yupaporn, YOUNGREN, Orlan M, EL HALAWANI, Mohamed E

“…Vasoactive intestinal peptide (VIP) has been implicated in the regulation of avian reproductive activity and appears to act at the level of the hypothalamus…”
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Identification of Dopamine, Gonadotrophin-Releasing Hormone-I, and Vasoactive Intestinal Peptide Neurones Activated by Electrical Stimulation to the Medial Preoptic Area of the Turkey Hypothalamus: A Potential Reproductive Neuroendocrine Circuit by Al-Zailaie, K. A., Kang, S. W., Youngren, O. M., Thayananuphat, A., Bakken, T., Chaiseha, Y., Millam, J. R., Proudman, J. A., El Halawani, M. E.

“…The neural and neurochemical substrates regulating reproduction in birds remain vaguely defined. The findings that electrical stimulation in the medial…”
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Expression of Vasoactive Intestinal Peptide Receptor Messenger RNA in the Hypothalamus and Pituitary Throughout the Turkey Reproductive Cycle by Chaiseha, Y, Youngren, OM, El Halawani, ME

“…Vasoactive intestinal peptide (VIP) has been implicated in the regulation of avian reproductive activity and appears to act at the level of the hypothalamus…”
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Regulation of prolactin secretion by dopamine and vasoactive intestinal peptide at the level of the pituitary in the turkey by Youngren, O M, Chaiseha, Y, El Halawani, M E

“…This study investigated the capability of dopamine (DA) to prevent avian prolactin (PRL) secretion by antagonizing the PRL-releasing factor, vasoactive…”
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Influence of VIP on prolactinemia in turkey anterior pituitary cells: role of cAMP second messenger in VIP-induced prolactin gene expression by Kang, Seong W, Youngren, Orlan M, El Halawani, Mohamed E

“…Vasoactive intestinal peptide (VIP) is the avian prolactin (PRL)-releasing factor. In the turkey, hypothalamic VIP immunoreactivity and mRNA content, as well…”
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Immunohistochemical localization of chicken gonadotropin-releasing hormones I and II (cGnRH I and II) in turkey hen brain by Millam, J R, Faris, P L, Youngren, O M, el Halawani, M E, Hartman, B K

“…The distribution of cells and fibers immunoreactive (ir) for either chicken gonadotropin-releasing hormone I (cGnRH I; [Gln8]GnRH) or II ([His5,Trp7,Tyr8]GnRH)…”
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Dopaminergic Control of Prolactin Secretion in the Turkey by Youngren, Orlan M., Pitts, Gilbert R., Phillips, Richard E., El Halawani, Mohamed E.

“…The stimulatory and inhibitory effects of dopamine (DA) upon avian prolactin (PRL) secretion suggest that, in birds, these actions are mediated by multiple DA…”
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Serotonergic Stimulation of Avian Prolactin Secretion Requires an Intact Dopaminergic System by Youngren, Orlan M., Chaiseha, Yupaporn, El Halawani, Mohamed E.

“…In order to ascertain if prolactin (PRL) secretion stimulated by serotonin (5-HT) was mediated by the dopaminergic system, both dopamine (DA) and 5-HT were…”
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The stimulatory and inhibitory effects of dopamine on prolactin secretion in the turkey by Youngren, O M, Pitts, G R, Phillips, R E, el Halawani, M E

“…Dopamine (DA) was infused into the third ventricle of anesthetized laying turkey hens at various concentrations to determine its effect on both basal prolactin…”
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An opioid pathway in the hypothalamus of the turkey that stimulates prolactin secretion by Youngren, O M, Pitts, G R, Chaiseha, Y, El Halawani, M E

“…Circulating prolactin (PRL) levels increase when dynorphin is infused into the turkey brain. This study tested the hypothesis that centrally infused dynorphin…”
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Intracranial prolactin perfusion induces incubation behavior in turkey hens by YOUNGREN, O. M, EL HALAWANI, M. E, SILSBY, J. L, PHILLIPS, R. E

“…Intracranial perfusion of ovine prolactin (oPrl) via osmotic pump in laying turkey hens caused a sudden onset in incubation behavior, defined as an increase in…”
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Dopamine receptors influence vasoactive intestinal peptide release from turkey hypothalamic explants by Chaiseha, Y, Youngren, O M, el Halawani, M E

“…Vasoactive intestinal peptide (VIP) is a significant prolactin-releasing factor (PRF) in avian species, and dopamine (DA) exhibits both a stimulatory and…”
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Alterations in hypothalamic vasoactive intestinal peptide-like immunoreactivity are associated with reproduction and prolactin release in the female turkey by Mauro, L J, Elde, R P, Youngren, O M, Phillips, R E, el Halawani, M E

“…Vasoactive intestinal peptide (VIP) has potent PRL-releasing activity, but its physiological role in the regulation of PRL release during the avian…”
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Vasoactive intestinal peptide secretion by turkey hypothalamic explants by Chaiseha, Y. (University of Minnesota, St. Paul, MN.), Youngren, O.M, El Halawani, M.E

“…The objective of this study was to culture turkey hypothalami and examine vasoactive intestinal peptide (VIP) release during the turkey reproductive cycle. The…”
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Active immunization with vasoactive intestinal peptide prevents the secretion of prolactin induced by electrical stimulation of the turkey hypothalamus by Youngren, O M, Silsby, J L, Rozenboim, I, Phillips, R E, el Halawani, M E

“…Immunoneutralization of endogenous vasoactive intestinal peptide (VIP) by active immunization with chicken VIP (cVIP) reduced both basal circulating prolactin…”
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Effects of reproductive status, ovariectomy, and photoperiod on vasoactive intestinal peptide in the female turkey hypothalamus by Mauro, L J, Youngren, O M, Proudman, J A, Phillips, R E, el Halawani, M E

“…Vasoactive intestinal peptide (VIP) appears to be a physiologically relevant prolactin (PRL)-releasing factor during the avian reproductive cycle, yet little…”
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Photoperiod Mediates the Ability of Serotonin to Release Prolactin in the Turkey by Pitts, Gilbert R., Youngren, Orlan M., Phillips, Richard E., El Halawani, Mohamed E.

“…Photostimulation (PS) of turkeys increases the number of hypothalamic vasoactive intestinal peptide (VIP)-immunoreactive neurons, the number of anterior…”
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Serotonergic Stimulation of Prolactin Secretion Is Inhibited by Vasoactive Intestinal Peptide Immunoneutralization in the Turkey by El Halawani, M.E., Youngren, O.M., Rozenboim, J., Pitts, G.R., Silsby, J.L., Phillips, R.E.

“…The neuronal mechanisms that govern prolactin (PRL) secretion in the turkey appear to involve monoaminergic systems. Considerable evidence indicates that…”
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