Search Results - "Fehrer, S C"

Hormonal induction of incubation behavior in ovariectomized female turkeys (Meleagris gallopavo) by EL HALAWANI, M. E, SILSBY, J. L, BEHNKE, E. J, FEHRER, S. C

“…Two experiments were conducted to evaluate the effect of estradiol benzoate (EB), progesterone (P), ovine prolactin (oPrl), or their combinations on temporal…”
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Ovarian steroid production in vitro during gonadal regression in the turkey. II. Changes induced by forced molting by PORTER, T. E, SILSBY, J. L, HARGIS, B. M, FEHRER, S. C, EL HALAWANI, M. E

“…In the turkey, the onset of incubation behavior is associated with altered ovarian steroidogenesis, ovarian regression, decreased, LH secretion, and increased…”
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Effect of ambient temperature on serum prolactin and luteinizing hormone levels during the reproductive life cycle of the female turkey (Meleagris gallopavo) by El-Halawani, M.E, Silsby, J.L, Behnke, E.J, Fehrer, S.C

“…An ambient temperature of 30 degrees C compared to 18 degrees C accelerated the increase in serum prolactin (Prl) level induced by photostimulation of female…”
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Basal and hypothalamic extract-induced luteinizing hormone and prolactin secretion by cultured anterior pituitary cells from female turkeys in various stages of the reproductive cycle by el Halawani, M E, Silsby, J L, Fehrer, S C

“…The wet weight of the anterior pituitary gland of the domestic turkey increases as the hen progresses through the reproductive cycle. The greatest wet weight…”
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Gonadal steroid modulation of basal and vasoactive intestinal polypeptide-stimulated prolactin release by turkey anterior pituitary cells by Knapp, T R, Fehrer, S C, Silsby, J L, Porter, T E, Behnke, E J, el Halawani, M E

“…Porcine vasoactive intestinal polypeptide (VIP; 10(-9) to 10(-7) M) was a potent stimulator of prolactin (PRL) release by anterior pituitary cells from…”
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Enhanced luteinizing hormone release by luteinizing hormone-releasing hormone in incubating female turkeys (Meleagris gallopavo) by El Halawani, M.E, Fehrer, S.C, Silsby, J.L

“…To determine what role pituitary responsiveness plays in the suppression of gonadotropin level during incubation in the turkey, the ability of the pituitary to…”
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Reinitiation of ovulatory cycles in incubating female turkeys by an inhibitor of serotonin synthesis, p-chlorophenylalanine by El Halawani, M.E, Silsby, J.L, Fehrer, S.C, Behnke, E.J

“…Nest deprivation of incubating turkeys caused a decrease in serum prolactin (Prl) levels from 1184.5 +/- 116.4 ng/ml to 896.8 +/- 83.0 ng/ml 1 day after…”
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Serotonergic influences on pituitary gland and hypothalamic induction of prolactin and luteinizing hormone release in the young turkey (Meleagris gallopavo) by FEHRER, S. C, SILSBY, J. L, EL HALAWANI, M. E

“…Primary anterior pituitary cell cultures were utilized to study the influence of serotonin (5-HT) directly on the pituitary. Cells incubated with 10(-5) and…”
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Effects of estrogen and progesterone on serum prolactin and luteinizing hormone levels in ovariectomized turkeys (Meleagris gallopavo) by El Halawani, M E, Silsby, J L, Fehrer, S C, Behnke, E J

“…Serum prolactin (PRL) and luteinizing hormone (LH) levels from mature female turkeys were determined following ovariectomy and daily subcutaneous injections…”
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Cytosolic progesterone receptors in the oviducts of reproductively active and quiescent turkeys (Meleagris gallopavo) by Yu, W.C.Y, El Halawani, M.E, Fehrer, S.C, Leung, B.S

“…Cytosolic progesterone receptors (PRcs) from the reproductive tract of the female turkey were analyzed by high-performance liquid chromatography using a…”
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The influence of acute or repeated immobilization on plasma prolactin levels in the turkey (Meleagris gallopavo) by el Halawani, M E, Silsby, J L, Fehrer, S C, Behnke, E J

“…Three experiments were conducted to evaluate the effect of immobilization on plasma prolactin (PRL) levels in the immature turkey. Acute immobilization for 120…”
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Hypothalamic and serum factors influence on prolactin and luteinizing hormone release by the pituitary gland of the young turkey (Meleagris gallopavo) by Fehrer, S C, Silsby, J L, Behnke, E J, el Halawani, M E

“…Intravenous administration of 1.0 or 3.0 eq hypothalamic extract (HE) to 8-week-old male and 7-week-old female turkeys, respectively, induced an increase in…”
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Gonadal steroid-mediated alteration of luteinizing hormone secretion by anterior pituitary cells of young turkeys by Knapp, T R, Fehrer, S C, Silsby, J L, Porter, T E, Behnke, E J, el Halawani, M E

“…The magnitude of luteinizing hormone (LH) release during a 3-hr test incubation was diminished (P less than 0.05) when anterior pituitary cells from young…”
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Serotonergic stimulation of prolactin release in the young turkey (Meleagris gallopavo) by Fehrer, S C, Silsby, J L, El Halawani, M E

“…Serum prolactin (PRL) levels were determined by homologous radioimmunoassay in 6- to 10-week-old domestic white turkeys treated by intraperitoneal injection of…”
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Inhibitory influence of catecholamines on prolactin release in the turkey (Meleagris gallopavo) by El Halawani, M E, Silsby, J L, Fehrer, S C, Behnke, E J

“…The involvement of catecholamines (CAs) in the control of prolactin (PRL) secretion was investigated in female turkeys. The birds were treated with…”
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The influence of thyrotropin releasing hormone on in vivo prolactin release and in vitro prolactin, luteinizing hormone, and growth hormone release from dispersed pituitary cells of the young turkey (Meleagris gallopavo) by Fehrer, S C, Silsby, J L, Behnke, E J, el Halawani, M E

“…Intravenous administration of 0.025, 0.25, or 2.5 micrograms/kg thyrotropin releasing hormone (TRH) to 4-week-old female turkeys induced a dose-dependent…”
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5-azacytidine-induced increase in plasma prolactin levels of immature turkeys by Fehrer, S C, Silsby, J L, el Halawani, M E, Guise, K S

“…Immature female turkeys (7 wk old) were treated with 5-azacytidine, a cytidine analog that has been shown to inhibit cytosine methylation in eukaryotic DNA…”
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Regulation of prolactin and its role in gallinaceous bird reproduction by El Halawani, M E, Burke, W H, Millam, J R, Fehrer, S C, Hargis, B M

“…There are major changes in circulating luteinizing hormone (LH), prolactin (PRL), estrogens (E), and progesterone (P) in relation to the onset of reproduction,…”
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The influence of pharmacological manipulation of serotonin on serum growth hormone and luteinizing hormone levels in young turkeys (Meleagris gallopavo) by Fehrer, S C, Silsby, J L, Burke, W H, el Halawani, M E

“…Serum growth hormone (GH) and luteinizing hormone (LH) levels were determined by homologous radioimmunoassay in 8 to 10-week-old domestic white turkeys treated…”
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Cyproheptadine stimulated prolactin release in the young turkey (Meleagris gallopavo) by Fehrer, S C, Silsby, J L, el Halawani, M E

“…Cyproheptadine (CHD) at doses of .1 to 10.0 mg/kg body weight produced a dose-related elevation in prolactin (PRL) and no change in luteinizing hormone (LH)…”
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