Search Results - "Proudman, J. A."

Gonadotrophin-Inhibitory Hormone Receptor Expression in the Chicken Pituitary Gland: Potential Influence of Sexual Maturation and Ovarian Steroids by Maddineni, S., Ocón-Grove, O. M., Krzysik-Walker, S. M., Hendricks III, G. L., Proudman, J. A., Ramachandran, R.

“…Gonadotrophin‐inhibitory hormone (GnIH), a hypothalamic RFamide, has been found to inhibit gonadotrophin secretion from the anterior pituitary gland originally…”
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Lack of effects of atrazine on estrogen-responsive organs and circulating hormone concentrations in sexually immature female Japanese quail ( Coturnix coturnix japonica) by Wilhelms, K.W., Cutler, S.A., Proudman, J.A., Carsia, R.V., Anderson, L.L., Scanes, C.G.

“…The widely used herbicide, atrazine, has been reported to exhibit reproductive toxicity in rats and amphibians. The present studies investigate toxicity of…”
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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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Effects of body weight and feed allocation during sexual maturation in broiler breeder hens. 2. Ovarian morphology and plasma hormone profiles by Renema, R A, Robinson, F E, Proudman, J A, Newcombe, M, McKay, R I

“…The effects of broiler breeder BW and nutrient intake on ovary morphology and plasma reproductive hormone profiles were examined at photostimulation (PS) (21…”
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Effect of Heat Stress on Ovarian Function of Laying Hens by Rozenboim, I, Tako, E, Gal-Garber, O, Proudman, J.A, Uni, Z

“…Reproductive failure associated with heat stress is a well-known phenomenon. The mechanism involved in this failure is not clearly understood. In order to test…”
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Immunohistochemical evidence that follicle-stimulating hormone and luteinizing hormone reside in separate cells in the chicken pituitary by Proudman, J.A, Vandesande, F, Berghman, L.R

“…As is the case in other tetrapod species, the chicken gonadotropins LH and FSH consist of a common α subunit and a hormone-specific β subunit. Gonadotrophs…”
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Thyroid hormone and prolactin profiles in male and female turkeys following photostimulation by Proudman, J A, Siopes, T D

“…The turkey hen, a photosensitive bird, will become photorefractory (PR) during the reproductive cycle and will cease laying despite a stimulatory day length…”
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Relative and absolute photorefractoriness in turkey hens: profiles of prolactin, thyroxine, and triiodothyronine early in the reproductive cycle by Proudman, J A, Siopes, T D

“…An experiment was conducted to determine whether a commercial strain of turkey hens exhibits relative photorefractoriness (rPR) during a reproductive cycle and…”
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Increased Proliferative Activity and Programmed Cellular Death in the Turkey Hen Pituitary Gland Following Interruption of Incubation Behavior by RAMESH, R, KUENZEL, W. J, PROUDMAN, J. A

“…Incubation behavior or broodiness in turkey hens is characterized by ovarian regression, hyperprolactinemia, and persistent nesting. Nest-deprivation of…”
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Modulation of in vitro DNA synthesis in the chicken ovarian granulosa cell follicular hierarchy by follicle-stimulating hormone and luteinizing hormone by McElroy, A.P, Caldwell, D.J, Proudman, J.A, Hargis, B.M

“…Folliculogenesis in domestic hens appears to be controlled by numerous factors, particularly the gonadotropins, luteinizing hormone (LH) and…”
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Effect of a single short-term reduction in photoperiod on photorefractoriness in turkey hens by Proudman, J.A, Siopes, T.D

“…In a prior study, we reported that a high proportion of hens in a winter-laying flock became relatively photorefractory (rPR) early in the reproductive cycle…”
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Identification of growth-hormone- and prolactin-containing neurons within the avian brain by Ramesh, R, Kuenzel, W J, Buntin, J D, Proudman, J A

“…Prolactin (PRL)- and growth-hormone (GH)-containing perikarya and fibers independent of the anterior pituitary gland have been reported to exist in the central…”
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Photoresponsiveness of turkey breeder hens changes during the egg-laying season: relative and absolute photorefractoriness by Siopes, T.D, Proudman, J.A

“…Photosensitive species undergo neuroendocrine changes during a reproductive season that cause them to gradually become unresponsive to a photoperiod that…”
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Endocrine Patterns during Aging in the Common Tern (Sterna hirundo) by Nisbet, I.C.T, Finch, C.E, Thompson, N, Russek-Cohen, E, Proudman, J.A, Ottinger, M.A

“…Blood samples were taken from breeding common terns (Sterna hirundo) of known age during two successive breeding seasons to determine if plasma concentrations…”
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Sulfamethazine advances puberty in male chicks by effecting a rapid increase in gonadotropins by Kuenzel, W.J., Abdel-Maksoud, M.M., Elsasser, T., Proudman, J.A.

“…A sulfonamide, sulfamethazine (SMZ) has been shown to have a robust, progonadal effect. The mechanism of action of SMZ, however, is unknown. Our hypothesis is…”
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Vasoactive intestinal peptide stimulates prolactin mRNA expression in turkey pituitary cells: effects of dopaminergic drugs by Xu, M, Proudman, J A, Pitts, G R, Wong, E A, Foster, D N, el Halawani, M E

“…It is well documented that vasoactive intestinal peptide (VIP) is a prolactin (PRL)-releasing factor and that dopamine (DA) is an inhibitory neurotransmitter…”
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Immunohistochemical localization of chromogranin A in gonadotrophs and somatotrophs of the turkey and chicken pituitary by Proudman, J.A., Clerens, S., van den Bergh, G., Garrett, W.M., Verhaert, P.D., Vandesande, F., Berghman, L.R.

“…In the course of producing monoclonal antibodies to turkey prolactin, three monoclonal antibodies to turkey chromogranin A (CgA) were also produced, apparently…”
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FSH- and LH-cells originate as separate cell populations and at different embryonic stages in the chicken embryo by Puebla-Osorio, N, Proudman, J.A, Compton, A.E, Clements, K.E, Decuypere, E, Vandesande, F, Berghman, L.R

“…The histological distribution of gonadotrophs containing either LH or FSH, but not both gonadotropins, has been demonstrated before in the juvenile and adult…”
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Development of an homologous radioimmunoassay for chicken follicle-stimulating hormone and measurement of plasma FSH during the ovulatory cycle by Krishnan, K A, Proudman, J A, Bolt, D J, Bahr, J M

“…1. A highly specific and sensitive homologous radioimmunoassay was developed for measurement of chicken follicle stimulating hormone (cFSH). 2. Mammalian…”
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Purification and partial characterization of isoforms of luteinizing hormone from the chicken pituitary gland by Krishnan, K A, Proudman, J A, Bahr, J M

“…Isoforms of chicken luteinizing hormone (cLH) were isolated from chicken pituitaries by differential extraction, sequential chromatography on HPLC cation- and…”
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