The drop in plasma thyrotropin concentrations in fasted chickens is caused by an action at the level of the hypothalamus: role of corticosterone

Harris, 1978, Effect of starvation on hypothalamo-pituitary-thyroid function in the rat, Metabolism, 27, 1074, 10.1016/0026-0495(78)90153-1 Klandorf, 1985, Food intake regulation of circulating thyroid hormones in domestic fowl, Gen Comp Endocrinol, 60, 162, 10.1016/0016-6480(85)90310-7 Kühn, 1996, The use of intermittent lighting in broiler raising: 2. Effects on the somatotrophic and thyroid axes and on plasma testosterone levels, Poult Sci, 75, 595, 10.3382/ps.0750595 Darras, 1995, Partial food restriction increases hepatic ring deiodination activity in the chicken and the rat, Gen Comp Endocrinol, 100, 334, 10.1006/gcen.1995.1164 van Haasteren, 1995, Starvation-induced changes in hypothalamic content of pro-thyrotropin-releasing hormone (proTRH) mRNA and the hypothalamic release of proTRH-derived peptides, J Endocrinol, 145, 143, 10.1677/joe.0.1450143 Berghman, 1993, Immunocytochemical demonstration of chicken hypophyseal thyrotropes and development of a radioimmunological indicator for chicken TSH using monoclonal and polyclonal homologous antibodies in a subtractive strategy, Gen Comp Endocrinol, 92, 189, 10.1006/gcen.1993.1155 Geris, 1995, Influence of corticotrophin-releasing factor on the in vitro thyroxine and thyrotropin secretion in newly hatched fowl, Belg J Zool, 125, 143 Geris, 1996, Evidence of a thyrotropin-releasing activity of ovine corticotropin-releasing factor in the domestic fowl (Gallus domesticus), Gen Comp Endocrinol, 104, 139, 10.1006/gcen.1996.0156 Geris, 1998, Pre- and postnatal developmental changes in thyrotropin-releasing hormone and somatostatin content and in circulating GH and thyrotropin concentration in the chicken, J Endocrinol, 159, 219, 10.1677/joe.0.1590219 Darras, 1996, Plasma thyroid hormone levels and iodothyronine deiodinase activity following an acute glucocorticoid challenge in embryonic compared with posthatch chickens, Gen Comp Endocrinol, 104, 203, 10.1006/gcen.1996.0163 Geris, 1998, Pituitary and extrapituitary action sites of the novel nonpeptidyl growth hormone (GH) secretagogue, L-692,429, in the chicken, Gen Comp Endocrinol, 111, 186, 10.1006/gcen.1998.7102 Kühn, 1987, A comparison between the thyrotrophic and peripheral activities of thyrotrophin and thyrotrophin-releasing hormone in the chick embryo and adult chicken, Med Sci Res, 15, 431 Rondeel, 1992, Effect of starvation and subsequent refeeding on thyroid function and release of thyrotropin-releasing hormone in rats, Neuroendocrinology, 56, 348, 10.1159/000126248 Legradi, 1997, Leptin prevents fasting-induced suppression of prothyrotropin-releasing hormone messenger ribonucleic acid in neurons of the hypothalamic paraventricular nucleus, Endocrinology, 138, 2569, 10.1210/en.138.6.2569 Darras, 1991, Food intake after hatching inhibits the growth hormone induced stimulation of the thyroxine to triiodothyronine conversion in the chicken, Horm Metabol Res, 23, 469, 10.1055/s-2007-1003731 Darras, 1992, Ontogeny of type I and type III deiodinase activities in embryonic and posthatch chicks, Comp Biochem Physiol, 103A, 131, 10.1016/0300-9629(92)90252-L Abdel–Fattah, 1991, Serum patterns of thyroxine (T4), 3,3′,5-triiodothyronine (T3) and 3,3′,5′-triiodothyronine (rT3) in fed and fasted cocks following TRH stimulation, Zentralbl Veterinarmed, 38, 401, 10.1111/j.1439-0442.1991.tb01028.x Kühn, 1991, Thyrotropin-releasing hormone (TRH) is not thyrotropic but somatotropic in fed and starved adult chickens, Reprod Nutr Dev, 31, 431, 10.1051/rnd:19910409 Campbell, 1977, Effects of starvation in rats on serum levels of follicle stimulating hormone, luteinizing hormone, thyrotropin, growth hormone and prolactin, Endocrinology, 100, 580, 10.1210/endo-100-2-580 Hugues, 1986, Sensitivity of thyrotropin (TSH) secretion to 3,5,3′-triiodothyronine and TSH-releasing hormone in rat during starvation, Endocrinology, 119, 253, 10.1210/endo-119-1-253 Lim, 1994, Transport of thyroxine into cultured hepatocytes, Clin Endocrinol, 40, 79, 10.1111/j.1365-2265.1994.tb02447.x Harvey, 1990, Thyroidal inhibition of growth hormone secretion in fowl, J Mol Endocrinol, 4, 127, 10.1677/jme.0.0040127 Harvey, 1989, Thyrotrophin-releasing hormone (TRH)-induced growth hormone secretion in fowl, J Mol Endocrinol, 3, 23, 10.1677/jme.0.0030023 Geris KL. Presence of hypothalamic hormones and responsiveness of somatotrophs and thyrotrophs during chicken ontogeny. Ph.D. Dissertation. K. U. Leuven, Belgium, 1998. Harvey, 1983, Reduced adrenal function and increased thyroid function in fasted and fed chickens, J Endocrinol, 98, 129, 10.1677/joe.0.0980129