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Acta Veterinaria Hungarica
Authors: Á. Klein, Margit Kulcsár, Virág Krízsik, R. Mátics, P. Rudas, J. Török and Gy. Huszenicza

The basic patterns of thyroid hormones [thyroxine (T4) and 3,3',5-triiodothyronine (T3)] and the T4 and T3 responses induced by thyrotropin releasing hormone (TRH) are reported in captive female barn owls (Tyto alba) during the non-breeding period. The main findings of the study, conducted on a total of 10 owls, are as follow: (1) The thyroid gland of barn owl can be stimulated by the classical TRH stimulation test. (2) T3 response was much more pronounced both under cold (around 10°C) and warm (around 20°C) conditions, whereas T4 response ranged so widely that we could not point out any significant change in it. (3) Basal T3 plasma level was significantly (p = 0.036) higher in birds exposed to cold temperature, and they responded to TRH treatment with a lower plasma T3 elevation than the birds kept in a warm chamber. This pattern, however, cannot be explained by increased food intake, but is in agreement with the fact that enhanced T3 level may account for higher avUCP mRNA expression, which results in higher heat production on the cell level. From the results it is concluded that altering T3 plasma level plays a significant role in cold-induced thermoregulation.

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Acta Veterinaria Hungarica
Authors: Andrea Győrffy, Ahmed Sayed-Ahmed, Attila Zsarnovszky, Vilmos Frenyó, Eddy Decuypere and Tibor Bartha

Bartha, T., Rudas, P., Fekete, S. and Pethes, G. (1989): Restricted feed intake influences thyroid hormone production and peripheral deiodination in chickens. Acta Vet. Hung. 37 , 241

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Acta Veterinaria Hungarica
Authors: Virág Somogyi, Tamás L. Horváth, István Tóth, Tibor Bartha, László Vilmos Frenyó, Dávid Sándor Kiss, Gergely Jócsák, Annamária Kerti, Frederick Naftolin and Attila Zsarnovszky

Wondisford , F. E. ( 2003 ): Dominant inhibition of thyroid hormone action selectively in the pituitary of thyroid hormone receptor-beta null mice abolishes the regulation of thyrotropin by thyroid hormone . Mol. Endocrinol. 17 , 1767 – 1776

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human alpha-1 thyroid hormone receptor expressed in Escherichia coli. Endocrinology 129, 3027--3033. Effects of zinc and other divalent metals on deoxyribonucleic acid binding and hormone binding activity of human alpha-1

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hormone, insulin- like growth factor-I, insulin-like growth factor-binding protein, and thyroid hormones in female broiler breeder chickens. Gen. Comp. Endocrinol. 107 , 212-220. The effect of food intake from two weeks of age to

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Acta Veterinaria Hungarica
Authors: Andrea Győrffy, Mónika Keresztes, Vera Faigl, Vilmos Frenyó, Margit Kulcsár, Tibor Gaál, Miklós Mézes, Attila Zsarnovszky, Gyula Huszenicza and Tibor Bartha

65 75 Brown, S., Maloney, M. and Kinlaw, W. (1997): ’spot 14’ protein functions at the pretranslational level in the regulation of hepatic metabolism by thyroid hormone and

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, H. and Sechman, A. (1986): Thyroid hormones and insulin in milk: a comparative study. Endocr. Exp. 20 , 247-255. Thyroid hormones and insulin in milk: a comparative study. Endocr. Exp

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Acta Veterinaria Hungarica
Authors: Trudy Scalise, Andrea Győrffy, István Tóth, Dávid Kiss, Virág Somogyi, Gréta Goszleth, Tibor Bartha, László Frenyó and Attila Zsarnovszky

2009 150 1112 1121 Bernal, J. (2007): Thyroid hormone receptors in brain development and function. Nat. Clin. Pract

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., Van As, P., Van der Geyten, S. and Darras, V. M. (2005): Thyroid hormone availability and activity in avian species: A review. Domest. Anim. Endocrinol. 29 , 63–77. Darras V. M

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1914 Otsuka, R., Aoki, K., Hon, H., Wada, M. (1998) Changes in circulating LH, sex steroid hormones, thyroid hormones and corticosterone in relation to breeding and molting in captive Humboldt

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