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Acta Veterinaria Hungarica
Authors: Péter Tóth, László Bódi, Katalin Maros, Endre Szűcs and Janbaz Janan

2009 276 2051 2056 Frigerio, D., Dittami, J., Möstl, E. and Kotrschal, K. (2004): Excreted corticosterone metabolites co

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Acta Physiologica Hungarica
Authors: J. Stark, Zs Tulassay, G. Lengyel, D. Szombath, B. Székács, I. Ádler, I. Marczell, P. Nagy-Répas, E. Dinya, K. Rácz, G. Békési and Iván Horváth

155 163 Caro P, Gómez J, Sanz A, Portero-Otín M, Pamplona R, Barja G: Effect of graded corticosterone treatment on aging-related markers of oxidative stress in rat liver mitochondria. Biogerontology (Epub 2006 Jul 5) 8

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The effect of free-range versus cage management system on corticosterone transfer into the eggs was studied in laying hens. Hungarian Yellow laying hens (age: 21 weeks, body weight: 2.0 ± 0.5 kg) were divided into two groups in the spring: Group I, free-range keeping (n = 15 layers, density: ≯ 0.5 bird/m2) in outdoor runs, with continuous access to a commercial layer feed; Group II, hens kept in battery cages (n = 17 layers, density: 2 birds/m2, natural light, continuous access to feed and water). Eggs were collected after a one-week adaptation period on days 2, 7 and 16. Corticosterone (CST) was extracted from homogenised egg samples using an ASE-200 Accelerated Solvent Extractor and then assayed by liquid chromatography linked with tandem mass spectrometry (LC-MS/MS) [Thermo Quest Surveyor high-performance liquid chromatography (HPLC) interfaced via Atmospheric Pressure Chemical Ionisation (APCI) ion source to Finnigan/Thermo Quest LCQ Deca MS/MS] using dexamethasone as internal standard with positive APCI ionisation. CST concentrations of whole eggs laid by free-range hens on days 2, 7 and 16 were 0.370 ± 0.218, 0.259 ± 0.066 and 0.915 ± 0.745 ng·g-1, respectively, while those of eggs laid by caged hens were 0.206 ± 0.157, 0.223 ± 0.165 and 0.184 ± 0.110 ng·g-1 at the above sampling times. It is concluded that in free-range laying hens the sharp changes of environmental weather conditions significantly increased the corticosterone content of eggs, while the environmentally controlled and closed battery cage management technology resulted in relatively uniform corticosterone concentrations in the whole eggs.

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144 Kotrschal, K., Dittami, J., Hirschenhauser, K., Mostl, E., Peczely, P. (2000) Effects of physiological and social challenges in different seasons on fecal testosterone and corticosterone

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Beuving, G. and Vonder, G. M. (1978): Effect of stressing factors on corticosterone levels in plasma of laying hens. Gen. Comp. Endocrinol. 35 , 153–159. Vonder G. M

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Acta Veterinaria Hungarica
Authors: László Pál, Margit Kulcsár, Judit Poór, László Wágner, Szabolcs Nagy, Károly Dublecz and Ferenc Husvéth

corticosterone levels in the plasma of laying hens . Gen. Comp. Endocrinol . 35 , 153 – 159 . Calder , P. C. ( 2012 ): Mechanisms of action of (n-3) fatty acids . J. Nutr . 142 , 592S – 599S

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Green, P. K., Wilkinson, C. W., Woods, S. C. (1992) Intraventricular corticosterone increases the body weight gain in underweight adrenalectomised rats. Endocrinol. 130 , 269

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Acta Veterinaria Hungarica
Authors: Sreten Nedić, Danijela Kirovski, Ivan Vujanac, Radiša Prodanović, Ljubomir Jovanović, Silvestra Kobal and Tomaž Snoj

. Venkataseshu , G. K. and Estergreen , V. L. Jr. ( 1970 ): Cortisol and corticosterone in bovine plasma . J. Dairy Sci. 53 , 480 – 483 .

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Marin MT, Cruz FC, Planeta CS: Chronic restraint or variable stresses differently affect the behavior, corticosterone secretion and body weight in rats. Physiol. Behav. 90, 29–35 (2007) Planeta C

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the release of corticosterone from the adrenal cortex of rodents. Corticosterone can easily pass the blood-brain barrier and bind to the specific receptors, the mineralocorticoid receptors (MRs) and the glucocorticoid receptors (GRs) [ 3 ]. These two

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