PMID: 11927390Apr 3, 2002Paper

Influence of sex and gonadal status of sheep on cortisol secretion in response to ACTH and on cortisol and LH secretion in response to stress: importance of different stressors

The Journal of Endocrinology
Anne I TurnerA J Tilbrook

Abstract

There are sex differences in the response to stress and in the influence of stress on reproduction which may be due to gonadal steroids but the nature of these differences and the role of the gonads are not understood. We tested the hypotheses that sex and the presence/absence of gonads (gonadal status) will influence the cortisol response to injection of ACTH, insulin-induced hypoglycaemia and isolation/restraint stress, and that sex and gonadal status will influence the secretion of LH in response to isolation/restraint stress. Four groups of sheep were used in each of three experiments: gonad-intact rams, gonadectomised rams, gonad-intact ewes in the mid-luteal phase of the oestrous cycle and gonadectomised ewes. In Experiment 1 (n=4/group), jugular blood samples were collected every 10 min for 6 h; after 3 h, two animals in each group were injected (i.v.) with ACTH and the remaining two animals were injected (i.v.) with saline. Treatments were reversed 5 days later so that every animal received both treatments. Experiment 2 (n=4/group) used a similar schedule except that insulin was injected (i.v.) instead of ACTH. In Experiment 3 (n=5/group), blood samples were collected every 10 min for 16 h on a control day and again 2 w...Continue Reading

Citations

Apr 27, 2010·The British Journal of Nutrition·Susan J TorresCaryl A Nowson
Apr 8, 2014·Animal : an International Journal of Animal Bioscience·E van LierA Meikle
May 25, 2013·Endocrinology and Metabolism Clinics of North America·Johannes D VeldhuisFerdinand Roelfsema
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Aug 2, 2005·Annals of the New York Academy of Sciences·Chadi Touma, Rupert Palme
Feb 10, 2011·Veterinary Anaesthesia and Analgesia·Corinna ClarkJoanna Murrell
Jan 12, 2012·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Frank Timo BeilPia Pogoda
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Dec 8, 2004·Regulatory Peptides·Tye DawoodPaul A Komesaroff
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Dec 12, 2020·Physiology & Behavior·Juan Pablo DamiánElize van Lier
Mar 31, 2021·Journal of Equine Veterinary Science·Liliana RossettoMarcelo H Miragaya

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