Urinary concentration of corticoids in ponies with hyperlipoproteinaemia or hyperadrenocorticism |
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Authors: | van der Kolk J H Wensing T |
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Institution: | Department of Large Animal Medicine and Nutrition, Faculty of Veterinary Medicine, Utrecht University, The Netherlands. |
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Abstract: | The urinary corticoid:creatinine (c:c) ratio was determined in ten pony mares suffering from hyperlipoproteinaemia. The mean (+/- sd) urinary c:c ratio of these ten ponies (47 +/- 31 x 10(-6)) was not significantly different from that of twelve pony mares with a pituitary pars intermedia adenoma (31 +/- 18 x 10(-6). The correlation between the urinary concentration of corticoids and plasma total lipids, and the correlation between the urinary c:c ratio and plasma total lipids in ponies with hyperlipoproteinaemia were not significant (P > 0.05; r = 0.53 and r = 0.008, respectively). Preliminary results favour primary hyperadrenocorticism being associated with hyperlipoproteinaemia. In conclusion, the data presented here suggest that cortisol can contribute to insulin resistance in ponies with hyperlipoproteinaemia. |
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