Affiliation:
1. Department of Veterinary Clinical Sciences Iowa State University College of Veterinary Medicine Ames Iowa USA
2. Department of Clinical Sciences North Carolina State University College of Veterinary Medicine Raleigh North Carolina USA
Abstract
AbstractBackgroundThe hypothalamic‐pituitary‐adrenocortical axis (HPAA) response to sepsis can be impaired in critical illness. Corticotropin‐releasing hormone (CRH) stimulation test might assess HPAA function in foals.ObjectiveTo evaluate plasma cortisol, ACTH, arginine vasopressin (AVP), and endogenous CRH (eCRH) response to different doses of ovine CRH (oCRH).AnimalsHealthy (n = 14) and hospitalized (n = 15) foals <7 days of age.MethodsIn this prospective randomized study, oCRH (0.1, 0.3, and 1 μg/kg) was administered intravenously and blood samples were collected before, 15, 30, 60, and 90 minutes after administration of oCRH to determine plasma hormone concentrations. The hormonal response was evaluated as the difference (Delta; μg/dL or pg/mL) or percent change between baseline hormone concentration and each time point after oCRH stimulation.ResultsCortisol concentrations increased from baseline at 15 minutes with 0.1 and 0.3 μg/kg and at 30 and 60 minutes from baseline with 1 μg/kg oCRH (P < .05) in healthy and hospitalized foals. ACTH concentrations increased from baseline at 15 minutes with 0.1 μg/kg and at 30 minutes with 1 μg/kg oCRH (P < .05) in hospitalized foals. Delta cortisol 0 – 30, ACTH 0 – 30, and eCRH 0 – 30 was higher for the 1 μg/kg compared with 0.1 μg/kg oCRH in healthy foals (P < .05). Delta ACTH 0 – 15 and eCRH 0 – 30 was higher for the 1 μg/kg compared with the lower doses of oCRH in hospitalized foals (P < .05).Conclusions and Clinical ImportanceCortisol, ACTH, and eCRH concentrations increased in response to administration of all doses of oCRH. One microgram per kilogram of oCRH appears to be optimal for the assessment of HPAA in healthy and hospitalized foals.
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献