PMID- 35994839 OWN - NLM STAT- MEDLINE DCOM- 20221101 LR - 20221101 IS - 1532-2661 (Electronic) IS - 0034-5288 (Linking) VI - 152 DP - 2022 Dec 20 TI - Evaluation of the ACTH stimulation test using a low dose of a depot formulation in healthy dogs and in dogs with untreated Cushing's syndrome. PG - 207-211 LID - S0034-5288(22)00243-0 [pii] LID - 10.1016/j.rvsc.2022.08.010 [doi] AB - The sensitivity of the adrenocorticotropic hormone (ACTH) stimulation test to detect Cushing's Syndrome (CS) using a depot formulation needs to be evaluated. The aims of this study were to propose a reference interval (RI) for cortisol values 1-hour after administration of a low-dose of depot ACTH in healthy dogs, and to evaluate the sensitivity of this test to detect CS, differentiating among types of CS based on ultrasound findings. Forty-one healthy dogs (20 males, 21 females) were prospectively included. Additionally, 90 dogs with CS (31 males, 59 females) were retrospectively included. Dogs with CS were ultrasonographically classified as follows: 44 dogs with symmetrical adrenomegaly consistent with pituitary-dependent hypercortisolism (PDH), 8 dogs with unilateral adrenomegaly and atrophy of the contralateral adrenal gland or unilateral or bilateral adrenomegaly with malignancy features consistent with adrenal-dependent hypercortisolism (ADH), 34 dogs with equivocal adrenal asymmetry (EAA) and 4 dogs with normal adrenal thickness. In healthy dogs, lower and upper limit of the 95% RI for 1-hour post-ACTH cortisol concentration and their 90% confidence intervals, were 4.4 (2.7-5.8) mug/dl and 18.4 (16.5-20.0) mug/dl, respectively. Post-ACTH cortisol concentration was above the RI in 90.0% (ci95%, 76.1-100) of dogs with CS. An elevated post-ACTH cortisol concentration was detected in 95.5% (ci95%, 76.1-100) of dogs with PDH, 62.5% (ci95%, 46.1-78.9) of dogs with ADH and 88.2% (ci95%, 69.1-100) of dogs with EAA. The sensitivity of the ACTH stimulation test using a low-dose of depot ACTH in high in dogs with CS. CI - Copyright (c) 2022. Published by Elsevier Ltd. FAU - Melian, Carlos AU - Melian C AD - Department of Animal Pathology, Faculty of Veterinary Medicine, University of Las Palmas de Gran Canaria, 35413 Arucas, Las Palmas, Spain; University Institute of Biomedical and Health Research, Paseo Blas Cabrera Felipe s/n, 35016 Las Palmas de Gran Canaria, Spain. FAU - Blanco, Beatriz AU - Blanco B AD - Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, University of Cordoba, 14005 Cordoba, Spain. FAU - Ginel, Pedro J AU - Ginel PJ AD - Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, University of Cordoba, 14005 Cordoba, Spain. FAU - Perez-Lopez, Laura AU - Perez-Lopez L AD - University Institute of Biomedical and Health Research, Paseo Blas Cabrera Felipe s/n, 35016 Las Palmas de Gran Canaria, Spain. Electronic address: laura.perezlopez@ulpgc.es. LA - eng PT - Journal Article DEP - 20220812 PL - England TA - Res Vet Sci JT - Research in veterinary science JID - 0401300 RN - 9002-60-2 (Adrenocorticotropic Hormone) RN - WI4X0X7BPJ (Hydrocortisone) SB - IM MH - Male MH - Female MH - Dogs MH - Animals MH - *Cushing Syndrome/diagnosis/veterinary MH - Adrenocorticotropic Hormone/pharmacology MH - Hydrocortisone MH - Retrospective Studies MH - *Pituitary ACTH Hypersecretion/veterinary MH - *Dog Diseases/diagnostic imaging OTO - NOTNLM OT - Adrenal gland OT - Adrenocorticotropic hormone OT - Cushing's syndrome OT - Hypercortisolism COIS- Declaration of Competing Interest None. EDAT- 2022/08/23 06:00 MHDA- 2022/11/02 06:00 CRDT- 2022/08/22 18:15 PHST- 2021/09/28 00:00 [received] PHST- 2022/05/19 00:00 [revised] PHST- 2022/08/08 00:00 [accepted] PHST- 2022/08/23 06:00 [pubmed] PHST- 2022/11/02 06:00 [medline] PHST- 2022/08/22 18:15 [entrez] AID - S0034-5288(22)00243-0 [pii] AID - 10.1016/j.rvsc.2022.08.010 [doi] PST - ppublish SO - Res Vet Sci. 2022 Dec 20;152:207-211. doi: 10.1016/j.rvsc.2022.08.010. Epub 2022 Aug 12.