Abstract | BACKGROUND: METHODS:
ATR-101 pharmacokinetics and activity were assessed in 10 dogs with naturally-occurring Cushing's syndrome, including 7 dogs with pituitary-dependent disease and 3 dogs with adrenal-dependent disease. ATR-101 was administered at 3 mg/kg PO once daily for one week, followed by 30 mg/kg PO once daily for one (n = 4) or three (n = 6) weeks. Clinical, biochemical, adrenal hormonal, and pharmacokinetic data were obtained weekly for study duration. RESULTS:
ATR-101 exposure increased with increasing dose. ACTH-stimulated cortisol concentrations, the primary endpoint for the study, were significantly decreased with responders (9 of 10 dogs) experiencing a mean ± standard deviation reduction in cortisol levels of 50 ± 17% at study completion. Decreases in pre- ACTH-stimulated cortisol concentrations were observed in some dogs although overall changes in pre- ACTH cortisol concentrations were not significant. The compound was well-tolerated and no serious drug-related adverse effects were reported. CONCLUSIONS: This study highlights the potential utility of naturally occurring canine Cushing's syndrome as a model for human disease and provides proof of concept for ATR-101 as a novel agent for the treatment of endocrine disorders like Cushing's syndrome in humans.
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Authors | Daniel K Langlois, Michele C Fritz, William D Schall, N Bari Olivier, Rebecca C Smedley, Paul G Pearson, Marc B Bailie, Stephen W Hunt 3rd |
Journal | BMC endocrine disorders
(BMC Endocr Disord)
Vol. 18
Issue 1
Pg. 24
(May 02 2018)
ISSN: 1472-6823 [Electronic] England |
PMID | 29720169
(Publication Type: Journal Article)
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Chemical References |
- Phenylurea Compounds
- Adrenocorticotropic Hormone
- Acetyl-CoA C-Acetyltransferase
- N-(2,6-bis(1-methylethyl)phenyl)-N'-((1-(4-(dimethylamino)phenyl)cyclopentyl)methyl)urea hydrochloride
- Hydrocortisone
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Topics |
- Acetyl-CoA C-Acetyltransferase
(antagonists & inhibitors)
- Adrenocorticotropic Hormone
(metabolism)
- Animals
- Cushing Syndrome
(drug therapy, metabolism, pathology, veterinary)
- Dog Diseases
(metabolism)
- Dogs
- Female
- Hydrocortisone
(metabolism)
- Male
- Phenylurea Compounds
(pharmacokinetics, pharmacology)
- Tissue Distribution
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