Metabolic profiling of serum from dogs with pituitary-dependent hyperadrenocorticism. (September 2021)

• Record Type: Journal Article
• Authors: Muñoz-Prieto, Alberto; Rubić, Ivana; Horvatic, Anita; Rafaj, Renata Baric; Cerón, José Joaquín; Tvarijonaviciute, Asta; Mrljak, Vladimir
• Is Part Of: Research in veterinary science. Volume 138(2021)
• Page Start: 161
• Page End: 166
• Publication Date: 2021-09
• Subjects: Canine -- Biomarkers -- LC/MS -- Metabolomics -- Pituitary-dependent hyperadrenocorticism -- Serum; Veterinary medicine -- Periodicals; Veterinary Medicine -- Periodicals; Médecine vétérinaire -- Périodiques; Médecine vétérinaire -- Recherche -- Périodiques; Diergeneeskunde; 636.089
• DOI: 10.1016/j.rvsc.2021.06.011
• Languages: English
• ISSNs: 0034-5288

Abstract

Abstract: Hyperadrenocorticism (HAC) is one of the most common endocrine diseases in dogs characterized by excessive cortisol production caused by an adrenocorticotropic hormone (ACTH)-secreting tumor, namely pituitary-dependent HAC (PDH) or cortisol-secreting adrenal tumor. Metabolomics presents the ability to identify small molecule metabolites. Thus, the use of metabolomics techniques in canine PDH can provide information about the pathophysiology and metabolic changes in this disease. This study aimed to identify and compare differences in serum metabolites between dogs with PDH and healthy dogs. The metabolomic profile of 20 dogs diagnosed with PDH was compared with 20 healthy dogs using liquid chromatography/mass spectrometry (LC/MS), and metabolite discrimination was performed using partial least squares-discriminant analysis (PLS-DA), the variable important in projection (VIP) and fold changes (FC) group-wise comparisons. The hypergeometric test identified the significantly altered pathways. A total of 21 metabolites were found to be significantly different between the two groups. The major alterations were found in arachidonic and decanoic acid, and phospholipids related to phosphatidylcholine (PC), phosphatidylethanolamine (PE) and phosphatidylinositol (PI). These metabolites are related to insulin resistance and other complications (i.e. hypertension). Our results indicate that PDH produces changes in serum metabolites of dogs, and the knowledge of these changes can aid to better understanding of pathophysiological processes involved and contribute to potentially detect new biomarkers for this disease. Highlights: Pituitary-dependent hyperadrenocorticism (PDH) alters serum metabolome in dogs. Metabolites more affected were fatty acids, amino acids and glycerophospholipids. Metabolite changes could be related to the physiopathology of this disease.