Changes in biomarkers of redox status in serum and saliva of dogs with hypothyroidism

• Published in: BMC veterinary research 2023-02, Vol.19 (1), p.33-33, Article 33
• Main Authors: Arostegui, Luis G González, Prieto, Alberto Muñoz, Marín, Luis Pardo, López, Gregorio García, Tvarijonaviciute, Asta, Madrigal, Jose Joaquín Cerón, Rubio, Camila Peres
• Format: Article
• Language: English
• Subjects: Advanced Oxidation Protein Products; Analysis; Animals; Antioxidants; Antioxidants - metabolism; Aryldialkylphosphatase; Atherosclerosis; Biological markers; Biomarkers; Care and treatment; Diagnosis; Diseases; Dog Diseases; Dogs; Endocrine disorders; Glutathione peroxidase; Health aspects; High density lipoprotein; Hormones; Hypothyroidism; Hypothyroidism - veterinary; Lipid peroxidation; Measurement; Methods; Oxidants; Oxidation; Oxidation-Reduction; Oxidative Stress; Paraoxonase; Peroxides; Proteins; Proto-Oncogene Proteins c-fos - metabolism; Quality of life; Saliva; Saliva - metabolism; Salivary diagnostics; Thiobarbituric acid; Thiobarbituric Acid Reactive Substances; Thyroid diseases; Thyroid hormones; Vitamin E
• ISSN: 1746-6148; 1746-6148
• DOI: 10.1186/s12917-023-03586-4

Hypothyroidism is the most common endocrine disorder diagnosed in dogs, leading to deleterious effects on a dog's life quality. This study aims to evaluate changes in the redox status in canine hypothyroidism. For this purpose, a comprehensive panel of antioxidants and oxidants biomarkers were measured in serum and saliva of 23 dogs with hypothyroidism, 21 dogs with non-thyroidal illness, and 16 healthy dogs. Among the antioxidants, cupric reducing antioxidant capacity (CUPRAC), ferric reducing ability of plasma (FRAP), Trolox equivalent antioxidant capacity (TEAC), thiol, paraoxonase type 1 (PON-1) and glutathione peroxidase (GPx) were determined in serum and CUPRAC, ferric reducing ability of saliva (FRAS) and TEAC in saliva. The oxidant biomarkers included were total oxidant status (TOS), peroxide-activity (POX-Act), reactive oxygen-derived compounds (d-ROMs), advanced oxidation protein products (AOPP), and thiobarbituric acid reactive substances (TBARS) in serum and AOPP and TBARS in saliva. Results showed a significantly higher TEAC, PON-1, GPx, TOS, POX-Act, and d-ROMs, and a significantly lower AOPP in serum of dogs with hypothyroidism. Meanwhile, significantly lower FRAS and AOPP were observed in saliva of dogs with hypothyroidism. Once salivary concentrations were corrected based on their total protein concentrations, the only analyte showing significant changes was TBARS which was significantly higher in dogs with hypothyroidism. Our results show that dogs with hypothyroidism present alterations in the redox status in both serum and saliva. This study should be considered a preliminary study and further research addressing these changes should be made using larger populations.