Oxidative biomarkers and lipid alterations in euthyroid and hypothyroid dogs

• Published in: Comparative clinical pathology Vol. 30; no. 4; pp. 571 - 576
• Main Authors: Ryad, Noha M., Ramadan, Eman S., Salem, Noha Y., Saleh, Ibrahim Abd El-Satar
• Format: Journal Article
• Language: English
• Published: London Springer London 01-08-2021; Springer Nature B.V
• Subjects: Antioxidants; Biomarkers; Cholesterol; Hematology; Hyperlipidemia; Hypothyroidism; Malondialdehyde; Medicine; Medicine & Public Health; Oncology; Original Article; Oxidative stress; Pathology; Patients; Thyroid gland; Thyroid hormones; Thyroid-stimulating hormone; Thyroxine; Triglycerides; Oxidant; Hypothyroidism; Antioxidant; Cholesterol; Dogs
• ISSN: 1618-5641; 1618-565X
• DOI: 10.1007/s00580-021-03219-y

In recent years, few reports suggest that the oxidative process may be present in hypothyroid patients; however, these reports were mostly contradictory and with very few data regarding canine patients. So, this investigation was designed to study oxidative stress alterations in both hypothyroid and euthyroid dogs. The study was conducted on thirteen dogs (six hypothyroid dogs and seven euthyroid dogs) with an age range of 4–7 years. Establishing hypothyroidism was based on clinical signs and results of thyroid hormones evaluation. Serum samples were taken from each animal for evaluation of free T4 (fT4), total T4 (TT4), thyroid-stimulating hormone (TSH), cholesterol, triglycerides, ALP, malondialdehyde (MDA), and total antioxidant capacity (TAC), and comparison between euthyroid data and hypothyroid data was made. There was a decrease in fT4 and TT4 in hypothyroid patients along with elevation in TSH, cholesterol, triglycerides, and ALP. Oxidative biomarkers showed significant (
P
 ≤ 0.05) elevation in both MDA and TAC in the hypothyroid dog. Canine hypothyroidism is associated with oxidative stress manifested with elevation in MDA and TAC; this process is exasperated by hyperlipidemia.