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RESEARCH ARTICLE

Diphenyl diselenide subcutaneous supplementation of dairy sheep: effects on oxidant and antioxidant status, inflammatory response and milk composition

Angelisa H. Biazus A , Chrystian J. Cazarotto A , Gustavo Machado B , Nathieli B. Bottari C , Mariana S. Alves C , Vera M. Morsch C , Maria R. C. Schetinger C , Marta L. R. Leal D , Natieli F. Fernandes E , Rafael N. Moresco E , Matheus D. Baldissera F and Aleksandro S. Da Silva B C G
+ Author Affiliations
- Author Affiliations

A Graduate Program in Animal Science and Department of Animal Science, Universidade do Estado de Santa Catarina (UDESC), Chapecó, Santa Catarina (SC), Brazil.

B Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, USA.

C Graduate Program in Toxicological Biochemical and Department of Biochemistry and Molecular Biology, Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil.

D Department of Large Animal Medicine (UFSM), Santa Maria, RS, Brazil.

E Department of Clinical and Toxicological Analysis (UFSM), Santa Maria, RS, Brazil.

F Department of Microbiology and Parasitology (UFSM), Santa Maria, RS, Brazil.

G Corresponding author. Email: aleksandro_ss@yahoo.com.br

Animal Production Science 59(3) 461-470 https://doi.org/10.1071/AN17374
Submitted: 5 June 2017  Accepted: 18 January 2018   Published: 16 April 2018

Abstract

Diphenyl diselenide ((PhSe)2) is a organoselenium compound with potent antioxidant properties. Therefore, the aim of the present study was to evaluate whether subcutaneous supplementation of (PhSe)2 in dairy sheep has positive effects on milk composition, as well as on the prevention of oxidative stress and exacerbated inflammatory response. For this, 16 primiparous recently calved sheep were divided into the following two groups, with eight animals in each: Group A, the control group; and Group B, the group subcutaneously supplemented with five doses of (PhSe)2 of 3.0 µmol/kg each every 7 days. Blood samples from supplemented animals showed increased concentration of antioxidant enzymes (catalase, superoxide dismutase, glutathione peroxidase and glutathione-S-transferase), and reduced reactive oxygen species and lipid peroxidation, which prevented oxidative damage in the lactation period, as well as increased seric interleukin-10, an anti-inflammatory cytokine. In the sera, supplemented animals showed increased total antioxidant capacity and ferric-reducing ability of plasma compared with the control group. As a consequence, supplemented animals showed increased antioxidant variables, as well as reduced protein oxidation in milk samples. Moreover, milk from supplemented sheep showed a higher fat content, and lower total protein and lactose contents in some periods in the study, than did not-supplemented ewes. Seric concentrations of interleukin-1 were lower on Days 30 and 45 in supplemented animals, as well as the concentrations of tumour necrosis factor α in all periods, than were those in the control group, whereas the interleukin-10 concentrations were higher. Thus, dairy sheep supplementation of (PhSe)2 activated antioxidant and anti-inflammatory responses, and increased milk fat content. Moreover, this protocol increased the antioxidant and, consequently, reduced the oxidant concentration in milk, which is desirable for product quality.

Additional keywords: biochemistry, selenium, sheep milk.


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