Journal article

Publication year: 2017

Pages: 1166-1174

Journal: Journal of Animal Physiology and Animal Nutrition

Volume number: 101

Issue number: 6

ISSN: 0931-2439

DOI Link: https://doi.org/10.1111/jpn.12633

Publisher: Wiley

Abstract: 
This study investigated the hypothesis that dietary concentrations of methionine (Met), as a precursor of cysteine which is a constituent of glutathione (GSH), affect tissue antioxidant concentrations and the antioxidant defence system in pigs. Forty-five piglets (DanZuchtxPietrain) were allotted to three groups of similar mean body weight (11.0 +/- 0.9kg). The basal diet was composed of barley, wheat, corn starch, soybean oil, sucrose, cellulose and a mineral supplement with suboptimal concentrations of Met and was supplemented with dl-Met to reach 0.16%, 0.20% and 0.24% of dietary Met and 0.40%, 0.44% and 0.48% of dietary Met and cysteine in groups 0.16, 0.20 and 0.24 respectively. After 3weeks, at slaughter, samples of liver, jejunum mucosa and plasma were collected. Feed intake and weight gains increased and feed:gain ratio decreased when dietary Met concentrations increased. The Trolox equivalent antioxidant capacity (TEAC), concentrations of GSH and thiobarbituric acid reactive substances (TBA-RS) and the activity of the glutathione peroxidase (GPx) in liver and jejunum mucosa were similar in all groups (p>0.05). Relative mRNA concentrations of selected target genes of the nuclear factor (erythroid-derived 2)-like 2 (Nrf2), the master regulator of the antioxidant response, and of the nuclear factor kappa-light-chain-enhancer' of activated B-cells (NF-B), the master regulator of inflammation, were largely unaffected both in jejunum and liver. In conclusion, inflammation- and oxidative stress-related pathways on the molecular level, and concentrations of lipid peroxidation products, of antioxidants and of enzymes involved in the antioxidant defence system were mostly unaffected by dietary Met concentration in gut and liver. These findings suggest that suboptimal dietary Met concentrations did not influence the antioxidant defence system of gut and liver in healthy piglets.

Harvard Citation style: Zeitz, J., Kaltenböck, S., Most, E. and Eder, K. (2017) Antioxidant status and expression of inflammatory genes in gut and liver of piglets fed different dietary methionine concentrations, Journal of Animal Physiology and Animal Nutrition, 101(6), pp. 1166-1174. https://doi.org/10.1111/jpn.12633

APA Citation style: Zeitz, J., Kaltenböck, S., Most, E., & Eder, K. (2017). Antioxidant status and expression of inflammatory genes in gut and liver of piglets fed different dietary methionine concentrations. Journal of Animal Physiology and Animal Nutrition. 101(6), 1166-1174. https://doi.org/10.1111/jpn.12633