Influence of high inorganic selenium and manganese diets for fattening pigs on oxidative stability and pork quality parameters

Abstract

Data are scarce regarding combined high Se and Mn supplementation in livestock diets, however, as Se and Mn are functionally related as cofactors of glutathione peroxidase (GPx) and Mn-superoxide dismutase (SOD), respectively, beneficial synergistic effects on oxidative stability of tissues may result. This experiment evaluated the effect of an oversupply of Se and Mn within European legal limits compared with recommendations on performance, oxidative stability of the organism and meat quality in a randomised complete block design. A total of 60 crossbred gilts were fed maize-barley-soya bean meal diets formulated in a 2 × 2 factorial approach with inorganic Se (0.2 v. 0.5 mg/kg Se dry matter (DM)) or inorganic Mn (20 v. 150 mg/kg Mn DM) from 31 to 116 kg BW. Se supplementation reduced feed intake, whereas high Mn diets impaired average daily gain ( P < 0.05). Qualitative carcass characteristics were impaired by Se and Mn predominantly in the semimembranosus muscle. Activity of GPx in liver was increased by high Se diets ( P < 0.05). Mn supplementation increased catalase (CAT) activity in liver, GPx in plasma and total antioxidative capacity (TAC) in muscle, whereas it decreased CAT activity in plasma ( P < 0.05). Cu/Zn-SOD in muscle showed higher activity in high-Se-low-Mn diets but lower activity when both high Se and Mn were combined (Se × Mn P < 0.05). Mn supplementation increased Mn concentration in longissimus thoracis et lumborum, but simultaneously reduced Se concentration ( P < 0.05). Upon retail display, Mn increased lipid oxidation more pronouncedly (higher thiobarbituric acid reactive substances; P < 0.05) than Se ( P < 0.10). Despite some positive effects (Mn increased TAC, Se increased GPx, Se and Mn increased tenderness), no synergistic effects of high Se and Mn diets or an overall beneficial impact on meat quality, especially during storage, could be observed. Including the negative effects on performance, feeding Se and Mn up to the maximum legal level cannot be recommended.

Effects of Astragalus Membranaceus supplementation on oxidative stability of Cashmere goat

“…Some researches found that Cashmere goat's cashmere and meat are not only affected by animal species, age, sex, feeding methods and other factors, but also closely related to its antioxidant capacity (Qwele et al., 2013; Zervas & Tsiplakou, 2011). Several researchers have shown that dietary supplementation can affect meat color, flavor, and oxidative stability (Rezar et al., 2017; Rossi et al., 2013; Schwarz et al., 2016). Poor feed structure can make organism excessive oxidation and speed up the aging of cashmere goats.…”

“…Several researchers have shown that dietary supplementation can affect meat color, flavor, and oxidative stability (Rezar et al, 2017;Rossi et al, 2013;Schwarz et al, 2016). Poor feed structure can make organism excessive oxidation and speed up the aging of cashmere goats.…”

Effect of dietary polyunsaturated fatty acid and antioxidant supplementation on the transcriptional level of genes involved in lipid and energy metabolism in swine

“…Tous et al [ 10 ] reported that dietary conjugated linoleic acid (CLA) can affect the expression of both porcine lipogenic and regulatory genes including PPARA , PPARG , FASN , SREBF1 , ACACA , LPL , D6D , SCD in a tissue-specific manner. Some studies have described that supplementing the diet with antioxidants or polyphenols can also influence nutrient digestibility, gut microbiota, expression of pro-inflammatory genes and meat quality traits in pigs [ 15 – 19 ]. Overall, the effects of dietary supplementation on gene expression are mostly unknown.…”

Effects of graded concentrations of supplemental selenium on selenium concentrations in tissues and prediction equations for estimating dietary selenium intake in pigs

“…The Se deficiency in pigs induces sudden death, reduced reproduction and milk production, and impaired immune response ( National Research Council, 2012 ). Positive effects of supplemental dietary Se on meat quality and antioxidative status for pigs have been reported ( Calvo et al, 2017 ; Schwarz et al, 2017 ). However, excessive consumption of Se occurs toxicity in animals.…”