Effects of Dietary Supplementation of Some Antioxidants on Liver Antioxidant Status and Plasma Biochemistry Parameters of Heat-Stressed Quail

Abstract

This study aimed to compare the dietary supplementation of oleuropein (O) and α-tocopherol acetate (TA) alone or with organic selenium (Se) on liver antioxidant status and some plasma biochemistry parameters in Japanese quails reared under heat stress (HS). A total of 800, two-weeks old quails were kept in wire cages in the temperaturecontrolled rooms at either 22°C or 34°C for 8 h/d and fed on a basal diet (NC) or the diets supplemented with TA (TA200) or O (O200) at 200 mg/kg alone or with OSe (TA200+OSe and O200+OSe) to the NC diet. HS decreased the total antioxidant status (TAS) and increased the total oxidative stress (TOS) and oxidative stress index (OSI) of liver compared to thermoneutral temperature (TN). The TA200, O200, TA200+OSe and O200+OSe diets increased TAS and decreased TOS of liver compared to those of quails fed NC. OSI was decreased by the TA200, O200 and TA200+OSe diets compared to NC and O200+OSe diets. HS reduced plasma albumin (A) and total protein (TP) concentrations, on the other hand, increased plasma glucose (G), total cholesterol (CHO) and triglyceride (TG) levels compared to TN. The TA200, O200, TA200+OSe and O200+OSe diets reduced plasma total CHO and TG levels and increased plasma A level. The TA200 and TA200+OSe diets reduced plasma G level and increased plasma TP levels compared to those of quails fed the other diets. In conclusion, dietary supplementation of vitamin E and oleuropein alone or with organic selenium is necessary to remove the negative effects of heat stress on liver antioxidant status and some plasma parameters of quails.

Improving the Quality Characteristics and Shelf Life of Meat and Growth Performance in Goose Fed Diets Supplemented with Vitamin E

“…In contrast, other researchers reported that the serum TAS was not affected by dietary vitamin E supplementation in broilers [ 38 ] and laying hens [ 41 ]. In the same line, a recent study reported that the supplementation of vitamin E in Japanese quail diets reduced the serum total cholesterol and triglycerides [ 42 ]. This finding supports previous studies [ 37 , 39 , 40 ], who reported a reduction of the serum total cholesterol of birds fed a vitamin E-supplemented diet under heat stress conditions.…”

Phenolic Compounds Obtained from Olea europaea By-Products and Their Use to Improve the Quality and Shelf Life of Meat and Meat Products—A Review

“…In the case of olive pulp (50 and 100 g/kg), both GSH and GSR levels were improved but no significant effect was reported for UA and TBARS levels in the blood after 6 weeks of supplemented diet [81]. Likewise, the addition of oleuropein (200 mg/kg) was also associated with increased antioxidant capacity and reduced oxidative stress in the liver of Japanese quail [82].…”

Egg Quality, Oxidative Status, Serum Metabolic Profile and Intestinal Morphology of Laying Hens as Influenced by a Dietary Mixed Powder of Plant Leaves

“…Turkez et al ( 2012) [169] reported that olive leaf extract showed beneficial influences against the genetic and oxidative damage of permethrin by increasing TAS and reducing TOS in rats. Oleuropein supplementation increased TAS and reduced TOS in quails subjected to heat stress [170].…”