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. 2018 Dec 17;14:404. doi: 10.1186/s12917-018-1727-2

Table 4.

Blood redox parameters in turkeys fed diets with different Met sources and content (n = 8)

Blood redox parameters5
Vit Cμmol/l SOD U/g Hb GPx U/g Hb CAT U/g Hb GSH + GSSG μmol/l FRAP μmol/l MDA μmol/l LOOH μmol/l
Treatment1
DLML 5.66 306 147b 794 0.83ab 1108a 0.82 35.1
MHAL 4.95 385 143b 996 0.72c 588c 1.00 30.3
DLMH 5.32 265 173a 726 0.80b 854b 0.81 33.5
MHAH 4.90 377 107c 1119 0.89a 959ab 0.80 23.9
Dosage2 (D)
Low 5.31 345 145 895 0.77 848 0.91 32.7
High 5.11 321 140 922 0.84 906 0.81 28.7
Source3 (S)
DLM 5.49 286 160 760 0.81 981 0.82 34.3
MHA 4.92 380 125 1057 0.80 773 0.90 27.1
p-value
Dosage 0.423 0.130 0.299 0.558 0.012 0.302 0.062 0.035
Source 0.027 < 0.001 < 0.001 < 0.001 0.634 0.001 0.139 < 0.001
D × S 0.559 0.303 < 0.001 0.066 0.001 < 0.001 0.088 0.190
SEM4 0.128 11.63 4.885 35.59 0.017 43.09 0.029 1.154

1Diets fed to turkeys containing DL-methionine (DLML and DLMH) and the equivalent amount of DL-methionine hydroxyl analogue (MHAL and MHAH) at two levels: low (L) and high - (H)

2Low level - 0.55 and 0.45% and high level - 0.78, 0.65%, in weeks 1–4 and 5–8 of feeding

3Sources of methionine: DL-isomer (DLM) and DL- methionine hydroxy analogue (MHA)

4SEM, standard error of the mean

5Vit C: vitamin C, SOD: superoxide dismutase, GPx: glutathione peroxidase, CAT: catalase, GSH + GSSG: total glutathione, FRAP: ferric reducing ability of plasma, MDA: malondialdehyde, LOOH: lipid peroxides

a-bvalues differ significantly