Table 6.
Effects of dietary taurine supplementation on the expression levels of hepatic antioxidant-related genes of broilers.
| Items4 | Dietary taurine concentration treatment3 |
SEM1 |
P Value |
||||
|---|---|---|---|---|---|---|---|
| CON | TAU1 | TAU2 | TAU3 | Linear2 | Quadratic2 | ||
| NRF2 | 1.000b | 1.358a,b | 1.461a | 1.322a,b | 0.069 | 0.074 | 0.064 |
| HO-1 | 1.000b | 1.321a,b | 1.634a | 1.608a | 0.094 | 0.010 | 0.323 |
| GPX | 1.000b | 1.640a,b | 1.807a | 1.165a,b | 0.126 | 0.530 | 0.010 |
| SOD1 | 1.000 | 0.989 | 1.009 | 0.976 | 0.051 | 0.912 | 0.919 |
| CAT | 1.000 | 0.839 | 0.949 | 1.030 | 0.060 | 0.720 | 0.338 |
a,bMeans within the same row with no common superscript differ significantly (P < 0.05).
Abbreviations: CAT, catalase; GPX, glutathione peroxidase; HO-1, heme oxygenase-1; NRF2, nuclear factor erythroid 2–related factor 2; SOD1, superoxide dismutase 1.
Standard error of the means (n = 8).
Orthogonal polynomials were used to evaluate linear and quadratic responses to the levels of taurine treatment.
CON, basal diet; TAU1, TAU2 and TAU3 group, basal diet adding 2.50, 5.00, and 7.50 g/kg TAU, respectively.
Expressed in arbitrary units. The expression of each target gene for the CON group was assigned a value of 1 and normalized against beta actin.