Table 7.
Effects of dietary Lycium barbarum polysaccharides on serum concentrations of IL-2, IL-4, IL-6, IFN-γ, and TNF-α in broiler chickens at 42 D of age.1
| Items | LBP levels (mg/kg of feed) |
SEM |
P-value |
||||
|---|---|---|---|---|---|---|---|
| 0 | 1,000 | 2,000 | 4,000 | Linear | Quadratic | ||
| IL-2 (μg/mL) | 175.331b | 181.743b | 197.378a | 196.402a | 3.046 | 0.006 | 0.009 |
| IL-4 (ng/mL) | 81.272c | 83.629b,c | 89.337a | 84.792a,b | 1.853 | 0.004 | 0.003 |
| IL-6 (pg/mL) | 20.593c | 25.196a,b | 27.571a | 23.893b | 0.176 | 0.003 | 0.017 |
| TNF-α (pg/mL) | 34.759b | 36.784a,b | 39.832a | 36.971a,b | 0.287 | 0.007 | 0.129 |
| IFN-γ (pg/mL) | 61.481c | 63.726b | 77.365a | 76.952a | 2.591 | <0.001 | <0.001 |
a,b,c Means within a row with no common superscript letters differ significantly (P < 0.05).
Abbreviations: IFN-γ, interferon gamma; LBP, Lycium barbarum polysaccharides; TNF-α, tumor necrosis factor α.
1
Data are means collected from 8 birds from each treatment (1 bird per replicate).