Table 5.
The effects of probiotic on catecholamines, 5-HT, and respective metabolites in the raphe nuclei of 43-day-old broilers subjected to daily cycling heating episodes (n = 12).
| Item | Control | Probiotic | SEM | P value |
|---|---|---|---|---|
| Catecholamine system | ||||
| DA (ng/g) | 106.69 | 103.08 | 2.00 | 0.79 |
| NE (ng/g) | 921.93 | 946.96 | 23.34 | 0.83 |
| EP (ng/g) | 156.46 | 161.41 | 5.71 | 0.66 |
| DOPAC (ng/g) | 52.32 | 53.29 | 0.71 | 0.74 |
| HVA (ng/g) | 156.39 | 155.82 | 2.40 | 0.95 |
| DOPAC/DA | 0.49 | 0.53 | 0.01 | 0.30 |
| HVA/DOPAC | 1.48 | 1.56 | 0.04 | 0.64 |
| 5-HT system | ||||
| TRP (ng/g) | 5753.77 | 5887.75 | 141.30 | 0.81 |
| 5-HT (ng/g) | 472.39 | 448.69 | 10.97 | 0.60 |
| 5-HIAA (ng/g) | 376.39 | 411.81 | 11.69 | 0.46 |
| 5-HIAA/5-HT | 0.84 | 0.95 | 0.04 | 0.51 |
Least square means were presented (n = 12).
Abbreviations: 5-HIAA, 5-hydroxyindoleacetic acid; 5-HT, 5-hydroxytryptamine; DA, dopamine; DOPAC, 3,4-Dihydroxyphenylacetic acid; EP, epinephrine; HVA, homovanillic acid; NE, norepinephrine; TRP, tryptophan.