Table 1.
Time course of changes in NA levels (ng/mg protein) within different brain areas following various dosing paradigms of fusaric acid.
STRIATUM | FRONTAL CORTEX | HIPPOCAMPUS | CEREBELLUM | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
1 h | 4 h | 8 h | 1 h | 4 h | 8 h | 1 h | 4 h | 8 h | 1 h | 4 h | 8 h | |
Control | 0.90± 0.20 | 0.89± 0.04 | 1.03± 0.20 | 3.87± 0.19 | 3.56± 0.10 | 3.98± 0.62 | 4.08± 0.27 | 3.97± 0.24 | 4.03± 0.30 | 3.66± 0.32 | 3.43± 0.21 | 3.81± 0.31 |
FA 20mg/kg×1 | 0.71± 0.01 | 0.80± 0.04 | 1.10± 0.30 | 3.40± 0.21 | 3.22± 0.31 | 3.85± 0.40 | 3.62± 0.31 | 3.50± 0.21 | 3.46± 0.29 | 3.21± 0.25 | 3.06± 0.22 | 3.49± 0.29 |
FA 20mg/kg×2 | 0.68± 0.10 | 0.50± 0.01* | 0.58± 0.11* | 2.10± 0.33* | 1.80± 0.22* | 1.84± 0.31* | 2.13± 0.21* | 1.75± 0.19* | 1.91± 0.20* | 2.08± 0.14* | 1.96± 0.15* | 2.20± 0.17* |
FA 40mg/kg×1 | 0.11± 0.01 a | ND | 0.60± 0.30* | 1.56± 0.21* | 1.06± 0.22* | 1.45± 0.27* | 0.64± 0.19§ | 0.53± 0.12§ | 0.78± 0.21§ | 1.80± 0.15§ | 1.02± 0.12§ | 2.07± 0.18§ |
FA 40mg/kg×2 | ND | ND | ND | 0.70± 0.10§ | 0.49± 0.20§ | 0.53± 0.15§ | 0.30± 0.09§ | 0.18± 0.07§ | 0.22± 0.18§ | 0.59± 0.11§ | 0.29± 0.08§ | 0.37± 0.10§ |
Noradrenaline levels were measured in male C57/B1 mice at various time intervals after administration of either saline or different dosing of the DBH inhibitor, fusaric acid (20 mg/kg ×1 and ×2 or 40 mg/kg ×1 or ×2, 2 h apart) to induce a loss of NA. Results were obtained from 5 mice per group and are expressed as mean ±SEM values, in ng/mg of protein.
Differences among groups were evaluated using ANOVA with Sheffè's post hoc analysis:
p<0.05 compared with controls.
p<0.05 compared with control and lower dosing of FA.