Figure 9. Elevation of NE concentration in blood plasma in HIS rats.

(A) The concentration of NE in blood plasma was dramatically increased when tested at 6 hours after the last stressor and returned to control level when tested 1 week after termination of the last stressor (**p<0.01 vs. con n = 4 for control and 6 h group, n = 3 for 1 week group). (B) Expression of β₂-adrenoceptors in T₁₃-L₂ DRGs was not changed 6 hours after HIS (n = 4 for each group). (C) Expression of β₂-adrenoreceptors in the muscularis exerna of the colon was not changed 6 hours after HIS (n = 4 for each group).