| Group | Ach (μmol/mg) | Expression of M2 receptors | Expression of M3 receptors | cAMP (mmol/mg) | PKA (pg/ml) |
| Control group | 3.42 ± 0.40 | 0.117 ± 0.004 | 0.181 ± 0.004 | 13.52 ± 0.60 | 0.463 ± 0.045 |
| Model group | 3.37 ± 0.51 | 0.215 ± 0.004** | 0.130 ± 0.002** | 10.63 ± 0.80* | 0.320 ± 0.051* |