“ Higenamine decreased the intracellular dopamine content dose-dependently and showed 55.2% inhibition of dopamine content in PC12 cells at a concentration of 20 microM with 24 h incubation.”
“The IC50 value of higenamine was 18.2 microM. Dopamine content was lowered and reached minimal level at 12-24 h after exposure to higenamine.”
“These results suggest that the inhibition of tyrosine hydroxylase activity by higenamine might partially contribute to the decrease in dopamine content in PC12 cells.”