OCT

Hydrastine ((-)-β-Hydrastine; (1R,9S)-β-Hydrastine) selectively inhibits the organic cation transporter OCT1, with an IC50 value of 6.6 μM. This compound also acts as a competitive inhibitor of tyrosine hydroxylase, reducing dopamine biosynthesis with an IC50 of 20.7 μM in PC12 cells. Hydrastine is particularly relevant for research into Parkinson's disease, as it may induce neuronal toxicity through mitochondrial dysfunction and has the potential to exacerbate apoptosis when used in conjunction with L-DOPA.