Pricing updated 2019-04-24. Prices are subject to change without notice.
Dopamine is a neurotransmitter involved in synaptic plasticity, cognition, and the regulation of locomotor control. It is produced endogenously in the substantia nigra and ventral tegmental area but when administered exogenously cannot cross the blood brain barrier. L-DOPA is a metabolic precursor of dopamine that is capable of crossing the blood brain barrier.1 It is produced from L-tyrosine by tyrosine hydroxylase and metabolized by catechol-O-methyl transferase (COMT). In the brain L-DOPA is converted to dopamine. Formulations containing L-DOPA have been used to increase dopamine concentrations in the brain as a treatment for Parkinson’s disease and stroke recovery.
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1. Berends, H.I., Nijlant, J.M.M., Movig, K.L.L., et al. The clinical use of drugs influencing neurotransmitters in the brain to promote motor recovery after stroke; a Cochrane systematic review Eur. J. Phys. Rehabil. Med. 45(4), 621-630 (2009).