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Peripherally selective DDCIs incapable of crossing the protective blood–brain barrier (BBB) are used in augmentation of L-DOPA (levodopa) in the treatment of Parkinson's disease (PD) to block the conversion of L-DOPA into dopamine outside the brain, for the purpose of reducing adverse side effects. [3]
l-DOPA can be manufactured and in its pure form is sold as a drug with the INN Tooltip International Nonproprietary Name levodopa. Trade names include Sinemet, Pharmacopa, Atamet, and Stalevo. As a drug, it is used in the clinical treatment of Parkinson's disease and dopamine-responsive dystonia. l-DOPA has a counterpart with opposite chirality ...
DopAmide, or L-DopAmide, is a synthetic levodopa (L-DOPA) analogue that can serve as a levodopa and dopamine prodrug and is of potential interest in the treatment of Parkinson's disease. [ 1 ] [ 2 ] [ 3 ] DopAmide has an amide rather than the carboxyl group of L -DOPA, [ 2 ] [ 3 ] which imparts greater water solubility .
Levodopa (L-DOPA), a prodrug of dopamine which is used to treat Parkinson's disease and certain other conditions. A neurotransmitter prodrug, or neurotransmitter precursor, is a drug that acts as a prodrug of a neurotransmitter. A variety of neurotransmitter prodrugs have been developed and used in medicine.
The drug is a centrally permeable monoamine precursor and prodrug of dopamine and hence acts as a dopamine receptor agonist. [3] Chemically, levodopa is an amino acid, a phenethylamine, and a catecholamine. [3] Levodopa was first synthesized and isolated in the early 1910s. [3] The antiparkinsonian effects of levodopa were discovered in the ...
Levodopa is the immediate precursor to dopamine. Entacapone is a selective, reversible catechol- O -methyltransferase (COMT) inhibitor that prevents the degradation of levodopa. Entacapone does not cross the blood–brain barrier.
Dopamine receptors are a class of G protein-coupled receptors that are prominent in the vertebrate central nervous system (CNS) and are implicated in many neurological processes, including motivational and incentive salience, cognition, memory, learning, and fine motor control, as well as modulation of neuroendocrine signaling.
In normal dopamine and serotonin (5-HT) neurotransmitter synthesis, AADC is not the rate-limiting step in either reaction. However, AADC becomes the rate-limiting step of dopamine synthesis in patients treated with L -DOPA (such as in Parkinson's disease ), and the rate-limiting step of serotonin synthesis in people treated with 5-HTP (such as ...