l-dopa

L-DOPA (Levodopa) is an amino acid precursor of dopamine with antiparkinsonian properties. It is a prodrug converted to dopamine by DOPA decarboxylase and can cross the blood-brain barrier. In the brain, levodopa is decarboxylated to dopamine, stimulating dopaminergic receptors and compensating for depleted endogenous dopamine in Parkinson's disease. To ensure adequate concentrations reach the central nervous system, levodopa is administered with carbidopa, a decarboxylase inhibitor that does not cross the blood-brain barrier, reducing peripheral decarboxylation and increasing CNS dopamine delivery.

Trans-Clovamide (trans-Clovamide) is a naturally occurring caffeoyl conjugate identified in the antioxidant polyphenolic fraction of cocoa (T. cacao L.) Trans-Clovamide is a potent antioxidantand that has shown neuroprotective effects (EC50s = 0.9-3.7 µM) in several in vitro models of neuronal death. Trans-Clovamide is an excellent ROS and oxygen radical scavenger and also has anti-inflammatory and neuroprotective effects. Clovamide is an anti-microbial with activity against the human pathogens influenza A subtype H5N1, Trypanosoma evansi, and Heliobacter pylori.

Etilevodopa is an ethyl-ester prodrug of Levodopa which is used for the treatment of Parkinson's disease (PD). It is rapidly hydrolyzed to Levodopa and ethanol by nonspecific esterases in the gastrointestinal tract. Levodopa is the direct precursor of dop

3-(2,4-Dihydroxyphenyl)propanoic acid (Hydroumbellic acid) is a predicted metabolite generated by BioTransformer1 from the metabolism of 3-(2,4-dihydroxyphenyl)prop-2-enoic acid. It is produced by the abkar1 enzyme via a reduction-of-alpha-beta-unsaturated-compounds-pattern1 reaction in human gut microbiota.

Catalponol can enhance dopamine biosynthesis by inducing TH activity and protect against L-DOPA-induced cytotoxicity in PC12 cells, which was mediated by the increased levels of cyclic AMP.

6-Hydroxykaempferol is a competitive inhibitor of tyrosinase compared to L-DOPA, it shows also high antioxidant activities.

Gynosaponin TN-2, demonstrating anti-Parkinsonian activity, mitigates L-DOPA (100 and 200 μM)-induced apoptotic cell death in pheochromocytoma 12 cells through the modulation of extracellular signal-regulated protein kinases 1 and 2 activation.

1. beta-Asarone (Cis-Isoelemicin) may be a potential preventive drug for Alzheimer's disease. 2. Beta-Asarone prevents autophagy and synaptic loss by reducing ROCK expression in SAMP8 mice. 3. The co-administration of beta-Asarone(Cis-Isoasarone) and l-dopa may contribute to the treatment of 6-OHDA-induced damage in rats by inhibiting autophagy activity. 4. Beta-Asarone exhibits anti-inflammatory effects by suppressing the production of pro-inflammatory mediators through NF-κB signaling and the JNK pathways in activated microglial cells and might be developed as a promising candidate to treat various neuroinflammatory diseases.

Catalpalactone exhibits high antitermitic, and cytotoxic activities, it exhibits potent inhibitory effects on lipopolysaccharide-induced NO synthesis in RAW 264.7 cells , with IC50 values of 9.80 microM. Catalpalactone can inhibit dopamine biosynthesis by

Vanicoside E is an antioxidant and antitumor agent that inhibits L-Tyrosine and L-DOPA with IC50 values of 45.23 μM and 189.96 μM, respectively [1] [2].