Vigabatrin exhibits a broad range of bioactivities and pharmacological properties. It demonstrates significant anticonvulsive activity in bicuculline (BIC) and picrotoxin (PCR) induced seizure tests in mice, with effective doses (ED50) of 220.0 umol.kg^-1 and 210.0 umol.kg^-1, respectively. Moreover, at a dosage of 100 mg/kg, it provides sustained protection against picrotoxin-induced convulsions. In terms of metabolism, Vigabatrin has a very short half-life of 0.005 hours at a concentration of 1 mM and a dissociation constant (pKa) of 9.5. It inhibits GABA transaminase (GABA-T) activity in vivo with an IC50 value of 41,210.0 nM and increases brain GABA levels, suggesting potential implications for regulating GABA neurotransmission in the brain.
The compound also shows various activities in vitro; it inhibits gamma-aminobutyric acid aminotransferase from the pig brain with a Ki of 3200000.0 nM and a K inact rate of 0.37 min^-1, as well as rat GABA-AT with a Ki of 10,000,000.0 nM. Vigabatrin exhibits inhibitory activity against several human transporters, including BSEP, MRP2, MRP3, and MRP4, with IC50 values greater than 133000.0 nM. While it indicates moderate hepatic toxicity and potential retinotoxicity in specific test conditions, it shows no significant hepatic side effects and good aqueous solubility characteristics.
Additionally, Vigabatrin demonstrates significant penetration and inhibition activities related to sodium fluorescein uptake in OATP1B1 and OATP1B3-transfected CHO cells. It has been evaluated for potential antiviral activity against SARS-CoV-2, showing some level of inhibition of virus-induced cytotoxicity and 3CL-Pro protease activity. It also shows a range of potencies in bioactivity assays against various targets, including enzymes and receptors, albeit mostly with high AC50 values, indicating relatively weak interactions.
Overall, Vigabatrin has shown potential in modulating GABAergic activity and various other bioactivities, but further investigation is needed to fully understand its pharmacological profile and therapeutic potential..
Note: Summary generated by AI. Data source: ChEMBL 