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Pharmacology Lab Report

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Pharmacology The preliminary evaluation of the titled compounds 7a-7o and 8a-8e were evaluated for anticonvulsant activity utilizing the predictable animal models and the neurotoxicity was assessed by rotorod test method. Of these, the MES and scPTZ seizure models represent the two animal seizure models, most widely used in the search for new anticonvulsants. Data are presented (Table II) after the 0.5 and 4 h time intervals at the dose level of 30, 100 and 300 mg/kg. Phenytoin and carbamazepine were used as the standard drugs for the comparison. Maximal electroshock seizure (MES) test is a proven method to check the generalized tonic-clonic seizure and identifies clinical candidates that prevent seizure spread. The synthesized compounds 7e, …show more content…

The GABA-transaminase enzyme has been found to be accountable for the metabolism of GABA, and therefore, inhibition of the enzyme will cause in an increased concentration of GABA in different brain areas. The results of the assay are presented in Table III. All four compounds were found to inhibit the GABA-T enzyme at the 4 h time period. Compound 7d was found to inhibit GABA-T almost throughout the time periods, but the full inhibition shown by 7d was 20% at 4 h. Compound 7n inhibited the enzyme at 1 h and maximum inhibition (12%) was detected at 4 h. Compound 7j demonstrated second maximum inhibition amongst these compounds. It displayed inhibition at 2 h and continued to inhibit the enzyme considerably throughout the time periods. Compound 8c exhibited less enzyme inhibition and maximum inhibition was witnessed at 4 h (11%). Only those compounds were selected for neurotoxicity screen which had shown the good or moderate anticonvulsant activity. Compound 7e showed considerable neurotoxicity at a dose of 100 mg/kg in the rotorod test, whereas compound 7i showed neurotoxicity at an increased dose of 300 mg/kg. The rest of the compounds are devoid of neurotoxicity in rotorod test. Compounds 7e, 7i and 8d showed an interaction with motor system, due to which they potentiated the effect of ethanol inducing the lateral position to the animals. The rest of the compounds did not show any interaction with ethanol at all (Table

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