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Potent oral anticonvulsant action of CPP and CPPene in DBA/2 mice
A G Chapman1, J Graham, B S Meldrum
1Department of Neurology, Institute of Psychiatry, De Crespigny Park, London, U.K.
European Journal of Pharmacology
|March 13, 1990
Summary
3-(2-carboxypiperazine-4-yl)-1-phosphonate) (CPP) and its analogue CPPene demonstrate significant anticonvulsant effects in mice. These compounds effectively reduce seizures, with D(-)-CPPene showing the highest potency in preclinical models.
Area of Science:
- Neuroscience
- Pharmacology
- Biochemistry
Background:
- Epilepsy is a neurological disorder characterized by recurrent seizures.
- Developing effective anticonvulsant therapies remains a critical area of research.
- Phosphonate compounds have shown promise as therapeutic agents for neurological conditions.
Purpose of the Study:
- To evaluate the anticonvulsant activity of CPP (3-(2-carboxypiperazine-4-yl)-1-phosphonate) and its unsaturated analogue, CPPene.
- To compare the efficacy of different stereoisomers and formulations of these compounds.
- To determine the dose-response relationship and pharmacokinetic profiles of CPP and CPPene.
Main Methods:
- Administration of CPP and CPPene via intraperitoneal (i.p.) and oral routes in DBA/2 mice.
- Assessment of anticonvulsant activity against sound-induced clonic seizures.
- Calculation of ED50 values to quantify drug potency.
- Evaluation of time-to-peak effect for both administration routes.
Main Results:
- Both CPP and CPPene exhibited potent anticonvulsant activity.
- D(-)-CPPene demonstrated the highest potency with an i.p. ED50 of 1.54 mumol/kg.
- Oral administration showed lower potency, with D(-)-CPPene having an ED50 of 40.19 mumol/kg, indicating significant bioavailability.
- Peak protection occurred within 1-2 hours after i.p. administration and 3-4 hours after oral administration.
Conclusions:
- CPP and CPPene are effective anticonvulsants with potent activity against sound-induced seizures in a relevant mouse model.
- D(-)-CPPene is the most potent analogue, suggesting stereochemistry plays a role in efficacy.
- The route of administration significantly impacts the observed potency, highlighting the importance of pharmacokinetic considerations for therapeutic development.