Anticonvulsants inhibit rat neuronal somatostatin release.

Abstract

Somatostatin (SRIF), a peptide widely distributed in the central nervous system, has been implicated in the genesis of seizure activity in a number of animal models of epilepsy. We examined the effects of the anticonvulsants, phenytoin, carbamazepine and diazepam, on the release of SRIF from dispersed adult rat neuronal cells in short-term culture. Each of these agents caused dose-dependent inhibition of ouabain-stimulated SRIF release in a well-characterized hypothalamic dispersed cell system. We also examined the effects of phenytoin on SRIF release from dispersed rat cortical cells and inhibition of stimulated SRIF secretion was again observed. These findings support the hypothesis that the inhibition of neuronal SRIF release may represent a pharmacological mechanism of action of anticonvulsants.

• Authors: S B Richardson, S Twente
• Journal: Brain research (Brain Res) Vol. 571 Issue 2 Pg. 230-4 (Feb 07 1992) ISSN: 0006-8993 [Print] Netherlands
• PMID: 1351779 (Publication Type: Journal Article, Research Support, U.S. Gov't, Non-P.H.S.)

Chemical References

• Anticonvulsants
• Carbamazepine
• Somatostatin
• Ouabain
• Phenytoin
• Diazepam

Topics

• Animals
• Anticonvulsants (pharmacology)
• Carbamazepine (pharmacology)
• Diazepam (pharmacology)
• Dose-Response Relationship, Drug
• Hypothalamus (metabolism)
• In Vitro Techniques
• Kinetics
• Male
• Neurons (drug effects, metabolism)
• Ouabain (pharmacology)
• Phenytoin (pharmacology)
• Radioimmunoassay
• Rats
• Rats, Inbred Strains
• Somatostatin (metabolism)