Brain Levels of N-acylethanolamine Phospholipids in Mice During Pentylenetetrazol-induced Seizure

Overview

Journal Lipids

Specialty Biochemistry

Date 2003 Jul 10

PMID 12848283

Citations 2

Authors

Birthe Moesgaard

Henrik H Hansen

Suzanne L Hansen

Steen Honore Hansen

Gitte Petersen

Harald S Hansen

Affiliations

Soon will be listed here.

Abstract

The N-acylethanolamine phospholipids (NAPE) are precursors for N-acylethanolamines (NAE), including anandamide (20:4-NAE), which is a ligand for the cannabinoid receptors. Previously, NAPE were believed to be found only in injured tissue, e.g., after neurodegenerative insults. Neuronal injury may occur in response to seizure activity. Therefore, we investigated the effect of pentylenetetrazol (PTZ)-induced seizures in PTZ-kindled mice on the level of NAPE in the brain. Male NMRI mice were kindled with PTZ injections 3 times/wk, thereby developing clonic seizures in response to PTZ. Mice were killed within 30 min after the clonic seizure on the test day (12th injection) and the brains were collected. Eight species of NAPE were analyzed as the glycerophospho-N-acylethanolamines by high-performance liquid chromatography-coupled electrospray ionization mass spectrometry. No effect of the PTZ kindling on the NAPE levels in murine brains was observed. Total NAPE in control mice cortex (n = 4) was 16.4 +/- 3.0 micromol/g wet weight of which 20:4-NAPE accounted for 3.6 mol%, and the major species was 16:0-NAPE, accounting for 52.1 mol%. Determination of the activity of NAPE-hydrolyzing phospholipase D and of N-acyltransferase in brain membrane preparations from adult and 3-d-old mice revealed an enzyme pattern in the adult mice that was favorable for NAE accumulation as opposed to NAPE accumulation. Thus, there was no difference in NAPE levels; at present, however, this does not exclude that NAE may accumulate during seizure.

Citing Articles

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