Accession Number : ADA259398


Title :   Genetically Epilepsy-Prone Rats Have Increased Brain Regional Activity of an Enzyme Which Liberates Glutamate from N-acetyl-aspartyl-glutamate


Corporate Author : WALTER REED ARMY INST OF RESEARCH WASHINGTON DC


Personal Author(s) : Meyerhoff, James L ; Carter, Ruth E ; Yourick, Debra L ; Slusher, Barbara S ; Coyle, Joseph T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a259398.pdf


Report Date : Jan 1992


Pagination or Media Count : 5


Abstract : N-Acetylated-alpha-linked acidic dipeptidase (NAALADase) is a membrane-bound peptidase which hydrolyzes the endogenous neuropeptide N- acetylaspartylglutamate (NAAG) to N-acetylaspartate (NAA) and the excitatory amino acid, glutamate (Glu). Although there is evidence that NAAG might be a neurotransmitter, this dipeptide could also function as a precursor form of Glu, which is liberated by the dipeptidase. We found that the activity of this NAAG hydrolyzing enzyme in genetically epilepsy-prone rats was 11-26% greater than control in brain regions, including the amygdala, hippocampus and cerebellum, as well as the pyriform, entorhinal and frontal cortices. This is consistent with possible increased availability of Glu in certain CNS synapses in these rats, which are reported to have increased susceptibility to audiogenically, electrically and chemically induced convulsions....Genetics, Hippocampus, Epilepsy, NAAG.


Descriptors :   *HIPPOCAMPUS , *EPILEPSY , CONTROL , FUNCTIONS , BRAIN , RATS , PRECURSORS , ENZYMES , REGIONS , PEPTIDE HYDROLASES , CEREBELLUM , AVAILABILITY , MEMBRANES , NEUROTRANSMITTERS , SYNAPSE , ADHESIVES , AMINO ACIDS , ACIDS


Subject Categories : Biochemistry
      Medicine and Medical Research


Distribution Statement : APPROVED FOR PUBLIC RELEASE