HOMEPRODUCTSCOMPANYCONTACTFAQResearchDictionaryPharmaSign Up FREE or Login

Effect of experimental Escherichia coli meningitis on concentrations of excitatory and inhibitory amino acids in the rabbit brain: in vivo microdialysis study.

Abstract
Excessive extracellular fluid concentrations of the amino acids glutamate and aspartate play an important role in the pathogenesis of neuronal cell damage during hypoxia, hypoglycemia, and seizure. The purpose of these investigations was to test the hypothesis that bacterial meningitis causes progressive increase in excessive extracellular fluid concentrations of excitatory and inhibitory neurotransmitters. To test this hypothesis, Escherichia coli was injected intracisternally in juvenile rabbits after which neurotransmitter concentrations were measured with in vivo microdialysis. The data showed significant elevation of the excitatory amino acids aspartate and glutamate, as well as of the inhibitory neurotransmitters gamma-amino butyric acid and taurine in the excessive extracellular fluid of animals injected with E. coli compared with control animals injected with saline. However, concentrations of these excitatory and inhibitory amino acids rose late in the course of meningitis, at a time when the animals were hypotensive (mean blood pressure < or = 40 mm Hg). These data show that the major increase in excitatory neurotransmitters during experimental meningitis occurs in association with the cerebral ischemia produced by septic shock rather than being produced by the meningitis itself.
AuthorsV L Perry, R S Young, W J Aquila, M J During
JournalPediatric research (Pediatr Res) Vol. 34 Issue 2 Pg. 187-91 (Aug 1993) ISSN: 0031-3998 [Print] United States
PMID7901833 (Publication Type: Journal Article, Research Support, U.S. Gov't, P.H.S.)
Chemical References
  • Amino Acids
  • Glutamates
  • Neurotransmitter Agents
  • Taurine
  • Aspartic Acid
  • Glutamic Acid
  • gamma-Aminobutyric Acid
Topics
  • Amino Acids (metabolism)
  • Animals
  • Aspartic Acid (metabolism)
  • Blood Pressure
  • Brain (metabolism)
  • Cerebrovascular Circulation
  • Disease Models, Animal
  • Escherichia coli Infections (metabolism, physiopathology)
  • Extracellular Space (metabolism)
  • Glutamates (metabolism)
  • Glutamic Acid
  • Meningitis, Bacterial (metabolism, physiopathology)
  • Microdialysis
  • Neurotransmitter Agents (metabolism)
  • Rabbits
  • Taurine (metabolism)
  • gamma-Aminobutyric Acid (metabolism)

Join CureHunter, for free Research Interface BASIC access!

Take advantage of free CureHunter research engine access to explore the best drug and treatment options for any disease. Find out why thousands of doctors, pharma researchers and patient activists around the world use CureHunter every day.
Realize the full power of the drug-disease research graph!


Choose Username:
Email:
Password:
Verify Password:
Enter Code Shown: