GLUTAMATE Flashcards
glutamate is excitatory or inhibitory
excitatory
glutamate is ionized form of
glutamic acid
glutamate is formed by
glutamine by glutaminase
VGLUT
vesicular glutamate transporters
glutamate uptake
astrocytes with excitatory amino acid transporters
glutamine synthetase
converts glutamate to glutamine
glutaminase
converts glutamine to glutamate
glutamate functions
synaptic plasticity, learning and memory, psychopathologic disorders
glutamate ionotropic receptors
AMPA, kainate, NMDA
NMDA
allows Ca and Na to pass through, activates second messenger, binding site for Mg
NBQX
antagonist of AMPA and kainate, causes sedation and ataxia
NMDA activated
glutamate and co agonist (glycine or D-serine)
glutamate metabotropic receptors
mGluR1-mGluR8
I-AP4
selective agonist of mGluR4,6-8 auto receptors, suppress transmission
AMPA positive allosteric modulators are
cognitive enhancers
long term potentiation (LTP)
NMDA, persistent increase in synaptic strength because of burst of energy in pre synaptic neuron
excitotoxicity hypothesis
excessive exposure to glutamate causes prolonged depolarization of neurons leading to damage or death