Modulation of Ionic Currents by Metabotropic Glutamate Receptors in the CNS

  • Urs Gerber
  • Beat H. Gähwiler
Part of the The Receptors book series (REC)


Stimulation of neuronal metabotropic glutamate receptors (mGluRs) activates G-proteins initiating a multitude of intracellular processes. Electrophysiological observations indicate that ion channels are among the substrates for the intracellular messengers dispatched by activated mGluRs, thus modulating the electrical behavior of neurons owing to their coupling to numerous membrane ionic conductances. In some of the first experiments to demonstrate metabotropic effects of glutamate, electrophysiological techniques were employed using transfected oocytes to assay for changes in second-messenger levels in response to glutamate (Sugiyama et al., 1987, 1989). It has only recently been shown that activation of mGluRs can also modify the firing properties of neurons (Stratton et al., 1989, 1990; Baskys et al., 1990; Charpak et al., 1990; Desai and Conn, 1991).


Calcium Current Potassium Current Mossy Fiber Metabotropic Glutamate Receptor Cerebellar Granule Cell 
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© Springer Science+Business Media New York 1994

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  • Urs Gerber
  • Beat H. Gähwiler

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