IgG isolated from LP-BM5 infected mouse brain activates ionotropic glutamate receptors

Anthony S. Basile, Elena Koustova, P. Ioan, S. Rizzoli, Michael A Rogawski, Peter N R Usherwood

Research output: Contribution to journalArticle

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Abstract

Biochemical and immunological studies have shown that mice infected with LP-BM5 virus develop antibodies to ionotropic glutamate receptors. Here, IgG isolated from brain of infected mice has been tested electrophysiologically on cultured rat cortical and hippocampal neurons. The IgG elicited glycine-independent currents that reversed at ∼0 mV. Equivalent concentrations of IgG from uninfected mice were inactive. The glycine-independent currents were less influenced by DNQX and GYKI-52466 than currents elicited by AMPA and KA. The IgG also elicited glycine-dependent currents that reversed at -10 mV and were blocked by dI-AP5, 5,7-DCKA, and polyamine amides. Glycine-dependent and -independent currents were unaffected by tetrodotoxin, strychnine, the transmembrane Cl- gradient or d-tubocurare. Although part of the glycine-independent current remains uncharacterized, these results confirm that a virus-induced immunopathology produces IgG clones that activate ionotropic glutamate receptors and that could, thereby, contribute to the excitotoxic neurological syndrome observed in LP-BM5-infected mice.

Original languageEnglish (US)
Pages (from-to)1069-1081
Number of pages13
JournalNeurobiology of Disease
Volume8
Issue number6
DOIs
StatePublished - 2001
Externally publishedYes

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Ionotropic Glutamate Receptors
Glycine
Immunoglobulin G
Brain
Viruses
Tubocurarine
Strychnine
alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid
Tetrodotoxin
Polyamines
Amides
Clone Cells
Neurons
Antibodies

ASJC Scopus subject areas

  • Neurology

Cite this

IgG isolated from LP-BM5 infected mouse brain activates ionotropic glutamate receptors. / Basile, Anthony S.; Koustova, Elena; Ioan, P.; Rizzoli, S.; Rogawski, Michael A; Usherwood, Peter N R.

In: Neurobiology of Disease, Vol. 8, No. 6, 2001, p. 1069-1081.

Research output: Contribution to journalArticle

Basile, Anthony S. ; Koustova, Elena ; Ioan, P. ; Rizzoli, S. ; Rogawski, Michael A ; Usherwood, Peter N R. / IgG isolated from LP-BM5 infected mouse brain activates ionotropic glutamate receptors. In: Neurobiology of Disease. 2001 ; Vol. 8, No. 6. pp. 1069-1081.
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AU - Usherwood, Peter N R

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