Neuropharmacology Poster Session



Materials & Methods


Discussion & Conclusion



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A Fully Reversible Crustacean Glutamate Receptor Antagonist

Klose, M (Department of Biology, Brock Unversity, Canada)
Mercier, A (Department of Biology, Brock University, Canada)
Atkinson, J (Depatment of Chemistry, Brock University, Canada)

Contact Person: Markus K Klose (mk97ar@badger.ac.brocku.ca)


Many phenolic polyamines naturally found in a variety of plants, especially the Solanacea such as tomatoes, show similarities to spider and wasp toxins and may be partially responsible for pest resistance in plants. This study investigates the effects of one of these, N1-coumaroyl spermidine (N1CS), on the synapses of the deep extensor muscles of Procambarus clarkii. N1CS reduced the amplitude of excitatory postsynaptic potentials in a dose dependant manner. The EC50 value for this effect is estimated to be between 0.1mM and 0.03mM. N1CS also blocked responses to iontophoretic application of glutamate in muscle treated with concanavalin A to reduce desensitization. 0.03 mM N1CS blocked these responses by more than 75%, and the effect was completely reversed by washing for about 7 minutes. Thus N1CS blocks glutamate receptors on crayfish muscle reversibly.

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Poster Number PAklose 0724
Keywords: glutamate, receptor, antagonist, spermidine, crustacean

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Klose, M; Mercier, A; Atkinson, J; (1998). A Fully Reversible Crustacean Glutamate Receptor Antagonist. Presented at INABIS '98 - 5th Internet World Congress on Biomedical Sciences at McMaster University, Canada, Dec 7-16th. Available at URL http://www.mcmaster.ca/inabis98/neuropharm/klose0724/index.html
© 1998 Author(s) Hold Copyright