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Title: Tyramine injections reduce locust viability
Authors: Torfs, Herbert ×
Van Poyer, Wendy
Poels, Jeroen
Swinnen, Elfriede
De Loof, Arnold
Vanden Broeck, Jozef #
Issue Date: 2000
Publisher: Akademiai kiado
Series Title: Acta biologica hungarica vol:51 issue:2-4 pages:349-354
Abstract: In the locust nervous system, tyramine is the direct precursor for octopamine synthesis and, as an octopamine analogue, it can activate octopamine receptors. Furthermore, the identification of specific tyramine receptors in Locusta migratoria and Drosophila melanogaster suggests that it is an important transmitter or modulator candidate. In this paper, we report that repeated tyramine injections reduced the viability of last instar larvae of Locusta and Schistocerca. In addition, a retardation of the last ecdysis was observed as a sublethal effect of the repeated tyramine treatment. Moreover, egg deposition by adult females was also retarded and/or drastically reduced. These effects show similarity to sublethal effects described for certain "insecticidal" octopamine receptor agonists, such as formamidines and phenyliminoimidazolidines. Since certain formamidine compounds were also shown to be agonists for the cloned tyramine receptors, it cannot be excluded that some lethal or sublethal consequences of tyramine administration are the result of an interaction with specific tyramine receptors.
ISSN: 0236-5383
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Animal Physiology and Neurobiology Section - miscellaneous
Department of Biology - miscellaneous
Department of Cellular and Molecular Medicine - miscellaneous
Laboratory for Molecular Diagnosis
× corresponding author
# (joint) last author

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