Behavioral and histochemical studies demonstrated that endogenous tryptophan metabolites – kynurenines – play a role in the long-term retention of memory traces and the functioning of key components in the (GluR–LIMK1– F-actin) signaling cascade, which mediates these functions. Kynurenine deficiency induced by injections of allopurinol (a tryptophan oxygenase inhibitor) inhibited long-term memory, decreased the level of expression of LIMK1, and produced a paradoxical increase in the F-actin level in the cerebral ganglion in bees. These results are consistent with our previous data obtained in Drosophila with a mutation in the structural gene for tryptophan oxygenase, i.e., the vermilion mutation.
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Translated from Zhurnal Vysshei Nervnoi Deyatel’nosti imeni I. P. Pavlova, Vol. 60, No. 2, pp. 229–235, March–April, 2010.
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Lopatina, N.G., Zachepilo, T.G., Chesnokova, E.G. et al. Behavioral and Molecular Consequences of Deficiency of Endogenous Kynurenines in Honeybees (Apis mellifera L.). Neurosci Behav Physi 41, 626–631 (2011). https://doi.org/10.1007/s11055-011-9465-y
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DOI: https://doi.org/10.1007/s11055-011-9465-y