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| Citation | Lee, J.Y., Bhatt, D., Bhatt, D., Chung, W.Y., Cooper, R.L. (2009). Furthering pharmacological and physiological assessment of the glutamatergic receptors at the Drosophila neuromuscular junction. Comp. Biochem. Physiol. C. Toxicol. Pharmacol. 150(4): 546--557. (Export to RIS) | ||
| FlyBase ID | FBrf0209026 | ||
| Publication Type | Research paper | ||
| PubMed ID | 19695344 | ||
| PubMed Abstract | Drosophila melanogaster larval neuromuscular junctions (NMJs) serve as a model for synaptic physiology. The molecular sequences of the postsynaptic glutamate receptors have been described; however, the pharmacological profile has not been fully elucidated. The postsynaptic molecular sequence suggests a novel glutamate receptor subtype. Kainate does not depolarize the muscle, but dampens evoked EPSP amplitudes. Quantal responses show a decreased amplitude and area under the voltage curve indicative of reduced postsynaptic receptor sensitivity to glutamate transmission. ATPA, a kainate receptor agonist, did not mimic kainate's action. The metabotropic glutamate receptor agonist t-ACPD had no effect. Domoic acid, a kainate/AMPA receptor agonist, blocks the postsynaptic receptors without depolarizing the muscle. However, SYM 2081, a kainate receptor agonist, did depolarize the muscle and reduce the EPSP amplitude at 1 mM but not at 0.1 mM. This supports the notion that these are generally a quisqualate subtype receptors with some oddities in the pharmacological profile. The results suggest a direct postsynaptic action of kainate due to partial antagonist action on the quisqualate receptors. There does not appear to be presynaptic auto-regulation via a kainate receptor subtype or a metabotropic auto-receptor. This study aids in furthering the pharmokinetic profiling and specificity of the receptor subtypes. | ||
| DOI | 10.1016/j.cbpc.2009.08.002 | ||
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| Language of Publication | English | ||
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| Publication Type | Journal | ||
| Abbreviation | Comp. Biochem. Physiol. C. Toxicol. Pharmacol. | ||
| Title | Comparative biochemistry and physiology. Toxicology & pharmacology : CBP | ||
| Publication Year | 2000-- | ||
| ISBN/ISSN | 1532-0456 | ||
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Data from Reference
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| Genes (35)
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