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• W1540637944 endingPage "1586" @default.
• W1540637944 startingPage "1569" @default.
• W1540637944 abstract "In the insect antennal lobe different types of local interneurons mediate complex excitatory and inhibitory interactions between the glomerular pathways to structure the spatiotemporal representation of odors. Mass spectrometric and immunohistochemical studies have shown that in local interneurons classical neurotransmitters are likely to colocalize with a variety of substances that can potentially act as cotransmitters or neuromodulators. In the antennal lobe of the cockroach Periplaneta americana, gamma-aminobutyric acid (GABA) has been identified as the potential inhibitory transmitter of spiking type I local interneurons, whereas acetylcholine is most likely the excitatory transmitter of nonspiking type IIa1 local interneurons. This study used whole-cell patch clamp recordings combined with single-cell labeling and immunohistochemistry to test if the GABAergic type I local interneurons and the cholinergic type IIa1 local interneurons express allatotropin and tachykinin-related neuropeptides (TKRPs). These are two of the most abundant types of peptides in the insect antennal lobe. GABA-like and choline acetyltransferase (ChAT)-like immunoreactivity were used as markers for GABAergic and cholinergic neurons, respectively. About 50% of the GABA-like immunoreactive (-lir) spiking type I local interneurons were allatotropin-lir, and ∼40% of these neurons were TKRP-lir. About 20% of nonspiking ChAT-lir type IIa1 local interneurons were TKRP-lir. Our results suggest that in subpopulations of GABAergic and cholinergic local interneurons, allatotropin and TKRPs might act as cotransmitters or neuromodulators. To unequivocally assign neurotransmitters, cotransmitters, and neuromodulators to identified classes of antennal lobe neurons is an important step to deepen our understanding of information processing in the insect olfactory system. J. Comp. Neurol. 523:1569–1586, 2015. © 2015 Wiley Periodicals, Inc." @default.
• W1540637944 created "2016-06-24" @default.
• W1540637944 creator A5001454840 @default.
• W1540637944 creator A5052844897 @default.
• W1540637944 creator A5062591797 @default.
• W1540637944 date "2015-04-02" @default.
• W1540637944 modified "2023-09-24" @default.
• W1540637944 title "Colocalization of allatotropin and tachykinin-related peptides with classical transmitters in physiologically distinct subtypes of olfactory local interneurons in the cockroach<i>(Periplaneta americana)</i>" @default.
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• W1540637944 doi "https://doi.org/10.1002/cne.23757" @default.
• W1540637944 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25678036" @default.
• W1540637944 hasPublicationYear "2015" @default.
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