NDLI: Inhibitory receptor binding events among the components of complex mixtures contribute to mixture suppression in responses of olfactory receptor neurons of spiny lobsters

Content Provider	Springer Nature Link
Author	Cromarty, S. I. Derby, C. D.
Copyright Year	1998
Abstract	Responses of olfactory receptor neurons of spiny lobsters Panulirus argus to two-component mixtures can be shaped by inhibitory events such as odor-activated hyperpolarizations and inhibition of odor-receptor binding (Daniel et al. 1996). In the current study, we extend this analysis to complex mixtures by examining responses of spiny lobster olfactory receptor neurons to mixtures containing up to seven odorants, consisting of adenosine-5′-monophosphate, ammonium, betaine, l-cysteine, l-glutamate, dl-succinate, and taurine. The response to a mixture was often less than the response to its most excitatory component. The effect of adding an excitatory odorant to a mixture depended on olfactory receptor neuron type, composition of the mixture, and which compound was added. In some cases the added excitatory compound had no effect or even decreased the mixture's response intensity, thus demonstrating nonlinear contributions of the components. Response intensities predicted by a noncompetitive model, which is most representative of these olfactory receptor neurons, were improved when the model included a term for empirical measurements of inhibitory binding interactions, suggesting that inhibitory binding interactions are one mechanism contributing to mixture suppression. This model's predictions were accurate for binary mixtures but not for larger mixtures, suggesting that additional inhibitory mechanisms are needed to account for mixture interactions in complex mixtures.
Starting Page	699
Ending Page	707
Page Count	9
File Format	PDF
ISSN	03407594
Journal	Journal of Comparative Physiology A
Volume Number	183
Issue Number	6
e-ISSN	14321351
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-12-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Physiology Behavioral Neuroscience Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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