Abstract
Synaptic blockers are rather ineffective in blocking the carotid nerve discharge elicited by “natural” stimuli such as hypoxia, hypercapnia or acidity. At the same time, these drugs are quite effective in eliminating the effects produced by exogenous applications of excitatory transmitters. It is likely that the release of multiple transmitters by the natural stimuli prevents a single synaptic blocker from being effective. However, we propose an additional mechanism for this failure: electric coupling between carotid nerve terminals and glomus cells via gap junctions.
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References
Abudara, V., Garces, G., and Saez J.C., 1999, Cells of the carotid body express connexin43 which is up-regulated by cAMP. Brain Res. 849: 25–33.
Abudara V., Eyzaguirre, C., and Saez, J.C., 2000, Short-and long-term regulation of rat carotid body gap junctions by cAMP. Identification and regulation of connexin43, a gap junction subunit. Adv. Exper. Med. Biol. 475: 359–370.
Eyzaguirre, C., Jiang, R.G., and Abudara,V., 2002, Electric and dye coupling between rat carotid body cells and between these cells and carotid nerve endings. In: Oxygen Sensing: Responses and Adaptation to Hypoxia. (S. Lahiri, G. Semenza and N. Prabhakar, eds). Marcel Dekker, NY (in press).
Hayashida, Y., Koyano, H., and Eyzaguirre, C., 1980, An intracellular study of chemosensory fibers and endings. J. Neurophysiol. 44: 1077–1088.
Kondo, H., and Iwasa, H., 1996, Re-examination of the carotid body ultrastructure with special attention to intercellular membrane appositions. Adv. Exper. Med. Biol. 410: 45–50.
Kondo, H., 2002, Are there gap junctions between chief (Glomus, Type I) cells in the carotid body chemoreceptor ? Microsc. Res.Tech. 59: 227–233.
McDonald, D.M., 1981, Peripheral chemoreceptors: Structure-function relationships of the carotid body. In: Regulation of Breathing. (T.F. Hornbein, ed.). Marcel Dekker, NY, pp 105–319.
Monti-Bloch, L., Abudara, V., and Eyzaguirre, C., 1993, Electrical communication between glomus cells of the rat carotid body. Brain Res. 622: 119–131.
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Jiang, R.G., Eyzaguirre, C. (2003). Dye and Electric Coupling between Carotid Nerve Terminals and Glomus Cells. In: Pequignot, JM., Gonzalez, C., Nurse, C.A., Prabhakar, N.R., Dalmaz, Y. (eds) Chemoreception. Advances in Experimental Medicine and Biology, vol 536. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-9280-2_32
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DOI: https://doi.org/10.1007/978-1-4419-9280-2_32
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