Abstract
The olfactory epithelium has the ability to respond to a large number of volatile compounds of small molecular weight. Ultimately, such a property lies on a specialized type of neuron, the olfactory receptor cell. In the presence of odorants, the olfactory receptor neuron responds with action potentials whose frequency depends on odorant concentration. The primary events in the process of olfactory transduction are thought to occur at the cilia of olfactory receptor neurons and involve the binding of odorants to receptor molecules followed by the opening of ion channels. A crucial step in understanding olfactory transduction requires identifying the mechanisms that regulate the electrical activity of olfactory cells. In the last couple of years, patch-clamp recording from isolated olfactory cells and reconstitution of olfactory membranes in planar lipid bilayers have begun to shed light on some of these mechanisms. Although the information emerging from such studies is still preliminary, there are already well-defined hypotheses on the molecular events that might underlie the primary events in olfactory transduction. Currently, attention is being focused on the notions that second messengers might be involved in the activation of ion channels in olfactory cilia, and that odorant binding to a receptor molecule might lead directly to the gating of ion channels in chemosensory olfactory membranes. The coming years promise to be exciting ones in the field of olfactory transduction. We have now the necessary tools to be able to confront hypotheses and experimental facts.
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References
Anholt, R. R. H. (1987).Trends Biochem. 12, 58–62.
Anholt, R. R. H., Aebi, U., and Snyder, S. H. (1986).J. Neurosci. 6, 1962–1969.
Anholt, R. R. H., Mumby, S. M., Stoffers, D. A., Girard, P. R., Kuo, J. F., and Snyder, S. H. (1987).Biochemistry 26, 788–795.
Baylin, F. (1979).J. Gen. Physiol. 74, 17–36.
Baylin, F., and Moulton, D. G. (1979).J. Gen. Physiol. 74, 37–55.
Coronado, R., and Labarca, P. (1984).Trends Neurosci. 7, 155–160.
Fenwick, E. M., Marty, A., and Neher, E. (1982).J. Physiol. (Lond.)331, 577–597.
Getchell, T. V. (1986).Physiol. Rev. 66, 772–817.
Getchell, T. V., and Shepherd, G. M. (1978a).J. Physiol. (Lond.)282, 521–540.
Getchell, T. V., and Shepherd, G. M. (1978b).J. Physiol. (Lond.)282, 541–560.
Kashiwanayagi, M., Sai, K., and Kurihara, K. (1978).J. Gen. Physiol. 89, 443–457.
Labarca, P., Simon, S. A., and Anholt, R. R. H. (1988).Proc. Natl. Acad. Sci. USA (in press).
Lancet, D. (1986).Annu. Rev. Neurosci. 9, 329–355.
Land, L. J., and Shepherd, G. M. (1974).Brain Res. 70, 506–510.
Masukawa, L. M., Hedlund, B., and Shepherd, G. M. (1985).J. Neurosci. 5, 128–135.
Maue, R., and Dionne, V. E. (1987).J. Gen. Physiol. 90, 95–125.
Menco, B. P. M. (1980).Cell Tissue Res. 211, 5–29.
Miller, C. (1986). InIonic Channels in Cells and Model Systems (Latorre, R., ed.), Plenum Press, New York.
Mueller, P., and Rudin, D. O. (1969). InLaboratory Techniques of Membrane Biophysics (Passow, M., and Stampfli, R., eds.), Springer-Verlag, Berlin.
Nakamura, T., and Gold, C. (1987).Nature 325, 442–444.
Nakamura, T., and Gold, C. (1988).10th Annual Meeting, Association of Chemoreceptor Sciences [abstr.].
O'Connell, R. J., and Mozell, M. M. (1968).J. Neurophysiol. 32, 51–63.
Okano, M., and Takagi, S. F. (1974).J. Physiol. (Lond.)242, 353–370.
Ottoson, D. (1956).Acta Physiol. Scand. 35, Suppl. 122, 1–83.
Pace, U., Hanski, E., Salomon, Y., and Lancet, D. (1985).Nature 316, 255–258.
Sharp, F. R., Kauer, J. S., and Shepherd, G. M. (1975).Brain Res. 98, 596–600.
Shepherd, G. M. (1972).Physiol. Rev. 52, 864–917.
Shepherd, G. M. (1983).Neurobiology. Oxford University Press, New York.
Sicard, G., and Holley, A. (1984).Brain Res. 292, 283–296.
Sklar, P. B., Anholt, R. R. H., and Snyder, S. (1986).J. Biol. Chem. 261, 15538–15543.
Stewart, W. B. J., Kauer, J. S., and Shepherd, G. M. (1979).J. Comp. Neurol. 185, 715–734.
Suzuki, N. (1982). InChemoreception in Fishes (Hara, T. J. ed.), New York, Elsevier, pp. 93–108.
Trotier, D. (1986).Pflugers Arch. 407, 589–595.
Trotier, D., and MacLeod, P. (1983).Brain Res. 268, 225–237.
Vodyanoy, V., and Murphy, R. B. (1983).Science 220, 717–719.
Vodyanoy, V., and Vodyanoy, I. (1987).Neurosci. Lett. 73, 253–258.
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Labarca, P., Bacigalupo, J. Ion channels from chemosensory olfactory neurons. J Bioenerg Biomembr 20, 551–569 (1988). https://doi.org/10.1007/BF00768919
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DOI: https://doi.org/10.1007/BF00768919