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Narusuye, K. et al.

Linalool suppresses voltage-gated currents in sensory neurons and cerebellar Purkinje cells.

Linalool is a major component of essential oils and possesses various biological effects in sensory or central nervous systems. To investigate the pharmacological and biophysical effects of linalool on voltage-gated currents in sensory neurons, we used the whole-cell patch clamp and the Ca(2+) imaging techniques. Under the voltage clamp, membrane depolarization generated time- and voltage-dependent current responses in newt olfactory receptor cells (ORCs). Linalool significantly and reversibly suppressed the voltage-gated currents in ORCs. The dose-suppression relation of linalool for the voltage-gated Na(+) current could be fitted by the Hill equation with a half-blocking concentration of 0.56 mM and a Hill coefficient of 1. 2. To test whether linalool suppresses voltage-gated currents in ORCs specifically or suppresses currents in other neurons generally, we next examined the effects of linalool on voltage-gated currents in newt retinal neurons and rat cerebellar Purkinje cells. Linalool suppressed the voltage-gated currents not only in retinal horizontal cells and ganglion cells but also in Purkinje cells. Furthermore, bath application of linalool inhibited the KCl-induced [Ca(2+)](i) response of ORCs, suggesting that linalool suppresses Ca(2+) currents in ORCs. These results suggest that linalool non-selectively suppresses the voltage-gated currents in newt sensory neurons and rat cerebellar Purkinje cells.[1]

References

Linalool suppresses voltage-gated currents in sensory neurons and cerebellar Purkinje cells. Narusuye, K., Kawai, F., Matsuzaki, K., Miyachi, E. Journal of neural transmission (Vienna, Austria : 1996) (2005) [Pubmed]

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