IRIS – Institutional Research Information System
IRIS è il sistema di gestione della ricerca dell’Università degli Studi di Milano-Bicocca.Il repository BOA è il modulo del sistema dedicato alla raccolta e alla disseminazione della produzione scientifica di Ateneo. Le pubblicazioni sono ricercabili per parola chiave attraverso il box nella barra orizzontale in alto oppure, mediante il pulsante Sfoglia, per "Afferenza", "Autore", "Titolo", "Tipologia" o "Settore scientifico-disciplinare".
IRIS contiene inoltre alcuni moduli dedicati alla registrazione dei progetti e dei contratti, e alla reportistica avanzata per le attività di valutazione della ricerca
EnglishThe discharge properties of the medial vestibular nucleus neurones (MVNn) critically depend on the activity of several ion channel types. In this study we show, immunohistochemically, that the voltage-gated K<sup>+</sup> channels ERG1A, ERG1B, ERG2 and ERG3 are highly expressed within the vestibular nuclei of P10 and P60 mice. The role played by these channels in the spike-generating mechanisms of the MVNn and in temporal information processing was investigated electrophysiologically from mouse brain slices, in vitro, by analysing the spontaneous discharge and the response to square-, ramp- and sinusoid-like intracellular DC current injections in extracellular and whole-cell patch-clamp studies. We show that more than half of the recorded MVNn were responsive to ERG channel block (WAY-123,398, E4031), displaying an increase in spontaneous activity and discharge irregularity. The response to step and ramp current injection was also modified by ERG block showing a reduction of first spike latency, enhancement of discharge rate and reduction of the slow spike-frequency adaptation process. ERG channels influence the interspike slope without affecting the spike shape. Moreover, in response to sinusoid-like current, ERG channel block caused frequency-dependent gain enhancement and phase-lead shift. Taken together, the data demonstrate that ERG channels control the excitability of MVNn, their discharge regularity and probably their resonance properties. © 2008 The Author. Journal compilation © 2008 The Physiological Society.
Pessia, M., Servettini, I., Panichi, R., Guasti, S., Grassi, S., Arcangeli, A., et al. (2008). ERG voltage-gated K+ channels regulate excitability and discharge dynamics of the medial vestibular nucleus neurons. THE JOURNAL OF PHYSIOLOGY, 586, 4877-4890.
| Citazione: | Pessia, M., Servettini, I., Panichi, R., Guasti, S., Grassi, S., Arcangeli, A., et al. (2008). ERG voltage-gated K+ channels regulate excitability and discharge dynamics of the medial vestibular nucleus neurons. THE JOURNAL OF PHYSIOLOGY, 586, 4877-4890. |
| Tipo: | Articolo in rivista - Articolo scientifico |
| Carattere della pubblicazione: | Scientifica |
| Titolo: | ERG voltage-gated K+ channels regulate excitability and discharge dynamics of the medial vestibular nucleus neurons |
| Autori: | Pessia, M; Servettini, I; Panichi, R; Guasti, S; Grassi, S; Arcangeli, A; Wanke, E; Pettorossi, VE |
| Autori: | |
| Data di pubblicazione: | 2008 |
| Lingua: | English |
| Rivista: | THE JOURNAL OF PHYSIOLOGY |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1113/jphysiol.2008.155762 |
| Appare nelle tipologie: | 01 - Articolo su rivista |
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