Long-term memory is thought to be subserved by functional remodeling of neuronal circuits. Changes in the weights of existing synapses in networks might depend on voltage-gated potassium currents. We therefore studied the physiological role of potassium channels in memory, concentrating on the Shaker-like Kv1.1, a late rectifying potassium channel that is highly localized within dendrites of hippocampal CA3 pyramidal and dentate gyrus granular cells. Repeated intracerebroventricular injection of antisense oligodeoxyribonucleotide to Kv1.1 reduces expression of its particular intracellular mRNA target, decreases late rectifying K1 current(s) in dentate granule cells, and impairs memory but not other motor or sensory behaviors, in two different learning paradigms, mouse passive avoidance and rat spatial memory. The latter, hippocampal-dependent memory loss occurred in the absence of long-term potentiation changes recorded both from the dentate gyrus or CA1. The specificity of the reversible antisense targeting of mRNA in adult animal brains may avoid irreversible developmental and genetic background effects that accompany transgenic ‘‘knockouts’’.

Reversible antisense inhibition of Shaker-like Kv1.1 potassium channel expression impairs associative memory in mouse and rat / N. MEIRI; C. GHELARDINI; G. TESCO; N. GALEOTTI; D. DAHL; D. TOMSIC; S. CAVALLARO; A. QUATTRONE; S. CAPACCIOLI; A. BARTOLINI; D. ALKON. - In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. - ISSN 0027-8424. - STAMPA. - 94:(1997), pp. 4430-4434. [10.1073/pnas.94.9.4430]

Reversible antisense inhibition of Shaker-like Kv1.1 potassium channel expression impairs associative memory in mouse and rat

GHELARDINI, CARLA;GALEOTTI, NICOLETTA;QUATTRONE, ALESSANDRO;CAPACCIOLI, SERGIO;BARTOLINI, ALESSANDRO;
1997

Abstract

Long-term memory is thought to be subserved by functional remodeling of neuronal circuits. Changes in the weights of existing synapses in networks might depend on voltage-gated potassium currents. We therefore studied the physiological role of potassium channels in memory, concentrating on the Shaker-like Kv1.1, a late rectifying potassium channel that is highly localized within dendrites of hippocampal CA3 pyramidal and dentate gyrus granular cells. Repeated intracerebroventricular injection of antisense oligodeoxyribonucleotide to Kv1.1 reduces expression of its particular intracellular mRNA target, decreases late rectifying K1 current(s) in dentate granule cells, and impairs memory but not other motor or sensory behaviors, in two different learning paradigms, mouse passive avoidance and rat spatial memory. The latter, hippocampal-dependent memory loss occurred in the absence of long-term potentiation changes recorded both from the dentate gyrus or CA1. The specificity of the reversible antisense targeting of mRNA in adult animal brains may avoid irreversible developmental and genetic background effects that accompany transgenic ‘‘knockouts’’.
1997
94
4430
4434
N. MEIRI; C. GHELARDINI; G. TESCO; N. GALEOTTI; D. DAHL; D. TOMSIC; S. CAVALLARO; A. QUATTRONE; S. CAPACCIOLI; A. BARTOLINI; D. ALKON
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/312801
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