Regulation of hippocampal inhibitory circuits by nicotinic acetylcholine receptors

Journal of Physiology - Tập 590 Số 4 - Trang 655-666 - 2012
Marilena Griguoli1, Enrico Cherubini1
1Neuroscience Programme, International School for Advanced Studies (SISSA), via Bonomea 265, 34136 Trieste, Italy.

Tóm tắt

Abstract  The hippocampal network comprises a large variety of locally connected GABAergic interneurons exerting a powerful control on network excitability and which are responsible for the oscillatory behaviour crucial for information processing. GABAergic interneurons receive an important cholinergic innervation from the medial septum‐diagonal band complex of the basal forebrain and are endowed with a variety of muscarinic and nicotinic acetylcholine receptors (mAChRs and nAChRs) that regulate their activity. Deficits in the cholinergic system lead to the impairment of high cognitive functions, which are particularly relevant in neurodegenerative pathologies such as Alzheimer's and Parkinson's diseases as well as in schizophrenia. Here, we highlight some recent advances in the mechanisms by which cholinergic signalling via nAChRs regulates local inhibitory circuits in the hippocampus, early in postnatal life and in adulthood. We also discuss recent findings concerning the functional role of nAChRs in controlling short‐ and long‐term modifications of synaptic efficacy. Insights into these processes may provide new targets for the therapeutic control of pathological conditions associated with cholinergic dysfunctions.

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Journal of Physiology

Tập 590 Số 4

655-666

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