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Antidiabetic Sulphonylureas Stimulate Acetylcholine Release from Striatal Cholinergic Interneurones Through Inhibition of K~ATP~ Channel Activity by Kevin Lee; Varuni Brownhill; Peter J. Richardson is a Neuroscience article available to read on EtoBox.

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Abstract: The sulphonylureas tolbutamide and glibenclamide were shown to stimulate acetylcholine release from rat striatal slices. To determine the mechanism of this effect, whole‐cell patch‐clamp recordings were made from large neurones within the striatum that displayed morphological, electrophysiological, and pharmacological characteristics typical of cholinergic interneurones. Dialysis of these neurones with a pipette solution containing low concentrations of ATP produced a gradual hyperpolarisation that could be reversed by bath application of the sulphonylureas. In voltage‐clamp studies, these compounds were shown to act through the inhibition of a potassium conductance. It is concluded that cholinergic interneurones within the rat striatum express sulphonylurea‐sensitive ATP‐sensitive potassium channel activity. These channels are probably cytoprotective and may prove to be novel sites of therapeutic modulation.

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Author

Kevin Lee; Varuni Brownhill; Peter J. Richardson

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0022-3042)

Published

1997

Language

EN

Field

Neuroscience (Life Sciences)