Potentiation of Calcium Influx and Insulin Secretion in Pancreatic Beta Cell by the Specific TREK-1 Blocker Spadin.

Abstract:

:Inhibition of the potassium channels TREK-1 by spadin (SPA) is currently thought to be a promising therapeutic target for the treatment of depression. Since these channels are expressed in pancreatic β-cells, we investigated their role in the control of insulin secretion and glucose homeostasis. In this study, we confirmed the expression of TREK-1 channels in the insulin secreting MIN6-B1 β-cell line and in mouse islets. We found that their blockade by SPA potentiated insulin secretion induced by potassium chloride dependent membrane depolarization. Inhibition of TREK-1 by SPA induced a decrease of the resting membrane potential (ΔVm ~ 12 mV) and increased the cytosolic calcium concentration. In mice, administration of SPA enhanced the plasma insulin level stimulated by glucose, confirming its secretagogue effect observed in vitro. Taken together, this work identifies SPA as a novel potential pharmacological agent able to control insulin secretion and glucose homeostasis.

journal_name

J Diabetes Res

authors

Hivelin C,Béraud-Dufour S,Devader C,Abderrahmani A,Moreno S,Moha Ou Maati H,Djillani A,Heurteaux C,Borsotto M,Mazella J,Coppola T

doi

10.1155/2016/3142175

subject

Has Abstract

pub_date

2016-01-01 00:00:00

pages

3142175

eissn

2314-6745

issn

2314-6753

journal_volume

2016

pub_type

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