Further studies on 5-hydroxytryptamine transport in pancreatic islets and isolated beta-cells

British Journal of Pharmacology
P Lindström

Abstract

1 The transport mechanism for (3)H-labelled 5-hydroxytryptamine (5-HT) in isolated pancreatic islets of non-inbred ob/ob mice was further characterized.2 Isolated beta-cells accumulated 5-HT to the same degree and with the same Na(+)-dependence as whole islets.3 Imipramine inhibited the uptake in a concentration-dependent way.4 Reserpine did not affect the uptake or efflux rates.5 Glucose stimulation of insulin secretion did not affect the uptake rate.6 It is concluded that the observed islet uptake of [(3)H]-5-HT represents an intracellular accumulation by the beta-cells. Mechanisms at the level of the plasma membrane may be rate-limiting for this process.

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Citations

Jul 8, 2011·The Cochrane Database of Systematic Reviews·Lilian Dudley, Paul Garner

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