The electrophysiology of the betacell based on single transmembrane protein characteristics

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dc.creatorMeyer-Hermann, Michael
dc.date2007-02-07
dc.date.accessioned2026-07-07T07:45:24Z
dc.date.available2026-07-07T07:45:24Z
dc.descriptionThe electrophysiology of betacells is at the origin of insulin secretion. Betacells exhibit a complex behaviour upon stimulation with glucose including repeated and uninterrupted bursting. Mathematical modelling is most suitable to improve knowledge about the function of various transmembrane currents provided the model is based on reliable data. This is the first attempt to build a mathematical model for the betacell-electrophysiology in a bottom-up approach which relies on single protein conductivity data. The results of previous whole-cell-based models are reconsidered. The full simulation including all prominent transmembrane proteins in betacells is used to provide a functional interpretation of their role in betacell-bursting and an updated vantage point of betacell-electrophysiology. As a result of a number of in silico knock-out- and block-experiments the novel model makes some unexpected predictions: Single-channel conductivity data imply that calcium-gated potassium currents are rather small. Thus, their role in burst interruption has to be revisited. An alternative role in high calcium level oscillations is proposed and an alternative burst interruption model is presented. It also turns out that sodium currents are more relevant than expected so far. Experiments are proposed to verify these predictions.
dc.description28 pages, 5 figures, 54 references, 14 pages supplementary material
dc.identifierhttps://arxiv.org/abs/q-bio/0702010
dc.identifierhttp://arxiv.org/abs/q-bio/0702010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/123518
dc.subjectCell Behavior
dc.subjectQuantitative Methods
dc.titleThe electrophysiology of the betacell based on single transmembrane protein characteristics
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