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• W3129776093 abstract "We investigate calcium signaling feedback through calcium-activated potassium channels of a dendritic spine by applying the immersed boundary method with electrodiffusion. We simulate the stochastic gating of such ion channels and the resulting spatial distribution of concentration, current, and membrane voltage within the dendritic spine. In this simulation, the permeability to ionic flow across the membrane is regulated by the amplitude of chemical potential barriers. With spatially localized ion channels, chemical potential barriers are locally and stochastically regulated. This regulation represents the ion channel gating with multiple subunits, the open and closed states governed by a continuous-time Markov process. The model simulation recapitulates an inhibitory action on voltage-sensitive calcium channels by the calcium-activated potassium channels in a stochastic manner as a non-local feedback loop. The model predicts amplified calcium influx with more closely placed channel complexes, proposing a potential mechanism of differential calcium handling by channel distributions. This work provides a foundation for future computer simulation studies of dendritic spine motility and structural plasticity." @default.
• W3129776093 created "2021-03-01" @default.
• W3129776093 creator A5003134797 @default.
• W3129776093 date "2021-02-17" @default.
• W3129776093 modified "2023-10-18" @default.
• W3129776093 title "Electrodiffusion with Calcium-Activated Potassium Channels in Dendritic Spine" @default.
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• W3129776093 doi "https://doi.org/10.1007/s11538-020-00854-4" @default.
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