Modeling the Electric Potential across Neuronal Membranes: The Effect of Fixed Charges on Spinal Ganglion Neurons and Neuroblastoma Cells
| Autor: | Roseli S. Wedemann, Célia Martins Cortez, Thiago M. Pinto |
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| Rok vydání: | 2014 |
| Předmět: |
Biophysical Simulations
Computer and Information Sciences Pathology medicine.medical_specialty Models Neurological Biophysics lcsh:Medicine Action Potentials Glycocalyx Membrane Potentials Neuroblastoma Electricity Electrostatics Ganglia Spinal medicine Humans lcsh:Science Theoretical Biology Computational Neuroscience Neurons Membrane potential Multidisciplinary Chemistry Applied Mathematics Physics lcsh:R Biology and Life Sciences Computational Biology medicine.disease Ganglion medicine.anatomical_structure Membrane Cytoplasm Physical Sciences lcsh:Q Electric potential Neuron Mathematics Research Article Neuroscience Computer Modeling |
| Zdroj: | PLoS ONE PLoS ONE, Vol 9, Iss 5, p e96194 (2014) |
| ISSN: | 1932-6203 |
| Popis: | We present a model for the electric potential profile across the membranes of neuronal cells. We considered the resting and action potential states, and analyzed the influence of fixed charges of the membrane on its electric potential, based on experimental values of membrane properties of the spinal ganglion neuron and the neuroblastoma cell. The spinal ganglion neuron represents a healthy neuron, and the neuroblastoma cell, which is tumorous, represents a pathological neuron. We numerically solved the non-linear Poisson-Boltzmann equation for the regions of the membrane model we have adopted, by considering the densities of charges dissolved in an electrolytic solution and fixed on both glycocalyx and cytoplasmic proteins. Our model predicts that there is a difference in the behavior of the electric potential profiles of the two types of cells, in response to changes in charge concentrations in the membrane. Our results also describe an insensitivity of the neuroblastoma cell membrane, as observed in some biological experiments. This electrical property may be responsible for the low pharmacological response of the neuroblastoma to certain chemotherapeutic treatments. |
| Databáze: | OpenAIRE |
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