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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Helmchen, Fritjof Tank, David W. |
| Abstract | This introduction describes a single-compartment model of calcium dynamics that has been applied to fluorescence measurements of intracellular free calcium concentration $([Ca^{2+}]_{i})$ changes in neurons. The model describes intracellular calcium handling under simplified conditions, for which analytical expressions for the amplitude and the time constants of $[Ca^{2+}]_{i}$ changes can be explicitly derived. In particular, it reveals the dependence of the measured $[Ca^{2+}]_{i}$ changes on the calcium indicator concentration. Applied to experimental data from small cells or subcellular compartments, the model equations have been extremely useful for obtaining quantitative information about essential parameters of $Ca^{2+}$ influx, buffering, and clearance. We illustrate also several changes that occur when the basic assumptions do not hold (e.g., when calcium diffusion, dye saturation, or kinetic effects become significant). Finally, we discuss how the changes in calcium dynamics, which are explained by the model, have been exploited for measuring properties of calcium-driven reactions, such as those regulating short-term synaptic enhancement, vesicle recycling, and adaptation. |
| File Format | HTM / HTML |
| ISSN | 19403402 |
| Issue Number | 2 |
| Journal | Cold Spring Harbor Protocols |
| Volume Number | 2015 |
| e-ISSN | 15596095 |
| Language | English |
| Publisher | Cold Spring Harbor Laboratory Press |
| Publisher Date | 2015-02-02 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Clinical Laboratory Techniques Calcium Metabolism Dendrites Models, Biological Nerve Endings Animals Humans Subcellular Fractions Journal Article |
| Content Type | Text |
| Resource Type | Article |
| Subject | Biochemistry, Genetics and Molecular Biology |
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