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Related Concept Videos

Feedback Regulation of Calcium Concentration01:27

Feedback Regulation of Calcium Concentration

Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
The Ca2+-CaM complex does not have enzymatic activity by itself. Instead, the complex binds downstream target proteins, including membrane proteins or enzymes,...
The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
Ligand-Gated Ion Channel Receptor: Gating Mechanism01:30

Ligand-Gated Ion Channel Receptor: Gating Mechanism

Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...

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Related Experiment Video

Updated: May 25, 2026

Fluorescent Calcium Imaging and Subsequent In Situ Hybridization for Neuronal Precursor Characterization in Xenopus laevis
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Fluorescent Calcium Imaging and Subsequent In Situ Hybridization for Neuronal Precursor Characterization in Xenopus laevis

Published on: February 18, 2020

Inverse problems in neuronal calcium signaling.

Jay Raol1, Steven J Cox

  • 1Department of Computational and Applied Mathematics, Rice University, Houston, TX, USA.

Journal of Mathematical Biology
|February 1, 2012
PubMed
Summary
This summary is machine-generated.

This study introduces quantitative calcium imaging in single neurons by developing algorithms to analyze fluorescent indicator data. These methods help understand calcium regulation and its impact on brain function.

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In Vivo Calcium Imaging of Neuronal Ensembles in Networks of Primary Sensory Neurons in Intact Dorsal Root Ganglia

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Last Updated: May 25, 2026

Fluorescent Calcium Imaging and Subsequent In Situ Hybridization for Neuronal Precursor Characterization in Xenopus laevis
09:07

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Published on: February 18, 2020

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Published on: March 17, 2023

In Vivo Calcium Imaging of Neuronal Ensembles in Networks of Primary Sensory Neurons in Intact Dorsal Root Ganglia
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Area of Science:

  • Neuroscience
  • Biophysics
  • Computational Biology

Background:

  • Calcium ions act as crucial second messengers in the brain.
  • Current methods provide a qualitative understanding of calcium dynamics.
  • Advanced imaging allows observation of calcium signals in complex neuronal structures.

Purpose of the Study:

  • To develop quantitative, single-cell calcium imaging techniques.
  • To infer parameters of cytosolic calcium buffers and membrane transport proteins.
  • To advance the understanding of neuronal calcium regulation.

Main Methods:

  • Analysis of four inverse problems to infer system parameters.
  • Utilizing fluorescent indicators and specific stimulus protocols.
  • Development and testing of practical algorithms on synthetic data.

Main Results:

  • Algorithms successfully infer parameters of calcium buffers and pumps/channels.
  • Demonstrated feasibility of quantitative calcium imaging in neurons.
  • Provided a framework for analyzing complex calcium signaling data.

Conclusions:

  • Quantitative calcium imaging is achievable with advanced analytical methods.
  • These algorithms enhance the understanding of neuronal calcium dynamics.
  • The study provides tools for future research in neurobiology and disease.