Related Experiment Video
Updated: May 8, 2026
08:34
Contribution of the Na+/K+ Pump to Rhythmic Bursting, Explored with Modeling and Dynamic Clamp Analyses
Published on: May 9, 2021
Endocytosis gets in tune with action potential bursts
Melissa A Herman1, Christian Rosenmund
1is at Neurocure NWFZ , Charité Universitätsmedizin Berlin , Berlin , Germany melissa.herman@charite.de.
Elife
|August 30, 2013
Summary
Neurons optimize synaptic vesicle recycling using a calcium-dependent process. This mechanism ensures efficient neurotransmission by regulating the rate of vesicle regeneration after release.
Area of Science:
- Neuroscience
- Cell Biology
Background:
- Synaptic transmission relies on the precise recycling of synaptic vesicles.
- Calcium ions play a crucial role in various cellular processes, including neurotransmitter release.
Purpose of the Study:
- To elucidate the calcium-dependent mechanism governing synaptic vesicle recycling.
- To understand how neurons optimize vesicle regeneration rates.
Main Methods:
- Utilized advanced imaging techniques to observe vesicle dynamics in real-time.
- Employed biochemical assays to analyze calcium signaling pathways.
Main Results:
- Identified a specific calcium-dependent pathway that directly regulates synaptic vesicle recycling.
- Demonstrated that modulating calcium levels alters the rate of vesicle regeneration.
Conclusions:
- Calcium-dependent mechanisms are essential for efficient synaptic vesicle turnover.
- This finding provides insights into the regulation of neuronal communication and plasticity.
Related Concept Videos
01:28Action Potential: Phases of Stimulation
The action potential is a complex electrical event that occurs in excitable cells, such as neurons and muscle cells. It consists of several distinct phases, each with specific characteristics.
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
Resting Phase:
In this phase, the cell's membrane is at its resting potential, typically around -70 millivolts (mV) for neurons. Inside the cell, there is a higher concentration of potassium ions (K+) and a lower concentration of sodium ions (Na+). Voltage-gated sodium channels are closed, and...
01:26Fusion of Secretory Vesicles with the Plasma Membrane
Proteins and neurotransmitters in secretory vesicles can be released from a cell upon vesicle docking, priming, and fusion with the plasma membrane. Vesicles are docked and primed in preparation for the quick exocytosis of their contents in response to a stimulus. The fusion process is mainly carried out by a SNAP Receptor or SNARE complex, consisting of synaptobrevin, syntaxin-1, and SNAP-25.
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
In 1993, Jim Rothman proposed that the antiparallel pairing of vesicular and transmembrane SNAREs, or...
01:14Action Potential
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
01:14Action Potential
Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...
01:41Action Potentials
Overview
01:27Feedback 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...
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...