Ion Flux
Ion Flux - Related Videos
09:18
Measurement of Extracellular Ion Fluxes Using the Ion-selective Self-referencing Microelectrode Technique
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Cited by 6 •
2015
Transporters in cell membranes allow differential segregation of ions across cell membranes or cell layers and play crucial roles during tissue physiology, repair and pathology. We describe the ion-selective self-referencing microelectrode that allows the measurement of specific ion fluxes at single cells and tissues in vivo.
13:30
Use of the Ramsay Assay to Measure Fluid Secretion and Ion Flux Rates in the Drosophila melanogaster Malpighian Tubule
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Cited by 23 •
2015
This protocol describes the use of the Ramsay assay to measure fluid secretion rates from isolated Malpighian (renal) tubules from Drosophila melanogaster. In addition, the use of ion-specific electrodes to measure sodium and potassium concentrations in the secreted fluid, allowing calculation of transepithelial ion flux, is described.
03:54
Monitoring B Cell Activation with Antigenic Liposomes using a Calcium-Flux Assay
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2025
This video showcases the assessment of B cell activation through the utilization of antigenic liposomes. B cells treated with calcium-sensitive Indo-1 dye are distinguished using flow cytometry, and their violet-to-blue fluorescence ratio is analyzed. As the cells encounter antigenic liposomes, it triggers B cell activation through calcium influx, progressively enhancing the violet-to-blue fluorescence signal ratio over time.
09:05
Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites
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2019
The presented protocol uses the eddy covariance method at non-typical locations, applicable to all types of short-canopy ecosystems with limited area, on a currently reforested windthrow site in Poland. Details of measuring site setup rules, flux calculations and quality control, and final result analysis, are described.
03:24
Common Ion Effect
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2020
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide: This solubility equilibrium may be shifted left by the addition of either silver(I) or iodide ions, resulting in...
FAQs
The direction of ion movement reflects the combined influence of electrical potential and chemical imbalance across a membrane. Ion channels, pumps, and transporters respond to these electrochemical gradients or to regulatory signals, changing which ions enter or leave a cell or organelle. Those shifts can alter membrane conditions and intracellular balance, enabling downstream communication, transport, and homeostatic responses.
These membrane components regulate ion movement through complementary mechanisms. Channels provide regulated routes for ions, while pumps and transporters control movement in response to cellular requirements and gradients. Their activity determines whether ions such as calcium, potassium, sodium, or chloride accumulate within or exit a compartment. Consequently, changes in component activity can reshape electrical potential and chemical balance.
In immune cells, ion flux connects membrane dynamics with signaling outcomes. Changes in ion distribution can contribute to leukocyte activation, migration, cytokine secretion, and antimicrobial responses, while measurements can help relate these shifts to inflammasome activity. This connection allows investigators to examine how altered ion homeostasis participates in immune signaling rather than treating membrane changes as isolated events.
Pathogens may disrupt host ion homeostasis in ways that support replication or reduce the effectiveness of host defense. Such changes can modify membrane conditions and interfere with immune signaling, including processes associated with antimicrobial responses. Studying these alterations helps distinguish pathogen-driven effects on host cells from normal regulatory shifts and clarifies how ion balance contributes to host-pathogen interactions.
Measurements of ion flux provide a way to connect membrane-level changes with cellular and infectious outcomes. Researchers can use the resulting information to examine immune signaling, inflammasome activity, leukocyte behavior, cytokine secretion, and antimicrobial responses. Comparing ion shifts with these outcomes helps clarify whether altered ion homeostasis accompanies or contributes to observed host responses during infection.
Ion flux analysis is useful when a study needs to connect changes in cellular ion balance with disease-related immune or infectious processes. It can support investigations of leukocyte activation, pathogen effects on host cells, inflammasome activity, and antimicrobial defense. These relationships may also identify ion-regulating processes as potential therapeutic targets for further study.