Intercellular Junctions
Intercellular Junctions - Related Videos
09:47
An Iodide-Yellow Fluorescent Protein-Gap Junction-Intercellular Communication Assay
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Cited by 3 •
2019
Here, we present a protocol for a novel gap junction intercellular communication assay designed for the high-throughput screening of gap junction-modulating chemicals for drug discovery and toxicological assessment.
10:50
Nanopodia - Thin, Fragile Membrane Projections with Roles in Cell Movement and Intercellular Interactions
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Cited by 15 •
2014
Nanopodia are thin but fragile membrane channels that extend up to 100 μm from a cell's leading front or trailing rear and sense the cellular environment. Direct fixation at 37 °C, gentle washing, and avoidance of organic solvents like ethanol, methanol, or acetone and of higher Triton X-100 concentrations are required to observe these cellular structures.
01:26
Intercellular Communication in a Contact-Free Co-Culture of Neurons and Oligodendrocytes
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2025
Begin with a contact-free co-culture of neurons and oligodendrocytes.A permeable membrane separates the neurons in the transwell insert from the oligodendrocytes at the bottom well.Add potassium to the insert to raise extracellular potassium levels, which inhibits the efflux of intracellular potassium.The potassium accumulation depolarizes the neurons, triggering the opening of voltage-gated calcium channels and allowing calcium influx.The influx stimulates the release of excitatory...
05:27
Gap Junctional Intercellular Communication: A Functional Biomarker to Assess Adverse Effects of Toxicants and Toxins, and Health Benefits of Natural Products
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Cited by 15 •
2016
This protocol describes a scalpel loading-fluorescent dye transfer technique that measures intercellular communication through gap junction channels. Gap junctional intercellular communication is a major cellular process by which tissue homeostasis is maintained and disruption of this cell signaling has adverse health effects.
01:11
P-N junction
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2024
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
FAQs
Transmembrane adhesion proteins act as molecular links between neighboring cell membranes or between a membrane and the cytoskeleton. Their organization determines whether a junction primarily restricts movement, reinforces tissue architecture, or supports communication. This division of labor allows cells within the same tissue to remain connected while preserving specialized transport and signaling functions.
Tight junctions mainly regulate movement through the space between adjacent cells, helping establish selective epithelial barriers. Adherens junctions and desmosomes instead emphasize mechanical support by connecting cells to structural elements. Together, these junctions coordinate permeability and tissue strength, so a tissue can control what crosses its cell layers without sacrificing physical stability.
Gap junctions form channels between neighboring cells, allowing ions and small molecules to pass directly from one cell to another. This arrangement supports intercellular communication without requiring substances to cross the surrounding extracellular space. In biology, their significance lies in linking the activities of nearby cells so that local cellular responses can become coordinated tissue behavior.
The cytoskeleton provides an internal structural framework that can be linked to adhesion proteins at the cell membrane. Through this connection, forces acting at one cell-cell contact can contribute to the organization and strength of the surrounding tissue. Cytoskeletal attachment therefore helps explain why some junctions are especially important for maintaining tissue architecture and mechanical support.
Researchers can examine which junction types are present and relate their locations to barrier function, mechanical support, or intercellular communication. Comparing these roles helps connect cellular structures with the way tissues are organized and maintained. This approach is relevant to epithelial biology, development, and investigations of how coordinated cell behavior contributes to normal tissue function.
Disrupted adhesion or cell signaling can interfere with the properties that junctions normally provide, including tissue strength, selective barriers, and coordinated activity. Studying these structures therefore gives researchers a framework for relating cellular defects to tissue-level problems. The same analysis can also clarify how normal epithelial organization and development depend on properly functioning cell contacts.