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Related Concept Videos

Gap Junctions01:27

Gap Junctions

9.5K
The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
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Gap Junctions01:37

Gap Junctions

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Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
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P-N junction01:11

P-N junction

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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...
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The Neuromuscular Junction01:19

The Neuromuscular Junction

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The nervous system consists of complex motor neuron circuits, including upper motor neurons originating from the cerebral cortex and lower motor neurons starting in the spinal cord, coordinating both voluntary and involuntary movements. Among these, somatic motor neurons activate skeletal muscles and are classified into alpha, beta, and gamma types. Alpha neurons are vital for voluntary movement coordination, while gamma neurons adjust muscle spindle sensitivity, and the function of beta...
18.9K
Anchoring Junctions01:03

Anchoring Junctions

5.0K
Anchoring junctions are multiprotein complexes that help cells connect to other cells and the extracellular matrix. Anchoring junctions are present on the lateral and basal surfaces of cells, providing strong and flexible connections. Focal adhesions are often formed due to cell interactions with the ECM substrata, which initiate signal transduction via kinase cascades and other mechanisms. Together, they provide stability and tissue integrity. There are three types of anchoring junctions:...
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Adherens Junctions01:24

Adherens Junctions

6.4K
Strong contact points between adjacent cells anchor them to each other, forming tissues. Such anchoring junctions are of two types –  adherens junctions and desmosomes. Adherens junctions are abundant in tissues such as  epithelium and endothelium, forming a continuous zone of adhesion called the adhesion belt. In other tissues, such as  heart muscle, they appear as clusters, linking the cells to produce coordinated heart muscle contraction.
Adherens Junctions are Dynamic
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Related Experiment Video

Updated: Jan 30, 2026

A Functional Assay for Gap Junctional Examination; Electroporation of Adherent Cells on Indium-Tin Oxide
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PARIS, an optogenetic method for functionally mapping gap junctions.

Ling Wu1,2,3, Ao Dong1,2,3, Liting Dong3

  • 1State Key Laboratory of Membrane Biology, Peking University School of Life Sciences, Beijing, China.

Elife
|January 15, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed PARIS, a novel tool to optically measure cell-specific gap junctional coupling (GJC). This technology allows for precise in vivo monitoring of intercellular communication, advancing our understanding of physiological processes and diseases.

Keywords:
D. melanogastercardiomyocyteselectrical synapsesgap junctionsneuroscienceolfactory systemoptogenetics

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Area of Science:

  • Cellular Biology
  • Neuroscience
  • Biotechnology

Background:

  • Gap junctions mediate direct cell-cell communication, crucial for physiological functions.
  • Understanding in vivo gap junction distribution and function is limited by the lack of specific, high-resolution tools.

Purpose of the Study:

  • To develop a novel, genetically encoded tool for measuring cell-specific gap junctional coupling (GJC) in vivo.
  • To overcome limitations of existing methods for studying gap junctions with high spatiotemporal resolution.

Main Methods:

  • Development of PARIS (pairing actuators and receivers to optically isolate gap junctions), a fully genetically encoded optical tool.
  • Application of PARIS in cultured cell lines and genetically defined neurons in Drosophila.

Main Results:

  • PARIS successfully measured cell-specific GJC in cultured cells and Drosophila neurons.
  • The tool provides ~10-second temporal and sub-cellular spatial resolution.
  • Demonstrated robustness and high sensitivity for mapping functional gap junctions.

Conclusions:

  • PARIS is a powerful new tool for studying gap junction function and regulation.
  • Enables detailed mapping of functional gap junctions in vivo.
  • Facilitates research into the role of GJC in health and disease.