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Related Concept Videos

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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Contact-dependent Signaling01:19

Contact-dependent Signaling

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Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
Gap Junctions
In animal cells, gap junctions are formed...
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Tight Junctions01:29

Tight Junctions

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Tight junctions are molecular seals between cells that prevent the leaking of fluids, ions, and other small solutes across cavities and compartments in multicellular organisms. They are mainly composed of claudin and occludin transmembrane proteins, and other proteins such as tricellulin and JAM (junctional adhesion molecule). All these proteins are 4-pass transmembrane proteins, except JAM, which is a single-pass transmembrane protein belonging to the immunoglobulin superfamily. The...
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Plasmodesmata01:20

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In a multicellular organism, cells must communicate to work together in a coordinated manner. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.
Intercellular junctions are a feature of fungal, plant, and animal cells. However, different types of junctions are found in different kinds of cells. Intercellular junctions found in animal cells include tight junctions, gap junctions, and...
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Aquaporins01:25

Aquaporins

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Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
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Mechanisms of Membrane Domain Formation00:59

Mechanisms of Membrane Domain Formation

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Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with...
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Single-cell Microinjection for Cell Communication Analysis
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Supramolecular Channels Assembled within Intercellular Gaps.

Qi Xiao1, Daoming Guan1, Yong-Hong Fu1

  • 1Department of Chemistry, Fudan University, 220 Handan Road, 200433 Shanghai, China.

Journal of the American Chemical Society
|August 8, 2024
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Summary
This summary is machine-generated.

Researchers created artificial tubular channels in cells to mimic natural gap junctions. These supramolecular channels inhibit tumor cell invasion by blocking cell migration, offering a novel chemotherapy strategy.

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Nanotechnology

Background:

  • Tubular structures are vital in biological systems, mediating cellular communication.
  • Artificial analogues offer potential for novel therapeutic strategies, such as in chemotherapy.
  • Natural gap junctions provide a blueprint for constructing functional intercellular channels.

Purpose of the Study:

  • To construct artificial supramolecular channels within intercellular gaps.
  • To mimic the assembly and structure of natural gap junctional channels.
  • To investigate the potential of these artificial channels in inhibiting tumor cell invasion.

Main Methods:

  • Supramolecular channel assembly driven by electrostatic interactions.
  • Mimicking the structure of natural gap junctions with hydrophobic and hydrophilic modules.
  • Utilizing intercellular gaps for channel construction.

Main Results:

  • Successfully constructed supramolecular channels within intercellular gaps.
  • The channels mimic the structural components of natural gap junctions.
  • Demonstrated inhibition of tumor cell invasion by preventing cell migration.

Conclusions:

  • Artificial supramolecular channels can be assembled in living cells.
  • These channels effectively inhibit tumor cell invasion and migration.
  • This approach represents a promising new strategy for cancer chemotherapy.