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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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Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
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Cell Migration01:19

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Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
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Overview of Cell-Matrix Interactions01:24

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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
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Multi-parametric analysis of 57 SYNGAP1 variants reveal impacts on GTPase signaling, localization, and protein stability.

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Related Experiment Video

Updated: Apr 13, 2026

Co-culture of Glioblastoma Stem-like Cells on Patterned Neurons to Study Migration and Cellular Interactions
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Reduction in gap junction intercellular communication promotes glioma migration.

Qurratulain Aftab1, Wun-Chey Sin1, Christian C Naus1

  • 1Department of Cellular & Physiological Sciences, Life Sciences Institute, The University of British Columbia, Vancouver, BC.

Oncotarget
|May 1, 2015
PubMed
Summary
This summary is machine-generated.

Reduced Connexin43 (Cx43) expression in glioblastoma enhances cell migration by weakening cell-ECM adhesion and promoting single-cell movement, revealing a new role for gap junction intercellular communication (GJIC) in collective migration.

Keywords:
connexingap junctiongliomamigration

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Area of Science:

  • Neuro-oncology
  • Cell Biology
  • Biochemistry

Background:

  • Glioblastoma Multiforme (GBM) is an aggressive brain tumor characterized by invasive growth.
  • Decreased expression of Connexin43 (Cx43), a gap junction protein, is observed in GBM, but its contribution to malignancy is unclear.

Purpose of the Study:

  • To investigate the role of reduced Cx43 protein expression in enhanced glioblastoma cell migration.
  • To determine if Cx43 down-regulation contributes to glioma malignancy through altered cell migration patterns.

Main Methods:

  • Utilized a 3D spheroid migration model to simulate in vivo tumor architecture.
  • Quantified migration changes in U118 human glioma cells with down-regulated Cx43 expression.
  • Assessed the role of gap junction intercellular communication (GJIC) and Cx43 C-terminal tail interactions in migration.

Main Results:

  • Down-regulation of Cx43 increased glioma cell migration by reducing cell-extracellular matrix (ECM) adhesion.
  • Migration patterns shifted from collective to single-cell migration upon Cx43 reduction.
  • GJIC was found to be more critical in mediating migration than Cx43 C-terminal tail interactions.
  • Reduced Cx43 expression enhanced cell speed and altered migration direction.

Conclusions:

  • Reduced Cx43 expression promotes glioblastoma cell migration and invasiveness.
  • GJIC plays a significant role in facilitating collective cell migration in gliomas.
  • Cx43 down-regulation contributes to glioma malignancy through altered migratory behaviors.