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The tight junction: a multifunctional complex.

Eveline E Schneeberger1, Robert D Lynch

  • 1Molecular Pathology Unit, Massachusetts General Hospital East, Charlestown, MA 02129, USA. eschneeberger@partners.org

American Journal of Physiology. Cell Physiology
|May 21, 2004
PubMed
Summary
This summary is machine-generated.

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Tight junctions are crucial for cell integrity, evolving from simple barriers to complex regulators of cell functions like gene transcription and polarity. This review covers recent advances in tight junction biology.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Physiology

Background:

  • Epithelial cells form essential barriers in multicellular organisms.
  • Intercellular junctions, including tight junctions, maintain barrier integrity and cell communication.
  • Tight junctions have transitioned from simple permeability barriers to complex regulators of cellular processes.

Purpose of the Study:

  • To provide an updated overview of recent developments in tight junction biology.
  • To highlight the evolving understanding of tight junction structure and function.

Main Methods:

  • Literature review of recent research on tight junctions.
  • Analysis of integral membrane proteins and plaque proteins involved in tight junctions.

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Main Results:

  • Tight junctions are multicomponent, multifunctional complexes.
  • Integral membrane proteins (occludin, claudins, JAMs) interact with plaque proteins.
  • Tight junctions regulate paracellular flux and integrate cell functions such as gene transcription, tumor suppression, cell proliferation, and polarity.

Conclusions:

  • The understanding of tight junctions has significantly advanced.
  • Tight junctions play a critical role in diverse cellular functions beyond barrier maintenance.
  • Further research into tight junction complexity is warranted.