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Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands
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An anti-inflammatory component derived from milk of hyperimmunised cows reduces tight junction permeability in vitro

K Stelwagen1, D J Ormrod

  • 1Dairy Sciences, AgResearch, Ruakura Agricultural Centre, Hamilton, New Zealand. stelwagenk@agresearch.cri.nz

Inflammation Research : Official Journal of the European Histamine Research Society ... [Et Al.]
|November 27, 1998
PubMed

Insights

Hyperimmune milk factor (HIMF) enhances tight junction integrity in epithelial cells and inhibits cell growth. This suggests HIMF may play a role in reducing inflammation by limiting white blood cell migration.

Area of Science:

  • Cell biology
  • Immunology
  • Biochemistry

Background:

  • Epithelial tight junctions maintain tissue integrity and regulate paracellular transport.
  • Inflammation can disrupt tight junction function, leading to increased permeability.
  • Hyperimmune milk factor (HIMF) is an anti-inflammatory agent derived from milk.

Purpose of the Study:

  • To investigate the effects of HIMF on tight junction permeability and cell growth in vitro.
  • To determine if HIMF can prevent or reverse inflammation-induced tight junction disruption.

Main Methods:

  • Utilized mammary (HC11) and kidney (MDCK) epithelial cell lines.
  • Assessed tight junction integrity by measuring transepithelial electrical resistance (TER).
  • Evaluated cell growth via total DNA quantification.

Main Results:

  • HIMF promoted tight junction formation and prevented TER loss during inflammatory challenges.
  • HIMF accelerated the recovery of TER after inflammatory challenge.
  • HIMF demonstrated an inhibitory effect on cell growth.

Conclusions:

  • HIMF actively supports the maintenance and formation of epithelial tight junctions.
  • The anti-inflammatory effects of HIMF may be attributed to its ability to restrict white blood cell extravasation through tight junctions.
Abstract

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