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Related Experiment Videos

Zinc activates NF-kappaB in HUT-78 cells.

A S Prasad1, B Bao, F W Beck

  • 1Department of Medicine, Division of Hematology-Oncology, Wayne State University School of Medicine, Detroit, Michigan, USA.

The Journal of Laboratory and Clinical Medicine
|September 28, 2001
PubMed
Summary
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Zinc deficiency impairs NF-kappaB activation and DNA binding in human immune cells. This study reveals zinc

Area of Science:

  • Immunology
  • Molecular Biology
  • Human Health

Background:

  • Zinc is vital for human health, with deficiency linked to immune dysfunction and cognitive issues.
  • Over 2000 transcription factors depend on zinc, but its role in their activation during deficiency is unclear.
  • Nuclear Factor kappa B (NF-kappaB) regulates Interleukin-2 (IL-2) and IL-2 receptor alpha genes.

Purpose of the Study:

  • To investigate the impact of zinc deficiency on NF-kappaB activation and DNA binding.
  • To determine if zinc influences NF-kappaB translocation and binding specificity.

Main Methods:

  • Utilized HUT-78 human lymphoblastoid cells to model zinc deficiency.
  • Assessed levels of phosphorylated IkappaB, IKK, and ubiquitinated IkappaB.
  • Measured NF-kappaB binding to DNA and its translocation from the cytosol to the nucleus.

Related Experiment Videos

  • Tested the zinc specificity of recombinant NF-kappaB binding to DNA.

    • Main Results:

    • Zinc deficiency significantly reduced phosphorylated IkappaB, IKK, and ubiquitinated IkappaB.
    • NF-kappaB binding to DNA was markedly decreased in zinc-deficient cells.
    • Zinc supplementation enhanced NF-kappaB translocation to the nucleus.
    • Recombinant NF-kappaB binding demonstrated zinc specificity.

    Conclusions:

    • Zinc is crucial for NF-kappaB activation in HUT-78 cells.
    • Cellular zinc levels directly influence the NF-kappaB signaling pathway.
    • Findings highlight zinc's role in immune gene regulation.