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Related Experiment Videos

Ketamine suppresses endotoxin-induced NF-kappaB expression.

T Sakai1, T Ichiyama, C W Whitten

  • 1Department of Anesthesiology and Pain Management, The University of Texas Southwestern Medical Center at Dallas, 75390-9068, USA.

Canadian Journal of Anaesthesia = Journal Canadien D'Anesthesie
|October 14, 2000
PubMed
Summary

Ketamine effectively inhibits endotoxin-induced nuclear factor-kappa B (NF-kappaB) activation in brain cells. This finding suggests ketamine may offer neuroprotection against inflammatory conditions.

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Area of Science:

  • Neuroscience
  • Immunology
  • Pharmacology

Background:

  • Proinflammatory cytokines, like TNF-alpha, contribute to neuroinflammation and neurodegenerative diseases.
  • Nuclear factor-kappa B (NF-kappaB) regulates the genes responsible for producing these inflammatory mediators.
  • NF-kappaB activation is implicated in brain injury and conditions such as multiple sclerosis.

Purpose of the Study:

  • To investigate whether ketamine inhibits lipopolysaccharide (LPS)-induced NF-kappaB activation.
  • To examine this effect in both human glioma cells in vitro and intact mouse brain cells in vivo.

Main Methods:

  • Electrophoretic mobility shift assays (EMSA) were used to determine NF-kappaB expression in nuclear extracts.
  • NF-kappaB expression was quantified by densitometry.

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  • Klenow fragment labeling identified NF-kappaB protein in both in vitro and in vivo experiments.

    • Main Results:

    • Endotoxin (LPS) significantly increased NF-kappaB expression in brain cells compared to controls.
    • Ketamine demonstrated a dose-dependent suppression of endotoxin-induced NF-kappaB activation.
    • This inhibitory effect was observed in both in vitro and in vivo models.

    Conclusions:

    • Ketamine effectively inhibits endotoxin-induced NF-kappaB expression in brain cells.
    • This mechanism may underlie the previously reported neuroprotective effects of ketamine.
    • Further research into ketamine's role in neuroinflammation is warranted.