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Role of PTEN in neutrophil extracellular trap formation

Shahram Teimourian1, Ehsan Moghanloo2

  • 1Department of Medical Genetics, Iran University of Medical Sciences, Tehran, Iran; Department of Human Genetics, Tehran University of Medical Sciences, Tehran, Iran; Pediatrics Infectious Diseases Research Center, Department of Infectious Diseases, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.

Molecular Immunology
|April 28, 2015
PubMed

Insights

PTEN (phosphatase and tensin homolog) regulates neutrophil extracellular trap (NET) formation. Increasing PTEN enhances NETosis, while PTEN suppression reduces it, clarifying its role in this cell death process.

Area of Science:

  • Cell Biology
  • Immunology
  • Molecular Biology

Background:

  • Neutrophil extracellular traps (NETs) are involved in cell death, with ongoing debate regarding autophagy's role.
  • The Class I/AKT/mTOR pathway is crucial for regulating autophagy.
  • PTEN (phosphatase and tensin homolog) antagonizes the PI3K in the AKT/mTOR pathway and acts as a tumor suppressor.

Purpose of the Study:

  • To investigate the impact of PTEN down-regulation and overexpression on NETosis.
  • To elucidate the role of PTEN in regulating neutrophil extracellular trap formation.

Main Methods:

  • Utilized HL-60 differentiated neutrophil-like cells.
  • Manipulated PTEN expression levels through knockdown and overexpression.
  • Induced NETosis using PMA (phorbol 12-myristate 13-acetate).

Main Results:

  • PMA stimulation induced NETs in 35% of control HL-60 cells.
  • PTEN knockdown significantly reduced NET formation to 9%.
  • PTEN overexpression markedly increased NET formation to 56%.

Conclusions:

  • PTEN expression levels directly correlate with NETosis.
  • Increased PTEN promotes NET formation, whereas PTEN suppression inhibits it.
  • PTEN is a key regulator of NETosis in neutrophils.
Keywords:
AutophagyNETosisNeutrophil extracellular trapsPTEN

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