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Methods to Quantify the NF-κB Pathway During Senescence.

Lei Zhang1, Jing Zhao1,2, Aditi Gurkar1,3

  • 1Department of Molecular Medicine and Center on Aging, The Scripps Research Institute, Jupiter, FL, USA.

Methods in Molecular Biology (Clifton, N.J.)
|November 27, 2018
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Summary
This summary is machine-generated.

Nuclear factor κB (NF-κB) activity increases with age and drives cellular senescence. Inhibiting NF-κB may extend health span and reduce aging-related tissue dysfunction.

Keywords:
AgingNF-κBSASPSenescence

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Area of Science:

  • Molecular Biology
  • Immunology
  • Aging Research

Background:

  • Nuclear factor κB (NF-κB) is a transcription factor family regulating immunity, proliferation, apoptosis, and senescence.
  • NF-κB activity and its subunits RelA/p65 and p50 are implicated in the aging process.
  • NF-κB influences the senescence-associated secretory phenotype (SASP), impacting tissue homeostasis.

Purpose of the Study:

  • To review methods for measuring NF-κB activity in vivo during aging.
  • To discuss techniques for correlating NF-κB activation with senescence markers.

Main Methods:

  • Cellular localization of p65 subunit.
  • Electrophoretic mobility shift assay (EMSA) for NF-κB DNA binding.
  • RNA in situ hybridization.
  • Analysis of NF-κB target gene expression.
  • Immunostaining for senescence markers (e.g., γH2AX, p16INK4a, p21).

Main Results:

  • NF-κB activity elevates with age in various tissues.
  • Genetic deletion of p65 and p50 subunits differentially affects senescence.
  • Pharmacological NF-κB inhibition extends health span and reduces senescence in aging models.

Conclusions:

  • NF-κB plays a critical role in aging and senescence.
  • Multiple methods are essential for comprehensive assessment of NF-κB in aging research.
  • Understanding NF-κB's role in SASP is key to addressing age-related tissue dysfunction.