Insights into the Relationship between Nucleolar Stress and the NF-κB Pathway

Area of Science:

• Cell Biology
• Molecular Biology
• Immunology

Background:

• The nucleolus and nuclear factor-κB (NF-κB) signaling are vital for cellular homeostasis.
• Dysregulation of these pathways is linked to common diseases and aging.
• Previously considered independent, emerging evidence highlights crosstalk between the nucleolus and NF-κB.

Purpose of the Study:

• To review the current understanding of the crosstalk between the nucleolus and NF-κB signaling.
• To elucidate the mechanisms of this interaction and its implications for health and disease.

Main Methods:

• Literature review of existing research on nucleolar stress and NF-κB activation.
• Analysis of studies investigating nucleolar sequestration of NF-κB/RelA and apoptosis induction.
• Examination of the roles of key proteins like TIF-IA, COMMD1, and nucleophosmin in this crosstalk.

Main Results:

• Nucleolar stress can activate the NF-κB pathway.
• The nucleolus can sequester NF-κB/RelA, leading to apoptosis.
• Proteins such as TIF-IA, COMMD1, and nucleophosmin are critical mediators of this nucleolus-NF-κB crosstalk.

Conclusions:

• The nucleolus and NF-κB signaling pathways are interconnected, influencing cellular homeostasis.
• This crosstalk has significant implications for disease pathogenesis and aging.
• Targeting this interaction, for example with aspirin, may offer therapeutic benefits, particularly in cancer treatment.