NF-κB and mucosal homeostasis

Area of Science:

• Immunology
• Gastroenterology
• Cell Biology

Background:

• Nuclear factor-kappa B (NF-κB) is a key regulator of inflammatory responses.
• Emerging evidence highlights NF-κB's crucial cytoprotective and homeostatic roles under normal physiological conditions.
• The mammalian intestine faces constant challenges from pathogens and commensal bacteria.

Purpose of the Study:

• To review the protective and homeostatic functions of NF-κB in the intestinal tract.
• To elucidate the role of NF-κB in host-microbe interactions within the gut.
• To differentiate NF-κB functions in intestinal epithelial cells versus immune cells.

Main Methods:

• Review of existing literature on NF-κB signaling in the intestine.
• Analysis of NF-κB's role in acute inflammatory and injurious challenges.
• Examination of NF-κB's involvement in chronic intestinal inflammation.

Main Results:

• NF-κB's antiapoptotic effects in intestinal epithelial cells are critical for tissue response to acute inflammation and injury.
• Proinflammatory and cell-survival functions of NF-κB in macrophages and T cells are central to chronic intestinal inflammation.
• NF-κB signaling significantly influences host-microbe interactions in the intestinal environment.

Conclusions:

• NF-κB exhibits distinct functions in different intestinal cell types, impacting both protection and inflammation.
• The balance of NF-κB activity is crucial for maintaining intestinal homeostasis and responding to microbial challenges.
• Targeting NF-κB pathways may offer therapeutic strategies for intestinal inflammatory diseases.