Modulation of NF-κB in Tuberculosis - Understanding Host-Pathogen Interactions and Therapeutic Opportunities

Area of Science:

• Immunology
• Microbiology
• Molecular Biology

Background:

• Tuberculosis (TB), caused by Mycobacterium tuberculosis (M. tb), is a significant global health issue.
• Nuclear factor-kappa B (NF-κB) signaling is central to regulating inflammation and host defense during TB.
• M. tb virulence factors intricately interact with host NF-κB pathways.

Purpose of the Study:

• To review the molecular mechanisms by which M. tb manipulates NF-κB signaling.
• To highlight how M. tb exploits NF-κB for survival, persistence, and transmission.
• To explore therapeutic strategies targeting NF-κB modulation in TB.

Main Methods:

• Literature review of studies on M. tb virulence factors and NF-κB signaling.
• Analysis of molecular pathways involved in NF-κB activation and suppression by M. tb.
• Examination of host-pathogen interactions influencing immune responses.

Main Results:

• M. tb utilizes various components (e.g., MDP, TDM, ESAT-6/CFP-10) to modulate NF-κB.
• Early infection involves NF-κB activation for containment, while persistent infection sees immune reprogramming.
• M. tb employs mechanisms to suppress protective NF-κB responses and induce pathological hyperactivation, leading to tissue damage.
• Antigenic variation by PE/PPE proteins hinders adaptive immune memory.

Conclusions:

• M. tb actively remodels NF-κB signaling dynamics, involving coordinated activation, suppression, and hyperactivation.
• Understanding these regulatory mechanisms is crucial for developing host-directed therapies.
• Targeting NF-κB offers a promising strategy for managing both drug-sensitive and drug-resistant TB.