Producing Trojans: hijacking of monocyte differentiation by pathogens.

Area of Science:

• Immunology
• Microbiology
• Cellular Biology

Background:

• Pathogens exploit host immune cell plasticity, particularly monocyte differentiation.
• Monocytes differentiate into macrophages and dendritic cells, crucial for immune responses.
• Understanding pathogen manipulation of these cells is key to controlling infections.

Purpose of the Study:

• To review how microbial pathogens hijack monocyte differentiation.
• To explore mechanisms by which pathogens reprogram macrophages.
• To highlight emerging strategies pathogens use for survival and transmission.

Main Methods:

• Literature review of studies on pathogen-host interactions.
• Analysis of molecular mechanisms employed by viruses, bacteria, and fungi.
• Focus on reprogramming of monocyte fate and macrophage function.

Main Results:

• Viruses (e.g., HIV, CMV) modulate host cell networks, signaling, and autophagy.
• Bacteria (e.g., M. tuberculosis, Salmonella) disrupt monocyte differentiation for replication.
• Fungi subvert immune responses via cytokine modulation and phenotypic changes.

Conclusions:

• Pathogens actively reprogram monocytes and macrophages to establish and maintain infections.
• Diverse microbial agents utilize distinct molecular strategies to manipulate host immunity.
• Emerging mechanisms of monocyte reprogramming are critical for pathogen survival and transmission.