Pathogen adaptation to lung metabolites

Area of Science:

• Microbiology
• Immunology
• Metabolic pathways

Background:

• Opportunistic pathogens Pseudomonas aeruginosa and Staphylococcus aureus infect the respiratory tract.
• Host immune cells reprogram metabolism, releasing immunometabolites like succinate and itaconate.
• These bacteria adapt to the host's metabolic environment during infection.

Purpose of the Study:

• To review how P. aeruginosa and S. aureus utilize host metabolic pathways.
• To highlight pathogen metabolic plasticity as a survival strategy in the human lung.
• To understand bacterial adaptation to host-derived metabolites.

Main Methods:

• Literature review of studies on bacterial metabolism and host-pathogen interactions.
• Analysis of P. aeruginosa and S. aureus metabolic strategies.
• Examination of host immunometabolite roles in infection.

Main Results:

• P. aeruginosa consumes succinate for growth and forms biofilms in response to itaconate.
• Host ketone bodies support less immunostimulatory microbial communities.
• S. aureus forms biofilms due to itaconate and consumes proline, linking survival to fibroblast metabolism.

Conclusions:

• P. aeruginosa and S. aureus exhibit significant metabolic plasticity.
• Hijacking host metabolic pathways is crucial for pathogen survival and colonization.
• Understanding these adaptations is key to developing new therapeutic strategies.