Genome-Scale Meta-analysis of Host Responses to Staphylococcus aureus Identifies Pathways for Host-Directed...

Area of Science:

• Microbiology and Immunology
• Genomics and Bioinformatics

Background:

• Staphylococcus aureus infections present challenges due to metastatic spread, recurrence, and mortality.
• Antimicrobial resistance and intracellular bacterial persistence limit current treatment efficacy.
• Identifying effective host-directed therapies requires understanding complex pathogen-host interactions.

Purpose of the Study:

• To perform a meta-analysis of genome-scale studies to prioritize host responses to Staphylococcus aureus.
• To identify critical host responses for potential therapeutic targeting.

Main Methods:

• A meta-analysis by information content (MAIC) algorithm was used to integrate gene lists from genome-scale studies.
• Genes associated with host responses to S. aureus were systematically identified and ranked by cumulative evidence.

Main Results:

• The analysis prioritized 3867 host genes, highlighting myeloid cell immune responses (TLR2, IL-17, IFN-γ, IL-1β) and noncanonical pathways.
• Enriched pathways included autophagy, apoptosis, ferroptosis, iron metabolism, and proteasomal antimicrobial responses.
• Prioritized genes linked to platelet count, which was associated with clinical outcomes in S. aureus bacteremia patients.

Conclusions:

• This in silico analysis identified key cytokine hubs involved in S. aureus infection response.
• Apoptosis, autophagy, iron metabolism, and thrombosis are prioritized as novel therapeutic targets.
• Findings offer potential for developing host-directed therapies against S. aureus.