NETWORK ANALYSIS OF SINGLE-NUCLEOTIDE POLYMORPHISMS ASSOCIATED WITH ABERRANT INFLAMMATION IN TRAUMA PATIENTS SUGGESTS...

Area of Science:

• Genetics
• Immunology
• Critical Care Medicine

Background:

• Severe traumatic injury leads to critical illness, multi-organ dysfunction, and mortality, often driven by dysregulated inflammation.
• Genetic predisposition plays a role in inflammatory responses and outcomes in critical illness.
• A prior study linked LYPD4 single-nucleotide polymorphism (SNP) rs10404939 to inflammation and adverse outcomes in ~1,000 trauma patients.

Purpose of the Study:

• To explore mechanistic insights into LYPD4's role in critical illness.
• To investigate potential interactions among SNPs associated with inflammation in trauma patients.
• To compare SNP associations in patients with and without genotype-specific inflammatory responses.

Main Methods:

• Bioinformatic analysis of common SNPs associated with systemic inflammation trajectories in trauma patients versus controls.
• Analysis focused on interactions between rs10404939 and other inflammation-associated SNPs.
• Comparison of SNP profiles in control individuals and trauma patients with dysregulated inflammation.

Main Results:

• In controls, SNPs related to phosphatidylinositol and membrane transport proteins were implicated, but not LYPD4.
• In trauma patients with dysregulated inflammation, LYPD4 co-localized to lipid rafts with CD55, CNTNAP2, and RIMS4.
• Trauma patients genotyped for CD55 SNP rs11117564 showed distinct organ dysfunction and inflammation trajectories despite similar injury characteristics.

Conclusions:

• Novel SNP interactions in critical illness, particularly involving LYPD4 and CD55, are identified.
• These interactions may be crucial in understanding the inflammatory response to traumatic injury.
• Genotype-specific inflammatory responses, influenced by SNPs like rs11117564, impact clinical trajectories in critical illness.