• Crit Care · Jun 2004

    Review

    Bench-to-bedside review: understanding genetic predisposition to sepsis.

    • Jesús Villar, Nicole Maca-Meyer, Lina Pérez-Méndez, and Carlos Flores.
    • Division Critical Care Research, Research Institute, Hospital Universitario NS de Candelaria, Tenerife, Canary Islands, Spain. jesus.villar@canarias.org
    • Crit Care. 2004 Jun 1; 8 (3): 180189180-9.

    AbstractSepsis is a complex syndrome that develops when the initial, appropriate host response to an infection becomes amplified, and is then dysregulated. Among other factors, the innate immune system is of central importance to the early containment of infection. Death from infection is strongly heritable in human populations. Hence, genetic variations that disrupt innate immune sensing of infectious organisms could explain the ability of the immune system to respond to infection, the diversity of the clinical presentation of sepsis, the response to current medical treatment, and the genetic predisposition to infection in each individual patient. Such genetic variations may identify patients at high risk for the development of sepsis and organ dysfunction during severe infections. Single base variations, known as single nucleotide polymorphisms (SNPs), are the most commonly used variants. There has been great interest in exploring SNP in those genes involved in the inflammatory cascade resulting from the systemic inflammatory response to micro organisms. The rationale for studying gene SNPs in critical illnesses seeks to identify potential markers of susceptibility, severity, and clinical outcome; seeks to identify potential markers for responders and non-responders in clinical trials, and seeks to identify targets for therapeutic intervention. In this review, we focus on the current state of association studies of those genes governing the powerful bacterial infection-induced inflammation and provide guidelines for future studies describing disease associations with genetic variations based on current recommendations. We envision a time in the near future when genotyping will be include in the standard evaluation of critically ill patients and will help to prioritize a therapeutic option.

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