Systemic Inflammatory Responses in Surgical Patients
Summary
Surgical trauma elicits a complex systemic inflammatory response that is essential for tissue repair but which can become exaggerated, leading to complications such as postoperative infection, organ dysfunction and prolonged recovery. At the outset, damage-associated molecular patterns released from injured tissues activate innate immune pathways, triggering a surge in pro-inflammatory cytokines, complement factors and acute-phase proteins. Neutrophils rapidly degranulate and monocytes are recruited, while adaptive immunity often becomes transiently suppressed, creating a window of vulnerability to nosocomial pathogens. Biomarkers such as C-reactive protein, interleukin-6 and leukocyte counts guide early recognition of dysregulated inflammation, yet their predictive power remains imperfect. Enhanced understanding of transcriptional networks and cellular crosstalk has revealed that patient-specific factors—age, comorbidity and genetic predisposition—modulate the balance between protective and pathological inflammation. Ultimately, targeted modulation of key mediators promises to reduce the incidence of postoperative pneumonia, systemic inflammatory response syndrome (SIRS) and multiple organ dysfunction, thereby improving surgical outcomes across diverse specialties.
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Systemic Inflammatory Responses in Surgical Patients publication trend
The graph below shows the total number of articles in systemic inflammatory responses in surgical patients across all publications each year (not limited to Nature Index journals).
Technical terms
Systemic Inflammatory Response Syndrome (SIRS): A clinical syndrome defined by two or more of the following: abnormal temperature, heart rate, respiratory rate or white-cell count, indicative of widespread inflammation.
Cytokines: Small secreted proteins (for example interleukins, tumour necrosis factor) that mediate and regulate immunity and inflammation.
Transcriptomics: The study of the complete set of RNA transcripts produced by the genome under specific conditions, used to identify gene-expression changes.
Innate Immunity: The body’s first line of defence against injury or infection, involving non-specific mechanisms such as neutrophils, macrophages and complement.
Adaptive Immunity: Specific immune responses mediated by lymphocytes (T and B cells) that provide targeted and long-lasting protection.
Hub Genes: Highly connected genes within a gene-regulatory network that coordinate multiple biological pathways and act as key control points.
References
- Identification of potential hub genes linked to immune and metabolic alterations in postoperative systemic inflammatory dysregulation. Frontiers in Immunology (2023).
- A Transcriptomic Approach to Understand Patient Susceptibility to Pneumonia After Abdominal Surgery. Annals of Surgery (2023).
- Prolonged Systemic Inflammatory Response Syndrome After Cardiac Surgery. Journal of Cardiothoracic and Vascular Anesthesia (2023).
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