Systemic immune and inflammatory network

The systemic immune and inflammatory network is a multi-scale biological system comprising diverse immune cell populations, signaling proteins such as cytokines and chemokines, and their corresponding receptors that maintain organismal homeostasis (Nathan, C., 2002, Nature). Rather than a single molecular entity or a discrete therapeutic target, it functions as a coordinated circuit that integrates local and systemic signals to mount responses against pathogens, injury, or internal stressors (Tracey, K. J., 2002, Nature). In pathological states, such as sepsis, COVID-19, or chronic autoimmune disorders, this network becomes dysregulated, leading to hyperinflammation or persistent low-grade inflammatory signaling that causes tissue damage and organ dysfunction. Therapeutic intervention typically involves targeting specific nodes within the network—such as TNF-alpha, IL-6, or the JAK/STAT pathway—to dampen pathological activity without completely compromising host defense. Consequently, while the network itself is too broad to be a single drug target, it serves as the essential framework for immunomodulatory drug development and the application of systemic biomarkers like the Systemic Immune-Inflammation Index (SII) for patient stratification (Hu, B. et al., 2014, International Journal of Cancer).

Other names

Systemic immune-inflammatory systemImmune-inflammatory networkCytokine-chemokine networkSystemic inflammatory response system

Modulation of cytokine signaling, inhibition of immune cell activation, and suppression of inflammatory mediator production to restore systemic homeostasis (Medzhitov, R., 2008, Nature).