Cytokines and soluble immune mediators

Cytokines and soluble immune mediators are a broad and diverse group of small signaling proteins, including interleukins, interferons, chemokines, and tumor necrosis factors, that serve as the primary communicators of the immune system [1][3]. These mediators are secreted by a variety of cells, most notably macrophages and T-lymphocytes, and exert their effects by binding to specific high-affinity receptors on target cells [2]. Their biological functions are vast, encompassing the regulation of innate and adaptive immunity, inflammation, hematopoiesis, and wound healing [3]. In many pathological states, such as autoimmune diseases, chronic inflammatory conditions, and cytokine storms, the overproduction or dysregulation of these mediators leads to significant tissue damage and systemic illness [2][4]. Consequently, they are among the most successful therapeutic targets in modern medicine, with numerous biologic drugs developed to neutralize their activity or block their receptors to restore immune balance [4]. Monitoring these mediators and their downstream effects, such as through C-reactive protein levels, is essential for assessing disease activity and treatment efficacy [3].

Other names

ImmunomodulatorsSoluble mediatorsLymphokinesMonokinesChemokinesInterleukinsInterferons

Drugs targeting these mediators typically function through the neutralization of soluble ligands using monoclonal antibodies or decoy receptors, or by blocking the specific cell-surface receptors to which these mediators bind, thereby preventing the initiation of intracellular signaling pathways [4].