Host immune cells and immune mediators

Host immune cells and immune mediators represent the collective components of the immune system, including various leukocyte populations and the signaling molecules they produce (NIH, 2020). While these components are central to the pathophysiology of numerous diseases, the term itself does not refer to a single molecular target but rather a broad biological system (Nature Reviews Drug Discovery, 2017). In therapeutic contexts, specific molecules within this system, such as TNF-alpha or PD-1, are targeted to modulate immune activity (StatPearls, 2023). Dysregulation of these cells and mediators is a hallmark of autoimmune disorders, chronic inflammation, and cancer evasion (PubMed, 2021). Consequently, pharmacological intervention aims to either suppress overactive responses or stimulate dormant ones to restore homeostasis. Because of the systemic nature of these components, therapeutic modulation carries significant risks of off-target effects, including immunosuppression or hyper-inflammatory states like cytokine release syndrome (NIH, 2022).

Other names

Immune systemImmune componentsLeukocytes and inflammatory mediatorsHost immune response

Modulation of immune cell signaling, recruitment, and effector functions through the inhibition or activation of specific receptors and mediators.