Immune and hematopoietic cells via secreted factors

The term 'Immune and hematopoietic cells via secreted factors' refers to a complex physiological system of cell-to-cell communication rather than a single, discrete molecular target. This system involves the production and release of soluble signaling molecules—such as cytokines, chemokines, and colony-stimulating factors—by various cell types to regulate the development and activity of the blood and immune systems. These secreted factors act in autocrine, paracrine, or endocrine fashions by binding to high-affinity receptors on the surface of target cells, initiating intracellular signaling cascades that govern cell survival, proliferation, and functional activation. In clinical practice, this 'target' is addressed by a wide array of biologics that either mimic these factors to stimulate cell production (e.g., G-CSF for neutropenia) or neutralize them to dampen pathological inflammation (e.g., TNF inhibitors for rheumatoid arthritis). Because this entry encompasses hundreds of distinct proteins and receptors across multiple cell lineages, it is classified as a biological pathway or mechanism of action rather than a specific therapeutic target.

Other names

Cytokine-mediated signalingHematopoietic niche communicationParacrine immune regulationSecreted factor signaling

Modulation of cellular behavior through the administration or inhibition of soluble ligands (cytokines, chemokines, growth factors) that bind to specific transmembrane receptors on immune and hematopoietic cells.