Functions of Cytokines | Immunology
On the basis of principal biologic actions; cytokines are grouped under three basic categories: (i) Mediators and regulators of innate immunity: These are produced mainly by mononuclear phagocytes in response to infectious agents: Pathogen-associated molecular patterns; like bacterial lipopolysaccharides (LPS) and viral double stranded RNA (dsRNA), also bind to Toll like receptors (TLRs) on the cell surface or in endosomes [...]