Cytokines are classified based on their function and the type of cell that secretes them. Some major categories include:
- Interleukins (IL): Primarily produced by leukocytes and involved in communication between immune cells. - Interferons (IFN): Play a role in antiviral responses and modulation of the immune system. - Tumor Necrosis Factors (TNF): Involved in inflammation and apoptosis. - Chemokines: Direct the migration of cells, especially immune cells, to sites of infection or injury. - Growth Factors: Such as Transforming Growth Factor (TGF) and Platelet-Derived Growth Factor (PDGF), which are important in cell proliferation and tissue repair.
