Interleukins are a group of cytokines that play a critical role in immunological regulation and homeostasis. They are produced by leukocytes and other cells like macrophages. Interleukin-1 triggers inflammatory responses. Interleukin-6 regulates immune response and inflammation. Interleukin-10 is an anti-inflammatory cytokine that suppresses immune function. Interleukin-12 stimulates Th1 cellular immune responses by dendritic cells and phagocytes during infection. The Interleukin-17 family activates antibacterial responses through various pathways.