Table 2.

Cytokine family classification.

Cytokine Family	Cytokines
Type I	Interleukin (IL)-2, IL-3, IL-4, IL-5, IL-6, IL-7, IL-9, IL-9, IL-12, granulocyte-colony stimulating factor(G-CSF), granulocyte macrophage-colony stimulating factor (GM-CSF)
Type II	IL-10, IL-19, IL-20, IL-22, interferon (IFN)-α, IFN-β, IFN-ε, IFN-κ, IFN-ω, IFN-δ, IFN-τ, IFN-γ
Tumor necrosis factor (TNF)	TNF-α, TNF-β, Fas ligand, CD40 ligand, TNF-related apoptosis- inducing ligand
IL-1	IL-1α, IL-1β, IL-18, IL-1Ra
Transforming growth factor (TGF)-β	Activins, inhibins, bone morphogenetic proteins, glial cell line- derived neurotrophic factor (GDNF)