NCIt definition : Chemokines constitute a superfamily of small (8-10 kDa), inducible, secreted, pro-inflammatory
cytokines that are involved in a variety of immune and inflammatory responses as well
as in viral infection. Chemokines act primarily as chemoattractants and activators
of specific types of leukocytes. Some members of this family were initially identified
on the basis of their biological activities (e.g., IL-8, GRO), others were discovered
using subtractive hybridization (e.g., RANTES) or signal sequence trap (e.g., PBSF/SDF-1)11
cloning strategies. They attract and activate leukocytes and regulate diverse cellular
systems and organs ranging from blood vessels to the central nervous system.;