Complex sentence: Eosinophil recruitment into inflammatory tissue is a complex process, regulated by a number of inflammatory cytokines, and in EG cytokines IL-3, IL-5 and granulocyte macrophage colony stimulating factor (GM-CSF) may be behind the recruitement and activation.
Split into simpler sentences: Eosinophil recruitment into inflammatory tissue is a complex process, regulated by a number of inflammatory cytokines. In EG cytokines IL-3, IL-5 and granulocyte macrophage colony stimulating factor (GM-CSF) may be behind the recruitement and activation.