Prostaglandin E@ , platelet-derived growth factor ( PDGF ) AA , eotaxin , vascular endothelial growth factor , interferon - inducible protein of @ kDa , monocyte chemoattractant protein @ , growth-related oncogene , interleukin @ , interleukin @ ( IL-@ ) , and tumor necrosis factor were detectable in the aqueous and vitreous of at least half of the eyes , and these cytokines were analyzed further .