CXCL8 and cancer: VEGF is a key regulator of angiogenesis, and IL-8 is a regulation protein involved in tumorigenic activities in cancers, resveratrol can modulate activity of VEGF and IL-8 in SKOV-3 cell aggregates via significant attenuation of the expression of NF-κB, p-NF-κB, and proliferating cell nuclear antigen.372