For example, exposure of prostate cancer cells to dexamethasone caused a glucocorticoid receptor (GR)-dependent down-regulation of pro-angiogenic factor (vascular endothelial growth factor, VEGF; interleukin-8, IL-8) generation and reduced the size and microvessel density of tumour xenografts [3]. The gene discussed is CXCL8; the disease is prostate carcinoma.