CXCL1 and renal carcinoma: Another very recent analysis elucidates the link between increased angiogenesis in the breast, ovarian and renal cancers and the loss of miR-200a and b, whereby miR-200a/b collectively block the expression of interleukin-8 (IL-8) and CXCL1, a small cytokine previously called GRO1 [46].