IL6 and metastatic prostate carcinoma: In our previous studies we evaluated cytotoxicity, apoptosis-inducing effects and interleukin 6 (IL-6) inhibition release in human primary and metastatic colon cancer (SW480, SW620), metastatic prostate cancer (PC3) and normal keratinocytes (HaCaT) cell lines after treatment with ciprofloxacin conjugates [24].