MPEG1 and urinary bladder cancer: To this end, we injected NMIBC-RT112 bladder cancer cells into Tg(mpx:GFP) (Renshaw et al., 2006) and Tg(mpeg1:mCherry) (Renshaw et al., 2006; Ellett et al., 2011) zebrafish hosts, in which neutrophils and macrophages are fluorescently labeled, respectively (Fig. 2A).