quiescent cancer cells

SDZ-62-434, a platelet-activating factor inhibitor with antitumor activity, inhibits bombesin- and platelet-derived growth factor-induced DNA synthesis in quiescent Swiss 3T3 cells, making it a potential candidate for studying leukemia, human xenograft colorectal cancer, and lung cancer.

F5446 is a SUV39H1 inhibitor. F5446 has an EC50 of 0.496 μmol/L for SUV39H1 enzymatic activity. H3K9me3 was enriched in the promoters of GZMB, PRF1, FASLG, and IFNG in quiescent T cells. F5446 inhibited H3K9me3, thereby upregulating expression of these effectors in tumor-infiltrating CTLs and suppressing colon carcinoma growth in a CD8+ CTL-dependent manner in vivo. Our data indicate that SUV39H1 represses CTL effector gene expression and, in doing so, confers colon cancer immune escape.

1. Agrimol B is a main active ingredient isolated from Agrimonia pilosa Ledeb.