ζ-Stat trisodium (NSC37044 trisodium) is a potent and selective inhibitor of protein kinase C-ζ (PKC-ζ), exhibiting an IC50 of 5 μM. It effectively suppresses the proliferation of melanoma cell lines and promotes apoptosis. Moreover, ζ-Stat trisodium demonstrates notable antitumor activity in vitro.
STAT3-IN-9, a potent inhibitor of STAT3 activation at Tyr705, exhibits no impact on the phosphorylation of STAT1 at Tyr 701. Additionally, this compound efficiently induces apoptosis and cell cycle arrest specifically at the G2/M phase [1].