Necroptosis Activator

ZBP1/RIP3/MLKL activator 1 (compound 3a) is a synthetically derived quinoline compound. ZBP1/RIP3/MLKL Activator 1 induces DNA damage, enhances intracellular levels of reactive oxygen species (ROS), and triggers apoptosis via the caspase pathway. Furthermore, when apoptosis is inhibited, ZBP1/RIP3/MLKL Activator 1 promotes necroptotic cell death through the ZBP1-RIP3-MLKL pathway. ZBP1/RIP3/MLKL Activator 1 is utilized in oncological research, particularly in the selective targeting of cells with impaired apoptotic function.

Multi-kinase-IN-4 (compound 5d) is multi-targeted kinase inhibitor, including VEGFR2, EGFR, HER2, and CDK2, with IC₅₀ values of 0.33, 0.22, 0.18 and 2.09 μM, respectively. Multi-kinase-IN-4 shows broad-spectrum anti-cancer activities against HepG2, MCF-7, MDA-231, and HeLa cell lines (IC₅₀ = 1.94–7.1 µM), but exhibits lower toxicity in the WI-38 cells (IC₅₀ = 40.85 µM). Multi-kinase-IN-4 induces apoptosis and arrests cell cycle at S phase in HepG2 cells. Multi-kinase-IN-4 has the potential for the research of cancer.

FGFR1/VEGFR2-IN-2 (compound 6l) is a VEGFR2/FGFR1 dual inhibitor. The IC₅₀ values for VEGFR2 and FGFR1 are 0.025 µM and 0.026 µM respectively, and for EGFR and PDGFR-β, the IC₅₀ values are 0.106 µM and 0.077 µM. FGFR1/VEGFR2-IN-2 showes significant anti-cancer activity (GI=60.38%) on NCI-60 cell line, with an IC₅₀ of 8.51 µM in T-47D cell line and anti-migration. FGFR1/VEGFR2-IN-2 acts to arrest cells in the G1 phase and promote apoptosis and necrosis; the IC₅₀ for MCF-7 cell line exceeds 100 µM, and the IC₅₀ for MDA-MB-231 is 69.17 µM, non-toxic to normal cells.

HDAC8-IN-14, a curcuminoid derivative, is a selective HDAC8 inhibitor with a Ki of 9 nM. HDAC8-IN-14 induces the production of reactive oxygen species (ROS), disrupts mitochondrial membrane potential, and promotes apoptosis. HDAC8-IN-14 can significantly promote the accumulation of cells in the sub-G0/G1 phase, consistent with apoptotic or necrotic cell death. HDAC8-IN-14 induces upregulation of cytochrome c, cleaved caspase-3, and the pro-apoptotic protein Bak while leaving the anti-apoptotic Bcl-2 levels unaltered. HDAC8-IN-14 can be used for the study of leukemia.