916890-10-3

Biological Activity: Puquitinib (XC-302 free base) is a multi-target inhibitor with the activity of inducing autophagy in nasopharyngeal carcinoma cells by inhibiting the PI3K/AKT/mTOR signaling pathway. Puquitinib was able to inhibit the proliferation of CNE-2 cells, showing a dose-dependent antiproliferative effect. Puquitinib induced the formation of autophagosomes and autolysosomes in CNE-2 cells, which were observed by fluorescence microscopy and electron microscopy. Puquitinib promoted the formation of LC3-II and increased the expression of beclin 1, while reducing the level of p62. Puquitinib inhibited the PI3K/AKT/mTOR pathway by reducing the expression of p-AKT and p-mTOR. Puquitinib also induced apoptosis in CNE-2 cells, and when autophagy was inhibited, the apoptosis rate was reduced, which means that autophagy may interact with apoptosis to induce cell death^[1].