PLD-IN-1

PLD-IN-1 (Compound 3r) is an orally active inhibitor for phospholipase D with an IC50 of 1.97 μM. PLD-IN-1 reduces the expression of CD24, CD47 and PD-L1, enhances the calreticulin expression, and thus modulates the immune evasion mechanism in lung cancer cells by promoting the phagocytosis of cancer cells by macrophages. PLD-IN-1 inhibits the cell viability of lung cancer cell A549, HCC44, H460 and HCC15 with IC50 of 18.44, 22.31, 24.85 and 21.45 μM, respectively. PLD-IN-1 can induce apoptosis and inhibits migration in cell A549. PLD-IN-1 enhances the level of pro-inflammatory M1 macrophages and decreases the level of anti-inflammatory M2 macrophages, exhibits antitumor efficacy in mouse model[1].