[Aumolertinib combined with anlotinib inhibits proliferation of non-small cell lung cancer cells by down-regulating the PI3K/AKT pathway].

Objective: To investigate the inhibitory effect of aumolertinib combined with anlotinib on proliferation of non-small cell lung cancer (NSCLC) cells.

Methods: CCK-8 assay, colony formation assay, and flow cytometry were used to assess the effect of different concentrations of aumolertinib or anlotinib on proliferation, survival, and apoptosis of PC-9 and HCC827 cells, and their synergistic effect was evaluated using the SynergyFinder model. In PC-9 and HCC827 cells treated with aumolertinib combined with anlotinib, the changes in cell invasion and migration abilities were assessed with Transwell assay, and the expressions of apoptosis- and invasion/migration-related proteins (Bax, Bcl-2, E-cadherin, vimentin, MMP2, and MMP9) and the key PI3K-Akt pathway proteins were detected using Western blotting.

Results: In PC-9 cells, the IC50 of aumolertinib and anlotinib was 1.701 μmol/L and 4.979 μmol/L, respectively, with a synergy score (ZIP) of 19.112; in HCC827 cells, their IC50 was 2.961 μmol/L and 7.934 μmol/L, respectively, with a ZIP of 12.325. Compared with aumolertinib and anlotinib used alone, their combined treatment more strongly inhibited the proliferation and survival, enhanced apoptosis and suppressed invasion and migration abilities of PC-9 and HCC827 cells. Western blotting showed that in both PC-9 and HCC827 cells, the combined treatment significantly upregulated the expressions of E-cadherin and Bax proteins, downregulated the expressions of Bcl-2, vimentin, MMP2, and MMP9 proteins, and reduced phosphorylation levels of PI3K and Akt.

Conclusion: Aumolertinib combined with anlotinib can effectively inhibit NSCLC cell proliferation by downregulating the PI3K-Akt pathway, suggesting a potentially new option for NSCLC treatment.