This invention belongs to the field of medical technology, and specifically relates to the application of
serotonin 3
receptor antagonists in the preparation of antitumor drugs. This invention, through research, demonstrates for the first time that
serotonin 3
receptor antagonists can inhibit the activity of
tumor cells resistant to third-generation EGFR-TKIs. More importantly,
serotonin 3
receptor antagonists can not only reverse HER2 S310F
mutation-mediated resistance to third-generation EGFR-TKIs, but also reverse secondary resistance to third-generation EGFR-TKIs, thus enabling their use as antitumor drugs for patients resistant to third-generation EGFR-TKIs. The
combined use of serotonin 3 receptor antagonists and third-generation EGFR-TKIs exhibits a significant synergistic effect in inhibiting the proliferation of
lung adenocarcinoma cells, with minimal toxic side effects on
liver and kidney function, providing an
effective treatment strategy for clinically reversing third-generation EGFR-TKI resistance and improving the
treatment efficacy of NSCLC.