Endoplasmic reticulum-targeted biomimetic nanoparticles induce apoptosis and ferroptosis by regulating endoplasmic reticulum function in colon cancer.

Colorectal cancer (CRC) is a major threat to human health, as it is one of the most common malignancies with a high incidence and mortality rate. The cancer cell membrane (CCM) has significant potential in targeted tumor drug delivery due to its membrane antigen-mediated homologous targeting ability. The endoplasmic reticulum (ER) in cancer cells plays a crucial role in apoptosis and ferroptosis. In this study, we developed an ER-targeted peptide-modified CCM-biomimetic nanoparticle-delivered lovastatin (LOV) nanomedicine delivery system (EMPP-LOV) for cancer treatment. Both in vitro and in vivo experiments demonstrated that EMPP could effectively target cancer cells and localize within the ER. EMPP-LOV modulated ER function to promote apoptosis and ferroptosis in tumor cells. Furthermore, synergistic antitumor efficacy was observed in both in vitro and in vivo models. EMPP-LOV induced apoptosis in CRC cells by over-activating endoplasmic reticulum stress and promoted ferroptosis by inhibiting the mevalonate pathway, leading to synergistic tumor growth inhibition with minimal toxicity to major organs. Overall, the EMPP-LOV delivery system, with its subcellular targeting capability within tumor cells, presents a promising therapeutic platform for CRC treatment.