Abstract
The dissemination of circulating tumor cells in the peripheral blood circulation system plays a fundamental role in cancer recurrence and metastasis. Therefore, it is a pivotal scientific requirement to eradicate circulating tumor cells in whole blood system effectively. In this work, we provide a pH and GSH responsive drug delivery and release composites using cancer cell membrane biomimetic nanoparticles loaded with Pt(IV) prodrug (CM-Pt(IV) NPs), which exhibits high selectivity and biocompatibility. Cancer cells tend to form homogeneous aggregates by interacting with tumor-specific binding proteins on their surface. Thus, the cancer cell membrane coating possesses a homologous targeting ability to circulating tumor cells. The core nano-carrier composites loaded with Platinum(IV) agents were prepared by combining PLGA, Hyaluronic acid, and Cystamine. Within the nano-carrier composites, the S–S bond was reduced to S–H due to the high concentration of GSH present in cancer cells under an environment with a pH of 6.8. Consequently, this facilitates the release of platinum drugs that can specifically bind to cell DNA and effectively eradicate cancer cells. This highly selective delivery and precise release composites enable CM-Pt(IV) NPs to eliminate circulating tumor cells in the peripheral blood system effectively. This study provides an efficient drug delivery strategy for treating metastatic cancer.
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