Construction of Intelligent Nano-Drug Delivery System for Targeting Extranodal Nasal Natural Killer/Thymus Dependent Lymphocyte.

Extranodal nasal NK/T-cell lymphoma is highly aggressive and malignant. Owing to the lack of multi-center prospective controlled studies, there is not a unified standard for the current clinical best treatment model. In recent years, new nano-drug delivery systems have made great progress in the field of tumor treatment. However, research on ENKTL is still in its infancy. The authors' previous research has proven that the dextran nano-drug delivery system can optimize and improve the in vivo pharmacokinetic behavior and anti-tumor effects of doxorubicin through interaction with the reticuloendothelial system and the complex tumor microenvironment. At the same time, gemcitabine, which is commonly used in the clinical treatment of ENKTL, and cisplatin, which is a radiosensitizer, both contain free amino groups, which can be successfully grafted to aldehyde-based natural polysaccharides. Therefore, based on the natural nano-drug carrier, we constructed a smart long-circulation drug delivery system that co-loaded gemcitabine and cisplatin and targeted ENKTL to achieve effective treatment of ENKTL under the dual treatment mode of chemotherapy and radiosensitization. This project improves the radiosensitivity of ENKTL and overcomes the multi-drug resistance of chemotherapeutics through the radiotherapy-cooperative natural nano-drug delivery system and provides a new idea for the further development and optimization of ENKTL treatment programs.