Drug Efficacy Comparison of pH‐Sensitive and Non‐pH‐Sensitive Taxol Delivery Nanoparticles in Cancer Therapy

Abstract Taxol is one of the most widely used chemotherapeutic agents but is restricted by its poor solubility and severe side effects in clinical practice. To overcome these limitations, pH‐sensitive nanoparticles, Acetalated Dextran 6k ‐PEG 5k ‐PLA 2k ‐Taxol (ADPP‐PTX), non‐pH‐sensitive nanoparticles, and Propionic Anhydride modified Dextran 6k ‐PEG 5k ‐PLA 2k ‐Taxol (PDPP‐PTX) are developed for the delivery of Taxol. Compared with PDPP‐PTX, ADPP‐PTX shows higher sensitivity to acid response and greater anti‐proliferative effect on cancer cells. In the in vivo study, ADPP‐PTX treatment effectively suppresses the growth of tumors, while only half the dose of Taxol is used, which significantly reduces systemic toxicity compared with Taxol and PDPP‐PTX.