摘要
Despite decades of laboratory and clinical trials,breast cancer remains the main cause of cancer-related disease burden in women.Considering the metabolism destruction effect of metformin(Met)and cancer cell starvation induced by glucose oxidase(GOx),after their efficient delivery to tumor sites,GOx and Met may consume a large amount of glucose and produce sufficient hydrogen peroxide in situ.Herein,a pH-responsive epigallocatechin gallate(EGCG)-conjugated low-molecular-weight chitosan(LC-EGCG,LE)nanoparticle(Met–GOx/Fe@LE NPs)was constructed.The coordination between iron ions(Fe3+)and EGCG in this nanoplatform can enhance the efficacy of chemodynamic therapy via the Fenton reaction.Met–GOx/Fe@LE NPs allow GOx to retain its enzymatic activity while simultaneously improving its stability.Moreover,this pH-responsive nanoplatform presents controllable drug release behavior.An in vivo biodistribution study showed that the intracranial accumulation of GOx delivered by this nanoplatform was 3.6-fold higher than that of the free drug.The in vivo anticancer results indicated that this metabolism destruction/starvation/chemodynamic triple-combination therapy could induce increased apoptosis/death of tumor cells and reduce their proliferation.This triple-combination therapy approach is promising for efficient and targeted cancer treatment.
基金
the National Natural Science Foundation of China(Grant Nos.:82102767 and 82002655)
the 1·3·5 Project for Disciplines of Excellence-Clinical Research Incubation Project,West China Hospital,Sichuan University,China(Grant No.:2020HXFH036)
the Knowledge Innovation Program of the Chinese Academy of Sciences,China(Grant No.:JH2022007)
the Cultivation Project of Basic Medical College of Xinxiang Medical University,China(Grant No.:JCYXYKY202112)
the Key Project of Science and Technology of Henan Province,China(Grant No.:222102310260).
