Chemoresistance conferred by leukemia propagating cells (LPCs) in a therapy-induced niche (TI-niche) within the bone marrow is one of the main obstacles in leukemia treatment. Effective approaches to circumvent the TI-niche protection and to eliminate the resident LPCs remain to be exploited. Here, developed is a niche-targeted nanosystem using leukemic cell membrane-coated mesoporous silica nanoparticles (DA(azo)@CMSN) for co-delivering daunorubicin for leukemia cell chemotherapy and a TGF beta RII neutralizing antibody (aTGF beta RII) to block niche signaling. DA(azo)@CMSN effectively targets the TI-niche. Through an azobenzene-based hypoxia-responsive linker, sequential delivery of the two active molecules overcomes niche-mediated chemoresistance, attenuates systemic burden, and prolongs survival in a mouse model of leukemia. This work demonstrates a proof-of-principle for biomimetic and microenvironment-activated multiplexed nanoparticulate drug delivery strategies for overcoming therapy-induced chemoresistance in leukemia.
基金:
National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [81572998, 81773274, 81800118, 31872842, 81730007, 81721004, 91442106, 81920108005]; Shanghai Municipal Science and Technology CommissionScience & Technology Commission of Shanghai Municipality (STCSM) [16520710700]; "Shu Guang" Program of Shanghai Education Development Foundation; Shanghai Municipal Education CommissionShanghai Municipal Education Commission (SHMEC) [16SG13]; Chinese Universities Scientific Fund