Hybrid liposome-erythrocyte drug delivery system for tumor therapy with enhanced targeting and blood circulation  

作　　者：Kehui Zhu Yingcan Xu Rui Zhong Wanjing Li Hong Wang Yee Shan Wong Subramanian Venkatraman Jiaxin Liu Ye Cao 

机构地区：[1]Institute of Blood Transfusion,Chinese Academy of Medical Sciences&Peking Union Medical College,Chengdu,China [2]Biomedical Engineering,School of Engineering,Temasek Polytechnic,Singapore,Singapore [3]School of Materials Science and Engineering,National University of Singapore,Singapore,Singapore

出　　处：《Regenerative Biomaterials》2023年第1期1021-1032,共12页再生生物材料（英文版）

基　　金：supported by CAMS Innovation Fund for Medical Sciences(No.2021-I2M-1-060);Sichuan Science and Technology Program(No.2022ZYD0094).

摘　　要：Liposome,a widely used drug delivery system(DDS),still shows several disadvantages such as dominant clearance by liver and poor target organ deposition.To overcome the drawbacks of liposomes,we developed a novel red blood cell(RBC)-liposome combined DDS to modulate the tumor accumulation and extend the blood circulation life of the existing liposomal DDS.Here,RBCs,an ideal natural carrier DDS,were utilized to carry liposomes and avoid them undergo the fast clearance in the blood.In this study,liposomes could either absorbed onto RBCs’surface or fuse with RBCs’membrane by merely altering the interaction time at 37℃,while the interaction between liposome and RBCs would not affect RBCs’characteristics.In the in vivo antitumor therapeutic efficacy study,1,2-dipalmitoyl-sn-glycero-3-phosphocholine(DPPC)liposomes attached onto RBCs’surfaces exhibited lung targeting effect(via RBC-hitchhiking approach)and reduced clearance in the liver,while DPPC liposomes fused with RBCs had prolong blood circulation up to 48 h and no enrichment in any organ.Furthermore,20 mol%of DPPC liposomes were replaced with pH-sensitive phospholipid 1,2-dioleoyl-Sn-glycero-3-phosphoethanolamine(DOPE)as it could respond to the low pH tumor microenvironment and then accumulate in the tumor.The DOPE attached/fusion RBCs showed partial enrichment in lung and about 5-8%tumor accumulation,which were significantly higher than(about 0.7%)the conventional liposomal DDS.Thus,RBC-liposome composite DDS is able to improve the liposomal tumor accumulation and blood circulation and shows the clinical application promises of using autologous RBCs for antitumor therapy.

关 键 词：liposomes ERYTHROCYTE RBC-hitchhiking blood circulation target delivery 

分 类 号：R318[医药卫生—生物医学工程]