title: Polymeric capsule-cushioned leukocyte cell membrane vesicles as a biomimetic delivery platform.
abstract: We report a biomimetic delivery of microsized capsule-cushioned leukocyte membrane vesicles (CLMVs) through the conversion of freshly reassembled leukocyte membrane vesicles (LMVs), including membrane lipids and membrane-bound proteins onto the surface of layer-by-layer assembled polymeric multilayer microcapsules. The leukocyte membrane coating was verified by using electron microscopy, a quartz crystal microbalance, dynamic light scattering, and confocal laser scanning microscopy. The resulting CLMVs have the ability to effectively evade clearance by the immune system and thus prolong the circulation time in mice. Moreover, we also show that the right-side-out leukocyte membrane coating can distinctly improve the accumulation of capsules in tumor sites through the molecular recognition of membrane-bound proteins of CLMVs with those of tumor cells in vitro and in vivo. The natural cell membrane camouflaged polymeric multilayer capsules with the immunosuppressive and tumor-recognition functionalities of natural leukocytes provide a new biomimetic delivery platform for disease therapy.
authors.affiliation: State Key Laboratory of Robotics and System (HIT), Micro/Nanotechnology Research Center, Harbin Institute of Technology, Yikuangjie 2, Harbin 150080, China. qianghe@hit.edu.cn.
authors.forename: Changyong
authors.initials: C
authors.lastname: Gao
authors.forename: Zhiguang
authors.initials: Z
authors.lastname: Wu
authors.forename: Zhihua
authors.initials: Z
authors.lastname: Lin
authors.forename: Xiankun
authors.initials: X
authors.lastname: Lin
authors.forename: Qiang
authors.initials: Q
authors.lastname: He
mesh_terms: D000818:Animals; D040761:Biomimetic Materials / Q000737:chemistry / Q000494:pharmacology; D002214:Capsules; D045744:Cell Line, Tumor; D002462:Cell Membrane / Q000737:chemistry*; D006801:Humans; D007962:Leukocytes / Q000737:chemistry*; D008297:Male; D008563:Membrane Lipids / Q000737:chemistry / Q000494:pharmacology; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D009374:Neoplasms, Experimental / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D023041:Xenograft Model Antitumor Assays
chemical_list: D002214:Capsules; D008563:Membrane Lipids