Dual Stimuli-Responsive Vesicular Nanospheres Fabricated by Lipopolymer Hybrids for Tumor-Targeted Photodynamic Therapy
作者:Johnson V. John、Chung-Wook Chung、Renjith P. Johnson、Young-Il Jeong、Kyu-Don Chung、Dae Hwan Kang、Hongsuk Suh、Hongyu Chen、Il Kim
DOI:10.1021/acs.biomac.5b01474
日期:2016.1.11
Smart delivery system of photosensitizer chlorin e6 (Ce6) has been developed for targeted photodynamic therapy (PDT). Simple self-assemblies of the mixtures comprising soybean lecithin derived phosphatidylcholine (PC), phosphatidylethanolamine-poly(l-histidine)40 (PE–p(His)40), and folic acid (FA) conjugated phosphatidylethanolamine-poly(N-isopropylacrylamide)40 (PE–p(NIPAM)40–FA) in different ratios yield smart nanospheres characterized by (i) stable and uniform particle size (∼100 nm), (ii) positive surface charge, (iii) high hydrophobic drug (Ce6) loading efficiency up to 45%, (iv) covalently linked targeting moiety, (v) low cytotoxicity, and (vi) smartness showing p(His) block oriented pH and p(NIPAM) oriented temperature responsiveness. The Ce6-encapsulated vesicular nanospheres (Ce6@VNS) were used to confirm the efficiency of cellular uptake, intracellular distribution, and phototoxicity against KB tumor cells compared to free Ce6 at different temperature and pH conditions. The Ce6@VNS system showed significant photodynamic therapeutic efficiency on KB cells than free Ce6. A receptor-mediated inhibition study proved the site-specific delivery of Ce6 in targeted tumor cells.
已开发出一种智能递送系统,用于光敏剂氯化铽(Ce6)的靶向光动力治疗(PDT)。将大豆卵磷脂衍生的磷脂酰胆碱(PC)、磷脂酰乙醇胺-聚(L-组氨酸)40(PE–p(His)40)和结合叶酸(FA)的磷脂酰乙醇胺-聚(N-异丙基丙烯酰胺)40(PE–p(NIPAM)40–FA)以不同比例简单自组装,形成特征显著的智能纳米球:(i) 稳定且均匀的粒子大小(约100 nm),(ii) 正的表面电荷,(iii) 高达45%的疏水性药物(Ce6)负载效率,(iv) 共价连接的靶向基团,(v) 低细胞毒性,(vi) 智能性,显示(p(His)链)基于pH的响应和(p(NIPAM)链)基于温度的响应。用包裹Ce6的囊泡纳米球(Ce6@VNS)确认了在不同温度和pH条件下,Ce6@VNS在KB肿瘤细胞中的细胞摄取、细胞内分布和光毒性的效率相较于游离Ce6。Ce6@VNS系统在KB细胞上的光动力治疗效率显著高于游离Ce6。受体介导的抑制研究证明了Ce6在靶向肿瘤细胞中的特定递送。