Design and synthesis of fluorescence-labeled closo-dodecaborate lipid: its liposome formation and in vivo imaging targeting of tumors for boronneutron capture therapy
作者:Hiroyuki Nakamura、Noriko Ueda、Hyun Seung Ban、Manabu Ueno、Shoji Tachikawa
DOI:10.1039/c1ob06500a
日期:——
The fluorescence-labeled closo-dodecaborane lipid (FL-SBL) was synthesized from (S)-(+)-1,2-isopropylideneglycerol as a chiral starting material. FL-SBL was readily accumulated into the PEGylated DSPC liposomes prepared from DSPC, CH, and DSPE-PEG-OMe by the post insertion protocol. The boron concentrations and the fluorescent intensities of the FL-SBL-labeled DSPC liposomes increased with the increase of the additive FL-SBL, and the maximum emission wavelength of the liposomes appeared at 531 nm. A preliminary in vivo imaging study of tumor-bearing mice revealed that the FL-SBL-labeled DSPC liposomes were delivered to the tumor tissue but not distributed to hypoxic regions.
以(S)-(+)-1,2-异丙叉甘油作为手性起始原料,合成了荧光标记的闭式十二硼烷脂质(FL-SBL)。FL-SBL通过后插入协议,易于在由DSPC、CH和DSPE-PEG-OMe制备的聚乙二醇化DSPC脂质体中积累。随着添加的FL-SBL增加,FL-SBL标记的DSPC脂质体中硼浓度和荧光强度增加,脂质体的最大发射波长出现在531 nm。对荷瘤小鼠的初步体内成像研究表明,FL-SBL标记的DSPC脂质体被输送至肿瘤组织,但未分布于缺氧区域。