Preparation and characteristics of targeted phase-shift lipid nanoparticles mediated by tumor homing and penetrating peptide
10.3760/cma.j.issn.1004-4477.2016.12.012
- VernacularTitle:肿瘤归巢穿膜肽介导的靶向相变脂质纳米粒的制备及特性研究
- Author:
Leilei ZHU
;
Jianli REN
;
Zhiyi ZHOU
;
Yonghong XIA
;
Hongyun ZHAO
;
Zhigang WANG
- Keywords:
Low intensity focused ultrasound;
Ultrasound molecular imaging;
Tumor homing and penetrating peptide;
Phasetransition;
Lipid nanoparticles
- From:Chinese Journal of Ultrasonography
2016;25(12):1069-1075
- CountryChina
- Language:Chinese
-
Abstract:
Objective To prepare a novel ultrasound contrast agent , targeted phase-shift lipid nanoparticles mediated by tumor homing and penetrating peptide tLyP-1 ,and to evaluate its characteristics . Methods The nanoparticles were prepared by filming-rehydration and acoustic-vibration methods .The morphology ,distribution ,particle size and zeta potential were detected . After heating and irradiating of low intensity focused ultrasound ( LIFU) ,the phase-shift characteristic and the enhancement effect in vitro were observed . The tumor homing and cell-penetrating properties of the nanoparticles were examined by confocal laser scanning microscopy and flow cytometry . The cytotoxicity of the nanoparticles was evaluated by CCK 8 assay . Results The size and distribution of nanoparticles were uniformed . The size and zeta potential of nanoparticles were ( 399 .50 ± 29 .98) nm and ( 3 .28 ± 1 .72) mV ,respectively . When the nanoparticles were heated to a temperature of 45 ℃ or after irradiated by LIFU ,nanoparticles generated phase-shift and enhanced ultrasound imaging in vitro ( P < 0 .05 ) . The confocal laser scanning microscopy showed that nanoparticles mediated by tLyP-1 can targetedly aggregate to cell membrane of MDA-MB-231 and penetrate into the cell ,but not to HUVEC . The flow cytometry showed that intracellular fluorescence intensity of nanoparticles mediated by tLyP-1 in MDA-MB-231 group was higher than that in control groups ( P <0 .05) . The CCK8 assay indicated that different concentrations of nanoparticles had no significant effects on cell activity ( P > 0 .05 ) . Conclusions A novel ultrasound contrast agent , targeted phase-shift lipid nanoparticles mediated by tumor homing and penetrating peptide tLyP-1 ,is prepared successfully . It can target to MDA-MB-231 cell and penetrate into the cell in vitro ,and enhance ultrasound imaging in vitro after LIFU irradiation ,which expected to become a novel tumor targeted ultrasound contrast agent and achieve ultrasound molecular imaging at the level of tumor cell .
