研究目的
To develop a multistage drug delivery system using liposome enclose carbon dots (CDs) in the aqueous center for improved tumor penetration and retention, combining chemotherapy and photothermal therapy for enhanced cancer treatment.
研究成果
The CDs-ICG-LPs demonstrated excellent tumor targeting, penetration, and retention, combining chemotherapy and photothermal therapy for enhanced antitumor activity. The system showed potential for effective cancer treatment with minimal systemic toxicity.
研究不足
The study acknowledges the technical constraints of NPs in delivering drugs into tumors, including the contradictory issue of size affecting tumor penetration and retention. Potential areas for optimization include improving the encapsulation efficiency and stability of the NPs for clinical application.
1:Experimental Design and Method Selection:
The study involved the synthesis of doxorubicin conjugated carbon dots (CDs-DOX) and indocyanine green (ICG)-loaded liposomes (CDs-ICG-LPs) using a modified reverse phase evaporation process. The methodology included the evaluation of the NPs' properties, stability, and therapeutic effects in vitro and in vivo.
2:Sample Selection and Data Sources:
HepG2 and H22 tumor cells were used for in vitro and in vivo studies, respectively.
3:List of Experimental Equipment and Materials:
Equipment included a Zetasizer Nano ZS for dynamic light scattering, TEM for morphologic examination, UV-Vis spectrometer, and multi-function plate reader. Materials included DOX, ICG, EPG, DSPE-mPEG2000, and cholesterol.
4:Experimental Procedures and Operational Workflow:
The study involved the preparation and characterization of CDs-DOX and CDs-ICG-LPs, evaluation of photostability, temperature response under NIR laser irradiation, in vitro DOX release, cytotoxicity, cellular uptake, apoptosis analysis, in vivo imaging, antitumor activities, and toxicity studies.
5:Data Analysis Methods:
Data were analyzed using SPSS software, with statistical significance defined as p < .05.
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Zetasizer Nano ZS
Nano ZS
Malvern Instruments
Determining the average diameter, zeta potential, and size distribution of nanoparticles.
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UV-Vis Spectrometer
UV-Probe-1700
Shimazu
Determining the absorption and fluorescence spectrum of ICG and CDs-DOX.
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Multi-function Plate Reader
Varioskan Flash
Thermo Fisher Scientific
Measuring optical density for cytotoxicity assessment.
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Infrared Thermal Imaging Camera
LaserSight
Optris
Monitoring temperature changes under laser irradiation.
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Transmission Electron Microscope
Morphologic examination of nanoparticles.
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NIR Laser Equipment
Changchun New Industries Optoelectronics Tech Co., Ltd.
Irradiating samples for photothermal therapy evaluation.
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FACSCalibur Flow Cytometer
FACSCalibur
BD Biosciences
Quantifying the uptake of DOX in cells.
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Confocal Laser Scanning Microscopy
Nikon C2+
Nikon
Observing intracellular localization of CDs, DOX, and ICG.
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