研究目的
开发一种具有高生物安全性的多功能纳米平台,用于FL/PA/SPECT多模态成像引导的肿瘤光热治疗。
研究成果
所开发的PEG-PTyr(125I)-ICG聚合物胶束是一种高效的多模态成像引导肿瘤光热治疗诊疗平台,具有优异的生物安全性,在未来临床试验中展现出巨大潜力。
研究不足
该研究聚焦于纳米平台的临床前评估,仍需进一步临床试验以评估其在人体中的有效性与安全性。
1:实验设计与方法选择:
本研究通过两亲性二嵌段聚合物的自组装,合成了ICG偶联和125I标记的聚合物胶束。方法包括Tyr-NCA与PEG2000-NH2的开环聚合、与ICG-Sulfo-OSu的酰胺化反应以及125I放射性标记。
2:样本选择与数据来源:
体内研究使用BEL-7402荷瘤裸鼠。
3:实验仪器与材料清单:
仪器包括核磁共振波谱仪、动态光散射仪、透射电子显微镜、紫外-可见分光光度计、荧光分光光度计等;材料包括PEG-NH2、Tyr-NCA、ICG-Sulfo-OSu、Na125I及各类溶剂。
4:Tyr-NCA、ICG-Sulfo-OSu、Na125I及各类溶剂。 实验步骤与操作流程:
4. 实验步骤与操作流程:聚合物合成、胶束制备、表征及体外体内评估(含成像与治疗)。
5:数据分析方法:
采用SPSS 19.0软件进行统计分析,数据以均值±标准差表示。
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Microplate reader
Varioskan Flash
Thermo Scientific
Used for optical absorbance measurements in cytotoxicity tests.
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Inverted fluorescence microscope
DMI 6000B
Leica
Used for observing cellular uptake behavior.
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Automatic gamma counter
2470
PerkinElmer
Used for recording radioactivity amounts of organs.
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Optical microscope
DMI 3000 B
Leica
Used for pathology analysis.
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Infrared thermal imaging camera
ST20 MAX
Fluke
Used for measuring temperature changes during photothermal therapy.
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Nuclear magnetic resonance spectrometer
300 MHz
Bruker
Used for analyzing the synthesized polymers.
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Dynamic light scattering spectrometer
BI-200SM
Malvern
Used for measuring the size distribution of polymeric micelles.
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Transmission electron microscope
Talos F200C
FEI
Used for observing the micromorphology of polymeric micelles.
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UV–vis spectrophotometer
UV-2550
Shimadzu
Used for UV–vis absorption spectra measurements.
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Fluorescence spectrophotometer
F-4600
Hitachi
Used for fluorescence spectra measurements.
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PEG-NH2
Mw = 2000
Fluka Corporation
Used in the synthesis of the block polymer PEG-PTyr.
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Tyr-NCA
Xi’an Ruixi Biological Technology Company
Used in the synthesis of the block polymer PEG-PTyr.
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ICG-Sulfo-OSu
Xi’an Ruixi Biological Technology Company
Used in the synthesis of the block polymer PEG-PTyr-ICG.
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Na125I
PerkinElmer Corporation
Used for radiolabeling the polymer PEG-PTyr-ICG.
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Chloramine-T
J&K Chemical Technology Company
Used in the radiolabeling process of the polymer PEG-PTyr-ICG.
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DMEM
Gibco Corporation
Culture medium for cell lines.
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FBS
Gibco Corporation
Serum supplement for cell culture medium.
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MTT
Gibco Corporation
Used in cytotoxicity tests.
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DAPI
Gibco Corporation
Used for staining cell nuclei.
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808 nm laser
LI-P20W
Laserwave
Used for photothermal therapy and photostability evaluation.
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