研究目的
本研究旨在开发负载全氟戊烷(PFP)、吲哚菁绿(ICG)和奥沙利铂(OXP)的相变纳米颗粒(OI_NPs),以增强化疗、光动力疗法和声动力疗法(PSDT)的抗肿瘤疗效及免疫效应。
研究成果
负载适当载药的OI_NPs的应用,可能代表一种增强抗肿瘤效果、提高免疫效力并改善双模态成像的新策略。
研究不足
该研究仅探索了OI_NPs联合PSDT在体外的应用。未来工作应研究这种联合疗法在体内的效果,以确定肿瘤抗原释放到肿瘤微环境中是否会激活特定免疫细胞(如T淋巴细胞亚群)的浸润。
1:实验设计与方法选择:
采用双乳化法制备OI_NPs,并对其一系列理化性质及双模态成像特征进行表征。
2:样本选择与数据来源:
使用ID8细胞(与C57BL/6小鼠同源)。
3:实验设备与材料清单:
PLGA、PFP、OXP、ICG、超声探头、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、动态光散射(DLS)、紫外-可见分光光度计(UV-Vis)、荧光分光光度计、共聚焦激光扫描显微镜(CLSM)、流式细胞术、MTT实验、蛋白质印迹法(Western blotting)、发光检测法。
4:实验流程与操作步骤:
通过CLSM和流式细胞术测定ID8细胞对OI_NPs的摄取情况;采用MTT实验和流式细胞术检测ID8细胞的存活率及凋亡率;随后利用流式细胞术、蛋白质印迹法及发光检测法研究关键DAMPs的暴露或释放情况。
5:数据分析方法:
使用GraphPad Prism(6.0版)进行数据分析,所有数值以均值±标准差(SD)表示。采用方差分析(ANOVA)结合Dunnett检验、非配对学生t检验或配对学生t检验进行数据分析。
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SEM
FEI Inspect F50
FEI Company
Used to investigate the morphology and structure of the nanoparticles.
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DLS
Zetasizer Nano ZS
Malvern Instruments
Used to determine the diameter, polydispersity index (PDI), and surface potential of different NPs.
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UV-Vis spectrophotometer
260-Bio
Thermo Fisher Scientific
Used to evaluate the entrapment efficiency and loading of ICG.
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fluorescence spectrometer
Cray Eclipse
Agilent Technologies
Used to detect the emission spectra of each sample.
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CLSM
Leica TCS SP8
Leica
Used to evaluate cellular uptake ability.
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TEM
FEI Tecnai G2 F20
FEI Company
Used to investigate the morphology and structure of the nanoparticles.
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PLGA
Medical Polymer Materials
Used as a carrier for the nanoparticles.
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PFP
Strem Chemicals
Used as a component of the phase-transition nanoparticles.
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OXP
MedChemExpress
Used as a chemotherapeutic drug loaded into the nanoparticles.
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ICG
Aladdin
Used as a photo/sonosensitizer loaded into the nanoparticles.
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ultrasonic probe
Sonics & Materials, Inc
Used for sonication in the preparation of nanoparticles.
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ultrasonic diagnostic instrument
MyLab 90
Esaote
Used to capture contrast-enhanced ultrasound (CEUS), and B-mode images.
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PA imaging system
VEVO LASR
FUJIFILM Visual Sonic, Inc
Used to obtain and analyze PA-mode signals of the samples.
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MTT assay
Used to determine cell viability.
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flow cytometry
Used to analyze apoptosis and CRT expression on the cell surface.
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Western blotting
Used to detect the release of HMGB1 into the cell culture supernatant and its translocation to the cytoplasm.
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Luminometric ATP Assay Kit
AAT Bioquest
Used to quantify the secretion of ATP into the supernatant.
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DCFH-DA
Used as an indicator of fluorescence to detect the generation of intracellular ROS.
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lactate cytotoxicity assay kit
Beyotime Co
Used to assess LDH release.
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