目的:构建基于上转换光学成像/磁共振成像(UCL/MRI)的纳米材料UCNP-PEG-Trastuzumab,探讨其用于HER2高表达人乳腺癌细胞SKBR3的多模态显像研究。方法:采用课题组前期制备稀土掺杂钆的上转换纳米粒子(UCNP)与HER2受体特异结合的抗体曲妥...目的:构建基于上转换光学成像/磁共振成像(UCL/MRI)的纳米材料UCNP-PEG-Trastuzumab,探讨其用于HER2高表达人乳腺癌细胞SKBR3的多模态显像研究。方法:采用课题组前期制备稀土掺杂钆的上转换纳米粒子(UCNP)与HER2受体特异结合的抗体曲妥单抗(Trastuzumab)的偶联获得UCL/MRI靶向探针。以高表达HER2受体的人乳腺癌细胞SKBR3细胞为观察对象,通过噻唑蓝比色法(MTT)进行细胞毒性检测。加入靶向探针UCNP-PEG-Trastuzumab共同孵育作为实验组,细胞加入UCNP-PEG共同孵育作为对照组,不添加任何探针的细胞作为空白组,利用共聚焦显微镜和MRI进行体外细胞成像;进行视觉分析与比较各组细胞光学和MRI信号,检测其结合效率。结果:1透射电子显微镜下(TEM),UCNP呈球形颗粒状,粒径约60nm;在980nm波长光激发下,发出绿色的荧光;2体外毒性试验MTT结果表明UCNP-PEG对SKBR3细胞毒性较小;320μg/m l浓度的UC N P-PEG-Tr a st u z u m ab与SK BR 3细胞孵育30分钟后,UCL/M R I成像结果均显示UC N P-PEGTrastuzumab能与SKBR3细胞靶向性结合。结论:构建HER2受体靶向特异性探针UCNP-PEG-Trastuzumab,能在体外与目的细胞特异性结合。展开更多
Perovskite quantum dot light-emitting diodes(Pe-QLEDs)have shown immense application potential in display and lighting fields due to their narrow full-width at half maximum(FWHM)and high photoluminescence quantum yiel...Perovskite quantum dot light-emitting diodes(Pe-QLEDs)have shown immense application potential in display and lighting fields due to their narrow full-width at half maximum(FWHM)and high photoluminescence quantum yield(PLQY).Despite significant advancements in their performance,challenges such as defects and ion migration still hinder their long-term stability and operational efficiency.To address these issues,various optimization strategies,including ligand engineering,interface passivation,and self-assembly strategy,are being actively researched.This review focuses on the synthesis methods,challenges and optimization of perovskite quantum dots,which are critical for the commercialization and large-scale production of high-performance and stable Pe-QLEDs.展开更多
文摘目的:构建基于上转换光学成像/磁共振成像(UCL/MRI)的纳米材料UCNP-PEG-Trastuzumab,探讨其用于HER2高表达人乳腺癌细胞SKBR3的多模态显像研究。方法:采用课题组前期制备稀土掺杂钆的上转换纳米粒子(UCNP)与HER2受体特异结合的抗体曲妥单抗(Trastuzumab)的偶联获得UCL/MRI靶向探针。以高表达HER2受体的人乳腺癌细胞SKBR3细胞为观察对象,通过噻唑蓝比色法(MTT)进行细胞毒性检测。加入靶向探针UCNP-PEG-Trastuzumab共同孵育作为实验组,细胞加入UCNP-PEG共同孵育作为对照组,不添加任何探针的细胞作为空白组,利用共聚焦显微镜和MRI进行体外细胞成像;进行视觉分析与比较各组细胞光学和MRI信号,检测其结合效率。结果:1透射电子显微镜下(TEM),UCNP呈球形颗粒状,粒径约60nm;在980nm波长光激发下,发出绿色的荧光;2体外毒性试验MTT结果表明UCNP-PEG对SKBR3细胞毒性较小;320μg/m l浓度的UC N P-PEG-Tr a st u z u m ab与SK BR 3细胞孵育30分钟后,UCL/M R I成像结果均显示UC N P-PEGTrastuzumab能与SKBR3细胞靶向性结合。结论:构建HER2受体靶向特异性探针UCNP-PEG-Trastuzumab,能在体外与目的细胞特异性结合。
文摘Perovskite quantum dot light-emitting diodes(Pe-QLEDs)have shown immense application potential in display and lighting fields due to their narrow full-width at half maximum(FWHM)and high photoluminescence quantum yield(PLQY).Despite significant advancements in their performance,challenges such as defects and ion migration still hinder their long-term stability and operational efficiency.To address these issues,various optimization strategies,including ligand engineering,interface passivation,and self-assembly strategy,are being actively researched.This review focuses on the synthesis methods,challenges and optimization of perovskite quantum dots,which are critical for the commercialization and large-scale production of high-performance and stable Pe-QLEDs.
