目的:以阿替洛尔作为模型药物,旨在开发一种基于聚乙烯亚胺修饰的二硫化钼纳米粒(polyethyleneimine-modified Mo S2nanoparticles,PEI-Mo S2NPs)的近红外激光控释的经皮递药系统(transdermal drug delivery system,TDDS)。方法:通过一...目的:以阿替洛尔作为模型药物,旨在开发一种基于聚乙烯亚胺修饰的二硫化钼纳米粒(polyethyleneimine-modified Mo S2nanoparticles,PEI-Mo S2NPs)的近红外激光控释的经皮递药系统(transdermal drug delivery system,TDDS)。方法:通过一步水热合成法制备3D花瓣状结构的PEI-Mo S2NPs,并通过衰减全反射傅里叶变换红外光谱、X射线衍射分析、扫描电子显微镜和透射电子显微镜对其进行结构表征。通过体外药物释放实验和体外透皮实验研究PEI-Mo S2NPs的控释能力。结果:PEI-Mo S2NPs具有良好的药物负载效率(53.86%)和较高的光热转换能力。近红外激光刺激使阿替洛尔的释放增加了1.56倍。结论:近红外激光可用于控制PEI-Mo S2NPs中药物的释放,促进药物的经皮渗透。展开更多
In vivo confocal laser scanning microscopy (CLSM) represents a novel imaging tool that allows the examination of skin morphology in real time at a resolution equal to that of conventional microscopes. The aim of the s...In vivo confocal laser scanning microscopy (CLSM) represents a novel imaging tool that allows the examination of skin morphology in real time at a resolution equal to that of conventional microscopes. The aim of the study was to test the applicability of CLSM to the diagnostic discrimination of benign nevi and melanoma. five independent observers without previous experience in CLSM received a standardized instruction about diagnostic CLSM features. Subsequently, 117 melanocytic skin tumors (90 benign nevi and 27 melanoma), imaged using a commercially available, near- infrared, reflectance confocal laser scanning microscope, were evaluated by each observer. Overall, sensitivity of 88.15% and specificity of 97.60% was achieved by the five observers. Logistic regression analysis revealed that mainly cytomorphology, architecture and keratinocyte cell borders should be taken into account for diagnostic decisions. Remarkably, using the presence or absence of monomorphic melanocytes as a single diagnostic criterion, the classification results with a sensitivity of 98.15% and a specificity of 98.89% were superior to the intuitive, integrative judgement of the observers. This first sensitivity and specificity study with CLSM has yielded promising results. CLSM provides new and useful information to the clinician diagnosing melanocytic skin tumors.展开更多
Glucose oxidase(GOx)-based nanotheranostic agents hold great promise in tumor starvation and its synergistic therapy. Self-assembled plasmonic gold vesicles(GVs) with unique optical properties, large hollow cavity, an...Glucose oxidase(GOx)-based nanotheranostic agents hold great promise in tumor starvation and its synergistic therapy. Self-assembled plasmonic gold vesicles(GVs) with unique optical properties, large hollow cavity, and strong localized surface plasmon resonance, can be used as multi-functional nanocarriers for synergistic therapy. Herein,GOx-loaded GVs(GV-GOx) were developed for light-triggered GOx release as well as enhanced catalytic activity of GOx, achieving programmable photothermal/starvation therapy. Under near-infrared laser irradiation, the GV-GOx generated strong localized hyperthermia due to plasmon coupling effect of GVs, promoting the release of encapsulated GOx and increasing its catalytic activity, resulting in enhanced tumor starvation effect. In addition, the high photothermal effect improved the cellular uptake of GV-GOx and allowed an efficient monitoring of synergistic tumor treatment via photoacoustic/photothermal duplex imaging in vivo. Impressively, the synergistic photothermal/starvation therapy demonstrated complete tumor eradication in 4 T1 tumorbearing mice, verifying superior synergistic anti-tumor therapeutic effects than monotherapy with no apparent systemic side effects. Our work demonstrated the development of a light-triggered nanoplatform for cancer synergistic therapy.展开更多
文摘In vivo confocal laser scanning microscopy (CLSM) represents a novel imaging tool that allows the examination of skin morphology in real time at a resolution equal to that of conventional microscopes. The aim of the study was to test the applicability of CLSM to the diagnostic discrimination of benign nevi and melanoma. five independent observers without previous experience in CLSM received a standardized instruction about diagnostic CLSM features. Subsequently, 117 melanocytic skin tumors (90 benign nevi and 27 melanoma), imaged using a commercially available, near- infrared, reflectance confocal laser scanning microscope, were evaluated by each observer. Overall, sensitivity of 88.15% and specificity of 97.60% was achieved by the five observers. Logistic regression analysis revealed that mainly cytomorphology, architecture and keratinocyte cell borders should be taken into account for diagnostic decisions. Remarkably, using the presence or absence of monomorphic melanocytes as a single diagnostic criterion, the classification results with a sensitivity of 98.15% and a specificity of 98.89% were superior to the intuitive, integrative judgement of the observers. This first sensitivity and specificity study with CLSM has yielded promising results. CLSM provides new and useful information to the clinician diagnosing melanocytic skin tumors.
基金supported by the National Natural Science Foundation of China (31771036 and 51703132)the Basic Research Program of Shenzhen (JCYJ20180507182413022 and JCYJ20170412111100742)+1 种基金Guangdong Province Natural Science Foundation of Major Basic Research and Cultivation Project(2018B030308003)Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China (161032)。
文摘Glucose oxidase(GOx)-based nanotheranostic agents hold great promise in tumor starvation and its synergistic therapy. Self-assembled plasmonic gold vesicles(GVs) with unique optical properties, large hollow cavity, and strong localized surface plasmon resonance, can be used as multi-functional nanocarriers for synergistic therapy. Herein,GOx-loaded GVs(GV-GOx) were developed for light-triggered GOx release as well as enhanced catalytic activity of GOx, achieving programmable photothermal/starvation therapy. Under near-infrared laser irradiation, the GV-GOx generated strong localized hyperthermia due to plasmon coupling effect of GVs, promoting the release of encapsulated GOx and increasing its catalytic activity, resulting in enhanced tumor starvation effect. In addition, the high photothermal effect improved the cellular uptake of GV-GOx and allowed an efficient monitoring of synergistic tumor treatment via photoacoustic/photothermal duplex imaging in vivo. Impressively, the synergistic photothermal/starvation therapy demonstrated complete tumor eradication in 4 T1 tumorbearing mice, verifying superior synergistic anti-tumor therapeutic effects than monotherapy with no apparent systemic side effects. Our work demonstrated the development of a light-triggered nanoplatform for cancer synergistic therapy.
