近年来,19F磁共振(19F magnetic resonance,19F-MR)分子成像在靶向药物递送领域展现了广阔的应用前景。鉴于19F原子较高的灵敏度以及体内缺乏内源性氟背景信号,以包括液态全氟化碳(perfluorocarbons,PFC)在内的许多纳米材料被研发和应...近年来,19F磁共振(19F magnetic resonance,19F-MR)分子成像在靶向药物递送领域展现了广阔的应用前景。鉴于19F原子较高的灵敏度以及体内缺乏内源性氟背景信号,以包括液态全氟化碳(perfluorocarbons,PFC)在内的许多纳米材料被研发和应用成为19F-MR成像的理想分子成像探针。19F-MR将分子成像技术与药物递送系统有机结合,从而实现对疾病的早期分子水平诊断、靶向治疗、疗效的实时监测与预后的精准判断。笔者对多种可用于19F-MR分子成像的纳米分子成像探针在靶向药物递送和智能化药物控释体系中的应用研究进展进行综述,讨论它们在该领域开展应用情况以及各自优缺点,以期为新型可用于19F-MR分子成像的多功能纳米材料的设计、制备、研发及应用提供理论依据和数据支撑。展开更多
Molecular imaging(MI)can provide not only structural images using traditional imaging techniques but also functional and molecular information using many newly emerging imaging techniques.Over the past decade,the util...Molecular imaging(MI)can provide not only structural images using traditional imaging techniques but also functional and molecular information using many newly emerging imaging techniques.Over the past decade,the utilization of nanotechnology in MI has exhibited many significant advantages and provided new opportunities for the imaging of living subjects.It is expected that multimodality nanoparticles(NPs)can lead to precise assessment of tumor biology and the tumor microenvironment.This review addresses topics related to engineered NPs and summarizes the recent applications of these nanoconstructs in cancer optical imaging,ultrasound,photoacoustic imaging,magnetic resonance imaging(MRI),and radionuclide imaging.Key challenges involved in the translation of NPs to the clinic are discussed.展开更多
More efficient drug delivery system and formulation with less adverse effects are needed for the clinical application of broad-spectrum antineoplastic agent doxorubicin(DOX). Here we obtained outer-membrane vesicles(O...More efficient drug delivery system and formulation with less adverse effects are needed for the clinical application of broad-spectrum antineoplastic agent doxorubicin(DOX). Here we obtained outer-membrane vesicles(OMVs), a nano-sized proteoliposomes naturally released by Gram-negative bacteria, from attenuated Klebsiella pneumonia and prepared doxorubicin-loaded O0MVs(DOX-OMV). Confocal microscopy and in vivo distribution study observed that DOX encapsulated in OMVs was efficiently transported into NSCLC A549 cells. DOX-OMV resulted in intensive cytotoxic effects and cell apoptosis in vitro as evident from MTT assay, Western blotting and flow cytometry due to the rapid cellular uptake of DOX. In A549 tumor-bearing BALB/c nude mice, DOX-OMV presented a substantial tumor growth inhibition with favorable tolerability and pharmacokinetic profile, and TUNEL assay and H&E staining displayed extensive apoptotic cells and necrosis in tumor tissues. More importantly, OMVs’ appropriate immunogenicity enabled the recruitment of macrophages in tumor microenvironment which might synergize with their cargo DOX in vivo. Our results suggest that OMVs can not only function as biological nanocarriers for chemotherapeutic agents but also elicit suitable immune responses, thus having a great potential for the tumor chemoimmunotherapy.展开更多
文摘近年来,19F磁共振(19F magnetic resonance,19F-MR)分子成像在靶向药物递送领域展现了广阔的应用前景。鉴于19F原子较高的灵敏度以及体内缺乏内源性氟背景信号,以包括液态全氟化碳(perfluorocarbons,PFC)在内的许多纳米材料被研发和应用成为19F-MR成像的理想分子成像探针。19F-MR将分子成像技术与药物递送系统有机结合,从而实现对疾病的早期分子水平诊断、靶向治疗、疗效的实时监测与预后的精准判断。笔者对多种可用于19F-MR分子成像的纳米分子成像探针在靶向药物递送和智能化药物控释体系中的应用研究进展进行综述,讨论它们在该领域开展应用情况以及各自优缺点,以期为新型可用于19F-MR分子成像的多功能纳米材料的设计、制备、研发及应用提供理论依据和数据支撑。
文摘Molecular imaging(MI)can provide not only structural images using traditional imaging techniques but also functional and molecular information using many newly emerging imaging techniques.Over the past decade,the utilization of nanotechnology in MI has exhibited many significant advantages and provided new opportunities for the imaging of living subjects.It is expected that multimodality nanoparticles(NPs)can lead to precise assessment of tumor biology and the tumor microenvironment.This review addresses topics related to engineered NPs and summarizes the recent applications of these nanoconstructs in cancer optical imaging,ultrasound,photoacoustic imaging,magnetic resonance imaging(MRI),and radionuclide imaging.Key challenges involved in the translation of NPs to the clinic are discussed.
基金sponsored by Scientific and Innovative Action Plan of Shanghai(No.18431902800,China)National Natural Science Foundation of China(No.81572979)+1 种基金Project of Shanghai Health and Family Planning Commission(201940102,China)National Key Basic Research Program of China(2015CB931800)
文摘More efficient drug delivery system and formulation with less adverse effects are needed for the clinical application of broad-spectrum antineoplastic agent doxorubicin(DOX). Here we obtained outer-membrane vesicles(OMVs), a nano-sized proteoliposomes naturally released by Gram-negative bacteria, from attenuated Klebsiella pneumonia and prepared doxorubicin-loaded O0MVs(DOX-OMV). Confocal microscopy and in vivo distribution study observed that DOX encapsulated in OMVs was efficiently transported into NSCLC A549 cells. DOX-OMV resulted in intensive cytotoxic effects and cell apoptosis in vitro as evident from MTT assay, Western blotting and flow cytometry due to the rapid cellular uptake of DOX. In A549 tumor-bearing BALB/c nude mice, DOX-OMV presented a substantial tumor growth inhibition with favorable tolerability and pharmacokinetic profile, and TUNEL assay and H&E staining displayed extensive apoptotic cells and necrosis in tumor tissues. More importantly, OMVs’ appropriate immunogenicity enabled the recruitment of macrophages in tumor microenvironment which might synergize with their cargo DOX in vivo. Our results suggest that OMVs can not only function as biological nanocarriers for chemotherapeutic agents but also elicit suitable immune responses, thus having a great potential for the tumor chemoimmunotherapy.
