ACS Nano
·
2023
·
IF 17.1
Weitao Yang,Cuijun Deng,Xiudong Shi,Yan Xu,Chenyu Dai,Hui Wang,Kexin Bian,Tianming Cui,Bingbo Zhang
Enhanced imaging techniques using contrast agents enable high-resolution structural imaging to reveal space-occupying lesions but rarely provide detailed molecular information. To this end, we report a structural and molecular fusion magnetic resonance imaging (MRI) nanoprobe for differential diagnosis between benign and malignant tumors. This fusion nanoprobe, termed FFT NPs, follows a working mechanism involving a T1-/T2-weighted magnetic resonance tuning effect (MRET) between a magnetic Fe3O4 core and a paramagnetic Fe-tannic acid (Fe-TA) shell. The FFT NPs with an “always-on” inert T2 signal provide structural MRI (sMRI) contrast of tumors while affording an activated T1 signal in the presence of ATP, which is overproduced during the rapid growth of malignant tumors to enable molecular MRI (mMRI) of tumor lesions. We propose the use of the ratiometric mMRI:sMRI intensity to assist in the differential diagnosis of malignant 4T1 tumors from benign L929 fibroblast tumors. Furthermore, the dissociated FFT NPs were found to be able to catalyze H2O2 conversion in 4T1 tumors to generate excess reactive oxygen species (ROS) for chemodynamic therapy. The described fusion nanoprobe strategy enables the differential diagnosis of tumors from a combined spatial and molecular perspective with one-stop MRI imaging with potential applications in precision intervention.
研究领域:
医学影像
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纳米技术
·
癌症研究
·
分子生物学
·
诊疗学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 60
·37929-37937
·
IF 3.108
Yang Luo,Sinan Du,Wei Zhang,Zhengfang Liao,Fang Zuo,Shengtao Yang
Core@shell structures of Fe3O4@Mn2+-doped NaYF4:Yb/Tm nanoparticles (NPs) with multifunctional properties were prepared using a hydrothermal route with a seed-growth procedure. The effect of Mn2+ ions on the phase, shape, and upconversion luminescence (UCL) of Fe3O4@Mn2+-doped NaYF4:Yb/Tm NPs was explored using X-ray diffraction, transmission electron microscopy, dynamic light scattering, and photoluminescence spectroscopy. Furthermore, hydrophobic to hydrophilic surface modification of the Fe3O4@Mn2+-doped NaYF4:Yb/Tm NPs was achieved by coating the NPs with an amphiphilic polymer (poly(maleic anhydride-alt-1-octadecene) (C18PMH)) modified with amine-functionalized methyl ether poly(ethylene glycol). Then, the NIR-to-NIR UCL ascribed to the Tm3+ ions, T1-weighted MRI ascribed to the Mn2+ ions, and T2-weighted MRI ascribed to the Fe3O4 core of the hydrophilic Fe3O4@Mn2+-doped NaYF4:Yb/Tm NPs were evaluated. The results indicate that Mn2+ doping is an effective method to control the size/shape and improve the UCL intensity of Fe3O4@Mn2+-doped NaYF4:Yb/Tm NPs, which are promising as imaging agents for NIR-to-NIR UCL and T1/T2-weighted MRI in biomedical research.
研究领域:
生物医学工程
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材料科学
·
影像医学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Meilin Shi,Shan Wang,Shaohui Zheng,Pingfu Hou,Lina Dong,Meijuan He,Chen Wu,Xiuli Zhang,Fengmei Zuo,Kai Xu,Jingjing Li
Multifunctional nanocarriers, which can be used for molecular imaging and drug delivery simultaneously, favor the fabrication of theranostic platforms in a less cost- and time-consuming way. Polyethylene glycol (PEG)-modified manganese dioxide (MnO 2 ) nanosheets (PEG-MnO 2 ), used as two-dimensional nanomaterials, not only possess the high surface-to-volume ratio necessary for drug delivery but also display a redoxable property in the tumor microenvironment, producing Mn 2+ ions for magnetic resonance imaging (MRI). In this study, we constructed a PEG-MnO 2 -OPN siRNA nanocomplex via a modular streptavidin bridge for the theranostic treatment of renal carcinoma in vitro and in vivo . This strategy of utilizing PEG-MnO 2 nanosheets for OPN siRNA delivery showed effective tumor growth inhibition of 786-O tumor-bearing mice, and such a process could be monitored by the activated T 1 -weight MRI, illustrating the promising potential of PEG-MnO 2 nanosheets for the fabrication of an MRI-based theranostic system.
研究领域:
生物医学工程
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药学
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癌症研究
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMACROMOLECULES
·
2015
·
IF 5.75
Yue Liu,Benjamin W. Muir,Lynne J. Waddington,Tracey M. Hinton,Bradford A. Moffat,Xiaojuan Hao,Jieshan Qiu,Timothy C. Hughes
The use of medical imaging contrast agents may lead to improved patient prognosis by potentially enabling an earlier detection of diseases and therefore an earlier initiation of treatments. In this study, we fabricated superparamagnetic iron oxide (SPIO) nanoparticles within the inner cavity of multiwalled carbon nanotubes (MWCNTs) for the first time; thereby ensuring high mechanical stability of the nanoparticles. A simple, but effective, self-assembled coating with RAFT diblock copolymers ensured the SPIO-MWCNTs have a high dispersion stability under physiological conditions. In vivo acute tolerance testing in mice showed a high tolerance dose up to 100 mg kg–1. Most importantly, after administration of the material a 55% increase in tumor to liver contrast ratio was observed with in vivo MRI measurements compared to the preinjection image enhancing the detection of the tumor.
研究领域:
医学影像学
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纳米医学
·
生物材料学
✓ 已验证
DOI
PubMed
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 8
·3991-3999
·
IF 6.7
Lei Chen,Yun Gao,Jianxian Ge,Yi Zhou,Zhe Yang,Cang Li,Baoxing Huang,Kuan Lu,Dandan Kou,Dandan Zhou,Can Chen,Sixia Wang,Shuwang Wu,Jianfeng Zeng,Gang Huang,Mingyuan Gao
Magnetic resonance imaging (MRI)/nuclear medicine imaging (NMI) dual-modality imaging based on radiolabeled nanoparticles has been increasingly exploited for accurate diagnosis of tumor and cardiovascular diseases by virtue of high spatial resolution and high sensitivity. However, significant challenges exist in pursuing truly clinical applications, including massive preparation and rapid radiolabeling of nanoparticles. Herein, we report a clinically translatable kit for the convenient construction of MRI/NMI nanoprobes relying on the flow-synthesis and anchoring group-mediated radiolabeling (LAGMERAL) of iron oxide nanoparticles. First, homogeneous iron oxide nanoparticles with excellent performance were successfully obtained on a large scale by flow synthesis, followed by the surface anchoring of diphosphonate-polyethylene glycol (DP-PEG) to simultaneously render the underlying nanoparticles biocompatible and competent in robust labeling of radioactive metal ions. Moreover, to enable convenient and safe usage in clinics, the DP-PEG modified nanoparticle solution was freeze-dried and sterilized to make a radiolabeling kit followed by careful evaluations of its in vitro and in vivo performance and applicability. The results showed that 99mTc labeled nanoprobes are effectively obtained with a labeling yield of over 95% in 30 minutes after simply injecting Na[99mTcO4] solution into the kit. In addition, the Fe3O4 nanoparticles sealed in the kit can well stand long-term storage even for 300 days without deteriorating the colloidal stability and radiolabeling yield. Upon intravenous injection of the as-prepared radiolabeled nanoprobes, high-resolution vascular images of mice were obtained by vascular SPECT imaging and magnetic resonance angiography, demonstrating the promising clinical translational value of our radiolabeling kit.
研究领域:
医学影像学
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纳米医学
·
放射化学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Jie Yin,Dajing Yao,Guangfu Yin,Zhongbing Huang,Ximing Pu
Magnetic resonance imaging (MRI) is widely applied in medical research and diagnosis, and a MRI contrast medium plays a crucial role in improving the sensitivity of detection. Ultrasmall superparamagnetic iron oxides (USPIOs) exhibit the potential as a T2 enhancement contrast medium for MRI due to their excellent magnetic response performance; however, to endow them with specific tumor targetability, long-term circulation performance has always been a hot topic in this field. In this study, a well-designed procedure of chemical coprecipitation, surface modification, and peptide grafting was applied to prepare the active tumor-targeting USPIOs@F127-WSG, in which Pluronic F127 (F127) and the peptide WSGPGVWGASVK (peptide-WSG) were selected as the template agent and the ovarian tumor-targeting ligand, respectively. The results showed that single USPIOs@F127-WSG particles were Fe3O4 nanoparticles regulated by the confinement effect of F127 micelles with a uniform globular morphology and size (∼9 nm), and peptide-WSG was grafted for their tumor targetability. USPIOs@F127-WSG particles presented superparamagnetic behavior with high T2 relaxivity (r2 = 278.15 mM–1 s–1) and in vitro targetability for SKOV-3 cells due to the special binding between peptide-WSG and specific receptors of SKOV-3. The test results in vivo verified the targetability of USPIOs@F127-WSG by their specific aggregation in the tumor regions, leading to the T2-weighted MRI contrast enhancement. These outstanding properties indicate that USPIOs@F127-WSG have great potential to be applied as the active tumor-targeting contrast agent for MRI.
研究领域:
医学影像学
·
纳米医学
·
肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOBIOTECHNOLOGY
·
2024
·Vol. 22
·期 1
·1-15
·
IF 10.6
Chen Can,Huang Baoxing,Zhang Ruru,Sun Chaoping,Chen Lei,Ge Jianxian,Zhou Dandan,Li Yueping,Wu Shuwang,Qian Zhiyuan,Zeng Jianfeng,Gao Mingyuan
Background The general sluggish clearance kinetics of functional inorganic nanoparticles tend to raise potential biosafety concerns for in vivo applications. Renal clearance is a possible elimination pathway for functional inorganic nanoparticles delivered through intravenous injection, but largely depending on the surface physical chemical properties of a given particle apart from its size and shape. Results In this study, three small-molecule ligands that bear a diphosphonate (DP) group, but different terminal groups on the other side, i.e. , anionic, cationic, and zwitterionic groups, were synthesized and used to modify ultrasmall Fe 3 O 4 nanoparticles for evaluating the surface structure-dependent renal clearance behaviors. Systematic studies suggested that the variation of the surface ligands did not significantly increase the hydrodynamic diameter of ultrasmall Fe 3 O 4 nanoparticles, nor influence their magnetic resonance imaging (MRI) contrast enhancement effects. Among the three particle samples, Fe 3 O 4 nanoparticle coated with zwitterionic ligands, i.e. , Fe 3 O 4 @DMSA, exhibited optimal renal clearance efficiency and reduced reticuloendothelial uptake. Therefore, this sample was further labeled with 99m Tc through the DP moieties to achieve a renal-clearable MRI/single-photon emission computed tomography (SPECT) dual-modality imaging nanoprobe. The resulting nanoprobe showed satisfactory imaging capacities in a 4T1 xenograft tumor mouse model. Furthermore, the biocompatibility of Fe 3 O 4 @DMSA was evaluated both in vitro and in vivo through safety assessment experiments. Conclusions We believe that the current investigations offer a simple and effective strategy for constructing renal-clearable nanoparticles for precise disease diagnosis. Graphical Abstract
研究领域:
医学影像学
·
纳米医学
·
生物材料
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产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 28
·13402-13409
·
IF 7.233
Sihan Ma,Jiaxin Zhang,Shibo Xia,Wenyan Yin,Yanxia Qin,Runhong Lei,Jianglong Kong,Linqiang Mei,Juan Li,Gengmei Xin,Gongping Li
Designing nanosized multi-modality contrast agents for high-resolution imaging is challenging since most agents are only useful for single-mode imaging. In this work, we successfully synthesized biocompatible polyethylene glycol (PEG-) and L-glutamine (GLN-) modified Ba4Yb3F17:Lu3+,Gd3+ nanoparticles (LNPs@PEG@GLN) that can be employed as a multi-modality contrast agent. Fluorescence dye-modified LNPs@PEG@GLN nanoparticles can be used for computed tomography (CT), magnetic resonance imaging (MRI), and fluorescence imaging (FI). They display high X-ray absorption, outstanding T2-weighted imaging capability, and good fluorescence uptake. Furthermore, LNPs@PEG@GLN enhances contrast efficiencies for different imaging modalities in vivo. Interestingly, LNPs@PEG@GLN is a promising agent for CT angiography. These nanoparticles could be a promising contrast agent for multi-modality imaging and diagnosing vascular diseases.
研究领域:
医学影像学
·
纳米医学
·
分子影像学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2024
·
IF 15.8
Qingqing Cheng,Yanzhou Chang,Dong Zhang,Xiangsheng Zhao,Zeyu Xiao,Tianfeng Chen,Changzheng Shi,Liangping Luo
Ultrahigh field magnetic resonance imaging (UHF-MRI) (≥7 T) can dramatically boost image resolution and signal-to-noise ratio, which have distinct advantages in multifunctional imaging. However, their research and application are currently limited by the absence of high-field contrast agents (CAs) and the low sensitivity and accuracy of T1/T2 single-modality CAs. Therefore, the development of T1–T2 dual-mode CAs that respond to UHF-MRI and nanoformulations with therapeutic sensitization can bring ideas for the integrated application of precise and synchronous tumor theranostics. Herein, we present a biomimetic mineralization strategy for synthesizing holmium/manganese oxide–bovine serum albumin–photosensitizer chlorin e6 nanohybrids. The hybrid nanoparticles exhibited better tumor accumulation, a suitable time imaging window, and excellent pH-response T1–T2 dual-mode UHF-MRI performance. The antitumor effect comes from the amelioration of the hypoxic tumor microenvironment to promote the synergistic effect of photodynamic therapy and radiotherapy, along with negligible acute toxicity. Undoubtedly, this work not only provides a different perspective for developing multifunctional nanotherapeutics but also promotes the potential clinical exploitation and translation of UHF CAs.
研究领域:
纳米技术
·
磁共振成像
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癌症诊疗学
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材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Ying Hu,Shuangshuang Guo,Jun Liu,Yuhao Yang,Jing Wang,Miaomiao Chen,Wenqian Zhao,Dandan Fan,Yuchuan Zhuang,Jing Li,Yanbo Dong,Andrey Tulupov,Xiao Wang,Jianfeng Bao
Emerging nanotechnologies in cancer therapy increasingly highlight the importance of integrating therapeutic and diagnostic functions into a single platform for enhanced efficacy and real-time monitoring. Here, we present a vortex‐shaped nanoring Fe 3 O 4 @MnO 2 @PDA (polydopamine) engineered for dual‐mode T 1 – T 2 magnetic resonance imaging (MRI)‐guided, dual‐thermal, and Fenton‐like chemodynamic therapy (CDT). The ring‐shaped nano Fe 3 O 4 core provides magnetothermal hyperthermia, while the MnO 2 layer, acting as a responsive nanozyme, catalyzes endogenous H 2 O 2 to generate oxygen and bolster CDT. Meanwhile, the PDA coating efficiently absorbs near‐infrared light, amplifying photothermal effects for tumor ablation. Under dual‐heating conditions, the temperature rise rate (2.05–2.92 times) and final equilibrium temperatures (1.57–2.27 times) exceed those of single‐mode heating, underscoring a robust synergistic effect. Additionally, due to the shell’s shielding effect weakening T 2 signals and the tumor microenvironment enhancing T 1 relaxation, the T 1 (5.75 Mm −1 s −1 ) to T 2 (91.56 mM −1 s −1 ) ratio is optimized specifically at tumor sites, thus achieving effective dual‐modal MRI contrast. Moreover, the smart MnO 2 design not only furnishes dynamic imaging enhancements but also enables environment‐triggered Mn 2+ release, offering further diagnostic and therapeutic benefits. In vitro and in vivo evaluations confirm significant tumor suppression with minimal systemic toxicity. These findings position nanoring Fe 3 O 4 @MnO 2 @PDA as a promising dual‐mode MRI‐guided, dual‐thermal, and chemodynamic platform for advanced cancer therapy.
研究领域:
纳米技术
·
癌症治疗
·
诊断成像
·
磁共振成像
·
生物医学工程
·
诊疗一体化
·
生物无机化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-12
·
IF 17.694
Lu Hongwei,Chen An,Zhang Xindan,Wei Zixiang,Cao Rong,Zhu Yi,Lu Jingxiong,Wang Zhongling,Tian Leilei
Magnetic resonance imaging (MRI) is a non-invasive imaging technology to diagnose health conditions, showing the weakness of low sensitivity. Herein, we synthesize a contrast agent, SPIO@SiO 2 @MnO 2 , which shows decreased T 1 and T 2 contrast intensity in normal physiological conditions. In the acid environment of tumor or inflamed tissue, the manganese dioxide (MnO 2 ) layer decomposes into magnetically active Mn 2+ (T 1 -weighted), and the T 1 and T 2 signals are sequentially recovered. In addition, both constrast quenching-activation degrees of T 1 and T 2 images can be accurately regulated by the silicon dioxide (SiO 2 ) intermediate layer between superparamagnetic iron oxide (SPIO) and MnO 2 . Through the “dual-contrast enhanced subtraction” imaging processing technique, the contrast sensitivity of this MRI contrast agent is enhanced to a 12.3-time difference between diseased and normal tissue. Consequently, SPIO@SiO 2 @MnO 2 is successfully applied to trace the tiny liver metastases of approximately 0.5 mm and monitor tissue inflammation.
研究领域:
医学影像
·
癌症研究
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2020
·
IF 0.936
Feng-Zhi CUI,Jian-Hua LIU,Yang LIU,Bi-Ying YUAN,Xue GONG,Qing-Hai YUAN,Ting-Ting GONG,Lei WANG
Molecular imaging (MI) techniques have extremely significant effect on the diagnosis and prognosis of diseases, such as gastrointestinal (GI) tract-related diseases. Furthermore, nanomaterials as contrast agents have attracted a great deal of research attention, due to their rational fabrication and biomedical. Herein, we reported a facile process to synthesis PEGylated BaGdF 5 nanoparticles via a one-pot solvothermal route as CT/MRI dual-modal contrast agents for in vivo imaging of GI tract. Compared to the commercially used iodine contrast agents, the well-prepared nanoparticles exhibited enhancement in computed tomography (CT) imaging. In the presence of Gd, nanoparticles could also be used in magnetic resonance imaging (MRI). PEGylated BaGdF 5 nanoparticles were characterized by transmission electron microscopy (TEM), X-ray powder diffraction analysis (XRD), Fourier transform infrared (FT-IR) spectroscopy and thermogravimetric analysis (TGA). Besides, MTT assay revealed that the prepared nanoparticles proved to be low toxicity and high biocompatibility for Hela cells. Hemolytic assay illustrated nanoparticles possess favorable hemocompatibility. H & E (Hematoxylin and Eosin) histological staining assessed long-term toxicity of oral PEGylated BaGdF 5 nanoparticles, and the results showed that the nanoparticles had overall safety for GI tissue with comparatively high compatibility. Based on above results, PEGylated BaGdF 5 nanoparticles were admired multi-functional contrast agents to apply in CT and MRI imaging with prominent prospects.
研究领域:
医学影像学
·
纳米医学
·
分子影像
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）