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Fluorescence imaging in tumor mice

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https://www.readbyqxmd.com/read/28437441/fluorescence-imaging-topography-scanning-system-for-intraoperative-multimodal-imaging
#1
Tri T Quang, Hye-Yeong Kim, Forrest Sheng Bao, Francis A Papay, W Barry Edwards, Yang Liu
Fluorescence imaging is a powerful technique with diverse applications in intraoperative settings. Visualization of three dimensional (3D) structures and depth assessment of lesions, however, are oftentimes limited in planar fluorescence imaging systems. In this study, a novel Fluorescence Imaging Topography Scanning (FITS) system has been developed, which offers color reflectance imaging, fluorescence imaging and surface topography scanning capabilities. The system is compact and portable, and thus suitable for deployment in the operating room without disturbing the surgical flow...
2017: PloS One
https://www.readbyqxmd.com/read/28435471/nucleolin-targeted-extracellular-vesicles-as-a-versatile-platform-for-biologics-delivery-to-breast-cancer
#2
Yayu Wang, Xiaojia Chen, Baoqing Tian, Jiafan Liu, Li Yang, Lilan Zeng, Tianfen Chen, An Hong, Xiaogang Wang
Small interfering RNAs (siRNA)/microRNAs (miRNA) have promising therapeutic potential, yet their clinical application has been hampered by the lack of appropriate delivery systems. Herein, we employed extracellular vesicles (EVs) as a targeted delivery system for small RNAs. EVs are cell-derived small vesicles that participate in cell-to-cell communication for protein and RNA delivery. We used the aptamer AS1411-modified EVs for targeted delivery of siRNA/microRNA to breast cancer tissues. Tumor targeting was facilitated via AS1411 binding to nucleolin, which is highly expressed on the surface membrane of breast cancer cells...
2017: Theranostics
https://www.readbyqxmd.com/read/28426929/exerting-enhanced-permeability-and-retention-effect-driven-delivery-by-ultrafine-iron-oxide-nanoparticles-with-t1-t2-switchable-magnetic-resonance-imaging-contrast
#3
Liya Wang, Jing Huang, Hongbo Chen, Hui Wu, Yaolin Xu, Yuancheng Li, Hong Yi, Yongqiang Andrew Wang, Lily Yang, Hui Mao
The poor delivery efficiency remains a major challenge in nanomaterial based tumor targeted imaging and drug delivery. This work demonstrated a strategy to improve nanoparticle delivery and intratumoral distribution using a sub-5 nm (3.5 nm core size) ultrafine iron oxide nanoparticles (uIONPs) that can easily extravasate from the tumor vasculature and readily diffuse into the tumor tissue compared to iron oxide nanoparticles (IONP) with larger sizes, followed by self-assembling in the acidic tumor interstitial space to limit their re-entering the circulation...
April 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/28426279/combination-of-gemcitabine-and-docetaxel-regress-both-gastric-leiomyosarcoma-proliferation-and-invasion-in-an-imageable-patient-derived-orthotopic-xenograft-ipdox-model
#4
Kei Kawaguchi, Kentaro Igarashi, Takashi Murakami, Tasuku Kiyuna, Scott D Nelson, Sarah M Dry, Yunfeng Li, Tara A Russell, Arun S Singh, Bartosz Chmielowski, Michiaki Unno, Fritz C Eilber, Robert M Hoffman
Gastric leiomyosarcoma is a recalcitrant cancer and chemotherapy strategy is controversial. The present study used a patient-derived orthotopic xenograft (PDOX) nude mouse model of gastric leiomyosarcoma to identify an effective therapeutic regimen in order to develop individualized precision medicine for this disease. A gastric leiomyosarcoma obtained from a patient was first grown in transgenic nude mice ubiquitously expressing red fluorescent protein (RFP) in order to stably label the tumor stroma. The RFP-expressing tumor was then passaged orthotopically in the gastric wall of non-transgenic nude mice to establish an imageable PDOX (iPDOX) model...
April 20, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28423693/enhanced-anti-tumor-therapeutic-efficacy-of-dna-vaccine-by-fusing-the-e7-gene-to-baff-in-treating-human-papillomavirus-associated-cancer
#5
Chao-Chih Wu, Fang-Cih Wu, Yun-Tin Hsu, Yu-Chia Hsiao, Yuh-Cheng Yang, C Allen Chang, Chih-Long Chang
B-cell-activating factor (BAFF) belongs to the tumor necrosis factor family that not only stimulates B and T cells but also counteracts immune tolerance. BAFF is also a type II membrane protein, which is secreted through the endoplasmic reticulum (ER)-Golgi apparatus pathway. Fusing an antigen to BAFF might enhance the presentation of major histocompatibility complex class I molecules. These characteristics represent an opportunity to enhance the antitumor effects of DNA vaccines. Therefore, we fused BAFF to human papillomavirus type 16 E7 as a DNA vaccine and evaluated its antitumor effects...
March 9, 2017: Oncotarget
https://www.readbyqxmd.com/read/28419513/genetic-recombination-between-stromal-and-cancer-cells-results-in-highly-malignant-cells-identified-by-color-coded-imaging-in-a-mouse-lymphoma-model
#6
Miki Nakamura, Atsushi Suetsugu, Kousuke Hasegawa, Takuro Matsumoto, Hitomi Aoki, Takahiro Kunisada, Masahito Shimizu, Shigetoyo Saji, Hisataka Moriwaki, Robert M Hoffman
The tumor microenvironment (TME) promotes tumor growth and metastasis. We previously established the color-coded EL4 lymphoma model with red fluorescent protein expressing EL4 implanted in transgenic C57BL/6 green fluorescent protein (GFP) mice. Color-coded imaging of the lymphoma tumor suggested an important role of stromal cells in lymphoma progression and metastasis. In the present study, we used color-coded imaging of RFP-lymphoma cells and GFP stromal cells to identify yellow-fluorescent recombinant cells appearing only during metastasis...
April 17, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28416744/real-time-near-infrared-fluorescence-imaging-using-crgd-zw800-1-for-intraoperative-visualization-of-multiple-cancer-types
#7
Henricus J M Handgraaf, Martin C Boonstra, Hendrica A J M Prevoo, Joeri Kuil, Mark W Bordo, Leonora S F Boogerd, Babs G Sibinga Mulder, Cornelis F M Sier, Maaike L Vinkenburg-van Slooten, A Rob P M Valentijn, Jacobus Burggraaf, Cornelis J H van de Velde, John V Frangioni, Alexander L Vahrmeijer
Incomplete resections and damage to critical structures increase morbidity and mortality of patients with cancer. Targeted intraoperative fluorescence imaging aids surgeons by providing real-time visualization of tumors and vital structures. This study evaluated the tumor-targeted zwitterionic near-infrared fluorescent peptide cRGD-ZW800-1 as tracer for intraoperative imaging of multiple cancer types. cRGD-ZW800-1 was validated in vitro on glioblastoma (U-87 MG) and colorectal (HT-29) cell lines. Subsequently, the tracer was tested in orthotopic mouse models with HT-29, breast (MCF-7), pancreatic (BxPC-3), and oral (OSC-19) tumors...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28411450/activatable-near-infrared-dye-conjugated-hyaluronic-acid-based-nanoparticles-as-a-targeted-theranostic-agent-for-enhanced-fluorescence-ct-photoacoustic-imaging-guided-photothermal-therapy
#8
Xiaolong Liang, Lei Fang, Xiaoda Li, Xu Zhang, Fan Wang
Targeted theranostic nano-system integrating functions of both diagnosis and therapy shows great potential for improving diagnosis and therapeutic efficacy. Herein, multifunctional nanoparticle based on activatable hyaluronic acid (HA) conjugating two near-infrared (NIR) dyes of Cy5.5 and IR825 was successfully designed and fabricated, and simultaneously used as a carrier for encapsulating perfluorooctylbromide (PFOB). In this system, PFOB showed good capability to absorb the X-rays, Cy5.5 on the outer surface acted as a fluorescent dye activatable by hyaluronidases (Hyals) in the tumor, and IR825 in the core as a photothermal agent...
July 2017: Biomaterials
https://www.readbyqxmd.com/read/28408212/application-of-molecular-imaging-technology-in-evaluating-the-inhibiting-effect-of-apigenin-in%C3%A2-vivo-on-subcutaneous-hepatocellular-carcinoma
#9
Gang Li, Chong-Wei Chi, Xian-Fang Shao, Chi-Hua Fang
The aim of this study was to evaluate the inhibiting effect of apigenin on liver cancer in vivo based on the optical molecular imaging method. Subcutaneous liver tumor models were established using respective 1 × 10(6) firefly luciferase (fLuc) and green fluorescent protein (GFP) labeled human hepatocellular carcinoma cells (HepG2-fLuc and HepG2-GFP cells) in 20 BALB/c nude mice which were randomly divided into two groups, 10 in each group. After the tumor cells were implanted 15 days, apigenin was administered through intraperitoneal injection in group B, the other ten mice as control group A...
May 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28403743/nonclinical-profile-of-blz-100-a-tumor-targeting-fluorescent-imaging-agent
#10
Julia Parrish-Novak, Kelly Byrnes-Blake, Narine Lalayeva, Stefanie Burleson, Janean Fidel, Rhonda Gilmore, Pamela Gayheart-Walsten, Gregory A Bricker, William J Crumb, K S Tarlo, Stacey Hansen, Valorie Wiss, Errol Malta, William S Dernell, James M Olson, Dennis M Miller
BLZ-100 is a single intravenous use, fluorescent imaging agent that labels tumor tissue to enable more complete and precise surgical resection. It is composed of a chlorotoxin peptide covalently bound to the near-infrared fluorophore indocyanine green. BLZ-100 is in clinical development for intraoperative visualization of human tumors. The nonclinical safety and pharmacokinetic (PK) profile of BLZ-100 was evaluated in mice, rats, canines, and nonhuman primates (NHP). Single bolus intravenous administration of BLZ-100 was well tolerated, and no adverse changes were observed in cardiovascular safety pharmacology, PK, and toxicology studies in rats and NHP...
March 2017: International Journal of Toxicology
https://www.readbyqxmd.com/read/28402587/methotraxate-loaded-hybrid-nanoconstructs-target-vascular-lesions-and-inhibit-atherosclerosis-progression-in-apoe-mice
#11
Cinzia Stigliano, Maricela R Ramirez, Jaykrishna V Singh, Santosh Aryal, Jaehong Key, Elvin Blanco, Paolo Decuzzi
Atherosclerosis is an inflammatory disorder characterized by the progressive thickening of blood vessel walls eventually resulting in acute vascular syndromes. Here, intravenously injectable hybrid nanoconstructs are synthesized for tempering immune cell inflammation locally and systemically. Lipid and polymer chains are nanoprecipitated to form 100 nm spherical polymeric nanoconstructs (SPNs), loaded with methotrexate (MTX) and subsequently labeled with Cu(64) and fluorescent probes for combined nuclear/optical imaging...
April 12, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28396280/high-oral-bioavailability-of-2-methoxyestradiol-in-peg-plga-micelles-microspheres-for-cancer-therapy
#12
XinHong Guo, CaiPing Chen, Xin Liu, PanPan Hou, XiaoNan Guo, Fang Ding, ZhiHao Wang, YuRong Hu, Zhi Li, ZhenZhong Zhang
The development of effective oral preparations of 2-methoxyestradiol (2-ME) has been a worldwide problem. In this study, breakthrough progress has been made in oral delivery of 2-ME by encapsulating 2-ME micelles in pH-responsive microspheres. 2-ME micelles with small particle size (58 nm) and high drug loading (7.94±0.23%) were successfully prepared and showed slower release characteristics and 12.8 times higher cytotoxicity on 4T1 cells than free 2-ME. The pH-sensitive microspheres could slowly release 82% of 2-ME micelles for 10 h in PBS (7...
April 7, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28385630/targetability-of-hyaluronic-acid-nanogel-to-cancer-cells-in-vitro-and-in-vivo-studies
#13
S S Pedrosa, P Pereira, A Correia, F M Gama
We have, in previous work developed, characterized and evaluated the biocompatibility of an engineered hyaluronic acid nanogel. Here we assess the targetability of a hyaluronic acid nanogel towards CD44 overexpressing cells, in vitro and in vivo. Results obtained by flow cytometry and confocal fluorescence microscopy shows that nanogel is greatly internalized by non-small cancer lung cells (A549 cells), that overexpress CD44 receptors. The biodistribution and tumor targetability of the nanogel labelled with a near-infrared (NIR) probe were performed, in mice, through a non-invasive imaging system...
April 4, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28383175/color-convertible-unimolecular-micelle-based-activatable-fluorescent-probe-for-tumor-specific-detection-and-imaging-in-vitro-and-in-vivo
#14
Yu Huang, Feng Qiu, Dong Chen, Lingyue Shen, Shuting Xu, Dongbo Guo, Yue Su, Deyue Yan, Xinyuan Zhu
Recent years have witnessed significant progress in molecular probes for cancer diagnosis. However, the conventional molecular probes are designed to be "always-on" by attachment of tumor-targeting ligands, which limits their abilities to diagnose tumors universally due to the variations of targeting efficiency and complex environment in different cancers. Here, it is proposed that a color-convertible, activatable probe is responding to a universal tumor microenvironment for tumor-specific diagnosis without targeting ligands...
April 6, 2017: Small
https://www.readbyqxmd.com/read/28374909/doxorubicin-loaded-chitosan-w18-o49-hybrid-nanoparticles-for-combined-photothermal-chemotherapy
#15
Shanmei Yuan, Jisong Hua, Yinyin Zhou, Yin Ding, Yong Hu
Combined treatment is more effective than single treatment against most forms of cancer. In this work, doxorubicin loaded chitosan-W18 O49 nanoparticles combined with the photothermal therapy and chemotherapy are fabricated through the electrostatic interaction between positively charged chitosan and negatively charged W18 O49 nanoparticles. The in vitro and in vivo behaviors of these nanoparticles are examined by dynamic light scattering, transmission electron microscopy, cytotoxicity, near-infrared fluorescence imaging, and tumor growth inhibition experiment...
April 4, 2017: Macromolecular Bioscience
https://www.readbyqxmd.com/read/28373669/garcinol-loaded-vitamin-e-tpgs-emulsified-plga-nanoparticles-preparation-physicochemical-characterization-in-vitro-and-in-vivo-studies
#16
Raghuvir H Gaonkar, Soumya Ganguly, Saikat Dewanjee, Samarendu Sinha, Amit Gupta, Shantanu Ganguly, Dipankar Chattopadhyay, Mita Chatterjee Debnath
Garcinol (GAR) is a naturally occurring polyisoprenylated phenolic compound. It has been recently investigated for its biological activities such as antioxidant, anti-inflammatory, anti ulcer, and antiproliferative effect on a wide range of human cancer cell lines. Though the outcomes are very promising, its extreme insolubility in water remains the main obstacle for its clinical application. Herein we report the formulation of GAR entrapped PLGA nanoparticles by nanoprecipitation method using vitamin E TPGS as an emulsifier...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28373086/optical-imaging-and-anticancer-chemotherapy-through-carbon-dot-created-hollow-mesoporous-silica-nanoparticles
#17
Min Sil Kang, Rajendra K Singh, Tae-Hyun Kim, Joong-Hyun Kim, Kapil D Patel, Hae-Won Kim
Multifunctional nanocarrier-based theranostics is currently considered to solve some key unmet challenges in cancer treatment. Here we report a nanocarrier platform, named carbon dot (CD) created mesoporous hollow organosilica (C-hMOS) nanoparticles, to deliver anticancer drug and to enable optical imaging. The hollow structure was formed by the removal of a nanorod core template, and at the same time, the fluorescent signal was endowed from the heat-treated organosilica network. Thanks to the hollow and mesoporous structure, the C-hMOS effectively loaded doxorubicin (DOX) for cancer chemotherapy...
March 31, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28356936/danshensu-a-major-water-soluble-component-of-salvia-miltiorrhiza-enhances-the-radioresponse-for-lewis-lung-carcinoma-xenografts-in-mice
#18
Hong-Ying Cao, Rui-Lin Ding, Meng Li, Mao-Nan Yang, Ling-Lin Yang, Jing-Bo Wu, Bo Yang, Jing Wang, Cui-Lian Luo, Qing-Lian Wen
The molecule 3-(3,4-dihydroxyphenyl)-2-hydroxypropanoic acid (danshensu), a herbal preparation used in traditional Chinese medicine, has been found to possess potential antitumor and anti-angiogenesis effects. The aim of the present study was to investigate the efficacy of the combination of radiation therapy (RT) with danshensu in the treatment of Lewis lung carcinoma (LLC) xenografts, whilst exploring and evaluating the mechanism involved. In total, 8-week old female C57BL/6J mice were randomly assigned into 3 groups to receive: RT, RT + cisplatin and RT + danshensu, respectively, when LLC reached 100-150 mm(3)...
February 2017: Oncology Letters
https://www.readbyqxmd.com/read/28350351/assembly-of-iron-oxide-nanocubes-for-enhanced-cancer-hyperthermia-and-magnetic-resonance-imaging
#19
Minjung Cho, Antonio Cervadoro, Maricela R Ramirez, Cinzia Stigliano, Audrius Brazdeikis, Vicki L Colvin, Pierluigi Civera, Jaehong Key, Paolo Decuzzi
Multiple formulations of iron oxide nanoparticles (IONPs) have been proposed for enhancing contrast in magnetic resonance imaging (MRI) and for increasing efficacy in thermal ablation therapies. However, insufficient accumulation at the disease site and low magnetic performance hamper the clinical application of IONPs. Here, 20 nm iron oxide nanocubes were assembled into larger nanoconstructs externally stabilized by a serum albumin coating. The resulting assemblies of nanocubes (ANCs) had an average diameter of 100 nm and exhibited transverse relaxivity (r₂ = 678...
March 28, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28347861/activatable-bispecific-liposomes-bearing-fibroblast-activation-protein-directed-single-chain-fragment-trastuzumab-deliver-encapsulated-cargo-into-the-nuclei-of-tumor-cells-and-the-tumor-microenvironment-simultaneously
#20
Felista L Tansi, Ronny Rüger, Claudia Böhm, Frank Steiniger, Roland E Kontermann, Ulf K Teichgraeber, Alfred Fahr, Ingrid Hilger
Molecular targeting plays a significant role in cancer diagnosis and therapy. However, the heterogeneity of tumors is a limiting obstacle for molecular targeting. Consequently, clinically approved drug delivery systems such as liposomes still rely on passive targeting to tumors, which does not address tumor heterogeneity. In this work, we therefore designed and elucidated the potentials of activatable bispecific targeted liposomes for simultaneous detection of fibroblast activation protein (FAP) and the human epidermal growth factor receptor 2 (HER2)...
March 24, 2017: Acta Biomaterialia
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