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Fluorescence imaging in tumor mice

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https://www.readbyqxmd.com/read/28917835/antitumor-activity-pharmacokinetics-tumor-homing-effect-and-hepatotoxicity-of-a-species-cross-reactive-c-met-antibody
#1
Hyunkyu Park, Donggeon Kim, Eunju Son, Sunhwa Shin, Jason K Sa, Seok-Hyung Kim, Yeup Yoon, Do-Hyun Nam
The receptor tyrosine kinase c-Met plays critical roles in promoting tumor growth, invasion, metastasis, and angiogenesis in various types of cancer and is a promising therapeutic target. The development of a species cross-reactive therapeutic antibody could provide useful to comprehensive preclinical assessment in animal models. Towards this goal, we developed human/mouse cross-reactive c-Met antibodies using an antibody phage library. IRCR201, a c-Met antibody with species cross-reactivity, successfully inhibited the HGF/c-Met signaling pathway via degradation of c-Met and disruption of the binding with its partners, and demonstrated strong in vivo antitumor activity...
September 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28916105/selective-imaging-of-cancer-cells-with-a-ph-activatable-lysosome-targeting-fluorescent-probe
#2
Rongguang Shi, Lu Huang, Xiaoxue Duan, Guohao Sun, Gui Yin, Ruiyong Wang, Jun-Jie Zhu
Fluorescence imaging with tumor-specific fluorescent probe has emerged as a tool to aid surgeons in the identification and removal of tumor tissue. We report here a new lysosome-targeting fluorescent probe (NBOH) with BODIPY fluorephore to distinguish tumor tissue out of normal tissue based on different pH environment. The probe exhibited remarkable pH-dependent fluorescence behavior in a wide pH range from 3.0 to 11.0, especially a sensitive pH-dependent fluorescence change at pH range between 3.5 and 5.5, corresponding well to the acidic microenvironment of tumor cells, in aqueous solution...
October 2, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28915639/heptamethine-carbocyanine-dz-1-dye-for-near-infrared-fluorescence-imaging-of-hepatocellular-carcinoma
#3
Jiaze An, Ningning Zhao, Caiqin Zhang, Yong Zhao, Dengxu Tan, Ya Zhao, Bing Bai, Hai Zhang, Boyang Jason Wu, Changhong Shi
Near-infrared fluorescence (NIRF) dyes have recently emerged as promising tools for non-invasive imaging of different types of cancers. Here, we explored the potential utility of a NIRF DZ-1 dye, with dual imaging and tumour targeting functions, in hepatocellular carcinoma (HCC). We showed the preferential uptake of DZ-1 by HCC cells in vitro and in derived subcutaneous/orthotopic tumour xenografts, accompanied by a minimal effect on normal cells. DZ-1 simplified tumour growth profiling as well, since we were able to correlate NIRF signals with tumour volume and/or tumour-emitting luminescence in mice...
August 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28913948/synthesis-of-size-tunable-hollow-polypyrrole-nanostructures-and-their-assembly-into-folate-targeting-and-ph-responsive-anti-cancer-drug-delivery
#4
Jian Chen, Xiufang Li, Yanhua Sun, Yuwei Hu, Yulong Peng, Yimin Li, Gang Yin, Hui Liu, Jiangfeng Xu, Shian Zhong
Chemotherapeutic drugs currently used in clinical settings have a high toxicity, low specificity, and short half-life. Herein, polypyrrole (PPy)-based anticancer drug nanocapsules were prepared by tailoring the nanoparticle size with a template method, controlling drug release by aromatic imine, increasing nanoparticle stability through PEGylation, and improving tumor cell selectivity via folate (FA) mediation. Nanoparticles were characterized by transmission electron microscopy (TEM) and dynamic light scattering (DLS)...
September 15, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28912146/cerenkov-activated-sticky-tag-for-in-vivo-fluorescence-imaging
#5
Sudeep Das, Katja Haedicke, Jan Grimm
A big challenge for the clinical utilization of Cerenkov luminescence (CL) imaging is its low signal intensity, which is several orders of magnitude below ambient light. Consequently, highly sensitive cameras, sufficient shielding from background light and long acquisition times are required. To alleviate this problem, we hypothesize a strategy to convert the weak CL signal into a stronger fluorescence signal by using CL-activated formation of nitrenes from azides to locally fix a fluorescent probe in tissue by the formation of a covalent bond...
September 14, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28912139/a-combination-rnai-chemotherapy-layer-by-layer-nanoparticle-for-systemic-targeting-of-kras-p53-with-cisplatin-to-treat-non-small-cell-lung-cancer
#6
Li Gu, Jason Z Deng, Sweta Roy, Paula T Hammond
PURPOSE: Mutation of the Kirsten ras sarcoma viral oncogene homolog (KRAS) and loss of p53 function are commonly seen in non-small cell lung cancer (NSCLC). Combining therapeutics targeting these tumor defensive pathways with cisplatin in a single nanoparticle platform are rarely developed in clinic. EXPERIMENTAL DESIGN: Cisplatin was encapsulated in liposomes which multiple polyelectrolyte layers including siKRAS and miR-34a were built on to generate multifunctional layer-by-layer nanoparticle...
September 14, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28884622/ex-vivo-and-in-vivo-noninvasive-imaging-of-epidermal-growth-factor-receptor-inhibition-on-colon-tumorigenesis-using-activatable-near-infrared-fluorescent-probes
#7
Shengli Ding, Randall E Blue, Emily Moorefield, Hong Yuan, Pauline K Lund
BACKGROUND: Near-infrared fluorescence (NIRF) imaging combined with enzyme-activatable NIRF probes has yielded promising results in cancer detection. OBJECTIVE: To test whether 3-dimensional (3-D) noninvasive in vivo NIRF imaging can detect effects of epidermal growth factor receptor (EGFR) inhibitor on both polypoid and flat tumor load in azoxymethane (AOM)-induced colon tumors or tumors in Apc(Min/+) mice. METHODS: The AOM-injected KK-HIJ mice received EGFR inhibitor diet or chow diet...
January 2017: Molecular Imaging
https://www.readbyqxmd.com/read/28875691/construction-and-evaluation-of-a-targeted-hyaluronic-acid-nanoparticle-photosensitizer-complex-for-cancer-photodynamic-therapy
#8
Shi Gao, Jingjing Wang, Rui Tian, Guohao Wang, Liwen Zhang, Yesen Li, Lu Li, Qingjie Ma, Lei Zhu
Photodynamic therapy (PDT) is a novel treatment modality that is under intensive preclinical investigations for a variety of diseases, including cancer. Despite extensive studies in this area, selective and effective photodynamic agents that can specifically accumulate in tumors to reach a therapeutic concentration are limited. Although recent attempts have produced photosensitizers (PSs) complexed with various nanomaterials, the tedious preparation steps and poor tumor efficiency of therapy hamper their utilization...
September 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28875472/evaluation-of-novel-64-cu-labeled-theranostic-gadolinium-based-nanoprobes-in-hepg2-tumor-bearing-nude-mice
#9
Pengcheng Hu, Dengfeng Cheng, Tao Huang, Anna B Banizs, Jie Xiao, Guobing Liu, Quan Chen, Yuenan Wang, Jiang He, Hongcheng Shi
Radiation therapy of liver cancer is limited by low tolerance of the liver to radiation. Radiosensitizers can effectively reduce the required radiation dose. AGuIX nanoparticles are small, multifunctional gadolinium-based nanoparticles that can carry radioisotopes or fluorescent markers for single-photon emission computed tomography (SPECT), positron emission tomography (PET), fluorescence imaging, and even multimodality imaging. In addition, due to the high atomic number of gadolinium, it can also serve as a tumor radiation sensitizer...
September 6, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28874076/multimodal-fluorescence-and-bioluminescence-imaging-reveals-transfection-potential-of-intratracheally-administered-polyplexes-for-breast-cancer-lung-metastases
#10
Antonia Geyer, Alexander Taschauer, Fatih Alioglu, Martina Anton, Julia Maier, Elisabeth Drothler, Manuela Simlinger, Sümeyye Yavuz, Haider Sami, Manfred Ogris
Local delivery of anticancer agents or gene therapeutics to lung tumors can circumvent side effects or accumulation in non-target organs, but accessibility via the alveolar side of blood-air barrier remains challenging. Polyplexes based on plasmid and linear polyethylenimine (LPEI) transfect healthy lung tissue when applied intravenously in the mouse, but direct delivery into the lungs results in low transfection of lung tissue. Nevertheless, LPEI could offer the potential to selectively transfect lung tumors, if accessible by the alveolar side...
September 6, 2017: Human Gene Therapy
https://www.readbyqxmd.com/read/28872058/nanoparticles-target-early-stage-breast-cancer-metastasis-in-vivo
#11
Evgeniya Goldman, Assaf Zinger, Dana da Silva, Zvi Yaari, Ashima Kajal, Dikla Vardi-Oknin, Mor Goldfeder, Josh Schroeder, Janna Shainsky Roitman, Dov Hershkovitz, Avi Schroeder
Despite advances in cancer therapy, treating cancer after it has metastasized remains an unmet clinical challenge. In this study we demonstrate that 100-nm liposomes target triple-negative murine breast-cancer metastases post intravenous administration. Metastatic breast cancer was induced in BALB/c-mice either experimentally, by a tail vein injection of 4T1 cells, or spontaneously, after implanting a primary tumor xenograft. To track their biodistribution in vivo the liposomes were labeled with multi-modal diagnostic agents, including indocyanine green and rhodamine for whole-animal fluorescent imaging, gadolinium for magnetic resonance imaging, and europium for a quantitative biodistribution analysis...
September 5, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28871484/epr-oximetry-sensor-developing-a-tam-derivative-for-in-vivo-studies
#12
Agnieszka Boś-Liedke, Magdalena Walawender, Anna Woźniak, Dorota Flak, Jacek Gapiński, Stefan Jurga, Małgorzata Kucińska, Adam Plewiński, Marek Murias, Marwa Elewa, Lisa Lampp, Peter Imming, Krzysztof Tadyszak
Oxygenation is one of the most important physiological parameters of biological systems. Low oxygen concentration (hypoxia) is associated with various pathophysiological processes in different organs. Hypoxia is of special importance in tumor therapy, causing poor response to treatment. Triaryl methyl (TAM) derivative radicals are commonly used in electron paramagnetic resonance (EPR) as sensors for quantitative spatial tissue oxygen mapping. They are also known as magnetic resonance imaging (MRI) contrast agents and fluorescence imaging compounds...
September 4, 2017: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28859104/near-infrared-fluorescence-imaging-and-photodynamic-therapy-with-indocyanine-green-lactosome-has-antineoplastic-effects-for-hepatocellular-carcinoma
#13
Takumi Tsuda, Masaki Kaibori, Hidehiko Hishikawa, Richi Nakatake, Tadayoshi Okumura, Eiichi Ozeki, Isao Hara, Yuji Morimoto, Kengo Yoshii, Masanori Kon
BACKGROUND: Anticancer agents and operating procedures have been developed for hepatocellular carcinoma (HCC) patients, but their prognosis remains poor. It is necessary to develop novel diagnostic and therapeutic strategies for HCC to improve its prognosis. Lactosome is a core-shell-type polymeric micelle, and enclosing labeling or anticancer agents into this micelle enables drug delivery. In this study, we investigated the diagnostic and therapeutic efficacies of indocyanine green (ICG)-loaded lactosome for near-infrared fluorescence (NIF) imaging and photodynamic therapy (PDT) for HCC...
2017: PloS One
https://www.readbyqxmd.com/read/28843831/immunopet-imaging-of-tissue-factor-expression-in-pancreatic-cancer-with-89-zr-df-alt-836
#14
Reinier Hernandez, Christopher G England, Yunan Yang, Hector F Valdovinos, Bai Liu, Hing C Wong, Todd E Barnhart, Weibo Cai
Overexpression of tissue factor (TF) has been associated with increased tumor growth, tumor angiogenesis, and metastatic potential in many malignancies, including pancreatic cancer. Additionally, high TF expression was shown to strongly correlate with poor prognoses and decreased survival in pancreatic cancer patients. Herein, we exploited the potential targeting of TF for positron emission tomography (PET) imaging of pancreatic cancer. The TF-targeted tracer was developed through radiolabeling of the anti-human TF monoclonal antibody (ALT-836) with (89)Zr...
August 24, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28842588/cancer-targeted-nucleic-acid-delivery-and-quantum-dot-imaging-using-egf-receptor-aptamer-conjugated-lipid-nanoparticles
#15
Min Woo Kim, Hwa Yeon Jeong, Seong Jae Kang, Moon Jung Choi, Young Myoung You, Chan Su Im, Tae Sup Lee, In Ho Song, Chang Gun Lee, Ki-Jong Rhee, Yeon Kyung Lee, Yong Serk Park
Co-application of fluorescent quantum dot nanocrystals and therapeutics has recently become a promising theranostic methodology for cancer treatment. We developed a tumor-targeted lipid nanocarrier that demonstrates notable efficacy in gene delivery as well as tumor bio-imaging. Coupling of aptamer molecules against the EGF receptor (EGFR) to the distal termini of lipid nanoparticles provided the carrier with tumor-specific recognition capability. The cationic lipid component, referred to as O,O'-dimyristyl-N-lysyl glutamate (DMKE), was able to effectively complex with anionic small-interfering RNA (siRNA)...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28842335/concurrently-suppressing-multidrug-resistance-and-metastasis-of-breast-cancer-by-co-delivery-of-paclitaxel-and-honokiol-with-ph-sensitive-polymeric-micelles
#16
Ziqi Wang, Xinru Li, Dishi Wang, Yang Zou, Xiaoyou Qu, Chuyu He, Yunqiang Deng, Yao Jin, Yuanhang Zhou, Yanxia Zhou, Yan Liu
To concurrently suppress multidrug resistance (MDR) and metastasis of breast cancer cells, paclitaxel (PTX) and honokiol (HNK) were coencapsulated into pH-sensitive polymeric micelles based on poly(2-ethyl-2-oxazoline)-poly(D, L-lactide) (PEOz-PLA). The physicochemical properties of dual drug-loaded PEOz-PLA micelles were characterized in size, drug loading and in vitro release. The efficiency of MDR reversal for the micelles was testified by synergetic enhancement of cytotoxicity and uptake by MCF-7/ADR cells...
August 22, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28842011/in-vivo-imaging-of-alkaline-phosphatase-in-tumor-bearing-mouse-model-by-a-promising-near-infrared-fluorescent-probe
#17
Hong-Wen Liu, Xiao-Xiao Hu, Longmin Zhu, Ke Li, Qiming Rong, Lin Yuan, Xiao-Bing Zhang, Weihong Tan
Alkaline phosphatase (ALP), one of the important hydrolases, is associated with the progress of many diseases as a well-defined biomarker. Fluorescence imaging of ALP in living organisms is of great importance for biological studies. However, in vivo detection of ALP remains a great challenge because current fluorescent probes show short excitation and emission wavelength, which are not desired for in vivo fluorescence imaging. Herein we reported a near-infrared (NIR) fluorescent probe (NALP) for turn-on trapping of ALP activity in living cancer cells and tumors...
December 1, 2017: Talanta
https://www.readbyqxmd.com/read/28835099/glutathione-sensitive-hyaluronic-acid-mercaptopurine-prodrug-linked-via-carbonyl-vinyl-sulfide-a-robust-and-cd44-targeted-nanomedicine-for-leukemia
#18
Jie Qiu, Ru Cheng, Jian Zhang, Huanli Sun, Chao Deng, Fenghua Meng, Zhiyuan Zhong
6-Mercaptopurine (6-MP) is an essential medicine used for treating leukemia in the clinics. 6-MP suffers, however, from poor water solubility, low bioavailability, and significant side effects. Here, we designed CD44-targeted glutathione-sensitive hyaluronic acid-mercaptopurine prodrug (HA-GS-MP) linked via carbonyl vinyl sulfide for safer and enhanced treatment of acute myeloid leukemia (AML). HA-GS-MP obtained with 50 kDa HA and 6-MP conjugation content of 6.9 wt % showed excellent water solubility with a hydrodynamic size of ca...
September 1, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28826214/improved-intraoperative-detection-of-ovarian-cancer-by-folate-receptor-alpha-targeted-dual-modality-imaging
#19
Marlène C H Hekman, Otto C Boerman, Desirée L Bos, Leon F A G Massuger, Susan Weil, Luigi Grasso, Katherine A Rybinski, Egbert Oosterwijk, Peter F A Mulders, Mark Rijpkema
Complete resection of tumor lesions in advanced stage ovarian cancer patients is of utmost importance, since the extent of residual disease after surgery strongly affects survival. Intraoperative imaging may be useful to improve surgery in these patients. Farletuzumab is a humanized IgG1 antibody that specifically recognizes the folate receptor alpha (FRα). Labeled with a radiolabel and a fluorescent dye, farletuzumab may be used for the intraoperative detection of ovarian cancer lesions. The current aim is to demonstrate the feasibility of FRα-targeted dual-modality imaging using (111)In-farletuzumab-IRDye800CW in an intraperitoneal ovarian cancer model...
August 30, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28800445/enzyme-sensitive-gemcitabine-conjugated-albumin-nanoparticles-as-a-versatile-theranostic-nanoplatform-for-pancreatic-cancer-treatment
#20
Haijie Han, Jinhui Wang, Tingting Chen, Lichen Yin, Qiao Jin, Jian Ji
Development of gemcitabine (GEM) nanocarriers as theranostic agents for pancreatic cancer chemotherapy has received extensive attention in recent years. A novel enzyme-sensitive albumin-based GEM delivery nanoplatform was developed in this research by simple conjugation of GEM to human serum albumin (HSA) via cathepsin B cleavable peptide GFLG and then complexing with near-infrared (NIR) dye IR780, forming a HSA-GEM/IR780 complex. The successful preparation of HSA-GEM/IR780 complex was confirmed by Matrix-Assisted Laser Desorption/Ionization Time of Flight Mass Spectrometry (MALDI-TOF-MS), UV-vis-NIR absorption spectra and fluorescent emission spectra...
July 17, 2017: Journal of Colloid and Interface Science
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