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Fluorescence imaging in tumor mice

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https://www.readbyqxmd.com/read/28800445/enzyme-sensitive-gemcitabine-conjugated-albumin-nanoparticles-as-a-versatile-theranostic-nanoplatform-for-pancreatic-cancer-treatment
#1
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
https://www.readbyqxmd.com/read/28794625/paclitaxel-loaded-and-a10-3-2-aptamer-targeted-poly-lactide-co-glycolic-acid-nanobubbles-for-ultrasound-imaging-and-therapy-of-prostate-cancer
#2
Meng Wu, Ying Wang, Yiru Wang, Mingbo Zhang, Yukun Luo, Jie Tang, Zhigang Wang, Dong Wang, Lan Hao, Zhibiao Wang
In the current study, we synthesized prostate cancer-targeting poly(lactide-co-glycolic acid) (PLGA) nanobubbles (NBs) modified using A10-3.2 aptamers targeted to prostate-specific membrane antigen (PSMA) and encapsulated paclitaxel (PTX). We also investigated their impact on ultrasound (US) imaging and therapy of prostate cancer. PTX-A10-3.2-PLGA NBs were developed using water-in-oil-in-water (water/oil/water) double emulsion and carbodiimide chemistry approaches. Fluorescence imaging together with flow cytometry verified that the PTX-A10-3...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28742687/the-allosteric-hemoglobin-effector-itpp-inhibits-metastatic-colon-cancer-in-mice
#3
Perparim Limani, Michael Linecker, Marcel A Schneider, Philipp Kron, Christoph Tschuor, Ekaterina Kachaylo, Udo Ungethuem, Claude Nicolau, Jean-Marie Lehn, Rolf Graf, Bostjan Humar, Pierre-Alain Clavien
OBJECTIVE: To test the effects of enhanced intracellular oxygen contents on the metastatic potential of colon cancer. BACKGROUND: Colorectal cancer is the commonest gastrointestinal carcinoma. Distant metastases occur in half of patients and are responsible for most cancer-related deaths. Tumor hypoxia is central to the pathogenesis of metastases. Myo-Inositoltrispyrophosphate (ITPP), a nontoxic, antihypoxic compound, has recently shown significant benefits in experimental cancer, particularly when combined with standard chemotherapy...
July 24, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28740605/synthesis-of-a-fluorescently-labeled-68-ga-dota-toc-analog-for-somatostatin-receptor-targeting
#4
Sukhen C Ghosh, Servando Hernandez Vargas, Melissa Rodriguez, Susanne Kossatz, Julie Voss, Kendra S Carmon, Thomas Reiner, Agnes Schonbrunn, Ali Azhdarinia
Fluorescently labeled imaging agents can identify surgical margins in real-time to help achieve complete resections and minimize the likelihood of local recurrence. However, photon attenuation limits fluorescence-based imaging to superficial lesions or lesions that are a few millimeters beneath the tissue surface. Contrast agents that are dual-labeled with a radionuclide and fluorescent dye can overcome this limitation and combine quantitative, whole-body nuclear imaging with intraoperative fluorescence imaging...
July 13, 2017: ACS Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28738091/the-second-window-icg-technique-demonstrates-a-broad-plateau-period-for-near-infrared-fluorescence-tumor-contrast-in-glioblastoma
#5
Ryan Zeh, Saad Sheikh, Leilei Xia, John Pierce, Andrew Newton, Jarrod Predina, Steve Cho, MacLean Nasrallah, Sunil Singhal, Jay Dorsey, John Y K Lee
INTRODUCTION: Fluorescence-guided surgery has emerged as a powerful tool to detect, localize and resect tumors in the operative setting. Our laboratory has pioneered a novel way to administer an FDA-approved near-infrared (NIR) contrast agent to help surgeons with this task. This technique, coined Second Window ICG, exploits the natural permeability of tumor vasculature and its poor clearance to deliver high doses of indocyanine green (ICG) to tumors. This technique differs substantially from established ICG video angiography techniques that visualize ICG within minutes of injection...
2017: PloS One
https://www.readbyqxmd.com/read/28732245/interleukin-4-receptor-targeted-delivery-of-bcl-xl-sirna-sensitizes-tumors-to-chemotherapy-and-inhibits-tumor-growth
#6
Padmanaban Guruprasath, Jihoon Kim, Gowri Rangaswamy Gunassekaran, Lianhua Chi, Soyoun Kim, Rang-Woon Park, Sang-Hyun Kim, Moon-Chang Baek, Sang Mun Bae, Sang-Yeob Kim, Dong-Kyu Kim, In-Kyu Park, Won-Jong Kim, Byungheon Lee
IL-4 receptor (IL-4R) is commonly up-regulated on tumor cells, and interactions between the receptor and Interleukin-4 (IL-4) can induce the expression of anti-apoptotic proteins, including Bcl-xL. This contributes to tumor cell survival and their resistance to chemotherapy. In this study, we exploited IL-4R-targeted delivery of Bcl-xL siRNA to IL-4R-expressing tumor cells in order to sensitize them to chemotherapy. To target IL-4R, an IL-4R-binding peptide, IL4RPep-1, was attached to branched polyethyleneimine-superparamagnetic iron oxide nanoparticles (BPEI-SPION)...
October 2017: Biomaterials
https://www.readbyqxmd.com/read/28709020/ruthenium-complexes-polypeptide-self-assembled-nanoparticles-for-identification-of-bacterial-infection-and-targeted-antibacterial-research
#7
Na Huang, Xu Chen, Xufeng Zhu, Mengmeng Xu, Jie Liu
Bacterial infection has been a threat to human health, and so early diagnosis and treatment of bacterial infection is an urgent problem that needs to be solved. In this work, a multifunctional theranostic selenium nanoplatform (Se@PEP-Ru NPs) with early imaging diagnosis and efficient treatment of bacterial infections was designed and constructed. First, the antibacterial peptide UBI29-41 (PEP) was linked to functionalized Selenium nanoparticles (NPs), which enhanced the stability of the antimicrobial peptide and also caused the nanocomposites to specifically target bacterial infection...
July 5, 2017: Biomaterials
https://www.readbyqxmd.com/read/28708389/nanostructured-phthalocyanine-assemblies-with-protein-driven-switchable-photoactivities-for-biophotonic-imaging-and-therapy
#8
Xingshu Li, C-Yoon Kim, Seunghyun Lee, Dayoung Lee, Hyung-Min Chung, Gyoungmi Kim, Si-Hyun Heo, Chulhong Kim, Ki-Sung Hong, Juyoung Yoon
Switchable phototheranostic nanomaterials are of particular interest for specific biosensing, high-quality imaging, and targeted therapy in the field of precision nanomedicine. Here, we develop a "one-for-all" nanomaterial that self-assembles from flexible and versatile phthalocyanine building blocks. The nanostructured phthalocyanine assemblies (NanoPcTBs) display intrinsically unique photothermal and photoacoustic properties. Fluorescence and reactive oxygen species generation can be triggered depending on a targeted, protein-induced, partial disassembly mechanism, which creates opportunities for low-background fluorescence imaging and activatable photodynamic therapy...
July 25, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28705622/long-term-toxicological-effects-of-persistent-luminescence-nanoparticles-after-intravenous-injection-in-mice
#9
Gonzálo Ramírez-García, Silvia Gutiérrez-Granados, Marco A Gallegos-Corona, Lourdes Palma-Tirado, Fanny d'Orlyé, Anne Varenne, Nathalie Mignet, Cyrille Richard, Minerva Martínez-Alfaro
The ZnGa1.995Cr0.005O4 persistent luminescence nanoparticles offer the promise of revolutionary tools for biological imaging with applications such as cell tracking or tumor detection. They can be re-excited through living tissues by visible photons, allowing observations without any time constraints and avoiding the undesirable auto-fluorescence signals observed when fluorescent probes are used. Despite all these advantages, their uses demand extensive toxicological evaluation and control. With this purpose, mice were injected with a single intravenous administration of hydroxylated or PEGylated persistent luminescence nanoparticles at different concentrations and then a set of standard tests were carried out 1day, 1 month and 6 months after the administration...
July 10, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28700898/sub-100nm-long-tumor-retention-sn-38-loaded-photonic-micelles-for-tri-modal-cancer-therapy
#10
Xixiao Yang, Xiangdong Xue, Yan Luo, Tzu-Yin Lin, Hongyong Zhang, Diana Lac, Kai Xiao, Yixuan He, Bei Jia, Kit S Lam, Yuanpei Li
The tumor penetration and accumulation of nanoparticle-based drug delivery systems are highly dependent on the particle size. Nanomedicines in the sub-100nm range have been suggested by previous studies to have superior antitumor efficacy on various solid tumors. SN-38 is a very important and highly potent drug for several cancers including colon cancer. However, due to the ultra-flat aromatic structure of SN-38, it is typically very difficult to produce sub-100nm, SN-38-encapsulated nanoparticles without modification of the chemical structure...
September 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28699046/optical-clearing-and-fluorescence-deep-tissue-imaging-for-3d-quantitative-analysis-of-the-brain-tumor-microenvironment
#11
Tonny Lagerweij, Sophie A Dusoswa, Adrian Negrean, Esther M L Hendrikx, Helga E de Vries, Jeroen Kole, Juan J Garcia-Vallejo, Huibert D Mansvelder, W Peter Vandertop, David P Noske, Bakhos A Tannous, René J P Musters, Yvette van Kooyk, Pieter Wesseling, Xi Wen Zhao, Thomas Wurdinger
BACKGROUND: Three-dimensional visualization of the brain vasculature and its interactions with surrounding cells may shed light on diseases where aberrant microvascular organization is involved, including glioblastoma (GBM). Intravital confocal imaging allows 3D visualization of microvascular structures and migration of cells in the brain of mice, however, with limited imaging depth. To enable comprehensive analysis of GBM and the brain microenvironment, in-depth 3D imaging methods are needed...
July 11, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28688684/early-detection-of-squamous-cell-carcinoma-in-carcinogen-induced-oral-cancer-rodent-model-by-ratiometric-activatable-cell-penetrating-peptides
#12
Dina V Hingorani, Aaron J Lemieux, Joseph R Acevedo, Heather L Glasgow, Suraj Kedarisetty, Michael A Whitney, Alfredo A Molinolo, Roger Y Tsien, Quyen T Nguyen
OBJECTIVES: Ratiometric cell-penetrating-peptides (RACPP) are hairpin-shaped molecules that undergo cleavage by tumor-associated proteases resulting in measurable Cy5:Cy7 fluorescence ratiometric change to label cancer in vivo. We evaluated an MMP cleavable RACPP for use in the early detection of malignant lesions in a carcinogen-induced rodent tumor model. METHODS: Wild-type immune-competent mice were given 4-nitroquinoline-oxide (4NQO) for 16weeks. Oral cavities from live mice that had been intravenously administered MMP cleavable PLGC(Me)AG-RACPP were serially imaged from week 11 through week 21 using white-light reflectance and Cy5:Cy7 ratiometric fluorescence...
August 2017: Oral Oncology
https://www.readbyqxmd.com/read/28686661/engineering-of-monobody-conjugates-for-human-epha2-specific-optical-imaging
#13
Min-A Kim, Hee Seung Yoon, Seung-Hwan Park, Dong-Yeon Kim, Ayoung Pyo, Hyeon Sik Kim, Jung-Joon Min, Yeongjin Hong
In a previous study, we developed an E1 monobody specific for the tumor biomarker hEphA2 [PLoS ONE (2015) 10(7): e0132976]. E1 showed potential as a molecular probe for in vitro and in vivo targeting of cancers overexpressing hEphA2. In the present study, we constructed expression vectors for E1 conjugated to optical reporters such as Renilla luciferase variant 8 (Rluc8) or enhanced green fluorescent protein (EGFP) and purified such recombinant proteins by affinity chromatography in E. coli. E1-Rluc8 and E1-EGFP specifically bound to hEphA2 in human prostate cancer PC3 cells but not in human cervical cancer HeLa cells, which express hEphA2 at high and low levels, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28673056/resveratrol-loaded-albumin-nanoparticles-with-prolonged-blood-circulation-and-improved-biocompatibility-for-highly-effective-targeted-pancreatic-tumor-therapy
#14
Tao Geng, Xia Zhao, Meng Ma, Gang Zhu, Ling Yin
Human serum albumin (HSA) is an intrinsic protein and important carrier that transports endogenous as well as exogenous substances across cell membranes. Herein, we have designed and prepared resveratrol (RV)-loaded HSA nanoparticles conjugating RGD (arginine-glycine-aspartate) via a polyethylene glycol (PEG) "bridge" (HRP-RGD NPs) for highly effective targeted pancreatic tumor therapy. HRP-RGD NPs possess an average size of 120 ± 2.6 nm with a narrow distribution, a homodisperse spherical shape, a RV encapsulation efficiency of 62...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28671975/in-and-ex-vivo-molecular-imaging-of-apoptosis-to-assess-sensitivity-of-non-small-cell-lung-cancer-to-egfr-inhibitors-using-probe-based-confocal-laser-endomicroscopy
#15
Florian Guisier, Pierre Bohn, Maxime Patout, Nicolas Piton, Insaf Farah, Pierre Vera, Luc Thiberville, Mathieu Salaün
BACKGROUND: Prediction of treatment outcome of non-small cell lung cancer (NSCLC) with EGFR inhibitors on the basis of the genetic analysis of the tumor can be incorrect in case of rare or complex mutations, bypass molecular activation pathways, or pharmacodynamic variations. The aim of this study was to develop an ex vivo and in vivo real-time quantitative imaging test for EGFR inhibitors sensitivity assessment. METHODS: Erlotinib resistant (A549, H460, H1975), insensitive (H1650) and hypersensitive (HCC827) cell lines were injected subcutaneously in Nude mice...
2017: PloS One
https://www.readbyqxmd.com/read/28670120/near-infrared-light-triggered-theranostics-for-tumor-specific-enhanced-multimodal-imaging-and-photothermal-therapy
#16
Bo Wu, Bing Wan, Shu-Ting Lu, Kai Deng, Xiao-Qi Li, Bao-Lin Wu, Yu-Shuang Li, Ru-Fang Liao, Shi-Wen Huang, Hai-Bo Xu
The major challenge in current clinic contrast agents (CAs) and chemotherapy is the poor tumor selectivity and response. Based on the self-quench property of IR820 at high concentrations, and different contrast effect ability of Gd-DOTA between inner and outer of liposome, we developed "bomb-like" light-triggered CAs (LTCAs) for enhanced CT/MRI/FI multimodal imaging, which can improve the signal-to-noise ratio of tumor tissue specifically. IR820, Iohexol and Gd-chelates were firstly encapsulated into the thermal-sensitive nanocarrier with a high concentration...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28663929/noninvasive-depth-estimation-using-tissue-optical-properties-and-a-dual-wavelength-fluorescent-molecular-probe-in-vivo
#17
Jessica P Miller, Dolonchampa Maji, Jesse Lam, Bruce J Tromberg, Samuel Achilefu
Translation of fluorescence imaging using molecularly targeted imaging agents for real-time assessment of surgical margins in the operating room requires a fast and reliable method to predict tumor depth from planar optical imaging. Here, we developed a dual-wavelength fluorescent molecular probe with distinct visible and near-infrared excitation and emission spectra for depth estimation in mice and a method to predict the optical properties of the imaging medium such that the technique is applicable to a range of medium types...
June 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28663143/oxygen-self-enriched-nanoparticles-functionalized-with-erythrocyte-membranes-for-long-circulation-and-enhanced-phototherapy
#18
Hao Ren, Jiaqi Liu, Yuqin Li, Haoran Wang, Sizhan Ge, Ahu Yuan, Yiqiao Hu, Jinhui Wu
In recent years, indocyanine green (ICG) encapsulated in different kinds of nano-carriers have been developed to overcome its short lifetime in vivo and non-selectivity in cancer cells. However, these nanoparticles are still easily recognized and captured by the reticuloendothelial system (RES) and the low singlet oxygen quantum (0.08) of ICG inevitably leads to a limited efficacy of phototherapy. To overcome these limitations, a novel oxygen self-enriched biomimetic red blood cell (RBC) was developed by cloaking albumin nanoparticles which contained ICG and perfluorocarbon (PFC) with RBC membranes...
September 1, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28653778/activatable-near-infrared-probe-for-fluorescence-imaging-of-%C3%AE-glutamyl-transpeptidase-in-tumor-cells-and-in-vivo
#19
Zhiliang Luo, Liandong Feng, Ruibing An, Guanfu Duan, Runqi Yan, Hua Shi, Jian He, Zhengyang Zhou, Changge Ji, Hong-Yuan Chen, Deju Ye
γ-Glutamyl transpeptidase (GGT) is a cell membrane-bound enzyme that is involved in various physiological and pathological processes and is regarded as a potential biomarker for many malignant tumors, precise detection of which is useful for early cancer diagnosis. Herein, we reported a new GGT activatable near-infrared (NIR) fluorescence imaging probe (GANP) by linking of a GGT-recognitive substrate γ-glutamate (γ-Glu) and a NIR merocyanine fluorophore (mCy-Cl) with a self-immolative linker p-aminobenzyl alcohol (PABA)...
June 27, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28648478/imaging-vulnerable-plaques-by-targeting-inflammation-in-atherosclerosis-using-fluorescent-labeled-dual-ligand-microparticles-of-iron-oxide-and-magnetic-resonance-imaging
#20
Joyce M S Chan, Claudia Monaco, Marzena Wylezinska-Arridge, Jordi L Tremoleda, Jennifer E Cole, Michael Goddard, Maggie S H Cheung, Kishore K Bhakoo, Richard G J Gibbs
OBJECTIVE: Identification of patients with high-risk asymptomatic carotid plaques remains an elusive but essential step in stroke prevention. Inflammation is a key process in plaque destabilization and a prelude to clinical sequelae. There are currently no clinical imaging tools to assess the inflammatory activity within plaques. This study characterized inflammation in atherosclerosis using dual-targeted microparticles of iron oxide (DT-MPIO) as a magnetic resonance imaging (MRI) probe...
June 22, 2017: Journal of Vascular Surgery
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