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Fluorescence imaging in tumor mice

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https://www.readbyqxmd.com/read/28088445/synthesis-and-exploration-of-novel-radiolabeled-bombesin-peptides-for-targeting-receptor-positive-tumor
#1
Kakali De, Indranil Banerjee, Samarendu Sinha, Shantanu Ganguly
Increasing evidence of peptide receptor overexpression in various cancer cells, warrant the development of receptor specific radiolabeled peptides for molecular imaging and therapy in nuclear medicine. Gastrin-releasing-peptide (GRP) receptor, are overexpressed in a variety of human cancer cells. The present study report the synthesis and biological evaluation of new bombesin (BBN) analogs, HYNIC-Asp-[Phe(13)]BBN(7-13)-NH-CH2-CH2-CH3:BA1, HYNIC-Pro-[Tyr(13)Met(14)]BBN(7-14)NH2:BA2 as prospective tumor imaging agent with compare to BBN(7-14)NH2:BS as standard...
January 11, 2017: Peptides
https://www.readbyqxmd.com/read/28075596/yeast-microcapsule-mediated-targeted-delivery-of-diverse-nanoparticles-for-imaging-and-therapy-via-the-oral-route
#2
Xing Zhou, Xiangjun Zhang, Songling Han, Yin Dou, Mengyu Liu, Lin Zhang, Jia Wei Guo, Qing Shi, Genghao Gong, Ruibing Wang, Jiang Hu, Xiaohui Li, Jianxiang Zhang
Targeting of nanoparticles to distant diseased sites after oral delivery remains highly challenging, due to the existence of many biological barriers in the gastrointestinal tract. Here we report targeted oral delivery of diverse nanoparticles in multiple disease models, via a 'Trojan horse' strategy based on a bioinspired yeast capsule (YC). Diverse charged nanoprobes including quantum dots (QDs), iron oxide nanoparticles (IONPs), and assembled organic fluorescent nanoparticles can be effectively loaded into YC through electrostatic force-driven spontaneous deposition, resulting in different diagnostic YC assemblies...
January 11, 2017: Nano Letters
https://www.readbyqxmd.com/read/28071889/enzyme-and-redox-dual-triggered-intracellular-release-from-actively-targeted-polymeric-micelles
#3
Lei Zhang, Yi Wang, Xiaobin Zhang, Xiao Wei, Xiang Xiong, Shaobing Zhou
Highly effective delivery of therapeutic agents into target cells using nanocarriers and subsequently rapid intracellular release are of great importance in cancer treatment. Here, we developed an enzyme and redox dual-responsive polymeric micelle with active targeting abilities to achieve rapid intracellular drug release. To overcome both its poor solubility in water and instability in the blood circulation, camptothecin (CPT) was chemically conjugated to monomethyl poly(ethylene glycol) (mPEG) via a redox-responsive linker to form polymeric prodrugs...
January 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28069800/label-free-raman-spectroscopy-detects-stromal-adaptations-in-premetastatic-lungs-primed-by-breast-cancer
#4
Santosh Kumar Paidi, Asif Rizwan, Chao Zheng, Menglin Cheng, Kristine Glunde, Ishan Barman
Recent advances in animal modeling, imaging technology, and functional genomics have permitted precise molecular observations of the metastatic process. However, a comprehensive understanding of the premetastatic niche remains elusive, owing to the limited tools that can map subtle differences in molecular mediators in organ-specific microenvironments. Here, we report the ability to detect premetastatic changes in the lung microenvironment, in response to primary breast tumors, using a combination of metastatic mouse models, Raman spectroscopy, and multivariate analysis of consistent patterns in molecular expression...
November 15, 2016: Cancer Research
https://www.readbyqxmd.com/read/28049064/nanoparticles-for-multi-modality-cancer-diagnosis-simple-protocol-for-self-assembly-of-gold-nanoclusters-mediated-by-gadolinium-ions
#5
Wenxiu Hou, Fangfang Xia, Gabriel Alfranca, Hao Yan, Xiao Zhi, Yanlei Liu, Chen Peng, Chunlei Zhang, Jesus Martinez de la Fuente, Daxiang Cui
It is essential to develop a simple synthetic strategy to improve the quality of multifunctional contrast agents for cancer diagnosis. Herein, we report a time-saving method for gadolinium (Gd(3+)) ions-mediated self-assembly of gold nanoclusters (GNCs) into monodisperse spherical nanoparticles (GNCNs) under mild conditions. The monodisperse, regular and colloidal stable GNCNs were formed via selectively inducing electrostatic interactions between negatively-charged carboxylic groups of gold nanoclusters and trivalent cations of gadolinium in aqueous solution...
December 27, 2016: Biomaterials
https://www.readbyqxmd.com/read/28047031/th-ef-207a-06-high-resolution-optical-ct-ect-imaging-of-unstained-mice-femur-brain-spleen-and-tumor
#6
S Yoon, M Boss, S Birer, M Dewhirst, M Oldham
PURPOSE: Optical transmission and emission computed tomography (optical-CT/ECT) provides high-resolution 3D attenuation and emission maps in unsectioned large (∼1cm(3) ) ex vivo tissue samples at a resolution of 12.9µm(3) per voxel. Here we apply optical-CT/ECT to investigate high-resolution structure and auto-fluorescence in a range of optically cleared mice organs, including, for the first time, mouse bone (femur), opening the potential for study of bone metastasis and bone-mediated immune response...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28042324/mapping-sentinel-lymph-node-metastasis-by-dual-probe-optical-imaging
#7
Xiangyu Yang, Zhe Wang, Fuwu Zhang, Guizhi Zhu, Jibin Song, Gao-Jun Teng, Gang Niu, Xiaoyuan Chen
Purpose: Sentinel lymph node biopsy (SLNB) has emerged as the preferred standard procedure in patients with breast cancer, melanoma and other types of cancer. Herein, we developed a method to intra-operatively map SLNs and differentiate tumor metastases within SLNs at the same time, with the aim to provide more accurate and real-time intraoperative guidance. Experimental Design: Hyaluronic acid (HA), a ligand of lymphatic vessel endothelial hyaluronan receptor (LYVE)-1, is employed as a SLN mapping agent after being conjugated with a near-infrared fluorophore (Cy5...
2017: Theranostics
https://www.readbyqxmd.com/read/28039709/bevacizumab-followed-by-chemotherapy-is-potential-therapy-for-gastric-cancer
#8
Yalei Lv, Lina Song, Liang Chang, Yan Liu, Xiaolin Zhang, Yudong Wang, Long Wang, Wei Liu
PURPOSE: To investigate the antitumor effects of the angiogenesis inhibitor bevacizumab combined with chemotherapy, and the application of in vivo imaging technology of growth of fluorescence-labelled gastric cancer (GC) in nude mice. METHODS: Twenty-five nude mice were randomly divided into 5 groups (A-E). Subcutaneous xenograft of human MGC803 cells was transplanted to nude mice, followed by different treatments for the groups, including A (bevacizumab combined with chemotherapy), B (24-h chemotherapy with FP followed by bevacizumab), C (bevacizumab 24-h followed by FP chemotherapy), D (bevacizumab only) and E (normal saline)...
November 2016: Journal of B.U.ON.: Official Journal of the Balkan Union of Oncology
https://www.readbyqxmd.com/read/28029039/stimuli-sensitive-biodegradable-and-amphiphilic-block-copolymer-gemcitabine-conjugates-self-assemble-into-a-nanoscale-vehicle-for-cancer-therapy
#9
Zhenyu Duan, Yanhong Zhang, Hongyan Zhu, Ling Sun, Hao Cai, Bijin Li, Qiyong Gong, Zhongwei Gu, Kui Luo
The availability and the stability of current anticancer agents, particularly water-insoluble drugs, are still far from satisfactory. A widely used anticancer drug, gemcitabine (GEM), is so poorly stable in circulation that some polymeric drug-delivery systems have been under development for sometimes to improve its therapeutic indexes. Herein, we designed, prepared and characterized a biodegradable amphiphilic block N-(2-hydroxypropyl) methacrylamide (HPMA) copolymer-GEM conjugate-based nanoscale and stimuli-responsive drug delivery vehicle...
December 28, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28027442/theranostic-liposomes-with-hypoxia-activated-prodrug-to-effectively-destruct-hypoxic-tumors-post-photodynamic-therapy
#10
Liangzhu Feng, Liang Cheng, Ziliang Dong, Danlei Tao, Todd E Barnhart, Weibo Cai, Meiwan Chen, Zhuang Liu
Photodynamic therapy (PDT), a noninvasive cancer therapeutic method triggered by light, would lead to severe tumor hypoxia after treatment. Utilizing a hypoxia-activated prodrug, AQ4N, which only shows toxicity to cancer cells under hypoxic environment, herein, a multipurpose liposome is prepared by encapsulating hydrophilic AQ4N and hydrophobic hexadecylamine conjugated chlorin e6 (hCe6), a photosensitizer, into its aqueous cavity and hydrophobic bilayer, respectively. After chelating a (64)Cu isotope with Ce6, the obtained AQ4N-(64)Cu-hCe6-liposome is demonstrated to be an effective imaging probe for in vivo positron emission tomography, which together with in vivo fluorescence and photoacoustic imaging uncovers efficient passive homing of those liposomes after intravenous injection...
December 29, 2016: ACS Nano
https://www.readbyqxmd.com/read/28018738/depth-resolved-imaging-of-colon-tumor-using-optical-coherence-tomography-and-fluorescence-laminar-optical-tomography
#11
Qinggong Tang, Jianting Wang, Aaron Frank, Jonathan Lin, Zhifang Li, Chao-Wei Chen, Lily Jin, Tongtong Wu, Bruce D Greenwald, Hiroshi Mashimo, Yu Chen
Early detection of neoplastic changes remains a critical challenge in clinical cancer diagnosis and treatment. Many cancers arise from epithelial layers such as those of the gastrointestinal (GI) tract. Current standard endoscopic technology is difficult to detect the subsurface lesions. In this research, we investigated the feasibility of a novel multi-modal optical imaging approach including high-resolution optical coherence tomography (OCT) and high-sensitivity fluorescence laminar optical tomography (FLOT) for structural and molecular imaging...
December 1, 2016: Biomedical Optics Express
https://www.readbyqxmd.com/read/28017889/blood-brain-barrier-penetrating-amphiphilic-polymer-nanoparticles-deliver-docetaxel-for-the-treatment-of-brain-metastases-of-triple-negative-breast-cancer
#12
Chunsheng He, Ping Cai, Jason Li, Tian Zhang, Lucy Lin, Azhar Z Abbasi, Jeffrey T Henderson, Andrew Michael Rauth, Xiao Yu Wu
Brain metastasis is a fatal disease with limited treatment options and very short survival. Although systemic chemotherapy has some effect on peripheral metastases of breast cancer, it is ineffective in treating brain metastasis due largely to the blood-brain barrier (BBB). Here we developed a BBB-penetrating amphiphilic polymer-lipid nanoparticle (NP) system that efficiently delivered anti-mitotic drug docetaxel (DTX) for the treatment of brain metastasis of triple negative breast cancer (TNBC). We evaluated the biodistribution, brain accumulation, pharmacokinetics and efficacy of DTX-NP in a mouse model of brain metastasis of TNBC...
December 23, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28004770/multimodal-magnetic-resonance-and-near-infrared-fluorescent-imaging-of-intraperitoneal-ovarian-cancer-using-a-dual-mode-dual-gadolinium-liposomal-contrast-agent
#13
M K Ravoori, S Singh, R Bhavane, A K Sood, B Anvari, J Bankson, A Annapragada, V Kundra
The degree of tumor removal at surgery is a major factor in predicting outcome for ovarian cancer. A single multimodality agent that can be used with magnetic resonance (MR) for staging and pre-surgical planning, and with optical imaging to aid surgical removal of tumors, would present a new paradigm for ovarian cancer. We assessed whether a dual-mode, dual-Gadolinium (DM-Dual-Gd-ICG) contrast agent can be used to visualize ovarian tumors in the peritoneal cavity by multimodal MR and near infra-red imaging (NIR)...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28001364/-111-in-and-irdye800cw-labeled-pla-peg-nanoparticle-for-imaging-prostate-specific-membrane-antigen-expressing-tissues
#14
Sangeeta R Banerjee, Catherine A Foss, Allen Horhota, Mrudula Pullambhatla, Kevin McDonnell, Stephen Zale, Martin G Pomper
Targeted delivery of drug-encapsulated nanoparticles is a promising new approach to safe and effective therapeutics for cancer. Here we investigate the pharmacokinetics and biodistribution of a prostate-specific membrane antigen (PSMA)-targeted nanoparticle based on a poly(lactic acid)-polyethylene glycol copolymer by utilizing single photon emission computed tomography (SPECT) and fluorescence imaging of a low-molecular-weight, PSMA-targeting moiety attached to the surface and oriented toward the outside environment...
December 21, 2016: Biomacromolecules
https://www.readbyqxmd.com/read/27997794/reaction-based-semiconducting-polymer-nanoprobes-for-photoacoustic-imaging-of-protein-sulfenic-acids
#15
Yan Lyu, Xu Zhen, Yansong Miao, Kanyi Pu
Protein sulfenic acids play a key role in oxidative signal transduction of many biological and pathological processes; however, current chemical tools rely on visible fluorescence signals, limiting their utility to in vitro assays. We herein report reaction-based semiconducting polymer nanoprobes (rSPNs) with near-infrared absorption for in vivo photoacoustic (PA) imaging of protein sulfenic acids. rSPNs comprise an optically active semiconducting polymer as the core shielded with inert silica and poly(ethylene glycol) corona...
December 23, 2016: ACS Nano
https://www.readbyqxmd.com/read/27988405/self-quenched-semiconducting-polymer-nanoparticles-for-amplified-in%C3%A2-vivo-photoacoustic-imaging
#16
Chen Xie, Paul Kumar Upputuri, Xu Zhen, Manojit Pramanik, Kanyi Pu
Development of photoacoustic (PA) imaging agents provides opportunities for advancing PA imaging in fundamental biology and medicine. Despite the promise of semiconducting polymer nanoparticles (SPNs) for PA imaging, the molecular guidelines to enhance their imaging performance are limited. In this study, semiconducting polymers (SPs) with self-quenched fluorescence are synthesized and transformed into SPNs for amplified PA imaging in living mice. The self-quenched process is induced by the incorporation of an electron-deficient structure unit into the backbone of SPs, which in turn promotes the nonradiative decay and enhances the heat generation...
March 2017: Biomaterials
https://www.readbyqxmd.com/read/27987951/hyaluronic-acid-coated-nanoparticles-for-targeted-photodynamic-therapy-of-cancer-guided-by-near-infrared-and-mr-imaging
#17
Kyung Eun Park, Young-Woock Noh, Ahreum Kim, Yong Taik Lim
In this study, the multifaceted properties of hyaluronic acid (HA) were used for the targeted therapy of cancer by photodynamic therapy (PDT) guided by molecular imaging. Near-infrared (NIR) photosensitizers (Chlorin e6; Ce6) were encapsulated into poly(lactic-co-glycolic acid) nanoparticles (PLGA NPs) coated with HA that can act as CD44 targeting ligand. The abundant carboxylate groups of HA also enabled the chelation of gadolinium ions (Gd(3+)), T1-weighted MRI contrast agents, on the surface of PLGA NPs...
February 10, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/27987695/self-fluorescent-drug-delivery-vector-based-on-genipin-crosslinked-polyethylenimine-conjugated-globin-nanoparticle
#18
Yan Zhang, Lina Mao, Juan Liu, Tianjun Liu
A kind of self-fluorescent, biocompatible, and low-toxic Genipin crosslinked Globin-PEI nanoparticle (Gb-G-PEI NP) with high enzymolysis-stability and photo-stability was synthesized successfully. The properties of the Gb-G-PEI NP were characterized, including its particle size, surface zeta potential, morphology, paclitaxel (PTX) loading capacity and release. The Gb-G-PEI NPs as imaging probe were investigated by Confocal Laser Scanning Microscope (CLSM) in vitro and by fluorescence imaging system in vivo...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27976583/enhanced-antiglioma-efficacy-of-ultrahigh-loading-capacity-paclitaxel-prodrug-conjugate-self-assembled-targeted-nanoparticles
#19
Yan Jiang, Xiuzhen Wang, Xin Liu, Wei Lv, Hongjuan Zhang, Mingwan Zhang, Xinrui Li, Hongliang Xin, Qunwei Xu
Glioblastoma multiforme (GBM) presents one of the most lethal brain tumor with a dismal prognosis. And nanodrug delivery system (nano-DDS) have raised a lot of concern, while the conventional nanoformulations addressed many limitations, especially the low drug loading capacity and poor stability in vivo. Herein, we proposed PTX prodrug (PTX-SS-C18) conjugate self-assembled nanoparticles (PSNPs) functionalized with Pep-1, glioma homing peptide, to overcome the blood brain tumor barrier (BBTB) via interleukin 13 receptor α2 (IL-13Rα2)-mediated endocytosis for targeting GMB...
December 23, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27957498/tumorigenicity-and-validity-of-fluorescence-labelled-mesenchymal-and-epithelial-human-oral-cancer-cell-lines-in-nude-mice
#20
Wei Xin Cai, Li Wu Zheng, Li Ma, Hong Zhang Huang, Ru Qing Yu, Roger A Zwahlen
Tumorigenicity and metastatic activity can be visually monitored in cancer cells that were labelled with stable fluorescence. The aim was to establish and validate local and distant spread of subcutaneously previously injected fluorescence transduced human tongue cancer cell lines of epithelial and mesenchymal phenotype in nude mice. A total of 32 four-week-old male athymic Balb/c nude mice were randomly allocated into 4 groups (n = 8). A single dose of 0.3 mL PBS containing 1 × 107 of four different cancer cell-lines (UM1, UM1-GFP, UM2, and UM2-RFP) was injected subcutaneously into the right side of their posterolateral back...
2016: BioMed Research International
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