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Near-infrared fluorescence imaging

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https://www.readbyqxmd.com/read/28092049/rosette-assay-highly-customizable-dot-blot-for-sh2-domain-screening
#1
Khong Y Ng, Kazuya Machida
With a growing number of high-throughput studies, structural analyses, and availability of protein-protein interaction databases, it is now possible to apply web-based prediction tools to SH2 domain-interactions. However, in silico prediction is not always reliable and requires experimental validation. Rosette assay is a dot blot-based reverse-phase assay developed for the assessment of binding between SH2 domains and their ligands. It is conveniently customizable, allowing for low- to high-throughput analysis of interactions between various numbers of SH2 domains and their ligands, e...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28077373/determination-of-renal-function-and-injury-using-near-infrared-fluorimetry-in-experimental-cardiorenal-syndrome
#2
Mizuko Ikeda, Rumie Wakasaki, Katie J Schenning, Thomas Swide, Jeong Heon Lee, M Bernie Miller, Hak Soo Choi, Sharon Anderson, Michael P Hutchens
Cardiorenal syndrome type 1 causes acute kidney injury but is poorly understood; animal models and diagnostic aids are lacking. Robust noninvasive measurements of glomerular filtration rate are required for injury models and clinical use. Several have been described but are untested in translational models and suffer from biologic interference. We developed a mouse model of cardiorenal syndrome and tested the novel near-infrared fluorophore, ZW800-1, to assess renal and cardiac function. We performed murine cardiac arrest and cardiopulmonary resuscitation followed by transthoracic echocardiography, 2- and 24h later...
January 11, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28076610/intraoperative-near-infrared-fluorescent-imaging-during-robotic-operations
#3
Antonio Luiz de Vasconcellos Macedo, Vladimir Schraibman
The intraoperative identification of certain anatomical structures because they are small or visually occult may be challenging. The development of minimally invasive surgery brought additional difficulties to identify these structures due to the lack of complete tactile sensitivity. A number of different forms of intraoperative mapping have been tried. Recently, the near-infrared fluorescence imaging technology with indocyanine green has been added to robotic platforms. In addition, this technology has been tested in several types of operations, and has advantages such as safety, low cost and good results...
October 2016: Einstein
https://www.readbyqxmd.com/read/28074643/ultra-photostable-mesoporous-silica-coated-gap-enhanced-raman-tags-gerts-for-high-speed-bioimaging
#4
Yuqing Zhang, Yuanyuan Qiu, Li Lin, Hongchen Gu, Zeyu Xiao, Jian Ye
Surface enhanced Raman scattering (SERS) tags can be utilized as optical labeling nanoprobes similar to fluorescent dyes and quantum dots for bioimaging with additional advantages of the fingerprint vibrational signal as a unique optical code and the ultra-narrow linewidth for multiplexing. However, the development of SERS imaging technique is much less well-established compared to fluorescence imaging mainly due to the speed limitation. An effective strategy to improve the SERS imaging speed and simultaneously maintain the photostability of SERS tags has been never reported to the best of our knowledge...
January 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28073247/tuning-for-visible-fluorescence-and-near-infrared-phosphorescence-on-a-unimolecular-mechanically-sensitive-platform-via-adjustable-ch-%C3%AF-interaction
#5
Hongwei Wu, Pei Zhao, Xin Li, Wenbo Chen, Hans Ågren, Qing Zhang, Liangliang Zhu
CH-π interaction assisted alignment of organic conjugated systems has played an important role to regulate molecular electronic and photophysical properties, whereas harnessing such a smart non-covalent interaction into the tuning of unimolecular complex emissive bands covering a wide spectral region remains a challenging research topic. Since the tuning for visible and near-infrared emissive properties in a single π-functional platform relates to its multi-color luminescent behaviors and potential superior application in analysis, imaging and sensing, we here report that a proportional control of the singlet and triplet emissions that cover visible and near-infrared spectral region, respectively, can be straightforwardly achieved by CH-π interaction assisted self-assembly at the unimolecular level...
January 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28067380/a-single-light-triggered-and-dual-imaging-guided-multifunctional-platform-for-combined-photothermal-and-photodynamic-therapy-based-on-td-controlled-and-icg-loaded-cus-msio2
#6
Qing You, Qi Sun, Jinping Wang, Xiaoxiao Tan, Xiaojuan Pang, Li Liu, Meng Yu, Fengping Tan, Nan Li
Near-infrared (NIR)-responsive drug delivery systems have received enormous attention because of their good biocompatibility and high biological penetration. In this work, we report a novel 1-tetradecanol (TD)-controlled and indocyanine green (ICG)-loaded CuS@mSiO2 phototherapy nanoplatform (CuS@mSiO2-TD/ICG). The CuS@mSiO2 nanoparticles prepared by a facile one-pot approach can serve as drug-delivery vehicles to transport the NIR absorbing phototherapeutic agent (ICG) within the mesoporous cavities. Meanwhile a phase-change molecule (PCM), TD, is introduced as a thermosensitive gatekeeper to avoid the premature release of loaded ICG...
January 9, 2017: Nanoscale
https://www.readbyqxmd.com/read/28067047/solvatochromic-and-fluorogenic-dyes-as-environment-sensitive-probes-design-and-biological-applications
#7
Andrey S Klymchenko
Fluorescent environment-sensitive probes are specially designed dyes that change their fluorescence intensity (fluorogenic dyes) or color (e.g., solvatochromic dyes) in response to change in their microenvironment polarity, viscosity, and molecular order. The studies of the past decade, including those of our group, have shown that these molecules become universal tools in fluorescence sensing and imaging. In fact, any biomolecular interaction or change in biomolecular organization results in modification of the local microenvironment, which can be directly monitored by these types of probes...
January 9, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28066678/clinical-use-of-near-infrared-fluorescence-imaging-with-indocyanine-green-in-thoracic-surgery-a-literature-review
#8
REVIEW
Chien-Hung Chiu, Yin-Kai Chao, Yun-Hen Liu, Chih-Tsung Wen, Wei-Hsun Chen, Ching-Yang Wu, Ming-Ju Hsieh, Yi-Cheng Wu, Hui-Ping Liu
Invisible near-infrared (NIR) fluorescence imaging with indocyanine green (ICG) has advantage in detecting for certain anatomy. The method is currently used in some types of surgery, such as sentinel lymph node (SLN) mapping, intraoperative solid tumor identification, and organ perfusion assessment. However, the literature of clinical application in thoracic surgery is lacking. This paper presents the advantages, current applications and potential developments of NIR fluorescence imaging with ICG in thoracic surgery...
October 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28066677/applications-of-indocyanine-green-based-near-infrared-fluorescence-imaging-in-thoracic-surgery
#9
REVIEW
Jian Zhou, Fan Yang, Guanchao Jiang, Jun Wang
Near-infrared (NIR) fluorescence guided surgery is an emerging technique. This technique uses the combination of dyes and NIR imaging devices to expand the visible spectrum. Thus it can provide more anatomic and functional information, and may facilitate a more complete resection of cancer, or better protection of important normal structures. Recently, significant progress has been made in the field of NIR fluorescence guided thoracic surgery. This may lead to better prognosis and health-economic outcomes. In this article, the current studies of indocyanine green (ICG) based NIR fluorescence guided thoracic surgeries are reviewed...
October 2016: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28062502/targeting-elastase-for-molecular-imaging-of-early-atherosclerotic-lesions
#10
Almut Glinzer, Xiaopeng Ma, Jaya Prakash, Melanie A Kimm, Fabian Lohöfer, Katja Kosanke, Jaroslav Pelisek, Moritz P Thon, Sandra Vorlova, Katrin G Heinze, Hans-Henning Eckstein, Michael W Gee, Vasilis Nitziachristos, Alma Zernecke, Moritz Wildgruber
OBJECTIVE: Neutrophils accumulate in early atherosclerotic lesions and promote lesion growth. In this study, we evaluated an elastase-specific near-infrared imaging agent for molecular imaging using hybrid fluorescence molecular tomography/x-ray computed tomography. APPROACH AND RESULTS: Murine neutrophils were isolated from bone marrow and incubated with the neutrophil-targeted near-infrared imaging agent Neutrophil Elastase 680 FAST for proof of principle experiments, verifying that the elastase-targeted fluorescent agent is specifically cleaved and activated by neutrophil content after lysis or cell stimulation...
December 29, 2016: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28059501/a-high-quantum-yield-mitochondria-targeting-near-infrared-fluorescent-probe-for-imaging-native-hypobromous-acid-in-living-cells-and-in-vivo
#11
Xiaojun Liu, Aishan Zheng, Dongrui Luan, Xiaoting Wang, Fanpeng Kong, Lili Tong, Kehua Xu, Bo Tang
The discovery that hypobromous acid (HOBr) can regulate the activity of collagen IV has attracted great attention. However, HOBr as an important reactive small molecule has hardly ever been studied using a detection method suitable for organisms. Herein, a high-quantum-yield mitochondria-targeting near-infrared (NIR) fluorescent probe for HOBr, RhSN-mito, was designed. RhSN-mito was easily obtained by the Suzuki cross-coupling reaction. The test results show that RhSN-mito can rapidly respond to HOBr with ultrasensitivity and high selectivity...
January 5, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28059225/generalized-vector-wave-theory-for-ultrahigh-resolution-confocal-optical-microscopy
#12
Ken Yang, Xiangsheng Xie, Jianying Zhou
Polarization modulation of a tightly focused beam in a confocal imaging scheme is considered for incident and collected light fields. Rigorous vector wave theory of a confocal optical microscopy is developed, which provides clear physical pictures without the requirement for fragmentary calculations. Multiple spatial modulations on polarization, phase, or amplitude of the illuminating and the detected beams can be mathematically described by a uniform expression. Linear and nonlinear excitation schemes are derived with tailored excitation and detection fields within this generalized theory, whose results show that the ultimate resolution achieved with the linear excitation can reach one-fifth of the excitation wavelength (or λ/5), while the nonlinear excitation scheme gives rise to a resolution better than λ/12 for two-photon fluorescence excitation and λ/20 for three-photon fluorescence excitation...
January 1, 2017: Journal of the Optical Society of America. A, Optics, Image Science, and Vision
https://www.readbyqxmd.com/read/28054764/two-step-assembling-of-near-infrared-off-on-fluorescent-nanohybrids-for-synchronously-tumor-imaging-and-microrna-modulation-based-therapy
#13
Xiongwei Deng, Zhaoxia Yin, Jianqing Lu, Yang Xia, Leihou Shao, Qin Hu, Zhi Xiang Zhou, Fang Zhang, Shao Mei Zhou, Yan Wu, Wang Sheng, Yi Zeng
Theranostic nanoparticles with combined imaging and therapy functions show great promise in cancer precision medicine. In this study, we reported on the construction of near-infrared (NIR) "OFF-ON" fluorescent nanohybrids (miR-203/F-PNDs) for synchronously tumor imaging and microRNA (miRNA) modulation therapy against esophageal cancer. Nanodiamond clusters (NDs) were firstly functionalized for protamine sulfate immobilization (PNDs) on their surfaces via a non-covalent self-assembling approach and simultaneous encapsulation of NIR emitting fluorescence dye cyanine 5 (Cy-5) (F-PNDs)...
January 5, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28050750/a-novel-modality-for-functional-imaging-in-acute-intervertebral-disk-herniation-via-tracking-leukocyte-infiltration
#14
Li Xiao, Mengmeng Ding, Yi Zhang, Mahendra Chordia, Dongfeng Pan, Adam Shimer, Francis Shen, David Glover, Li Jin, Xudong Li
PURPOSE: Inflammation plays a key role in the progression of intervertebral disk (IVD) herniation and associated low back pain. However, real-time spatial diagnosis of inflammation associated with acute disk herniation has not been investigated. We sought to detect local neutrophil and macrophage infiltration near disk herniation via the formyl peptide receptor 1 (FPR1)-mediated molecular imaging in a disk puncture mouse model to elucidate pathophysiological process of disk herniation...
January 3, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28050673/synthesis-of-a-novel-ir-822-met-near-infrared-probe-for-in-vivo-tumor-diagnosis
#15
Chunlong Sun, Hongtao Zhang, Wen Du, Baoqin Wang, Min Ji
OBJECTIVE: Methionine is a valid target for the treatment of cancer and to achieve in vivo imaging and early diagnosis of tumors, we have synthesized near-infrared (NIR) fluorochrome IR-822-labeled methionine (IR-822-Met). RESULTS: NIR fluorescent dye IR-822 was conjugated with methionine through its amide bond. It had low toxicity to normal cell/tissues. In vitro and in vivo studies demonstrated its high targeting capability to tumors. The results support the potential of using ligand-modified methionine probe for tumor diagnosis and targeted therapy...
January 3, 2017: Biotechnology Letters
https://www.readbyqxmd.com/read/28050265/synthetic-fluorophores-for-visualizing-biomolecules-in-living-systems
#16
V I Martynov, A A Pakhomov, N V Popova, I E Deyev, A G Petrenko
The last decade has witnessed significant advance in the imaging of living systems using fluorescent markers. This progress has been primarily associated with the discovery of different spectral variants of fluorescent proteins. However, the fluorescent protein technology has its own limitations and, in some cases, the use of low-molecular-weight fluorophores is preferable. In this review, we describe the arsenal of synthetic fluorescent tools that are currently in researchers' hands and span virtually the entire spectrum, from the UV to visible and, further, to the near-infrared region...
October 2016: Acta Naturae
https://www.readbyqxmd.com/read/28049064/nanoparticles-for-multi-modality-cancer-diagnosis-simple-protocol-for-self-assembly-of-gold-nanoclusters-mediated-by-gadolinium-ions
#17
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/28048306/we-fg-bra-04-a-portable-confocal-microscope-to-image-live-cell-damage-response-induced-by-therapeutic-radiation
#18
C McFadden, D Flint, D Sadetaporn, A Asaithamby, D Grosshans, G Sawakuchi
PURPOSE: To construct a custom and portable fluorescence confocal laser-scanning microscope (FCLSM) that can be placed in the path of therapeutic radiation beams to study real-time radiation-induced damage response in live cells. METHODS: We designed and constructed a portable FCLSM with three laser diodes for excitation (405, 488, and 635 nm). An objective lens focuses the excitation light and collects fluorescence from the sample. A pair of galvanometer mirrors scans/collects the laser beam/fluorescence along the focal plane (x/y-directions)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28045715/oncologic-procedures-amenable-to-fluorescence-guided-surgery
#19
Kiranya E Tipirneni, Jason M Warram, Lindsay S Moore, Andrew C Prince, Esther de Boer, Aditi H Jani, Irene L Wapnir, Joseph C Liao, Michael Bouvet, Nicole K Behnke, Mary T Hawn, George A Poultsides, Alexander L Vahrmeijer, William R Carroll, Kurt R Zinn, Eben Rosenthal
OBJECTIVE: Although fluorescence imaging is being applied to a wide range of cancers, it remains unclear which disease populations will benefit greatest. Therefore, we review the potential of this technology to improve outcomes in surgical oncology with attention to the various surgical procedures while exploring trial endpoints that may be optimal for each tumor type. BACKGROUND: For many tumors, primary treatment is surgical resection with negative margins, which corresponds to improved survival and a reduction in subsequent adjuvant therapies...
December 30, 2016: Annals of Surgery
https://www.readbyqxmd.com/read/28042324/mapping-sentinel-lymph-node-metastasis-by-dual-probe-optical-imaging
#20
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
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