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Bentahar S, Gómez-Gaviro MV, Desco M, Ripoll J, Fernández R. Multispectral imaging for characterizing autofluorescent tissues. Sci Rep 2024; 14:12084. [PMID: 38802477 PMCID: PMC11130125 DOI: 10.1038/s41598-024-61020-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 04/30/2024] [Indexed: 05/29/2024] Open
Abstract
Selective Plane Illumination Microscopy (SPIM) has become an emerging technology since its first application for 3D in-vivo imaging of the development of a living organism. An extensive number of works have been published, improving both the speed of acquisition and the resolution of the systems. Furthermore, multispectral imaging allows the effective separation of overlapping signals associated with different fluorophores from the spectrum over the whole field-of-view of the analyzed sample. To eliminate the need of using fluorescent dyes, this technique can also be applied to autofluorescence imaging. However, the effective separation of the overlapped spectra in autofluorescence imaging necessitates the use of mathematical tools. In this work, we explore the application of a method based on Principal Component Analysis (PCA) that enables tissue characterization upon spectral autofluorescence data without the use of fluorophores. Thus, enabling the separation of different tissue types in fixed and living samples with no need of staining techniques. Two procedures are described for acquiring spectral data, including a single excitation based method and a multi-excitation scanning approach. In both cases, we demonstrate the effective separation of various tissue types based on their unique autofluorescence spectra.
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Affiliation(s)
- Sara Bentahar
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain
| | | | - Manuel Desco
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, Spain
- Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - Jorge Ripoll
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain.
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.
| | - Roberto Fernández
- Departamento de Bioingeniería, Universidad Carlos III de Madrid, Madrid, Spain.
- Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de Alicante, Alicante, Spain.
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Stepanchuk AA, Stys PK. Spectral Fluorescence Pathology of Protein Misfolding Disorders. ACS Chem Neurosci 2024; 15:898-908. [PMID: 38407017 DOI: 10.1021/acschemneuro.3c00798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024] Open
Abstract
Protein misfolding has been extensively studied in the context of neurodegenerative disorders and systemic amyloidoses. Due to misfolding and aggregation of proteins being highly heterogeneous and generating a variety of structures, a growing body of evidence illustrates numerous ways how the aggregates contribute to progression of diseases such as Alzheimer's disease, Parkinson's disease, and prion disorders. Different misfolded species of the same protein, commonly referred to as strains, appear to play a significant role in shaping the disease clinical phenotype and clinical progression. The distinct toxicity profiles of various misfolded proteins underscore their importance. Current diagnostics struggle to differentiate among these strains early in the disease course. This review explores the potential of spectral fluorescence approaches to illuminate the complexities of protein misfolding pathology and discusses the applications of advanced spectral methods in the detection and characterization of protein misfolding disorders. By examining spectrally variable probes, current data analysis approaches, and important considerations for the use of these techniques, this review aims to provide an overview of the progress made in this field and highlights directions for future research.
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Affiliation(s)
- Anastasiia A Stepanchuk
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Peter K Stys
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada
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An J, Jangili P, Lim S, Kim YK, Verwilst P, Kim JS. Multichromatic fluorescence towards aberrant proteinaceous aggregates utilizing benzimidazole-based ICT fluorophores. J INCL PHENOM MACRO 2021. [DOI: 10.1007/s10847-021-01085-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ma L, Fei B. Comprehensive review of surgical microscopes: technology development and medical applications. JOURNAL OF BIOMEDICAL OPTICS 2021; 26:JBO-200292VRR. [PMID: 33398948 PMCID: PMC7780882 DOI: 10.1117/1.jbo.26.1.010901] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 12/04/2020] [Indexed: 05/06/2023]
Abstract
SIGNIFICANCE Surgical microscopes provide adjustable magnification, bright illumination, and clear visualization of the surgical field and have been increasingly used in operating rooms. State-of-the-art surgical microscopes are integrated with various imaging modalities, such as optical coherence tomography (OCT), fluorescence imaging, and augmented reality (AR) for image-guided surgery. AIM This comprehensive review is based on the literature of over 500 papers that cover the technology development and applications of surgical microscopy over the past century. The aim of this review is threefold: (i) providing a comprehensive technical overview of surgical microscopes, (ii) providing critical references for microscope selection and system development, and (iii) providing an overview of various medical applications. APPROACH More than 500 references were collected and reviewed. A timeline of important milestones during the evolution of surgical microscope is provided in this study. An in-depth technical overview of the optical system, mechanical system, illumination, visualization, and integration with advanced imaging modalities is provided. Various medical applications of surgical microscopes in neurosurgery and spine surgery, ophthalmic surgery, ear-nose-throat (ENT) surgery, endodontics, and plastic and reconstructive surgery are described. RESULTS Surgical microscopy has been significantly advanced in the technical aspects of high-end optics, bright and shadow-free illumination, stable and flexible mechanical design, and versatile visualization. New imaging modalities, such as hyperspectral imaging, OCT, fluorescence imaging, photoacoustic microscopy, and laser speckle contrast imaging, are being integrated with surgical microscopes. Advanced visualization and AR are being added to surgical microscopes as new features that are changing clinical practices in the operating room. CONCLUSIONS The combination of new imaging technologies and surgical microscopy will enable surgeons to perform challenging procedures and improve surgical outcomes. With advanced visualization and improved ergonomics, the surgical microscope has become a powerful tool in neurosurgery, spinal, ENT, ophthalmic, plastic and reconstructive surgeries.
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Affiliation(s)
- Ling Ma
- University of Texas at Dallas, Department of Bioengineering, Richardson, Texas, United States
| | - Baowei Fei
- University of Texas at Dallas, Department of Bioengineering, Richardson, Texas, United States
- University of Texas Southwestern Medical Center, Department of Radiology, Dallas, Texas, United States
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Ham NS, Myung SJ. Endoscopic molecular imaging in inflammatory bowel disease. Intest Res 2021; 19:33-44. [PMID: 32299156 PMCID: PMC7873406 DOI: 10.5217/ir.2019.09175] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 01/31/2020] [Indexed: 12/12/2022] Open
Abstract
Molecular imaging is a technique for imaging the processes occurring in a living body at a molecular level in real-time, combining molecular cell biology with advanced imaging technologies using molecular probes and fluorescence. Gastrointestinal endoscopic molecular imaging shows great promise for improving the identification of neoplasms, providing characterization for patient stratification and assessing the response to molecular targeted therapy. In inflammatory bowel disease, endoscopic molecular imaging can be used to assess disease severity and predict therapeutic response and prognosis. Endoscopic molecular imaging is also able to visualize dysplasia in the presence of background inflammation. Several preclinical and clinical trials have evaluated endoscopic molecular imaging; however, this area is just beginning to evolve, and many issues have not been solved yet. In the future, it is expected that endoscopic molecular imaging will be of increasing interest among clinicians as a new technology for the identification and evaluation of colorectal neoplasm and colitis-associated cancer.
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Affiliation(s)
- Nam Seok Ham
- Department of Gastroenterology, Veterans Health Service Medical Center, Seoul, Korea
| | - Seung-Jae Myung
- Department of Gastroenterology, Digestive Diseases Research Center, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- Correspondence to Seung-Jae Myung, Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 05505, Korea. Tel: +82-2-3010-3917, Fax: +82-2- 476-0824, E-mail:
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Kaur P, Choudhury D. Functionality of receptor targeted zinc-insulin quantum clusters in skin tissue augmentation and bioimaging. J Drug Target 2020; 29:541-550. [PMID: 33307859 DOI: 10.1080/1061186x.2020.1864740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Quantum clusters with target specificity are suitable for tissue-specific imaging. In the present work, amorphous zinc insulin quantum clusters (IZnQCs) had been synthesised to promote and monitor wound recovery. Easy synthesis, biocompatibility, stability, enhanced quantum yield, and solubility made the cluster suitable for preclinical/clinical exploration. Zn2+ is known for its binding to insulin hexamer. Here we report the reformation of the structure in a quantum cluster form in the presence of Zn2+. The formation of IZnQCs was confirmed by the change in zeta potential from -25.6 mV to -17.9 mV and also the formation of protein metal interaction was confirmed in FTIR bands at 450, 480, and 613 cm-1 for Zn-O, Zn-N, and Zn-S, respectively. HRTEM-EDS and SAED data analysis showed an amorphous nature of the cluster. The binding of IZnQCs to the cells has been confirmed using confocal microscopy. IZnQCs showed a synergistic effect in wound recovery than insulin or Zn2+ alone. Further due to high fluorescence this recovery process can be monitored under an appropriate setup. Wound healing promotional activity, target specificity, and fluorescence properties make the IZnQCs ideal to use for bioimaging along with promoting and monitoring of wound recovery agent.
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Affiliation(s)
- Pawandeep Kaur
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, India
| | - Diptiman Choudhury
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala, Punjab, India.,Thapar Institute of Engineering and Technology - Virginia Tech Centre for Excellence in Material Sciences, Thapar Institute of Engineering and Technology, Patiala, Punjab, India
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Zhou J, Jangili P, Son S, Ji MS, Won M, Kim JS. Fluorescent Diagnostic Probes in Neurodegenerative Diseases. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001945. [PMID: 32902000 DOI: 10.1002/adma.202001945] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/19/2020] [Indexed: 05/22/2023]
Abstract
Neurodegenerative diseases are debilitating disorders that feature progressive and selective loss of function or structure of anatomically or physiologically associated neuronal systems. Both chronic and acute neurodegenerative diseases are associated with high morbidity and mortality along with the death of neurons in different areas of the brain; moreover, there are few or no effective curative therapy options for treating these disorders. There is an urgent need to diagnose neurodegenerative disease as early as possible, and to distinguish between different disorders with overlapping symptoms that will help to decide the best clinical treatment. Recently, in neurodegenerative disease research, fluorescent-probe-mediated biomarker visualization techniques have been gaining increasing attention for the early diagnosis of neurodegenerative diseases. A survey of fluorescent probes for sensing and imaging biomarkers of neurodegenerative diseases is provided. These imaging probes are categorized based on the different potential biomarkers of various neurodegenerative diseases, and their advantages and disadvantages are discussed. Guides to develop new sensing strategies, recognition mechanisms, as well as the ideal features to further improve neurodegenerative disease fluorescence imaging are also explored.
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Affiliation(s)
- Jin Zhou
- College of Pharmacy, Weifang Medical University, Weifang, 261053, China
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
| | - Paramesh Jangili
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
| | - Subin Son
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
| | - Myung Sun Ji
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
| | - Miae Won
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
| | - Jong Seung Kim
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
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Clancy NT, Jones G, Maier-Hein L, Elson DS, Stoyanov D. Surgical spectral imaging. Med Image Anal 2020; 63:101699. [PMID: 32375102 PMCID: PMC7903143 DOI: 10.1016/j.media.2020.101699] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 03/30/2020] [Accepted: 04/06/2020] [Indexed: 12/24/2022]
Abstract
Recent technological developments have resulted in the availability of miniaturised spectral imaging sensors capable of operating in the multi- (MSI) and hyperspectral imaging (HSI) regimes. Simultaneous advances in image-processing techniques and artificial intelligence (AI), especially in machine learning and deep learning, have made these data-rich modalities highly attractive as a means of extracting biological information non-destructively. Surgery in particular is poised to benefit from this, as spectrally-resolved tissue optical properties can offer enhanced contrast as well as diagnostic and guidance information during interventions. This is particularly relevant for procedures where inherent contrast is low under standard white light visualisation. This review summarises recent work in surgical spectral imaging (SSI) techniques, taken from Pubmed, Google Scholar and arXiv searches spanning the period 2013-2019. New hardware, optimised for use in both open and minimally-invasive surgery (MIS), is described, and recent commercial activity is summarised. Computational approaches to extract spectral information from conventional colour images are reviewed, as tip-mounted cameras become more commonplace in MIS. Model-based and machine learning methods of data analysis are discussed in addition to simulation, phantom and clinical validation experiments. A wide variety of surgical pilot studies are reported but it is apparent that further work is needed to quantify the clinical value of MSI/HSI. The current trend toward data-driven analysis emphasises the importance of widely-available, standardised spectral imaging datasets, which will aid understanding of variability across organs and patients, and drive clinical translation.
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Affiliation(s)
- Neil T Clancy
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences (WEISS), University College London, United Kingdom; Centre for Medical Image Computing (CMIC), Department of Medical Physics and Biomedical Engineering, University College London, United Kingdom.
| | - Geoffrey Jones
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences (WEISS), University College London, United Kingdom; Centre for Medical Image Computing (CMIC), Department of Computer Science, University College London, United Kingdom
| | | | - Daniel S Elson
- Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation, Imperial College London, United Kingdom; Department of Surgery and Cancer, Imperial College London, United Kingdom
| | - Danail Stoyanov
- Wellcome/EPSRC Centre for Interventional and Surgical Sciences (WEISS), University College London, United Kingdom; Centre for Medical Image Computing (CMIC), Department of Computer Science, University College London, United Kingdom
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Zhou K, Yuan C, Dai B, Wang K, Chen Y, Ma D, Dai J, Liang Y, Tan H, Cui M. Environment-Sensitive Near-Infrared Probe for Fluorescent Discrimination of Aβ and Tau Fibrils in AD Brain. J Med Chem 2019; 62:6694-6704. [DOI: 10.1021/acs.jmedchem.9b00672] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Kaixiang Zhou
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Chang Yuan
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Bin Dai
- Hubei Key Laboratory of Cell Homeostasis, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Kan Wang
- Hubei Key Laboratory of Cell Homeostasis, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Yimin Chen
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Denglei Ma
- Department of Pharmacy, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Jiapei Dai
- Wuhan Institute for Neuroscience and Neuroengineering, South-Central University for Nationalities, Wuhan 430074, China
| | - Yi Liang
- Hubei Key Laboratory of Cell Homeostasis, State Key Laboratory of Virology, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Hongwei Tan
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Mengchao Cui
- Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
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A dual fluorescent reverse targeting drug delivery system based on curcumin-loaded ovalbumin nanoparticles for allergy treatment. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2019; 16:56-68. [DOI: 10.1016/j.nano.2018.11.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 11/02/2018] [Accepted: 11/26/2018] [Indexed: 02/07/2023]
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Deng Y, Xu A, Yu Y, Fu C, Liang G. Biomedical Applications of Fluorescent and Magnetic Resonance Imaging Dual‐Modality Probes. Chembiochem 2018; 20:499-510. [DOI: 10.1002/cbic.201800450] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Yun Deng
- Institute for Interdisciplinary & Research Key Laboratory of, Optoelectronic Chemical Materials and Devices of Ministry of EducationJianghan University Wuhan 430056 P.R. China
| | - Aifei Xu
- School of Tobacco Science and EngineeringZhengzhou University of Light Industry Zhengzhou 450002 P.R. China
| | - Yanhua Yu
- Institute for Interdisciplinary & Research Key Laboratory of, Optoelectronic Chemical Materials and Devices of Ministry of EducationJianghan University Wuhan 430056 P.R. China
| | - Cheng Fu
- Institute for Interdisciplinary & Research Key Laboratory of, Optoelectronic Chemical Materials and Devices of Ministry of EducationJianghan University Wuhan 430056 P.R. China
| | - Gaolin Liang
- CAS Key Laboratory of Soft Matter ChemistryDepartment of ChemistryUniversity of Science and Technology of China Hefei 230026 P.R. China
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Bae SM, Bae DJ, Do EJ, Oh G, Yoo SW, Lee GJ, Chae JS, Yun Y, Kim S, Kim KH, Chung E, Kim JK, Hwang SW, Park SH, Yang DH, Ye BD, Byeon JS, Yang SK, Joo J, Kim SY, Myung SJ. Multi-Spectral Fluorescence Imaging of Colon Dysplasia InVivo Using a Multi-Spectral Endoscopy System. Transl Oncol 2018; 12:226-235. [PMID: 30419540 PMCID: PMC6231290 DOI: 10.1016/j.tranon.2018.10.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 10/07/2018] [Accepted: 10/11/2018] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND AND STUDY AIM: To develop a molecular imaging endoscopic system that eliminates tissue autofluorescence and distinguishes multiple fluorescent markers specifically on the cancerous lesions. METHODS: Newly developed multi-spectral fluorescence endoscope device has the potential to eliminate signal interference due to autofluorescence and multiplex fluorophores in fluorescent probes. The multiplexing capability of the multi-spectral endoscope device was demonstrated in the phantom studies and multi-spectral imaging with endoscopy and macroscopy was performed to analyze fluorescence signals after administration of fluorescent probe that targets cancer in the colon. Because of the limitations in the clinical application using rigid-type small animal endoscope, we developed a flexible channel insert-type fluorescence endoscope, which was validated on the colonoscopy of dummy and porcine model. RESULTS: We measured multiple fluorescent signals simultaneously, and the fluorescence spectra were unmixed to separate the fluorescent signals of each probe, in which multiple fluorescent probes clearly revealed spectral deconvolution at the specific targeting area in the mouse colon. The positive area of fluorescence signal for each probe over the whole polyp was segmented with analyzing software, and showed distinctive patterns and significantly distinguishable values: 0.46 ± 0.04, 0.39 ± 0.08 and 0.73 ± 0.12 for HMRG, CET-553 and TRA-675 probes, respectively. The spectral unmixing was finally demonstrated in the dummy and porcine model, corroborating the targeted multi-spectral fluorescence imaging of colon dysplasia. CONCLUSION: The multi-spectral endoscopy system may allow endoscopists to clearly identify cancerous lesion that has different patterns of various target expression using multiple fluorescent probes.
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Affiliation(s)
- Sang Mun Bae
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea; Department of Medicine, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Dong-Jun Bae
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Eun-Ju Do
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Gyungseok Oh
- School of Mechanical Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea
| | - Su Woong Yoo
- Department of Biomedical Science and Engineering, Institute of Integrated Technology (IIT), Gwangju, Institute of Science and Technology, Gwangju 61005, South Korea
| | - Gil-Je Lee
- Discovery and Analytic Solution, PerkinElmer Korea, Seoul 08380, South Korea
| | - Ji Soo Chae
- Discovery and Analytic Solution, PerkinElmer Korea, Seoul 08380, South Korea
| | - Youngkuk Yun
- Discovery and Analytic Solution, PerkinElmer Korea, Seoul 08380, South Korea
| | - Sungjee Kim
- Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, South Korea
| | - Ki Hean Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 790-784, South Korea
| | - Euiheon Chung
- School of Mechanical Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, South Korea; Department of Biomedical Science and Engineering, Institute of Integrated Technology (IIT), Gwangju, Institute of Science and Technology, Gwangju 61005, South Korea
| | - Jun Ki Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Sung Wook Hwang
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Sang Hyoung Park
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Dong-Hoon Yang
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Byong Duk Ye
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Jeong-Sik Byeon
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Suk-Kyun Yang
- Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Jinmyoung Joo
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea; Department of Gastroenterology and Convergence Medicine, University of Ulsan College of Medicine, Seoul 138-736, South Korea
| | - Sang-Yeob Kim
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea; Department of Gastroenterology and Convergence Medicine, University of Ulsan College of Medicine, Seoul 138-736, South Korea.
| | - Seung-Jae Myung
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea; Department of Gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 138-736, South Korea; Department of Gastroenterology and Convergence Medicine, University of Ulsan College of Medicine, Seoul 138-736, South Korea.
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Structural Behavior of the Endothelial Glycocalyx Is Associated With Pathophysiologic Status in Septic Mice: An Integrated Approach to Analyzing the Behavior and Function of the Glycocalyx Using Both Electron and Fluorescence Intravital Microscopy. Anesth Analg 2017; 125:874-883. [PMID: 28504989 DOI: 10.1213/ane.0000000000002057] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND The endothelial surface layer (ESL) regulates vascular permeability to maintain fluid homeostasis. The glycocalyx (GCX), which has a complex and fragile ultrastructure, is an important component of the ESL. Abnormalities of the GCX have been hypothesized to trigger pathological hyperpermeability. Here, we report an integrated in vivo analysis of the morphological and functional properties of the GCX in a vital organ. METHODS We examined the behavior of the ESL and GCX, using both electron microscopy (EM) and intravital microscopy (IVM). We also compared morphological changes in the ESL of mouse skin in a glycosidase-treated and control group. Combined approaches were also used to examine both morphology and function in a lipopolysaccharide-induced septic model and the pathophysiological features of leukocyte-endothelial interactions and in vivo vascular permeability. RESULTS Using IVM, we identified an illuminated part of the ESL as the GCX and confirmed our observation using morphological and biochemical means. In septic mice, we found that the GCX was thinner than in nonseptic controls in both an EM image analysis (0.98 ± 2.08 nm vs 70.68 ± 36.36 nm, P< .001) and an IVM image analysis (0.36 ± 0.15 μm vs 1.07 ± 0.39 μm, P< .001). Under septic conditions, syndecan-1, a representative core protein of the GCX, was released into the blood serum at a higher rate in septic animals (7.33 ± 3.46 ng/mL) when compared with controls (below the limit of detection, P< .001). Significant increases in leukocyte-endothelial interactions, defined as the numbers of rolling or firm-sticking leukocytes, and molecular hyperpermeability to the interstitium were also observed after GCX shedding in vivo. CONCLUSIONS Using IVM, we visualized an illuminated part of the ESL layer that was subsequently confirmed as the GCX using EM. Severe sepsis induced morphological degradation of the GCX, accompanied by shedding of the syndecan-1 core protein and an increase in leukocyte-endothelial interactions affecting the vascular permeability. Our in vivo model describes a new approach to deciphering the relationship between structural and functional behaviors of the GCX.
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Wang YW, Reder NP, Kang S, Glaser AK, Liu JTC. Multiplexed Optical Imaging of Tumor-Directed Nanoparticles: A Review of Imaging Systems and Approaches. Nanotheranostics 2017; 1:369-388. [PMID: 29071200 PMCID: PMC5647764 DOI: 10.7150/ntno.21136] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 07/08/2017] [Indexed: 12/18/2022] Open
Abstract
In recent decades, various classes of nanoparticles have been developed for optical imaging of cancers. Many of these nanoparticles are designed to specifically target tumor sites, and specific cancer biomarkers, to facilitate the visualization of tumors. However, one challenge for accurate detection of tumors is that the molecular profiles of most cancers vary greatly between patients as well as spatially and temporally within a single tumor mass. To overcome this challenge, certain nanoparticles and imaging systems have been developed to enable multiplexed imaging of large panels of cancer biomarkers. Multiplexed molecular imaging can potentially enable sensitive tumor detection, precise delineation of tumors during interventional procedures, and the prediction/monitoring of therapy response. In this review, we summarize recent advances in systems that have been developed for the imaging of optical nanoparticles that can be heavily multiplexed, which include surface-enhanced Raman-scattering nanoparticles (SERS NPs) and quantum dots (QDs). In addition to surveying the optical properties of these various types of nanoparticles, and the most-popular multiplexed imaging approaches that have been employed, representative preclinical and clinical imaging studies are also highlighted.
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Affiliation(s)
- Yu Winston Wang
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
| | - Nicholas P Reder
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA.,Department of Pathology, University of Washington School of Medicine, Seattle, WA 98195, USA
| | - Soyoung Kang
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
| | - Adam K Glaser
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
| | - Jonathan T C Liu
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
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15
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Dong X, Chen H, Qin J, Wei C, Liang J, Liu T, Kong D, Lv F. Thermosensitive porphyrin-incorporated hydrogel with four-arm PEG-PCL copolymer (II): doxorubicin loaded hydrogel as a dual fluorescent drug delivery system for simultaneous imaging tracking in vivo. Drug Deliv 2017; 24:641-650. [PMID: 28282993 PMCID: PMC8241078 DOI: 10.1080/10717544.2017.1289570] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Visualization of a drug delivery system could reveal the pharmacokinetic properties, which is essential for the design of a novel drug delivery system. In vivo optical imaging offers an advanced tool to monitor the drug release process and the therapeutic effect by the combination of fluorescence imaging and bioluminescence imaging. Multispectral fluorescence imaging can separate the drug and the carrier without interference. Herein, a dual fluorescent anti-tumor drug delivery system was monitored with the doxorubicin-loaded hydrogel to further explore the application of the porphyrin-incorporated hydrogel with four-arm PEG-PCL copolymer as a drug carrier, based on the beneficial fluorescence and good biocompatibility of the porphyrin incorporated hydrogel. Using nude mice bearing luciferase expressed hepatic tumor as models, the whole process from the drug delivery to the tumor therapeutic effects were real time visualized simultaneously after administration at interval from 0 to 18 d. The imaging results suggest that the fluorescence signals of the drug and the carrier can be separated and unmixed from the drug-loaded hydrogel successfully, avoiding the interference of the fluorescence signals. The tumor growth or inhibition can be real time tracked and analyzed quantitatively by bioluminescence imaging. Noninvasive continuous tracking the in vivo drug delivery process simultaneously is a potential trend for the precise drug delivery and treatment.
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Affiliation(s)
- Xia Dong
- a Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College , Tianjin , PR China and
| | - Hongli Chen
- b School of Life Science and Technology, Xinxiang Medical University , Xinxiang , Henan , PR China
| | - Jingwen Qin
- b School of Life Science and Technology, Xinxiang Medical University , Xinxiang , Henan , PR China
| | - Chang Wei
- a Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College , Tianjin , PR China and
| | - Jie Liang
- a Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College , Tianjin , PR China and
| | - Tianjun Liu
- a Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College , Tianjin , PR China and
| | - Deling Kong
- a Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College , Tianjin , PR China and
| | - Feng Lv
- a Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College , Tianjin , PR China and
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16
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Liang J, Dong X, Wei C, Kong D, Liu T, Lv F. Phthalocyanine incorporated alginate hydrogel with near infrared fluorescence for non-invasive imaging monitoring in vivo. RSC Adv 2017. [DOI: 10.1039/c6ra27756j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A phthalocyanine incorporated alginate hydrogel with rhodamine was monitored by fluorescence imaging as a dual fluorescent drug delivery system.
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Affiliation(s)
- Jie Liang
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
| | - Xia Dong
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
| | - Chang Wei
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
| | - Deling Kong
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
| | - Tianjun Liu
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
| | - Feng Lv
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
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17
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Harmany ZT, Fereidouni F, Levenson RM. Spectral Unmixing Methods and Tools for the Detection and Quantitation of Collagen and Other Macromolecules in Tissue Specimens. Methods Mol Biol 2017; 1627:491-509. [PMID: 28836220 DOI: 10.1007/978-1-4939-7113-8_30] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Collagen and other components in the extracellular matrix are proving of increasing importance for the understanding of complex cell and tissue interactions in a variety of settings. Detection and quantitation of these components can still prove challenging, and a number of techniques have been developed. We focus here on methods in fluorescence-based assessments, including multiplexed immunodetection and the use of simpler histochemical stains, both complemented by linear unmixing techniques. Typically, differentiating these components requires the use of a set of optical filters to isolate each fluorescent compound from each other and from often bright background autofluorescence signals. However, standard fluorescent microscopes are usually only able to separate a limited number of components. If the emission spectra of the fluorophores are spectrally distinct, but overlapping, sophisticated spectral imaging or computational methods can be used to optimize separation and quantitation. This chapter describes spectral unmixing methodology and associated open-source software tools available to analyze multispectral as well as simple color (RGB) images.
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Affiliation(s)
- Zachary T Harmany
- Department of Pathology and Laboratory Medicine, University of California-Davis Medical Center, Sacramento, CA, USA.
| | - Farzad Fereidouni
- Department of Pathology and Laboratory Medicine, University of California-Davis Medical Center, Sacramento, CA, USA
| | - Richard M Levenson
- Department of Pathology and Laboratory Medicine, University of California-Davis Medical Center, Sacramento, CA, USA
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18
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Matthew EM, Zhou L, Yang Z, Dicker DT, Holder SL, Lim B, Harouaka R, Zheng SY, Drabick JJ, Lamparella NE, Truica CI, El-Deiry WS. A multiplexed marker-based algorithm for diagnosis of carcinoma of unknown primary using circulating tumor cells. Oncotarget 2016; 7:3662-76. [PMID: 26695546 PMCID: PMC4826160 DOI: 10.18632/oncotarget.6657] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Accepted: 11/23/2015] [Indexed: 02/07/2023] Open
Abstract
Real-time, single-cell multiplex immunophenotyping of circulating tumor cells (CTCs) is hypothesized to inform diagnosis of tissue of origin in patients with carcinoma of unknown primary (CUP). In 20 to 50% of CUP patients, the primary site remains unidentified, presenting a challenge for clinicians in diagnosis and treatment. We developed a post-CellSearch CTC assay using multiplexed Q-dot or DyLight conjugated antibodies with the goal of detecting multiple markers in single cells within a CTC population. We adapted our approach to size-based CTC enrichment protocols for capturing CTCs and subsequent immunofluorescence (IF) using a minimal set of markers to predict the primary sites for common metastatic tumors. The carcinomas are characterized with cytokeratin 7 (CK7), cytokeratin 20 (CK20), thyroid transcription factor 1 (TTF-1), estrogen receptor (ER) or prostate-specific antigen (PSA. IF has been optimized in cultured tumor cells with individual antibodies, then with conjugated antibodies to form a multiplex antibody set. With IF, we evaluated antibodies specific to these 5 markers in lung, breast, colorectal, and prostate cancer cell lines and blood from metastatic prostate and breast cancer patients. This advanced technology provides a noninvasive, diagnostic blood test as an adjunct to routine tissue biopsy. Its further implementation requires prospective clinical testing.
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Affiliation(s)
- Elizabeth M Matthew
- Laboratory of Translational Oncology and Experimental Cancer Therapeutics, Division of Hematology-Oncology, Penn State Hershey Cancer Institute, Hershey, PA, USA.,Laboratory of Translational Oncology and Experimental Cancer Therapeutics, Department of Medical Oncology and Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Lanlan Zhou
- Laboratory of Translational Oncology and Experimental Cancer Therapeutics, Division of Hematology-Oncology, Penn State Hershey Cancer Institute, Hershey, PA, USA.,Laboratory of Translational Oncology and Experimental Cancer Therapeutics, Department of Medical Oncology and Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Zhaohai Yang
- Department of Pathology, Penn State Milton S. Hershey Medical Center, Hershey, PA, USA
| | - David T Dicker
- Laboratory of Translational Oncology and Experimental Cancer Therapeutics, Division of Hematology-Oncology, Penn State Hershey Cancer Institute, Hershey, PA, USA.,Laboratory of Translational Oncology and Experimental Cancer Therapeutics, Department of Medical Oncology and Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
| | - Sheldon L Holder
- Division of Hematology-Oncology, Penn State Milton S. Hershey Medical Center and Penn State Hershey Cancer Institute, Hershey, PA, USA
| | - Bora Lim
- Laboratory of Translational Oncology and Experimental Cancer Therapeutics, Division of Hematology-Oncology, Penn State Hershey Cancer Institute, Hershey, PA, USA.,Division of Hematology-Oncology, Penn State Milton S. Hershey Medical Center and Penn State Hershey Cancer Institute, Hershey, PA, USA.,The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Ramdane Harouaka
- Department of Biomedical Engineering, Penn State University, University Park, PA, USA
| | - Si-Yang Zheng
- Department of Biomedical Engineering, Penn State University, University Park, PA, USA
| | - Joseph J Drabick
- Division of Hematology-Oncology, Penn State Milton S. Hershey Medical Center and Penn State Hershey Cancer Institute, Hershey, PA, USA
| | - Nicholas E Lamparella
- Division of Hematology-Oncology, Penn State Milton S. Hershey Medical Center and Penn State Hershey Cancer Institute, Hershey, PA, USA
| | - Cristina I Truica
- Division of Hematology-Oncology, Penn State Milton S. Hershey Medical Center and Penn State Hershey Cancer Institute, Hershey, PA, USA
| | - Wafik S El-Deiry
- Laboratory of Translational Oncology and Experimental Cancer Therapeutics, Division of Hematology-Oncology, Penn State Hershey Cancer Institute, Hershey, PA, USA.,Laboratory of Translational Oncology and Experimental Cancer Therapeutics, Department of Medical Oncology and Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, PA, USA
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19
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Dobosz M, Haupt U, Scheuer W. Improved decision making for prioritizing tumor targeting antibodies in human xenografts: Utility of fluorescence imaging to verify tumor target expression, antibody binding and optimization of dosage and application schedule. MAbs 2016; 9:140-153. [PMID: 27661454 DOI: 10.1080/19420862.2016.1238996] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Preclinical efficacy studies of antibodies targeting a tumor-associated antigen are only justified when the expression of the relevant antigen has been demonstrated. Conventionally, antigen expression level is examined by immunohistochemistry of formalin-fixed paraffin-embedded tumor tissue section. This method represents the diagnostic "gold standard" for tumor target evaluation, but is affected by a number of factors, such as epitope masking and insufficient antigen retrieval. As a consequence, variances and discrepancies in histological staining results can occur, which may influence decision-making and therapeutic outcome. To overcome these problems, we have used different fluorescence-labeled therapeutic antibodies targeting human epidermal growth factor receptor (HER) family members and insulin-like growth factor-1 receptor (IGF1R) in combination with fluorescence imaging modalities to determine tumor antigen expression, drug-target interaction, and biodistribution and tumor saturation kinetics in non-small cell lung cancer xenografts. For this, whole-body fluorescence intensities of labeled antibodies, applied as a single compound or antibody mixture, were measured in Calu-1 and Calu-3 tumor-bearing mice, then ex vivo multispectral tumor tissue analysis at microscopic resolution was performed. With the aid of this simple and fast imaging method, we were able to analyze the tumor cell receptor status of HER1-3 and IGF1R, monitor the antibody-target interaction and evaluate the receptor binding sites of anti-HER2-targeting antibodies. Based on this, the most suitable tumor model, best therapeutic antibody, and optimal treatment dosage and application schedule was selected. Predictions drawn from obtained imaging data were in excellent concordance with outcome of conducted preclinical efficacy studies. Our results clearly demonstrate the great potential of combined in vivo and ex vivo fluorescence imaging for the preclinical development and characterization of monoclonal antibodies.
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Affiliation(s)
- Michael Dobosz
- a Discovery Oncology, Pharmaceutical Research and Early Development, Roche Innovation Center Munich , Penzberg , Germany
| | - Ute Haupt
- a Discovery Oncology, Pharmaceutical Research and Early Development, Roche Innovation Center Munich , Penzberg , Germany
| | - Werner Scheuer
- a Discovery Oncology, Pharmaceutical Research and Early Development, Roche Innovation Center Munich , Penzberg , Germany
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20
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Dong X, Wei C, Chen H, Qin J, Liang J, Kong D, Liu T, Lv F. Real-Time Imaging Tracking of a Dual Fluorescent Drug Delivery System Based on Zinc Phthalocyanine-Incorporated Hydrogel. ACS Biomater Sci Eng 2016; 2:2001-2010. [DOI: 10.1021/acsbiomaterials.6b00403] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Xia Dong
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, PR China
| | - Chang Wei
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, PR China
| | - Hongli Chen
- School
of Life Science and Technology, Xinxiang Medical University, Xinxiang, Henan, 453003, PR China
| | - Jingwen Qin
- School
of Life Science and Technology, Xinxiang Medical University, Xinxiang, Henan, 453003, PR China
| | - Jie Liang
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, PR China
| | - Deling Kong
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, PR China
| | - Tianjun Liu
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, PR China
| | - Feng Lv
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, PR China
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21
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Dong X, Wei C, Liu T, Lv F, Qian Z. Real-Time Fluorescence Tracking of Protoporphyrin Incorporated Thermosensitive Hydrogel and Its Drug Release in Vivo. ACS APPLIED MATERIALS & INTERFACES 2016; 8:5104-13. [PMID: 26848506 DOI: 10.1021/acsami.5b11493] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xia Dong
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People’s Republic of China
| | - Chang Wei
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People’s Republic of China
| | - Tianjun Liu
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People’s Republic of China
| | - Feng Lv
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People’s Republic of China
| | - Zhiyong Qian
- State Key Laboratory of Biotherapy/Collaborative Innovation
Center for Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, People’s Republic of China
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22
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Paproski RJ, Li Y, Barber Q, Lewis JD, Campbell RE, Zemp R. Validating tyrosinase homologue melA as a photoacoustic reporter gene for imaging Escherichia coli. JOURNAL OF BIOMEDICAL OPTICS 2015; 20:106008. [PMID: 26502231 DOI: 10.1117/1.jbo.20.10.106008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 09/22/2015] [Indexed: 06/05/2023]
Abstract
To understand the pathogenic processes for infectious bacteria, appropriate research tools are required for replicating and characterizing infections. Fluorescence and bioluminescence imaging have primarily been used to image infections in animal models, but optical scattering in tissue significantly limits imaging depth and resolution. Photoacoustic imaging, which has improved depth-to-resolution ratio compared to conventional optical imaging, could be useful for visualizing melA-expressing bacteria since melA is a bacterial tyrosinase homologue which produces melanin. Escherichia coli-expressing melA was visibly dark in liquid culture. When melA-expressing bacteria in tubes were imaged with a VisualSonics Vevo LAZR system, the signal-to-noise ratio of a 9×dilution sample was 55, suggesting that ∼20 bacteria cells could be detected with our system. Multispectral (680, 700, 750, 800, 850, and 900 nm) analysis of the photoacoustic signal allowed unmixing of melA-expressing bacteria from blood. To compare photoacoustic reporter gene melA (using Vevo system) with luminescent and fluorescent reporter gene Nano-lantern (using Bruker Xtreme In-Vivo system), tubes of bacteria expressing melA or Nano-lantern were submerged 10 mm in 1% Intralipid, spaced between <1 and 20 mm apart from each other, and imaged with the appropriate imaging modality. Photoacoustic imaging could resolve the two tubes of melA-expressing bacteria even when the tubes were less than 1 mm from each other, while bioluminescence and fluorescence imaging could not resolve the two tubes of Nano-lantern-expressing bacteria even when the tubes were spaced 10 mm from each other. After injecting 100-μL of melA-expressing bacteria in the back flank of a chicken embryo, photoacoustic imaging allowed visualization of melA-expressing bacteria up to 10-mm deep into the embryo. Photoacoustic signal from melA could also be separated from deoxy- and oxy-hemoglobin signal observed within the embryo and chorioallantoic membrane. Our results suggest that melA is a useful photoacoustic reporter gene for visualizing bacteria, and further work incorporating photoacoustic reporters into infectious bacterial strains is warranted.
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Affiliation(s)
- Robert J Paproski
- University of Alberta, Department of Electrical and Computer Engineering, Donadeo Innovation Centre for Engineering, 9211-116 Street, Edmonton, Alberta T6G 1H9, CanadabUniversity of Alberta, Department of Oncology, Katz Group Centre, 114 Street & 87 Avenu
| | - Yan Li
- University of Alberta, Department of Chemistry, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Quinn Barber
- University of Alberta, Department of Electrical and Computer Engineering, Donadeo Innovation Centre for Engineering, 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - John D Lewis
- University of Alberta, Department of Oncology, Katz Group Centre, 114 Street & 87 Avenue, Edmonton, Alberta T6G 2E1, Canada
| | - Robert E Campbell
- University of Alberta, Department of Chemistry, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Roger Zemp
- University of Alberta, Department of Electrical and Computer Engineering, Donadeo Innovation Centre for Engineering, 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
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23
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Bajwa N, Mehra NK, Jain K, Jain NK. Pharmaceutical and biomedical applications of quantum dots. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2015; 44:758-68. [PMID: 26058404 DOI: 10.3109/21691401.2015.1052468] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Quantum dots (QDs) have captured the fascination and attention of scientists due to their simultaneous targeting and imaging potential in drug delivery, in pharmaceutical and biomedical applications. In the present study, we have exhaustively reviewed various aspects of QDs, highlighting their pharmaceutical and biomedical applications, pharmacology, interactions, and toxicological manifestations. The eventual use of QDs is to dramatically improve clinical diagnostic tests for early detection of cancer. In recent years, QDs were introduced to cell biology as an alternative fluorescent probe.
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Affiliation(s)
- Neha Bajwa
- a Department of Pharmaceutics , Pharmaceutical Nanotechnology Research Laboratory, ISF College of Pharmacy , Moga , Punjab , India
| | - Neelesh K Mehra
- a Department of Pharmaceutics , Pharmaceutical Nanotechnology Research Laboratory, ISF College of Pharmacy , Moga , Punjab , India
| | - Keerti Jain
- a Department of Pharmaceutics , Pharmaceutical Nanotechnology Research Laboratory, ISF College of Pharmacy , Moga , Punjab , India
| | - Narendra K Jain
- a Department of Pharmaceutics , Pharmaceutical Nanotechnology Research Laboratory, ISF College of Pharmacy , Moga , Punjab , India
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24
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A framework for optimal kernel-based manifold embedding of medical image data. Comput Med Imaging Graph 2015; 41:93-107. [DOI: 10.1016/j.compmedimag.2014.06.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 04/16/2014] [Accepted: 06/01/2014] [Indexed: 11/17/2022]
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25
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Quantitative detection of drug dose and spatial distribution in the lung revealed by Cryoslicing Imaging. J Pharm Biomed Anal 2015; 102:129-36. [DOI: 10.1016/j.jpba.2014.09.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 08/06/2014] [Accepted: 09/01/2014] [Indexed: 12/21/2022]
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26
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Dong X, Wei C, Liu T, Lv F. Protoporphyrin incorporated alginate hydrogel: preparation, characterization and fluorescence imaging in vivo. RSC Adv 2015. [DOI: 10.1039/c5ra19285d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A protoporphyrin incorporated alginate hydrogel exhibits the fluorescence ability to locate a drug and carrier with multispectral fluorescence imaging in vivo.
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Affiliation(s)
- Xia Dong
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
| | - Chang Wei
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
| | - Tianjun Liu
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
| | - Feng Lv
- Tianjin Key Laboratory of Biomedical Materials
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences & Peking Union Medical College
- Tianjin 300192
- PR China
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27
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Mashinchian O, Johari-Ahar M, Ghaemi B, Rashidi M, Barar J, Omidi Y. Impacts of quantum dots in molecular detection and bioimaging of cancer. ACTA ACUST UNITED AC 2014; 4:149-66. [PMID: 25337468 PMCID: PMC4204040 DOI: 10.15171/bi.2014.008] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 06/02/2014] [Accepted: 09/21/2014] [Indexed: 12/20/2022]
Abstract
Introduction: A number of assays have so far been exploited for detection of cancer biomarkers in various malignancies. However, the expression of cancer biomarker(s) appears to be extremely low, therefore accurate detection demands sensitive optical imaging probes. While optical detection using conventional fluorophores often fail due to photobleaching problems, quantum dots (QDs) offer stable optical imaging in vitro and in vivo.
Methods: In this review, we briefly overview the impacts of QDs in biology and its applications in bioimaging of malignancies. We will also delineate the existing obstacles for early detection of cancer and the intensifying use of QDs in advancement of diagnostic devices.
Results: Of the QDs, unlike the II-VI type QDs (e.g., cadmium (Cd), selenium (Se) or tellurium (Te)) that possess inherent cytotoxicity, the I-III-VI 2 type QDs (e.g., AgInS2, CuInS2, ZnS-AgInS2) appear to be less toxic bioimaging agents with better control of band-gap energies. As highly-sensitive bioimaging probes, advanced hybrid QDs (e.g., QD-QD, fluorochrome-QD conjugates used for sensing through fluorescence resonance energy transfer (FRET), quenching, and barcoding techniques) have also been harnessed for the detection of biomarkers and the monitoring of delivery of drugs/genes to the target sites. Antibody-QD (Ab-QD) and aptamer- QD (Ap-QD) bioconjugates, once target the relevant biomarker, can provide highly stable photoluminescence (PL) at the target sites. In addition to their potential as nanobiosensors, the bioconjugates of QDs with homing devices have successfully been used for the development of smart nanosystems (NSs) providing targeted bioimaging and photodynamic therapy (PDT).
Conclusion: Having possessed great deal of photonic characteristics, QDs can be used for development of seamless multifunctional nanomedicines, theranostics and nanobiosensors.
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Affiliation(s)
- Omid Mashinchian
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran ; Department of Medical Nanotechnology, School of Advanced Technologies in Medicine (SATiM), Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Johari-Ahar
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Behnaz Ghaemi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine (SATiM), Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Rashidi
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran ; Department of Photonics, School of Engineering-Emerging Technology, University of Tabriz, Tabriz, Iran
| | - Jaleh Barar
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yadollah Omidi
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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28
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Alexander VM, Choyke PL, Kobayashi H. Fluorescent molecular imaging: technical progress and current preclinical and clinical applications in urogynecologic diseases. Curr Mol Med 2013; 13:1568-78. [PMID: 24206135 DOI: 10.2174/1566524013666131111125758] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2012] [Revised: 05/18/2012] [Accepted: 09/10/2013] [Indexed: 02/02/2023]
Abstract
Many molecular imaging probes have been developed in recent years that hold great promise for both diagnostic and therapeutic functions in urogynecologic disease. Historically, optical probe designs were based on either endogenous or exogenous fluorophores. More recently, organic fluorophore probes have been engineered to target specific tissues and emit fluorescence only upon binding to targets. Several different photochemical mechanisms of activation exist. This review presents a discussion of the history and development of molecular imaging probe designs and provides an overview of successful preclinical and clinical models employing molecular probes for in vivo imaging of urogynecologic cancers.
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Affiliation(s)
- V M Alexander
- Molecular Imaging Program, NCI/NIH, Building 10, Room B3B69, MSC 1088, Bethesda, Maryland 20892-1088, USA.
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Clancy NT, Stoyanov D, James DRC, Di Marco A, Sauvage V, Clark J, Yang GZ, Elson DS. Multispectral image alignment using a three channel endoscope in vivo during minimally invasive surgery. BIOMEDICAL OPTICS EXPRESS 2012; 3:2567-78. [PMID: 23082296 PMCID: PMC3469985 DOI: 10.1364/boe.3.002567] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 09/07/2012] [Accepted: 09/11/2012] [Indexed: 05/11/2023]
Abstract
Sequential multispectral imaging is an acquisition technique that involves collecting images of a target at different wavelengths, to compile a spectrum for each pixel. In surgical applications it suffers from low illumination levels and motion artefacts. A three-channel rigid endoscope system has been developed that allows simultaneous recording of stereoscopic and multispectral images. Salient features on the tissue surface may be tracked during the acquisition in the stereo cameras and, using multiple camera triangulation techniques, this information used to align the multispectral images automatically even though the tissue or camera is moving. This paper describes a detailed validation of the set-up in a controlled experiment before presenting the first in vivo use of the device in a porcine minimally invasive surgical procedure. Multispectral images of the large bowel were acquired and used to extract the relative concentration of haemoglobin in the tissue despite motion due to breathing during the acquisition. Using the stereoscopic information it was also possible to overlay the multispectral information on the reconstructed 3D surface. This experiment demonstrates the ability of this system for measuring blood perfusion changes in the tissue during surgery and its potential use as a platform for other sequential imaging modalities.
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Affiliation(s)
- Neil T. Clancy
- Hamlyn Centre for Robotic Surgery, Institute of Global Health
Innovation, Imperial College London, SW7 2AZ, UK
- Department of Surgery and Cancer, Imperial College London, SW7
2AZ, UK
| | - Danail Stoyanov
- Centre for Medical Image Computing, Department of Computer
Science, University College London, WC1E 6BT, UK
| | - David R. C. James
- Hamlyn Centre for Robotic Surgery, Institute of Global Health
Innovation, Imperial College London, SW7 2AZ, UK
- Department of Surgery and Cancer, Imperial College London, SW7
2AZ, UK
| | - Aimee Di Marco
- Hamlyn Centre for Robotic Surgery, Institute of Global Health
Innovation, Imperial College London, SW7 2AZ, UK
- Department of Surgery and Cancer, Imperial College London, SW7
2AZ, UK
| | - Vincent Sauvage
- Hamlyn Centre for Robotic Surgery, Institute of Global Health
Innovation, Imperial College London, SW7 2AZ, UK
- Department of Surgery and Cancer, Imperial College London, SW7
2AZ, UK
| | - James Clark
- Hamlyn Centre for Robotic Surgery, Institute of Global Health
Innovation, Imperial College London, SW7 2AZ, UK
- Department of Surgery and Cancer, Imperial College London, SW7
2AZ, UK
| | - Guang-Zhong Yang
- Hamlyn Centre for Robotic Surgery, Institute of Global Health
Innovation, Imperial College London, SW7 2AZ, UK
- Department of Computing, Imperial College London, SW7 2AZ,
UK
| | - Daniel S. Elson
- Hamlyn Centre for Robotic Surgery, Institute of Global Health
Innovation, Imperial College London, SW7 2AZ, UK
- Department of Surgery and Cancer, Imperial College London, SW7
2AZ, UK
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30
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Han S, Mu Y, Zhu Q, Gao Y, Li Z, Jin Q, Jin W. Au:CdHgTe quantum dots for in vivo tumor-targeted multispectral fluorescence imaging. Anal Bioanal Chem 2012; 403:1343-52. [DOI: 10.1007/s00216-012-5921-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2011] [Revised: 02/24/2012] [Accepted: 02/29/2012] [Indexed: 12/01/2022]
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Rahmim A, Zhou Y, Tang J, Lu L, Sossi V, Wong DF. Direct 4D parametric imaging for linearized models of reversibly binding PET tracers using generalized AB-EM reconstruction. Phys Med Biol 2012; 57:733-55. [PMID: 22252120 DOI: 10.1088/0031-9155/57/3/733] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Due to high noise levels in the voxel kinetics, development of reliable parametric imaging algorithms remains one of most active areas in dynamic brain PET imaging, which in the vast majority of cases involves receptor/transporter studies with reversibly binding tracers. As such, the focus of this work has been to develop a novel direct 4D parametric image reconstruction scheme for such tracers. Based on a relative equilibrium (RE) graphical analysis formulation (Zhou et al 2009b Neuroimage 44 661-70), we developed a closed-form 4D EM algorithm to directly reconstruct distribution volume (DV) parametric images within a plasma input model, as well as DV ratio (DVR) images within a reference tissue model scheme (wherein an initial reconstruction was used to estimate the reference tissue time-activity curves). A particular challenge with the direct 4D EM formulation is that the intercept parameters in graphical (linearized) analysis of reversible tracers (e.g. Logan or RE analysis) are commonly negative (unlike for irreversible tracers, e.g. using Patlak analysis). Subsequently, we focused our attention on the AB-EM algorithm, derived by Byrne (1998, Inverse Problems 14 1455-67) to allow inclusion of prior information about the lower (A) and upper (B) bounds for image values. We then generalized this algorithm to the 4D EM framework, thus allowing negative intercept parameters. Furthermore, our 4D AB-EM algorithm incorporated and emphasized the use of spatially varying lower bounds to achieve enhanced performance. As validation, the means of parameters estimated from 55 human (11)C-raclopride dynamic PET studies were used for extensive simulations using a mathematical brain phantom. Images were reconstructed using conventional indirect as well as proposed direct parametric imaging methods. Noise versus bias quantitative measurements were performed in various regions of the brain. Direct 4D EM reconstruction resulted in notable qualitative and quantitative accuracy improvements (over 35% noise reduction, with matched bias, in both plasma and reference-tissue input models). Similar improvements were also observed in the coefficient of variation of the estimated DV and DVR values even for relatively low uptake cortical regions, suggesting the enhanced ability for robust parameter estimation. The method was also tested on a 90 min (11)C-raclopride patient study performed on the high-resolution research tomograph wherein the proposed method was shown across a variety of regions to outperform the conventional method in the sense that for a given DVR value, improved noise levels were observed.
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Affiliation(s)
- Arman Rahmim
- Department of Radiology, Johns Hopkins University, Baltimore, MD 21287, USA.
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Jennings TL, Triulzi RC, Tao G, St. Louis ZE, Becker-Catania SG. Simplistic attachment and multispectral imaging with semiconductor nanocrystals. SENSORS 2011; 11:10557-70. [PMID: 22346658 PMCID: PMC3274300 DOI: 10.3390/s111110557] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 10/26/2011] [Accepted: 10/26/2011] [Indexed: 11/16/2022]
Abstract
Advances in spectral deconvolution technologies are rapidly enabling researchers to replace or enhance traditional epifluorescence microscopes with instruments capable of detecting numerous markers simultaneously in a multiplexed fashion. While significantly expediting sample throughput and elucidating sample information, this technology is limited by the spectral width of common fluorescence reporters. Semiconductor nanocrystals (NC’s) are very bright, narrow band fluorescence emitters with great potential for multiplexed fluorescence detection, however the availability of NC’s with facile attachment chemistries to targeting molecules has been a severe limitation to the advancement of NC technology in applications such as immunocytochemistry and immunohistochemistry. Here we report the development of simple, yet novel attachment chemistries for antibodies onto NC’s and demonstrate how spectral deconvolution technology enables the multiplexed detection of 5 distinct NC-antibody conjugates with fluorescence emission wavelengths separated by as little as 20 nm.
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Affiliation(s)
- Travis L. Jennings
- Author to whom correspondence should be addressed; E-Mails: (T.L.J.); (S.G.B.-C.); Tel.: +858-784-5390 (T.L.J.)
| | | | | | | | - Sara G. Becker-Catania
- Author to whom correspondence should be addressed; E-Mails: (T.L.J.); (S.G.B.-C.); Tel.: +858-784-5390 (T.L.J.)
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33
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Hight MR, Nolting DD, McKinley ET, Lander AD, Wyatt SK, Gonyea M, Zhao P, Manning HC. Multispectral fluorescence imaging to assess pH in biological specimens. JOURNAL OF BIOMEDICAL OPTICS 2011; 16:016007. [PMID: 21280913 PMCID: PMC3041815 DOI: 10.1117/1.3533264] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 11/01/2010] [Accepted: 11/17/2010] [Indexed: 05/29/2023]
Abstract
Simple, quantitative assays to measure pH in tissue could improve the study of complicated biological processes and diseases such as cancer. We evaluated multispectral fluorescence imaging (MSFI) to quantify extracellular pH (pHe) in dye-perfused, surgically-resected tumor specimens with commercially available instrumentation. Utilizing a water-soluble organic dye with pH-dependent fluorescence emission (SNARF-4F), we used standard fluorimetry to quantitatively assess the emission properties of the dye as a function of pH. By conducting these studies within the spectroscopic constraints imposed by the appropriate imaging filter set supplied with the imaging system, we determined that correction of the fluorescence emission of deprotonated dye was necessary for accurate determination of pH due to suboptimal excitation. Subsequently, employing a fluorimetry-derived correction factor (CF), MSFI data sets of aqueous dye solutions and tissuelike phantoms could be spectrally unmixed to accurately quantify equilibrium concentrations of protonated (HA) and deprotonated (A-) dye and thus determine solution pH. Finally, we explored the feasibility of MSFI for high-resolution pHe mapping of human colorectal cancer cell-line xenografts. Data presented suggest that MSFI is suitable for quantitative determination of pHe in ex vivo dye-perfused tissue, potentially enabling measurement of pH across a variety of preclinical models of disease.
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Affiliation(s)
- Matthew R Hight
- Vanderbilt University, Department of Physics, Nashville, Tennessee 37221, USA
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34
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Napp J, Mathejczyk JE, Alves F. Optical imaging in vivo with a focus on paediatric disease: technical progress, current preclinical and clinical applications and future perspectives. Pediatr Radiol 2011; 41:161-75. [PMID: 21221568 PMCID: PMC3032188 DOI: 10.1007/s00247-010-1907-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Revised: 09/20/2010] [Accepted: 10/10/2010] [Indexed: 12/30/2022]
Abstract
To obtain information on the occurrence and location of molecular events as well as to track target-specific probes such as antibodies or peptides, drugs or even cells non-invasively over time, optical imaging (OI) technologies are increasingly applied. Although OI strongly contributes to the advances made in preclinical research, it is so far, with the exception of optical coherence tomography (OCT), only very sparingly applied in clinical settings. Nevertheless, as OI technologies evolve and improve continuously and represent relatively inexpensive and harmful methods, their implementation as clinical tools for the assessment of children disease is increasing. This review focuses on the current preclinical and clinical applications as well as on the future potential of OI in the clinical routine. Herein, we summarize the development of different fluorescence and bioluminescence imaging techniques for microscopic and macroscopic visualization of microstructures and biological processes. In addition, we discuss advantages and limitations of optical probes with distinct mechanisms of target-detection as well as of different bioluminescent reporter systems. Particular attention has been given to the use of near-infrared (NIR) fluorescent probes enabling observation of molecular events in deeper tissue.
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Affiliation(s)
- Joanna Napp
- Department of Molecular Biology of Neuronal Signals, Max-Planck-Institute for Experimental Medicine, Hermann-Rein-Str. 3, 37075 Göttingen, Germany ,Department of Hematology and Oncology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany
| | - Julia E. Mathejczyk
- Department of Molecular Biology of Neuronal Signals, Max-Planck-Institute for Experimental Medicine, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
| | - Frauke Alves
- Department of Molecular Biology of Neuronal Signals, Max-Planck-Institute for Experimental Medicine, Hermann-Rein-Str. 3, 37075 Göttingen, Germany ,Department of Hematology and Oncology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany
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Buckle T, Chin PTK, van den Berg NS, Loo CE, Koops W, Gilhuijs KGA, van Leeuwen FWB. Tumor bracketing and safety margin estimation using multimodal marker seeds: a proof of concept. JOURNAL OF BIOMEDICAL OPTICS 2010; 15:056021. [PMID: 21054115 DOI: 10.1117/1.3503955] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Accurate tumor excision is crucial in the locoregional treatment of cancer, and for this purpose, surgeons often rely on guide wires or radioactive markers for guidance toward the lesion. Further improvement may be obtained by adding optical guidance to currently used methods, in the form of intra-operative fluorescence imaging. To achieve such a multimodal approach, we have generated markers that can be used in a pre-, intra-, and post-operative setting, based on a cocktail of a dual-emissive inorganic dye, lipids, and pertechnetate. Phantom experiments demonstrate that these seeds can be placed accurately around a surrogate tumor using ultrasound. Three-dimensional bracketing provides delineation of the entire lesion. Combined with the multimodal nature, this provides the opportunity to predetermine the resection margins by validating the placement accuracy using multiple imaging modalities (namely, x ray, MRI, SPECT/CT, and ultrasound). The dual-emissive fluorescent properties of the dye provide the unique opportunity to intra-operatively estimate the depth of the seed in the tissue via multispectral imaging: emission green λmax=520 nm≤5 mm penetration versus emission red λmax=660 nm≤12 mm penetration. By using particles with different colors, the original geographic orientation of the excised tissue can be determined.
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Affiliation(s)
- Tessa Buckle
- Department of Radiology, Division of Diagnostic Oncology at the Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, 1066 CX Amsterdam, The Netherlands
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Abstract
Fusion imaging of radionuclide-based molecular (PET) and structural data [x-ray computed tomography (CT)] has been firmly established. Here we show that optical measurements [fluorescence-mediated tomography (FMT)] show exquisite congruence to radionuclide measurements and that information can be seamlessly integrated and visualized. Using biocompatible nanoparticles as a generic platform (containing a (18)F isotope and a far red fluorochrome), we show good correlations between FMT and PET in probe concentration (r(2) > 0.99) and spatial signal distribution (r(2) > 0.85). Using a mouse model of cancer and different imaging probes to measure tumoral proteases, macrophage content and integrin expression simultaneously, we demonstrate the distinct tumoral locations of probes in multiple channels in vivo. The findings also suggest that FMT can serve as a surrogate modality for the screening and development of radionuclide-based imaging agents.
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