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Deng P, Liu S, Zhao Y, Zhang X, Kong Y, Liu L, Xiao Y, Yang S, Hu J, Su J, Xuan A, Xu J, Li H, Su X, Wu J, Jiang Y, Mu Y, Shao Z, Kong C, Li B. Long-working-distance high-collection-efficiency three-photon microscopy for in vivo long-term imaging of zebrafish and organoids. iScience 2024; 27:110554. [PMID: 39184441 PMCID: PMC11342284 DOI: 10.1016/j.isci.2024.110554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 05/31/2024] [Accepted: 07/17/2024] [Indexed: 08/27/2024] Open
Abstract
Zebrafish and organoids, crucial for complex biological studies, necessitate an imaging system with deep tissue penetration, sample protection from environmental interference, and ample operational space. Traditional three-photon microscopy is constrained by short-working-distance objectives and falls short. Our long-working-distance high-collection-efficiency three-photon microscopy (LH-3PM) addresses these challenges, achieving a 58% fluorescence collection efficiency at a 20 mm working distance. LH-3PM significantly outperforms existing three-photon systems equipped with the same long working distance objective, enhancing fluorescence collection and dramatically reducing phototoxicity and photobleaching. These improvements facilitate accurate capture of neuronal activity and an enhanced detection of activity spikes, which are vital for comprehensive, long-term imaging. LH-3PM's imaging of epileptic zebrafish not only showed sustained neuron activity over an hour but also highlighted increased neural synchronization and spike numbers, marking a notable shift in neural coding mechanisms. This breakthrough paves the way for new explorations of biological phenomena in small model organisms.
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Affiliation(s)
- Peng Deng
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
| | - Shoupei Liu
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
| | - Yaoguang Zhao
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
| | - Xinxin Zhang
- Institute of Neuroscience, State Key Laboratory of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yufei Kong
- Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Institute of Pediatrics, National Children’s Medical Center, Children’s Hospital, Fudan University, Shanghai 200032, China
| | - Linlin Liu
- Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Institute of Pediatrics, National Children’s Medical Center, Children’s Hospital, Fudan University, Shanghai 200032, China
| | - Yujie Xiao
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
| | - Shasha Yang
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200032, China
| | - Jiahao Hu
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
| | - Jixiong Su
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
| | - Ang Xuan
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
- Academy for Engineering and Technology, Fudan University, Shanghai 200433, China
| | - Jinhong Xu
- Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Institute of Pediatrics, National Children’s Medical Center, Children’s Hospital, Fudan University, Shanghai 200032, China
| | - Huijuan Li
- Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Institute of Pediatrics, National Children’s Medical Center, Children’s Hospital, Fudan University, Shanghai 200032, China
| | - Xiaoman Su
- State Key Laboratory of Medical Neurobiology, Institutes of Brain Science, MOE Frontiers Center for Brain Science, Department of Neurology of Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Jingchuan Wu
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai 200032, China
| | - Yuli Jiang
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
| | - Yu Mu
- Institute of Neuroscience, State Key Laboratory of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China
| | - Zhicheng Shao
- Institute for Translational Brain Research, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Institute of Pediatrics, National Children’s Medical Center, Children’s Hospital, Fudan University, Shanghai 200032, China
| | - Cihang Kong
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
| | - Bo Li
- Department of Neurosurgery, Huashan Hospital, MOE Frontiers Center for Brain Science, State Key Laboratory of Medical Neurobiology, Institutes for Translational Brain Research, Fudan University, Shanghai 200032, China
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He K, Zhao L, Chen Y, Huang X, Ding Y, Hua H, Liu L, Wang X, Wang M, Zhang Y, Fan Z. Label-free multiphoton microscopic imaging as a novel real-time approach for discriminating colorectal lesions: A preliminary study. J Gastroenterol Hepatol 2019; 34:2144-2151. [PMID: 31265738 DOI: 10.1111/jgh.14772] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 05/21/2019] [Accepted: 06/25/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND AIM Although various endoscopic technologies have been developed to increase the visual diagnostic accuracy of colorectal precancerosis and early carcinoma, the biopsy-dependent pathology still remains the golden standard. During routine endoscopy, real-time optical histological diagnosis is desired. Without fluorescent label, multiphoton microscopy (MPM) imaging directly reveals live cellular morphology and tissue microenvironment based on intrinsic two-photon excited fluorescence and second harmonic generation signals. Its high-imaging resolution and performance are comparable with the histopathology. We thus aimed to initially investigate the original features of colorectal diseases under MPM and evaluate its potential for real-time diagnosis. METHODS Experimental and diagnostic cohorts were designed. Multiphoton images of 40 ex vivo fresh tissues confirmed pathologically of colorectal normal tissues, hyperplastic polyps, adenomas, and adenocarcinomas were collected. Features were recorded to establish diagnostic standards with MPM. For the second cohort with 92 fresh tissues, we distinguished the various colorectal diseases with conclusive MPM features. RESULTS Through the investigation, the colorectal diseases were presented differences in the crypt opening, gland structure, epithelial cells, and collagen fibers. With the typical features, we preliminarily tested the diagnostic efficiency and found that its sensitivity for distinguishing normal, hyperplastic polyps, adenoma and adenocarcinoma was 88.89%, 76.47%, 83.33%, and 97.92%, while the specificity was 99.32%, 94.00%, 94.92%, and 94.12%, respectively. CONCLUSION The real-time multiphoton microscopic imaging can be effective to identify the colorectal lesions with high resolution. Via integrating with the endoscopes in the future, it could promote precise optical diagnosis in clinics.
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Affiliation(s)
- Kexin He
- Department of Digestive Endoscopy, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Lili Zhao
- Department of Digestive Endoscopy, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Yingtong Chen
- Department of Digestive Endoscopy, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Xiaoyang Huang
- National Laboratory of Solid State Microstructure of Nanjing University, Nanjing, China
| | - Ying Ding
- Department of Pathology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Hongjin Hua
- Department of Pathology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Li Liu
- Department of Digestive Endoscopy, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Xiang Wang
- Department of Digestive Endoscopy, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Min Wang
- Department of Digestive Endoscopy, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China
| | - Yong Zhang
- National Laboratory of Solid State Microstructure of Nanjing University, Nanjing, China
| | - Zhining Fan
- Department of Digestive Endoscopy, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China.,Department of General Surgery, The First Affiliated Hospital with Nanjing Medical University, Nanjing, China
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St-Georges-Robillard A, Cahuzac M, Péant B, Fleury H, Lateef MA, Ricard A, Sauriol A, Leblond F, Mes-Masson AM, Gervais T. Long-term fluorescence hyperspectral imaging of on-chip treated co-culture tumour spheroids to follow clonal evolution. Integr Biol (Camb) 2019; 11:130-141. [PMID: 31172192 DOI: 10.1093/intbio/zyz012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/09/2019] [Accepted: 05/30/2019] [Indexed: 12/22/2022]
Abstract
Multicellular tumour spheroids are an ideal in vitro tumour model to study clonal heterogeneity and drug resistance in cancer research because different cell types can be mixed at will. However, measuring the individual response of each cell population over time is challenging: current methods are either destructive, such as flow cytometry, or cannot image throughout a spheroid, such as confocal microscopy. Our group previously developed a wide-field fluorescence hyperspectral imaging system to study spheroids formed and cultured in microfluidic chips. In the present study, two subclones of a single parental ovarian cancer cell line transfected to express different fluorophores were produced and co-culture spheroids were formed on-chip using ratios forming highly asymmetric subpopulations. We performed a 3D proliferation assay on each cell population forming the spheroids that matched the 2D growth behaviour. Response assays to PARP inhibitors and platinum-based drugs were also performed to follow the clonal evolution of mixed populations. Our experiments show that hyperspectral imaging can detect spheroid response before observing a decrease in spheroid diameter. Hyperspectral imaging and microfluidic-based spheroid assays provide a versatile solution to study clonal heterogeneity, able to measure response in subpopulations presenting as little as 10% of the initial spheroid.
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Affiliation(s)
- Amélie St-Georges-Robillard
- Polytechnique Montréal, Department of Engineering Physics and Institute of Biomedical Engineering, Montreal, Canada
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
| | - Maxime Cahuzac
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
| | - Benjamin Péant
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
- TransMedTech Institute, Montréal, Canada
| | - Hubert Fleury
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
| | - Muhammad Abdul Lateef
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
| | - Alexis Ricard
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
| | - Alexandre Sauriol
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
| | - Frédéric Leblond
- Polytechnique Montréal, Department of Engineering Physics and Institute of Biomedical Engineering, Montreal, Canada
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
| | - Anne-Marie Mes-Masson
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
- Université de Montréal, Department of Medicine, Montreal, Canada
| | - Thomas Gervais
- Polytechnique Montréal, Department of Engineering Physics and Institute of Biomedical Engineering, Montreal, Canada
- Centre de recherche du Centre hospitalier de l'Université de Montréal and Institut du cancer de Montréal, Montreal, Canada
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St-Georges-Robillard A, Masse M, Cahuzac M, Strupler M, Patra B, Orimoto AM, Kendall-Dupont J, Péant B, Mes-Masson AM, Leblond F, Gervais T. Fluorescence hyperspectral imaging for live monitoring of multiple spheroids in microfluidic chips. Analyst 2019; 143:3829-3840. [PMID: 29999046 DOI: 10.1039/c8an00536b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tumor spheroids represent a realistic 3D in vitro cancer model because they provide a missing link between monolayer cell culture and live tissues. While microfluidic chips can easily form and assay thousands of spheroids simultaneously, few commercial instruments are available to analyze this massive amount of data. Available techniques to measure spheroid response to external stimuli, such as confocal imaging and flow cytometry, are either not appropriate for 3D cultures, or destructive. We designed a wide-field hyperspectral imaging system to analyze multiple spheroids trapped in a microfluidic chip in a single acquisition. The system and its fluorescence quantification algorithm were assessed using liquid phantoms mimicking spheroid optical properties. Spectral unmixing was tested on three overlapping spectral entities. Hyperspectral images of co-culture spheroids expressing two fluorophores were compared with confocal microscopy and spheroid growth was measured over time. The system can spectrally analyze multiple fluorescent markers simultaneously and allows multiple time-points assays, providing a fast and versatile solution for analyzing lab on a chip devices.
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Affiliation(s)
- Amélie St-Georges-Robillard
- Department of Engineering Physics, Polytechnique Montréal, C.P. 6079, Succ. Centre-ville, Montreal, Qc H3C 3A7, Canada.
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Label-free imaging for T staging of gastric carcinoma by multiphoton microscopy. Lasers Med Sci 2018; 33:871-882. [DOI: 10.1007/s10103-018-2442-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 01/08/2018] [Indexed: 12/17/2022]
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Xu J, Kang D, Zeng Y, Zhuo S, Zhu X, Jiang L, Chen J, Lin J. Multiphoton microscopy for label-free identification of intramural metastasis in human esophageal squamous cell carcinoma. BIOMEDICAL OPTICS EXPRESS 2017; 8:3360-3368. [PMID: 28717572 PMCID: PMC5508833 DOI: 10.1364/boe.8.003360] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 06/13/2017] [Accepted: 06/14/2017] [Indexed: 05/20/2023]
Abstract
For complete removal of cancerous tissue in esophageal squamous cell carcinoma (ESCC), intramural metastasis (IM) should be identified preoperatively or intraoperatively. Here, multiphoton microscopy (MPM) was introduced for label-free identification of IM in the esophageal wall, by a combination of two-photon excited fluorescence (TPEF), second harmonic generation (SHG) imaging, and spectral analysis. Three-dimensional (3D) imaging of the IM region was also performed. Quantitative parameters, including 3D fiber orientation, were measured by 3D-weighted orientation vector summation. Overall, MPM showed the potential to identify IM. With the development of the advanced MPM endoscope, clinical identification of IM by MPM will be possible.
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Affiliation(s)
- Jian Xu
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
- These authors contributed equally to this work
| | - Deyong Kang
- Department of Pathology, The Affiliated Union Hospital, Fujian Medical University, Fuzhou 350001, China
- These authors contributed equally to this work
| | - Yaping Zeng
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
- These authors contributed equally to this work
| | - Shuangmu Zhuo
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
| | - Xiaoqin Zhu
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
| | - Liwei Jiang
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
| | - Jianxin Chen
- Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Provincial Key Laboratory of Photonics Technology, Fujian Normal University, Fuzhou 350007, China
| | - Jiangbo Lin
- Department of Thoracic Surgery, The Affiliated Union Hospital, Fujian Medical University, Fuzhou 350001, China
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Tafreshi NK, Enkemann SA, Bui MM, Lloyd MC, Abrahams D, Huynh AS, Kim J, Grobmyer SR, Carter WB, Vagner J, Gillies RJ, Morse DL. A mammaglobin-A targeting agent for noninvasive detection of breast cancer metastasis in lymph nodes. Cancer Res 2011; 71:1050-9. [PMID: 21169406 PMCID: PMC4130564 DOI: 10.1158/0008-5472.can-10-3091] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Pathologic axillary lymph node (ALN) status is an important prognostic factor for staging breast cancer. Currently, status is determined by histopathology following surgical excision of sentinel lymph node(s), which is an invasive, time consuming, and costly procedure with potential morbidity to the patient. Here, we describe an imaging platform for noninvasive assessment of ALN status, eliminating the need for surgical examination of patients to rule out nodal involvement. A targeted imaging probe (MamAb-680) was developed by conjugation of a mammaglobin-A-specific monoclonal antibody to a near-infrared fluorescent dye. Using DNA and tissue microarray, mammaglobin-A was validated as a cell-surface target that is expressed in ALN-positive patient samples but is not expressed in normal lymph nodes. In vivo selectivity was determined by i.v. injection of MamAb-680 into mice with mammaglobin-A-positive and -negative mammary fat pad (MFP) tumors; and by peritumoral MFP injection of the targeted imaging probe in mice with spontaneous ALN metastases. Fluorescence imaging showed that probe was only retained in positive tumors and metastases. As few as 1,000 cells that endogenously express mammaglobin-A were detected in ALN, indicating high sensitivity of this method. Translation of this approach offers considerable potential as a noninvasive clinical strategy to stage breast cancer.
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Affiliation(s)
- NK Tafreshi
- Dept. Functional & Molecular Imaging, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
| | - SA Enkemann
- Microarray Core Facility, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
| | - MM Bui
- Anatomic Pathology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
- Analytic Microscopy Core Facility, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
| | - MC Lloyd
- Analytic Microscopy Core Facility, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
| | - D Abrahams
- Division of Comparative Medicine, University of South Florida, Tampa, FL
| | - AS Huynh
- Dept. Functional & Molecular Imaging, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
| | - J Kim
- Biostatistics Core Facility, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
| | - SR Grobmyer
- Department of Surgery, University of Florida, Gainesville, FL
| | - WB Carter
- Breast Department, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
| | - J Vagner
- BIO5 Institute, University of Arizona, Tucson, AZ
| | - RJ Gillies
- Dept. Functional & Molecular Imaging, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
| | - DL Morse
- Dept. Functional & Molecular Imaging, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL
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Tu C, Ma X, Pantazis P, Kauzlarich SM, Louie AY. Paramagnetic, silicon quantum dots for magnetic resonance and two-photon imaging of macrophages. J Am Chem Soc 2010; 132:2016-23. [PMID: 20092250 PMCID: PMC2836323 DOI: 10.1021/ja909303g] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Quantum dots (QDs) are an attractive platform for building multimodality imaging probes, but the toxicity for typical cadmium QDs limits enthusiasm for their clinical use. Nontoxic, silicon QDs are more promising but tend to require short-wavelength excitations which are subject to tissue scattering and autofluorescence artifacts. Herein, we report the synthesis of paramagnetic, manganese-doped, silicon QDs (Si(Mn) QDs) and demonstrate that they are detectable by both MRI and near-infrared excited, two-photon imaging. The Si(Mn) QDs are coated with dextran sulfate to target them to scavenger receptors on macrophages, a biomarker of vulnerable plaques. TEM images show that isolated QDs have an average core diameter of 4.3 +/- 1.0 nm and the hydrodynamic diameters of coated nanoparticles range from 8.3 to 43 nm measured by dynamic light scattering (DLS). The Si(Mn) QDs have an r(1) relaxivity of 25.50 +/- 1.44 mM(-1) s(-1) and an r(2) relaxivity of 89.01 +/- 3.26 mM(-1) s(-1) (37 degrees C, 1.4 T). They emit strong fluorescence at 441 nm with a quantum yield of 8.1% in water. Cell studies show that the probes specifically accumulate in macrophages by a receptor-mediated process, are nontoxic to mammalian cells, and produce distinct contrast in both T(1)-weighted magnetic resonance and single- or two-photon excitation fluorescence images. These QDs have promising diagnostic potential as high macrophage density is associated with atherosclerotic plaques vulnerable to rupture.
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Affiliation(s)
- Chuqiao Tu
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA
| | - Xuchu Ma
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA
- Department of Chemistry, University of California, Davis, CA 95616, USA
| | - Periklis Pantazis
- Biological Imaging Center, Beckman Institute, California Institute of Technology, Pasadena, CA 91125, USA
| | | | - Angelique Y. Louie
- Department of Biomedical Engineering, University of California, Davis, CA 95616, USA
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Galanzha EI, Kokoska MS, Shashkov EV, Kim JW, Tuchin VV, Zharov VP. In vivo fiber-based multicolor photoacoustic detection and photothermal purging of metastasis in sentinel lymph nodes targeted by nanoparticles. JOURNAL OF BIOPHOTONICS 2009; 2:528-39. [PMID: 19743443 PMCID: PMC3663141 DOI: 10.1002/jbio.200910046] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
This report introduces a novel diagnostic and therapeutic platform for in vivo non-invasive detection and treatment of metastases in sentinel lymph nodes (SLNs) at single cell level using an integrated system of multicolor photoacoustic (PA) lymph flow cytometry, PA lymphography, absorption image cytometry, and photothermal (PT) therapy. A melanoma-bearing mouse model was used to demonstrate the capability of this platform for real-time lymphatic mapping, counting of disseminated tumor cells (DTCs) in prenodal lymphatics, and detecting metastasis in SLNs and its purging. The detection and ablation of non-pigmented breast cancer cells in SLNs was achieved by labeling them with nanoparticles. The association between DTC count and SLN metastasis progression supports lymphatic DTCs as a novel prognostic marker of metastasis. The fiber-based portable PA device may replace the conventional SLN(s) excision and histology-based staging. The earliest detection of DTCs in the lymphatic vessels before the establishment of nodal metastasis may prevent metastasis by well-timed ablation of DTCs.
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Affiliation(s)
- Ekaterina I Galanzha
- Winthrop P. Rockefeller Cancer Institute, Phillips Classic Laser & Nanomedicine Laboratories, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA.
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