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Zhang W, Li Y, Fung AA, Li Z, Jang H, Zha H, Chen X, Gao F, Wu JY, Sheng H, Yao J, Skowronska-Krawczyk D, Jain S, Shi L. Multi-molecular hyperspectral PRM-SRS microscopy. Nat Commun 2024; 15:1599. [PMID: 38383552 PMCID: PMC10881988 DOI: 10.1038/s41467-024-45576-6] [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: 06/13/2023] [Accepted: 01/26/2024] [Indexed: 02/23/2024] Open
Abstract
Lipids play crucial roles in many biological processes. Mapping spatial distributions and examining the metabolic dynamics of different lipid subtypes in cells and tissues are critical to better understanding their roles in aging and diseases. Commonly used imaging methods (such as mass spectrometry-based, fluorescence labeling, conventional optical imaging) can disrupt the native environment of cells/tissues, have limited spatial or spectral resolution, or cannot distinguish different lipid subtypes. Here we present a hyperspectral imaging platform that integrates a Penalized Reference Matching algorithm with Stimulated Raman Scattering (PRM-SRS) microscopy. Using this platform, we visualize and identify high density lipoprotein particles in human kidney, a high cholesterol to phosphatidylethanolamine ratio inside granule cells of mouse hippocampus, and subcellular distributions of sphingosine and cardiolipin in human brain. Our PRM-SRS displays unique advantages of enhanced chemical specificity, subcellular resolution, and fast data processing in distinguishing lipid subtypes in different organs and species.
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Affiliation(s)
- Wenxu Zhang
- Shu Chien-Gene Lay Dept. of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Yajuan Li
- Shu Chien-Gene Lay Dept. of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Anthony A Fung
- Shu Chien-Gene Lay Dept. of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Zhi Li
- Shu Chien-Gene Lay Dept. of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Hongje Jang
- Shu Chien-Gene Lay Dept. of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Honghao Zha
- Shu Chien-Gene Lay Dept. of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Xiaoping Chen
- Dept. of Neurology, Northwestern University School of Medicine, Chicago, IL, USA
| | - Fangyuan Gao
- Center for Translational Vision Research, School of Medicine, University of California Irvine, Irvine, CA, USA
| | - Jane Y Wu
- Dept. of Neurology, Northwestern University School of Medicine, Chicago, IL, USA
| | - Huaxin Sheng
- Dept. of Anesthesiology, Duke University School of Medicine, Durham, NC, USA
| | - Junjie Yao
- Dept. of Biomedical Engineering, Duke University, Durham, NC, USA
| | - Dorota Skowronska-Krawczyk
- Center for Translational Vision Research, School of Medicine, University of California Irvine, Irvine, CA, USA
| | - Sanjay Jain
- Dept. of Medicine, Washington University in St. Louis, St. Louis, MO, USA
- Dept. of Pathology & Immunology, Washington University in St. Louis, St. Louis, MO, USA
- Dept. of Pediatrics, Washington University in St. Louis, St. Louis, MO, USA
| | - Lingyan Shi
- Shu Chien-Gene Lay Dept. of Bioengineering, University of California San Diego, La Jolla, CA, USA.
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Harris G, Stickland CA, Lim M, Goldberg Oppenheimer P. Raman Spectroscopy Spectral Fingerprints of Biomarkers of Traumatic Brain Injury. Cells 2023; 12:2589. [PMID: 37998324 PMCID: PMC10670390 DOI: 10.3390/cells12222589] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 11/02/2023] [Accepted: 11/06/2023] [Indexed: 11/25/2023] Open
Abstract
Traumatic brain injury (TBI) affects millions of people of all ages around the globe. TBI is notoriously hard to diagnose at the point of care, resulting in incorrect patient management, avoidable death and disability, long-term neurodegenerative complications, and increased costs. It is vital to develop timely, alternative diagnostics for TBI to assist triage and clinical decision-making, complementary to current techniques such as neuroimaging and cognitive assessment. These could deliver rapid, quantitative TBI detection, by obtaining information on biochemical changes from patient's biofluids. If available, this would reduce mis-triage, save healthcare providers costs (both over- and under-triage are expensive) and improve outcomes by guiding early management. Herein, we utilize Raman spectroscopy-based detection to profile a panel of 18 raw (human, animal, and synthetically derived) TBI-indicative biomarkers (N-acetyl-aspartic acid (NAA), Ganglioside, Glutathione (GSH), Neuron Specific Enolase (NSE), Glial Fibrillary Acidic Protein (GFAP), Ubiquitin C-terminal Hydrolase L1 (UCHL1), Cholesterol, D-Serine, Sphingomyelin, Sulfatides, Cardiolipin, Interleukin-6 (IL-6), S100B, Galactocerebroside, Beta-D-(+)-Glucose, Myo-Inositol, Interleukin-18 (IL-18), Neurofilament Light Chain (NFL)) and their aqueous solution. The subsequently derived unique spectral reference library, exploiting four excitation lasers of 514, 633, 785, and 830 nm, will aid the development of rapid, non-destructive, and label-free spectroscopy-based neuro-diagnostic technologies. These biomolecules, released during cellular damage, provide additional means of diagnosing TBI and assessing the severity of injury. The spectroscopic temporal profiles of the studied biofluid neuro-markers are classed according to their acute, sub-acute, and chronic temporal injury phases and we have further generated detailed peak assignment tables for each brain-specific biomolecule within each injury phase. The intensity ratios of significant peaks, yielding the combined unique spectroscopic barcode for each brain-injury marker, are compared to assess variance between lasers, with the smallest variance found for UCHL1 (σ2 = 0.000164) and the highest for sulfatide (σ2 = 0.158). Overall, this work paves the way for defining and setting the most appropriate diagnostic time window for detection following brain injury. Further rapid and specific detection of these biomarkers, from easily accessible biofluids, would not only enable the triage of TBI, predict outcomes, indicate the progress of recovery, and save healthcare providers costs, but also cement the potential of Raman-based spectroscopy as a powerful tool for neurodiagnostics.
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Affiliation(s)
- Georgia Harris
- Advanced Nanomaterials Structures and Applications Laboratories, School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Clarissa A. Stickland
- Advanced Nanomaterials Structures and Applications Laboratories, School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Matthias Lim
- Advanced Nanomaterials Structures and Applications Laboratories, School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Pola Goldberg Oppenheimer
- Advanced Nanomaterials Structures and Applications Laboratories, School of Chemical Engineering, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
- Institute of Healthcare Technologies, Mindelsohn Way, Birmingham B15 2TH, UK
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3
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Wang J, Zhang G. Side‐viewing handheld confocal Raman probe coupled with an off‐axis parabolic mirror for superficial epithelial Raman measurements of luminal organs. TRANSLATIONAL BIOPHOTONICS 2022. [DOI: 10.1002/tbio.202200010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Jianfeng Wang
- Key Laboratory of Photoelectronic Imaging Technology and System of Ministry of Education of China, School of Optics and Photonics Beijing Institute of Technology Beijing China
- Institute of Engineering Medicine, Beijing Institute of Technology Beijing China
| | - Guling Zhang
- College of Science Minzu University of China Beijing China
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Heng HPS, Shu C, Zheng W, Lin K, Huang Z. Advances in real‐time fiber‐optic Raman spectroscopy for early cancer diagnosis: Pushing the frontier into clinical endoscopic applications. TRANSLATIONAL BIOPHOTONICS 2020. [DOI: 10.1002/tbio.202000018] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Howard Peng Sin Heng
- Optical Bioimaging Laboratory, Department of Biomedical Engineering, Faculty of Engineering National University of Singapore Singapore Singapore
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore Singapore
| | - Chi Shu
- Optical Bioimaging Laboratory, Department of Biomedical Engineering, Faculty of Engineering National University of Singapore Singapore Singapore
| | - Wei Zheng
- Optical Bioimaging Laboratory, Department of Biomedical Engineering, Faculty of Engineering National University of Singapore Singapore Singapore
| | - Kan Lin
- Optical Bioimaging Laboratory, Department of Biomedical Engineering, Faculty of Engineering National University of Singapore Singapore Singapore
| | - Zhiwei Huang
- Optical Bioimaging Laboratory, Department of Biomedical Engineering, Faculty of Engineering National University of Singapore Singapore Singapore
- NUS Graduate School for Integrative Sciences and Engineering National University of Singapore Singapore Singapore
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Bergholt MS, Serio A, Albro MB. Raman Spectroscopy: Guiding Light for the Extracellular Matrix. Front Bioeng Biotechnol 2019; 7:303. [PMID: 31737621 PMCID: PMC6839578 DOI: 10.3389/fbioe.2019.00303] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 10/16/2019] [Indexed: 12/12/2022] Open
Abstract
The extracellular matrix (ECM) consists of a complex mesh of proteins, glycoproteins, and glycosaminoglycans, and is essential for maintaining the integrity and function of biological tissues. Imaging and biomolecular characterization of the ECM is critical for understanding disease onset and for the development of novel, disease-modifying therapeutics. Recently, there has been a growing interest in the use of Raman spectroscopy to characterize the ECM. Raman spectroscopy is a label-free vibrational technique that offers unique insights into the structure and composition of tissues and cells at the molecular level. This technique can be applied across a broad range of ECM imaging applications, which encompass in vitro, ex vivo, and in vivo analysis. State-of-the-art confocal Raman microscopy imaging now enables label-free assessments of the ECM structure and composition in tissue sections with a remarkably high degree of biomolecular specificity. Further, novel fiber-optic instrumentation has opened up for clinical in vivo ECM diagnostic measurements across a range of tissue systems. A palette of advanced computational methods based on multivariate statistics, spectral unmixing, and machine learning can be applied to Raman data, allowing for the extraction of specific biochemical information of the ECM. Here, we review Raman spectroscopy techniques for ECM characterizations over a variety of exciting applications and tissue systems, including native tissue assessments (bone, cartilage, cardiovascular), regenerative medicine quality assessments, and diagnostics of disease states. We further discuss the challenges in the widespread adoption of Raman spectroscopy in biomedicine. The results of the latest discovery-driven Raman studies are summarized, illustrating the current and potential future applications of Raman spectroscopy in biomedicine.
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Affiliation(s)
- Mads S. Bergholt
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Andrea Serio
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Michael B. Albro
- Department of Mechanical Engineering, Boston University, Boston, MA, United States
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Masson LE, O'Brien CM, Pence IJ, Herington JL, Reese J, van Leeuwen TG, Mahadevan-Jansen A. Dual excitation wavelength system for combined fingerprint and high wavenumber Raman spectroscopy. Analyst 2018; 143:6049-6060. [PMID: 30420993 PMCID: PMC6295447 DOI: 10.1039/c8an01989d] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A fiber optic probe-based Raman spectroscopy system using a single laser module with two excitation wavelengths, at 680 and 785 nm, has been developed for measuring the fingerprint and high wavenumber regions using a single detector. This system is simpler and less expensive than previously reported configurations of combined fingerprint and high wavenumber Raman systems, and its probe-based implementation facilitates numerous in vivo applications. The high wavenumber region of the Raman spectrum ranges from 2800-3800 cm-1 and contains valuable information corresponding to the molecular vibrations of proteins, lipids, and water, which is complimentary to the biochemical signatures found in the fingerprint region (800-1800 cm-1), which probes DNA, lipids, and proteins. The efficacy of the system is demonstrated by tracking changes in water content in tissue-mimicking phantoms, where Voigtian decomposition of the high wavenumber water peak revealed a correlation between the water content and type of water-tissue interactions in the samples. This dual wavelength system was then used for in vivo assessment of cervical remodeling during mouse pregnancy, a physiologic process with known changes in tissue hydration. The system shows that Raman spectroscopy is sensitive to changes in collagen content in the fingerprint region and hydration state in the high wavenumber region, which was verified using an ex vivo comparison of wet and dry weight. Simultaneous fingerprint and high wavenumber Raman spectroscopy will allow precise in vivo quantification of tissue water content in the high wavenumber region, paired with the high biochemical specificity of the fingerprint region.
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Affiliation(s)
- Laura E Masson
- Department of Biomedical Engineering, Vanderbilt University, Nashville, USA.
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Aubertin K, Desroches J, Jermyn M, Trinh VQ, Saad F, Trudel D, Leblond F. Combining high wavenumber and fingerprint Raman spectroscopy for the detection of prostate cancer during radical prostatectomy. BIOMEDICAL OPTICS EXPRESS 2018; 9:4294-4305. [PMID: 30615702 PMCID: PMC6157766 DOI: 10.1364/boe.9.004294] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/16/2018] [Accepted: 08/02/2018] [Indexed: 05/14/2023]
Abstract
For prostate cancer (PCa) patients, radical prostatectomy (complete removal of the prostate) is the only curative surgical option. To date, there is no clinical technique allowing for real-time assessment of surgical margins to minimize the extent of residual cancer. Here, we present a tissue interrogation technique using a dual excitation wavelength Raman spectroscopy system capable of sequentially acquiring fingerprint (FP) and high wavenumber (HWN) Raman spectra. Results demonstrate the ability of the system to detect PCa in post-prostatectomy specimens. In total, 477 Raman spectra were collected from 18 human prostate slices. Each area measured with Raman spectroscopy was characterized as either normal or cancer based on histopathological analyses, and each spectrum was classified based on supervised learning using support vector machines (SVMs). Based on receiver operating characteristic (ROC) analysis, FP (area under the curve [AUC] = 0.89) had slightly superior cancer detection capabilities compared with HWN (AUC = 0.86). Optimal performance resulted from combining the spectral information from FP and HWN (AUC = 0.91), suggesting that the use of these two spectral regions may provide complementary molecular information for PCa detection. The use of leave-one-(spectrum)-out (LOO) or leave-one-patient-out (LOPO) cross-validation produced similar classification results when combining FP with HWN. Our findings suggest that the application of machine learning using multiple data points from the same patient does not result in biases necessarily impacting the reliability of the classification models.
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Affiliation(s)
- Kelly Aubertin
- Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), 900 rue St-Denis, Montréal, Quebec H2X 0A9, Canada
- Institut du cancer Montréal (ICM), 900 rue St-Denis, Montréal, Quebec H2X 0A9, Canada
| | - Joannie Desroches
- Polytechnique Montréal, Department of Engineering Physics, CP 6079, Succ. Centre-Ville, Montréal, Quebec H3C 3A7, Canada
| | - Michael Jermyn
- Polytechnique Montréal, Department of Engineering Physics, CP 6079, Succ. Centre-Ville, Montréal, Quebec H3C 3A7, Canada
- Dartmouth College, Thayer School of Engineering, 14 Engineering Drive, Hanover, NH 03755, USA
| | - Vincent Quoc Trinh
- Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), 900 rue St-Denis, Montréal, Quebec H2X 0A9, Canada
- Institut du cancer Montréal (ICM), 900 rue St-Denis, Montréal, Quebec H2X 0A9, Canada
- Centre hospitalier de l’Université de Montréal (CHUM), Laboratoire de pathologie et cytologie, 1100 rue Sanguinet, Montréal, Quebec H2X 0C2, Canada
- Université de Montréal, Department of Pathology and Cellular Biology, 2900 Boulevard Edouard-Montpetit, Montréal, Quebec H3T 1J4, Canada
| | - Fred Saad
- Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), 900 rue St-Denis, Montréal, Quebec H2X 0A9, Canada
- Institut du cancer Montréal (ICM), 900 rue St-Denis, Montréal, Quebec H2X 0A9, Canada
- Centre hospitalier de l’Université de Montréal (CHUM), Division of Urology, 1051 rue Sanguinet, Montréal, Quebec H2X 0C1, Canada
- Université de Montréal, Department of Surgery, 2900 Boulevard Edouard-Montpetit, Montréal, Quebec H3T 1J4, Canada
| | - Dominique Trudel
- Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), 900 rue St-Denis, Montréal, Quebec H2X 0A9, Canada
- Institut du cancer Montréal (ICM), 900 rue St-Denis, Montréal, Quebec H2X 0A9, Canada
- Centre hospitalier de l’Université de Montréal (CHUM), Laboratoire de pathologie et cytologie, 1100 rue Sanguinet, Montréal, Quebec H2X 0C2, Canada
- Université de Montréal, Department of Pathology and Cellular Biology, 2900 Boulevard Edouard-Montpetit, Montréal, Quebec H3T 1J4, Canada
| | - Frédéric Leblond
- Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), 900 rue St-Denis, Montréal, Quebec H2X 0A9, Canada
- Polytechnique Montréal, Department of Engineering Physics, CP 6079, Succ. Centre-Ville, Montréal, Quebec H3C 3A7, Canada
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8
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Zhou X, Dai J, Chen Y, Duan G, Liu Y, Zhang H, Wu H, Peng G. Evaluation of the diagnostic potential of ex vivo Raman spectroscopy in gastric cancers: fingerprint versus high wavenumber. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:105002. [PMID: 27716853 DOI: 10.1117/1.jbo.21.10.105002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 09/19/2016] [Indexed: 06/06/2023]
Abstract
The aim of this study was to apply Raman spectroscopy in the high wavenumber (HW) region (2800 to 3000??cm?1) for ex vivo detection of gastric cancer and compare its diagnostic potential with that of the fingerprint (FP) region (800 to 1800??cm?1). Raman spectra were collected in the FP and HW regions to differentiate between normal mucosa (n=38) and gastric cancer (n=37). The distinctive Raman spectral differences between normal and cancer tissues are observed at 853, 879, 1157, 1319, 1338, 1448, and 2932??cm?1 and are primarily related to proteins, lipids, nucleic acids, collagen, and carotenoids in the tissue. In FP and HW Raman spectroscopy for diagnosis of gastric cancer, multivariate diagnostic algorithms based on partial-least-squares discriminant analysis, together with leave-one-sample-out cross validation, yielded diagnostic sensitivities of 94.59% and 81.08%, and specificities of 86.84% and 71.05%, respectively. Receiver operating characteristic analysis further confirmed that the FP region model performance is superior to that of the HW region model. Better differentiation between normal and gastric cancer tissues can be achieved using FP Raman spectroscopy and PLS-DA techniques, but the complementary natures of the FP and HW regions make both of them useful in diagnosis of gastric cancer.
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Affiliation(s)
- Xueqian Zhou
- Third Military Medical University, Institute of Digestive Disease, Southwest Hospital, No. 30 Gaotanyan Street, Shapingba District, Chongqing 400038, China
| | - Jianhua Dai
- Third Military Medical University, Institute of Digestive Disease, Southwest Hospital, No. 30 Gaotanyan Street, Shapingba District, Chongqing 400038, China
| | - Yao Chen
- Third Military Medical University, Institute of Digestive Disease, Southwest Hospital, No. 30 Gaotanyan Street, Shapingba District, Chongqing 400038, China
| | - Guangjie Duan
- Third Military Medical University, Institute of Pathology and Southwest Cancer Center, Southwest Hospital, No. 30 Gaotanyan Street, Shapingba District, Chongqing 400038, China
| | - Yulong Liu
- Chongqing Institute of Green and Intelligent Technology, Key Laboratory of Multi-scale Manufacturing Technology, Chinese Academy of Sciences, No. 266 Fangzheng Avenue, Shuitu Hi-tech Industrial Park, Shuitu Town, Beibei District, Chongqing 400714, China
| | - Hua Zhang
- Chongqing Institute of Green and Intelligent Technology, Key Laboratory of Multi-scale Manufacturing Technology, Chinese Academy of Sciences, No. 266 Fangzheng Avenue, Shuitu Hi-tech Industrial Park, Shuitu Town, Beibei District, Chongqing 400714, China
| | - Hongbo Wu
- Third Military Medical University, Institute of Digestive Disease, Southwest Hospital, No. 30 Gaotanyan Street, Shapingba District, Chongqing 400038, China
| | - Guiyong Peng
- Third Military Medical University, Institute of Digestive Disease, Southwest Hospital, No. 30 Gaotanyan Street, Shapingba District, Chongqing 400038, China
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Duraipandian S, Zheng W, Ng J, Low JJH, Ilancheran A, Huang Z. Simultaneous fingerprint and high-wavenumber confocal Raman spectroscopy enhances early detection of cervical precancer in vivo. Anal Chem 2012; 84:5913-9. [PMID: 22724621 DOI: 10.1021/ac300394f] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Raman spectroscopy is a vibrational spectroscopic technique capable of nondestructively probing endogenous biomolecules and their changes associated with dysplastic transformation in the tissue. The main objectives of this study are (i) to develop a simultaneous fingerprint (FP) and high-wavenumber (HW) confocal Raman spectroscopy and (ii) to investigate its diagnostic utility for improving in vivo diagnosis of cervical precancer (dysplasia). We have successfully developed an integrated FP/HW confocal Raman diagnostic system with a ball-lens Raman probe for simultaneous acquistion of FP/HW Raman signals of the cervix in vivo within 1 s. A total of 476 in vivo FP/HW Raman spectra (356 normal and 120 precancer) are acquired from 44 patients at clinical colposcopy. The distinctive Raman spectral differences between normal and dysplastic cervical tissue are observed at ~854, 937, 1001, 1095, 1253, 1313, 1445, 1654, 2946, and 3400 cm(-1) mainly related to proteins, lipids, glycogen, nucleic acids and water content in tissue. Multivariate diagnostic algorithms developed based on partial least-squares-discriminant analysis (PLS-DA) together with the leave-one-patient-out, cross-validation yield the diagnostic sensitivities of 84.2%, 76.7%, and 85.0%, respectively; specificities of 78.9%, 73.3%, and 81.7%, respectively; and overall diagnostic accuracies of 80.3%, 74.2%, and 82.6%, respectively, using FP, HW, and integrated FP/HW Raman spectroscopic techniques for in vivo diagnosis of cervical precancer. Receiver operating characteristic (ROC) analysis further confirms the best performance of the integrated FP/HW confocal Raman technique, compared to FP or HW Raman spectroscopy alone. This work demonstrates, for the first time, that the simultaneous FP/HW confocal Raman spectroscopy has the potential to be a clinically powerful tool for improving early diagnosis and detection of cervical precancer in vivo during clinical colposcopic examination.
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Affiliation(s)
- Shiyamala Duraipandian
- Optical Bioimaging Laboratory, Department of Bioengineering, Faculty of Engineering, National University of Singapore, Singapore
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10
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Hajjarian Z, Nadkarni SK. Evaluating the viscoelastic properties of tissue from laser speckle fluctuations. Sci Rep 2012; 2:316. [PMID: 22428085 PMCID: PMC3306019 DOI: 10.1038/srep00316] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 02/27/2012] [Indexed: 12/29/2022] Open
Abstract
Most pathological conditions such as atherosclerosis, cancer, neurodegenerative, and orthopedic disorders are accompanied with alterations in tissue viscoelasticity. Laser Speckle Rheology (LSR) is a novel optical technology that provides the invaluable potential for mechanical assessment of tissue in situ. In LSR, the specimen is illuminated with coherent light and the time constant of speckle fluctuations, τ, is measured using a high speed camera. Prior work indicates that τ is closely correlated with tissue microstructure and composition. Here, we investigate the relationship between LSR measurements of τ and sample mechanical properties defined by the viscoelastic modulus, G*. Phantoms and tissue samples over a broad range of viscoelastic properties are evaluated using LSR and conventional mechanical testing. Results demonstrate a strong correlation between τ and |G*| for both phantom (r = 0.79, p <0.0001) and tissue (r = 0.88, p<0.0001) specimens, establishing the unique capability of LSR in characterizing tissue viscoelasticity.
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Affiliation(s)
- Zeinab Hajjarian
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School , Boston, MA
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11
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Suter MJ, Nadkarni SK, Weisz G, Tanaka A, Jaffer FA, Bouma BE, Tearney GJ. Intravascular optical imaging technology for investigating the coronary artery. JACC Cardiovasc Imaging 2011; 4:1022-39. [PMID: 21920342 PMCID: PMC3583353 DOI: 10.1016/j.jcmg.2011.03.020] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Revised: 03/04/2011] [Accepted: 03/14/2011] [Indexed: 12/14/2022]
Abstract
There is an ever-increasing demand for new imaging methods that can provide additional information about the coronary wall to better characterize and stratify high-risk plaques, and to guide interventional and pharmacologic management of patients with coronary artery disease. While there are a number of imaging modalities that facilitate the assessment of coronary artery pathology, this review paper focuses on intravascular optical imaging modalities that provide information on the microstructural, compositional, biochemical, biomechanical, and molecular features of coronary lesions and stents. The optical imaging modalities discussed include angioscopy, optical coherence tomography, polarization sensitive-optical coherence tomography, laser speckle imaging, near-infrared spectroscopy, time-resolved laser induced fluorescence spectroscopy, Raman spectroscopy, and near-infrared fluorescence molecular imaging. Given the wealth of information that these techniques can provide, optical imaging modalities are poised to play an increasingly significant role in the evaluation of the coronary artery in the future.
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Affiliation(s)
- Melissa J. Suter
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Pulmonary and Critical Care Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Seemantini K. Nadkarni
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Pulmonary and Critical Care Unit, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Giora Weisz
- Center for Interventional Vascular Therapy, New York-Presbyterian Hospital, Columbia University, and Cardiovascular Research Foundation, New York, New York
| | - Atsushi Tanaka
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Farouc A. Jaffer
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Cardiovascular Research Center, Cardiology Division, and Center for Molecular Imaging Research, Massachusetts General Hospital, Harvard Medical School, Boston Massachusetts
| | - Brett E. Bouma
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts
| | - Guillermo J. Tearney
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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12
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Hajjarian Z, Xi J, Jaffer FA, Tearney GJ, Nadkarni SK. Intravascular laser speckle imaging catheter for the mechanical evaluation of the arterial wall. JOURNAL OF BIOMEDICAL OPTICS 2011; 16:026005. [PMID: 21361689 PMCID: PMC3056316 DOI: 10.1117/1.3533322] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Laser speckle imaging (LSI) is a novel technique for measuring the mechanical properties of atherosclerotic plaques. In LSI, the decorrelation time constant of speckle intensity fluctuations provides an index of viscoelasticity that is closely related to plaque microstructure and composition. Here, we demonstrate for the first time, the feasibility of conducting LSI in vivo using a prototype 1.5 mm (4.5 Fr) diameter intravascular catheter. Investigation of the catheter performance using human arterial samples ex vivo shows that plaque time constants measured by the LSI catheter correlate well with those measured using a free-space bulk optics system. To demonstrate LSI in vivo, the catheter is interfaced with a portable console for intravascular evaluation in the aorta of a living rabbit. Distinct differences in arterial time constants are identified at normal aortic and stented sites in vivo with intravascular LSI.
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Affiliation(s)
- Zeinab Hajjarian
- Massachusetts General Hospital, Wellman Center for Photomedicine, Harvard Medical School, Boston, Massachusetts 02114, USA
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13
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The year in intracoronary imaging. JACC Cardiovasc Imaging 2010; 3:881-91. [PMID: 20705271 DOI: 10.1016/j.jcmg.2010.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Revised: 04/26/2010] [Accepted: 05/13/2010] [Indexed: 11/20/2022]
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14
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Potter BK, Forsberg JA, Davis TA, Evans KN, Hawksworth JS, Tadaki D, Brown TS, Crane NJ, Burns TC, O'Brien FP, Elster EA. Heterotopic ossification following combat-related trauma. J Bone Joint Surg Am 2010; 92 Suppl 2:74-89. [PMID: 21123594 DOI: 10.2106/jbjs.j.00776] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Benjamin K Potter
- Walter Reed National Military Medical Center, Washington, DC 20307, USA.
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15
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Lee JY, Kim SH, Moon DW, Lee ES. Three-color multiplex CARS for fast imaging and microspectroscopy in the entire CHn stretching vibrational region. OPTICS EXPRESS 2009; 17:22281-95. [PMID: 20052151 DOI: 10.1364/oe.17.022281] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
We present a three-color multiplex coherent anti-Stokes Raman scattering (CARS) setup that facilitates a prompt recording of broadband CARS spectra along with a fast CARS imaging. With separate narrowband Stokes and probe beams being introduced in the near IR, we are able to incorporate a stable, wideband Ti:sapphire femtosecond laser as a pump beam that covers the full range of Raman shift for CHn stretching vibrational modes. Experimentally, high-resolution multiplex CARS signals are allowed to investigate molecular vibrations over the range of 2650 cm-1 - 3050 cm-1, which are spectrally integrated to construct lipid-sensitive images. It is demonstrated that the proposed implementation promises a particular benefit on CARS imaging of lipid-rich tissue structures by providing detailed information on CHn Raman-active vibrations at points of interest on the CARS images that can be obtained at high frame rates.
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Affiliation(s)
- Jae Yong Lee
- Division of Convergence Technology, Korea Research Institute of Standards and Science, 1 Doryong-dong, Yuseong-gu, Daejeon 305-340, Korea.
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