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Baria E, Morselli S, Anand S, Fantechi R, Nesi G, Gacci M, Carini M, Serni S, Cicchi R, Pavone FS. Label-free grading and staging of urothelial carcinoma through multimodal fibre-probe spectroscopy. JOURNAL OF BIOPHOTONICS 2019; 12:e201900087. [PMID: 31343832 DOI: 10.1002/jbio.201900087] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 06/07/2019] [Accepted: 07/23/2019] [Indexed: 06/10/2023]
Abstract
Urothelial carcinoma (UC) is the most common bladder tumour. Proper treatment requires tumour resection for diagnosing its grade (aggressiveness) and stage (invasiveness). White-light cystoscopy and histopathological examination are the gold standard procedures for clinical and histopathological diagnostics, respectively. However, cystoscopy is limited in terms of specificity, histology requires long tissue processing, both procedures rely on operator's experience. Multimodal optical spectroscopy can provide a powerful tool for detecting, staging and grading bladder tumours in a fast, reliable and label-free modality. In this study, we collected fluorescence, Raman and reflectance spectra from 50 biopsies obtained from 32 patients undergoing transurethral resection of bladder tumour using a multimodal fibre-probe. Principal component analysis allowed distinguishing normal from pathological tissues, as well as discriminating tumour stages and grades. Each individual spectroscopic technique provided high specificity and sensitivity in classifying all tissues; however, a multimodal approach resulted in a considerable increase in diagnostic accuracy (≥95%), which is of paramount importance for tumour grading and staging. The presented method offers the potential for being applied in cystoscopy and for providing an automated diagnosis of UC at the clinical level, with an improvement with respect to current state-of-the-art procedures.
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Affiliation(s)
- Enrico Baria
- National Institute of Optics, National Research Council, Sesto Fiorentino, Italy
| | - Simone Morselli
- Division of Urology, Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
| | - Suresh Anand
- National Institute of Optics, National Research Council, Sesto Fiorentino, Italy
| | - Riccardo Fantechi
- Division of Urology, Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
| | - Gabriella Nesi
- Division of Pathology, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - Mauro Gacci
- Division of Urology, Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
| | - Marco Carini
- Division of Urology, Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
| | - Sergio Serni
- Division of Urology, Department of Clinical and Experimental Medicine, University of Florence, Florence, Italy
| | - Riccardo Cicchi
- National Institute of Optics, National Research Council, Sesto Fiorentino, Italy
- European Laboratory for Non-Linear Spectroscopy, University of Florence, Sesto Fiorentino, Italy
| | - Francesco S Pavone
- National Institute of Optics, National Research Council, Sesto Fiorentino, Italy
- European Laboratory for Non-Linear Spectroscopy, University of Florence, Sesto Fiorentino, Italy
- Department of Physics, University of Florence, Sesto Fiorentino, Italy
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202
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Raghushaker CR, Chandra S, Chakrabarty S, Kabekkodu SP, Satyamoorthy K, Mahato KK. Detection of mitochondrial dysfunction in vitro by laser-induced autofluorescence. JOURNAL OF BIOPHOTONICS 2019; 12:e201900056. [PMID: 31251452 DOI: 10.1002/jbio.201900056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2019] [Revised: 06/26/2019] [Accepted: 06/27/2019] [Indexed: 06/09/2023]
Abstract
Mitochondrion plays a significant role in a variety of biological functions. Because of their diverse character and location in the cellular systems, mitochondria commonly get exposed to various extrinsic and intrinsic cellular stresses. The present study reports a novel approach to detection of mitochondrial dysfunction based on tryptophan autofluorescence of its proteins in mouse liver, using laser-induced fluorescence (LIF) as a tool. Mitochondria, isolated from the mouse liver, were initially tested for purity and integrity using lactate dehydrogenase and succinate dehydrogenase (SDH) assays. Mitochondrial stress was induced by treating the isolated mitochondria with heavy metals at 10 and 0.01 mM for sodium arsenite and mercuric chloride, respectively. Upon treatment with the heavy metal, tryptophan autofluorescence quenching was recorded at 281 nm excitation. The functional integrity of the mitochondria treated with heavy metals was evaluated by measuring SDH and cytochrome c oxidase activities at various concentrations of mitochondria, which showed impaired activity as compared to control upto a concentration of 6.25 μg. A significant shift was also observed in the autofluorescence of proteins upto the level below 1 μg, suggesting their conformational change and hence altered structural integrity of mitochondria. Circular dichroism spectroscopy data of the mitochondrial proteins treated with heavy metals further validates their conformational change as compared to untreated control. The present study clearly shows that the LIF can be a novel detection tool to detect altered structural integrity of cellular mitochondria upon stress, and it also possesses the potentiality to combine with other interdisciplinary modalities.
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Affiliation(s)
- Chandavalli R Raghushaker
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Subhash Chandra
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Sanjiban Chakrabarty
- Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Shama P Kabekkodu
- Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Kapaettu Satyamoorthy
- Department of Cell and Molecular Biology, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India
| | - Krishna K Mahato
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, India
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203
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Torres VC, Li C, He Y, Sinha L, Papavasiliou G, Sattar HA, Brankov JG, Tichauer KM. Angular restriction fluorescence optical projection tomography to localize micrometastases in lymph nodes. JOURNAL OF BIOMEDICAL OPTICS 2019; 24:1-4. [PMID: 31705637 PMCID: PMC6839382 DOI: 10.1117/1.jbo.24.11.110501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 10/14/2019] [Indexed: 06/10/2023]
Abstract
Lymph node biopsy is a primary means of staging breast cancer, yet standard pathological techniques are time-consuming and typically sample less than 1% of the total node volume. A low-cost fluorescence optical projection tomography (OPT) protocol is demonstrated for rapid imaging of whole lymph nodes in three dimensions. The relatively low scattering properties of lymph node tissue can be leveraged to significantly improve spatial resolution of lymph node OPT by employing angular restriction of photon detection. It is demonstrated through porcine lymph node metastases models that simple filtered-backprojection reconstruction is sufficient to detect and localize 200-μm-diameter metastases (the smallest clinically significant) in 1-cm-diameter lymph nodes.
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Affiliation(s)
- Veronica C. Torres
- Illinois Institute of Technology, Department of Biomedical Engineering, Chicago, Illinois, United States
| | - Chengyue Li
- Illinois Institute of Technology, Department of Biomedical Engineering, Chicago, Illinois, United States
| | - Yusheng He
- Illinois Institute of Technology, Department of Biomedical Engineering, Chicago, Illinois, United States
| | - Lagnojita Sinha
- Illinois Institute of Technology, Department of Biomedical Engineering, Chicago, Illinois, United States
| | - Georgia Papavasiliou
- Illinois Institute of Technology, Department of Biomedical Engineering, Chicago, Illinois, United States
| | - Husain A. Sattar
- University of Chicago, Department of Pathology, Chicago, Illinois, United States
| | - Jovan G. Brankov
- Illinois Institute of Technology, Department of Biomedical Engineering, Chicago, Illinois, United States
- Illinois Institute of Technology, Department of Electrical and Computer Engineering, Chicago, Illinois, United States
| | - Kenneth M. Tichauer
- Illinois Institute of Technology, Department of Biomedical Engineering, Chicago, Illinois, United States
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204
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Prenatal Zidovudine Treatment Modifies Early Development of Rat Osteoid - Confocal Microspectroscopy Analysis. J Fluoresc 2019; 29:1257-1263. [PMID: 31620936 PMCID: PMC6853851 DOI: 10.1007/s10895-019-02429-6] [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: 06/19/2019] [Accepted: 08/27/2019] [Indexed: 11/04/2022]
Abstract
Autofluorescence of the bone extracellular matrix (ECM) has not been widely explored although the ECM plays a very important role in bone development. In our research we focused on examining the bone matrix of very young animals due to the intense growth process during the first month of life. Structure images and fluorescence spectra of the bone surface were carried out using confocal fluorescence microscope Eclipse Ti-S inverted CLSM (NIKON, Japan) for compact tibia of healthy 7-, 14- and 28-day-old rat newborns after prenatal zidovudine administration in comparison with control. Spectral features of ECM autofluorescence were analyzed statistically by taking into consideration p < 0.05. The CLSM technique allows for simultaneous examination of the structure and autofluorescence from selected areas of the bone surface. Excessive autofluorescence of ECM after prenatal zidovudine administration influences bone growth incommensurably to the newborns’ age. Therefore the possibility of an additional non-enzymatic mechanism of collagen cross-linking in the first two weeks of life of newborn rats prenatally treated with zidovudine has been considered. Our results suggest that ECM autofluorescence can be an indicator of bone development in the normal and pathological state.
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205
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Najafiaghdam H, Papageorgiou E, Torquato NA, Tian B, Cohen BE, Anwar M. A 25 micron-thin microscope for imaging upconverting nanoparticles with NIR-I and NIR-II illumination. Theranostics 2019; 9:8239-8252. [PMID: 31754393 PMCID: PMC6857055 DOI: 10.7150/thno.37672] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 08/28/2019] [Indexed: 12/24/2022] Open
Abstract
Rationale: Intraoperative visualization in small surgical cavities and hard-to-access areas are essential requirements for modern, minimally invasive surgeries and demand significant miniaturization. However, current optical imagers require multiple hard-to-miniaturize components including lenses, filters and optical fibers. These components restrict both the form-factor and maneuverability of these imagers, and imagers largely remain stand-alone devices with centimeter-scale dimensions. Methods: We have engineered INSITE (Immunotargeted Nanoparticle Single-Chip Imaging Technology), which integrates the unique optical properties of lanthanide-based alloyed upconverting nanoparticles (aUCNPs) with the time-resolved imaging of a 25-micron thin CMOS-based (complementary metal oxide semiconductor) imager. We have synthesized core/shell aUCNPs of different compositions and imaged their visible emission with INSITE under either NIR-I and NIR-II photoexcitation. We characterized aUCNP imaging with INSITE across both varying aUCNP composition and 980 nm and 1550 nm excitation wavelengths. To demonstrate clinical experimental validity, we also conducted an intratumoral injection into LNCaP prostate tumors in a male nude mouse that was subsequently excised and imaged with INSITE. Results: Under the low illumination fluences compatible with live animal imaging, we measure aUCNP radiative lifetimes of 600 μs - 1.3 ms, which provides strong signal for time-resolved INSITE imaging. Core/shell NaEr0.6Yb0.4F4 aUCNPs show the highest INSITE signal when illuminated at either 980 nm or 1550 nm, with signal from NIR-I excitation about an order of magnitude brighter than from NIR-II excitation. The 55 μm spatial resolution achievable with this approach is demonstrated through imaging of aUCNPs in PDMS (polydimethylsiloxane) micro-wells, showing resolution of micrometer-scale targets with single-pixel precision. INSITE imaging of intratumoral NaEr0.8Yb0.2F4 aUCNPs shows a signal-to-background ratio of 9, limited only by photodiode dark current and electronic noise. Conclusion: This work demonstrates INSITE imaging of aUCNPs in tumors, achieving an imaging platform that is thinned to just a 25 μm-thin, planar form-factor, with both NIR-I and NIR-II excitation. Based on a highly paralleled array structure INSITE is scalable, enabling direct coupling with a wide array of surgical and robotic tools for seamless integration with tissue actuation, resection or ablation.
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Affiliation(s)
- Hossein Najafiaghdam
- Department of Electrical Engineering and Computer Sciences, University of California Berkeley, Berkeley CA
| | - Efthymios Papageorgiou
- Department of Electrical Engineering and Computer Sciences, University of California Berkeley, Berkeley CA
| | - Nicole A Torquato
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA
| | - Bining Tian
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA
| | - Bruce E Cohen
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA
| | - Mekhail Anwar
- Department of Radiation Oncology, University of California San Francisco, San Francisco, CA
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206
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Chacko JV, Eliceiri KW. NAD(P)H fluorescence lifetime measurements in fixed biological tissues. Methods Appl Fluoresc 2019; 7:044005. [PMID: 31553966 DOI: 10.1088/2050-6120/ab47e5] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Autofluorescence based fluorescence lifetime imaging microscopy (AF-FLIM) techniques have come a long way from early studies on cancer characterization and have now been widely employed in several cellular and animal studies covering a wide range of diseases. The majority of research in autofluorescence imaging (AFI) study metabolic fluxes in live biological samples. However, tissues from clinical or scientific studies are often chemically fixed for preservation and stabilization of tissue morphology. Fixation is particularly crucial for enzymatic, functional, or histopathology studies. Interpretations of metabolic imaging such as optical redox intensity imaging and AF-FLIM, have often been viewed as potentially unreliable in a fixed sample due to lack of studies in this field. In this study, we carefully evaluate the possibility of extracting microenvironment information in fixed tissues using reduced nicotinamide adenine dinucleotide (phosphate) (NAD(P)H) endogenous fluorescence. The ability to distinguish changes such as metabolism and pH using intrinsic fluorescence in fixed tissues has great pathological value. In this work, we show that the lifetime based metabolic contrast in a sample is preserved after chemical fixation. The fluorescence lifetime of a sample increases with an additive fixative like formaldehyde; however, the fixed tissues retain metabolic signatures even after fixation. This study presents an opportunity to successfully image archived unstained histopathology tissues, and generate useful AF-FLIM signatures. We demonstrate the capability to draw metabolic interpretations in fixed tissues even after long periods of storage.
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Affiliation(s)
- Jenu V Chacko
- Laboratory for Optical and Computational Instrumentation, U. Wisconsin at Madison, Madison WI, United States of America
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207
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Xie H, Su H, Chen D, Xie D, Dai C, Ren Y, She Y, Xu L, Zhao S, Wu C, Jiang G, Chen C. Use of Autofluorescence to Intraoperatively Diagnose Visceral Pleural Invasion From Frozen Sections in Patients With Lung Adenocarcinoma 2 cm or Less. Am J Clin Pathol 2019; 152:608-615. [PMID: 31305894 DOI: 10.1093/ajcp/aqz081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVES We prospectively investigate the accuracy of frozen sections for diagnosing visceral pleural invasion (VPI) by autofluorescence and evaluated its usefulness in sublobar resection. METHODS We included patients with lung adenocarcinoma 2 cm or less to evaluate the diagnostic performance of autofluorescence for VPI in frozen sections via a fluorescence microscope. Furthermore, the impact of VPI on patients treated with sublobar resection was assessed in another cohort. RESULTS A total of 112 patients were enrolled. The accuracy, sensitivity, and specificity of autofluorescence for VPI diagnosis was 95.5%, 86.8%, and 100%, respectively. Sublobar resection was an independent risk factor for recurrence in patients with lung adenocarcinomas 2 cm or less with VPI positivity (hazard ratio, 3.30; P = .023), whereas it was not in those with VPI negativity. CONCLUSIONS Using autofluorescence in frozen sections appears to be an accurate method for diagnosing VPI, which is helpful for surgical decision making.
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Affiliation(s)
- Huikang Xie
- Department of Pathology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hang Su
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Donglai Chen
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Dong Xie
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chenyang Dai
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yijiu Ren
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yunlang She
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Long Xu
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shengnan Zhao
- Department of Pathology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chunyan Wu
- Department of Pathology, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Gening Jiang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chang Chen
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, China
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208
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Li Y, Deng L, Yang X, Liu Z, Zhao X, Huang F, Zhu S, Chen X, Chen Z, Zhang W. Early diagnosis of gastric cancer based on deep learning combined with the spectral-spatial classification method. BIOMEDICAL OPTICS EXPRESS 2019; 10:4999-5014. [PMID: 31646025 PMCID: PMC6788605 DOI: 10.1364/boe.10.004999] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 08/23/2019] [Accepted: 09/03/2019] [Indexed: 05/03/2023]
Abstract
The development of an objective and rapid method that can be used for the early diagnosis of gastric cancer has important clinical application value. In this study, the fluorescence hyperspectral imaging technique was used to acquire fluorescence spectral images. Deep learning combined with spectral-spatial classification methods based on 120 fresh tissues samples that had a confirmed diagnosis by histopathological examinations was used to automatically identify and extract the "spectral + spatial" features to construct an early diagnosis model of gastric cancer. The model results showed that the overall accuracy for the nonprecancerous lesion, precancerous lesion, and gastric cancer groups was 96.5% with specificities of 96.0%, 97.3%, and 96.7% and sensitivities of 97.0%, 96.3%, and 96.6%, respectively. Therefore, the proposed method can increase the diagnostic accuracy and is expected to be a new method for the early diagnosis of gastric cancer.
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Affiliation(s)
- Yuanpeng Li
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangdong, Guangzhou, 510632, China
- College of physical science and technology, Guangxi Normal University, Guangxi, Guilin, 541004, China
| | - Liangyu Deng
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangdong, Guangzhou, 510632, China
| | - Xinhao Yang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangdong, Guangzhou, 510632, China
| | - Zhao Liu
- Department of Gastroenterology and Endocrinology, The 74th Group Army Hospital of People's Liberation Army, Guangdong, Guangzhou, 510318, China
| | - Xiaoping Zhao
- Department of Gastroenterology and Endocrinology, The 74th Group Army Hospital of People's Liberation Army, Guangdong, Guangzhou, 510318, China
| | - Furong Huang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangdong, Guangzhou, 510632, China
| | - Siqi Zhu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangdong, Guangzhou, 510632, China
| | - Xingdan Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangdong, Guangzhou, 510632, China
| | - Zhenqiang Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Department of Optoelectronic Engineering, Jinan University, Guangdong, Guangzhou, 510632, China
| | - Weimin Zhang
- Department of Gastroenterology and Endocrinology, The 74th Group Army Hospital of People's Liberation Army, Guangdong, Guangzhou, 510318, China
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209
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Boppart SA, You S, Li L, Chen J, Tu H. Simultaneous label-free autofluorescence-multiharmonic microscopy and beyond. APL PHOTONICS 2019; 4:100901. [PMID: 33585678 PMCID: PMC7880241 DOI: 10.1063/1.5098349] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 08/21/2019] [Indexed: 05/19/2023]
Abstract
Without sophisticated data inversion algorithms, nonlinear optical microscopy can acquire images at subcellular resolution and relatively large depth, with plausible endogenous contrasts indicative of authentic biological and pathological states. Although independent contrasts have been derived by sequentially imaging the same sample plane or volume under different and often optimized excitation conditions, new laser source engineering with inputs from key biomolecules surprisingly enable real-time simultaneous acquisition of multiple endogenous molecular contrasts to segment a rich set of cellular and extracellular components. Since this development allows simple single-beam single-shot excitation and simultaneous multicontrast epidirected signal detection, the resulting platform avoids perturbative sample pretreatments such as fluorescent labeling, mechanical sectioning, scarce or interdependent contrast generation, constraints to the sample or imaging geometry, and intraimaging motion artifacts that have limited in vivo nonlinear optical molecular imaging.
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Affiliation(s)
- Stephen A. Boppart
- Biophotonics Imaging Laboratory, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Sixian You
- Biophotonics Imaging Laboratory, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Lianhuang Li
- 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
| | - Haohua Tu
- Biophotonics Imaging Laboratory, Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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210
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Chang Z, Liu F, Wang L, Deng M, Zhou C, Sun Q, Chu J. Near-infrared dyes, nanomaterials and proteins. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.08.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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211
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Li C, Alfonso-Garcia A, McMasters J, Bec J, Weyers B, Uyesaka L, Griffiths L, Panitch A, Marcu L. Simultaneous intraluminal imaging of tissue autofluorescence and eGFP-labeled cells in engineered vascular grafts inside a bioreactor. Methods Appl Fluoresc 2019; 7:044003. [PMID: 31505471 DOI: 10.1088/2050-6120/ab4342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The growing demand for tissue engineered vascular grafts (TEVG) motivates the development of optimized fabrication and monitoring procedures. Bioreactors which provide physiologically-relevant conditions are important for improving holistic TEVG properties and performance. Herein we describe a fiber-based intraluminal imaging system that allows for in situ assessment of vascular materials and re-cellularization processes inside a bioreactor by simultaneous and co-registered measurements of endogenous fluorescence lifetime and exogenous marker fluorescence intensity. The lumen of 6 vascular grafts (∼4 mm diameter) were scanned by reciprocally rotating a 41° angle polished multimode optical fiber inside a protective glass tube with outer diameter of 3 mm. Tubular bovine pericardium constructs were recellularized using enhanced Green Fluorescent Protein (eGFP) transfected cells in a custom bioreactor. The imaging system has resolved consistently the cellular autofluorescence from that of tissue matrix in situ based on the lifetime fluorescence properties of endogenous molecular species. The location of the re-cellularized area was validated by the eGFP emission. Current results demonstrate the potential of this system as a valuable tool in tissue engineering for in situ studies of cell-tissue interactions in cylindrical or other 3-dimensional structures.
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Affiliation(s)
- Cai Li
- Department of Material Science and Engineering, University of California, Davis, United States of America
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212
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Klein SP, De Sloovere V, Meyfroidt G, Depreitere B. Autoregulation assessment by direct visualisation of pial arterial blood flow in the piglet brain. Sci Rep 2019; 9:13333. [PMID: 31527671 PMCID: PMC6746693 DOI: 10.1038/s41598-019-50046-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 09/04/2019] [Indexed: 12/22/2022] Open
Abstract
Impairment of cerebrovascular autoregulation (CAR) is common after brain injury, although the pathophysiology remains elusive. The mechanisms of vascular dysregulation, their impact on brain function, and potential therapeutic implications are still incompletely understood. Clinical assessment of CAR remains challenging. Observational studies suggest that CAR impairment is associated with worse outcomes, and that optimization of cerebral blood flow (CBF) by individual arterial blood pressure (ABP) targets could potentially improve outcome. We present a porcine closed cranial window model that measures the hemodynamic response of pial arterioles, the main site of CBF control, based on changes in their diameter and red blood cell velocity. This quantitative direct CAR assessment is compared to laser Doppler flow (LDF). CAR breakpoints are determined by segmented regression analysis and validated using LDF and brain tissue oxygen pressure. Using a standardized cortical impact, CAR impairment in traumatic brain injury can be studied using our method of combining pial arteriolar diameter and RBC velocity to quantify RBC flux in a large animal model. The model has numerous potential applications to investigate CAR physiology and pathophysiology of CAR impairment after brain injury, the impact of therapeutic interventions, drugs, and other confounders, or to develop personalized ABP management strategies.
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Affiliation(s)
- S P Klein
- Department of Neurosurgery, University Hospitals Leuven, Leuven, Belgium.
| | - V De Sloovere
- Department of Anesthesiology, University Hospitals Leuven, Leuven, Belgium
| | - G Meyfroidt
- Department of Intensive Care Medicine, University Hospitals Leuven, Leuven, Belgium
| | - B Depreitere
- Department of Neurosurgery, University Hospitals Leuven, Leuven, Belgium
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213
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DiMarco A, Chotalia R, Bloxham R, McIntyre C, Tolley N, Palazzo FF. Does fluoroscopy prevent inadvertent parathyroidectomy in thyroid surgery? Ann R Coll Surg Engl 2019; 101:508-513. [PMID: 31305127 PMCID: PMC6667958 DOI: 10.1308/rcsann.2019.0065] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2019] [Indexed: 01/26/2023] Open
Abstract
INTRODUCTION Near-infrared imaging may facilitate intraoperative identification of parathyroid glands by causing autofluorescence but its clinical value has not been established. Inadvertent parathyroidectomy occurs in 5-22% of thyroidectomies and is associated with temporary and permanent hypoparathyroidism. The aim of this study was to determine whether near-infrared imaging prevents inadvertent parathyroidectomy and early hypocalcaemia as a surrogate for permanent hypoparathyroidism. MATERIALS AND METHODS Near-infrared imaging was used in a prospective cohort of consecutive thyroidectomies. Thyroidectomies performed prior to the introduction of near-infrared imaging formed a control group. The thyroid bed and specimen were scanned with near-infrared imaging. Areas of autofluorescence on the specimen were examined and any parathyroid tissue found was autotransplanted. Inadvertent parathyroidectomy was therefore recorded as established intraoperatively by near-infrared imaging (allowing autotransplantation) or on subsequent histology (missed). Serum calcium and parathyroid hormone were measured on day one and at two weeks and six months postoperatively. RESULTS A total of 269 patients were included: 106 near-infrared imaging and 163 controls. Inadvertent parathyroidectomy was detected by near-infrared imaging in two (and autotransplantation performed) and histologically (i.e. missed by near-infrared imaging in 13, 12.3% vs 17, 10.4% controls). Neither result was statistically significant (P = 0.08, 0.89). There was no significant difference in serum calcium or parathyroid hormone between near-infrared imaging and control groups at one day, two weeks or thereafter. DISCUSSION Near-infrared imaging may detect inadvertent parathyroidectomy and may allow autotransplantation. It did not, however, reduce the incidence of missed inadvertent parathyroidectomy and no difference was seen in early hypocalcaemia or late hypoparathyroidism. Current near-infrared imaging technology does not appear to confer a clinical benefit sufficient to justify its use.
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Affiliation(s)
- A DiMarco
- Department of Endocrine Surgery, Hammersmith Hospital, London, UK
- Department of Surgery and Cancer, Imperial College, London, UK
| | - R Chotalia
- Department of Endocrine Surgery, Hammersmith Hospital, London, UK
| | - R Bloxham
- Department of Endocrine Surgery, Hammersmith Hospital, London, UK
| | - C McIntyre
- Department of Endocrine Surgery, Hammersmith Hospital, London, UK
- Department of Surgery and Cancer, Imperial College, London, UK
| | - N Tolley
- Department of Endocrine Surgery, Hammersmith Hospital, London, UK
- Department of Surgery and Cancer, Imperial College, London, UK
| | - FF Palazzo
- Department of Endocrine Surgery, Hammersmith Hospital, London, UK
- Department of Surgery and Cancer, Imperial College, London, UK
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214
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Monroe JD, Belekov E, Er AO, Smith ME. Anticancer Photodynamic Therapy Properties of Sulfur-Doped Graphene Quantum Dot and Methylene Blue Preparations in MCF-7 Breast Cancer Cell Culture. Photochem Photobiol 2019; 95:1473-1481. [PMID: 31230353 DOI: 10.1111/php.13136] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 06/11/2019] [Indexed: 12/24/2022]
Abstract
Photodynamic therapy (PDT) is a field with many applications including chemotherapy. Graphene quantum dots (GQDs) exhibit a variety of unique properties and can be used in PDT to generate singlet oxygen that destroys pathogenic bacteria and cancer cells. The PDT agent, methylene blue (MB), like GQDs, has been successfully exploited to destroy bacteria and cancer cells by increasing reactive oxygen species generation. Recently, combinations of GQDs and MB have been shown to destroy pathogenic bacteria via increased singlet oxygen generation. Here, we performed a spectrophotometric assay to detect and measure the uptake of GQDs, MB and several GQD-MB combinations in MCF-7 breast cancer cells. Then, we used a cell counting method to evaluate the cytotoxicity of GQDs, MB and a 1:1 GQD:MB preparation. Singlet oxygen generation in cells was then detected and measured using singlet oxygen sensor green. The dye, H2 DCFDA, was used to measure reactive oxygen species production. We found that GQD and MB uptake into MCF-7 cells occurred, but that MB, followed by 1:1 GQD:MB, caused superior cytotoxicity and singlet oxygen and reactive oxygen species generation. Our results suggest that methylene blue's effect against MCF-7 cells is not potentiated by GQDs, either in light or dark conditions.
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Affiliation(s)
- Jerry D Monroe
- Department of Biology, Western Kentucky University, Bowling Green, KY
| | - Ermek Belekov
- Department of Physics & Astronomy, Western Kentucky University, Bowling Green, KY
| | - Ali Oguz Er
- Department of Physics & Astronomy, Western Kentucky University, Bowling Green, KY
| | - Michael E Smith
- Department of Biology, Western Kentucky University, Bowling Green, KY
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215
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Bourbousson M, Soomro I, Baldwin D, Notingher I. Ex vivo Raman spectroscopy mapping of lung tissue: label-free molecular characterization of nontumorous and cancerous tissues. J Med Imaging (Bellingham) 2019; 6:036001. [PMID: 31403055 DOI: 10.1117/1.jmi.6.3.036001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 07/16/2019] [Indexed: 12/24/2022] Open
Abstract
Raman spectroscopy mapping was used to study ex vivo fresh lung tissues and compare to histology sections. The Raman mapping measurements revealed differences in the molecular composition of normal lung tissue, adenocarcinoma, and squamous cell carcinoma (SCC). Molecular heterogeneity of the tissue samples was well captured by the k -means clustering analysis of the Raman datasets, as confirmed by the correlation with the adjacent haematoxylin and eosin (H&E) stained tissue sections. The results indicate that the fluorescence background varies considerably even in samples that appear structurally uniform in the H&E images, both for normal and tumor tissue. The results show that characteristic Raman bands can be used to discriminate between tumorous and nontumorous lung tissues and between adenocarcinoma and SCC tissues. These results indicate the potential to develop Raman classifications models for lung tissues based on the Raman spectral differences at the microscopic level, which can be used for tissue diagnosis or treatment stratification.
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Affiliation(s)
- Manon Bourbousson
- University of Nottingham, School of Physics and Astronomy, Nottingham, United Kingdom
| | - Irshad Soomro
- Nottingham University Hospitals NHS Trust, Histopathology Department, Nottingham, United Kingdom
| | - David Baldwin
- Nottingham University Hospitals NHS Trust, Department of Respiratory Medicine, Nottingham, United Kingdom
| | - Ioan Notingher
- University of Nottingham, School of Physics and Astronomy, Nottingham, United Kingdom
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216
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Yakimov BP, Gogoleva MA, Semenov AN, Rodionov SA, Novoselova MV, Gayer AV, Kovalev AV, Bernakevich AI, Fadeev VV, Armaganov AG, Drachev VP, Gorin DA, Darvin ME, Shcheslavskiy VI, Budylin GS, Priezzhev AV, Shirshin EA. Label-free characterization of white blood cells using fluorescence lifetime imaging and flow-cytometry: molecular heterogeneity and erythrophagocytosis [Invited]. BIOMEDICAL OPTICS EXPRESS 2019; 10:4220-4236. [PMID: 31453006 PMCID: PMC6701549 DOI: 10.1364/boe.10.004220] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/13/2019] [Accepted: 07/13/2019] [Indexed: 05/05/2023]
Abstract
Blood cell analysis is one of the standard clinical tests. Despite the widespread use of exogenous markers for blood cell quantification, label-free optical methods are still of high demand due to their possibility for in vivo application and signal specific to the biochemical state of the cell provided by native fluorophores. Here we report the results of blood cell characterization using label-free fluorescence imaging techniques and flow-cytometry. Autofluorescence parameters of different cell types - white blood cells, red blood cells, erythrophagocytic cells - are assessed and analyzed in terms of molecular heterogeneity and possibilities of differentiation between different cell types in vitro and in vivo.
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Affiliation(s)
- Boris P. Yakimov
- Faculty of Physics, Lomonosov Moscow State University, Leninskie gory 1/2, 119991, Moscow, Russia
| | - Maria A. Gogoleva
- Faculty of Physics, Lomonosov Moscow State University, Leninskie gory 1/2, 119991, Moscow, Russia
| | - Alexey N. Semenov
- Faculty of Physics, Lomonosov Moscow State University, Leninskie gory 1/2, 119991, Moscow, Russia
| | - Sergey A. Rodionov
- N.N. Priorov Central Institute for Traumatology and Orthopedics, Priorova str. 10, 127299, Moscow, Russia
| | - Marina V. Novoselova
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Nobel st, Building 3, Moscow, 121205, Russia
| | - Alexey V. Gayer
- Faculty of Physics, Lomonosov Moscow State University, Leninskie gory 1/2, 119991, Moscow, Russia
| | - Alexey V. Kovalev
- N.N. Priorov Central Institute for Traumatology and Orthopedics, Priorova str. 10, 127299, Moscow, Russia
| | - Alexey I. Bernakevich
- N.N. Priorov Central Institute for Traumatology and Orthopedics, Priorova str. 10, 127299, Moscow, Russia
| | - Victor V. Fadeev
- Faculty of Physics, Lomonosov Moscow State University, Leninskie gory 1/2, 119991, Moscow, Russia
| | - Artashes G. Armaganov
- Lomonosov Moscow State University Clinic, Lomonosovsky Prospect 27/10, Moscow, 119991, Russia
| | - Vladimir P. Drachev
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Nobel st, Building 3, Moscow, 121205, Russia
- Department of Physics, University of North Texas, Denton, TX 76203, USA
| | - Dmitry A. Gorin
- Center for Photonics and Quantum Materials, Skolkovo Institute of Science and Technology, Skolkovo Innovation Center, Nobel st, Building 3, Moscow, 121205, Russia
| | - Maxim E. Darvin
- Charité–Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Dermatology, Venerology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charitéplatz 1, 10117 Berlin, Germany
| | | | - Gleb S. Budylin
- National Research University Higher School of Economics, Faculty of Physics, 101000 Moscow, Russia
| | - Alexander V. Priezzhev
- Faculty of Physics, Lomonosov Moscow State University, Leninskie gory 1/2, 119991, Moscow, Russia
| | - Evgeny A. Shirshin
- Faculty of Physics, Lomonosov Moscow State University, Leninskie gory 1/2, 119991, Moscow, Russia
- Institute of Spectroscopy of the Russian Academy of Sciences, Fizicheskaya Str., 5, 108840, Troitsk, Moscow, Russia
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217
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Validation of a death assay for Angiostrongylus cantonensis larvae (L3) using propidium iodide in a rat model (Rattus norvegicus). Parasitology 2019; 146:1421-1428. [DOI: 10.1017/s0031182019000908] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
AbstractAngiostrongylus cantonensis is a pathogenic nematode and the cause of neuroangiostrongyliasis, an eosinophilic meningitis more commonly known as rat lungworm disease. Transmission is thought to be primarily due to ingestion of infective third stage larvae (L3) in gastropods, on produce, or in contaminated water. The gold standard to determine the effects of physical and chemical treatments on the infectivity of A. cantonensis L3 larvae is to infect rodents with treated L3 larvae and monitor for infection, but animal studies are laborious and expensive and also raise ethical concerns. This study demonstrates propidium iodide (PI) to be a reliable marker of parasite death and loss of infective potential without adversely affecting the development and future reproduction of live A. cantonensis larvae. PI staining allows evaluation of the efficacy of test substances in vitro, an improvement upon the use of lack of motility as an indicator of death. Some potential applications of this assay include determining the effectiveness of various anthelmintics, vegetable washes, electromagnetic radiation and other treatments intended to kill larvae in the prevention and treatment of neuroangiostrongyliasis.
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218
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Dos Santos NV, Saponi CF, Greaves TL, Pereira JFB. Revealing a new fluorescence peak of the enhanced green fluorescent protein using three-dimensional fluorescence spectroscopy. RSC Adv 2019; 9:22853-22858. [PMID: 35514499 PMCID: PMC9067124 DOI: 10.1039/c9ra02567g] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 07/16/2019] [Indexed: 11/21/2022] Open
Abstract
Fluorescent proteins have many applications as biomarkers and biosensors in the medical and biological fields. Their success was largely supported by modifications of the first isolated fluorescent protein, the wild-type Green Fluorescent Protein (wtGFP), which allowed the development of improved variants such as the Enhanced GFP (EGFP). The first reports on EGFP indicated that the protein presented a single form and fluorescence peak, in contrast to the two conformations observed in wtGFP. However, after experimental determination of the crystalline structure of EGFP, two conformations were found, generating questions regarding the relationship between EGFP structure and its spectral characteristics. To resolve the controversy, this study evaluated EGFP 3D fluorescence spectra at lower wavelengths and under distinct conditions (different concentrations, pH and temperatures), revealing the existence of a second fluorescence peak for this protein. It was possible to confirm that the new peak was not a reflection of the intrinsic fluorescence of proteins or an artefact from the 3D fluorescence spectroscopy. It was also shown that the second peak is pH dependent, sensitive to high temperatures and linearly related to EGFP concentration, confirming a direct relationship between the new fluorescence peak and EGFP protein structure. In addition to the revelation of the new EGFP fluorescence peak, this study demonstrated that 3D fluorescence can be used as powerful technique in the discovery of other elusive fluorophores. Three-dimensional fluorescence spectroscopy as a powerful tool to identify a new fluorescence peak of Enhanced Green Fluorescent Protein (EGFP).![]()
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Affiliation(s)
- Nathalia Vieira Dos Santos
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP) Rodovia Araraquara-Jaú/Km 01 14800-903 Araraquara SP Brazil +55-16-3301-4675.,School of Science, College of Science, Engineering and Health, Royal Melbourne Institute of Technology 124 La Trobe Street 3000 Melbourne VIC Australia
| | - Carolina Falaschi Saponi
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP) Rodovia Araraquara-Jaú/Km 01 14800-903 Araraquara SP Brazil +55-16-3301-4675.,School of Science, College of Science, Engineering and Health, Royal Melbourne Institute of Technology 124 La Trobe Street 3000 Melbourne VIC Australia
| | - Tamar Louise Greaves
- School of Science, College of Science, Engineering and Health, Royal Melbourne Institute of Technology 124 La Trobe Street 3000 Melbourne VIC Australia
| | - Jorge Fernando Brandão Pereira
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP) Rodovia Araraquara-Jaú/Km 01 14800-903 Araraquara SP Brazil +55-16-3301-4675
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219
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Belykh E, Miller EJ, Carotenuto A, Patel AA, Cavallo C, Martirosyan NL, Healey DR, Byvaltsev VA, Scheck AC, Lawton MT, Eschbacher JM, Nakaji P, Preul MC. Progress in Confocal Laser Endomicroscopy for Neurosurgery and Technical Nuances for Brain Tumor Imaging With Fluorescein. Front Oncol 2019; 9:554. [PMID: 31334106 PMCID: PMC6616132 DOI: 10.3389/fonc.2019.00554] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 06/06/2019] [Indexed: 12/12/2022] Open
Abstract
Background: Previous studies showed that confocal laser endomicroscopy (CLE) images of brain tumors acquired by a first-generation (Gen1) CLE system using fluorescein sodium (FNa) contrast yielded a diagnostic accuracy similar to frozen surgical sections and histologic analysis. We investigated performance improvements of a second-generation (Gen2) CLE system designed specifically for neurosurgical use. Methods: Rodent glioma models were used for in vivo and rapid ex vivo CLE imaging. FNa and 5-aminolevulinic acid were used as contrast agents. Gen1 and Gen2 CLE images were compared to distinguish cytoarchitectural features of tumor mass and margin and surrounding and normal brain regions. We assessed imaging parameters (gain, laser power, brightness, scanning speed, imaging depth, and Z-stack [3D image acquisition]) and evaluated optimal values for better neurosurgical imaging performance with Gen2. Results: Efficacy of Gen1 and Gen2 was similar in identifying normal brain tissue, vasculature, and tumor cells in masses or at margins. Gen2 had smaller field of view, but higher image resolution, and sharper, clearer images. Other advantages of the Gen2 were auto-brightness correction, user interface, image metadata handling, and image transfer. CLE imaging with FNa allowed identification of nuclear and cytoplasmic contours in tumor cells. Injection of higher dosages of FNa (20 and 40 mg/kg vs. 0.1–8 mg/kg) resulted in better image clarity and structural identification. When used with 5-aminolevulinic acid, CLE was not able to detect individual glioma cells labeled with protoporphyrin IX, but overall fluorescence intensity was higher (p < 0.01) than in the normal hemisphere. Gen2 Z-stack imaging allowed a unique 3D image volume presentation through the focal depth. Conclusion: Compared with Gen1, advantages of Gen2 CLE included a more responsive and intuitive user interface, collection of metadata with each image, automatic Z-stack imaging, sharper images, and a sterile sheath. Shortcomings of Gen2 were a slightly slower maximal imaging speed and smaller field of view. Optimal Gen2 imaging parameters to visualize brain tumor cytoarchitecture with FNa as a fluorescent contrast were defined to aid further neurosurgical clinical in vivo and rapid ex vivo use. Further validation of the Gen2 CLE for microscopic visualization and diagnosis of brain tumors is ongoing.
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Affiliation(s)
- Evgenii Belykh
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States.,Department of Neurosurgery, Irkutsk State Medical University, Irkutsk, Russia
| | - Eric J Miller
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Alessandro Carotenuto
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Arpan A Patel
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Claudio Cavallo
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Nikolay L Martirosyan
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Debbie R Healey
- Department of Neuro-Oncology Research, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Vadim A Byvaltsev
- Department of Neurosurgery, Irkutsk State Medical University, Irkutsk, Russia
| | - Adrienne C Scheck
- Department of Neuro-Oncology Research, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Michael T Lawton
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Jennifer M Eschbacher
- Department of Neuropathology, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Peter Nakaji
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
| | - Mark C Preul
- Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, United States
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220
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Giovannacci I, Magnoni C, Vescovi P, Painelli A, Tarentini E, Meleti M. Which are the main fluorophores in skin and oral mucosa? A review with emphasis on clinical applications of tissue autofluorescence. Arch Oral Biol 2019; 105:89-98. [PMID: 31299549 DOI: 10.1016/j.archoralbio.2019.07.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 07/01/2019] [Accepted: 07/02/2019] [Indexed: 10/26/2022]
Abstract
OBJECTIVES The present review provides information about which molecules appear to be the main fluorophores in skin and oral mucosa, together with their clinical applications. DESIGN The MEDLINE database was searched, using "oral mucosa AND fluorophores", "skin AND fluorophores", "epidermal AND fluorophores", "dermal AND fluorophores" and "cutaneous AND fluorophores" as entry terms. We searched the literature following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The level of evidence in the studies was assessed using the Classification of the Oxford Centre for Evidence-based Medicine (CEBM) Levels for Diagnosis. RESULTS Five papers and 17 were primarily focused on description of fluorophores in oral mucosa and skin Evidence exists that fluorophores of oral mucosa and skin are mainly proteins such as collagen, elastin, keratin and tryptophan. Other possible fluorophores identified are: porphyrins, advanced glycation end products, flavins, lipopigment, nicotinamide adenine dinucleotide, flavin adenine dinucleotide, pheomelanin, eumelanin and components of lipofuscin. Clinical applications of oral mucosal autofluorescence (AF) are related to management of malignant and potentially malignant lesions. In the skin, AF has been used for acne assessment, diagnosis of sweat-gland pathologies, glycemic control and management of malignant lesions and as a marker for skin aging. CONCLUSION Fluorophores stimulated through AF devices are implied in different physiologic and pathologic processes. AF seems to be useful for several clinical applications, especially in skin department. Because most of the studies show a low level of evidence, further studies are necessary in such a promising and fascinating field.
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Affiliation(s)
- I Giovannacci
- Clinical and Experimental Medicine PhD Program, University of Modena and Reggio Emilia, Modena, Italy.
| | - C Magnoni
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy
| | - P Vescovi
- Centro Universitario di Odontoiatria, Department of Medicine and Surgery, Oral Medicine and Laser Surgery Unit, University of Parma, Parma, Italy
| | - A Painelli
- Department of Chemistry, Life Science and Environmental Sustainability, University of Parma, Parma, Italy
| | - E Tarentini
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy
| | - M Meleti
- Centro Universitario di Odontoiatria, Department of Medicine and Surgery, Oral Medicine and Laser Surgery Unit, University of Parma, Parma, Italy
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221
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Rakotomanga P, Soussen C, Khairallah G, Amouroux M, Zaytsev S, Genina E, Chen H, Delconte A, Daul C, Tuchin V, Blondel W. Source separation approach for the analysis of spatially resolved multiply excited autofluorescence spectra during optical clearing of ex vivo skin. BIOMEDICAL OPTICS EXPRESS 2019; 10:3410-3424. [PMID: 31467786 PMCID: PMC6706026 DOI: 10.1364/boe.10.003410] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/29/2019] [Accepted: 05/29/2019] [Indexed: 05/19/2023]
Abstract
Spatially resolved multiply excited autofluorescence spectroscopy is a valuable optical biopsy technique to investigate skin UV-visible optical properties in vivo in clinics. However, it provides bulk fluorescence signals from which the individual endogenous fluorophore contributions need to be disentangled. Skin optical clearing allows for increasing tissue transparency, thus providing access to more accurate in-depth information. The aim of the present contribution was to study the time changes in skin spatially resolved and multiply excited autofluorescence spectra during skin optical clearing. The latter spectra were acquired on an ex vivo human skin strip lying on a fluorescent gel substrate during 37 minutes of the optical clearing process of a topically applied sucrose-based solution. A Non Negative Matrix Factorization-based blind source separation approach was proposed to unmix skin tissue intrinsic fluorophore contributions and to analyze the time evolution of this mixing throughout the optical clearing process. This spectral unmixing exploited the multidimensionality of the acquired data, i.e., spectra resolved in five excitation wavelengths, four source-to-detector separations, and eight measurement times. Best fitting results between experimental and estimated spectra were obtained for optimal numbers of 3 and 4 sources. These estimated spectral sources exhibited common identifiable shapes of fluorescence emission spectra related to the fluorescent gel substrate and to known skin intrinsic fluorophores matching namely dermis collagen/elastin and epidermis flavins. The time analysis of the fluorophore contributions allowed us to highlight how the clearing process towards the deepest skin layers impacts skin autofluorescence through time, namely with a strongest contribution to the bulk autofluorescence signal of dermis collagen (respectively epidermis flavins) fluorescence at shortest (respectively longest) excitation wavelengths and longest (respectively shortest) source-to-detector separations.
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Affiliation(s)
- Prisca Rakotomanga
- Université de Lorraine, CNRS, CRAN UMR 7039, Vandoeuvre-lès-Nancy, 54500,
France
| | - Charles Soussen
- CentraleSupélec, CNRS, Université Paris-Sud, L2S UMR 8506, Gif-sur-Yvette, 91190,
France
| | - Grégoire Khairallah
- Université de Lorraine, CNRS, CRAN UMR 7039, Vandoeuvre-lès-Nancy, 54500,
France
- Metz-Thionville Regional Hospital, Department of plastic, aesthetic and reconstructive surgery, Ars-Laquenexy, 57530,
France
| | - Marine Amouroux
- Université de Lorraine, CNRS, CRAN UMR 7039, Vandoeuvre-lès-Nancy, 54500,
France
| | - Sergey Zaytsev
- Université de Lorraine, CNRS, CRAN UMR 7039, Vandoeuvre-lès-Nancy, 54500,
France
- Saratov State University, 83, Astrakhanskaya Str., Saratov, 410012,
Russia
| | - Elina Genina
- Saratov State University, 83, Astrakhanskaya Str., Saratov, 410012,
Russia
- Tomsk State University, 36 Lenin Avenue, Tomsk, 634050,
Russia
| | - Hang Chen
- Université de Lorraine, CNRS, CRAN UMR 7039, Vandoeuvre-lès-Nancy, 54500,
France
| | - Alain Delconte
- Université de Lorraine, CNRS, CRAN UMR 7039, Vandoeuvre-lès-Nancy, 54500,
France
| | - Christian Daul
- Université de Lorraine, CNRS, CRAN UMR 7039, Vandoeuvre-lès-Nancy, 54500,
France
| | - Valery Tuchin
- Saratov State University, 83, Astrakhanskaya Str., Saratov, 410012,
Russia
- Tomsk State University, 36 Lenin Avenue, Tomsk, 634050,
Russia
- Institute of Precision Mechanics and Control of the Russian Academy of Sciences, 24, Rabochaya Str., Saratov, 410028,
Russia
| | - Walter Blondel
- Université de Lorraine, CNRS, CRAN UMR 7039, Vandoeuvre-lès-Nancy, 54500,
France
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222
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Alfonso-Garcia A, Li C, Bec J, Yankelevich D, Marcu L, Sherlock B. Fiber-based platform for synchronous imaging of endogenous and exogenous fluorescence of biological tissue. OPTICS LETTERS 2019; 44:3350-3353. [PMID: 31259958 PMCID: PMC7539616 DOI: 10.1364/ol.44.003350] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 06/01/2019] [Indexed: 05/29/2023]
Abstract
Endogenous and exogenous fluorescence emission from biological samples encodes complementary information. Here we report, to the best of our knowledge, the first results from an optical imaging platform with interleaved excitation and detection of exogenous and endogenous fluorescence from tissue samples using a single flexible multimode fiber that delivers the excitation beam and collects the emitted light. A custom-built reflective optical chopper wheel with synchronized rotation temporally multiplexes an autofluorescence lifetime imaging apparatus with an intensity-based fluorescence module tailored to imaging green fluorescent protein. We demonstrate the functionality of such platform imaging dyes of varying fluorescence signatures and resolving cellularized areas on bio-engineered tissue constructs.
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Affiliation(s)
- Alba Alfonso-Garcia
- Department of Biomedical Engineering, University of California, Davis, 451 E. Health Sciences Dr., Davis, California 95616, USA
| | - Cai Li
- Department of Biomedical Engineering, University of California, Davis, 451 E. Health Sciences Dr., Davis, California 95616, USA
| | - Julien Bec
- Department of Biomedical Engineering, University of California, Davis, 451 E. Health Sciences Dr., Davis, California 95616, USA
| | - Diego Yankelevich
- Department of Biomedical Engineering, University of California, Davis, 451 E. Health Sciences Dr., Davis, California 95616, USA
- Department of Electrical and Computer Engineering, University of California, Davis, One Shields Avenue, Kemper Hall, Davis, California 95616, USA
| | - Laura Marcu
- Department of Biomedical Engineering, University of California, Davis, 451 E. Health Sciences Dr., Davis, California 95616, USA
| | - Ben Sherlock
- Department of Biomedical Engineering, University of California, Davis, 451 E. Health Sciences Dr., Davis, California 95616, USA
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223
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Lagarto JL, Dyer BT, Peters NS, French PMW, Dunsby C, Lyon AR. In vivo label-free optical monitoring of structural and metabolic remodeling of myocardium following infarction. BIOMEDICAL OPTICS EXPRESS 2019; 10:3506-3521. [PMID: 31360603 PMCID: PMC6640823 DOI: 10.1364/boe.10.003506] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/15/2019] [Accepted: 05/29/2019] [Indexed: 05/14/2023]
Abstract
Cardiac remodeling following myocardial infarction (MI) involves structural and functional alterations in the infarcted and remote viable myocardium that can ultimately lead to heart failure. The underlying mechanisms are not fully understood and, following our previous study of the autofluorescence lifetime and diffuse reflectance signatures of the myocardium in vivo at 16 weeks post MI in rats [Biomed. Opt. Express6(2), 324 (2015)], we here present data obtained at 1, 2 and 4 weeks post myocardial infarction that help follow the temporal progression of these changes. Our results demonstrate that both structural and metabolic changes in the heart can be monitored from the earliest time points following MI using label-free optical readouts, not only in the region of infarction but also in the remote non-infarcted myocardium. Changes in the autofluorescence intensity and lifetime parameters associated with collagen type I autofluorescence were indicative of progressive collagen deposition in tissue that was most pronounced at earlier time points and in the region of infarction. In addition to significant collagen deposition in infarcted and non-infarcted myocardium, we also report changes in the autofluorescence parameters associated with reduced nicotinamide adenine (phosphate) dinucleotide (NAD(P)H) and flavin adenine dinucleotide (FAD), which we associate with metabolic alterations throughout the heart. Parallel measurements of the diffuse reflectance spectra indicated an increased contribution of reduced cytochrome c. Our findings suggest that combining time-resolved spectrofluorometry and diffuse reflectance spectroscopy could provide a useful means to monitor cardiac function in vivo at the time of surgery.
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Affiliation(s)
- João L. Lagarto
- Photonics Group, Department of Physics, Imperial College London, Prince Consort Road, London, SW7 2AZ, United Kingdom
- Authors contributed equally to this work
| | - Benjamin T. Dyer
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, United Kingdom
- Authors contributed equally to this work
| | - Nicholas S. Peters
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, United Kingdom
- Centre for Cardiac Engineering, Imperial College London, Du Cane Road, London, W12 0NN, United Kingdom
| | - Paul M. W. French
- Photonics Group, Department of Physics, Imperial College London, Prince Consort Road, London, SW7 2AZ, United Kingdom
| | - Chris Dunsby
- Photonics Group, Department of Physics, Imperial College London, Prince Consort Road, London, SW7 2AZ, United Kingdom
- Centre for Pathology, Imperial College London Du Cane Road, London W12 0NN, United Kingdom
- Authors contributed equally to this work
| | - Alexander R. Lyon
- National Heart and Lung Institute, Imperial College London, Du Cane Road, London, W12 0NN, United Kingdom
- Authors contributed equally to this work
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Scodellaro R, Bouzin M, Mingozzi F, D'Alfonso L, Granucci F, Collini M, Chirico G, Sironi L. Whole-Section Tumor Micro-Architecture Analysis by a Two-Dimensional Phasor-Based Approach Applied to Polarization-Dependent Second Harmonic Imaging. Front Oncol 2019; 9:527. [PMID: 31275857 PMCID: PMC6593899 DOI: 10.3389/fonc.2019.00527] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 05/30/2019] [Indexed: 11/17/2022] Open
Abstract
Second Harmonic Generation (SHG) microscopy has gained much interest in the histopathology field since it allows label-free imaging of tissues simultaneously providing information on their morphology and on the collagen microarchitecture, thereby highlighting the onset of pathologies and diseases. A wide request of image analysis tools is growing, with the aim to increase the reliability of the analysis of the huge amount of acquired data and to assist pathologists in a user-independent way during their diagnosis. In this light, we exploit here a set of phasor-parameters that, coupled to a 2-dimensional phasor-based approach (μMAPPS, Microscopic Multiparametric Analysis by Phasor projection of Polarization-dependent SHG signal) and a clustering algorithm, allow to automatically recover different collagen microarchitectures in the tissues extracellular matrix. The collagen fibrils microscopic parameters (orientation and anisotropy) are analyzed at a mesoscopic level by quantifying their local spatial heterogeneity in histopathology sections (few mm in size) from two cancer xenografts in mice, in order to maximally discriminate different collagen organizations, allowing in this case to identify the tumor area with respect to the surrounding skin tissue. We show that the "fibril entropy" parameter, which describes the tissue order on a selected spatial scale, is the most effective in enlightening the tumor edges, opening the possibility of their automatic segmentation. Our method, therefore, combined with tissue morphology information, has the potential to become a support to standard histopathology in diseases diagnosis.
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Affiliation(s)
| | - Margaux Bouzin
- Physics Department, Università degli Studi di Milano-Bicocca, Milan, Italy
| | - Francesca Mingozzi
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy
| | - Laura D'Alfonso
- Physics Department, Università degli Studi di Milano-Bicocca, Milan, Italy
| | - Francesca Granucci
- Department of Biotechnology and Biosciences, Università degli Studi di Milano-Bicocca, Milan, Italy
| | - Maddalena Collini
- Physics Department, Università degli Studi di Milano-Bicocca, Milan, Italy
| | - Giuseppe Chirico
- Physics Department, Università degli Studi di Milano-Bicocca, Milan, Italy
| | - Laura Sironi
- Physics Department, Università degli Studi di Milano-Bicocca, Milan, Italy
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225
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Optical Signatures Derived From Deep UV to NIR Excitation Discriminates Healthy Samples From Low and High Grades Glioma. Sci Rep 2019; 9:8786. [PMID: 31217542 PMCID: PMC6584506 DOI: 10.1038/s41598-019-45181-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 05/29/2019] [Indexed: 12/28/2022] Open
Abstract
Among all the tumors of the central nervous system (CNS), glioma are the most deadly and the most malignant. Surgical resection is the standard therapeutic method to treat this type of brain cancer. But the diffusive character of these tumors create many problems for surgeons during the operation. In fact, these tumors migrate outside the tumor solid zone and invade the surrounding healthy tissues. These infiltrative tissues have the same visual appearance as healthy tissues, making it very difficult for surgeons to distinguish the healthy ones from the diffused ones. The surgeon, therefore, cannot properly remove the tumor margins increasing the recurrence risk of the tumor. To resolve this problem, our team has developed a multimodal two-photon fibered endomicroscope, compatible with the surgeon trocar, to better delimitate tumor boundaries by relying on the endogenous fluorescence of brain tissues. In this context, and in order to characterize the optical signature of glioma tumors, this study offers multimodal and multi-scaled optical measurements from healthy tissues to high grade glioma. We can interrogate tissue from deep ultra-violet to near infrared excitation by working with spectroscopy, fluorescence lifetime imaging, two-photon fluorescene imaging and Second Harmonic Generation (SHG) imaging. Optically derived ratios such as the Tryptophan/Collagen ratio, the optical redox ratio and the long lifetime intensity fraction, discriminated diseased tissue from its normal counterparts when fitted by Gaussian ellipsoids and choosing a threshold for each. Additionally two-photon fluorescence and SHG images were shown to display similar histological features as Hematoxylin-Eosin stained images.
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226
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Bhuckory S, Kays JC, Dennis AM. In Vivo Biosensing Using Resonance Energy Transfer. BIOSENSORS 2019; 9:E76. [PMID: 31163706 PMCID: PMC6628364 DOI: 10.3390/bios9020076] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 05/20/2019] [Accepted: 05/27/2019] [Indexed: 01/05/2023]
Abstract
Solution-phase and intracellular biosensing has substantially enhanced our understanding of molecular processes foundational to biology and pathology. Optical methods are favored because of the low cost of probes and instrumentation. While chromatographic methods are helpful, fluorescent biosensing further increases sensitivity and can be more effective in complex media. Resonance energy transfer (RET)-based sensors have been developed to use fluorescence, bioluminescence, or chemiluminescence (FRET, BRET, or CRET, respectively) as an energy donor, yielding changes in emission spectra, lifetime, or intensity in response to a molecular or environmental change. These methods hold great promise for expanding our understanding of molecular processes not just in solution and in vitro studies, but also in vivo, generating information about complex activities in a natural, organismal setting. In this review, we focus on dyes, fluorescent proteins, and nanoparticles used as energy transfer-based optical transducers in vivo in mice; there are examples of optical sensing using FRET, BRET, and in this mammalian model system. After a description of the energy transfer mechanisms and their contribution to in vivo imaging, we give a short perspective of RET-based in vivo sensors and the importance of imaging in the infrared for reduced tissue autofluorescence and improved sensitivity.
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Affiliation(s)
- Shashi Bhuckory
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA.
| | - Joshua C Kays
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA.
| | - Allison M Dennis
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA.
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA.
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227
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Borisova E, Genova T, Bratashov D, Lomova M, Terziev I, Vladimirov B, Avramov L, Semyachkina-Glushkovskaya O. Macroscopic and microscopic fluorescence spectroscopy of colorectal benign and malignant lesions - diagnostically important features. BIOMEDICAL OPTICS EXPRESS 2019; 10:3009-3017. [PMID: 31259070 PMCID: PMC6583348 DOI: 10.1364/boe.10.003009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/18/2019] [Accepted: 05/18/2019] [Indexed: 06/09/2023]
Abstract
Fluorescence spectroscopy is a sensitive, fast and non-invasive tool for a diagnostics of cancerous gastrointestinal lesions. It could be applied for in situ detection of tumours during primary endoscopic observations or as add-on measurement modality during microscopic observations of tissue histology slides for their initial or retrospective diagnosis. Therefore, we are looking for diagnostically important features of normal and cancerous tissue areas in a broad spectral range for gastrointestinal tissues ex vivo using two steady-state macroscopic fluorescent spectroscopic modalities and by confocal fluorescent microscopic detection. Results obtained from autofluorescence spectroscopy of benign and malignant lower part gastrointestinal tract (GIT) lesions from freshly excised tissues during surgical removal of the lesions in 18 patients (22 lesions), were compared with the spectral measurements obtained during confocal fluorescent microscopy observations of unstained tissue slides using 405 nm excitation. Excitation-emission matrices (EEMs) were used for ex vivo measurements with applied excitation in 280-440 nm spectral region and emission observed between 300 and 700 nm. Synchronous fluorescence spectroscopy (SFS) approach was also applied to improve the spectral resolution of the observed complex emission spectra. Specific fluorescent features observed, related to presence of structural proteins, co-enzymes and endogenous porphyrins in the tissues investigated, allow discriminating normal mucosa from benign polyps and malignant carcinoma lesions with diagnostic accuracy up to 94.4%.
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Affiliation(s)
- E. Borisova
- Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee Blvd., Sofia, 1784, Bulgaria
- Saratov State University, 83 Astrakhanskaya Str., Saratov, 410012, Russia
| | - T. Genova
- Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee Blvd., Sofia, 1784, Bulgaria
| | - D. Bratashov
- Saratov State University, 83 Astrakhanskaya Str., Saratov, 410012, Russia
| | - M. Lomova
- Saratov State University, 83 Astrakhanskaya Str., Saratov, 410012, Russia
| | - I. Terziev
- University Hospital “Tzaritza Yoanna – ISUL”, 8, “Byalo more” str., Sofia, 1527, Bulgaria
| | - B. Vladimirov
- University Hospital “Tzaritza Yoanna – ISUL”, 8, “Byalo more” str., Sofia, 1527, Bulgaria
| | - L. Avramov
- Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee Blvd., Sofia, 1784, Bulgaria
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228
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Zhai W, Yong D, El-Jawhari JJ, Cuthbert R, McGonagle D, Win Naing M, Jones E. Identification of senescent cells in multipotent mesenchymal stromal cell cultures: Current methods and future directions. Cytotherapy 2019; 21:803-819. [PMID: 31138507 DOI: 10.1016/j.jcyt.2019.05.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 03/30/2019] [Accepted: 05/06/2019] [Indexed: 12/11/2022]
Abstract
Regardless of their tissue of origin, multipotent mesenchymal stromal cells (MSCs) are commonly expanded in vitro for several population doublings to achieve a sufficient number of cells for therapy. Prolonged MSC expansion has been shown to result in phenotypical, morphological and gene expression changes in MSCs, which ultimately lead to the state of senescence. The presence of senescent cells in therapeutic MSC batches is undesirable because it reduces their viability, differentiation potential and trophic capabilities. Additionally, senescent cells acquire senescence-activated secretory phenotype, which may not only induce apoptosis in the neighboring host cells following MSC transplantation, but also trigger local inflammatory reactions. This review outlines the current and promising new methodologies for the identification of senescent cells in MSC cultures, with a particular emphasis on non-destructive and label-free methodologies. Technologies allowing identification of individual senescent cells, based on new surface markers, offer potential advantage for targeted senescent cell removal using new-generation senolytic agents, and subsequent production of therapeutic MSC batches fully devoid of senescent cells. Methods or a combination of methods that are non-destructive and label-free, for example, involving cell size and spectroscopic measurements, could be the best way forward because they do not modify the cells of interest, thus maximizing the final output of therapeutic-grade MSC cultures. The further incorporation of machine learning methods has also recently shown promise in facilitating, automating and enhancing the analysis of these measured data.
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Affiliation(s)
- Weichao Zhai
- Leeds Institute of Rheumatic and musculoskeletal Medicine, Leeds, UK; Singapore Institute of Manufacturing Technology, A*STAR, Innovis, Singapore
| | - Derrick Yong
- Singapore Institute of Manufacturing Technology, A*STAR, Innovis, Singapore
| | - Jehan Jomaa El-Jawhari
- Leeds Institute of Rheumatic and musculoskeletal Medicine, Leeds, UK; Department of Clinical Pathology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Richard Cuthbert
- Leeds Institute of Rheumatic and musculoskeletal Medicine, Leeds, UK
| | - Dennis McGonagle
- Leeds Institute of Rheumatic and musculoskeletal Medicine, Leeds, UK
| | - May Win Naing
- Singapore Institute of Manufacturing Technology, A*STAR, Innovis, Singapore
| | - Elena Jones
- Leeds Institute of Rheumatic and musculoskeletal Medicine, Leeds, UK.
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229
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Harris TA, Gattu S, Propheter DC, Kuang Z, Bel S, Ruhn KA, Chara AL, Edwards M, Zhang C, Jo JH, Raj P, Zouboulis CC, Kong HH, Segre JA, Hooper LV. Resistin-like Molecule α Provides Vitamin-A-Dependent Antimicrobial Protection in the Skin. Cell Host Microbe 2019; 25:777-788.e8. [PMID: 31101494 DOI: 10.1016/j.chom.2019.04.004] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 03/17/2019] [Accepted: 04/15/2019] [Indexed: 12/27/2022]
Abstract
Vitamin A deficiency increases susceptibility to skin infection. However, the mechanisms by which vitamin A regulates skin immunity remain unclear. Here, we show that resistin-like molecule α (RELMα), a small secreted cysteine-rich protein, is expressed by epidermal keratinocytes and sebocytes and serves as an antimicrobial protein that is required for vitamin-A-dependent resistance to skin infection. RELMα was induced by microbiota colonization of the murine skin, was bactericidal in vitro, and was protected against bacterial infection of the skin in vivo. RELMα expression required dietary vitamin A and was induced by the therapeutic vitamin A analog isotretinoin, which protected against skin infection in a RELMα-dependent manner. The RELM family member Resistin was expressed in human skin, was induced by vitamin A analogs, and killed skin bacteria, indicating a conserved function for RELM proteins in skin innate immunity. Our findings provide insight into how vitamin A promotes resistance to skin infection.
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Affiliation(s)
- Tamia A Harris
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
| | - Sureka Gattu
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Daniel C Propheter
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Zheng Kuang
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Shai Bel
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Kelly A Ruhn
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Andrew L Chara
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Marshall Edwards
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Chenlu Zhang
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jay-Hyun Jo
- Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, Bethesda, MD 20892, USA
| | - Prithvi Raj
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Christos C Zouboulis
- Department of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center, Brandenburg Medical School Theodore Fontane, 06847 Dessau, Germany
| | - Heidi H Kong
- Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, Bethesda, MD 20892, USA
| | - Julia A Segre
- Translational and Functional Genomics Branch, National Human Genome Research Institute, NIH, Bethesda, MD 20892, USA
| | - Lora V Hooper
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; The Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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230
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Li Y, Xie X, Yang X, Guo L, Liu Z, Zhao X, Luo Y, Jia W, Huang F, Zhu S, Chen Z, Chen X, Wei Z, Zhang W. Diagnosis of early gastric cancer based on fluorescence hyperspectral imaging technology combined with partial-least-square discriminant analysis and support vector machine. JOURNAL OF BIOPHOTONICS 2019; 12:e201800324. [PMID: 30585424 DOI: 10.1002/jbio.201800324] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 11/18/2018] [Accepted: 12/23/2018] [Indexed: 06/09/2023]
Abstract
This study investigated the feasibility of using fluorescence hyperspectral imaging technology to diagnose of early-stage gastric cancer. Fluorescence spectral images of 76 patients who were pathologically diagnosed as non-atrophic gastritis, premalignant lesions and gastric cancer were collected. Fluorescence spectra at 100-pixel points were randomly extracted after binarization. Diagnostic models of non-atrophic gastritis, premalignant lesions and gastric cancer were constructed through partial-least-square discriminant analysis (PLS-DA) and support vector machine (SVM) algorithms. The prediction effects of PLS-DA and SVM models were compared. Results showed that the average spectra of normal, precancerous and gastric cancer tissues significantly differed at 496, 546, 640 and 670 nm, and regular changes in fluorescence intensity at 546 nm were in the following order: normal > precancerous lesions > gastric cancer. Additionally, the effect of the diagnostic model established by SVM is significantly better than PLS-DA which accuracy, specificity and sensitivity are above 94%. Experimental results revealed that the fast diagnostic model of early gastric cancer by combining fluorescence hyperspectral imaging technology and improved SVM was effective and feasible, thereby providing an accurate and rapid method for diagnosing early-stage gastric cancer.
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Affiliation(s)
- Yuanpeng Li
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Jinan University, Guangzhou, China
- Department of Optoelectronic Engineering, Jinan University, Guangzhou, China
| | - Xiaojuan Xie
- Department of Gastroenterology and Endocrinology, The 74th Group Army Hospital of the PLA, Guangzhou, China
| | - Xinhao Yang
- Department of Optoelectronic Engineering, Jinan University, Guangzhou, China
| | - Liu Guo
- Department of Optoelectronic Engineering, Jinan University, Guangzhou, China
| | - Zhao Liu
- Department of Gastroenterology and Endocrinology, The 74th Group Army Hospital of the PLA, Guangzhou, China
| | - Xiaoping Zhao
- Department of Gastroenterology and Endocrinology, The 74th Group Army Hospital of the PLA, Guangzhou, China
| | - Ying Luo
- Department of Gastroenterology and Endocrinology, The 74th Group Army Hospital of the PLA, Guangzhou, China
| | - Wei Jia
- Department of Gastroenterology and Endocrinology, The 74th Group Army Hospital of the PLA, Guangzhou, China
| | - Furong Huang
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Jinan University, Guangzhou, China
- Department of Optoelectronic Engineering, Jinan University, Guangzhou, China
- Research Institute of Jinan University in Dongguan, Dongguan, China
| | - Siqi Zhu
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Jinan University, Guangzhou, China
- Department of Optoelectronic Engineering, Jinan University, Guangzhou, China
| | - Zhenqiang Chen
- Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Jinan University, Guangzhou, China
- Department of Optoelectronic Engineering, Jinan University, Guangzhou, China
| | - Xingdan Chen
- Department of Optoelectronic Engineering, Jinan University, Guangzhou, China
| | - Zhong Wei
- Department of Gastroenterology, Zhujiang Hospital of the Southern Medical University, Guangzhou, China
| | - Weimin Zhang
- Department of Gastroenterology and Endocrinology, The 74th Group Army Hospital of the PLA, Guangzhou, China
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231
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Fauch L, Palander A, Dekker H, Schulten EA, Koistinen A, Kullaa A, Keinänen M. Narrowband-autofluorescence imaging for bone analysis. BIOMEDICAL OPTICS EXPRESS 2019; 10:2367-2382. [PMID: 31149377 PMCID: PMC6524578 DOI: 10.1364/boe.10.002367] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/28/2019] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
We present a new autofluorescence-imaging method for bone analysis. This method, based on the autofluorescence of bone, provides color images in microscopic scale. The color images are created from three monochrome images acquired with optimal excitation- and emission-wavelengths combinations. The choice of these combinations were determined from the study of two-dimensional distributions of bone-features-bispectral autofluorescence in the visible- and ultraviolet-spectral range. We demonstrate that main-bone features visualized with MG-staining method can also be visualized in the autofluorescence-color image. Furthermore, the autofluorescence-color image presents features hardly distinguished in a histological-bone section.
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Affiliation(s)
- Laure Fauch
- SIB Labs, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
- Co-first authors with equal contribution
- Co-first authors with equal contribution
| | - Anni Palander
- Institute of Dentistry, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
- Co-first authors with equal contribution
| | - Hannah Dekker
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Vrije Universiteit VU University Medical Center/Academic Centre for Dentistry Amsterdam (ACTA), P.O. Box 7057, Amsterdam, The Netherlands
| | - Engelbert Ajm Schulten
- Department of Oral and Maxillofacial Surgery/Oral Pathology, Vrije Universiteit VU University Medical Center/Academic Centre for Dentistry Amsterdam (ACTA), P.O. Box 7057, Amsterdam, The Netherlands
| | - Arto Koistinen
- SIB Labs, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
| | - Arja Kullaa
- SIB Labs, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
- Institute of Dentistry, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
- Research Group of Oral Health Sciences, Faculty of Medicine, P.O. Box 8000, 90014 Oulu, Finland
| | - Markku Keinänen
- Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 111, 80100 Joensuu, Finland
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232
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Sherlock BE, Li C, Zhou X, Alfonso-Garcia A, Bec J, Yankelevich D, Marcu L. Multiscale, multispectral fluorescence lifetime imaging using a double-clad fiber. OPTICS LETTERS 2019; 44:2302-2305. [PMID: 31042209 PMCID: PMC7539568 DOI: 10.1364/ol.44.002302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Fiber-based imaging of tissue autofluorescence using ultraviolet (UV) excitation is a highly flexible tool used to probe structure and composition. In this Letter, we report, to the best of our knowledge, the first results from a single-fiber imaging system employing a custom double-clad fiber to acquire multispectral fluorescence lifetime images at two distinct spatial resolutions. We characterize the lateral point spread function and fluorescent background of the system and show how enhanced resolution can identify features such as trabeculae in ex vivo murine bone samples.
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Affiliation(s)
- Benjamin E. Sherlock
- Genome and Biomedical Sciences Facility, University of California, Davis, 451 Health Sciences Drive, Davis, California 95616, USA
| | - Cai Li
- Genome and Biomedical Sciences Facility, University of California, Davis, 451 Health Sciences Drive, Davis, California 95616, USA
| | - Xiangnan Zhou
- Genome and Biomedical Sciences Facility, University of California, Davis, 451 Health Sciences Drive, Davis, California 95616, USA
| | - Alba Alfonso-Garcia
- Genome and Biomedical Sciences Facility, University of California, Davis, 451 Health Sciences Drive, Davis, California 95616, USA
| | - Julien Bec
- Genome and Biomedical Sciences Facility, University of California, Davis, 451 Health Sciences Drive, Davis, California 95616, USA
| | - Diego Yankelevich
- Genome and Biomedical Sciences Facility, University of California, Davis, 451 Health Sciences Drive, Davis, California 95616, USA
- Department of Electrical and Computer Engineering, University of California, Davis, One Shields Avenue, Davis, California 95616, USA
| | - Laura Marcu
- Genome and Biomedical Sciences Facility, University of California, Davis, 451 Health Sciences Drive, Davis, California 95616, USA
- Corresponding author:
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233
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Alston L, Mahieu-Williame L, Hebert M, Kantapareddy P, Meyronet D, Rousseau D, Guyotat J, Montcel B. Spectral complexity of 5-ALA induced PpIX fluorescence in guided surgery: a clinical study towards the discrimination of healthy tissue and margin boundaries in high and low grade gliomas. BIOMEDICAL OPTICS EXPRESS 2019; 10:2478-2492. [PMID: 31149380 PMCID: PMC6524587 DOI: 10.1364/boe.10.002478] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/09/2019] [Accepted: 03/21/2019] [Indexed: 05/06/2023]
Abstract
Gliomas are diffuse and hard to cure brain tumors. A major reason for their aggressive behavior is their property to infiltrate the brain. The gross appearance of the infiltrative component is comparable to normal brain, constituting an obstacle to extended surgical resection. 5-ALA induced PpIX fluorescence measurements enable gains in sensitivity to detect infiltrated cells, but still lack sensitivity to get accurate discrimination between the tumor margin and healthy tissue. In this fluorescence spectroscopic study, we assume that two states of PpIX contribute to total fluorescence to get better discrimination of healthy tissues against tumor margins. We reveal that fluorescence in low-density margins of high-grade gliomas or in low-grade gliomas is mainly influenced by the second state of PpIX centered at 620 nm. We thus conclude that consideration of the contributions of both states to total fluorescence can help to improve fluorescence-guided resection of gliomas by discriminating healthy tissues from tumor margins.
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Affiliation(s)
- L. Alston
- Univ Lyon, INSA‐Lyon, Université Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR5220, U1206, F-69616, Lyon, France
| | - L. Mahieu-Williame
- Univ Lyon, INSA‐Lyon, Université Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR5220, U1206, F-69616, Lyon, France
| | - M. Hebert
- Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, Lab. Hubert Curien UMR5516, F-42023, St Etienne, France
| | - P. Kantapareddy
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service d’anatomopathologie, 59 Bvd Pinel, 69394, Lyon, Cedex, France
| | - D. Meyronet
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service d’anatomopathologie, 59 Bvd Pinel, 69394, Lyon, Cedex, France
- Department of Cancer Cell Plasticity, Cancer Research Centre of Lyon, INSERM U1052, CNRS UMR5286, Lyon, France, Université Claude Bernard Lyon 1, Lyon, France
| | - D. Rousseau
- Univ Lyon, INSA‐Lyon, Université Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR5220, U1206, F-69616, Lyon, France
| | - J. Guyotat
- Hospices Civils de Lyon, Groupe Hospitalier Est, Service d’anatomopathologie, 59 Bvd Pinel, 69394, Lyon, Cedex, France
| | - B. Montcel
- Univ Lyon, INSA‐Lyon, Université Lyon 1, UJM-Saint Etienne, CNRS, Inserm, CREATIS UMR5220, U1206, F-69616, Lyon, France
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234
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Yoon J, Joseph J, Waterhouse DJ, Luthman AS, Gordon GSD, di Pietro M, Januszewicz W, Fitzgerald RC, Bohndiek SE. A clinically translatable hyperspectral endoscopy (HySE) system for imaging the gastrointestinal tract. Nat Commun 2019; 10:1902. [PMID: 31015458 PMCID: PMC6478902 DOI: 10.1038/s41467-019-09484-4] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/12/2019] [Indexed: 02/06/2023] Open
Abstract
Hyperspectral imaging (HSI) enables visualisation of morphological and biochemical information, which could improve disease diagnostic accuracy. Unfortunately, the wide range of image distortions that arise during flexible endoscopy in the clinic have made integration of HSI challenging. To address this challenge, we demonstrate a hyperspectral endoscope (HySE) that simultaneously records intrinsically co-registered hyperspectral and standard-of-care white light images, which allows image distortions to be compensated computationally and an accurate hyperspectral data cube to be reconstructed as the endoscope moves in the lumen. Evaluation of HySE performance shows excellent spatial, spectral and temporal resolution and high colour fidelity. Application of HySE enables: quantification of blood oxygenation levels in tissue mimicking phantoms; differentiation of spectral profiles from normal and pathological ex vivo human tissues; and recording of hyperspectral data under freehand motion within an intact ex vivo pig oesophagus model. HySE therefore shows potential for enabling HSI in clinical endoscopy.
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Affiliation(s)
- Jonghee Yoon
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - James Joseph
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - Dale J Waterhouse
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - A Siri Luthman
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK
| | - George S D Gordon
- Department of Engineering, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0FA, UK
| | - Massimiliano di Pietro
- MRC Cancer Unit, Hutchison/MRC Research Centre, University of Cambridge, Cambridge, CB2 0XZ, UK
| | - Wladyslaw Januszewicz
- MRC Cancer Unit, Hutchison/MRC Research Centre, University of Cambridge, Cambridge, CB2 0XZ, UK
| | - Rebecca C Fitzgerald
- MRC Cancer Unit, Hutchison/MRC Research Centre, University of Cambridge, Cambridge, CB2 0XZ, UK
| | - Sarah E Bohndiek
- Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB3 0HE, UK.
- Cancer Research UK Cambridge Institute, University of Cambridge, Li Ka Shing Centre, Cambridge, CB2 0RE, UK.
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235
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Harvestine JN, Sheaff CS, Li C, Haudenschild AK, Gionet-Gonzales MA, Hu JC, Athanasiou KA, Marcu L, Leach JK. Multimodal Label-Free Imaging for Detecting Maturation of Engineered Osteogenic Grafts. ACS Biomater Sci Eng 2019; 5:1956-1966. [PMID: 33405522 PMCID: PMC8594456 DOI: 10.1021/acsbiomaterials.9b00007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
There is a critical need to develop noninvasive, nondestructive methods for assessing the quality of engineered constructs prior to implantation. Currently, the composition and maturity of engineered tissues are assessed using destructive, costly, and time-consuming biochemical and mechanical analyses. The goal of this study was to use noninvasive, multimodal imaging to monitor osteogenic differentiation and matrix deposition by human mesenchymal stem/stromal cells (MSCs) during in vitro culture. MSCs were encapsulated in alginate hydrogels and cultured in osteogenic conditions for 4 weeks. Samples were evaluated using fluorescence lifetime imaging (FLIm) and ultrasound backscatter microscopy (UBM) prior to traditional biochemical and mechanical testing. Using linear regression analysis, we identified strong correlations between imaging parameters (e.g., fluorescence lifetime and acoustic attenuation coefficient) and destructive mechanical and biochemical tests to assess the maturation of osteogenically induced constructs. These data demonstrate the promise of nondestructive label-free imaging techniques to noninvasively ascertain the progression and maturity of tissue engineered bone grafts.
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Affiliation(s)
- Jenna N. Harvestine
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Clay S. Sheaff
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Cai Li
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Anne K. Haudenschild
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Marissa A. Gionet-Gonzales
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Jerry C. Hu
- Department of Biomedical Engineering, University of California, Irvine, Irvine California 92697, United States
| | - Kyriacos A. Athanasiou
- Department of Biomedical Engineering, University of California, Irvine, Irvine California 92697, United States
| | - Laura Marcu
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - J. Kent Leach
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
- Department of Orthopaedic Surgery, School of Medicine, UC Davis Health, Sacramento, California 95817, United States
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236
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Petersen E, Mills E, Miller SI. Cyclic-di-GMP regulation promotes survival of a slow-replicating subpopulation of intracellular Salmonella Typhimurium. Proc Natl Acad Sci U S A 2019; 116:6335-6340. [PMID: 30862737 PMCID: PMC6442585 DOI: 10.1073/pnas.1901051116] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Salmonella Typhimurium can invade and survive within macrophages where the bacterium encounters a range of host environmental conditions. Like many bacteria, S. Typhimurium rapidly responds to changing environments by the use of second messengers such as cyclic di-GMP (c-di-GMP). Here, we generate a fluorescent biosensor to measure c-di-GMP concentrations in thousands of individual bacteria during macrophage infection and to define the sensor enzymes important to c-di-GMP regulation. Three sensor phosphodiesterases were identified as critical to maintaining low c-di-GMP concentrations generated after initial phagocytosis by macrophages. Maintenance of low c-di-GMP concentrations by these phosphodiesterases was required to promote survival within macrophages and virulence for mice. Attenuation of S Typhimurium virulence was due to overproduction of c-di-GMP-regulated cellulose, as deletion of the cellulose synthase machinery restored virulence to a strain lacking enzymatic activity of the three phosphodiesterases. We further identified that the cellulose-mediated reduction in survival was constrained to a slow-replicating persister population of S. Typhimurium induced within the macrophage intracellular environment. As utilization of glucose has been shown to be required for S. Typhimurium macrophage survival, one possible hypothesis is that this persister population requires the glucose redirected to the synthesis of cellulose to maintain a slow-replicating, metabolically active state.
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Affiliation(s)
- Erik Petersen
- Department of Microbiology, University of Washington, Seattle, WA 98195
| | - Erez Mills
- Department of Microbiology, University of Washington, Seattle, WA 98195
| | - Samuel I Miller
- Department of Microbiology, University of Washington, Seattle, WA 98195;
- Department of Immunology, University of Washington, Seattle, WA 98195
- Department of Genome Sciences, University of Washington, Seattle, WA 98195
- Department of Medicine, University of Washington, Seattle, WA 98195
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237
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Moriichi K, Fujiya M, Kobayashi Y, Murakami Y, Iwama T, Kunogi T, Sasaki T, Ijiri M, Takahashi K, Tanaka K, Sakatani A, Ando K, Nomura Y, Ueno N, Kashima S, Ikuta K, Tanabe H, Mizukami Y, Saitoh Y, Okumura T. Autofluorescence Imaging Reflects the Nuclear Enlargement of Tumor Cells as well as the Cell Proliferation Ability and Aberrant Status of the p53, Ki-67, and p16 Genes in Colon Neoplasms. Molecules 2019; 24:molecules24061106. [PMID: 30897785 PMCID: PMC6471796 DOI: 10.3390/molecules24061106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/14/2019] [Accepted: 03/15/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Autofluorescence imaging (AFI) is useful for diagnosing colon neoplasms, but what affects the AFI intensity remains unclear. This study investigated the association between AFI and the histological characteristics, aberrant methylation status, and aberrant expression in colon neoplasms. METHODS Fifty-three patients with colorectal neoplasms who underwent AFI were enrolled. The AFI intensity (F index) was compared with the pathological findings and gene alterations. The F index was calculated using an image analysis software program. The pathological findings were assessed by the tumor crypt density, cell densities, and N/C ratio. The aberrant methylation of p16, E-cadherin, Apc, Runx3, and hMLH1 genes was determined by a methylation-specific polymerase chain reaction. The aberrant expression of p53 and Ki-67 was evaluated by immunohistochemical staining. RESULTS An increased N/C ratio, the aberrant expression of p53, Ki-67, and the altered methylation of p16 went together with a lower F index. The other pathological findings and the methylation status showed no association with the F index. CONCLUSIONS AFI reflects the nuclear enlargement of tumor cells, the cell proliferation ability, and the altered status of cell proliferation-related genes, indicating that AFI is a useful and practical method for predicting the dysplastic grade of tumor cells and cell proliferation.
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Affiliation(s)
- Kentaro Moriichi
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Mikihiro Fujiya
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Yu Kobayashi
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Yuki Murakami
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Takuya Iwama
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Takehito Kunogi
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Takahiro Sasaki
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Masami Ijiri
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Keitaro Takahashi
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Kazuyuki Tanaka
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Aki Sakatani
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Katsuyoshi Ando
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Yoshiki Nomura
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Nobuhiro Ueno
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Shin Kashima
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Katsuya Ikuta
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Hiroki Tanabe
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Yusuke Mizukami
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
| | - Yusuke Saitoh
- Digestive Disease Center, Asahikawa City Hospital, Asahikawa 070-8610, Japan.
| | - Toshikatsu Okumura
- Division of Gastroenterology and Hematology/Oncology, Department of Medicine, Asahikawa Medical University, Asahikawa 078-8510, Japan.
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238
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Mehidine H, Sibai M, Poulon F, Pallud J, Varlet P, Zanello M, Devaux B, Abi Haidar D. Multimodal imaging to explore endogenous fluorescence of fresh and fixed human healthy and tumor brain tissues. JOURNAL OF BIOPHOTONICS 2019; 12:e201800178. [PMID: 30203459 DOI: 10.1002/jbio.201800178] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 09/07/2018] [Indexed: 06/08/2023]
Abstract
To complement a project toward label-free optical biopsy and enhanced resection which the overall goal is to develop a multimodal nonlinear endomicroscope, this multimodal approach aims to enhance the accuracy in classifying brain tissue into solid tumor, infiltration and normal tissue intraoperatively. Multiple optical measurements based on one- and two-photon spectral and lifetime autofluorescence, including second harmonic generation imaging, were acquired. As a prerequisite, studying the effect of the time of measurement postexcision on tissue's spectral/lifetime fluorescence properties was warranted, so spectral and lifetime fluorescences of fresh brain tissues were measured using a point-based linear endoscope. Additionally, a comparative study on tissue's optical properties obtained by multimodal nonlinear optical imaging microscope from fresh and fixed tissue was necessary to test whether clinical validation of the nonlinear endomicroscope is feasible by extracting optical signatures from fixed tissue rather than from freshly excised samples. The former is generally chosen for convenience. Results of this study suggest that an hour is necessary postexcision to have consistent fluorescence intensities\lifetimes. The fresh (a,b,c) vs fixed (d,e,f) tissue study indicates that while all optical signals differ after fixation. The characteristic features extracted from one- and two-photon excitation still discriminate normal brain (a,d) cortical tissue, glioblastoma (GBM) (b,e) and metastases (c,f).
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Affiliation(s)
- Hussein Mehidine
- IMNC Laboratory, UMR 8165-CNRS/ IN2P3, Paris-Saclay University, Orsay, France
- Paris Diderot University, Sorbonne Paris Cité, F-75013, Paris, France
| | - Mira Sibai
- IMNC Laboratory, UMR 8165-CNRS/ IN2P3, Paris-Saclay University, Orsay, France
| | - Fanny Poulon
- IMNC Laboratory, UMR 8165-CNRS/ IN2P3, Paris-Saclay University, Orsay, France
| | - Johan Pallud
- Neurosurgery Department, Sainte-Anne Hospital, Paris, France
- IMA BRAIN, INSERMU894, Centre de Psychiatrie et de Neurosciences, Paris, France
- Paris Descartes University, Paris, France
| | - Pascale Varlet
- IMA BRAIN, INSERMU894, Centre de Psychiatrie et de Neurosciences, Paris, France
- Paris Descartes University, Paris, France
- Neuropathology Department, Sainte-Anne Hospital, Paris, France
| | - Marc Zanello
- Neurosurgery Department, Sainte-Anne Hospital, Paris, France
- Paris Descartes University, Paris, France
| | - Bertrand Devaux
- Neurosurgery Department, Sainte-Anne Hospital, Paris, France
- Paris Descartes University, Paris, France
| | - Darine Abi Haidar
- IMNC Laboratory, UMR 8165-CNRS/ IN2P3, Paris-Saclay University, Orsay, France
- Paris Diderot University, Sorbonne Paris Cité, F-75013, Paris, France
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239
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Bertolo A, Baur M, Guerrero J, Pötzel T, Stoyanov J. Autofluorescence is a Reliable in vitro Marker of Cellular Senescence in Human Mesenchymal Stromal Cells. Sci Rep 2019; 9:2074. [PMID: 30765770 PMCID: PMC6376004 DOI: 10.1038/s41598-019-38546-2] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 12/20/2018] [Indexed: 12/23/2022] Open
Abstract
Mesenchymal stromal cells (MSC) are used in cell therapies, however cellular senescence increases heterogeneity of cell populations and leads to uncertainty in therapies’ outcomes. The determination of cellular senescence is time consuming and logistically intensive. Here, we propose the use of endogenous autofluorescence as real-time quantification of cellular senescence in human MSC, based on label-free flow cytometry analysis. We correlated cell autofluorescence to senescence using senescence-associated beta-galactosidase assay (SA-β-Gal) with chromogenic (X-GAL) and fluorescent (C12FDG) substrates, gene expression of senescence markers (such as p16INK4A, p18INK4C, CCND2 and CDCA7) and telomere length. Autofluorescence was further correlated to MSC differentiation assays (adipogenesis, chondrogenesis and osteogenesis), MSC stemness markers (CD90/CD106) and cytokine secretion (IL-6 and MCP-1). Increased cell autofluorescence significantly correlated with increased SA-β-Gal signal (both X-GAL and C12FDG substrates), cell volume and cell granularity, IL-6/MCP-1 secretion and with increased p16INK4A and CCND2 gene expression. Increased cell autofluorescence was negatively associated with the expression of the CD90/CD106 markers, osteogenic and chondrogenic differentiation potentials and p18INK4C and CDCA7 gene expression. Cell autofluorescence correlated neither with telomere length nor with adipogenic differentiation potential. We conclude that autofluorescence can be used as fast and non-invasive senescence assay for comparing MSC populations under controlled culture conditions.
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Affiliation(s)
| | - Martin Baur
- Cantonal Hospital of Lucerne, Lucerne, 6000, Switzerland.,Swiss Paraplegic Centre, Nottwil, 6207, Switzerland
| | - Julien Guerrero
- Department of Biomedicine and Tissue Engineering, University of Basel Hospital, Basel, 4031, Switzerland
| | | | - Jivko Stoyanov
- Swiss Paraplegic Research, Nottwil, 6207, Switzerland. .,Institute for Surgical Technology and Biomechanics, University of Bern, Bern, 3014, Switzerland.
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240
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Qin W, Luo M, Wang K, Yang M, Sheng H, He G. A combined treatment with erythrocyte lysis solution and Sudan Black B reduces tissue autofluorescence in double-labeling immunofluorescence. Microscopy (Oxf) 2019; 67:345-355. [PMID: 30307555 DOI: 10.1093/jmicro/dfy038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 09/07/2018] [Indexed: 11/14/2022] Open
Abstract
The autofluorescence of animal tissues complicates the results obtained using fluorescence microscopy. Many techniques have been used to reduce autofluorescence; however, all these techniques have the disadvantage of reducing the intensity of immunofluorescence staining. We observed the features of autofluorescence in formalin-fixed paraffin-embedded (FFPE) vascularized liver and kidney sections and assessed the effects of an intravascular treatment with erythrocyte lysis solution (ELS) before a routine perfusion with normal saline (NS) and Sudan Black B (SBB) treatment after antigen retrieval on reducing autofluorescence reduction and the visualization of antigens to establish an optimal method for reducing autofluorescence. Erythrocytes exhibited bright autofluorescence in FFPE liver and kidney sections, which altered the results of actin and destrin immunofluorescence staining. The SBB treatment significantly reduced background autofluorescence and exerted a moderate effect on reducing the autofluorescence of erythrocytes, and the intravascular ELS treatment eliminated erythrocyte autofluorescence in FFPE liver and kidney sections. A combined treatment with ELS and SBB further reduced autofluorescence but did not decrease actin and destrin immunofluorescence staining in double-labeled FFPE liver and kidney sections. In conclusion, the application of an intravascular ELS treatment before the NS perfusion combined with an SBB treatment after antigen retrieval is a simple and efficient strategy for reducing autofluorescence in FFPE vascularized tissues and can be broadly used in fluorescence microscopy analyses.
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Affiliation(s)
- Wanxiang Qin
- Department of Anatomy, Basic Medical College, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing, PR China.,Department of Pain Care, Southwest hospital, Third Military Medical University, 30 Gaotanyan Road, Chongqing, China
| | - Min Luo
- Department of Anatomy, Basic Medical College, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing, PR China
| | - Kejian Wang
- Department of Anatomy, Basic Medical College, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing, PR China
| | - Mei Yang
- Department of Anatomy, Basic Medical College, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing, PR China
| | - Huajun Sheng
- Department of Anatomy, Basic Medical College, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing, PR China
| | - Guiqiong He
- Department of Anatomy, Basic Medical College, Chongqing Medical University, No. 1 Yixueyuan Road, Yuzhong District, Chongqing, PR China
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241
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Deal J, McFarland SJ, Robinson A, Alford A, Weber DS, Rich TC, Leavesley SJ. Hyperspectral imaging fluorescence excitation scanning spectral characteristics of remodeled mouse arteries. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2019; 10890:108902M. [PMID: 34045786 PMCID: PMC8151224 DOI: 10.1117/12.2510770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Coronary artery disease (CAD), or atherosclerosis, is responsible for nearly a third of all American deaths annually. Detection of plaques and differentiation of plaque stage remains a complicating factor for treatment. Classification of plaque before significant blockage or rupture could inform clinical decisions and prevent mortality. Current detection methods are either nonspecific, slow, or require the use of potentially harmful contrast agents. Recent advances in hyperspectral imaging could be used to detect changes in the autofluorescence of arteries associated with vessel remodeling and subsequent plaque formation and could detect and classify existing lesions. Here, we present data comparing spectral image characteristics of a mouse model designed to undergo vessel remodeling. C57Bl/6 mice underwent ligation of three of four caudal branches of the left common carotid artery (left external carotid, internal carotid, and occipital artery) with the superior thyroid artery left intact under IACUC approved protocol. Vessels were harvested at a variety of timepoints to compare degrees of remodeling, including 4 weeks and 5 months post-surgery. Immediately following harvest, vessels were prepared by longitudinal opening to expose the luminal surface to a 20X objective. A custom inverted microscope (TE-2000, Nikon Instruments) with a Xe arc lamp and thin film tunable filter arrary (Versachrome, Semrock, Inc.) were used to achieve spectral imaging. Excitation scans utilized wavelengths between 340 nm and 550 nm in 5 nm increments. Hyperspectral data were generated and analyzed with custom Matlab scripts and visualized in ENVI. Preliminary data suggest consistent spectral features associated with control and remodeled vessels.
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Affiliation(s)
- Joshua Deal
- Department of Chemical & Biomolecular Engineering, University of South Alabama
- Center for Lung Biology, University of South Alabama
- Department of Pharmacology, University of South Alabama
| | | | | | - Anna Alford
- Department of Physics and Mathematics, Furman University
| | - David S Weber
- Department of Physiology & Cell Biology, University of South Alabama
| | - Thomas C Rich
- Center for Lung Biology, University of South Alabama
- Department of Pharmacology, University of South Alabama
| | - Silas J Leavesley
- Department of Chemical & Biomolecular Engineering, University of South Alabama
- Center for Lung Biology, University of South Alabama
- Department of Pharmacology, University of South Alabama
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242
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Zhang J, Konsmo A, Sandberg A, Wu X, Nyström S, Obermüller U, Wegenast-Braun BM, Konradsson P, Lindgren M, Hammarström P. Phenolic Bis-styrylbenzo[c]-1,2,5-thiadiazoles as Probes for Fluorescence Microscopy Mapping of Aβ Plaque Heterogeneity. J Med Chem 2019; 62:2038-2048. [DOI: 10.1021/acs.jmedchem.8b01681] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jun Zhang
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Audun Konsmo
- Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Alexander Sandberg
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Xiongyu Wu
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Sofie Nyström
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Ulrike Obermüller
- Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, 72076 Tübingen, Germany
- DZNE−German Center for Neurodegenerative Diseases, 72076 Tübingen, Germany
| | - Bettina M. Wegenast-Braun
- Department of Cellular Neurology, Hertie Institute for Clinical Brain Research, University of Tübingen, 72076 Tübingen, Germany
- DZNE−German Center for Neurodegenerative Diseases, 72076 Tübingen, Germany
| | - Peter Konradsson
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
| | - Mikael Lindgren
- Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Per Hammarström
- Division of Chemistry, Department of Physics Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
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243
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Markwalter C, Kantor AG, Moore CP, Richardson KA, Wright DW. Inorganic Complexes and Metal-Based Nanomaterials for Infectious Disease Diagnostics. Chem Rev 2019; 119:1456-1518. [PMID: 30511833 PMCID: PMC6348445 DOI: 10.1021/acs.chemrev.8b00136] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Indexed: 12/12/2022]
Abstract
Infectious diseases claim millions of lives each year. Robust and accurate diagnostics are essential tools for identifying those who are at risk and in need of treatment in low-resource settings. Inorganic complexes and metal-based nanomaterials continue to drive the development of diagnostic platforms and strategies that enable infectious disease detection in low-resource settings. In this review, we highlight works from the past 20 years in which inorganic chemistry and nanotechnology were implemented in each of the core components that make up a diagnostic test. First, we present how inorganic biomarkers and their properties are leveraged for infectious disease detection. In the following section, we detail metal-based technologies that have been employed for sample preparation and biomarker isolation from sample matrices. We then describe how inorganic- and nanomaterial-based probes have been utilized in point-of-care diagnostics for signal generation. The following section discusses instrumentation for signal readout in resource-limited settings. Next, we highlight the detection of nucleic acids at the point of care as an emerging application of inorganic chemistry. Lastly, we consider the challenges that remain for translation of the aforementioned diagnostic platforms to low-resource settings.
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Affiliation(s)
| | | | | | | | - David W. Wright
- Department of Chemistry, Vanderbilt
University, Nashville, Tennessee 37235, United States
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244
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In-vivo correlations between skin metabolic oscillations and vasomotion in wild-type mice and in a model of oxidative stress. Sci Rep 2019; 9:186. [PMID: 30655574 PMCID: PMC6336806 DOI: 10.1038/s41598-018-36970-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 11/27/2018] [Indexed: 12/17/2022] Open
Abstract
Arterioles in the cutaneous microcirculation frequently display an oscillatory phenomenon defined vasomotion, consistent with periodic diameter variations in the micro-vessels associated with particular physiological or abnormal conditions. The cellular mechanisms underlying vasomotion and its physiological role have not been completely elucidated. Various mechanisms were demonstrated, based on cell Ca2+ oscillations determined by the activity of channels in the plasma membrane or sarcoplasmic reticulum of vascular cells. However, the possible engagement in vasomotion of cell metabolic oscillations of mitochondrial or glycolytic origin has been poorly explored. Metabolic oscillations associated with the production of ATP energy were previously described in cells, while limited studies have investigated these fluctuations in-vivo. Here, we characterised a low-frequency metabolic oscillator (MO-1) in skin from live wild-type and Nrf2−/− mice, by combination of fluorescence spectroscopy and wavelet transform processing technique. Furthermore, the relationships between metabolic and microvascular oscillators were examined during phenylephrine-induced vasoconstriction. We found a significant interaction between MO-1 and the endothelial EDHF vasomotor mechanism that was reduced in the presence of oxidative stress (Nrf2−/− mice). Our findings suggest indirectly that metabolic oscillations may be involved in the mechanisms underlying endothelium-mediated skin vasomotion, which might be altered in the presence of metabolic disturbance.
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245
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Saitou T, Takanezawa S, Ninomiya H, Watanabe T, Yamamoto S, Hiasa Y, Imamura T. Tissue Intrinsic Fluorescence Spectra-Based Digital Pathology of Liver Fibrosis by Marker-Controlled Segmentation. Front Med (Lausanne) 2019; 5:350. [PMID: 30619861 PMCID: PMC6297145 DOI: 10.3389/fmed.2018.00350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 11/28/2018] [Indexed: 01/16/2023] Open
Abstract
Tissue intrinsic emission fluorescence provides useful diagnostic information for various diseases. Because of its unique feature of spectral profiles depending on tissue types, spectroscopic imaging is a promising tool for accurate evaluation of endogenous fluorophores. However, due to difficulties in discriminating those sources, quantitative analysis remains challenging. In this study, we quantitatively investigated spectral-spatial features of multi-photon excitation fluorescence in normal and diseased livers. For morphometrics of multi-photon excitation spectra, we examined a marker-controlled segmentation approach and its application to liver fibrosis assessment by employing a mouse model of carbon tetrachloride (CCl4)-induced liver fibrosis. We formulated a procedure of internal marker selection where markers were chosen to reflect typical biochemical species in the liver, followed by image segmentation and local morphological feature extraction. Image segmentation enabled us to apply mathematical morphology analysis, and the local feature was applied to the automated classification test based on a machine learning framework, both demonstrating highly accurate classifications. Through the analyses, we showed that spectral imaging of native fluorescence from liver tissues have the capability of differentiating not only between normal and diseased, but also between progressive disease states. The proposed approach provides the basics of spectroscopy-based digital histopathology of chronic liver diseases, and can be applied to a range of diseases associated with autofluorescence alterations.
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Affiliation(s)
- Takashi Saitou
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Toon, Japan.,Translational Research Center, Ehime University Hospital, Toon, Japan.,Division of Bio-Imaging, Proteo-Science Center (PROS), Ehime University, Toon, Japan
| | - Sota Takanezawa
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Hiroko Ninomiya
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Takao Watanabe
- Department of Gastroenterology and Metabiology, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Shin Yamamoto
- Department of Gastroenterology and Metabiology, Graduate School of Medicine, Ehime University, Toon, Japan.,Department of Lifestyle-related Medicine and Endocrinology, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Yoichi Hiasa
- Department of Gastroenterology and Metabiology, Graduate School of Medicine, Ehime University, Toon, Japan
| | - Takeshi Imamura
- Department of Molecular Medicine for Pathogenesis, Graduate School of Medicine, Ehime University, Toon, Japan.,Translational Research Center, Ehime University Hospital, Toon, Japan.,Division of Bio-Imaging, Proteo-Science Center (PROS), Ehime University, Toon, Japan
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246
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Rizou SV, Evangelou K, Myrianthopoulos V, Mourouzis I, Havaki S, Athanasiou A, Vasileiou PVS, Margetis A, Kotsinas A, Kastrinakis NG, Sfikakis P, Townsend P, Mikros E, Pantos C, Gorgoulis VG. A Novel Quantitative Method for the Detection of Lipofuscin, the Main By-Product of Cellular Senescence, in Fluids. Methods Mol Biol 2019; 1896:119-138. [PMID: 30474845 DOI: 10.1007/978-1-4939-8931-7_12] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Lipofuscin accumulation is a hallmark of senescence. This nondegradable material aggregates in the cytoplasm of stressed or damaged cells due to metabolic imbalance associated with aging and age-related diseases. Indications of a soluble state of lipofuscin have also been provided, rendering the perspective of monitoring such processes via lipofuscin quantification in liquids intriguing. Therefore, the development of an accurate and reliable method is of paramount importance. Currently available assays are characterized by inherent pitfalls which demote their credibility. We herein describe a simple, highly specific and sensitive protocol for measuring lipofuscin levels in any type of liquid. The current method represents an evolution of a previously described assay, developed for in vitro and in vivo senescent cell recognition that exploits a newly synthesized Sudan Black-B analog (GL13). Analysis of human clinical samples with the modified protocol provided strong evidence of its usefulness for the exposure and surveillance of age-related conditions.
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Affiliation(s)
- Sophia V Rizou
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Konstantinos Evangelou
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
- Department of Anatomy-Histology-Embryology, Medical School, University of Ioannina, Ioannina, Greece
| | - Vassilios Myrianthopoulos
- Division of Pharmaceutical Chemistry, School of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
- PharmaInformatics Unit, Athena Research Center, Athens, Greece
| | - Iordanis Mourouzis
- Department of Pharmacology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Sophia Havaki
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Panagiotis V S Vasileiou
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Aggelos Margetis
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Athanassios Kotsinas
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikolaos G Kastrinakis
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Petros Sfikakis
- First Department of Propaedeutic Internal Medicine and Rheumatology Unit, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Paul Townsend
- Faculty Institute for Cancer Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK
| | - Emmanuel Mikros
- Division of Pharmaceutical Chemistry, School of Pharmacy, National and Kapodistrian University of Athens, Athens, Greece
- PharmaInformatics Unit, Athena Research Center, Athens, Greece
| | - Constantinos Pantos
- Department of Pharmacology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | - Vassilis G Gorgoulis
- Molecular Carcinogenesis Group, Department of Histology and Embryology, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
- Faculty Institute for Cancer Sciences, Manchester Academic Health Sciences Centre, University of Manchester, Manchester, UK.
- Biomedical Research Foundation, Academy of Athens, Athens, Greece.
- Center for New Biotechnologies and Precision Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece.
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247
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Reismann AWAF, Atanasova L, Schrangl L, Zeilinger S, Schütz GJ. Temporal Filtering to Improve Single Molecule Identification in High Background Samples. Molecules 2018; 23:molecules23123338. [PMID: 30562966 PMCID: PMC6321103 DOI: 10.3390/molecules23123338] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 12/06/2018] [Accepted: 12/13/2018] [Indexed: 11/16/2022] Open
Abstract
Single molecule localization microscopy is currently revolutionizing the life sciences as it offers, for the first time, insights into the organization of biological samples below the classical diffraction limit of light microscopy. While there have been numerous examples of new biological findings reported in the last decade, the technique could not reach its full potential due to a set of limitations immanent to the samples themselves. Particularly, high background signals impede the proper performance of most single-molecule identification and localization algorithms. One option is to exploit the characteristic blinking of single molecule signals, which differs substantially from the residual brightness fluctuations of the fluorescence background. To pronounce single molecule signals, we used a temporal high-pass filtering in Fourier space on a pixel-by-pixel basis. We evaluated the performance of temporal filtering by assessing statistical parameters such as true positive rate and false discovery rate. For this, ground truth signals were generated by simulations and overlaid onto experimentally derived movies of samples with high background signals. Compared to the nonfiltered case, we found an improvement of the sensitivity by up to a factor 3.5 while no significant change in the localization accuracy was observable.
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Affiliation(s)
| | - Lea Atanasova
- Institute of Applied Physics, TU Wien, Getreidemarkt 9, A-1060 Vienna, Austria.
- Department of Microbiology, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.
| | - Lukas Schrangl
- Institute of Applied Physics, TU Wien, Getreidemarkt 9, A-1060 Vienna, Austria.
| | - Susanne Zeilinger
- Department of Microbiology, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.
- Institute of Chemical, Environmental and Bioscience Engineering, TU Wien, Gumpendorferstrasse 1a, A-1060 Vienna, Austria.
| | - Gerhard J Schütz
- Institute of Applied Physics, TU Wien, Getreidemarkt 9, A-1060 Vienna, Austria.
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248
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You S, Sun Y, Chaney EJ, Zhao Y, Chen J, Boppart SA, Tu H. Slide-free virtual histochemistry (Part I): development via nonlinear optics. BIOMEDICAL OPTICS EXPRESS 2018; 9:5240-5252. [PMID: 30460125 PMCID: PMC6238939 DOI: 10.1364/boe.9.005240] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 08/16/2018] [Accepted: 09/13/2018] [Indexed: 05/18/2023]
Abstract
Histochemistry is a microscopy-based technology widely used to visualize the molecular distribution in biological tissue. Recent developments in label-free optical imaging has demonstrated the potential to replace the conventional histochemical labels/markers (fluorescent antibodies, organic dyes, nucleic acid probes, and other contrast agents) with diverse optical interactions to generate histochemical contrasts, allowing "virtual" histochemistry in three spatial dimensions without preparing a microscope slide (i.e. labor-intensive sample preparation). However, the histochemical information in a label-free optical image has often been rather limited due to the difficulty in simultaneously generating multiple histochemical contrasts with strict spatial co-registration. Here, in the first part (Part I) of this two-part series study, we develop a technique of slide-free virtual histochemistry based on label-free multimodal multiphoton microscopy, and simultaneously generate up to four histochemical contrasts from in vivo animal and ex vivo human tissue. To enable this functionality, we construct and demonstrate a robust fiber-based laser source for clinical translation and phenotype a wide variety of vital cells in unperturbed mammary tissue.
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Affiliation(s)
- Sixian You
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yi Sun
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Eric J Chaney
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Youbo Zhao
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Jianxin Chen
- Fujian Provincial Key Laboratory for Photonics Technology, Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education, Fujian Normal University, Fuzhou, 350007, China
| | - Stephen A Boppart
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
- Department of Electrical and Computer Engineering, Carle-Illinois College of Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Haohua Tu
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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249
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Carver GE, Locknar SA, Weaver DL, Stein JL, Stein GS. Real-time detection of breast cancer at the cellular level. J Cell Physiol 2018; 234:5413-5419. [PMID: 30362286 DOI: 10.1002/jcp.27451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 08/29/2018] [Indexed: 11/05/2022]
Abstract
Novel optoelectronic instrumentation has been developed for the multispectral imaging of autofluorescence emitted by metabolic fluorophores. The images resolve individual cells while spectra are collected for each pixel in the images. These datacubes are generated at a rate of 10 per second-fast enough for surgical guidance. The data is processed in real time to provide a single color-coded image to the surgeon. To date, the system has been applied to fresh, ex vivo, human surgical specimens and has distinguished breast cancer from benign tissue. The approach is applicable to in vivo measurements of surgical margins and needle-based optical biopsies. Ongoing work demonstrates that the system has great potential for translation to a hand-held probe with high sensitivity and specificity.
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Affiliation(s)
| | | | - Donald L Weaver
- Department of Pathology and Laboratory Medicine, University of Vermont Cancer Center, Burlington, Vermont
| | - Janet L Stein
- Department of Biochemistry, University of Vermont Cancer Center, Burlington, Vermont
| | - Gary S Stein
- Department of Pathology and Laboratory Medicine, University of Vermont Cancer Center, Burlington, Vermont
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250
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Patterson NH, Tuck M, Lewis A, Kaushansky A, Norris JL, Van de Plas R, Caprioli RM. Next Generation Histology-Directed Imaging Mass Spectrometry Driven by Autofluorescence Microscopy. Anal Chem 2018; 90:12404-12413. [PMID: 30274514 DOI: 10.1021/acs.analchem.8b02885] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Histology-directed imaging mass spectrometry (IMS) is a spatially targeted IMS acquisition method informed by expert annotation that provides rapid molecular characterization of select tissue structures. The expert annotations are usually determined on digital whole slide images of histological stains where the staining preparation is incompatible with optimal IMS preparation, necessitating serial sections: one for annotation, one for IMS. Registration is then used to align staining annotations onto the IMS tissue section. Herein, we report a next-generation histology-directed platform implementing IMS-compatible autofluorescence (AF) microscopy taken prior to any staining or IMS. The platform enables two histology-directed workflows, one that improves the registration process between two separate tissue sections using automated, computational monomodal AF-to-AF microscopy image registration, and a registration-free approach that utilizes AF directly to identify ROIs and acquire IMS on the same section. The registration approach is fully automated and delivers state of the art accuracy in histology-directed workflows for transfer of annotations (∼3-10 μm based on 4 organs from 2 species) while the direct AF approach is registration-free, allowing targeting of the finest structures visible by AF microscopy. We demonstrate the platform in biologically relevant case studies of liver stage malaria and human kidney disease with spatially targeted acquisition of sparsely distributed (composing less than one tenth of 1% of the tissue section area) malaria infected mouse hepatocytes and glomeruli in the human kidney case study.
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Affiliation(s)
| | | | - Adam Lewis
- Center for Infectious Disease Research , formerly Seattle Biomedical Research Institute, Seattle , Washington 98109 , United States.,Department of Global Health , University of Washington , Seattle , Washington 98195 , United States
| | - Alexis Kaushansky
- Center for Infectious Disease Research , formerly Seattle Biomedical Research Institute, Seattle , Washington 98109 , United States.,Department of Global Health , University of Washington , Seattle , Washington 98195 , United States
| | | | - Raf Van de Plas
- Delft Center for Systems and Control (DCSC) , Delft University of Technology , 2628 CD , Delft , The Netherlands
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