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Paesen R, Smolders S, Vega JMDH, Eijnde BO, Hansen D, Ameloot M. Fully automated muscle quality assessment by Gabor filtering of second harmonic generation images. JOURNAL OF BIOMEDICAL OPTICS 2016; 21:26003. [PMID: 26848544 DOI: 10.1117/1.jbo.21.2.026003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Accepted: 01/15/2016] [Indexed: 06/05/2023]
Abstract
Although structural changes on the sarcomere level of skeletal muscle are known to occur due to various pathologies, rigorous studies of the reduced sarcomere quality remain scarce. This can possibly be explained by the lack of an objective tool for analyzing and comparing sarcomere images across biological conditions. Recent developments in second harmonic generation (SHG) microscopy and increasing insight into the interpretation of sarcomere SHG intensity profiles have made SHG microscopy a valuable tool to study microstructural properties of sarcomeres. Typically, sarcomere integrity is analyzed by fitting a set of manually selected, one-dimensional SHG intensity profiles with a supramolecular SHG model. To circumvent this tedious manual selection step, we developed a fully automated image analysis procedure to map the sarcomere disorder for the entire image at once. The algorithm relies on a single-frequency wavelet-based Gabor approach and includes a newly developed normalization procedure allowing for unambiguous data interpretation. The method was validated by showing the correlation between the sarcomere disorder, quantified by the M-band size obtained from manually selected profiles, and the normalized Gabor value ranging from 0 to 1 for decreasing disorder. Finally, to elucidate the applicability of our newly developed protocol, Gabor analysis was used to study the effect of experimental autoimmune encephalomyelitis on the sarcomere regularity. We believe that the technique developed in this work holds great promise for high-throughput, unbiased, and automated image analysis to study sarcomere integrity by SHG microscopy.
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Affiliation(s)
- Rik Paesen
- Hasselt University, Biomedical Research Institute, Agoralaan Building C, 3590 Diepenbeek, Belgium
| | - Sophie Smolders
- Hasselt University, Biomedical Research Institute, Agoralaan Building C, 3590 Diepenbeek, Belgium
| | | | - Bert O Eijnde
- Hasselt University, Biomedical Research Institute, Agoralaan Building C, 3590 Diepenbeek, BelgiumbHasselt University, REVAL-Rehabilitation Research Center, Agoralaan Building A, 3590 Diepenbeek, Belgium
| | - Dominique Hansen
- Hasselt University, Biomedical Research Institute, Agoralaan Building C, 3590 Diepenbeek, BelgiumbHasselt University, REVAL-Rehabilitation Research Center, Agoralaan Building A, 3590 Diepenbeek, Belgium
| | - Marcel Ameloot
- Hasselt University, Biomedical Research Institute, Agoralaan Building C, 3590 Diepenbeek, Belgium
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Dempsey WP, Hodas NO, Ponti A, Pantazis P. Determination of the source of SHG verniers in zebrafish skeletal muscle. Sci Rep 2015; 5:18119. [PMID: 26657568 PMCID: PMC4676038 DOI: 10.1038/srep18119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 11/12/2015] [Indexed: 01/24/2023] Open
Abstract
SHG microscopy is an emerging microscopic technique for medically relevant imaging because certain endogenous proteins, such as muscle myosin lattices within muscle cells, are sufficiently spatially ordered to generate detectable SHG without the use of any fluorescent dye. Given that SHG signal is sensitive to the structural state of muscle sarcomeres, SHG functional imaging can give insight into the integrity of muscle cells in vivo. Here, we report a thorough theoretical and experimental characterization of myosin-derived SHG intensity profiles within intact zebrafish skeletal muscle. We determined that “SHG vernier” patterns, regions of bifurcated SHG intensity, are illusory when sarcomeres are staggered with respect to one another. These optical artifacts arise due to the phase coherence of SHG signal generation and the Guoy phase shift of the laser at the focus. In contrast, two-photon excited fluorescence images obtained from fluorescently labeled sarcomeric components do not contain such illusory structures, regardless of the orientation of adjacent myofibers. Based on our results, we assert that complex optical artifacts such as SHG verniers should be taken into account when applying functional SHG imaging as a diagnostic readout for pathological muscle conditions.
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Affiliation(s)
- William P Dempsey
- Department of Biosystems Science and Engineering (D-BSSE), Eidgenössische Technische Hochschule (ETH) Zurich, 4058 Basel, Switzerland
| | - Nathan O Hodas
- Pacific Northwest National Laboratory, Richland, Washington, USA
| | - Aaron Ponti
- Department of Biosystems Science and Engineering (D-BSSE), Eidgenössische Technische Hochschule (ETH) Zurich, 4058 Basel, Switzerland
| | - Periklis Pantazis
- Department of Biosystems Science and Engineering (D-BSSE), Eidgenössische Technische Hochschule (ETH) Zurich, 4058 Basel, Switzerland
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Cardiac atrial appendage stem cells engraft and differentiate into cardiomyocytes in vivo: A new tool for cardiac repair after MI. Int J Cardiol 2015; 201:10-9. [DOI: 10.1016/j.ijcard.2015.07.066] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 06/16/2015] [Accepted: 07/26/2015] [Indexed: 12/22/2022]
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Lynch TL, Sivaguru M, Velayutham M, Cardounel AJ, Michels M, Barefield D, Govindan S, dos Remedios C, van der Velden J, Sadayappan S. Oxidative Stress in Dilated Cardiomyopathy Caused by MYBPC3 Mutation. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:424751. [PMID: 26508994 PMCID: PMC4609873 DOI: 10.1155/2015/424751] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 07/01/2015] [Accepted: 08/09/2015] [Indexed: 01/23/2023]
Abstract
Cardiomyopathies can result from mutations in genes encoding sarcomere proteins including MYBPC3, which encodes cardiac myosin binding protein-C (cMyBP-C). However, whether oxidative stress is augmented due to contractile dysfunction and cardiomyocyte damage in MYBPC3-mutated cardiomyopathies has not been elucidated. To determine whether oxidative stress markers were elevated in MYBPC3-mutated cardiomyopathies, a previously characterized 3-month-old mouse model of dilated cardiomyopathy (DCM) expressing a homozygous MYBPC3 mutation (cMyBP-C((t/t))) was used, compared to wild-type (WT) mice. Echocardiography confirmed decreased percentage of fractional shortening in DCM versus WT hearts. Histopathological analysis indicated a significant increase in myocardial disarray and fibrosis while the second harmonic generation imaging revealed disorganized sarcomeric structure and myocyte damage in DCM hearts when compared to WT hearts. Intriguingly, DCM mouse heart homogenates had decreased glutathione (GSH/GSSG) ratio and increased protein carbonyl and lipid malondialdehyde content compared to WT heart homogenates, consistent with elevated oxidative stress. Importantly, a similar result was observed in human cardiomyopathy heart homogenate samples. These results were further supported by reduced signals for mitochondrial semiquinone radicals and Fe-S clusters in DCM mouse hearts measured using electron paramagnetic resonance spectroscopy. In conclusion, we demonstrate elevated oxidative stress in MYPBC3-mutated DCM mice, which may exacerbate the development of heart failure.
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Affiliation(s)
- Thomas L. Lynch
- Department of Cell and Molecular Physiology, Health Sciences Division, Loyola University Chicago, Maywood, IL 60153, USA
| | - Mayandi Sivaguru
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Murugesan Velayutham
- Department of Cardiothoracic Surgery, University of Pittsburgh Medical Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Arturo J. Cardounel
- Department of Cardiothoracic Surgery, University of Pittsburgh Medical Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Michelle Michels
- Department of Cardiology, Thoraxcenter, Erasmus Medical Center, 's-Gravendijkwal 230, 3015 CE Rotterdam, Netherlands
| | - David Barefield
- Department of Cell and Molecular Physiology, Health Sciences Division, Loyola University Chicago, Maywood, IL 60153, USA
| | - Suresh Govindan
- Department of Cell and Molecular Physiology, Health Sciences Division, Loyola University Chicago, Maywood, IL 60153, USA
| | - Cristobal dos Remedios
- Bosch Institute, Discipline of Anatomy and Histology, University of Sydney, Sydney, NSW 2006, Australia
| | - Jolanda van der Velden
- Laboratory for Physiology, Institute for Cardiovascular Research, VU University Medical Center, van der Boechorststraat 7, 1081 BT Amsterdam, Netherlands
| | - Sakthivel Sadayappan
- Department of Cell and Molecular Physiology, Health Sciences Division, Loyola University Chicago, Maywood, IL 60153, USA
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Recher G, Coumailleau P, Rouède D, Tiaho F. Structural origin of the drastic modification of second harmonic generation intensity pattern occurring in tail muscles of climax stages xenopus tadpoles. J Struct Biol 2015; 190:1-10. [PMID: 25770062 DOI: 10.1016/j.jsb.2015.03.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 02/08/2015] [Accepted: 03/04/2015] [Indexed: 01/27/2023]
Abstract
Second harmonic generation (SHG) microscopy is a powerful tool for studying submicron architecture of muscles tissues. Using this technique, we show that the canonical single frequency sarcomeric SHG intensity pattern (SHG-IP) of premetamorphic xenopus tadpole tail muscles is converted to double frequency (2f) sarcomeric SHG-IP in metamorphic climax stages due to massive physiological muscle proteolysis. This conversion was found to rise from 7% in premetamorphic muscles to about 97% in fragmented muscular apoptotic bodies. Moreover a 66% conversion was also found in non-fragmented metamorphic tail muscles. Also, a strong correlation between predominant 2f sarcomeric SHG-IPs and myofibrillar misalignment is established with electron microscopy. Experimental and theoretical results demonstrate the higher sensitivity and the supra resolution power of SHG microscopy over TPEF to reveal 3D myofibrillar misalignment. From this study, we suggest that 2f sarcomeric SHG-IP could be used as signature of triad defect and disruption of excitation-contraction coupling. As the mechanism of muscle proteolysis is similar to that found in mdx mouse muscles, we further suggest that xenopus tadpole tail resorption at climax stages could be used as an alternative or complementary model of Duchene muscular dystrophy.
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Affiliation(s)
- Gaëlle Recher
- UMR CNRS 6026, Université de Rennes1, Campus de Beaulieu, Rennes F-35000, France; Department of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge CB2 3DY, UK
| | - Pascal Coumailleau
- UMR CNRS 6026, Université de Rennes1, Campus de Beaulieu, Rennes F-35000, France; IRSET, INSERM, U1085, Université de Rennes1, Campus de Beaulieu, Rennes F-35000, France
| | - Denis Rouède
- IPR, CNRS, UMR-CNRS UR1-6251, Université de Rennes1, Campus de Beaulieu, Rennes F-35000, France
| | - François Tiaho
- UMR CNRS 6026, Université de Rennes1, Campus de Beaulieu, Rennes F-35000, France; IRSET, INSERM, U1085, Université de Rennes1, Campus de Beaulieu, Rennes F-35000, France.
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Rouède D, Coumailleau P, Schaub E, Bellanger JJ, Blanchard-Desce M, Tiaho F. Myofibrillar misalignment correlated to triad disappearance of mdx mouse gastrocnemius muscle probed by SHG microscopy. BIOMEDICAL OPTICS EXPRESS 2014; 5:858-875. [PMID: 24688819 PMCID: PMC3959848 DOI: 10.1364/boe.5.000858] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 01/15/2014] [Accepted: 01/19/2014] [Indexed: 06/03/2023]
Abstract
We show that the canonical single frequency sarcomeric SHG intensity pattern (SHG-IP) of control muscles is converted to double frequency sarcomeric SHG-IP in preserved mdx mouse gastrocnemius muscles in the vicinity of necrotic fibers. These double frequency sarcomeric SHG-IPs are often spatially correlated to double frequency sarcomeric two-photon excitation fluorescence (TPEF) emitted from Z-line and I-bands and to one centered spot SHG angular intensity pattern (SHG-AIP) suggesting that these patterns are signature of myofibrillar misalignement. This latter is confirmed with transmission electron microscopy (TEM). Moreover, a good spatial correlation between SHG signature of myofibrillar misalignment and triad reduction is established. Theoretical simulation of sarcomeric SHG-IP is used to demonstrate the correlation between change of SHG-IP and -AIP and myofibrillar misalignment. The extreme sensitivity of SHG microscopy to reveal the submicrometric organization of A-band thick filaments is highlighted. This report is a first step toward future studies aimed at establishing live SHG signature of myofibrillar misalignment involving excitation contraction defects due to muscle damage and disease.
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Affiliation(s)
- Denis Rouède
- IPR, CNRS, UMR-CNRS UR1- 6251, Université de Rennes1, Campus de Beaulieu, Rennes, F-35000, France
| | - Pascal Coumailleau
- IRSET, INSERM, U1085, Université de Rennes1, Campus de Beaulieu, Rennes, F-35000, France
| | - Emmanuel Schaub
- IPR, CNRS, UMR-CNRS UR1- 6251, Université de Rennes1, Campus de Beaulieu, Rennes, F-35000, France
| | | | | | - François Tiaho
- IRSET, INSERM, U1085, Université de Rennes1, Campus de Beaulieu, Rennes, F-35000, France
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Theoretical and experimental SHG angular intensity patterns from healthy and proteolysed muscles. Biophys J 2013; 104:1959-68. [PMID: 23663839 DOI: 10.1016/j.bpj.2013.02.047] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Revised: 02/01/2013] [Accepted: 02/27/2013] [Indexed: 11/23/2022] Open
Abstract
SHG angular intensity pattern (SHG-AIP) of healthy and proteolysed muscle tissues are simulated and imaged here for the first time to our knowledge. The role of the spatial distribution of second-order nonlinear emitters on SHG-AIP is highlighted. SHG-AIP with two symmetrical spots is found to be a signature of healthy muscle whereas SHG-AIP with one centered spot in pathological mdx muscle is found to be a signature of myofibrillar disorder. We also show that SHG-AIP provides information on the three-dimensional structural organization of myofibrils in physiological and proteolysed muscle. Our results open an avenue for future studies aimed at unraveling more complex physiological and pathological fibrillar tissues organization.
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Rouède D, Bellanger JJ, Recher G, Tiaho F. Study of the effect of myofibrillar misalignment on the sarcomeric SHG intensity pattern. OPTICS EXPRESS 2013; 21:11404-11414. [PMID: 23669997 DOI: 10.1364/oe.21.011404] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present a theoretical simulation of the sarcomeric SHG intensity pattern (SHG-IP) that takes into account myofibrillar misalignment that is experimentally observed in SHG images of proteolysed muscles. The model predicts that myofibrillar displacement results in the conversion from one peak (1P) to two peaks (2P) sarcomeric SHG-IP in agreement with experimental results. This study suggests that sarcomeric SHG-IP is a powerful tool for mapping spatial myofibrillar displacement and its related excitation-contraction disruption that could occur during muscle physiological adaptation and disease.
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Affiliation(s)
- Denis Rouède
- Institut de Physique de Rennes, Département d'Optique, UMR UR1-CNRS 6251, Université de Rennes1, Campus de Beaulieu, 35042 Rennes CEDEX, France.
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Chen WL, Hu PS, Ghazaryan A, Chen SJ, Tsai TH, Dong CY. Quantitative analysis of multiphoton excitation autofluorescence and second harmonic generation imaging for medical diagnosis. Comput Med Imaging Graph 2012; 36:519-26. [PMID: 22824186 DOI: 10.1016/j.compmedimag.2012.06.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 06/05/2012] [Accepted: 06/15/2012] [Indexed: 11/26/2022]
Abstract
In recent years, two-photon excitation fluorescence and second harmonic generation microscopy has become an important tool in biomedical research. The ability of two-photon microscopy to achieve optical sectioning with minimal invasiveness is particularly advantageous for biomedical diagnosis. Advances in the miniaturization of the imaging system have increased its clinical potential, together with the development of quantitative technique for the analysis of data acquired using these imaging modalities. We present a review of the quantitative analysis techniques that have been used successfully with two-photon excitation fluorescence and SHG imaging. Specifically, quantification techniques using ratiometric, morphological, and structural differences to analyze two-photon images will be discussed, and their effectiveness at evaluating dermal and corneal pathologies and cancerous tumor growth will be described.
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Affiliation(s)
- Wei-Liang Chen
- Department of Physics, National Taiwan University, Taipei, Taiwan.
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