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Lookin O, de Tombe P, Boulali N, Gergely C, Cloitre T, Cazorla O. Cardiomyocyte sarcomere length variability: Membrane fluorescence versus second harmonic generation myosin imaging. J Gen Physiol 2023; 155:213827. [PMID: 36695814 PMCID: PMC9930136 DOI: 10.1085/jgp.202213289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/07/2022] [Accepted: 01/10/2023] [Indexed: 01/26/2023] Open
Abstract
Sarcomere length (SL) and its variation along the myofibril strongly regulate integrated coordinated myocyte contraction. It is therefore important to obtain individual SL properties. Optical imaging by confocal fluorescence (for example, using ANEPPS) or transmitted light microscopy is often used for this purpose. However, this allows for the visualization of structures related to Z-disks only. In contrast, second-harmonic generation (SHG) microscopy visualizes A-band sarcomeric structures directly. Here, we compared averaged SL and its variability in isolated relaxed rat cardiomyocytes by imaging with ANEPPS and SHG. We found that SL variability, evaluated by several absolute and relative measures, is two times smaller using SHG vs. ANEPPS, while both optical methods give the same average (median) SL. We conclude that optical methods with similar optical spatial resolution provide valid estimations of average SL, but the use of SHG microscopy for visualization of sarcomeric A-bands may be the "gold standard" for evaluation of SL variability due to the absence of optical interference between the sarcomere center and non-sarcomeric structures. This contrasts with sarcomere edges where t-tubules may not consistently colocalize to Z-disks. The use of SHG microscopy instead of fluorescent imaging can be a prospective tool to map sarcomere variability both in vitro and in vivo conditions and to reveal its role in the functional behavior of living myocardium.
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Affiliation(s)
- Oleg Lookin
- Institute of Immunology and Physiology , Ural Branch of Russian Academy of Sciences , Yekaterinburg, Russia
| | - Pieter de Tombe
- Laboratory "Physiologie et Médecine Expérimentale du Coeur et des Muscles", Phymedexp, INSERM, CNRS, Montpellier University , Montpellier, France.,Physiology and Biophysics, University of Illinois at Chicago , Chicago, IL, USA
| | - Najlae Boulali
- Laboratory "Physiologie et Médecine Expérimentale du Coeur et des Muscles", Phymedexp, INSERM, CNRS, Montpellier University , Montpellier, France
| | - Csilla Gergely
- L2C, University of Montpellier , CNRS , Montpellier, France
| | | | - Olivier Cazorla
- Laboratory "Physiologie et Médecine Expérimentale du Coeur et des Muscles", Phymedexp, INSERM, CNRS, Montpellier University , Montpellier, France
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2
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Pinsard M, Schmeltz M, van der Kolk J, Patten SA, Ibrahim H, Ramunno L, Schanne-Klein MC, Légaré F. Elimination of imaging artifacts in second harmonic generation microscopy using interferometry. BIOMEDICAL OPTICS EXPRESS 2019; 10:3938-3952. [PMID: 31452986 PMCID: PMC6701527 DOI: 10.1364/boe.10.003938] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 06/17/2019] [Accepted: 06/17/2019] [Indexed: 05/26/2023]
Abstract
Conventional second harmonic generation (SHG) microscopy might not clearly reveal the structure of complex samples if the interference between all scatterers in the focal volume results in artefactual patterns. We report here the use of interferometric second harmonic generation (I-SHG) microscopy to efficiently remove these artifacts from SHG images. Interfaces between two regions of opposite polarity are considered because they are known to produce imaging artifacts in muscle for instance. As a model system, such interfaces are first studied in periodically-poled lithium niobate (PPLN), where an artefactual incoherent SH signal is obtained because of irregularities at the interfaces, that overshadow the sought-after coherent contribution. Using I-SHG allows to remove the incoherent part completely without any spatial filtering. Second, I-SHG is also proven to resolve the double-band pattern expected in muscle where standard SHG exhibits in some regions artefactual single-band patterns. In addition to removing the artifacts at the interfaces between antiparallel domains in both structures (PPLN and muscle), I-SHG also increases their visibility by up to a factor of 5. This demonstrates that I-SHG is a powerful technique to image biological samples at enhanced contrast while suppressing artifacts.
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Affiliation(s)
- Maxime Pinsard
- Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications (INRS-EMT); 1650 Boul. Lionel-Boulet, Varennes (QC), J3X 1S2, Canada
| | - Margaux Schmeltz
- Laboratoire d'Optique et Biosciences (LOB), École Polytechnique, CNRS, Inserm, Institut Polytechnique de Paris, F-91128 Palaiseau, France
| | - Jarno van der Kolk
- Department of Physics and Centre for Research in Photonics, University of Ottawa, Ottawa (ON), K1N 6N5, Canada
| | | | - Heide Ibrahim
- Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications (INRS-EMT); 1650 Boul. Lionel-Boulet, Varennes (QC), J3X 1S2, Canada
| | - Lora Ramunno
- Department of Physics and Centre for Research in Photonics, University of Ottawa, Ottawa (ON), K1N 6N5, Canada
| | - Marie-Claire Schanne-Klein
- Laboratoire d'Optique et Biosciences (LOB), École Polytechnique, CNRS, Inserm, Institut Polytechnique de Paris, F-91128 Palaiseau, France
| | - François Légaré
- Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications (INRS-EMT); 1650 Boul. Lionel-Boulet, Varennes (QC), J3X 1S2, Canada
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3
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Dubreuil M, Tissier F, Le Roy L, Pennec JP, Rivet S, Giroux-Metges MA, Le Grand Y. Polarization-resolved second harmonic microscopy of skeletal muscle in sepsis. BIOMEDICAL OPTICS EXPRESS 2018; 9:6350-6358. [PMID: 31065433 PMCID: PMC6490978 DOI: 10.1364/boe.9.006350] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/07/2018] [Accepted: 11/11/2018] [Indexed: 05/03/2023]
Abstract
Polarization-resolved second harmonic generation (P-SHG) microscopy is able to probe the sub-micrometer structural organization of myosin filaments within skeletal muscle. In this study, P-SHG microscopy was used to analyze the structural consequences of sepsis, which is the main cause of the critical illness polyneuromyopathy (CIPNM). Experiments conducted on two populations of rats demonstrated a significant difference of the anisotropy parameter between healthy and septic groups, indicating that P-SHG microscopy is promising for the diagnosis of CIPNM. The difference, which can be attributed to a change of myosin conformation at the sub-sarcomere scale, cannot be evidenced by classical SHG imaging.
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Affiliation(s)
- Matthieu Dubreuil
- Université de Bretagne Occidentale, Laboratoire d’optique et de magnétisme OPTIMAG EA 938, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Florine Tissier
- Université de Bretagne Occidentale, Laboratoire optimisation des régulations physiologiques ORPHY EA 4324, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Lucas Le Roy
- Université de Bretagne Occidentale, Laboratoire optimisation des régulations physiologiques ORPHY EA 4324, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Jean-Pierre Pennec
- Université de Bretagne Occidentale, Laboratoire optimisation des régulations physiologiques ORPHY EA 4324, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Sylvain Rivet
- Université de Bretagne Occidentale, Laboratoire d’optique et de magnétisme OPTIMAG EA 938, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Marie-Agnès Giroux-Metges
- Université de Bretagne Occidentale, Laboratoire optimisation des régulations physiologiques ORPHY EA 4324, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
| | - Yann Le Grand
- Université de Bretagne Occidentale, Laboratoire d’optique et de magnétisme OPTIMAG EA 938, IBSAM, 6 avenue Le Gorgeu, Brest, 29238, France
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4
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Iyer SR, Shah SB, Valencia AP, Schneider MF, Hernández-Ochoa EO, Stains JP, Blemker SS, Lovering RM. Altered nuclear dynamics in MDX myofibers. J Appl Physiol (1985) 2016; 122:470-481. [PMID: 27979987 DOI: 10.1152/japplphysiol.00857.2016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 12/02/2016] [Accepted: 12/06/2016] [Indexed: 01/17/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is a genetic disorder in which the absence of dystrophin leads to progressive muscle degeneration and weakness. Although the genetic basis is known, the pathophysiology of dystrophic skeletal muscle remains unclear. We examined nuclear movement in wild-type (WT) and muscular dystrophy mouse model for DMD (MDX) (dystrophin-null) mouse myofibers. We also examined expression of proteins in the linkers of nucleoskeleton and cytoskeleton (LINC) complex, as well as nuclear transcriptional activity via histone H3 acetylation and polyadenylate-binding nuclear protein-1. Because movement of nuclei is not only LINC dependent but also microtubule dependent, we analyzed microtubule density and organization in WT and MDX myofibers, including the application of a unique 3D tool to assess microtubule core structure. Nuclei in MDX myofibers were more mobile than in WT myofibers for both distance traveled and velocity. MDX muscle shows reduced expression and labeling intensity of nesprin-1, a LINC protein that attaches the nucleus to the microtubule and actin cytoskeleton. MDX nuclei also showed altered transcriptional activity. Previous studies established that microtubule structure at the cortex is disrupted in MDX myofibers; our analyses extend these findings by showing that microtubule structure in the core is also disrupted. In addition, we studied malformed MDX myofibers to better understand the role of altered myofiber morphology vs. microtubule architecture in the underlying susceptibility to injury seen in dystrophic muscles. We incorporated morphological and microtubule architectural concepts into a simplified finite element mathematical model of myofiber mechanics, which suggests a greater contribution of myofiber morphology than microtubule structure to muscle biomechanical performance.NEW & NOTEWORTHY Microtubules provide the means for nuclear movement but show altered organization in the muscular dystrophy mouse model (MDX) (dystrophin-null) muscle. Here, MDX myofibers show increased nuclear movement, altered transcriptional activity, and altered linkers of nucleoskeleton and cytoskeleton complex expression compared with healthy myofibers. Microtubule architecture was incorporated in finite element modeling of passive stretch, revealing a role of fiber malformation, commonly found in MDX muscle. The results suggest that alterations in microtubule architecture in MDX muscle affect nuclear movement, which is essential for muscle function.
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Affiliation(s)
- Shama R Iyer
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Sameer B Shah
- Departments of Orthopaedic Surgery and Bioengineering, University of California San Diego, La Jolla, California
| | - Ana P Valencia
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Martin F Schneider
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland
| | - Erick O Hernández-Ochoa
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland
| | - Joseph P Stains
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland
| | - Silvia S Blemker
- Department of Biomedical Engineering and Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia; and
| | - Richard M Lovering
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland; .,Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland
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5
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Ibrahim A, Souissi A, Leray A, Héliot L, Vandenbunder B, Souissi S. Myofibril Changes in the Copepod Pseudodiaptomus marinus Exposed to Haline and Thermal Stresses. PLoS One 2016; 11:e0164770. [PMID: 27824880 PMCID: PMC5100916 DOI: 10.1371/journal.pone.0164770] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 09/30/2016] [Indexed: 11/19/2022] Open
Abstract
Copepods are small crustaceans capable to survive in various aquatic environments. Their responses to changes in different external factors such as salinity and temperature can be observed at different integration levels from copepod genes to copepod communities. Until now, no thorough observation of the temperature or salinity effect stresses on copepods has been done by optical microscopy. In this study, we used autofluorescence to visualize these effects on the morphology of the calanoid copepod Pseudodiaptomus marinus maintained during several generations in the laboratory at favorable and stable conditions of salinity (30 psu) and temperature (18°C). Four different stress experiments were conducted: at a sharp decrease in temperature (18 to 4°C), a moderate decrease in salinity (from 30 to 15 psu), a major decrease in salinity (from 30 to 0 psu), and finally a combined stress with a decrease in both temperature and salinity (from 18°C and 30 psu to 4°C and 0 psu). After these stresses, images acquired by confocal laser scanning microscopy (CLSM) revealed changes in copepod cuticle and muscle structure. Low salinity and/or temperature stresses affected both the detection of fluorescence emitted by muscle sarcomeres and the distance between them. In the remaining paper we will use the term sarcomeres to describe the elements located within sarcomeres and emitted autofluorescence signals. Quantitative study showed an increase in the average distance between two consecutive sarcomeres from 2.06 +/- 0.11 μm to 2.44 +/- 0.42 μm and 2.88 +/- 0.45μm after the exposure to major haline stress (18°C, 0 psu) and the combined stress (4°C, 0 psu), respectively. These stresses also caused cuticle cracks which often occurred at the same location, suggesting the cuticle as a sensitive area for osmoregulation. Our results suggest the use of cuticular and muscle autofluorescence as new biomarkers of stress detectable in formalin-preserved P. marinus individuals. Our label-free method can be easily applied to a large number of other copepod species or invertebrates with striated musculature.
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Affiliation(s)
- Ali Ibrahim
- Interdisciplinary Research Institute, USR 3078 CNRS, University of Lille –Parc scientifique de la Haute Borne, 59650, Villeneuve d'Ascq, France
- Univ. Lille, CNRS, Univ. Littoral Cote d’Opale, UMR 8187 LOG, Laboratoire d’Océanologie et de Géosciences, F-62930, Wimereux, France
| | - Anissa Souissi
- Univ. Lille, CNRS, Univ. Littoral Cote d’Opale, UMR 8187 LOG, Laboratoire d’Océanologie et de Géosciences, F-62930, Wimereux, France
| | - Aymeric Leray
- Interdisciplinary Research Institute, USR 3078 CNRS, University of Lille –Parc scientifique de la Haute Borne, 59650, Villeneuve d'Ascq, France
| | - Laurent Héliot
- Interdisciplinary Research Institute, USR 3078 CNRS, University of Lille –Parc scientifique de la Haute Borne, 59650, Villeneuve d'Ascq, France
| | - Bernard Vandenbunder
- Interdisciplinary Research Institute, USR 3078 CNRS, University of Lille –Parc scientifique de la Haute Borne, 59650, Villeneuve d'Ascq, France
| | - Sami Souissi
- Univ. Lille, CNRS, Univ. Littoral Cote d’Opale, UMR 8187 LOG, Laboratoire d’Océanologie et de Géosciences, F-62930, Wimereux, France
- * E-mail:
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6
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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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7
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Förderer M, Georgiev T, Mosqueira M, Fink RHA, Vogel M. Functional second harmonic generation microscopy probes molecular dynamics with high temporal resolution. BIOMEDICAL OPTICS EXPRESS 2016; 7:525-541. [PMID: 26977360 PMCID: PMC4771469 DOI: 10.1364/boe.7.000525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 12/18/2015] [Accepted: 12/18/2015] [Indexed: 06/05/2023]
Abstract
Second harmonic generation (SHG) microscopy is a powerful tool for label free ex vivo or in vivo imaging, widely used to investigate structure and organization of endogenous SHG emitting proteins such as myosin or collagen. Polarization resolved SHG microscopy renders supplementary information and is used to probe different molecular states. This development towards functional SHG microscopy is calling for new methods for high speed functional imaging of dynamic processes. In this work we present two approaches with linear polarized light and demonstrate high speed line scan measurements of the molecular dynamics of the motor protein myosin with a time resolution of 1 ms in mammalian muscle cells. Such a high speed functional SHG microscopy has high potential to deliver new insights into structural and temporal molecular dynamics under ex vivo or in vivo conditions.
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Affiliation(s)
- Moritz Förderer
- Medical Biophysics Unit, Institute for Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany;
| | - Tihomir Georgiev
- Medical Biophysics Unit, Institute for Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany
| | - Matias Mosqueira
- Medical Biophysics Unit, Institute for Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany
| | - Rainer H A Fink
- Medical Biophysics Unit, Institute for Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany
| | - Martin Vogel
- Medical Biophysics Unit, Institute for Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany; Current address: Max Planck Institute of Biophysics, Frankfurt/Main, Germany;
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8
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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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9
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Georgiev T, Zapiec B, Förderer M, Fink RHA, Vogel M. Colocalization properties of elementary Ca(2+) release signals with structures specific to the contractile filaments and the tubular system of intact mouse skeletal muscle fibers. J Struct Biol 2015; 192:366-375. [PMID: 26431893 DOI: 10.1016/j.jsb.2015.09.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 09/26/2015] [Accepted: 09/29/2015] [Indexed: 11/19/2022]
Abstract
Ca(2+) regulates several important intracellular processes. We combined second harmonic generation (SHG) and two photon excited fluorescence microscopy (2PFM) to simultaneously record the SHG signal of the myosin filaments and localized elementary Ca(2+) release signals (LCSs). We found LCSs associated with Y-shaped structures of the myosin filament pattern (YMs), so called verniers, in intact mouse skeletal muscle fibers under hypertonic treatment. Ion channels crucial for the Ca(2+) regulation are located in the tubular system, a system that is important for Ca(2+) regulation and excitation-contraction coupling. We investigated the tubular system of intact, living mouse skeletal muscle fibers using 2PFM and the fluorescent Ca(2+) indicator Fluo-4 dissolved in the external solution or the membrane dye di-8-ANEPPS. We simultaneously measured the SHG signal from the myosin filaments of the skeletal muscle fibers. We found that at least a subset of the YMs observed in SHG images are closely juxtaposed with Y-shaped structures of the transverse tubules (YTs). The distances of corresponding YMs and YTs yield values between 1.3 μm and 4.1 μm including pixel uncertainty with a mean distance of 2.52±0.10 μm (S.E.M., n=41). Additionally, we observed that some of the linear-shaped areas in the tubular system are colocalized with linear-shaped areas in the SHG images.
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Affiliation(s)
- Tihomir Georgiev
- Medical Biophysics, Institute of Physiology and Pathophysiology, Ruprecht Karls Universität, Im Neuenheimer Feld 326, 69120 Heidelberg, Germany.
| | - Bolek Zapiec
- Medical Biophysics, Institute of Physiology and Pathophysiology, Ruprecht Karls Universität, Im Neuenheimer Feld 326, 69120 Heidelberg, Germany; Max Planck Research Unit for Neurogenetics, 60438 Frankfurt am Main, Germany
| | - Moritz Förderer
- Medical Biophysics, Institute of Physiology and Pathophysiology, Ruprecht Karls Universität, Im Neuenheimer Feld 326, 69120 Heidelberg, Germany
| | - Rainer H A Fink
- Medical Biophysics, Institute of Physiology and Pathophysiology, Ruprecht Karls Universität, Im Neuenheimer Feld 326, 69120 Heidelberg, Germany
| | - Martin Vogel
- Medical Biophysics, Institute of Physiology and Pathophysiology, Ruprecht Karls Universität, Im Neuenheimer Feld 326, 69120 Heidelberg, Germany; Max Planck Research Unit for Neurogenetics, 60438 Frankfurt am Main, Germany.
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10
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Kupfer ME, Ogle BM. Advanced imaging approaches for regenerative medicine: Emerging technologies for monitoring stem cell fate in vitro and in vivo. Biotechnol J 2015; 10:1515-28. [DOI: 10.1002/biot.201400760] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 05/12/2015] [Accepted: 06/17/2015] [Indexed: 12/14/2022]
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11
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Ibrahim A, Hage CH, Souissi A, Leray A, Héliot L, Souissi S, Vandenbunder B. Label-free microscopy and stress responses reveal the functional organization of Pseudodiaptomus marinus copepod myofibrils. J Struct Biol 2015; 191:224-35. [PMID: 26057347 DOI: 10.1016/j.jsb.2015.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 05/28/2015] [Accepted: 06/05/2015] [Indexed: 01/25/2023]
Abstract
Pseudodiaptomus marinus copepods are small crustaceans living in estuarine areas endowed with exceptional swimming and adaptative performances. Since the external cuticle acts as an impermeable barrier for most dyes and molecular tools for labeling copepod proteins with fluorescent tags are not available, imaging cellular organelles in these organisms requires label free microscopy. Complementary nonlinear microscopy techniques have been used to investigate the structure and the response of their myofibrils to abrupt changes of temperature or/and salinity. In contrast with previous observations in vertebrates and invertebrates, the flavin autofluorescence which is a signature of mitochondria activity and the Coherent Anti-Stokes Raman Scattering (CARS) pattern assigned to T-tubules overlapped along myofibrils with the second harmonic generation (SHG) striated pattern generated by myosin tails in sarcomeric A bands. Temperature jumps from 18 to 4 °C or salinity jumps from 30 to 15 psu mostly affected flavin autofluorescence. Severe salinity jumps from 30 to 0 psu dismantled myofibril organization with major changes both in the SHG and CARS patterns. After a double stress (from 18 °C/30 psu to 4° C/0 psu) condensed and distended regions appeared within single myofibrils, with flavin autofluorescence bands located between sarcomeric A bands. These results shed light on the interactions between the different functional compartments which provide fast acting excitation-contraction coupling and adequate power supply in copepods muscles.
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Affiliation(s)
- Ali Ibrahim
- Interdisciplinary Research Institute, USR 3078 CNRS, University of Lille - Parc scientifique de la Haute Borne, 59650 Villeneuve d'Ascq, France; Laboratoire d'Océanologie et de Géosciences, UMR CNRS 8187 LOG, University of Lille, Station Marine de Wimereux, 28 Avenue Foch, 62930 Wimereux, France.
| | - Charles Henri Hage
- Interdisciplinary Research Institute, USR 3078 CNRS, University of Lille - Parc scientifique de la Haute Borne, 59650 Villeneuve d'Ascq, France.
| | - Anissa Souissi
- Laboratoire d'Océanologie et de Géosciences, UMR CNRS 8187 LOG, University of Lille, Station Marine de Wimereux, 28 Avenue Foch, 62930 Wimereux, France.
| | - Aymeric Leray
- Interdisciplinary Research Institute, USR 3078 CNRS, University of Lille - Parc scientifique de la Haute Borne, 59650 Villeneuve d'Ascq, France.
| | - Laurent Héliot
- Interdisciplinary Research Institute, USR 3078 CNRS, University of Lille - Parc scientifique de la Haute Borne, 59650 Villeneuve d'Ascq, France.
| | - Sami Souissi
- Laboratoire d'Océanologie et de Géosciences, UMR CNRS 8187 LOG, University of Lille, Station Marine de Wimereux, 28 Avenue Foch, 62930 Wimereux, France.
| | - Bernard Vandenbunder
- Interdisciplinary Research Institute, USR 3078 CNRS, University of Lille - Parc scientifique de la Haute Borne, 59650 Villeneuve d'Ascq, France.
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12
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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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13
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Garcia-Canadilla P, Gonzalez-Tendero A, Iruretagoyena I, Crispi F, Torre I, Amat-Roldan I, Bijnens BH, Gratacos E. Automated cardiac sarcomere analysis from second harmonic generation images. JOURNAL OF BIOMEDICAL OPTICS 2014; 19:056010. [PMID: 24853145 DOI: 10.1117/1.jbo.19.5.056010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 04/17/2014] [Indexed: 06/03/2023]
Abstract
Automatic quantification of cardiac muscle properties in tissue sections might provide important information related to different types of diseases. Second harmonic generation (SHG) imaging provides a stain-free microscopy approach to image cardiac fibers that, combined with our methodology of the automated measurement of the ultrastructure of muscle fibers, computes a reliable set of quantitative image features (sarcomere length, A-band length, thick-thin interaction length, and fiber orientation). We evaluated the performance of our methodology in computer-generated muscle fibers modeling some artifacts that are present during the image acquisition. Then, we also evaluated it by comparing it to manual measurements in SHG images from cardiac tissue of fetal and adult rabbits. The results showed a good performance of our methodology at high signal-to-noise ratio of 20 dB. We conclude that our automated measurements enable reliable characterization of cardiac fiber tissues to systematically study cardiac tissue in a wide range of conditions.
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Affiliation(s)
- Patricia Garcia-Canadilla
- University of Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), IDIBAPS, and Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona 08028, SpainbUniversitat Pompeu
| | - Anna Gonzalez-Tendero
- University of Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), IDIBAPS, and Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona 08028, Spain
| | - Igor Iruretagoyena
- University of Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), IDIBAPS, and Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona 08028, Spain
| | - Fatima Crispi
- University of Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), IDIBAPS, and Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona 08028, Spain
| | - Iratxe Torre
- University of Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), IDIBAPS, and Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona 08028, Spain
| | - Ivan Amat-Roldan
- University of Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), IDIBAPS, and Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona 08028, Spain
| | - Bart H Bijnens
- Universitat Pompeu Fabra, PhySense, DTIC, Barcelona 08018, SpaincICREA, Barcelona 08010, Spain
| | - Eduard Gratacos
- University of Barcelona, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Déu), IDIBAPS, and Centre for Biomedical Research on Rare Diseases (CIBER-ER), Barcelona 08028, Spain
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14
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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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15
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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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16
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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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17
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Thermal transitions of fibrillar collagen unveiled by second-harmonic generation microscopy of corneal stroma. Biophys J 2013; 103:1179-87. [PMID: 22995490 DOI: 10.1016/j.bpj.2012.07.055] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Revised: 07/19/2012] [Accepted: 07/27/2012] [Indexed: 11/24/2022] Open
Abstract
The thermal transitions of fibrillar collagen are investigated with second-harmonic generation polarization anisotropy microscopy. Second-harmonic generation images and polarization anisotropy profiles of corneal stroma heated in the 35-80°C range are analyzed by means of a theoretical model that is suitable to probe principal intramolecular and interfibrillar parameters of immediate physiological interest. Our results depict the tissue modification with temperature as the interplay of three destructuration stages at different hierarchical levels of collagen assembly including its tertiary structure and interfibrillar alignment, thus supporting and extending previous findings. This method holds the promise of a quantitative inspection of fundamental biophysical and biochemical processes and may find future applications in real-time and postsurgical functional imaging of collagen-rich tissues subjected to thermal treatments.
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18
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Rivard M, Couture CA, Miri AK, Laliberté M, Bertrand-Grenier A, Mongeau L, Légaré F. Imaging the bipolarity of myosin filaments with Interferometric Second Harmonic Generation microscopy. BIOMEDICAL OPTICS EXPRESS 2013; 4:2078-86. [PMID: 24156065 PMCID: PMC3799667 DOI: 10.1364/boe.4.002078] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 08/21/2013] [Accepted: 08/21/2013] [Indexed: 05/18/2023]
Abstract
We report that combining interferometry with Second Harmonic Generation (SHG) microscopy provides valuable information about the relative orientation of noncentrosymmetric structures composing tissues. This is confirmed through the imaging of rat medial gastrocnemius muscle. The inteferometric Second Harmonic Generation (ISHG) images reveal that each side of the myosin filaments composing the A band of the sarcomere generates π phase shifted SHG signal which implies that the myosin proteins at each end of the filaments are oriented in opposite directions. This highlights the bipolar structural organization of the myosin filaments and shows that muscles can be considered as a periodically poled biological structure.
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Affiliation(s)
- Maxime Rivard
- Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, Quebec, J3X 1S2, Canada
| | - Charles-André Couture
- Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, Quebec, J3X 1S2, Canada
| | - Amir K. Miri
- Department of Mechanical Engineering, McGill University, 817 Sherbrooke St. West, Montreal, Quebec, H3A 0C3, Canada
| | - Mathieu Laliberté
- Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, Quebec, J3X 1S2, Canada
| | - Antony Bertrand-Grenier
- Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, Quebec, J3X 1S2, Canada
| | - Luc Mongeau
- Department of Mechanical Engineering, McGill University, 817 Sherbrooke St. West, Montreal, Quebec, H3A 0C3, Canada
| | - François Légaré
- Institut National de la Recherche Scientifique, Centre Énergie Matériaux Télécommunications, 1650 Boulevard Lionel-Boulet, Varennes, Quebec, J3X 1S2, Canada
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19
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Liu H, Shao Y, Qin W, Runyan RB, Xu M, Ma Z, Borg TK, Markwald R, Gao BZ. Myosin filament assembly onto myofibrils in live neonatal cardiomyocytes observed by TPEF-SHG microscopy. Cardiovasc Res 2012; 97:262-70. [PMID: 23118131 DOI: 10.1093/cvr/cvs328] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
AIMS Understanding myofibrillogenesis is essential for elucidating heart muscle formation, development, and remodelling in response to physiological stimulation. Here, we report the dynamic assembly process of contractile myosin filaments onto myofibrils in a live cardiomyocyte culture during myofibrillogenesis. METHODS AND RESULTS Utilizing a custom-built, two-photon excitation fluorescence and second harmonic generation imaging system equipped with an on-stage incubator, we observed new sarcomere additions in rat neonatal cardiomyocytes during 10 h of on-stage incubation. The new sarcomere additions occurred at the side of existing myofibrils, where we observed mature myofibrils acting as templates, or at the interstice of several separated myofibrils. CONCLUSIONS During sarcomeric addition, myosin filaments are assembled onto the premyofibril laterally. This lateral addition, which proceeds stepwise along the axial direction, plays an important role in the accumulation of Z-bodies to form mature Z-disks and in the regulation of sarcomeric alignment during maturation.
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Affiliation(s)
- Honghai Liu
- Department of Bioengineering and COMSET, Clemson University, Clemson, SC 29634, USA
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20
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Liu H, Qin W, Shao Y, Ma Z, Ye T, Borg T, Gao BZ. Myofibrillogenesis in live neonatal cardiomyocytes observed with hybrid two-photon excitation fluorescence-second harmonic generation microscopy. JOURNAL OF BIOMEDICAL OPTICS 2011; 16:126012. [PMID: 22191929 PMCID: PMC3245745 DOI: 10.1117/1.3662457] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We developed a hybrid two-photon excitation fluorescence-second harmonic generation (TPEF-SHG) imaging system with an on-stage incubator for long-term live-cell imaging. Using the imaging system, we observed the addition of new sarcomeres during myofibrillogenesis while a cardiomyocyte was spreading on the substrate. The results suggest that the TPEF-SHG imaging system with an on-stage incubator is an effective tool for investigation of dynamic myofibrillogenesis.
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Affiliation(s)
- Honghai Liu
- Clemson University, Department of Bioengineering and COMSET, Clemson, South Carolina 29634, USA
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21
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Rouède D, Recher G, Bellanger JJ, Lavault MT, Schaub E, Tiaho F. Modeling of supramolecular centrosymmetry effect on sarcomeric SHG intensity pattern of skeletal muscles. Biophys J 2011; 101:494-503. [PMID: 21767503 DOI: 10.1016/j.bpj.2011.05.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 05/25/2011] [Accepted: 05/31/2011] [Indexed: 11/18/2022] Open
Abstract
A theoretical far-field second harmonic generation (SHG) imaging radiation pattern is calculated for muscular myosin taking into account both Gouy effect and light diffraction under high focusing excitation. Theoretical analysis, in agreement with experimental results obtained on healthy Xenopus muscles, shows that the increase on intensity at the middle of the sarcomeric SHG intensity pattern is generated by an off-axis constructive interference related to the specific antipolar distribution of myosin molecules within the sarcomere. The best fit of the experimental sarcomeric SHG intensity pattern was obtained with an estimated size of antiparallel, intrathick filaments' packing-width of 115 ± 25 nm localized at the M-band. During proteolysis, experimental sarcomeric SHG intensity pattern exhibits decrease on intensity at the center of the sarcomere. An effective intra- and interthick filaments centrosymmetry of 320 ± 25 nm, in agreement with ultrastructural disorganization observed at the electron microscopy level, was necessary to fit the experimental sarcomeric SHG intensity pattern. Our results show that sarcomeric SHG intensity pattern is very sensitive to misalignment of thick filaments and highlights the potential usefulness of SHG microscopy to diagnose proteolysis-induced muscular disorders.
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Affiliation(s)
- Denis Rouède
- Institut de Physique de Rennes, UMR UR1-Centre National de la Recherche Scientifique 6251, Rennes, France.
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22
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Huang SH, Hsiao CD, Lin DS, Chow CY, Chang CJ, Liau I. Imaging of zebrafish in vivo with second-harmonic generation reveals shortened sarcomeres associated with myopathy induced by statin. PLoS One 2011; 6:e24764. [PMID: 21966365 PMCID: PMC3179478 DOI: 10.1371/journal.pone.0024764] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2011] [Accepted: 08/17/2011] [Indexed: 01/25/2023] Open
Abstract
We employed second-harmonic generation (SHG) imaging and the zebrafish model to investigate the myopathy caused by statin in vivo with emphasis on the altered microstructures of the muscle sarcomere, the fundamental contractile element of muscles. This approach derives an advantage of SHG imaging to observe the striated skeletal muscle of living zebrafish based on signals produced mainly from the thick myosin filament of sarcomeres without employing exogenous labels, and eliminates concern about the distortion of muscle structures caused by sample preparation in conventional histological examination. The treatment with statin caused a significantly shortened sarcomere relative to an untreated control (1.73±0.09 µm vs 1.91±0.08 µm, P<0.05) while the morphological integrity of the muscle fibers remained largely intact. Mechanistic tests indicated that this microstructural disorder was associated with the biosynthetic pathway of cholesterol, or, specifically, with the impaired production of mevalonate by statins. This microstructural disorder exhibited a strong dependence on both the dosage and the duration of treatment, indicating a possibility to assess the severity of muscle injury according to the altered length of the sarcomeres. In contrast to a conventional assessment of muscle injury using clinical biomarkers in blood, such as creatine kinase that is released from only disrupted myocytes, the ability to determine microstructural modification of sarcomeres allows diagnosis of muscle injury before an onset of conventional clinical symptoms. In light of the increasing prevalence of the incidence of muscle injuries caused by new therapies, our work consolidates the combined use of the zebrafish and SHG imaging as an effective and sensitive means to evaluate the safety profile of new therapeutic targets in vivo.
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Affiliation(s)
- Shih-Hao Huang
- Department of Applied Chemistry, Institute of Molecular Science, National Chiao Tung University, Hsinchu, Taiwan
| | - Chung-Der Hsiao
- Department of Bioscience Technology and Center for Nanotechnology, Chung Yuan Christian University, Chung-Li, Taiwan
| | | | - Cho-Yen Chow
- Department of Applied Chemistry, Institute of Molecular Science, National Chiao Tung University, Hsinchu, Taiwan
| | - Chia-Jen Chang
- Department of Applied Chemistry, Institute of Molecular Science, National Chiao Tung University, Hsinchu, Taiwan
| | - Ian Liau
- Department of Applied Chemistry, Institute of Molecular Science, National Chiao Tung University, Hsinchu, Taiwan
- * E-mail:
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23
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Recher G, Rouède D, Schaub E, Tiaho F. Skeletal muscle sarcomeric SHG patterns photo-conversion by femtosecond infrared laser. BIOMEDICAL OPTICS EXPRESS 2011; 2:374-384. [PMID: 21339882 PMCID: PMC3038452 DOI: 10.1364/boe.2.000374] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 01/14/2011] [Accepted: 01/14/2011] [Indexed: 05/29/2023]
Abstract
Femtosecond laser at 780 nm excitation wavelength was used to photo-convert the physiological sarcomeric single band (SB) second harmonic generation (SHG) pattern into double band (DB) in Xenopus laevis premetamorphic tail muscles. This photo-conversion was found to be a third order non-linear optical process and was drastically reduced at 940 nm excitation wavelength. This effect was no longer observed in paraformaldehyde fixed muscles and was enhanced by hydrogen peroxide. The action of hydrogen peroxide suggests that reactive oxygen species (ROS) could contribute to this photo-conversion. These results demonstrate that sarcomeric DB SHG pattern is a marker of sarcomere photodamage in xenopus tadpole muscles and highlight the need of being very careful at using two-photon excitation while observing living tissues. Moreover they open new avenues for in situ intravital investigation of oxidative stress effects in muscle dysfunctions and diseases.
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Affiliation(s)
- Gaëlle Recher
- Université de Rennes1, Université européenne de Bretagne, UMR CNRS 6026, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Denis Rouède
- Université de Rennes1, Université européenne de Bretagne, UMR CNRS 6251, Institut de Physique de Rennes, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Emmanuel Schaub
- Université de Rennes1, Université européenne de Bretagne, UMR CNRS 6026, Campus de Beaulieu, 35042 Rennes Cedex, France
| | - François Tiaho
- Université de Rennes1, Université européenne de Bretagne, UMR CNRS 6026, Campus de Beaulieu, 35042 Rennes Cedex, France
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24
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RECHER G, ROUÈDE D, TASCON C, D’AMICO LA, TIAHO F. Double-band sarcomeric SHG pattern induced by adult skeletal muscles alteration during myofibrils preparation. J Microsc 2010; 241:207-11. [DOI: 10.1111/j.1365-2818.2010.03425.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Amat-Roldan I, Psilodimitrakopoulos S, Loza-Alvarez P, Artigas D. Fast image analysis in polarization SHG microscopy. OPTICS EXPRESS 2010; 18:17209-19. [PMID: 20721110 DOI: 10.1364/oe.18.017209] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Pixel resolution polarization-sensitive second harmonic generation (PSHG) imaging has been recently shown as a promising imaging modality, by largely enhancing the capabilities of conventional intensity-based SHG microscopy. PSHG is able to obtain structural information from the elementary SHG active structures, which play an important role in many biological processes. Although the technique is of major interest, acquiring such information requires long offline processing, even with current computers. In this paper, we present an approach based on Fourier analysis of the anisotropy signature that allows processing the PSHG images in less than a second in standard single core computers. This represents a temporal improvement of several orders of magnitude compared to conventional fitting algorithms. This opens up the possibility for fast PSHG information with the subsequent benefit of potential use in medical applications.
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Affiliation(s)
- Ivan Amat-Roldan
- ICFO-Institut de Ciències Fotòniques, Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain
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