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Sturny R, Boulgakoff L, Kelly RG, Miquerol L. Transient formation of collaterals contributes to the restoration of the arterial tree during cardiac regeneration in neonatal mice. J Mol Cell Cardiol 2024; 195:1-13. [PMID: 39038734 DOI: 10.1016/j.yjmcc.2024.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 06/25/2024] [Accepted: 07/16/2024] [Indexed: 07/24/2024]
Abstract
Revascularization of ischemic myocardium following cardiac damage is an important step in cardiac regeneration. However, the mechanism of arteriogenesis has not been well described during cardiac regeneration. Here we investigated coronary artery remodeling and collateral growth during cardiac regeneration. Neonatal MI was induced by ligature of the left descending artery (LAD) in postnatal day (P) 1 or P7 pups from the Cx40-GFP mouse line and the arterial tree was reconstructed in 3D from images of cleared hearts collected at 1, 2, 4, 7 and 14 days after infarction. We show a rapid remodeling of the left coronary arterial tree induced by neonatal MI and the formation of numerous collateral arteries, which are transient in regenerating hearts after MI at P1 and persistent in non-regenerating hearts after MI at P7. This difference is accompanied by restoration of a perfused or a non-perfused LAD following MI at P1 or P7 respectively. Interestingly, collaterals ameliorate cardiac perfusion and drive LAD repair, and lineage tracing analysis demonstrates that the restoration of the LAD occurs by remodeling of pre-existing arterial cells independently of whether they originate in large arteries or arterioles. These results demonstrate that the restoration of the LAD artery during cardiac regeneration occurs by pruning as the rapidly forming collaterals that support perfusion of the disconnected lower LAD subsequently disappear on restoration of a unique LAD. These results highlight a rapid phase of arterial remodeling that plays an important role in vascular repair during cardiac regeneration.
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Affiliation(s)
- Rachel Sturny
- Aix-Marseille Université, CNRS IBDM UMR7288, Marseille, France
| | | | - Robert G Kelly
- Aix-Marseille Université, CNRS IBDM UMR7288, Marseille, France
| | - Lucile Miquerol
- Aix-Marseille Université, CNRS IBDM UMR7288, Marseille, France
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2
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Chlupac J, Frank J, Sedmera D, Fabian O, Simunkova Z, Mrazova I, Novak T, Vanourková Z, Benada O, Pulda Z, Adla T, Kveton M, Lodererova A, Voska L, Pirk J, Fronek J. External Support of Autologous Internal Jugular Vein Grafts with FRAME Mesh in a Porcine Carotid Artery Model. Biomedicines 2024; 12:1335. [PMID: 38927542 PMCID: PMC11201386 DOI: 10.3390/biomedicines12061335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 05/28/2024] [Accepted: 06/12/2024] [Indexed: 06/28/2024] Open
Abstract
BACKGROUND Autologous vein grafts are widely used for bypass procedures in cardiovascular surgery. However, these grafts are susceptible to failure due to vein graft disease. Our study aimed to evaluate the impact of the latest-generation FRAME external support on vein graft remodeling in a preclinical model. METHODS We performed autologous internal jugular vein interposition grafting in porcine carotid arteries for one month. Four grafts were supported with a FRAME mesh, while seven unsupported grafts served as controls. The conduits were examined through flowmetry, angiography, macroscopy, and microscopy. RESULTS The one-month patency rate of FRAME-supported grafts was 100% (4/4), whereas that of unsupported controls was 43% (3/7, Log-rank p = 0.071). On explant angiography, FRAME grafts exhibited significantly more areas with no or mild stenosis (9/12) compared to control grafts (3/21, p = 0.0009). Blood flow at explantation was higher in the FRAME grafts (145 ± 51 mL/min) than in the controls (46 ± 85 mL/min, p = 0.066). Area and thickness of neo-intimal hyperplasia (NIH) at proximal anastomoses were similar for the FRAME and the control groups: 5.79 ± 1.38 versus 6.94 ± 1.10 mm2, respectively (p = 0.558) and 480 ± 95 vs. 587 ± 52 μm2/μm, respectively (p = 0.401). However, in the midgraft portions, the NIH area and thickness were significantly lower in the FRAME group than in the control group: 3.73 ± 0.64 vs. 6.27 ± 0.64 mm2, respectively (p = 0.022) and 258 ± 49 vs. 518 ± 36 μm2/μm, respectively (p = 0.0002). CONCLUSIONS In our porcine model, the external mesh FRAME improved the patency of vein-to-carotid artery grafts and protected them from stenosis, particularly in the mid regions. The midgraft neo-intimal hyperplasia was two-fold thinner in the meshed grafts than in the controls.
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Affiliation(s)
- Jaroslav Chlupac
- Transplantation Surgery Department, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (J.F.); (T.N.); (J.F.)
- Department of Anatomy, Second Faculty of Medicine, Charles University, V Uvalu 84, 150 06 Prague, Czech Republic
| | - Jan Frank
- Transplantation Surgery Department, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (J.F.); (T.N.); (J.F.)
| | - David Sedmera
- Institute of Anatomy, First Faculty of Medicine, Charles University, U Nemocnice 3, Praha 2, 128 00 Prague, Czech Republic;
| | - Ondrej Fabian
- Clinical and Transplant Pathology Centre, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (O.F.); (M.K.); (A.L.); (L.V.)
- Department of Pathology and Molecular Medicine, Third Faculty of Medicine, Charles University, and Thomayer University Hospital, Ruska 87, 100 00 Prague, Czech Republic
| | - Zuzana Simunkova
- Experimental Medicine Centre, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (Z.S.); (I.M.); (Z.V.)
| | - Iveta Mrazova
- Experimental Medicine Centre, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (Z.S.); (I.M.); (Z.V.)
| | - Tomas Novak
- Transplantation Surgery Department, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (J.F.); (T.N.); (J.F.)
| | - Zdenka Vanourková
- Experimental Medicine Centre, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (Z.S.); (I.M.); (Z.V.)
| | - Oldrich Benada
- Laboratory of Molecular Structure Characterization, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 142 00 Prague, Czech Republic;
| | - Zdenek Pulda
- Department of Imaging Methods, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (Z.P.); (T.A.)
| | - Theodor Adla
- Department of Imaging Methods, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (Z.P.); (T.A.)
| | - Martin Kveton
- Clinical and Transplant Pathology Centre, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (O.F.); (M.K.); (A.L.); (L.V.)
- Third Faculty of Medicine, Charles University, Ruska 87, 100 00 Prague, Czech Republic
| | - Alena Lodererova
- Clinical and Transplant Pathology Centre, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (O.F.); (M.K.); (A.L.); (L.V.)
| | - Ludek Voska
- Clinical and Transplant Pathology Centre, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (O.F.); (M.K.); (A.L.); (L.V.)
| | - Jan Pirk
- Cardiovascular Surgery Department, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic;
| | - Jiri Fronek
- Transplantation Surgery Department, Institute for Clinical and Experimental Medicine (IKEM), Videnska 1958/9, 140 21 Prague, Czech Republic; (J.F.); (T.N.); (J.F.)
- Department of Anatomy, Second Faculty of Medicine, Charles University, V Uvalu 84, 150 06 Prague, Czech Republic
- First Surgical Clinic, First Faculty of Medicine, Charles University, U Nemocnice 499/2, 128 08 Prague, Czech Republic
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3
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Xie DF, Crouzet C, LoPresti K, Wang Y, Robinson C, Jones W, Muqolli F, Fang C, Cribbs DH, Fisher M, Choi B. Semi-automated protocol to quantify and characterize fluorescent three-dimensional vascular images. PLoS One 2024; 19:e0289109. [PMID: 38753706 PMCID: PMC11098357 DOI: 10.1371/journal.pone.0289109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 07/11/2023] [Indexed: 05/18/2024] Open
Abstract
The microvasculature facilitates gas exchange, provides nutrients to cells, and regulates blood flow in response to stimuli. Vascular abnormalities are an indicator of pathology for various conditions, such as compromised vessel integrity in small vessel disease and angiogenesis in tumors. Traditional immunohistochemistry enables the visualization of tissue cross-sections containing exogenously labeled vasculature. Although this approach can be utilized to quantify vascular changes within small fields of view, it is not a practical way to study the vasculature on the scale of whole organs. Three-dimensional (3D) imaging presents a more appropriate method to visualize the vascular architecture in tissue. Here we describe the complete protocol that we use to characterize the vasculature of different organs in mice encompassing the methods to fluorescently label vessels, optically clear tissue, collect 3D vascular images, and quantify these vascular images with a semi-automated approach. To validate the automated segmentation of vascular images, one user manually segmented one hundred random regions of interest across different vascular images. The automated segmentation results had an average sensitivity of 83±11% and an average specificity of 91±6% when compared to manual segmentation. Applying this procedure of image analysis presents a method to reliably quantify and characterize vascular networks in a timely fashion. This procedure is also applicable to other methods of tissue clearing and vascular labels that generate 3D images of microvasculature.
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Affiliation(s)
- Danny F. Xie
- Beckman Laser Institute and Medical Clinic, University of California-Irvine, Irvine, CA, United States of America
- Department of Biomedical Engineering, University of California-Irvine, Irvine, CA, United States of America
| | - Christian Crouzet
- Beckman Laser Institute and Medical Clinic, University of California-Irvine, Irvine, CA, United States of America
- Department of Biomedical Engineering, University of California-Irvine, Irvine, CA, United States of America
| | - Krystal LoPresti
- Beckman Laser Institute and Medical Clinic, University of California-Irvine, Irvine, CA, United States of America
- Department of Biomedical Engineering, University of California-Irvine, Irvine, CA, United States of America
| | - Yuke Wang
- Beckman Laser Institute and Medical Clinic, University of California-Irvine, Irvine, CA, United States of America
- Department of Biomedical Engineering, University of California-Irvine, Irvine, CA, United States of America
| | - Christopher Robinson
- Beckman Laser Institute and Medical Clinic, University of California-Irvine, Irvine, CA, United States of America
- Department of Biomedical Engineering, University of California-Irvine, Irvine, CA, United States of America
| | - William Jones
- Beckman Laser Institute and Medical Clinic, University of California-Irvine, Irvine, CA, United States of America
| | - Fjolla Muqolli
- Beckman Laser Institute and Medical Clinic, University of California-Irvine, Irvine, CA, United States of America
| | - Chuo Fang
- Department of Neurology, University of California-Irvine, Irvine, CA, United States of America
| | - David H. Cribbs
- Institute for Memory Impairments and Neurological Disorders, University of California-Irvine, Irvine, CA, United States of America
| | - Mark Fisher
- Beckman Laser Institute and Medical Clinic, University of California-Irvine, Irvine, CA, United States of America
- Department of Neurology, University of California-Irvine, Irvine, CA, United States of America
- Institute for Memory Impairments and Neurological Disorders, University of California-Irvine, Irvine, CA, United States of America
- Department of Pathology & Laboratory Medicine, University of California-Irvine, Irvine, CA, United States of America
| | - Bernard Choi
- Beckman Laser Institute and Medical Clinic, University of California-Irvine, Irvine, CA, United States of America
- Department of Biomedical Engineering, University of California-Irvine, Irvine, CA, United States of America
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4
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Werner S, Okenve-Ramos P, Hehlert P, Zitouni S, Priya P, Mendonça S, Sporbert A, Spalthoff C, Göpfert MC, Jana SC, Bettencourt-Dias M. IFT88 maintains sensory function by localising signalling proteins along Drosophila cilia. Life Sci Alliance 2024; 7:e202302289. [PMID: 38373798 PMCID: PMC10876440 DOI: 10.26508/lsa.202302289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/21/2024] Open
Abstract
Ciliary defects cause several ciliopathies, some of which have late onset, suggesting cilia are actively maintained. Still, we have a poor understanding of the mechanisms underlying their maintenance. Here, we show Drosophila melanogaster IFT88 (DmIFT88/nompB) continues to move along fully formed sensory cilia. We further identify Inactive, a TRPV channel subunit involved in Drosophila hearing and negative-gravitaxis behaviour, and a yet uncharacterised Drosophila Guanylyl Cyclase 2d (DmGucy2d/CG34357) as DmIFT88 cargoes. We also show DmIFT88 binding to the cyclase´s intracellular part, which is evolutionarily conserved and mutated in several degenerative retinal diseases, is important for the ciliary localisation of DmGucy2d. Finally, acute knockdown of both DmIFT88 and DmGucy2d in ciliated neurons of adult flies caused defects in the maintenance of cilium function, impairing hearing and negative-gravitaxis behaviour, but did not significantly affect ciliary ultrastructure. We conclude that the sensory ciliary function underlying hearing in the adult fly requires an active maintenance program which involves DmIFT88 and at least two of its signalling transmembrane cargoes, DmGucy2d and Inactive.
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Affiliation(s)
- Sascha Werner
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Pilar Okenve-Ramos
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
| | - Philip Hehlert
- Department of Cellular Neurobiology, University of Göttingen, Göttingen, Germany
| | - Sihem Zitouni
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Institut de Génétique Humaine (IGH), UMR, 9002 CNRS, Montpellier, France
| | - Pranjali Priya
- National Centre for Biological Sciences- TIFR, Bangalore, India
| | - Susana Mendonça
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - Anje Sporbert
- Advanced Light Microscopy, Max Delbrück Centrum for Molecular Medicine Berlin in the Helmholtz Association, Berlin, Germany
| | - Christian Spalthoff
- Department of Cellular Neurobiology, University of Göttingen, Göttingen, Germany
| | - Martin C Göpfert
- Department of Cellular Neurobiology, University of Göttingen, Göttingen, Germany
| | - Swadhin Chandra Jana
- https://ror.org/04b08hq31 Instituto Gulbenkian de Ciência, Oeiras, Portugal
- National Centre for Biological Sciences- TIFR, Bangalore, India
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5
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Brooks HL, de Castro Brás LE, Brunt KR, Sylvester MA, Parvatiyar MS, Sirish P, Bansal SS, Sule R, Eadie AL, Knepper MA, Fenton RA, Lindsey ML, DeLeon-Pennell KY, Gomes AV. Guidelines on antibody use in physiology research. Am J Physiol Renal Physiol 2024; 326:F511-F533. [PMID: 38234298 PMCID: PMC11208033 DOI: 10.1152/ajprenal.00347.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/08/2024] [Accepted: 01/08/2024] [Indexed: 01/19/2024] Open
Abstract
Antibodies are one of the most used reagents in scientific laboratories and are critical components for a multitude of experiments in physiology research. Over the past decade, concerns about many biological methods, including those that use antibodies, have arisen as several laboratories were unable to reproduce the scientific data obtained in other laboratories. The lack of reproducibility could be largely attributed to inadequate reporting of detailed methods, no or limited verification by authors, and the production and use of unvalidated antibodies. The goal of this guideline article is to review best practices concerning commonly used techniques involving antibodies, including immunoblotting, immunohistochemistry, and flow cytometry. Awareness and integration of best practices will increase the rigor and reproducibility of these techniques and elevate the quality of physiology research.
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Affiliation(s)
- Heddwen L Brooks
- Department of Physiology, Tulane University School of Medicine, New Orleans, Louisiana, United States
| | | | - Keith R Brunt
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Saint John, New Brunswick, Canada
| | - Megan A Sylvester
- Department of Physiology, College of Medicine, University of Arizona, Tucson, Arizona, United States
| | - Michelle S Parvatiyar
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, Florida, United States
| | - Padmini Sirish
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, California, United States
| | - Shyam S Bansal
- Department of Cellular and Molecular Physiology, Heart and Vascular Institute, Pennsylvania State University Hershey Medical Center, Hershey, Pennsylvania, United States
| | - Rasheed Sule
- Department of Neurobiology, Physiology and Behavior, University of California, Davis, California, United States
| | - Ashley L Eadie
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Saint John, New Brunswick, Canada
| | - Mark A Knepper
- Epithelial Systems Biology Laboratory, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States
| | - Robert A Fenton
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Merry L Lindsey
- School of Graduate Studies, Meharry Medical College, Nashville, Tennessee, United States
- Research Service, Nashville Veterans Affairs Medical Center, Nashville, Tennessee, United States
| | - Kristine Y DeLeon-Pennell
- Division of Cardiology, Department of Medicine, School of Medicine, Medical University of South Carolina, Charleston, South Carolina, United States
- Research Service, Ralph H Johnson Veterans Affairs Medical Center, Charleston, South Carolina, United States
| | - Aldrin V Gomes
- Department of Neurobiology, Physiology and Behavior, University of California, Davis, California, United States
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6
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Miklovič M, Gawryś O, Honetschlägerová Z, Kala P, Husková Z, Kikerlová S, Vaňourková Z, Jíchová Š, Kvasilová A, Kitamoto M, Maxová H, Puertas-Frias G, Mráček T, Sedmera D, Melenovský V. Renal denervation improves cardiac function independently of afterload and restores myocardial norepinephrine levels in a rodent heart failure model. Hypertens Res 2024:10.1038/s41440-024-01580-3. [PMID: 38302774 DOI: 10.1038/s41440-024-01580-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 12/04/2023] [Accepted: 12/24/2023] [Indexed: 02/03/2024]
Abstract
Renal nerves play a critical role in cardiorenal interactions. Renal denervation (RDN) improved survival in some experimental heart failure (HF) models. It is not known whether these favorable effects are indirect, explainable by a decrease in vascular afterload, or diminished neurohumoral response in the kidneys, or whether RDN procedure per se has direct myocardial effects in the failing heart. To elucidate mechanisms how RDN affects failing heart, we studied load-independent indexes of ventricular function, gene markers of myocardial remodeling, and cardiac sympathetic signaling in HF, induced by chronic volume overload (aorto-caval fistula, ACF) of Ren2 transgenic rats. Volume overload by ACF led to left ventricular (LV) hypertrophy and dysfunction, myocardial remodeling (upregulated Nppa, MYH 7/6 genes), increased renal and circulating norepinephrine (NE), reduced myocardial NE content, increased monoaminoxidase A (MAO-A), ROS production and decreased tyrosine hydroxylase (+) nerve staining. RDN in HF animals decreased congestion in the lungs and the liver, improved load-independent cardiac function (Ees, PRSW, Ees/Ea ratio), without affecting arterial elastance or LV pressure, reduced adverse myocardial remodeling (Myh 7/6, collagen I/III ratio), decreased myocardial MAO-A and inhibited renal neprilysin activity. RDN increased myocardial expression of acetylcholinesterase (Ache) and muscarinic receptors (Chrm2), decreased circulating and renal NE, but increased myocardial NE content, restoring so autonomic control of the heart. These changes likely explain improvements in survival after RDN in this model. The results suggest that RDN has remote, load-independent and favorable intrinsic myocardial effects in the failing heart. RDN therefore could be a useful therapeutic strategy in HF.
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Affiliation(s)
- Matúš Miklovič
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic
- Department of Pathophysiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Olga Gawryś
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic
| | - Zuzana Honetschlägerová
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic
| | - Petr Kala
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic
- Department of Cardiology, University Hospital Motol and 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Zuzana Husková
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic
| | - Soňa Kikerlová
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic
| | - Zdeňka Vaňourková
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic
| | - Šárka Jíchová
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic
| | - Alena Kvasilová
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Misuzu Kitamoto
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Hana Maxová
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic
- Department of Pathophysiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | | | - Tomáš Mráček
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - David Sedmera
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Vojtěch Melenovský
- Center for Experimental Medicine, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic.
- Department of Cardiology, Institute for Clinical and Experimental Medicine-IKEM, Prague, Czech Republic.
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7
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Olejnickova V, Hamor PU, Janacek J, Bartos M, Zabrodska E, Sankova B, Kvasilova A, Kolesova H, Sedmera D. Development of ventricular trabeculae affects electrical conduction in the early endothermic heart. Dev Dyn 2024; 253:78-90. [PMID: 36400745 DOI: 10.1002/dvdy.552] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 11/09/2022] [Accepted: 11/09/2022] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The ventricular trabeculae play a role, among others, in the impulse spreading in ectothermic hearts. Despite the morphological similarity with the early developing hearts of endotherms, this trabecular function in mammalian and avian embryos was poorly addressed. RESULTS We simulated impulse propagation inside the looping ventricle and revealed delayed apical activation in the heart with inhibited trabecular growth. This finding was corroborated by direct imaging of the endocardial surface showing early activation within the trabeculae implying preferential spreading of depolarization along with them. Targeting two crucial pathways of trabecular formation (Neuregulin/ErbB and Nkx2.5), we showed that trabecular development is also essential for proper conduction patterning. Persistence of the slow isotropic conduction likely contributed to the pumping failure in the trabeculae-deficient hearts. CONCLUSIONS Our results showed the essential role of trabeculae in intraventricular impulse spreading and conduction patterning in the early endothermic heart. Lack of trabeculae leads to the failure of conduction parameters differentiation resulting in primitive ventricular activation with consequent impact on the cardiac pumping function.
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Affiliation(s)
- Veronika Olejnickova
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
- Laboratory of Developmental Cardiology, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Peter Uriel Hamor
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Jiri Janacek
- Laboratory of Biomathematics, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Martin Bartos
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
- Department of Stomatology, General University Hospital in Prague, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Eva Zabrodska
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Barbora Sankova
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Alena Kvasilova
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Hana Kolesova
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
- Laboratory of Developmental Cardiology, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - David Sedmera
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
- Laboratory of Developmental Cardiology, Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
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8
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Pačes J, Knížková K, Tušková L, Grobárová V, Zadražil Z, Boes M, Černý J. MHC II - EGFP knock-in mouse model is a suitable tool for systems and quantitative immunology. Immunol Lett 2022; 251-252:75-85. [PMID: 36332824 DOI: 10.1016/j.imlet.2022.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 11/09/2022]
Abstract
Immunology is a rapidly evolving field of research with sophisticated models and methods. However, detailed data on total immune cell counts and population distributions remain surprisingly scarce. Nevertheless, recently established quantitative approaches could help us understand the overall complexity of the immune system. Here, we studied a major histocompatibility complexclass II - enhanced green fluorescent protein knock-in mouse model to precisely identify and manipulate lymphoid structures. By combining flow cytometry with light sheet microscopy, we quantified MHC II+ populations of the small intestine and associated individual mesenteric lymph nodes, with 36.7 × 106 cells in lamina propria, 3.0 × 105 cells in scattered lymphoid tissue and 1.1 × 106 cells in Peyer's patches. In addition to these whole-organ cell counts, we assessed approximately 1 × 106 total villi in the small intestine and 450 scattered lymphoid tissue follicles. By direct noninvasive microscopic observation of a naturally fully translucent mouse organ, the cornea, we quantified 12 ± 4 and 35 ± 7 cells/mm2 Langerhans- and macrophage-like populations, respectively. Ultimately, our findings show that flow cytometry with quantitative imaging data analysis enables us to avoid methodological discrepancies while gaining new insights into the relevance of organ-specific quantitative approaches for immunology.
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Affiliation(s)
- Jan Pačes
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Karolina Knížková
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Liliana Tušková
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Valéria Grobárová
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Zdeněk Zadražil
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Marianne Boes
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Jan Černý
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic.
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9
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Hsu CW, Cerda J, Kirk JM, Turner WD, Rasmussen TL, Flores Suarez CP, Dickinson ME, Wythe JD. EZ Clear for simple, rapid, and robust mouse whole organ clearing. eLife 2022; 11:e77419. [PMID: 36218247 PMCID: PMC9555867 DOI: 10.7554/elife.77419] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 09/22/2022] [Indexed: 11/13/2022] Open
Abstract
Tissue clearing for whole organ cell profiling has revolutionized biology and imaging for exploration of organs in three-dimensional space without compromising tissue architecture. But complicated, laborious procedures, or expensive equipment, as well as the use of hazardous, organic solvents prevent the widespread adoption of these methods. Here, we report a simple and rapid tissue clearing method, EZ Clear, that can clear whole adult mouse organs in 48 hr in just three simple steps. Samples stay at room temperature and remain hydrated throughout the clearing process, preserving endogenous and synthetic fluorescence, without altering sample size. After wholemount clearing and imaging, samples processed with EZ Clear can be subjected to downstream applications, such as tissue embedding and cryosectioning followed by standard histology or immunofluorescent staining without loss of fluorescence signal from endogenous or synthetic reporters. Furthermore, we demonstrate that wholemount adult mouse brains processed with EZ Clear can be successfully immunolabeled for fluorescent imaging while still retaining signal from endogenous fluorescent reporters. Overall, the simplicity, speed, and flexibility of EZ Clear make it easy to adapt and implement in diverse imaging modalities in biomedical research.
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Affiliation(s)
- Chih-Wei Hsu
- Department of Integrative Physiology, Baylor College of MedicineHoustonUnited States
- Optical Imaging and Vital Microscopy Core, Advance Technology Cores, Baylor College of MedicineHoustonUnited States
- Department of Education, Innovation and Technology, Baylor College of MedicineHoustonUnited States
- Cardiovascular Research Institute, Baylor College of MedicineHoustonUnited States
| | - Juan Cerda
- Department of Integrative Physiology, Baylor College of MedicineHoustonUnited States
| | - Jason M Kirk
- Optical Imaging and Vital Microscopy Core, Advance Technology Cores, Baylor College of MedicineHoustonUnited States
| | - Williamson D Turner
- Department of Integrative Physiology, Baylor College of MedicineHoustonUnited States
| | - Tara L Rasmussen
- Department of Integrative Physiology, Baylor College of MedicineHoustonUnited States
- Cardiovascular Research Institute, Baylor College of MedicineHoustonUnited States
| | | | - Mary E Dickinson
- Department of Integrative Physiology, Baylor College of MedicineHoustonUnited States
- Optical Imaging and Vital Microscopy Core, Advance Technology Cores, Baylor College of MedicineHoustonUnited States
- Cardiovascular Research Institute, Baylor College of MedicineHoustonUnited States
| | - Joshua D Wythe
- Department of Integrative Physiology, Baylor College of MedicineHoustonUnited States
- Cardiovascular Research Institute, Baylor College of MedicineHoustonUnited States
- Department of Neurosurgery, Baylor College of MedicineHoustonUnited States
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10
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Maselli D, Matos RS, Johnson RD, Martella D, Caprettini V, Chiappini C, Camelliti P, Campagnolo P. Porcine Organotypic Epicardial Slice Protocol: A Tool for the Study of Epicardium in Cardiovascular Research. Front Cardiovasc Med 2022; 9:920013. [PMID: 35924218 PMCID: PMC9339655 DOI: 10.3389/fcvm.2022.920013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 05/30/2022] [Indexed: 11/13/2022] Open
Abstract
The epicardium has recently gained interest in the cardiovascular field due to its capacity to support heart regeneration after ischemic injury. Models to study the epicardium of large animals in vitro are limited and mainly based on epicardial cell isolation/differentiation from stem cells, followed by 2D cells culture. In this method paper, we describe the procedure to obtain and culture 3D organotypic heart slices presenting an intact epicardium, as a novel model to study the epicardial physiology and activation. Epicardial slices are obtained from porcine hearts using a high-precision vibratome and retain a healthy epicardial layer embedded in its native extracellular environment and connected with other cardiac cells (cardiomyocytes, fibroblasts, vascular cells etc.). Epicardial slices can be cultured for 72 h, providing an ideal model for studying the epicardium physiology or perform pharmacological interventions/gene therapy approaches. We also report on methods to assesses the viability and composition of the epicardial slices, and evaluate their architecture in 3D through tissue decoloration. Finally, we present a potential application for a nanomaterial-based gene transfer method for tracking of epicardial cells within the slice. Crucially, given the similarity in morphology and physiology of porcine heart with its human counterpart, our system provides a platform for translational research while providing a clinically relevant and ethical alternative to the use of small animals in this type of research.
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Affiliation(s)
- Davide Maselli
- Cardiovascular Section, Department of Biochemical Sciences, University of Surrey, Guildford, United Kingdom
| | - Rolando S. Matos
- Cardiovascular Section, Department of Biochemical Sciences, University of Surrey, Guildford, United Kingdom
| | - Robert D. Johnson
- Cardiovascular Section, Department of Biochemical Sciences, University of Surrey, Guildford, United Kingdom
| | - Davide Martella
- London Centre for Nanotechnology, King's College London, London, United Kingdom
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Valeria Caprettini
- London Centre for Nanotechnology, King's College London, London, United Kingdom
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Ciro Chiappini
- London Centre for Nanotechnology, King's College London, London, United Kingdom
- Centre for Craniofacial and Regenerative Biology, King's College London, London, United Kingdom
| | - Patrizia Camelliti
- Cardiovascular Section, Department of Biochemical Sciences, University of Surrey, Guildford, United Kingdom
| | - Paola Campagnolo
- Cardiovascular Section, Department of Biochemical Sciences, University of Surrey, Guildford, United Kingdom
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11
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Toulemonde P, Risoud M, Lemesre P, Tardivel M, Siepmann J, Vincent C. 3D analysis of gerbil cochlea with cochlear implant. Eur Ann Otorhinolaryngol Head Neck Dis 2022; 139:333-336. [DOI: 10.1016/j.anorl.2022.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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12
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Brenna C, Simioni C, Varano G, Conti I, Costanzi E, Melloni M, Neri LM. Optical tissue clearing associated with 3D imaging: application in preclinical and clinical studies. Histochem Cell Biol 2022; 157:497-511. [PMID: 35235045 PMCID: PMC9114043 DOI: 10.1007/s00418-022-02081-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/28/2022] [Indexed: 12/23/2022]
Abstract
Understanding the inner morphology of intact tissues is one of the most competitive challenges in modern biology. Since the beginning of the twentieth century, optical tissue clearing (OTC) has provided solutions for volumetric imaging, allowing the microscopic visualization of thick sections of tissue, organoids, up to whole organs and organisms (for example, mouse or rat). Recently, tissue clearing has also been introduced in clinical settings to achieve a more accurate diagnosis with the support of 3D imaging. This review aims to give an overview of the most recent developments in OTC and 3D imaging and to illustrate their role in the field of medical diagnosis, with a specific focus on clinical applications.
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Affiliation(s)
- Cinzia Brenna
- Department of Translational Medicine, University of Ferrara, 44121, Ferrara, Italy.,Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Carolina Simioni
- Department of Life Sciences and Biotechnology, University of Ferrara, 44121, Ferrara, Italy.,LTTA - Electron Microscopy Center, University of Ferrara, 44121, Ferrara, Italy
| | - Gabriele Varano
- Department of Translational Medicine, University of Ferrara, 44121, Ferrara, Italy
| | - Ilaria Conti
- Department of Translational Medicine, University of Ferrara, 44121, Ferrara, Italy
| | - Eva Costanzi
- Department of Translational Medicine, University of Ferrara, 44121, Ferrara, Italy
| | - Mattia Melloni
- Department of Translational Medicine, University of Ferrara, 44121, Ferrara, Italy
| | - Luca Maria Neri
- Department of Translational Medicine, University of Ferrara, 44121, Ferrara, Italy. .,LTTA - Electron Microscopy Center, University of Ferrara, 44121, Ferrara, Italy.
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13
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Pichon J, Ledevin M, Larcher T, Jamme F, Rouger K, Dubreil L. Label-free 3D characterization of cardiac fibrosis in muscular dystrophy using SHG imaging of cleared tissue. Biol Cell 2021; 114:91-103. [PMID: 34964145 DOI: 10.1111/boc.202100056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 12/15/2021] [Accepted: 12/20/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND INFORMATION Duchenne muscular dystrophy (DMD) is a neuromuscular disease caused by mutations in the gene encoding dystrophin. It leads to repeated cycles of muscle fiber necrosis and regeneration and progressive replacement of fibers by fibrotic and adipose tissue, with consequent muscle weakness and premature death. Fibrosis and, in particular, collagen accumulation are important pathological features of dystrophic muscle. A better understanding of the development of fibrosis is crucial to enable better management of DMD. Three-dimensional (3D) characterization of collagen organization by second harmonic generation (SHG) microscopy has already proven a highly informative means of studying the fibrotic network in tissue. RESULTS Here, we combine for the first-time tissue clearing with SHG microscopy to characterize in depth the 3D cardiac fibrosis network from DMDmdx rat model. Heart sections (1-mm-thick) from 1-year-old wild-type (WT) and DMDmdx rats were cleared using the CUBIC protocol. SHG microscopy revealed significantly greater collagen deposition in DMDmdx versus WT sections. Analyses revealed a specific pattern of SHG+ segmented objects in DMDmdx cardiac muscle, characterized by a less elongated shape and increased density. Compared with the observed alignment of SHG+ collagen fibers in WT rats, profound fiber disorganization was observed in DMDmdx rats, in which we observed two distinct SHG+ collagen fiber profiles, which may reflect two distinct stages of the fibrotic process in DMD. CONCLUSION AND SIGNIFICANCE The current work highlights the interest to combine multiphoton SHG microscopy and tissue clearing for 3D fibrosis network characterization in label free organ. It could be a relevant tool to characterize the fibrotic tissue remodeling in relation to the disease progression and/or to evaluate the efficacy of therapeutic strategies in preclinical studies in DMD model or others fibrosis-related cardiomyopathies diseases. This article is protected by copyright. All rights reserved.
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Affiliation(s)
| | | | | | - Frédéric Jamme
- Synchrotron SOLEIL, l'Orme des Merisiers, Gif-sur-Yvette, F-91192, France
| | - Karl Rouger
- INRAE, Oniris, PAnTher, Nantes, F-44307, France
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14
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Kumegawa S, Yamada G, Hashimoto D, Hirashima T, Kajimoto M, Isono K, Fujimoto K, Suzuki K, Uemura K, Ema M, Asamura S. Development of Surgical and Visualization Procedures to Analyze Vasculatures by Mouse Tail Edema Model. Biol Proced Online 2021; 23:21. [PMID: 34758723 PMCID: PMC8582144 DOI: 10.1186/s12575-021-00159-3] [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: 08/17/2021] [Accepted: 10/26/2021] [Indexed: 12/02/2022] Open
Abstract
Background Because of the high frequency of chronic edema formation in the current “aged” society, analyses and detailed observation of post-surgical edema are getting more required. Post-surgical examination of the dynamic vasculature including L.V. (Lymphatic Vasculature) to monitor edema formation has not been efficiently performed. Hence, procedures for investigating such vasculature are essential. By inserting transparent sheet into the cutaneous layer of mouse tails as a novel surgery model (theTailEdema bySilicone sheet mediatedTransparency protocol; TEST), the novel procedures are introduced and analyzed by series of histological analyses including video-based L.V. observation and 3D histological reconstruction of vasculatures in mouse tails. Results The dynamic generation of post-surgical main and fine (neo) L.V. connective structure during the edematous recovery process was visualized by series of studies with a novel surgery model. Snapshot images taken from live binocular image recording for TEST samples suggested the presence of main and elongating fine (neo) L.V. structure. After the ligation of L.V., the enlargement of main L.V. was confirmed. In the case of light sheet fluorescence microscopy (LSFM) observation, such L.V. connections were also suggested by using transparent 3D samples. Finally, the generation of neo blood vessels particularly in the region adjacent to the silicone sheet and the operated boundary region was suggested in 3D reconstruction images. However, direct detection of elongating fine (neo) L.V. was not suitable for analysis by such LSFM and 3D reconstruction procedures. Thus, such methods utilizing fixed tissues are appropriate for general observation for the operated region including of L.V. Conclusions The current surgical procedures and analysis on the post-surgical status are the first case to observe vasculatures in vivo with a transparent sheet. Systematic analyses including the FITC-dextran mediated snap shot images observation suggest the elongation of fine (neo) lymphatic vasculature. Post-surgical analyses including LSFM and 3D histological structural reconstruction, are suitable to reveal the fixed structures of blood and lymphatic vessels formation. Supplementary Information The online version contains supplementary material available at 10.1186/s12575-021-00159-3.
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Affiliation(s)
- Shinji Kumegawa
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Medical University of Wakayama, Wakayama, Japan
| | - Gen Yamada
- Department of Developmental Genetics, Institute of Advanced Medicine, Medical University of Wakayama, Wakayama, Japan.
| | - Daiki Hashimoto
- Department of molecular Physiology, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan
| | - Tsuyoshi Hirashima
- The Hakubi Center/Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Mizuki Kajimoto
- Department of Developmental Genetics, Institute of Advanced Medicine, Medical University of Wakayama, Wakayama, Japan
| | - Kyoichi Isono
- Laboratory Animal Center, Wakayama Medical University, Wakayama, Japan
| | - Kota Fujimoto
- Department of Developmental Genetics, Institute of Advanced Medicine, Medical University of Wakayama, Wakayama, Japan
| | - Kentaro Suzuki
- Department of Developmental Genetics, Institute of Advanced Medicine, Medical University of Wakayama, Wakayama, Japan
| | - Kazuhisa Uemura
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Medical University of Wakayama, Wakayama, Japan
| | - Masatsugu Ema
- Department of Stem Cells and Human Diseases Models, Research Center for Animal Life Science, Medical University of Shiga, Otsu, Shiga, Japan
| | - Shinichi Asamura
- Department of Plastic and Reconstructive Surgery, Graduate School of Medicine, Medical University of Wakayama, Wakayama, Japan
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15
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Yuan YS, Yu F, Niu SP, Lu H, Kou YH, Xu HL. Combining CUBIC Optical Clearing and Thy1-YFP-16 Mice to Observe Morphological Axon Changes During Wallerian Degeneration. Curr Med Sci 2021; 41:944-952. [PMID: 34693494 DOI: 10.1007/s11596-021-2438-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 12/26/2020] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Wallerian degeneration is a pathological process closely related to peripheral nerve regeneration following injury, and includes the disintegration and phagocytosis of peripheral nervous system cells. Traditionally, morphological changes are observed by performing immunofluorescence staining after sectioning, which results in the loss of some histological information. The purpose of this study was to explore a new, nondestructive, and systematic method for observing axonal histological changes during Wallerian degeneration. METHODS Thirty male Thy1-YFP-16 mice (SPF grade, 6 weeks old, 20±5 g) were randomly selected and divided into clear, unobstructed brain imaging cocktails and computational analysis (CUBIC) optical clearing (n=15) and traditional method groups (n=15). Five mice in each group were sacrificed at 1st, 3rd, and 5th day following a crush operation. The histological axon changes were observed by CUBIC light optical clearing treatment, direct tissue section imaging, and HE staining. RESULTS The results revealed that, compared with traditional imaging methods, there was no physical damage to the samples, which allowed for three-dimensional and deep-seated tissue imaging through CUBIC. Local image information could be nicely obtained by direct fluorescence imaging and HE staining, but it was difficult to obtain image information of the entire sample. At the same time, the image information obtained by fluorescence imaging and HE staining was partially lost. CONCLUSION The combining of CUBIC and Thy1-YFP transgenic mice allowed for a clear and comprehensive observation of histological changes of axons in Wallerian degeneration.
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Affiliation(s)
- Yu-Song Yuan
- Department of Trauma and Orthopaedics, Peking University People's Hospital, Peking University, Beijing, 100044, China
- National and Local Joint Engineering Research Center of Orthopaedic Biomaterials, Department of Bone & Joint Surgery, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Fei Yu
- Department of Trauma and Orthopaedics, Peking University People's Hospital, Peking University, Beijing, 100044, China
- National and Local Joint Engineering Research Center of Orthopaedic Biomaterials, Department of Bone & Joint Surgery, Peking University Shenzhen Hospital, Shenzhen, 518036, China
| | - Su-Ping Niu
- Office of Academic Research, Peking University People's Hospital, Peking University, Beijing, 100044, China
| | - Hao Lu
- Department of Trauma and Orthopaedics, Peking University People's Hospital, Peking University, Beijing, 100044, China
- Diabetic Foot Treatment Center, Peking University People's Hospital, Peking University, Beijing, 100044, China
| | - Yu-Hui Kou
- Department of Trauma and Orthopaedics, Peking University People's Hospital, Peking University, Beijing, 100044, China.
- Key Laboratory of Trauma and Neural Regeneration (Peking University), Ministry of Education, Beijing, 100044, China.
| | - Hai-Lin Xu
- Department of Trauma and Orthopaedics, Peking University People's Hospital, Peking University, Beijing, 100044, China.
- Diabetic Foot Treatment Center, Peking University People's Hospital, Peking University, Beijing, 100044, China.
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16
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Kirschnick N, Drees D, Redder E, Erapaneedi R, Pereira da Graca A, Schäfers M, Jiang X, Kiefer F. Rapid methods for the evaluation of fluorescent reporters in tissue clearing and the segmentation of large vascular structures. iScience 2021; 24:102650. [PMID: 34151237 PMCID: PMC8192726 DOI: 10.1016/j.isci.2021.102650] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 04/23/2021] [Accepted: 05/24/2021] [Indexed: 12/14/2022] Open
Abstract
Light sheet fluorescence microscopy (LSFM) of large tissue samples does not require mechanical sectioning and allows efficient visualization of spatially complex or rare structures. Therefore, LSFM has become invaluable in developmental and biomedical research. Because sample size may limit whole-mount staining, LSFM benefits from transgenic reporter organisms expressing fluorescent proteins (FPs) and, however, requires optical clearing and computational data visualization and analysis. The former often interferes with FPs, while the latter requires massive computing resources. Here, we describe 3D-polymerized cell dispersions, a rapid and straightforward method, based on recombinant FP expression in freely selectable tester cells, to evaluate and compare fluorescence retention in different tissue-clearing protocols. For the analysis of large LSFM data, which usually requires huge computing resources, we introduce a refined, interactive, hierarchical random walker approach that is capable of efficient segmentation of the vasculature in data sets even on a consumer grade PC.
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Affiliation(s)
- Nils Kirschnick
- European Institute of Molecular Imaging, University of Münster, Waldeyerstraße 15, 48149 Münster, Germany
| | - Dominik Drees
- Institute of Computer Science, University of Münster, Einsteinstraße 62, 48149 Münster, Germany
| | - Esther Redder
- European Institute of Molecular Imaging, University of Münster, Waldeyerstraße 15, 48149 Münster, Germany
| | - Raghu Erapaneedi
- European Institute of Molecular Imaging, University of Münster, Waldeyerstraße 15, 48149 Münster, Germany
| | - Abel Pereira da Graca
- European Institute of Molecular Imaging, University of Münster, Waldeyerstraße 15, 48149 Münster, Germany
| | - Michael Schäfers
- European Institute of Molecular Imaging, University of Münster, Waldeyerstraße 15, 48149 Münster, Germany
| | - Xiaoyi Jiang
- Institute of Computer Science, University of Münster, Einsteinstraße 62, 48149 Münster, Germany
| | - Friedemann Kiefer
- European Institute of Molecular Imaging, University of Münster, Waldeyerstraße 15, 48149 Münster, Germany
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17
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Carias AM, Schneider JR, Madden P, Lorenzo-Redondo R, Araínga M, Pegu A, Cianci GC, Maric D, Villinger F, Mascola JR, Veazey RS, Hope TJ. Anatomic Distribution of Intravenously Injected IgG Takes Approximately 1 Week to Achieve Stratum Corneum Saturation in Vaginal Tissues. THE JOURNAL OF IMMUNOLOGY 2021; 207:505-511. [PMID: 34162723 DOI: 10.4049/jimmunol.2100253] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 05/16/2021] [Indexed: 01/13/2023]
Abstract
i.v. injected Abs have demonstrated protection against simian HIV infection in rhesus macaques, paving the way for the Antibody Mediated Prevention trial in which at-risk individuals for HIV received an i.v. infusion of the HIV broadly neutralizing Ab VRC01. However, the time needed for these Abs to fully distribute and elicit protection at mucosal sites is still unknown. In this study, we interrogate how long it takes for Abs to achieve peak anatomical levels at the vaginal surface following i.v. injection. Fluorescently labeled VRC01 and/or Gamunex-C were i.v. injected into 24 female rhesus macaques (Macaca mulatta) with vaginal tissues and plasma acquired up to 2 wk postinjection. We found that Ab delivery to the vaginal mucosa occurs in two phases. The first phase involves delivery to the submucosa, occurring within 24 h and persisting beyond 1 wk. The second phase is the delivery through the stratified squamous epithelium, needing ∼1 wk to saturate the stratum corneum. This study has important implications for the efficacy of immunoprophylaxis targeting pathogens at the mucosa.
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Affiliation(s)
- Ann M Carias
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Jeffrey R Schneider
- Department of Microbial Pathogens and Immunity, Rush University Medical Center, Chicago, IL
| | - Patrick Madden
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Ramon Lorenzo-Redondo
- Division of Infectious Diseases, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Mariluz Araínga
- New Iberia Research Center, University of Louisiana at Lafayette, Lafayette, LA
| | - Amarendra Pegu
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD; and
| | - Gianguido C Cianci
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Danijela Maric
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL
| | - Francois Villinger
- New Iberia Research Center, University of Louisiana at Lafayette, Lafayette, LA
| | - John R Mascola
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD; and
| | - Ronald S Veazey
- National Primate Research Center, Tulane University School of Medicine, Covington, LA
| | - Thomas J Hope
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL;
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18
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Development of an Optimized Clearing Protocol to Examine Adipocyte Subpopulations in White Adipose Tissue. Methods Protoc 2021; 4:mps4020039. [PMID: 34199437 PMCID: PMC8293430 DOI: 10.3390/mps4020039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 01/16/2023] Open
Abstract
Organic solvent dibenzyl ether (DBE)-based protocols have been widely used in adipose tissue clearing. However, benzyl alcohol/benzyl benzoate (BABB)-based clearing has been shown to offer better transparency in other tissues. The addition of diphenyl ether (DPE) to BABB (BABB-D4) is often included to preserve fluorescent signals, but its effects on adipose tissue transparency and shrinkage have not been explored. Distinct adipocyte subpopulations contribute to its cellular composition and biological activity. Here, we compared clearing solvents to create an optimized clearing methodology for the study of adipocyte subpopulations. Adipose tissues were cleared with BABB, BABB-D4, and DBE, and post-clearing transparency and tissue shrinkage were measured. An optimized protocol, including BABB-D4 clearing, delipidation, and extensive immunofluorescence blocking steps, was created to examine the spatial distribution of Wt-1 positive progenitor-derived (Type-1) adipocytes in intact mesenteric fat. Both BABB and BABB-D4 lead to significantly increased tissue transparency with reduced tissue shrinkage compared to DBE-cleared adipose tissue. Type-1 adipocytes are found in a clustered distribution with predominant residence in fat associated with the ileum and colon. This paper details an optimized clearing methodology for adipose tissue with increased tissue transparency and reduced shrinkage, and therefore will be a useful tool for investigating adipose tissue biology.
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19
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Kolesová H, Olejníčková V, Kvasilová A, Gregorovičová M, Sedmera D. Tissue clearing and imaging methods for cardiovascular development. iScience 2021; 24:102387. [PMID: 33981974 PMCID: PMC8086021 DOI: 10.1016/j.isci.2021.102387] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Tissue imaging in 3D using visible light is limited and various clearing techniques were developed to increase imaging depth, but none provides universal solution for all tissues at all developmental stages. In this review, we focus on different tissue clearing methods for 3D imaging of heart and vasculature, based on chemical composition (solvent-based, simple immersion, hyperhydration, and hydrogel embedding techniques). We discuss in detail compatibility of various tissue clearing techniques with visualization methods: fluorescence preservation, immunohistochemistry, nuclear staining, and fluorescent dyes vascular perfusion. We also discuss myocardium visualization using autofluorescence, tissue shrinking, and expansion. Then we overview imaging methods used to study cardiovascular system and live imaging. We discuss heart and vessels segmentation methods and image analysis. The review covers the whole process of cardiovascular system 3D imaging, starting from tissue clearing and its compatibility with various visualization methods to the types of imaging methods and resulting image analysis.
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Affiliation(s)
- Hana Kolesová
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
- Institute of Physiology, Czech Academy of Science, Prague, Czech Republic
| | - Veronika Olejníčková
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
- Institute of Physiology, Czech Academy of Science, Prague, Czech Republic
| | - Alena Kvasilová
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Martina Gregorovičová
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
- Institute of Physiology, Czech Academy of Science, Prague, Czech Republic
| | - David Sedmera
- Institute of Anatomy, First Faculty of Medicine, Charles University, Prague, Czech Republic
- Institute of Physiology, Czech Academy of Science, Prague, Czech Republic
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20
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Zhang S, Chang Q, Li P, Tong X, Feng Y, Hao X, Zhang X, Yuan Z, Tan J. Concentrated small extracellular vesicles from menstrual blood-derived stromal cells improve intrauterine adhesion, a pre-clinical study in a rat model. NANOSCALE 2021; 13:7334-7347. [PMID: 33889891 DOI: 10.1039/d0nr08942g] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We previously reported that transplantation of menstrual blood-derived stromal cells (MenSCs) significantly improved fertility restoration in intrauterine adhesion (IUA). However, it is difficult to obtain menstrual blood samples in some severe IUA patients who have amenorrhea or oligomenorrhea. Thus, a safe and effective stem cell replacement therapy is necessary to promote endometrial regeneration. Recent studies demonstrated that the effects of MenSCs are partly mediated in a paracrine manner via small extracellular vesicles (sEVs). To explore this possibility, we performed a pre-clinical study to investigate whether concentrated MenSC-derived sEVs (MenSCs-sEVs) are sufficient to repair IUA and the mechanisms underlying their action. Rat IUA models were established by mechanical injury, followed by the administration of MenSCs or MenSCs-sEVs through intrauterine transplantation. Consistent with the efficacy of MenSCs, MenSCs-sEVs effectively recovered the morphology, promoted regeneration of the glands and angiogenesis, and reversed endometrial fibrosis in the IUA uterus. The endometrial receptivity and pregnancy outcome significantly improved after repeated MenSCs-sEVs transplantations. In addition, all rats in the MenSCs-sEVs group had no hematological or biochemical abnormalities. Three-dimensional fluorescence imaging suggested that MenSCs tended to migrate through the bloodstream, whereas MenSCs-sEVs had a better localized therapeutic effect. Moreover, MenSCs and MenSCs-sEVs inhibited the TGFβ1/SMAD3 pathway in the IUA endometrium, while promoting the phosphorylation of SMAD1/5/8 and ERK 1/2 and upregulating the expression of BMP7. Thus, MenSCs-sEVs safely and effectively enhanced endometrial restoration, suggesting a promising non-cellular therapy for endometrial regeneration and a key role in MenSC-mediated IUA treatment.
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Affiliation(s)
- Siwen Zhang
- Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang 110022, China.
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21
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Lapierre-Landry M, Liu Z, Ling S, Bayat M, Wilson DL, Jenkins MW. Nuclei Detection for 3D Microscopy With a Fully Convolutional Regression Network. IEEE ACCESS : PRACTICAL INNOVATIONS, OPEN SOLUTIONS 2021; 9:60396-60408. [PMID: 35024261 PMCID: PMC8751907 DOI: 10.1109/access.2021.3073894] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Advances in three-dimensional microscopy and tissue clearing are enabling whole-organ imaging with single-cell resolution. Fast and reliable image processing tools are needed to analyze the resulting image volumes, including automated cell detection, cell counting and cell analytics. Deep learning approaches have shown promising results in two- and three-dimensional nuclei detection tasks, however detecting overlapping or non-spherical nuclei of different sizes and shapes in the presence of a blurring point spread function remains challenging and often leads to incorrect nuclei merging and splitting. Here we present a new regression-based fully convolutional network that located a thousand nuclei centroids with high accuracy in under a minute when combined with V-net, a popular three-dimensional semantic-segmentation architecture. High nuclei detection F1-scores of 95.3% and 92.5% were obtained in two different whole quail embryonic hearts, a tissue type difficult to segment because of its high cell density, and heterogeneous and elliptical nuclei. Similar high scores were obtained in the mouse brain stem, demonstrating that this approach is highly transferable to nuclei of different shapes and intensities. Finally, spatial statistics were performed on the resulting centroids. The spatial distribution of nuclei obtained by our approach most resembles the spatial distribution of manually identified nuclei, indicating that this approach could serve in future spatial analyses of cell organization.
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Affiliation(s)
- Maryse Lapierre-Landry
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Zexuan Liu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Shan Ling
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Mahdi Bayat
- Department of Electrical Engineering and Computer Science, Case Western Reserve University, Cleveland, OH 44106, USA
| | - David L Wilson
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
- Department of Radiology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Michael W Jenkins
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH 44106, USA
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22
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Nowzari F, Wang H, Khoradmehr A, Baghban M, Baghban N, Arandian A, Muhaddesi M, Nabipour I, Zibaii MI, Najarasl M, Taheri P, Latifi H, Tamadon A. Three-Dimensional Imaging in Stem Cell-Based Researches. Front Vet Sci 2021; 8:657525. [PMID: 33937378 PMCID: PMC8079735 DOI: 10.3389/fvets.2021.657525] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 03/19/2021] [Indexed: 12/14/2022] Open
Abstract
Stem cells have an important role in regenerative therapies, developmental biology studies and drug screening. Basic and translational research in stem cell technology needs more detailed imaging techniques. The possibility of cell-based therapeutic strategies has been validated in the stem cell field over recent years, a more detailed characterization of the properties of stem cells is needed for connectomics of large assemblies and structural analyses of these cells. The aim of stem cell imaging is the characterization of differentiation state, cellular function, purity and cell location. Recent progress in stem cell imaging field has included ultrasound-based technique to study living stem cells and florescence microscopy-based technique to investigate stem cell three-dimensional (3D) structures. Here, we summarized the fundamental characteristics of stem cells via 3D imaging methods and also discussed the emerging literatures on 3D imaging in stem cell research and the applications of both classical 2D imaging techniques and 3D methods on stem cells biology.
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Affiliation(s)
- Fariborz Nowzari
- The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Huimei Wang
- Department of Integrative Medicine and Neurobiology, School of Basic Medical Sciences, Institute of Acupuncture and Moxibustion, Fudan Institutes of Integrative Medicine, Fudan University, Shanghai, China
| | - Arezoo Khoradmehr
- The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Mandana Baghban
- Department of Obstetrics and Gynecology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Neda Baghban
- The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Alireza Arandian
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Mahdi Muhaddesi
- The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Iraj Nabipour
- The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Mohammad I. Zibaii
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Mostafa Najarasl
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Payam Taheri
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
| | - Hamid Latifi
- Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
- Department of Physics, Shahid Beheshti University, Tehran, Iran
| | - Amin Tamadon
- The Persian Gulf Marine Biotechnology Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
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23
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Investigation of PRDM10 and PRDM13 Expression in Developing Mouse Embryos by an Optimized PACT-Based Embryo Clearing Method. Int J Mol Sci 2021; 22:ijms22062892. [PMID: 33809237 PMCID: PMC8000312 DOI: 10.3390/ijms22062892] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/25/2021] [Accepted: 03/08/2021] [Indexed: 12/21/2022] Open
Abstract
Recent developments in tissue clearing methods have significantly advanced the three-dimensional analysis of biological structures in whole, intact tissue, providing a greater understanding of spatial relationships and biological circuits. Nonetheless, studies have reported issues with maintaining structural integrity and preventing tissue disintegration, limiting the wide application of these techniques to fragile tissues such as developing embryos. Here, we present an optimized passive tissue clearing technique (PACT)-based embryo clearing method, initial embedding PACT (IMPACT)-Basic, that improves tissue rigidity without compromising optical transparency. We also present IMPACT-Advance, which is specifically optimized for thin slices of mouse embryos past E13.5. We demonstrate proof-of-concept by investigating the expression of two relatively understudied PR domain (PRDM) proteins, PRDM10 and PRDM13, in intact cleared mouse embryos at various stages of development. We observed strong PRDM10 and PRDM13 expression in the developing nervous system and skeletal cartilage, suggesting a functional role for these proteins in these tissues throughout embryogenesis.
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24
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Avilov SV. Navigating across multi-dimensional space of tissue clearing parameters. Methods Appl Fluoresc 2021; 9:022001. [PMID: 33592593 DOI: 10.1088/2050-6120/abe6fb] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Optical tissue clearing refers to physico-chemical treatments which make thick biological samples transparent by removal of refractive index gradients and light absorbing substances. Although tissue clearing was first reported in 1914, it was not widely used in light microscopy until 21th century, because instrumentation of that time did not permit to acquire and handle images of thick (mm to cm) samples as whole. Rapid progress in optical instrumentation, computers and software over the last decades made micrograph acquisition of centimeter-thick samples feasible. This boosted tissue clearing use and development. Numerous diverse protocols have been developed. They use organic solvents or water-miscible substances, such as detergents and chaotropic agents; some protocols require application of electric field or perfusion with special devices. There is no 'best-for-all' tissue clearing method. Depending on the case, one or another protocol is more suitable. Most of protocols require days or even weeks to complete, thus choosing an unsuitable protocol may cause an important waste of time. Several inter-dependent parameters should be taken into account to choose a tissue clearing protocol, such as: (1) required image quality (resolution, contrast, signal to noise ratio etc), (2) nature and size of the sample, (3) type of labels, (4) characteristics of the available instrumentation, (5) budget, (6) time budget, and (7) feasibility. Present review focusses on the practical aspects of various tissue clearing techniques. It is aimed to help non-experts to choose tissue clearing techniques which are optimal for their particular cases.
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Affiliation(s)
- Sergiy V Avilov
- Max Planck Institute of Immunobiology and Epigenetics, Freiburg, Germany
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25
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Olejnickova V, Kocka M, Kvasilova A, Kolesova H, Dziacky A, Gidor T, Gidor L, Sankova B, Gregorovicova M, Gourdie RG, Sedmera D. Gap Junctional Communication via Connexin43 between Purkinje Fibers and Working Myocytes Explains the Epicardial Activation Pattern in the Postnatal Mouse Left Ventricle. Int J Mol Sci 2021; 22:2475. [PMID: 33804428 PMCID: PMC7957598 DOI: 10.3390/ijms22052475] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/19/2021] [Accepted: 02/25/2021] [Indexed: 12/31/2022] Open
Abstract
The mammalian ventricular myocardium forms a functional syncytium due to flow of electrical current mediated in part by gap junctions localized within intercalated disks. The connexin (Cx) subunit of gap junctions have direct and indirect roles in conduction of electrical impulse from the cardiac pacemaker via the cardiac conduction system (CCS) to working myocytes. Cx43 is the dominant isoform in these channels. We have studied the distribution of Cx43 junctions between the CCS and working myocytes in a transgenic mouse model, which had the His-Purkinje portion of the CCS labeled with green fluorescence protein. The highest number of such connections was found in a region about one-third of ventricular length above the apex, and it correlated with the peak proportion of Purkinje fibers (PFs) to the ventricular myocardium. At this location, on the septal surface of the left ventricle, the insulated left bundle branch split into the uninsulated network of PFs that continued to the free wall anteriorly and posteriorly. The second peak of PF abundance was present in the ventricular apex. Epicardial activation maps correspondingly placed the site of the first activation in the apical region, while some hearts presented more highly located breakthrough sites. Taken together, these results increase our understanding of the physiological pattern of ventricular activation and its morphological underpinning through detailed CCS anatomy and distribution of its gap junctional coupling to the working myocardium.
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Affiliation(s)
- Veronika Olejnickova
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
- Institute of Physiology, CAS, 142 20 Prague, Czech Republic
| | - Matej Kocka
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
| | - Alena Kvasilova
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
| | - Hana Kolesova
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
- Institute of Physiology, CAS, 142 20 Prague, Czech Republic
| | - Adam Dziacky
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
- Department of Pediatric Cardiology, Motol University Hospital, 150 06 Prague, Czech Republic
| | - Tom Gidor
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
| | - Lihi Gidor
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
| | - Barbora Sankova
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
| | - Martina Gregorovicova
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
- Institute of Physiology, CAS, 142 20 Prague, Czech Republic
| | - Robert G. Gourdie
- Fralin Biomedical Research Institute, Virginia Tech, Roanoke, VA 24016, USA;
| | - David Sedmera
- Institute of Anatomy, First Faculty of Medicine, Charles University, 128 00 Prague, Czech Republic; (V.O.); (M.K.); (A.K.); (H.K.); (A.D.); (T.G.); (L.G.); (B.S.); (M.G.)
- Institute of Physiology, CAS, 142 20 Prague, Czech Republic
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26
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Young DM, Fazel Darbandi S, Schwartz G, Bonzell Z, Yuruk D, Nojima M, Gole LC, Rubenstein JL, Yu W, Sanders SJ. Constructing and optimizing 3D atlases from 2D data with application to the developing mouse brain. eLife 2021; 10:61408. [PMID: 33570495 PMCID: PMC7994002 DOI: 10.7554/elife.61408] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 02/10/2021] [Indexed: 12/17/2022] Open
Abstract
3D imaging data necessitate 3D reference atlases for accurate quantitative interpretation. Existing computational methods to generate 3D atlases from 2D-derived atlases result in extensive artifacts, while manual curation approaches are labor-intensive. We present a computational approach for 3D atlas construction that substantially reduces artifacts by identifying anatomical boundaries in the underlying imaging data and using these to guide 3D transformation. Anatomical boundaries also allow extension of atlases to complete edge regions. Applying these methods to the eight developmental stages in the Allen Developing Mouse Brain Atlas (ADMBA) led to more comprehensive and accurate atlases. We generated imaging data from 15 whole mouse brains to validate atlas performance and observed qualitative and quantitative improvement (37% greater alignment between atlas and anatomical boundaries). We provide the pipeline as the MagellanMapper software and the eight 3D reconstructed ADMBA atlases. These resources facilitate whole-organ quantitative analysis between samples and across development. The research community needs precise, reliable 3D atlases of organs to pinpoint where biological structures and processes are located. For instance, these maps are essential to understand where specific genes are turned on or off, or the spatial organization of various groups of cells over time. For centuries, atlases have been built by thinly ‘slicing up’ an organ, and then precisely representing each 2D layer. Yet this approach is imperfect: each layer may be accurate on its own, but inevitable mismatches appear between the slices when viewed in 3D or from another angle. Advances in microscopy now allow entire organs to be imaged in 3D. Comparing these images with atlases could help to detect subtle differences that indicate or underlie disease. However, this is only possible if 3D maps are accurate and do not feature mismatches between layers. To create an atlas without such artifacts, one approach consists in starting from scratch and manually redrawing the maps in 3D, a labor-intensive method that discards a large body of well-established atlases. Instead, Young et al. set out to create an automated method which could help to refine existing ‘layer-based’ atlases, releasing software that anyone can use to improve current maps. The package was created by harnessing eight atlases in the Allen Developing Mouse Brain Atlas, and then using the underlying anatomical images to resolve discrepancies between layers or fill out any missing areas. Known as MagellanMapper, the software was extensively tested to demonstrate the accuracy of the maps it creates, including comparison to whole-brain imaging data from 15 mouse brains. Armed with this new software, researchers can improve the accuracy of their atlases, helping them to understand the structure of organs at the level of the cell and giving them insight into a broad range of human disorders.
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Affiliation(s)
- David M Young
- Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, United States.,Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - Siavash Fazel Darbandi
- Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, United States
| | - Grace Schwartz
- Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, United States
| | - Zachary Bonzell
- Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, United States
| | - Deniz Yuruk
- Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, United States
| | - Mai Nojima
- Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, United States
| | - Laurent C Gole
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - John Lr Rubenstein
- Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, United States
| | - Weimiao Yu
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - Stephan J Sanders
- Department of Psychiatry and Behavioral Sciences, UCSF Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, United States
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27
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Diosdi A, Hirling D, Kovacs M, Toth T, Harmati M, Koos K, Buzas K, Piccinini F, Horvath P. A quantitative metric for the comparative evaluation of optical clearing protocols for 3D multicellular spheroids. Comput Struct Biotechnol J 2021; 19:1233-1243. [PMID: 33717421 PMCID: PMC7907228 DOI: 10.1016/j.csbj.2021.01.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 01/19/2021] [Accepted: 01/23/2021] [Indexed: 12/18/2022] Open
Abstract
3D multicellular spheroids quickly emerged as in vitro models because they represent the in vivo tumor environment better than standard 2D cell cultures. However, with current microscopy technologies, it is difficult to visualize individual cells in the deeper layers of 3D samples mainly because of limited light penetration and scattering. To overcome this problem several optical clearing methods have been proposed but defining the most appropriate clearing approach is an open issue due to the lack of a gold standard metric. Here, we propose a guideline for 3D light microscopy imaging to achieve single-cell resolution. The guideline includes a validation experiment focusing on five optical clearing protocols. We review and compare seven quality metrics which quantitatively characterize the imaging quality of spheroids. As a test environment, we have created and shared a large 3D dataset including approximately hundred fluorescently stained and optically cleared spheroids. Based on the results we introduce the use of a novel quality metric as a promising method to serve as a gold standard, applicable to compare optical clearing protocols, and decide on the most suitable one for a particular experiment.
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Affiliation(s)
- Akos Diosdi
- Synthetic and Systems Biology Unit, Biological Research Centre (BRC), H-6726 Szeged, Hungary
- Doctoral School of Biology, University of Szeged, H-6726 Szeged, Hungary
| | - Dominik Hirling
- Synthetic and Systems Biology Unit, Biological Research Centre (BRC), H-6726 Szeged, Hungary
- Doctoral School of Computer Science, University of Szeged, H-6701 Szeged, Hungary
| | - Maria Kovacs
- Synthetic and Systems Biology Unit, Biological Research Centre (BRC), H-6726 Szeged, Hungary
| | - Timea Toth
- Synthetic and Systems Biology Unit, Biological Research Centre (BRC), H-6726 Szeged, Hungary
- Doctoral School of Biology, University of Szeged, H-6726 Szeged, Hungary
| | - Maria Harmati
- Synthetic and Systems Biology Unit, Biological Research Centre (BRC), H-6726 Szeged, Hungary
| | - Krisztian Koos
- Synthetic and Systems Biology Unit, Biological Research Centre (BRC), H-6726 Szeged, Hungary
| | - Krisztina Buzas
- Synthetic and Systems Biology Unit, Biological Research Centre (BRC), H-6726 Szeged, Hungary
- Department of Immunology, Faculty of Medicine, Faculty of Science and Informatics, University of Szeged, H-6720 Szeged, Hungary
| | - Filippo Piccinini
- IRCCS Istituto Romagnolo per lo Studio dei Tumori (IRST) “Dino Amadori”, Via Piero Maroncelli 40, I-47014 Meldola, FC, Italy
| | - Peter Horvath
- Synthetic and Systems Biology Unit, Biological Research Centre (BRC), H-6726 Szeged, Hungary
- Institute for Molecular Medicine Finland, University of Helsinki, FI-00014 Helsinki, Finland
- Single-Cell Technologies Ltd., H-6726 Szeged, Hungary
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28
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González-Hernández S, Gómez MJ, Sánchez-Cabo F, Méndez-Ferrer S, Muñoz-Cánoves P, Isern J. Sox17 Controls Emergence and Remodeling of Nestin-Expressing Coronary Vessels. Circ Res 2020; 127:e252-e270. [PMID: 32921258 DOI: 10.1161/circresaha.120.317121] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
RATIONALE The molecular mechanisms underlying the formation of coronary arteries during development and during cardiac neovascularization after injury are poorly understood. However, a detailed description of the relevant signaling pathways and functional TFs (transcription factors) regulating these processes is still incomplete. OBJECTIVE The goal of this study is to identify novel cardiac transcriptional mechanisms of coronary angiogenesis and vessel remodeling by defining the molecular signatures of coronary vascular endothelial cells during these complex processes. METHODS AND RESULTS We demonstrate that Nes-gfp and Nes-CreERT2 transgenic mouse lines are novel tools for studying the emergence of coronary endothelium and targeting sprouting coronary vessels (but not ventricular endocardium) during development. Furthermore, we identify Sox17 as a critical TF upregulated during the sprouting and remodeling of coronary vessels, visualized by a specific neural enhancer from the Nestin gene that is strongly induced in developing arterioles. Functionally, genetic-inducible endothelial deletion of Sox17 causes deficient cardiac remodeling of coronary vessels, resulting in improper coronary artery formation. CONCLUSIONS We demonstrated that Sox17 TF regulates the transcriptional activation of Nestin's enhancer in developing coronary vessels while its genetic deletion leads to inadequate coronary artery formation. These findings identify Sox17 as a critical regulator for the remodeling of coronary vessels in the developing heart.
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Affiliation(s)
- Sara González-Hernández
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain (S.G.-H., M.J.G., F.S.-C., P.M.-C., J.I.)
| | - Manuel J Gómez
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain (S.G.-H., M.J.G., F.S.-C., P.M.-C., J.I.)
- Bioinformatics Unit, CNIC, Madrid, Spain (M.J.G., F.S.-C.)
| | - Fátima Sánchez-Cabo
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain (S.G.-H., M.J.G., F.S.-C., P.M.-C., J.I.)
- Bioinformatics Unit, CNIC, Madrid, Spain (M.J.G., F.S.-C.)
| | - Simón Méndez-Ferrer
- WT-MRC Cambridge Stem Cell Institute and NHS-Blood and Transplant, Cambridge, United Kingdom (S.M.-F.)
| | - Pura Muñoz-Cánoves
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain (S.G.-H., M.J.G., F.S.-C., P.M.-C., J.I.)
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), Barcelona, Spain (P.M.-C., J.I.)
| | - Joan Isern
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain (S.G.-H., M.J.G., F.S.-C., P.M.-C., J.I.)
- Cell Biology Group, Department of Experimental and Health Sciences, Pompeu Fabra University (UPF), Barcelona, Spain (P.M.-C., J.I.)
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29
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Dazzi M, Rowland EM, Mohri Z, Weinberg PD. 3D confocal microscope imaging of macromolecule uptake in the intact brachiocephalic artery. Atherosclerosis 2020; 310:93-101. [PMID: 32861514 PMCID: PMC7534415 DOI: 10.1016/j.atherosclerosis.2020.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 06/20/2020] [Accepted: 07/02/2020] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND AIMS Elevated uptake of plasma macromolecules by the arterial wall is an early event in atherogenesis. Existing optical techniques for detecting macromolecular tracers in the wall have poor depth penetration and hence require en face imaging of flattened arterial segments. Imaging uptake in undistorted curved and branched vessels would be useful in understanding disease development. METHODS Depth penetration was increased by applying optical clearing techniques. The rat aorto-brachiocephalic junction was imaged intact by confocal microscopy after it had been exposed to circulating rhodamine-labelled albumin in vivo, fixed in situ, excised and then cleared with benzyl alcohol/benzyl benzoate. Tracer uptake was mapped onto a 3D surface mesh of the arterial geometry. RESULTS Tracer fluorescence was detectable throughout the wall closest to the objective lens and, despite a vessel diameter of c. 1 mm, in the wall on the other side of the artery, across the lumen. By tile scanning, tracer concentrations were mapped in the aorta, the brachiocephalic artery and their junction without opening or flattening either vessel. Optical clearing was also shown to be compatible with immunofluorescent staining and imaging of experimental atherosclerosis. CONCLUSIONS The technique obviates the need for labour-intensive sample preparation associated with standard en face imaging. More importantly, it preserves arterial geometry, facilitating co-localisation of uptake maps with maps of biomechanical factors, which typically exist on 3D surface meshes. It will permit the correlation of haemodynamic wall shear stress with macromolecule permeability more accurately in regions of high curvature or branching, such as in the coronary arteries.
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Affiliation(s)
- Marta Dazzi
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, UK
| | - Ethan M Rowland
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, UK
| | - Zahra Mohri
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, UK
| | - Peter D Weinberg
- Department of Bioengineering, Imperial College London, London, SW7 2AZ, UK.
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Fiorentino A, Christophorou A, Massa F, Garbay S, Chiral M, Ramsing M, Rasmussen M, Gubler MC, Bessieres B, Heidet L, Fischer E, Pontoglio M. Developmental Renal Glomerular Defects at the Origin of Glomerulocystic Disease. Cell Rep 2020; 33:108304. [PMID: 33113370 DOI: 10.1016/j.celrep.2020.108304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 07/28/2020] [Accepted: 10/02/2020] [Indexed: 12/26/2022] Open
Abstract
The architecture of renal glomeruli is acquired through intricate and still poorly understood developmental steps. In our study we identify a crucial glomerular morphogenetic event in nephrogenesis that drives the remodeling/separation of the prospective vascular pole (the future entrance of the glomerular arterioles) and the urinary pole (the tubular outflow). We demonstrate that this remodeling is genetically programmed. In fact, in mouse and human, the absence of HNF1B impairs the remodeling/separation of the two poles, leading to trapping and constriction of the tubular outflow inside the glomerulus. This aberration gives rise to obstructive glomerular dilations upon the initiation of primary urine production. In this context, we show that pharmacological decrease of glomerular filtration significantly contains cystic expansion. From a developmental point of view, our study discloses a crucial event on glomerular patterning affecting the "inside-outside" fate of the epithelia in the renal glomerulus.
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Affiliation(s)
- Arianna Fiorentino
- Université de Paris, Institut Necker-Enfants Malades (INEM), Epigenetics and Development Team, INSERM U1151, CNRS UMR 8253, 75015 Paris, France
| | - Armelle Christophorou
- Université de Paris, Institut Necker-Enfants Malades (INEM), Epigenetics and Development Team, INSERM U1151, CNRS UMR 8253, 75015 Paris, France
| | - Filippo Massa
- Université de Paris, Institut Necker-Enfants Malades (INEM), Epigenetics and Development Team, INSERM U1151, CNRS UMR 8253, 75015 Paris, France
| | - Serge Garbay
- Université de Paris, Institut Necker-Enfants Malades (INEM), Epigenetics and Development Team, INSERM U1151, CNRS UMR 8253, 75015 Paris, France
| | - Magali Chiral
- Université de Paris, Institut Necker-Enfants Malades (INEM), Epigenetics and Development Team, INSERM U1151, CNRS UMR 8253, 75015 Paris, France
| | - Mette Ramsing
- Department of Pathology, Randers Regional Hospital, 8930 Randers, Denmark
| | - Maria Rasmussen
- Department of Genetics, Vejle Hospital, Lillebælt Hospital, University of Southern Denmark, 7100 Vejle, Denmark
| | - Marie-Claire Gubler
- INSERM U1163/Centre de Référence MARHEA, Hôpital Necker-Enfants Malades, 75015 Paris, France
| | - Bettina Bessieres
- Service d'Histologie-Embryologie-Cytogénétique, Hôpital Necker-Enfants Malades, 75015 Paris, France
| | - Laurence Heidet
- INSERM U1163/Centre de Référence MARHEA, Hôpital Necker-Enfants Malades, 75015 Paris, France
| | - Evelyne Fischer
- Université de Paris, Institut Necker-Enfants Malades (INEM), Epigenetics and Development Team, INSERM U1151, CNRS UMR 8253, 75015 Paris, France.
| | - Marco Pontoglio
- Université de Paris, Institut Necker-Enfants Malades (INEM), Epigenetics and Development Team, INSERM U1151, CNRS UMR 8253, 75015 Paris, France.
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31
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Gómez-Gaviro MV, Sanderson D, Ripoll J, Desco M. Biomedical Applications of Tissue Clearing and Three-Dimensional Imaging in Health and Disease. iScience 2020; 23:101432. [PMID: 32805648 PMCID: PMC7452225 DOI: 10.1016/j.isci.2020.101432] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 12/27/2022] Open
Abstract
Three-dimensional (3D) optical imaging techniques can expand our knowledge about physiological and pathological processes that cannot be fully understood with 2D approaches. Standard diagnostic tests frequently are not sufficient to unequivocally determine the presence of a pathological condition. Whole-organ optical imaging requires tissue transparency, which can be achieved by using tissue clearing procedures enabling deeper image acquisition and therefore making possible the analysis of large-scale biological tissue samples. Here, we review currently available clearing agents, methods, and their application in imaging of physiological or pathological conditions in different animal and human organs. We also compare different optical tissue clearing methods discussing their advantages and disadvantages and review the use of different 3D imaging techniques for the visualization and image acquisition of cleared tissues. The use of optical tissue clearing resources for large-scale biological tissues 3D imaging paves the way for future applications in translational and clinical research.
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Affiliation(s)
- Maria Victoria Gómez-Gaviro
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, Spain; Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain.
| | - Daniel Sanderson
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain; Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain
| | - Jorge Ripoll
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain; Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain
| | - Manuel Desco
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, Spain; Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain; Centro Nacional de Investigaciones Cardiovasculares Carlos III, Madrid, Spain
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Kuo W, Le NA, Spingler B, Wenger RH, Kipar A, Hetzel U, Schulz G, Müller B, Kurtcuoglu V. Simultaneous Three-Dimensional Vascular and Tubular Imaging of Whole Mouse Kidneys With X-ray μCT. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2020; 26:731-740. [PMID: 32627730 DOI: 10.1017/s1431927620001725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Concurrent three-dimensional imaging of the renal vascular and tubular systems on the whole-kidney scale with capillary level resolution is labor-intensive and technically difficult. Approaches based on vascular corrosion casting and X-ray micro computed tomography (μCT), for example, suffer from vascular filling artifacts and necessitate imaging with an additional modality to acquire tubules. In this work, we report on a new sample preparation, image acquisition, and quantification protocol for simultaneous vascular and tubular μCT imaging of whole, uncorroded mouse kidneys. The protocol consists of vascular perfusion with the water-soluble, aldehyde-fixable, polymeric X-ray contrast agent XlinCA, followed by laboratory-source μCT imaging and structural analysis using the freely available Fiji/ImageJ software. We achieved consistent filling of the entire capillary bed and staining of the tubules in the cortex and outer medulla. After imaging at isotropic voxel sizes of 3.3 and 4.4 μm, we segmented vascular and tubular systems and quantified luminal volumes, surface areas, diffusion distances, and vessel path lengths. This protocol permits the analysis of vascular and tubular parameters with higher reliability than vascular corrosion casting, less labor than serial sectioning and leaves tissue intact for subsequent histological examination with light and electron microscopy.
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Affiliation(s)
- Willy Kuo
- University of Zurich, Institute of Physiology, Winterthurerstrasse 190, 8057Zurich, Switzerland
- University of Zurich, National Centre of Competence in Research, Kidney. CH, Winterthurerstrasse 190, 8057Zurich, Switzerland
- University of Basel, Biomaterials Science Center, Department of Biomedical Engineering, Gewerbestrasse 14, 4123Allschwil, Switzerland
| | - Ngoc An Le
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, 8057Zurich, Switzerland
| | - Bernhard Spingler
- University of Zurich, Department of Chemistry, Winterthurerstrasse 190, 8057Zurich, Switzerland
| | - Roland H Wenger
- University of Zurich, Institute of Physiology, Winterthurerstrasse 190, 8057Zurich, Switzerland
- University of Zurich, National Centre of Competence in Research, Kidney. CH, Winterthurerstrasse 190, 8057Zurich, Switzerland
| | - Anja Kipar
- University of Zurich, Laboratory for Animal Model Pathology (LAMP), Institute of Veterinary Pathology, Vetsuisse Faculty, Winterthurerstrasse 268, 8057Zurich, Switzerland
| | - Udo Hetzel
- University of Zurich, Electron Microscopy Unit, Institute of Veterinary Pathology, Vetsuisse Faculty, Winterthurerstrasse 268, 8057Zurich, Switzerland
| | - Georg Schulz
- University of Basel, Biomaterials Science Center, Department of Biomedical Engineering, Gewerbestrasse 14, 4123Allschwil, Switzerland
| | - Bert Müller
- University of Basel, Biomaterials Science Center, Department of Biomedical Engineering, Gewerbestrasse 14, 4123Allschwil, Switzerland
| | - Vartan Kurtcuoglu
- University of Zurich, Institute of Physiology, Winterthurerstrasse 190, 8057Zurich, Switzerland
- University of Zurich, National Centre of Competence in Research, Kidney. CH, Winterthurerstrasse 190, 8057Zurich, Switzerland
- University of Zurich, Zurich Center for Integrative Human Physiology, 8057Zurich, Switzerland
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Di Bona A, Vita V, Costantini I, Zaglia T. Towards a clearer view of sympathetic innervation of cardiac and skeletal muscles. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2020; 154:80-93. [DOI: 10.1016/j.pbiomolbio.2019.07.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/02/2019] [Accepted: 07/11/2019] [Indexed: 02/07/2023]
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34
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Yamak A, Hu D, Mittal N, Buikema JW, Ditta S, Lutz PG, Moog-Lutz C, Ellinor PT, Domian IJ. Loss of Asb2 Impairs Cardiomyocyte Differentiation and Leads to Congenital Double Outlet Right Ventricle. iScience 2020; 23:100959. [PMID: 32179481 PMCID: PMC7078385 DOI: 10.1016/j.isci.2020.100959] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 12/17/2019] [Accepted: 02/26/2020] [Indexed: 11/21/2022] Open
Abstract
Defining the pathways that control cardiac development facilitates understanding the pathogenesis of congenital heart disease. Herein, we identify enrichment of a Cullin5 Ub ligase key subunit, Asb2, in myocardial progenitors and differentiated cardiomyocytes. Using two conditional murine knockouts, Nkx+/Cre.Asb2fl/fl and AHF-Cre.Asb2fl/fl, and tissue clarifying technique, we reveal Asb2 requirement for embryonic survival and complete heart looping. Deletion of Asb2 results in upregulation of its target Filamin A (Flna), and concurrent Flna deletion partially rescues embryonic lethality. Conditional AHF-Cre.Asb2 knockouts harboring one Flna allele have double outlet right ventricle (DORV), which is rescued by biallelic Flna excision. Transcriptomic and immunofluorescence analyses identify Tgfβ/Smad as downstream targets of Asb2/Flna. Finally, using CRISPR/Cas9 genome editing, we demonstrate Asb2 requirement for human cardiomyocyte differentiation suggesting a conserved mechanism between mice and humans. Collectively, our study provides deeper mechanistic understanding of the role of the ubiquitin proteasome system in cardiac development and suggests a previously unidentified murine model for DORV. Flna removal partially rescues embryonic lethality of Asb2-heart-specific knockout AHF-Asb2 knockouts harboring one Flna allele have double outlet right ventricle Asb2-Flna regulate TGFβ-Smad2 signaling in the heart Conserved role of Asb2 in heart morphogenesis between mice and humans
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Affiliation(s)
- Abir Yamak
- Harvard Medical School, Boston, MA 02115, USA; Cardiovascular Research Center, Massachusetts General Hospital, 185 Cambridge Street, CPZN3200, Boston, MA 02114, USA; Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.
| | - Dongjian Hu
- Cardiovascular Research Center, Massachusetts General Hospital, 185 Cambridge Street, CPZN3200, Boston, MA 02114, USA; Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Nikhil Mittal
- Harvard Medical School, Boston, MA 02115, USA; Cardiovascular Research Center, Massachusetts General Hospital, 185 Cambridge Street, CPZN3200, Boston, MA 02114, USA
| | - Jan W Buikema
- Cardiovascular Research Center, Massachusetts General Hospital, 185 Cambridge Street, CPZN3200, Boston, MA 02114, USA; University Medical Center Utrecht, 3584 CX Utrecht, Netherlands
| | - Sheraz Ditta
- Cardiovascular Research Center, Massachusetts General Hospital, 185 Cambridge Street, CPZN3200, Boston, MA 02114, USA; Department of Pharmaceutical Sciences, Utrecht University, 3512 JE Utrecht, Netherlands
| | - Pierre G Lutz
- Institut de Pharmacologie et de Biologie Structurale, IPBS, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Christel Moog-Lutz
- Institut de Pharmacologie et de Biologie Structurale, IPBS, Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Patrick T Ellinor
- Harvard Medical School, Boston, MA 02115, USA; Cardiovascular Research Center, Massachusetts General Hospital, 185 Cambridge Street, CPZN3200, Boston, MA 02114, USA; Cardiovascular Disease Initiative, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Ibrahim J Domian
- Harvard Medical School, Boston, MA 02115, USA; Cardiovascular Research Center, Massachusetts General Hospital, 185 Cambridge Street, CPZN3200, Boston, MA 02114, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA.
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35
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Investigation of PRDM7 and PRDM12 expression pattern during mouse embryonic development by using a modified passive clearing technique. Biochem Biophys Res Commun 2020; 524:346-353. [PMID: 32000999 DOI: 10.1016/j.bbrc.2019.12.133] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 12/18/2019] [Indexed: 12/28/2022]
Abstract
Recent developments in tissue clearing methods such as CLARITY (Clear Lipid-exchanged Acrylamide-hybridized Rigid Imaging/Immunostaining/In situ hybridization-compatible Tissue hYdrogel) have allowed for the three-dimensional analysis of biological structures in whole, intact tissue, providing greater understanding of spatial relationships and biological circuits. Nonetheless, studies have reported issues with maintaining structural integrity and preventing tissue disintegration, preventing the wide application of these techniques to fragile tissues such as developing embryos. Here, we present optimized passive clearing techniques, mPACT-A, that improve tissue rigidity without the expense of optical transparency. We also present a further modified mPACT-A protocol that is specifically optimized for handling mouse embryos, which are small and fragile, such that they easily dismantle when processed via established tissue clearing methods. We demonstrate proof-of-concept by investigating the expression of two relatively understudied PRDM proteins, PRDM7 and PRDM12, in intact cleared mouse embryos at various stages of development. We observed strong PRDM7 and PRDM12 expression in the developing mouse nervous system, suggestive of potential roles in neural development that will be tested in future functional studies.
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36
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Foster DS, Nguyen AT, Chinta M, Salhotra A, Jones RE, Mascharak S, Titan AL, Ransom RC, da Silva OL, Foley E, Briger E, Longaker MT. A Clearing Technique to Enhance Endogenous Fluorophores in Skin and Soft Tissue. Sci Rep 2019; 9:15791. [PMID: 31673001 PMCID: PMC6823366 DOI: 10.1038/s41598-019-50359-x] [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: 03/22/2019] [Accepted: 09/06/2019] [Indexed: 12/26/2022] Open
Abstract
Fluorescent proteins are used extensively in transgenic animal models to label and study specific cell and tissue types. Expression of these proteins can be imaged and analyzed using fluorescent and confocal microscopy. Conventional confocal microscopes cannot penetrate through tissue more than 4–6 μm thick. Tissue clearing procedures overcome this challenge by rendering thick specimens into translucent tissue. However, most tissue clearing techniques do not satisfactorily preserve expression of endogenous fluorophores. Using simple adjustments to the BABB (Benzoic Acid Benzyl Benzoate) clearing methodology, preservation of fluorophore expression can be maintained. Modified BABB tissue clearing is a reliable technique to clear skin and soft tissue specimens for the study of dermal biology, wound healing and fibrotic pathologies.
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Affiliation(s)
- Deshka S Foster
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA.,Department of Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Alan T Nguyen
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Malini Chinta
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Ankit Salhotra
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - R Ellen Jones
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Shamik Mascharak
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Ashley L Titan
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA.,Department of Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - R Chase Ransom
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Oscar L da Silva
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Eliza Foley
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Emma Briger
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Michael T Longaker
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA. .,Department of Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA.
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38
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Watkins OC, Islam MO, Selvam P, Pillai RA, Cazenave-Gassiot A, Bendt AK, Karnani N, Godfrey KM, Lewis RM, Wenk MR, Chan SY. Metabolism of 13C-Labeled Fatty Acids in Term Human Placental Explants by Liquid Chromatography-Mass Spectrometry. Endocrinology 2019; 160:1394-1408. [PMID: 30920585 DOI: 10.1210/en.2018-01020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 03/21/2019] [Indexed: 12/18/2022]
Abstract
Placental lipid transport and metabolism are poorly understood despite the importance for fetal development and lifelong health. We aimed to explore fatty acid (FA) processing in human villous placental explants from seven uncomplicated term singleton pregnancies delivered by elective cesarean section. Explants were treated with stable isotope-labeled palmitic acid (13C-PA), oleic acid (13C-OA), or docosahexaenoic acid (13C-DHA) for 3, 24, or 48 hours. Stable isotope-labeled lipids synthesized by placental explants from labeled FA were quantified, alongside endogenous unlabeled placental lipids, by liquid chromatography-mass spectrometry. Labeled phosphatidylcholines (PCs), triacylglycerols (TAGs), and phosphatidylethanolamines were detected in explants, whereas labeled lysophosphatidylcholines were found in both explants and conditioned media. 13C-PA was primarily directed into PC synthesis (74% of 13C-PA-labeled lipids), whereas 13C-OA was directed almost equally into PC and TAG synthesis (45% and 53%, respectively, of 13C-OA-labeled lipids). 13C-DHA was only detectable in TAGs. TAGs demonstrated the highest isotopic enrichment for all 13C-FAs with 13C-OA-TAGs comprising >50% of total OA-TAGs (unlabeled and labeled), consistent with TAGs being a labile and accessible reservoir for FA storage. Variations in lipid incorporation were correlated to maternal glycemia and body mass index, suggesting that this experimental model could be used to investigate the effect of maternal factors on placental lipid metabolism. We conclude that lipid metabolic partitioning of freshly imported FAs into labile and less labile lipid reservoirs in placenta is FA dependent. This process may partly mediate the physiological preferential transplacental transfer of particular FAs to the fetus, but may also be implicated in the fetoplacental pathophysiology of maternal metabolic dysfunction.
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Affiliation(s)
- Oliver C Watkins
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Mohammad Omedul Islam
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Preben Selvam
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Reshma Appukuttan Pillai
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Amaury Cazenave-Gassiot
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore, Singapore
| | - Anne K Bendt
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore, Singapore
| | - Neerja Karnani
- Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore, Singapore
| | - Keith M Godfrey
- MRC Lifecourse Epidemiology Unit and NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Rohan M Lewis
- MRC Lifecourse Epidemiology Unit and NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Markus R Wenk
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore, Singapore
| | - Shiao-Yng Chan
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore, Singapore
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Gradinaru V, Treweek J, Overton K, Deisseroth K. Hydrogel-Tissue Chemistry: Principles and Applications. Annu Rev Biophys 2019; 47:355-376. [PMID: 29792820 PMCID: PMC6359929 DOI: 10.1146/annurev-biophys-070317-032905] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Over the past five years, a rapidly developing experimental approach has enabled high-resolution and high-content information retrieval from intact multicellular animal (metazoan) systems. New chemical and physical forms are created in the hydrogel-tissue chemistry process, and the retention and retrieval of crucial phenotypic information regarding constituent cells and molecules (and their joint interrelationships) are thereby enabled. For example, rich data sets defining both single-cell-resolution gene expression and single-cell-resolution activity during behavior can now be collected while still preserving information on three-dimensional positioning and/or brain-wide wiring of those very same neurons-even within vertebrate brains. This new approach and its variants, as applied to neuroscience, are beginning to illuminate the fundamental cellular and chemical representations of sensation, cognition, and action. More generally, reimagining metazoans as metareactants-or positionally defined three-dimensional graphs of constituent chemicals made available for ongoing functionalization, transformation, and readout-is stimulating innovation across biology and medicine.
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Affiliation(s)
- Viviana Gradinaru
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California 91125, USA;
| | - Jennifer Treweek
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, California 91125, USA;
| | - Kristin Overton
- Department of Bioengineering, Stanford University, Stanford, California 94305, USA;
| | - Karl Deisseroth
- Department of Bioengineering, Stanford University, Stanford, California 94305, USA; .,Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, California 94305, USA.,H oward Hughes Medical Institute, Stanford University, Stanford, California 94305, USA
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40
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Bossolani GDP, Pintelon I, Detrez JD, Buckinx R, Thys S, Zanoni JN, De Vos WH, Timmermans JP. Comparative analysis reveals Ce3D as optimal clearing method for in toto imaging of the mouse intestine. Neurogastroenterol Motil 2019; 31:e13560. [PMID: 30761698 DOI: 10.1111/nmo.13560] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 12/26/2018] [Accepted: 01/03/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND The intestinal wall has a complex topographical architecture. The multi-layered network of the enteric nervous system and its intercellular interactions are difficult to map using traditional section-based or whole-mount histology. With the advent of optical clearing techniques, it has become feasible to visualize intact tissue and organs in 3D. However, as yet, a gap still needs to be filled in that no in-depth analysis has been performed yet on the potential of different clearing techniques for the small intestine. AIM The goal of this study was to identify an optimal clearing protocol for in toto imaging of mouse intestinal tissue. METHODS Five aqueous-based clearing protocols (SeeDB2, CUBIC, ScaleS, Ce3D, and UbasM) and four organic reagent-based clearing protocols (3DISCO, iDISCO+, uDISCO, and Visikol® ) were assessed in segments of small intestine from CX3CR1GFP/GFP and wild-type mice. Following clearing, optical transparency, tissue morphology, green fluorescent protein (GFP) fluorescence retention, and compatibility with (immuno-)labeling were analyzed. KEY RESULTS All organic reagent-based clearing protocols-except for Visikol-rendered tissue highly transparent but led to substantial tissue shrinkage and deformation. Of the aqueous-based protocols, only Ce3D yielded full-thickness tissue transparency. In addition, Ce3D displayed excellent GFP retention and preservation of tissue morphology. CONCLUSIONS Ce3D emerged as a most efficient protocol for enabling rapid full-thickness 3D mapping of the mouse intestinal wall.
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Affiliation(s)
- Gleison D P Bossolani
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium.,Department of Morphological Sciences, State University of Maringá, Maringá, Brasil
| | - Isabel Pintelon
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Jan D Detrez
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Roeland Buckinx
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Sofie Thys
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | | | - Winnok H De Vos
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
| | - Jean-Pierre Timmermans
- Laboratory of Cell Biology and Histology, Department of Veterinary Sciences, University of Antwerp, Antwerp, Belgium
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Olejníčková V, Šaňková B, Sedmera D, Janáček J. Trabecular Architecture Determines Impulse Propagation Through the Early Embryonic Mouse Heart. Front Physiol 2019; 9:1876. [PMID: 30670981 PMCID: PMC6331446 DOI: 10.3389/fphys.2018.01876] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 12/11/2018] [Indexed: 12/12/2022] Open
Abstract
Most embryonic ventricular cardiomyocytes are quite uniform, in contrast to the adult heart, where the specialized ventricular conduction system is molecularly and functionally distinct from the working myocardium. We thus hypothesized that the preferential conduction pathway within the embryonic ventricle could be dictated by trabecular geometry. Mouse embryonic hearts of the Nkx2.5:eGFP strain between ED9.5 and ED14.5 were cleared and imaged whole mount by confocal microscopy, and reconstructed in 3D at 3.4 μm isotropic voxel size. The local orientation of the trabeculae, responsible for the anisotropic spreading of the signal, was characterized using spatially homogenized tensors (3 × 3 matrices) calculated from the trabecular skeleton. Activation maps were simulated assuming constant speed of spreading along the trabeculae. The results were compared with experimentally obtained epicardial activation maps generated by optical mapping with a voltage-sensitive dye. Simulated impulse propagation starting from the top of interventricular septum revealed the first epicardial breakthrough at the interventricular grove, similar to experimentally obtained activation maps. Likewise, ectopic activation from the left ventricular base perpendicular to dominant trabecular orientation resulted in isotropic and slower impulse spreading on the ventricular surface in both simulated and experimental conditions. We conclude that in the embryonic pre-septation heart, the geometry of the A-V connections and trabecular network is sufficient to explain impulse propagation and ventricular activation patterns.
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Affiliation(s)
- Veronika Olejníčková
- Department of Developmental Cardiology, Institute of Physiology of The Czech Academy of Sciences, Prague, Czechia
- First Faculty of Medicine, Charles University, Prague, Czechia
| | - Barbora Šaňková
- Department of Developmental Cardiology, Institute of Physiology of The Czech Academy of Sciences, Prague, Czechia
- First Faculty of Medicine, Charles University, Prague, Czechia
| | - David Sedmera
- Department of Developmental Cardiology, Institute of Physiology of The Czech Academy of Sciences, Prague, Czechia
- First Faculty of Medicine, Charles University, Prague, Czechia
| | - Jiří Janáček
- Department of Biomathematics, Institute of Physiology of The Czech Academy of Sciences, Prague, Czechia
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Mikolajewicz K, Chodaczek G. Going deeper: three-dimensional study of γδ T cells in mouse reproductive tract using tissue clearing methods. Immunol Cell Biol 2018; 97:104-111. [DOI: 10.1111/imcb.12202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 08/15/2018] [Accepted: 09/05/2018] [Indexed: 01/05/2023]
Affiliation(s)
- Katarzyna Mikolajewicz
- Laboratory of Reproductive Immunology; Hirszfeld Institute of Immunology and Experimental Therapy; Polish Academy of Sciences; Wroclaw Poland
- Confocal Microscopy Laboratory; PORT Polish Center for Technology Development; Wroclaw Poland
| | - Grzegorz Chodaczek
- Confocal Microscopy Laboratory; PORT Polish Center for Technology Development; Wroclaw Poland
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43
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Li Y, Xu J, Wan P, Yu T, Zhu D. Optimization of GFP Fluorescence Preservation by a Modified uDISCO Clearing Protocol. Front Neuroanat 2018; 12:67. [PMID: 30158858 PMCID: PMC6104128 DOI: 10.3389/fnana.2018.00067] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 07/25/2018] [Indexed: 12/12/2022] Open
Abstract
Tissue optical clearing techniques provide alternative approaches for imaging large-volume specimens. uDISCO, an organic-solvent-based method, stands out from the enormous array of available optical clearing methods by achieving whole-brain imaging with high transparency, size reduction and fluorescence preservation. In this study, we aimed to modify the uDISCO protocol to achieve better fluorescence preservation and to thereby further improve its optical imaging quality. First, we determined the optimal pH value for optimized uDISCO, termed “a-uDISCO” (alkaline pH-based uDISCO). Then, we compared fluorescence preservation between a-uDISCO and uDISCO. In addition, we validated the clearing performance of the optimized method according to several parameters, including tissue transparency, size changes, and the maintenance of cell morphology. Finally, we demonstrated that a-uDISCO enabled the high-quality brain-wide visualization of neuronal structures. This method potentially provides a better alternative for high-throughput imaging of samples with low-level fluorescence protein expression or for archiving and repetitive revisiting of rare samples.
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Affiliation(s)
- Yusha Li
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.,MoE Key Laboratory for Biomedical Photonics, Collaborative Innovation Center for Biomedical Engineering, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Jianyi Xu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.,MoE Key Laboratory for Biomedical Photonics, Collaborative Innovation Center for Biomedical Engineering, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Peng Wan
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.,MoE Key Laboratory for Biomedical Photonics, Collaborative Innovation Center for Biomedical Engineering, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Tingting Yu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.,MoE Key Laboratory for Biomedical Photonics, Collaborative Innovation Center for Biomedical Engineering, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
| | - Dan Zhu
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China.,MoE Key Laboratory for Biomedical Photonics, Collaborative Innovation Center for Biomedical Engineering, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, China
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Kajiya K, Bise R, Commerford C, Sato I, Yamashita T, Detmar M. Light-sheet microscopy reveals site-specific 3-dimensional patterns of the cutaneous vasculature and pronounced rarefication in aged skin. J Dermatol Sci 2018; 92:3-5. [PMID: 30076002 DOI: 10.1016/j.jdermsci.2018.07.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 07/16/2018] [Accepted: 07/18/2018] [Indexed: 11/15/2022]
Affiliation(s)
| | - Ryoma Bise
- National Institute of Informatics, Tokyo, Japan; Faculty of Information Science and Electrical Engineering, Kyushu University, Japan
| | - Catharina Commerford
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Switzerland
| | - Imari Sato
- National Institute of Informatics, Tokyo, Japan
| | | | - Michael Detmar
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Switzerland
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45
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Kolesová H, Bartoš M, Hsieh WC, Olejníčková V, Sedmera D. Novel approaches to study coronary vasculature development in mice. Dev Dyn 2018; 247:1018-1027. [DOI: 10.1002/dvdy.24637] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 05/04/2018] [Accepted: 05/08/2018] [Indexed: 12/19/2022] Open
Affiliation(s)
- Hana Kolesová
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
- Institute of Physiology; Czech Academy of Sciences; Prague Czech Republic
| | - Martin Bartoš
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
- Institute of Dental Medicine, First Faculty of Medicine; Charles University in Prague; Czech Republic
| | - Wan Chin Hsieh
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
| | - Veronika Olejníčková
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
- Institute of Physiology; Czech Academy of Sciences; Prague Czech Republic
| | - David Sedmera
- Institute of Anatomy, First Faculty of Medicine; Charles University in Prague; Czech Republic
- Institute of Physiology; Czech Academy of Sciences; Prague Czech Republic
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46
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Robinson JE, Gradinaru V. Dopaminergic dysfunction in neurodevelopmental disorders: recent advances and synergistic technologies to aid basic research. Curr Opin Neurobiol 2018; 48:17-29. [PMID: 28850815 PMCID: PMC5825239 DOI: 10.1016/j.conb.2017.08.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2017] [Accepted: 08/03/2017] [Indexed: 12/19/2022]
Abstract
Neurodevelopmental disorders (NDDs) represent a diverse group of syndromes characterized by abnormal development of the central nervous system and whose symptomatology includes cognitive, emotional, sensory, and motor impairments. The identification of causative genetic defects has allowed for creation of transgenic NDD mouse models that have revealed pathophysiological mechanisms of disease phenotypes in a neural circuit- and cell type-specific manner. Mouse models of several syndromes, including Rett syndrome, Fragile X syndrome, Angelman syndrome, Neurofibromatosis type 1, etc., exhibit abnormalities in the structure and function of dopaminergic circuitry, which regulates motivation, motor behavior, sociability, attention, and executive function. Recent advances in technologies for functional circuit mapping, including tissue clearing, viral vector-based tracing methods, and optical readouts of neural activity, have refined our knowledge of dopaminergic circuits in unperturbed states, yet these tools have not been widely applied to NDD research. Here, we will review recent findings exploring dopaminergic function in NDD models and discuss the promise of new tools to probe NDD pathophysiology in these circuits.
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Affiliation(s)
- J Elliott Robinson
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Viviana Gradinaru
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA.
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Lindsey BW, Douek AM, Loosli F, Kaslin J. A Whole Brain Staining, Embedding, and Clearing Pipeline for Adult Zebrafish to Visualize Cell Proliferation and Morphology in 3-Dimensions. Front Neurosci 2018; 11:750. [PMID: 29386991 PMCID: PMC5776138 DOI: 10.3389/fnins.2017.00750] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 12/22/2017] [Indexed: 01/08/2023] Open
Abstract
The field of macro-imaging has grown considerably with the appearance of innovative clearing methods and confocal microscopes with lasers capable of penetrating increasing tissue depths. The ability to visualize and model the growth of whole organs as they develop from birth, or with manipulation, disease or injury, provides new ways of thinking about development, tissue-wide signaling, and cell-to-cell interactions. The zebrafish (Danio rerio) has ascended from a predominantly developmental model to a leading adult model of tissue regeneration. The unmatched neurogenic and regenerative capacity of the mature central nervous system, in particular, has received much attention, however tools to interrogate the adult brain are sparse. At present there exists no straightforward methods of visualizing changes in the whole adult brain in 3-dimensions (3-D) to examine systemic patterns of cell proliferation or cell populations of interest under physiological, injury, or diseased conditions. The method presented here is the first of its kind to offer an efficient step-by-step pipeline from intraperitoneal injections of the proliferative marker, 5-ethynyl-2′-deoxyuridine (EdU), to whole brain labeling, to a final embedded and cleared brain sample suitable for 3-D imaging using optical projection tomography (OPT). Moreover, this method allows potential for imaging GFP-reporter lines and cell-specific antibodies in the presence or absence of EdU. The small size of the adult zebrafish brain, the highly consistent degree of EdU labeling, and the use of basic clearing agents, benzyl benzoate, and benzyl alcohol, makes this method highly tractable for most laboratories interested in understanding the vertebrate central nervous system in health and disease. Post-processing of OPT-imaged adult zebrafish brains injected with EdU illustrate that proliferative patterns in EdU can readily be observed and analyzed using IMARIS and/or FIJI/IMAGEJ software. This protocol will be a valuable tool to unlock new ways of understanding systemic patterns in cell proliferation in the healthy and injured brain, brain-wide cellular interactions, stem cell niche development, and changes in brain morphology.
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Affiliation(s)
- Benjamin W Lindsey
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
| | - Alon M Douek
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
| | - Felix Loosli
- Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Jan Kaslin
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
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48
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Konno A, Okazaki S. Aqueous-based tissue clearing in crustaceans. ZOOLOGICAL LETTERS 2018; 4:13. [PMID: 29930867 PMCID: PMC5991465 DOI: 10.1186/s40851-018-0099-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 05/11/2018] [Indexed: 05/14/2023]
Abstract
BACKGROUND Investigation of the internal tissues and organs of a macroscopic organism usually requires destructive processes, such as dissection or sectioning. These processes are inevitably associated with the loss of some spatial information. Recently, aqueous-based tissue clearing techniques, which allow whole-organ or even whole-body clearing of small rodents, have been developed and opened a new method of three-dimensional histology. It is expected that these techniques will be useful tools in the field of zoology, in which organisms with highly diverse morphology are investigated and compared. However, most of these new methods are optimized for soft, non-pigmented organs in small rodents, especially the brain, and their applicability to non-model organisms with hard exoskeletons and stronger pigmentation has not been tested. RESULTS We explored the possible application of an aqueous-based tissue clearing technique, advanced CUBIC, on small crustaceans. The original CUBIC procedure did not clear the terrestrial isopod, Armadillidium vulgare. Therefore, to apply the whole-mount clearing method to isopods with strong pigmentation and calcified exoskeletons, we introduced several pretreatment steps, including decalcification and bleaching. Thereafter, the clearing capacity of the procedure was dramatically improved, and A. vulgare became transparent. The internal organs, such as the digestive tract and male reproductive organs, were visible through sclerites using an ordinary stereomicroscope. We also found that fluorescent nuclear staining using propidium iodide (PI) helped to visualize the internal organs of cleared specimens. Our procedure was also effective on the marine crab, Philyra sp. CONCLUSIONS In this study, we developed a method to clear whole tissues of crustaceans. To the best of our knowledge, this is the first report of whole-mount clearing applied to crustaceans using an aqueous-based technique. This technique could facilitate morphological studies of crustaceans and other organisms with calcified exoskeletons and pigmentation.
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Affiliation(s)
- Alu Konno
- Department of Medical Spectroscopy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu-City, Shizuoka-Pref 431-3192 Japan
| | - Shigetoshi Okazaki
- Department of Medical Spectroscopy, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu-City, Shizuoka-Pref 431-3192 Japan
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49
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Prats‐Galino A, Čapek M, Reina MA, Cvetko E, Radochova B, Tubbs RS, Damjanovska M, Stopar Pintarič T. 3D reconstruction of peripheral nerves from optical projection tomography images: A method for studying fascicular interconnections and intraneural plexuses. Clin Anat 2017; 31:424-431. [DOI: 10.1002/ca.23028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/26/2017] [Accepted: 11/27/2017] [Indexed: 01/13/2023]
Affiliation(s)
- Alberto Prats‐Galino
- Laboratory of Surgical NeuroAnatomy, Human Anatomy and Embryology Unit, Faculty of Medicine, Universitat de BarcelonaBarcelona Spain
| | - Martin Čapek
- Institute of Molecular Genetics of the Czech Academy of SciencesPrague Czech Republic
| | - Miguel A. Reina
- CEU San Pablo University School of Medicine, Madrid and Department of AnesthesiologyMadrid‐Montepríncipe University HospitalMadrid Spain
| | - Erika Cvetko
- Institute of Anatomy, Faculty of MedicineUniversity of LjubljanaLjubljana Slovenia
| | - Barbora Radochova
- Institute of Physiology of the Czech Academy of SciencesPrague Czech Republic
| | - R. Shane Tubbs
- Seattle Science FoundationDepartment of Anatomical Sciences, St. George's UniversityGrenada
| | - Marija Damjanovska
- Clinical Department of Anesthesiology and Intensive TherapyUniversity Medical Center LjubljanaLjubljana Slovenia
| | - Tatjana Stopar Pintarič
- Clinical Department of Anesthesiology and Intensive TherapyUniversity Medical Center LjubljanaLjubljana Slovenia
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50
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Jensen KHR, Berg RW. Advances and perspectives in tissue clearing using CLARITY. J Chem Neuroanat 2017; 86:19-34. [DOI: 10.1016/j.jchemneu.2017.07.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/12/2017] [Accepted: 07/12/2017] [Indexed: 12/16/2022]
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