1
|
Alberini R, Spagnoli A, Sadeghinia MJ, Skallerud B, Terzano M, Holzapfel GA. Second harmonic generation microscopy, biaxial mechanical tests and fiber dispersion models in human skin biomechanics. Acta Biomater 2024:S1742-7061(24)00398-2. [PMID: 39048027 DOI: 10.1016/j.actbio.2024.07.026] [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: 02/27/2024] [Revised: 07/13/2024] [Accepted: 07/16/2024] [Indexed: 07/27/2024]
Abstract
Advanced numerical simulations of the mechanical behavior of human skin require thorough calibration of the material's constitutive models based on experimental ex vivo mechanical tests along with images of tissue microstructure for a variety of biomedical applications. In this work, a total of 14 human healthy skin samples and 4 additional scarred skin samples were experimentally analyzed to gain deep insights into the biomechanics of human skin. In particular, second harmonic generation microscopy was used to extract detailed images of the distribution of collagen fibers, which were subsequently processed using a three-dimensional Fourier transform-based method recently proposed by the authors to quantify the distribution of fiber orientations. Mechanical tests under both biaxial and uniaxial loading were performed to calibrate the relevant mechanical parameters of two widely used constitutive models of soft fiber-reinforced biological tissues that account for non-symmetrical fiber dispersion. The calibration of the models allowed us to identify correlations between the mechanical parameters of the considered constitutive models. STATEMENT OF SIGNIFICANCE: Constitutive models for soft collagenous tissues can accurately reproduce the complex nonlinear and anisotropic mechanical behavior of skin. However, a comprehensive analysis of both microstructural and mechanical parameters is still missing for human skin. In this study, these parameters are determined by combining biaxial mechanical tests and SHG stacks of collagen fibers on ex vivo healthy human skin samples. The constitutive parameters are provided for two widely used hyperelastic models and enable accurate characterization of skin mechanical behavior for advanced numerical simulations.
Collapse
Affiliation(s)
- Riccardo Alberini
- Department of Engineering and Architecture, University of Parma, Parma, Italy
| | - Andrea Spagnoli
- Department of Engineering and Architecture, University of Parma, Parma, Italy.
| | - Mohammad Javad Sadeghinia
- Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Bjorn Skallerud
- Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Michele Terzano
- Institute of Biomechanics, Graz University of Technology, Graz, Austria
| | - Gerhard A Holzapfel
- Institute of Biomechanics, Graz University of Technology, Graz, Austria; Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| |
Collapse
|
2
|
Rahimnejad M, Makkar H, Dal-Fabbro R, Malda J, Sriram G, Bottino MC. Biofabrication Strategies for Oral Soft Tissue Regeneration. Adv Healthc Mater 2024; 13:e2304537. [PMID: 38529835 PMCID: PMC11254569 DOI: 10.1002/adhm.202304537] [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: 12/19/2023] [Revised: 03/01/2024] [Indexed: 03/27/2024]
Abstract
Gingival recession, a prevalent condition affecting the gum tissues, is characterized by the exposure of tooth root surfaces due to the displacement of the gingival margin. This review explores conventional treatments, highlighting their limitations and the quest for innovative alternatives. Importantly, it emphasizes the critical considerations in gingival tissue engineering leveraging on cells, biomaterials, and signaling factors. Successful tissue-engineered gingival constructs hinge on strategic choices such as cell sources, scaffold design, mechanical properties, and growth factor delivery. Unveiling advancements in recent biofabrication technologies like 3D bioprinting, electrospinning, and microfluidic organ-on-chip systems, this review elucidates their precise control over cell arrangement, biomaterials, and signaling cues. These technologies empower the recapitulation of microphysiological features, enabling the development of gingival constructs that closely emulate the anatomical, physiological, and functional characteristics of native gingival tissues. The review explores diverse engineering strategies aiming at the biofabrication of realistic tissue-engineered gingival grafts. Further, the parallels between the skin and gingival tissues are highlighted, exploring the potential transfer of biofabrication approaches from skin tissue regeneration to gingival tissue engineering. To conclude, the exploration of innovative biofabrication technologies for gingival tissues and inspiration drawn from skin tissue engineering look forward to a transformative era in regenerative dentistry with improved clinical outcomes.
Collapse
Affiliation(s)
- Maedeh Rahimnejad
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Hardik Makkar
- Faculty of Dentistry, National University of Singapore, Singapore
| | - Renan Dal-Fabbro
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Jos Malda
- Regenerative Medicine Center Utrecht, Utrecht, The Netherlands
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
- Department of Orthopedics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Gopu Sriram
- Faculty of Dentistry, National University of Singapore, Singapore
- NUS Centre for Additive Manufacturing (AM.NUS), National University of Singapore, Singapore
- Department of Biomedical Engineering, National University of Singapore, Singapore
| | - Marco C. Bottino
- Department of Cariology, Restorative Sciences, and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
- Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA
| |
Collapse
|
3
|
Soumier A, Lio G, Demily C. Current and future applications of light-sheet imaging for identifying molecular and developmental processes in autism spectrum disorders. Mol Psychiatry 2024:10.1038/s41380-024-02487-8. [PMID: 38443634 DOI: 10.1038/s41380-024-02487-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 02/09/2024] [Accepted: 02/13/2024] [Indexed: 03/07/2024]
Abstract
Autism spectrum disorder (ASD) is identified by a set of neurodevelopmental divergences that typically affect the social communication domain. ASD is also characterized by heterogeneous cognitive impairments and is associated with cooccurring physical and medical conditions. As behaviors emerge as the brain matures, it is particularly essential to identify any gaps in neurodevelopmental trajectories during early perinatal life. Here, we introduce the potential of light-sheet imaging for studying developmental biology and cross-scale interactions among genetic, cellular, molecular and macroscale levels of circuitry and connectivity. We first report the core principles of light-sheet imaging and the recent progress in studying brain development in preclinical animal models and human organoids. We also present studies using light-sheet imaging to understand the development and function of other organs, such as the skin and gastrointestinal tract. We also provide information on the potential of light-sheet imaging in preclinical drug development. Finally, we speculate on the translational benefits of light-sheet imaging for studying individual brain-body interactions in advancing ASD research and creating personalized interventions.
Collapse
Affiliation(s)
- Amelie Soumier
- Le Vinatier Hospital Center, 95 boulevard Pinel, 69675, Bron cedex, France.
- iMIND, Center of Excellence for Autism, 95 boulevard Pinel, 69675, Bron cedex, France.
- Institute of Cognitive Science Marc Jeannerod, CNRS, UMR 5229, 67 boulevard Pinel, 69675, Bron cedex, France.
- University Claude Bernard Lyon 1, 43 boulevard du 11 Novembre 1918, 69622, Villeurbanne cedex, France.
| | - Guillaume Lio
- Le Vinatier Hospital Center, 95 boulevard Pinel, 69675, Bron cedex, France
- iMIND, Center of Excellence for Autism, 95 boulevard Pinel, 69675, Bron cedex, France
- Institute of Cognitive Science Marc Jeannerod, CNRS, UMR 5229, 67 boulevard Pinel, 69675, Bron cedex, France
| | - Caroline Demily
- Le Vinatier Hospital Center, 95 boulevard Pinel, 69675, Bron cedex, France
- iMIND, Center of Excellence for Autism, 95 boulevard Pinel, 69675, Bron cedex, France
- Institute of Cognitive Science Marc Jeannerod, CNRS, UMR 5229, 67 boulevard Pinel, 69675, Bron cedex, France
- University Claude Bernard Lyon 1, 43 boulevard du 11 Novembre 1918, 69622, Villeurbanne cedex, France
| |
Collapse
|
4
|
Miller JL, Reddy A, Harman RM, Van de Walle GR. A xenotransplantation mouse model to study physiology of the mammary gland from large mammals. PLoS One 2024; 19:e0298390. [PMID: 38416747 PMCID: PMC10901318 DOI: 10.1371/journal.pone.0298390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 01/23/2024] [Indexed: 03/01/2024] Open
Abstract
Although highly conserved in structure and function, many (patho)physiological processes of the mammary gland vary drastically between mammals, with mechanisms regulating these differences not well understood. Large mammals display variable lactation strategies and mammary cancer incidence, however, research into these variations is often limited to in vitro analysis due to logistical limitations. Validating a model with functional mammary xenografts from cryopreserved tissue fragments would allow for in vivo comparative analysis of mammary glands from large and/or rare mammals and would improve our understanding of postnatal development, lactation, and premalignancy across mammals. To this end, we generated functional mammary xenografts using mammary tissue fragments containing mammary stroma and parenchyma isolated via an antibody-independent approach from healthy, nulliparous equine and canine donor tissues to study these species in vivo. Cryopreserved mammary tissue fragments were xenotransplanted into de-epithelialized fat pads of immunodeficient mice and resulting xenografts were structurally and functionally assessed. Preimplantation of mammary stromal fibroblasts was performed to promote ductal morphogenesis. Xenografts recapitulated mammary lobule architecture and contained donor-derived stromal components. Mammatropic hormone stimulation resulted in (i) upregulation of lactation-associated genes, (ii) altered proliferation index, and (iii) morphological changes, indicating functionality. Preimplantation of mammary stromal fibroblasts did not promote ductal morphogenesis. This model presents the opportunity to study novel mechanisms regulating unique lactation strategies and mammary cancer induction in vivo. Due to the universal applicability of this approach, this model serves as proof-of-concept for developing mammary xenografts for in vivo analysis of virtually any mammals, including large and rare mammals.
Collapse
Affiliation(s)
- James L Miller
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - Alexandra Reddy
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - Rebecca M Harman
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| | - Gerlinde R Van de Walle
- Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, New York, United States of America
| |
Collapse
|
5
|
Rinaldi AO, Li M, Barletta E, D'Avino P, Yazici D, Pat Y, Ward S, Burla D, Tan G, Askary N, Larsson R, Bost J, Babayev H, Dhir R, Gaudenzio N, Akdis M, Nadeau K, Akdis CA, Mitamura Y. Household laundry detergents disrupt barrier integrity and induce inflammation in mouse and human skin. Allergy 2024; 79:128-141. [PMID: 37766519 DOI: 10.1111/all.15891] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 08/15/2023] [Accepted: 09/05/2023] [Indexed: 09/29/2023]
Abstract
BACKGROUND Epithelial barrier impairment is associated with many skin and mucosal inflammatory disorders. Laundry detergents have been demonstrated to affect epithelial barrier function in vitro using air-liquid interface cultures of human epithelial cells. METHODS Back skin of C57BL/6 mice was treated with two household laundry detergents at several dilutions. Barrier function was assessed by electric impedance spectroscopy (EIS) and transepidermal water loss (TEWL) measurements after the 4 h of treatments with detergents. RNA sequencing (RNA-seq) and targeted multiplex proteomics analyses in skin biopsy samples were performed. The 6-h treatment effect of laundry detergent and sodium dodecyl sulfate (SDS) was investigated on ex vivo human skin. RESULTS Detergent-treated skin showed a significant EIS reduction and TEWL increase compared to untreated skin, with a relatively higher sensitivity and dose-response in EIS. The RNA-seq showed the reduction of the expression of several genes essential for skin barrier integrity, such as tight junctions and adherens junction proteins. In contrast, keratinization, lipid metabolic processes, and epidermal cell differentiation were upregulated. Proteomics analysis showed that the detergents treatment generally downregulated cell adhesion-related proteins, such as epithelial cell adhesion molecule and contactin-1, and upregulated proinflammatory proteins, such as interleukin 6 and interleukin 1 beta. Both detergent and SDS led to a significant decrease in EIS values in the ex vivo human skin model. CONCLUSION The present study demonstrated that laundry detergents and its main component, SDS impaired the epidermal barrier in vivo and ex vivo human skin. Daily detergent exposure may cause skin barrier disruption and may contribute to the development of atopic diseases.
Collapse
Affiliation(s)
- Arturo O Rinaldi
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | - Manru Li
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | - Elena Barletta
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | - Paolo D'Avino
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | - Duygu Yazici
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | - Yagiz Pat
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | - Siobhan Ward
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
- Christine Kühne - Center for Allergy Research and Education (CK-CARE), Davos, Switzerland
| | - Daniel Burla
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | - Ge Tan
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | | | | | | | - Huseyn Babayev
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | - Raja Dhir
- SEED, Inc, Co, Los Angeles, California, USA
| | - Nicolas Gaudenzio
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), INSERM UMR1291, CNRS UMR5051, University Toulouse III, Toulouse, France
- Genoskin SAS, Toulouse, France
| | - Mubeccel Akdis
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| | - Kari Nadeau
- Department of Environmental Studies, Harvard T.H. Chan School of Public Health, Cambridge, Massachusetts, USA
| | - Cezmi A Akdis
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
- Christine Kühne - Center for Allergy Research and Education (CK-CARE), Davos, Switzerland
| | - Yasutaka Mitamura
- Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland
| |
Collapse
|
6
|
Ryu Y, Kim Y, Park SJ, Kim SR, Kim HJ, Ha CM. Comparison of Light-Sheet Fluorescence Microscopy and Fast-Confocal Microscopy for Three-Dimensional Imaging of Cleared Mouse Brain. Methods Protoc 2023; 6:108. [PMID: 37987355 PMCID: PMC10660704 DOI: 10.3390/mps6060108] [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: 08/18/2023] [Revised: 11/05/2023] [Accepted: 11/06/2023] [Indexed: 11/22/2023] Open
Abstract
Whole-brain imaging is important for understanding brain functions through deciphering tissue structures, neuronal circuits, and single-neuron tracing. Thus, many clearing methods have been developed to acquire whole-brain images or images of three-dimensional thick tissues. However, there are several limitations to imaging whole-brain volumes, including long image acquisition times, large volumes of data, and a long post-image process. Based on these limitations, many researchers are unsure about which light microscopy is most suitable for imaging thick tissues. Here, we compared fast-confocal microscopy with light-sheet fluorescence microscopy for whole-brain three-dimensional imaging, which can acquire images the fastest. To compare the two types of microscopies for large-volume imaging, we performed tissue clearing of a whole mouse brain, and changed the sample chamber and low- magnification objective lens and modified the sample holder of a light-sheet fluorescence microscope. We found out that light-sheet fluorescence microscopy using a 2.5× objective lens possesses several advantages, including saving time, large-volume image acquisitions, and high Z-resolution, over fast-confocal microscopy, which uses a 4× objective lens. Therefore, we suggest that light-sheet fluorescence microscopy is suitable for whole mouse brain imaging and for obtaining high-resolution three-dimensional images.
Collapse
Affiliation(s)
- Youngjae Ryu
- Research Strategy Office and Brain Research Core Facilities of Korea Brain Research Institute, Daegu 41062, Republic of Korea; (Y.R.); (Y.K.)
- Department of Histology, College of Veterinary Medicine, Kyungpook University, Daegu 41566, Republic of Korea;
| | - Yoonju Kim
- Research Strategy Office and Brain Research Core Facilities of Korea Brain Research Institute, Daegu 41062, Republic of Korea; (Y.R.); (Y.K.)
| | - Sang-Joon Park
- Department of Histology, College of Veterinary Medicine, Kyungpook University, Daegu 41566, Republic of Korea;
| | - Sung Rae Kim
- Dementia Research Group, Korea Brain Research Institute, Daegu 41062, Republic of Korea; (S.R.K.); (H.-J.K.)
| | - Hyung-Jun Kim
- Dementia Research Group, Korea Brain Research Institute, Daegu 41062, Republic of Korea; (S.R.K.); (H.-J.K.)
| | - Chang Man Ha
- Research Strategy Office and Brain Research Core Facilities of Korea Brain Research Institute, Daegu 41062, Republic of Korea; (Y.R.); (Y.K.)
| |
Collapse
|
7
|
Ghose S, Ju Y, McDonough E, Ho J, Karunamurthy A, Chadwick C, Cho S, Rose R, Corwin A, Surrette C, Martinez J, Williams E, Sood A, Al-Kofahi Y, Falo LD, Börner K, Ginty F. 3D reconstruction of skin and spatial mapping of immune cell density, vascular distance and effects of sun exposure and aging. Commun Biol 2023; 6:718. [PMID: 37468758 PMCID: PMC10356782 DOI: 10.1038/s42003-023-04991-z] [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: 04/28/2022] [Accepted: 05/11/2023] [Indexed: 07/21/2023] Open
Abstract
Mapping the human body at single cell resolution in three dimensions (3D) is important for understanding cellular interactions in context of tissue and organ organization. 2D spatial cell analysis in a single tissue section may be limited by cell numbers and histology. Here we show a workflow for 3D reconstruction of multiplexed sequential tissue sections: MATRICS-A (Multiplexed Image Three-D Reconstruction and Integrated Cell Spatial - Analysis). We demonstrate MATRICS-A in 26 serial sections of fixed skin (stained with 18 biomarkers) from 12 donors aged between 32-72 years. Comparing the 3D reconstructed cellular data with the 2D data, we show significantly shorter distances between immune cells and vascular endothelial cells (56 µm in 3D vs 108 µm in 2D). We also show 10-70% more T cells (total) within 30 µm of a neighboring T helper cell in 3D vs 2D. Distances of p53, DDB2 and Ki67 positive cells to the skin surface were consistent across all ages/sun exposure and largely localized to the lower stratum basale layer of the epidermis. MATRICS-A provides a framework for analysis of 3D spatial cell relationships in healthy and aging organs and could be further extended to diseased organs.
Collapse
Affiliation(s)
- Soumya Ghose
- GE Research Center, 1 Research Circle, Niskayuna, NY, 12309, USA
| | - Yingnan Ju
- Indiana University, 107 South Indiana Ave, Bloomington, IN, 47405, USA
| | | | - Jonhan Ho
- University of Pittsburgh School of Medicine, 3550 Terrace St, Pittsburgh, PA, 15213, USA
| | | | | | - Sanghee Cho
- GE Research Center, 1 Research Circle, Niskayuna, NY, 12309, USA
| | - Rachel Rose
- GE Research Center, 1 Research Circle, Niskayuna, NY, 12309, USA
| | - Alex Corwin
- GE Research Center, 1 Research Circle, Niskayuna, NY, 12309, USA
| | | | - Jessica Martinez
- GE Research Center, 1 Research Circle, Niskayuna, NY, 12309, USA
| | - Eric Williams
- GE Research Center, 1 Research Circle, Niskayuna, NY, 12309, USA
| | - Anup Sood
- GE Research Center, 1 Research Circle, Niskayuna, NY, 12309, USA
| | - Yousef Al-Kofahi
- GE Research Center, 1 Research Circle, Niskayuna, NY, 12309, USA
| | - Louis D Falo
- University of Pittsburgh School of Medicine, 3550 Terrace St, Pittsburgh, PA, 15213, USA
| | - Katy Börner
- Indiana University, 107 South Indiana Ave, Bloomington, IN, 47405, USA.
| | - Fiona Ginty
- GE Research Center, 1 Research Circle, Niskayuna, NY, 12309, USA.
| |
Collapse
|
8
|
Ngo TB, DeStefano S, Liu J, Su Y, Shroff H, Vishwasrao HD, Sadtler K. Label-free cleared tissue microscopy and machine learning for 3D histopathology of biomaterial implants. J Biomed Mater Res A 2023; 111:840-850. [PMID: 36861434 DOI: 10.1002/jbm.a.37515] [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: 11/08/2022] [Revised: 01/18/2023] [Accepted: 02/08/2023] [Indexed: 03/03/2023]
Abstract
Tissue clearing of whole intact organs has enhanced imaging by enabling the exploration of tissue structure at a subcellular level in three-dimensional space. Although clearing and imaging of the whole organ have been used to study tissue biology, the microenvironment in which cells evolve to adapt to biomaterial implants or allografts in the body is poorly understood. Obtaining high-resolution information from complex cell-biomaterial interactions with volumetric landscapes represents a key challenge in the fields of biomaterials and regenerative medicine. To provide a new approach to examine how tissue responds to biomaterial implants, we apply cleared tissue light-sheet microscopy and three-dimensional reconstruction to utilize the wealth of autofluorescence information for visualizing and contrasting anatomical structures. This study demonstrates the adaptability of the clearing and imaging technique to provide sub-cellular resolution (0.6 μm isotropic) 3D maps of various tissue types, using samples from fully intact peritoneal organs to volumetric muscle loss injury specimens. Specifically, in the volumetric muscle loss injury model, we provide 3D visualization of the implanted extracellular matrix biomaterial in the wound bed of the quadricep muscle groups and further apply computational-driven image classification to analyze the autofluorescence spectrum at multiple emission wavelengths to categorize tissue types at the injured site interacting with the biomaterial scaffolds.
Collapse
Affiliation(s)
- Tran B Ngo
- Section on Immunoengineering, Bioengineering and Technology Acceleration Center, National Institute for Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, USA
| | - Sabrina DeStefano
- Section on Immunoengineering, Bioengineering and Technology Acceleration Center, National Institute for Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, USA
| | - Jiamin Liu
- Advanced Imaging and Microscopy Resource, National Institute for Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, USA
| | - Yijun Su
- Advanced Imaging and Microscopy Resource, National Institute for Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, USA
| | - Hari Shroff
- Advanced Imaging and Microscopy Resource, National Institute for Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, USA
| | - Harshad D Vishwasrao
- Advanced Imaging and Microscopy Resource, National Institute for Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, USA
| | - Kaitlyn Sadtler
- Section on Immunoengineering, Bioengineering and Technology Acceleration Center, National Institute for Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, Maryland, USA
| |
Collapse
|
9
|
Pinkert-Leetsch D, Rost JU, Schmiedeknecht MUH, Stadelmann C, Alves F, Missbach-Guentner J. The murine male reproductive organ at a glance: Three-dimensional insights and virtual histology using label-free light sheet microcopy. Andrology 2022; 10:1660-1672. [PMID: 36082398 DOI: 10.1111/andr.13292] [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: 02/28/2022] [Revised: 08/16/2022] [Accepted: 09/05/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND The unique anatomy of the male reproductive organ reflects its complex function from sperm maturation to their storage for months until emission. Since light microscopy in two dimensions (2d) cannot sufficiently demonstrate its complex morphology, a comprehensive visualization is required to identify pathologic alterations in its entire anatomical context. OBJECTIVES Aim of this study was to use three-dimensional (3d) light sheet fluorescence microscopy (LSFM) to visualize entire murine testes in 3d, label-free and at subcellular resolution, and to assign local autofluorescence to testicular and deferent structures. MATERIALS AND METHODS Murine testes were fixed with four different fixatives and subsequently cleared with benzoic acid/benzyl benzoate. Hereafter, complete murine testes were scanned with LSFM with different fluorescence filter sets and subsequently embedded in paraffin for further conventional planar histology. RESULTS Autofluorescence signals of the murine reproductive organ allowed the unambiguous identification of the testicular anatomy from the seminiferous tubules to the vas deferens with their specific stratification independent of the used fixative. Blood vessels were visualized from the pampiniform plexus to the small capillaries of single tubules. Moreover, due to the specific intrinsic fluorescence properties of the efferent ducts and the epididymis, luminal caliber, the epithelial stratification and retronuclear cytoplasmic inclusions gave a unique insight into the interface of both morphological structures. Subsequent 2d histology confirmed the identified morphological structures. DISCUSSION LSFM analysis of the murine reproductive organ allows due to its intrinsic fluorescence a simple, label-free 3d assessment of its entire duct morphology, the epithelial composition and the associated blood supply in its anatomical relation. CONCLUSION LSFM provides the technical basis for comprehensive analyses of pathologically altered murine testes in its entirety by depicting specific autofluorescence. Thereby it facilitates mouse studies of testicular disease or their drug related alterations in more detail potentially for clinical translation assessing human testicular biopsies. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Diana Pinkert-Leetsch
- Department of Diagnostic and Interventional Radiology, University Medical Center Goettingen, Goettingen, Germany.,Translational Molecular Imaging, Max-Planck-Institute for Multidisciplinary Sciences, Goettingen, Germany
| | - John Uwe Rost
- Department of Diagnostic and Interventional Radiology, University Medical Center Goettingen, Goettingen, Germany
| | | | - Christine Stadelmann
- Department of Neuropathology, University Medical Center Goettingen, Goettingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Goettingen, Germany
| | - Frauke Alves
- Department of Diagnostic and Interventional Radiology, University Medical Center Goettingen, Goettingen, Germany.,Translational Molecular Imaging, Max-Planck-Institute for Multidisciplinary Sciences, Goettingen, Germany.,Department of Hematology and Medical Oncology, University Medical Center Goettingen, Goettingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Goettingen, Germany
| | - Jeannine Missbach-Guentner
- Department of Diagnostic and Interventional Radiology, University Medical Center Goettingen, Goettingen, Germany
| |
Collapse
|
10
|
Engel TN, Abraham TM, Morningstar T, Fung MA, Rangchi A, Kiuru M, Fereidouni F, Levenson R. Pilot study of FIBI (Fluorescence Imitating Brightfield Imaging) for rapid, slide‐free dermatopathology. J Cutan Pathol 2022; 49:1060-1066. [DOI: 10.1111/cup.14308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 07/11/2022] [Accepted: 08/02/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Tess N. Engel
- School of Medicine University of California Davis Sacramento CA USA
| | - Tanishq Mathew Abraham
- Department of Pathology and Laboratory Medicine University of California Davis Sacramento CA USA
| | - Taryn Morningstar
- Department of Pathology and Laboratory Medicine University of California Davis Sacramento CA USA
| | - Maxwell A. Fung
- Department of Pathology and Laboratory Medicine University of California Davis Sacramento CA USA
- Department of Dermatology University of California Davis Sacramento CA USA
| | - Arshia Rangchi
- Department of Pathology and Laboratory Medicine University of California Davis Sacramento CA USA
| | - Maija Kiuru
- Department of Pathology and Laboratory Medicine University of California Davis Sacramento CA USA
- Department of Dermatology University of California Davis Sacramento CA USA
| | - Farzad Fereidouni
- Department of Pathology and Laboratory Medicine University of California Davis Sacramento CA USA
| | - Richard Levenson
- Department of Pathology and Laboratory Medicine University of California Davis Sacramento CA USA
| |
Collapse
|
11
|
A 3D Analysis of Cleared Human Melanoma. Biomedicines 2022; 10:biomedicines10071580. [PMID: 35884885 PMCID: PMC9313268 DOI: 10.3390/biomedicines10071580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 11/16/2022] Open
Abstract
Cutaneous melanoma is one of the most aggressive and deadliest cancers in human beings due to its invasiveness and other factors. Histopathological analysis is crucial for a proper diagnosis. Optical tissue clearing is a novel field that allows 3D image acquisition of large-scale biological tissues. Optical clearing and immunolabeling for 3D fluorescence imaging has yet to be extensively applied to melanoma. In the present manuscript, we establish, for the first time, an optical clearing and immunostaining procedure for human melanoma and human cell line-derived melanoma xenograft models using the CUBIC (clear, unobstructed brain imaging cocktails) technique. We have successfully cleared the samples and achieved 3D volumetric visualization of the tumor microenvironment, vasculature, and cell populations.
Collapse
|
12
|
Patel KB, Liang W, Casper MJ, Voleti V, Li W, Yagielski AJ, Zhao HT, Perez Campos C, Lee GS, Liu JM, Philipone E, Yoon AJ, Olive KP, Coley SM, Hillman EMC. High-speed light-sheet microscopy for the in-situ acquisition of volumetric histological images of living tissue. Nat Biomed Eng 2022; 6:569-583. [PMID: 35347275 PMCID: PMC10353946 DOI: 10.1038/s41551-022-00849-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 01/21/2022] [Indexed: 11/09/2022]
Abstract
Histological examinations typically require the excision of tissue, followed by its fixation, slicing, staining, mounting and imaging, with timeframes ranging from minutes to days. This process may remove functional tissue, may miss abnormalities through under-sampling, prevents rapid decision-making, and increases costs. Here, we report the feasibility of microscopes based on swept confocally aligned planar excitation technology for the volumetric histological imaging of intact living tissue in real time. The systems' single-objective, light-sheet geometry and 3D imaging speeds enable roving image acquisition, which combined with 3D stitching permits the contiguous analysis of large tissue areas, as well as the dynamic assessment of tissue perfusion and function. Implemented in benchtop and miniaturized form factors, the microscopes also have high sensitivity, even for weak intrinsic fluorescence, allowing for the label-free imaging of diagnostically relevant histoarchitectural structures, as we show for pancreatic disease in living mice, for chronic kidney disease in fresh human kidney tissues, and for oral mucosa in a healthy volunteer. Miniaturized high-speed light-sheet microscopes for in-situ volumetric histological imaging may facilitate the point-of-care detection of diverse cellular-level biomarkers.
Collapse
Affiliation(s)
- Kripa B Patel
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Wenxuan Liang
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Malte J Casper
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Venkatakaushik Voleti
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Wenze Li
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Alexis J Yagielski
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Hanzhi T Zhao
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Citlali Perez Campos
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Grace Sooyeon Lee
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Joyce M Liu
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA
| | - Elizabeth Philipone
- Department of Oral and Maxillofacial Pathology, Columbia University Irving Medical Center, New York, NY, USA
| | - Angela J Yoon
- Department of Oral and Maxillofacial Pathology, Columbia University Irving Medical Center, New York, NY, USA
| | - Kenneth P Olive
- Division of Digestive and Liver Disease, Herbert Irving Comprehensive Cancer Center, Columbia University Irving Medical Center, New York, NY, USA
| | - Shana M Coley
- Department of Pathology and Cell Biology, Vagelos College of Physicians and Surgeons, Columbia University Medical Center, New York, NY, USA
| | - Elizabeth M C Hillman
- Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology and the Mortimer B. Zuckerman Mind Brain Behavior Institute, Columbia University, New York, NY, USA.
| |
Collapse
|
13
|
Carré D, Martin V, Kouidri Y, Morin R, Norlund M, Gomes A, Lagarde JM, Lezmi S. The distribution of neuromuscular junctions depends on muscle pennation, when botulinum neurotoxin receptors and SNAREs expression are uniform in the rat. Toxicon 2022; 212:34-41. [DOI: 10.1016/j.toxicon.2022.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/12/2022] [Accepted: 04/05/2022] [Indexed: 11/25/2022]
|
14
|
Delgado-Rodriguez P, Brooks CJ, Vaquero JJ, Muñoz-Barrutia A. Innovations in ex vivo Light Sheet Fluorescence Microscopy. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2022; 168:37-51. [PMID: 34293338 DOI: 10.1016/j.pbiomolbio.2021.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 07/12/2021] [Indexed: 06/13/2023]
Abstract
Light Sheet Fluorescence Microscopy (LSFM) has revolutionized how optical imaging of biological specimens can be performed as this technique allows to produce 3D fluorescence images of entire samples with a high spatiotemporal resolution. In this manuscript, we aim to provide readers with an overview of the field of LSFM on ex vivo samples. Recent advances in LSFM architectures have made the technique widely accessible and have improved its acquisition speed and resolution, among other features. These developments are strongly supported by quantitative analysis of the huge image volumes produced thanks to the boost in computational capacities, the advent of Deep Learning techniques, and by the combination of LSFM with other imaging modalities. Namely, LSFM allows for the characterization of biological structures, disease manifestations and drug effectivity studies. This information can ultimately serve to develop novel diagnostic procedures, treatments and even to model the organs physiology in healthy and pathological conditions.
Collapse
Affiliation(s)
- Pablo Delgado-Rodriguez
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain
| | - Claire Jordan Brooks
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain
| | - Juan José Vaquero
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain; Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Arrate Muñoz-Barrutia
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III de Madrid, Madrid, Spain; Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.
| |
Collapse
|
15
|
3D Model Characterization by 2D and 3D Imaging in t(14;18)-Positive B-NHL: Perspectives for In Vitro Drug Screens in Follicular Lymphoma. Cancers (Basel) 2021; 13:cancers13071490. [PMID: 33804934 PMCID: PMC8036410 DOI: 10.3390/cancers13071490] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/05/2021] [Accepted: 03/06/2021] [Indexed: 12/14/2022] Open
Abstract
Simple Summary Follicular lymphoma is an indolent B cell lymphoproliferative disorder of transformed follicular center B cells, which accounts for 20–30 percent of all non-Hodgkin lymphoma (NHL) cases. Although huge efforts have been made in the last 10 years, this pathology is still considered as incurable, leaving open the discovery and testing of new therapeutic targets requiring relevant preclinical models. Here, we report a realistic 3D model of t (14;18)-positive B-NHL cell culture (ultra-low attachment (ULA)-multicellular aggregates of lymphoma cells (MALC)), which monitored by state-of-the-art 2D and 3D imaging, allows more robust drug testing. Abstract Follicular lymphoma (FL) is an indolent B cell lymphoproliferative disorder of transformed follicular center B cells, which accounts for 20–30 percent of all non-Hodgkin lymphoma (NHL) cases. Great advances have been made to identify the most relevant targets for precision therapy. However, no relevant models for in vitro studies have been developed or characterized in depth. To this purpose, we generated a 3D cell model from t(14;18)-positive B-NHL cell lines cultured in ultra-low attachment 96-well plates. Morphological features and cell growth behavior were evaluated by classical microscopy (2D imaging) and response to treatment with different drugs was evaluated by a high-content analysis system to determine the robustness of the model. We show that the ultra-low attachment (ULA) method allows the development of regular, spherical and viable ULA-multicellular aggregates of lymphoma cells (MALC). However, discrepancies in the results obtained after 2D imaging analyses on drug-treated ULA-MALC prompted us to develop 3D imaging and specific analyses. We show by using light sheet microscopy and specifically developed 3D imaging algorithms that 3D imaging and dedicated analyses are necessary to characterize morphological properties of 3D models and drug effects. This study proposes a new method, but also imaging tools and informatic solutions, developed for FL necessary for future preclinical studies.
Collapse
|
16
|
Buglak NE, Lucitti J, Ariel P, Maiocchi S, Miller FJ, Bahnson ESM. Light sheet fluorescence microscopy as a new method for unbiased three-dimensional analysis of vascular injury. Cardiovasc Res 2021; 117:520-532. [PMID: 32053173 PMCID: PMC7820842 DOI: 10.1093/cvr/cvaa037] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 01/02/2020] [Accepted: 02/05/2020] [Indexed: 12/12/2022] Open
Abstract
AIMS Assessment of preclinical models of vascular disease is paramount in the successful translation of novel treatments. The results of these models have traditionally relied on two-dimensional (2D) histological methodologies. Light sheet fluorescence microscopy (LSFM) is an imaging platform that allows for three-dimensional (3D) visualization of whole organs and tissues. In this study, we describe an improved methodological approach utilizing LSFM for imaging of preclinical vascular injury models while minimizing analysis bias. METHODS AND RESULTS The rat carotid artery segmental pressure-controlled balloon injury and mouse carotid artery ligation injury were performed. Arteries were harvested and processed for LSFM imaging and 3D analysis, as well as for 2D area histological analysis. Artery processing for LSFM imaging did not induce vessel shrinkage or expansion and was reversible by rehydrating the artery, allowing for subsequent sectioning and histological staining a posteriori. By generating a volumetric visualization along the length of the arteries, LSFM imaging provided different analysis modalities including volumetric, area, and radial parameters. Thus, LSFM-imaged arteries provided more precise measurements compared to classic histological analysis. Furthermore, LSFM provided additional information as compared to 2D analysis in demonstrating remodelling of the arterial media in regions of hyperplasia and periadventitial neovascularization around the ligated mouse artery. CONCLUSION LSFM provides a novel and robust 3D imaging platform for visualizing and quantifying arterial injury in preclinical models. When compared with classic histology, LSFM outperformed traditional methods in precision and quantitative capabilities. LSFM allows for more comprehensive quantitation as compared to traditional histological methodologies, while minimizing user bias associated with area analysis of alternating, 2D histological artery cross-sections.
Collapse
Affiliation(s)
- Nicholas E Buglak
- Division of Vascular Surgery, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Curriculum in Toxicology & Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- McAllister Heart Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | | | - Pablo Ariel
- Microscopy Services Laboratory, Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Sophie Maiocchi
- Division of Vascular Surgery, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- McAllister Heart Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Francis J Miller
- Department of Medicine, Duke University, Durham, NC 27708, USA
- Department of Medicine, Veterans Administration Medical Center, Durham, NC 27705, USA
| | - Edward S M Bahnson
- Division of Vascular Surgery, Department of Surgery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Center for Nanotechnology in Drug Delivery, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Curriculum in Toxicology & Environmental Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- McAllister Heart Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
- Department of Cell Biology & Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| |
Collapse
|
17
|
Fiedler S, Wünnemann H, Hofmann I, Theobalt N, Feuchtinger A, Walch A, Schwaiger J, Wanke R, Blutke A. A practical guide to unbiased quantitative morphological analyses of the gills of rainbow trout (Oncorhynchus mykiss) in ecotoxicological studies. PLoS One 2020; 15:e0243462. [PMID: 33296424 PMCID: PMC7725368 DOI: 10.1371/journal.pone.0243462] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 11/21/2020] [Indexed: 12/28/2022] Open
Abstract
Rainbow trout (Oncorhynchus mykiss) are frequently used as experimental animals in ecotoxicological studies, in which they are experimentally exposed to defined concentrations of test substances, such as heavy metals, pesticides, or pharmaceuticals. Following exposure to a broad variety of aquatic pollutants, early morphologically detectable toxic effects often manifest in alterations of the gills. Suitable methods for an accurate and unbiased quantitative characterization of the type and the extent of morphological gill alterations are therefore essential prerequisites for recognition, objective evaluation and comparison of the severity of gill lesions. The aim of the present guidelines is to provide practicable, standardized and detailed protocols for the application of unbiased quantitative stereological analyses of relevant morphological parameters of the gills of rainbow trout. These gill parameters inter alia include the total volume of the primary and secondary gill lamellae, the surface area of the secondary gill lamellae epithelium (i.e., the respiratory surface) and the thickness of the diffusion barrier. The featured protocols are adapted to fish of frequently used body size classes (300-2000 g). They include well-established, conventional sampling methods, probes and test systems for unbiased quantitative stereological analyses of light- and electron microscopic 2-D gill sections, as well as the application of modern 3-D light sheet fluorescence microscopy (LSFM) of optically cleared gill samples as an innovative, fast and efficient quantitative morphological analysis approach. The methods shown here provide a basis for standardized and representative state-of-the-art quantitative morphological analyses of trout gills, ensuring the unbiasedness and reproducibility, as well as the intra- and inter-study comparability of analyses results. Their broad implementation will therefore significantly contribute to the reliable identification of no observed effect concentration (NOEC) limits in ecotoxicological studies and, moreover, to limit the number of experimental animals by reduction of unnecessary repetition of experiments.
Collapse
Affiliation(s)
- Sonja Fiedler
- Institute of Veterinary Pathology at the Center for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Hannah Wünnemann
- Unit 73 Aquatic Ecotoxicology, Microbial Ecology, Bavarian Environment Agency, Wielenbach, Germany
| | - Isabel Hofmann
- Institute of Veterinary Pathology at the Center for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Natalie Theobalt
- Institute of Veterinary Pathology at the Center for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Annette Feuchtinger
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Axel Walch
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - Julia Schwaiger
- Unit 73 Aquatic Ecotoxicology, Microbial Ecology, Bavarian Environment Agency, Wielenbach, Germany
| | - Rüdiger Wanke
- Institute of Veterinary Pathology at the Center for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Andreas Blutke
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
- * E-mail:
| |
Collapse
|
18
|
Nguyen CD, O'Neal PK, Kulkarni N, Yang E, Kang D. Scattering-Based Light-Sheet Microscopy for Rapid Cellular Imaging of Fresh Tissue. Lasers Surg Med 2020; 53:872-879. [PMID: 33259692 DOI: 10.1002/lsm.23361] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/26/2020] [Accepted: 11/08/2020] [Indexed: 01/05/2023]
Abstract
BACKGROUND AND OBJECTIVES Light-sheet microscopy (LSM) is a novel imaging technology that has been used for imaging fluorescence contrast in basic life science research. In this paper, we have developed a scattering-based LSM (sLSM) for rapidly imaging the cellular morphology of fresh tissues without any exogenous fluorescent dyes. STUDY DESIGN/MATERIALS AND METHODS In the sLSM device, a thin light sheet with the central wavelength of 834 nm was incident on the tissue obliquely, 45° relative to the tissue surface. The detection optics was configured to map the light sheet-illuminated area onto a two-dimensional imaging sensor. The illumination numerical aperture (NA) was set as 0.0625, and the detection NA 0.3. RESULTS The sLSM device achieved a light sheet thickness of less than 6.7 µm over 284 µm along the illumination optical axis. The detection optics of the sLSM device had a resolution of 1.8 µm. The sLSM images of the swine kidney ex vivo visualized tubules with similar sizes and shapes to those observed in histopathologic images. The swine duodenum sLSM images revealed cell nuclei and villi architecture in superficial lesions and glands in deeper regions. CONCLUSIONS The preliminary results suggest that sLSM may have the potential for rapidly examining the freshly-excised tissue ex vivo or intact tissue in vivo at microscopic resolution. Further optimization and performance evaluation of the sLSM technology will be needed in the future. Lasers Surg. Med. © 2020 Wiley Periodicals LLC.
Collapse
Affiliation(s)
| | - Patrick K O'Neal
- College of Optical Sciences, University of Arizona, Tucson, Arizona, 85721
| | - Nachiket Kulkarni
- College of Optical Sciences, University of Arizona, Tucson, Arizona, 85721
| | - Eric Yang
- School of Medicine, Stanford University, Stanford, California, 94305
| | - Dongkyun Kang
- College of Optical Sciences, University of Arizona, Tucson, Arizona, 85721.,Department of Biomedical Engineering, University of Arizona, Tucson, Arizona, 85721
| |
Collapse
|
19
|
Fu X, Cheong YH, Ahamed A, Zhou C, Robert C, Krikstolaityte V, Gordon KC, Lisak G. Diagnostics of skin features through 3D skin mapping based on electro-controlled deposition of conducting polymers onto metal-sebum modified surfaces and their possible applications in skin treatment. Anal Chim Acta 2020; 1142:84-98. [PMID: 33280707 DOI: 10.1016/j.aca.2020.10.056] [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: 06/18/2020] [Revised: 10/02/2020] [Accepted: 10/27/2020] [Indexed: 11/26/2022]
Abstract
Analytical diagnostics of skin features was developed through application of portable and fast skin mapping based on electro-controlled deposition of conducting polymers onto metal-sebum modified surfaces. In this analytical diagnostic technique, the development of skin pattern is based on electropolymerization of conducting polymers within insulating barriers in skin stamp provided by natural sebum to monitor the 3D nature of various skin features. The recorded skin maps reach a μm-level resolution and are proved to be capable of recognition, enhancement, and reproduction of surface outlines of various skin topographies, subsequently assisting dermatological diagnosis. The technique can precisely record skin surface morphology and reflect the vertical dimension information within 10 min and is aimed to assist dermatologists working with patients suffering from skin diseases via recording or monitoring the skin surface conditions. Additionally, successful trials of loading and electro-controlled release of Cu2+ into/from the developed skin patterns reveals its potential to be also utilized for treatment of pathological skin conditions. Based on the developed analytical diagnostic technique, a well-designed 3D printed portable prototype device based on electrosynthesis of the conducting polymer powered by an ordinary battery (1.5 V) was tested and was found to have excellent performance in onsite 3D skin pattern reproduction from live human skin.
Collapse
Affiliation(s)
- Xiaoxu Fu
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, CleanTech, Singapore, 637141, Singapore
| | - Yi-Heng Cheong
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, CleanTech, Singapore, 637141, Singapore
| | - Ashiq Ahamed
- Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, CleanTech, Singapore, 637141, Singapore; Åbo Akademi University, Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Biskopsgatan 8, FI-20500, Turku/Åbo, Finland
| | - Chao Zhou
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Chima Robert
- Department of Chemistry, University of Otago, 70 Union Street, West Dunedin, 9016, New Zealand
| | - Vida Krikstolaityte
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, CleanTech, Singapore, 637141, Singapore
| | - Keith C Gordon
- Department of Chemistry, University of Otago, 70 Union Street, West Dunedin, 9016, New Zealand
| | - Grzegorz Lisak
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore; Nanyang Environment and Water Research Institute, Residues and Resource Reclamation Center, 1 Cleantech Loop, CleanTech, Singapore, 637141, Singapore.
| |
Collapse
|
20
|
Tan Y, Chiam CPL, Zhang Y, Tey HL, Ng LG. Research Techniques Made Simple: Optical Clearing and Three-Dimensional Volumetric Imaging of Skin Biopsies. J Invest Dermatol 2020; 140:1305-1314.e1. [PMID: 32571496 DOI: 10.1016/j.jid.2020.04.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 03/31/2020] [Accepted: 04/27/2020] [Indexed: 11/25/2022]
Abstract
Skin histology is traditionally carried out using two-dimensional tissue sections, which allows for rapid staining, but these sections cannot accurately represent three-dimensional structures in skin such as nerves, vasculature, hair follicles, and sebaceous glands. Although it may be ideal to image skin in a three-dimensional manner, it is technically challenging to image deep into tissue because of light scattering from collagen fibrils in the dermis and refractive index mismatch owing to the presence of differing biological materials such as cytoplasm, and lipids in the skin. Different optical clearing methods have been developed recently, making it possible to render tissues transparent using different approaches. Here, we discuss the steps involved in tissue preparation for three-dimensional volumetric imaging and provide a brief overview of the different optical clearing methods as well as different imaging modalities for three-dimensional imaging.
Collapse
Affiliation(s)
- Yingrou Tan
- Department of Research, National Skin Centre, Singapore; Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore
| | - Carolyn Pei Lyn Chiam
- School of Medicine, Dentistry & Nursing, University of Glasgow, Glasgow, United Kingdom
| | - Yuning Zhang
- Faculty of Science, National University of Singapore, Singapore
| | - Hong Liang Tey
- Department of Research, National Skin Centre, Singapore; Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Lai Guan Ng
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), Biopolis, Singapore.
| |
Collapse
|
21
|
Challenges in Developing a Human Model System for Skin Microbiome Research. J Invest Dermatol 2020; 141:228-231.e4. [PMID: 32522484 DOI: 10.1016/j.jid.2020.05.096] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/29/2020] [Accepted: 05/10/2020] [Indexed: 11/22/2022]
|
22
|
Touloumes GJ, Ardoña HAM, Casalino EK, Zimmerman JF, Chantre CO, Bitounis D, Demokritou P, Parker KK. Mapping 2D- and 3D-distributions of metal/metal oxide nanoparticles within cleared human ex vivo skin tissues. NANOIMPACT 2020; 17:100208. [PMID: 33251378 PMCID: PMC7687853 DOI: 10.1016/j.impact.2020.100208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
An increasing number of commercial skincare products are being manufactured with engineered nanomaterials (ENMs), prompting a need to fully understand how ENMs interact with the dermal barrier as a major biodistribution entry route. Although animal studies show that certain nanomaterials can cross the skin barrier, physiological differences between human and animal skin, such as the lack of sweat glands, limit the translational validity of these results. Current optical microscopy methods have limited capabilities to visualize ENMs within human skin tissues due to the high amount of background light scattering caused by the dense, ubiquitous extracellular matrix (ECM) of the skin. Here, we hypothesized that organic solvent-based tissue clearing ("immunolabeling-enabled three-dimensional imaging of solvent-cleared organs", or "iDISCO") would reduce background light scattering from the extracellular matrix of the skin to sufficiently improve imaging contrast for both 2D mapping of unlabeled metal oxide ENMs and 3D mapping of fluorescent nanoparticles. We successfully mapped the 2D distribution of label-free TiO2 and ZnO nanoparticles in cleared skin sections using correlated signals from darkfield, brightfield, and confocal microscopy, as well as micro-spectroscopy. Specifically, hyperspectral microscopy and Raman spectroscopy confirmed the identity of label-free ENMs which we mapped within human skin sections. We also measured the 3D distribution of fluorescently labeled Ag nanoparticles in cleared skin biopsies with wounded epidermal layers using light sheet fluorescence microscopy. Overall, this study explores a novel strategy for quantitatively mapping ENM distributions in cleared ex vivo human skin tissue models using multiple imaging modalities. By improving the imaging contrast, we present label-free 2D ENM tracking and 3D ENM mapping as promising capabilities for nanotoxicology investigations.
Collapse
Affiliation(s)
- George J. Touloumes
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA
| | - Herdeline Ann M. Ardoña
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA
| | - Evan K. Casalino
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA
| | - John F. Zimmerman
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA
| | - Christophe O. Chantre
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA
| | - Dimitrios Bitounis
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, T. H. Chan School of Public Health, Harvard University, Boston, MA 02115 USA
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, T. H. Chan School of Public Health, Harvard University, Boston, MA 02115 USA
| | - Kevin Kit Parker
- Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138 USA
| |
Collapse
|
23
|
Santin Y, Fazal L, Sainte-Marie Y, Sicard P, Maggiorani D, Tortosa F, Yücel YY, Teyssedre L, Rouquette J, Marcellin M, Vindis C, Shih JC, Lairez O, Burlet-Schiltz O, Parini A, Lezoualc'h F, Mialet-Perez J. Mitochondrial 4-HNE derived from MAO-A promotes mitoCa 2+ overload in chronic postischemic cardiac remodeling. Cell Death Differ 2019; 27:1907-1923. [PMID: 31819159 DOI: 10.1038/s41418-019-0470-y] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 11/25/2019] [Accepted: 11/25/2019] [Indexed: 02/01/2023] Open
Abstract
Chronic remodeling postmyocardial infarction consists in various maladaptive changes including interstitial fibrosis, cardiomyocyte death and mitochondrial dysfunction that lead to heart failure (HF). Reactive aldehydes such as 4-hydroxynonenal (4-HNE) are critical mediators of mitochondrial dysfunction but the sources of mitochondrial 4-HNE in cardiac diseases together with its mechanisms of action remain poorly understood. Here, we evaluated whether the mitochondrial enzyme monoamine oxidase-A (MAO-A), which generates H2O2 as a by-product of catecholamine metabolism, is a source of deleterious 4-HNE in HF. We found that MAO-A activation increased mitochondrial ROS and promoted local 4-HNE production inside the mitochondria through cardiolipin peroxidation in primary cardiomyocytes. Deleterious effects of MAO-A/4-HNE on cardiac dysfunction were prevented by activation of mitochondrial aldehyde dehydrogenase 2 (ALDH2), the main enzyme for 4-HNE metabolism. Mechanistically, MAO-A-derived 4-HNE bound to newly identified targets VDAC and MCU to promote ER-mitochondria contact sites and MCU higher-order complex formation. The resulting mitochondrial Ca2+ accumulation participated in mitochondrial respiratory dysfunction and loss of membrane potential, as shown with the protective effects of the MCU inhibitor, RU360. Most interestingly, these findings were recapitulated in a chronic model of ischemic remodeling where pharmacological or genetic inhibition of MAO-A protected the mice from 4-HNE accumulation, MCU oligomer formation and Ca2+ overload, thus mitigating ventricular dysfunction. To our knowledge, these are the first evidences linking MAO-A activation to mitoCa2+ mishandling through local 4-HNE production, contributing to energetic failure and postischemic remodeling.
Collapse
Affiliation(s)
- Yohan Santin
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France
| | - Loubina Fazal
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France
| | - Yannis Sainte-Marie
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France
| | - Pierre Sicard
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France.,INSERM, CNRS, Université de Montpellier, PHYMEDEXP, Montpellier, France
| | - Damien Maggiorani
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France
| | - Florence Tortosa
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France
| | - Yasemin Yücel Yücel
- Department of Biochemistry, School of Pharmacy, Altinbas University, Istanbul, Turkey
| | | | | | - Marlene Marcellin
- Institut de Pharmacologie et de Biologie Structurale, CNRS, Université de Toulouse, UPS, Toulouse, France
| | - Cécile Vindis
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France
| | - Jean C Shih
- University of Southern California, Los Angeles, CA, USA
| | - Olivier Lairez
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France
| | - Odile Burlet-Schiltz
- Institut de Pharmacologie et de Biologie Structurale, CNRS, Université de Toulouse, UPS, Toulouse, France
| | - Angelo Parini
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France.
| | - Frank Lezoualc'h
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France
| | - Jeanne Mialet-Perez
- Institute of Metabolic and Cardiovascular Diseases (I2MC), INSERM, Université de Toulouse, Toulouse, France.
| |
Collapse
|
24
|
Lang TC, Zhao R, Kim A, Wijewardena A, Vandervord J, Xue M, Jackson CJ. A Critical Update of the Assessment and Acute Management of Patients with Severe Burns. Adv Wound Care (New Rochelle) 2019; 8:607-633. [PMID: 31827977 PMCID: PMC6904939 DOI: 10.1089/wound.2019.0963] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 04/18/2019] [Indexed: 12/14/2022] Open
Abstract
Significance: Burns are debilitating, life threatening, and difficult to assess and manage. Recent advances in assessment and management have occurred since a comprehensive review of the care of patients with severe burns was last published, which may influence research and clinical practice. Recent Advances: Recent advances have occurred in the understanding of burn pathophysiology, which has led to the identification of potential biomarkers of burn severity, such as protein C. There is new evidence about the potential superiority of natural colloids over crystalloids during fluid resuscitation, and new evidence about components of initial and perioperative management, including an improved understanding of pain following burns. Critical Issues: The limitations of the clinical examination highlight the need for imaging and biomarkers to assist in estimations of burn severity. Fluid resuscitation reduces mortality, although there is conjecture over the ideal method. The subsequent perioperative period is associated with significant morbidity and the evidence for preventing and treating pain, infection, and fluid overload while maximizing wound healing potential is described. Future Directions: Promising developments are ongoing in imaging technology, histopathology, biomarkers, and wound healing adjuncts such as hyperbaric oxygen therapy, topical negative pressure therapy, stem cell treatments, and skin substitutes. The greatest benefit from further research on management of patients with burns would most likely be derived from the elucidation of optimal fluid resuscitation protocols, pain management protocols, and surgical techniques from randomized controlled trials.
Collapse
Affiliation(s)
- Thomas Charles Lang
- Department of Anesthesia, Prince of Wales and Sydney Children's Hospitals, Randwick, Australia
| | - Ruilong Zhao
- Sutton Laboratories, The Kolling Institute, St. Leonards, Australia
| | - Albert Kim
- Department of Critical Care Medicine, Royal North Shore Hospital, St. Leonards, Australia
| | - Aruna Wijewardena
- Department of Burns, Reconstructive and Plastic Surgery, Royal North Shore Hospital, St. Leonards, Australia
| | - John Vandervord
- Department of Burns, Reconstructive and Plastic Surgery, Royal North Shore Hospital, St. Leonards, Australia
| | - Meilang Xue
- Sutton Laboratories, The Kolling Institute, St. Leonards, Australia
| | | |
Collapse
|
25
|
Ultra-thin fluorocarbon foils optimise multiscale imaging of three-dimensional native and optically cleared specimens. Sci Rep 2019; 9:17292. [PMID: 31754183 PMCID: PMC6872575 DOI: 10.1038/s41598-019-53380-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 10/31/2019] [Indexed: 01/09/2023] Open
Abstract
In three-dimensional light microscopy, the heterogeneity of the optical density in a specimen ultimately limits the achievable penetration depth and hence the three-dimensional resolution. The most direct approach to reduce aberrations, improve the contrast and achieve an optimal resolution is to minimise the impact of changes of the refractive index along an optical path. Many implementations of light sheet fluorescence microscopy operate with a large chamber filled with an aqueous immersion medium and a further inner container with the specimen embedded in a possibly entirely different non-aqueous medium. In order to minimise the impact of the latter on the optical quality of the images, we use multi-facetted cuvettes fabricated from vacuum-formed ultra-thin fluorocarbon (FEP) foils. The ultra-thin FEP-foil cuvettes have a wall thickness of about 10–12 µm. They are impermeable to liquids, but not to gases, inert, durable, mechanically stable and flexible. Importantly, the usually fragile specimen can remain in the same cuvette from seeding to fixation, clearing and observation, without the need to remove or remount it during any of these steps. We confirm the improved imaging performance of ultra-thin FEP-foil cuvettes with excellent quality images of whole organs such us mouse oocytes, of thick tissue sections from mouse brain and kidney as well as of dense pancreas and liver organoid clusters. Our ultra-thin FEP-foil cuvettes outperform many other sample-mounting techniques in terms of a full separation of the specimen from the immersion medium, compatibility with aqueous and organic clearing media, quick specimen mounting without hydrogel embedding and their applicability for multiple-view imaging and automated image segmentation. Additionally, we show that ultra-thin FEP foil cuvettes are suitable for seeding and growing organoids over a time period of at least ten days. The new cuvettes allow the fixation and staining of specimens inside the holder, preserving the delicate morphology of e.g. fragile, mono-layered three-dimensional organoids.
Collapse
|
26
|
Krishnamurthy S, Brown JQ, Iftimia N, Levenson RM, Rajadhyaksha M. Ex Vivo Microscopy: A Promising Next-Generation Digital Microscopy Tool for Surgical Pathology Practice. Arch Pathol Lab Med 2019; 143:1058-1068. [PMID: 31295016 PMCID: PMC7365575 DOI: 10.5858/arpa.2019-0058-ra] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
CONTEXT.— The rapid evolution of optical imaging modalities in recent years has opened the opportunity for ex vivo tissue imaging, which has significant implications for surgical pathology practice. These modalities have promising potential to be used as next-generation digital microscopy tools for examination of fresh tissue, with or without labeling with contrast agents. OBJECTIVE.— To review the literature regarding various types of ex vivo optical imaging platforms that can generate digital images for tissue recognition with potential for utilization in anatomic pathology clinical practices. DATA SOURCES.— Literature relevant to ex vivo tissue imaging obtained from the PubMed database. CONCLUSIONS.— Ex vivo imaging of tissues can be performed by using various types of optical imaging techniques. These next-generation digital microscopy tools have a promising potential for utilization in surgical pathology practice.
Collapse
Affiliation(s)
- Savitri Krishnamurthy
- From the Department of Pathology and Laboratory Medicine, The University of Texas, MD Anderson Cancer Center, Houston (Dr Krishnamurthy); Biomedical Engineering, Tulane University, New Orleans, Louisiana (Dr Brown); Physical Sciences Inc, Andover, Massachusetts (Dr Iftimia); the Department of Pathology and Laboratory Medicine, University of California Davis, Davis (Dr Levenson); and Dermatology Section, Memorial Sloan Kettering Cancer Center, New York, New York (Dr Rajadhyaksha)
| | - Jonathan Quincy Brown
- From the Department of Pathology and Laboratory Medicine, The University of Texas, MD Anderson Cancer Center, Houston (Dr Krishnamurthy); Biomedical Engineering, Tulane University, New Orleans, Louisiana (Dr Brown); Physical Sciences Inc, Andover, Massachusetts (Dr Iftimia); the Department of Pathology and Laboratory Medicine, University of California Davis, Davis (Dr Levenson); and Dermatology Section, Memorial Sloan Kettering Cancer Center, New York, New York (Dr Rajadhyaksha)
| | - Nicusor Iftimia
- From the Department of Pathology and Laboratory Medicine, The University of Texas, MD Anderson Cancer Center, Houston (Dr Krishnamurthy); Biomedical Engineering, Tulane University, New Orleans, Louisiana (Dr Brown); Physical Sciences Inc, Andover, Massachusetts (Dr Iftimia); the Department of Pathology and Laboratory Medicine, University of California Davis, Davis (Dr Levenson); and Dermatology Section, Memorial Sloan Kettering Cancer Center, New York, New York (Dr Rajadhyaksha)
| | - Richard M Levenson
- From the Department of Pathology and Laboratory Medicine, The University of Texas, MD Anderson Cancer Center, Houston (Dr Krishnamurthy); Biomedical Engineering, Tulane University, New Orleans, Louisiana (Dr Brown); Physical Sciences Inc, Andover, Massachusetts (Dr Iftimia); the Department of Pathology and Laboratory Medicine, University of California Davis, Davis (Dr Levenson); and Dermatology Section, Memorial Sloan Kettering Cancer Center, New York, New York (Dr Rajadhyaksha)
| | - Milind Rajadhyaksha
- From the Department of Pathology and Laboratory Medicine, The University of Texas, MD Anderson Cancer Center, Houston (Dr Krishnamurthy); Biomedical Engineering, Tulane University, New Orleans, Louisiana (Dr Brown); Physical Sciences Inc, Andover, Massachusetts (Dr Iftimia); the Department of Pathology and Laboratory Medicine, University of California Davis, Davis (Dr Levenson); and Dermatology Section, Memorial Sloan Kettering Cancer Center, New York, New York (Dr Rajadhyaksha)
| |
Collapse
|
27
|
Light sheet microscopy for histopathology applications. Biomed Eng Lett 2019; 9:279-291. [PMID: 31456889 DOI: 10.1007/s13534-019-00122-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 06/21/2019] [Accepted: 07/15/2019] [Indexed: 12/27/2022] Open
Abstract
Light sheet microscopy (LSM) is an evolving optical imaging technique with a plane illumination for optical sectioning and volumetric imaging spanning cell biology, embryology, and in vivo live imaging. Here, we focus on emerging biomedical applications of LSM for tissue samples. Decoupling of the light sheet illumination from detection enables high-speed and large field-of-view imaging with minimal photobleaching and phototoxicity. These unique characteristics of the LSM technique can be easily adapted and potentially replace conventional histopathological procedures. In this review, we cover LSM technology from its inception to its most advanced technology; in particular, we highlight the human histopathological imaging applications to demonstrate LSM's rapid diagnostic ability in comparison with conventional histopathological procedures. We anticipate that the LSM technique can become a useful three-dimensional imaging tool for assessing human biopsies in the near future.
Collapse
|
28
|
Fernandez E, Marull‐Tufeu S. 3D imaging of human epidermis micromorphology by combining fluorescent dye, optical clearing and confocal microscopy. Skin Res Technol 2019; 25:735-742. [DOI: 10.1111/srt.12710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 04/14/2019] [Indexed: 01/21/2023]
Affiliation(s)
- Eric Fernandez
- Yves Rocher – Direction Innovation & Développement – Laboratoire Application Cutanée Issy les Moulineaux France
| | - Sylvie Marull‐Tufeu
- Yves Rocher – Direction Innovation & Développement – Laboratoire Application Cutanée Issy les Moulineaux France
| |
Collapse
|
29
|
Liu Y, Walker E, Iyer SR, Biro M, Kim I, Zhou B, Straight B, Bogyo M, Basilion JP, Popkin DL, Wilson DL. Molecular imaging and validation of margins in surgically excised nonmelanoma skin cancer specimens. J Med Imaging (Bellingham) 2019; 6:016001. [PMID: 30915384 DOI: 10.1117/1.jmi.6.1.016001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Accepted: 03/01/2019] [Indexed: 02/05/2023] Open
Abstract
In an effort to increase the efficiency and cure rate of nonmelanoma skin cancer (NMSC) excisions, we have developed a point-of-care method of imaging and evaluation of skin cancer margins. We evaluate the skin surgical specimens using a smart, near-infrared probe (6qcNIR) that fluoresces in the presence of cathepsin proteases overexpressed in NMSC. Imaging is done with an inverted, flying-spot fluorescence scanner that reduces scatter, giving a 70% improved step response as compared to a conventional imaging system. We develop a scheme for careful comparison of fluorescent signals to histological annotation, which involves image segmentation, fiducial-based registration, and nonrigid free-form deformation on fluorescence images, corresponding color images, "bread-loafed" tissue images, hematoxylin and eosin (H&E)-stained slides, and pathological annotations. From epidermal landmarks, spatial accuracy in the bulk of the sample is ∼ 500 μ m , which when extrapolated with a linear stretch model, suggests an error at the margin of ∼ 100 μ m , within clinical reporting standards. Cancer annotations on H&E slides are transformed and superimposed on the fluorescence images to generate the final results. Using this methodology, fluorescence cancer signals are generally found to correspond spatially with histological annotations. This method will allow us to accurately analyze molecular probes for imaging skin cancer margins.
Collapse
Affiliation(s)
- Yiqiao Liu
- Case Western Reserve University, Department of Biomedical Engineering, Cleveland, Ohio, United States
| | - Ethan Walker
- Case Western Reserve University, Department of Biomedical Engineering, Cleveland, Ohio, United States
| | - Sukanya Raj Iyer
- Case Western Reserve University, Department of Biomedical Engineering, Cleveland, Ohio, United States
| | - Mark Biro
- Case Western Reserve University, School of Medicine, Cleveland, Ohio, United States
| | - InYoung Kim
- Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio, United States
| | - Bo Zhou
- Case Western Reserve University, Department of Biomedical Engineering, Cleveland, Ohio, United States
| | - Brian Straight
- Akrotome Imaging Inc., BioEnterprise, Cleveland, Ohio, United States
| | - Matthew Bogyo
- Stanford University, Department of Pathology, Stanford, California, United States.,Stanford University, Department of Microbiology and Immunology, Stanford, California, United States
| | - James P Basilion
- Case Western Reserve University, Department of Biomedical Engineering, Cleveland, Ohio, United States.,Case Western Reserve University, Department of Radiology, Cleveland, Ohio, United States.,Case Western Reserve University, Fellow, National Foundation for Cancer Research, Cleveland, Ohio, United States
| | - Daniel L Popkin
- Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, Ohio, United States.,Case Western Reserve University, Department of Dermatology, Cleveland, Ohio, United States
| | - David L Wilson
- Case Western Reserve University, Department of Biomedical Engineering, Cleveland, Ohio, United States.,Case Western Reserve University, Department of Radiology, Cleveland, Ohio, United States
| |
Collapse
|