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Urbanska M, Guck J. Single-Cell Mechanics: Structural Determinants and Functional Relevance. Annu Rev Biophys 2024; 53:367-395. [PMID: 38382116 DOI: 10.1146/annurev-biophys-030822-030629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
The mechanical phenotype of a cell determines its ability to deform under force and is therefore relevant to cellular functions that require changes in cell shape, such as migration or circulation through the microvasculature. On the practical level, the mechanical phenotype can be used as a global readout of the cell's functional state, a marker for disease diagnostics, or an input for tissue modeling. We focus our review on the current knowledge of structural components that contribute to the determination of the cellular mechanical properties and highlight the physiological processes in which the mechanical phenotype of the cells is of critical relevance. The ongoing efforts to understand how to efficiently measure and control the mechanical properties of cells will define the progress in the field and drive mechanical phenotyping toward clinical applications.
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Affiliation(s)
- Marta Urbanska
- Max Planck Institute for the Science of Light, Erlangen, Germany; ,
- Max-Planck-Zentrum für Physik und Medizin, Erlangen, Germany
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
| | - Jochen Guck
- Max Planck Institute for the Science of Light, Erlangen, Germany; ,
- Max-Planck-Zentrum für Physik und Medizin, Erlangen, Germany
- Department of Physics, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
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2
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Beaver D, Limnios IJ. A treatment within sight: challenges in the development of stem cell-derived photoreceptor therapies for retinal degenerative diseases. FRONTIERS IN TRANSPLANTATION 2023; 2:1130086. [PMID: 38993872 PMCID: PMC11235385 DOI: 10.3389/frtra.2023.1130086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 09/07/2023] [Indexed: 07/13/2024]
Abstract
Stem cell therapies can potentially treat various retinal degenerative diseases, including age-related macular degeneration (AMD) and inherited retinal diseases like retinitis pigmentosa. For these diseases, transplanted cells may include stem cell-derived retinal pigmented epithelial (RPE) cells, photoreceptors, or a combination of both. Although stem cell-derived RPE cells have progressed to human clinical trials, therapies using photoreceptors and other retinal cell types are lagging. In this review, we discuss the potential use of human pluripotent stem cell (hPSC)-derived photoreceptors for the treatment of retinal degeneration and highlight the progress and challenges for their efficient production and clinical application in regenerative medicine.
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Affiliation(s)
- Davinia Beaver
- Clem Jones Centre for Regenerative Medicine, Bond University, Gold Coast, QL, Australia
| | - Ioannis Jason Limnios
- Clem Jones Centre for Regenerative Medicine, Bond University, Gold Coast, QL, Australia
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3
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Bose B, Nihad M, P SS. Pluripotent stem cells: Basic biology or else differentiations aimed at translational research and the role of flow cytometry. Cytometry A 2023; 103:368-377. [PMID: 36918734 DOI: 10.1002/cyto.a.24726] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/19/2023] [Accepted: 02/25/2023] [Indexed: 03/16/2023]
Abstract
Pluripotent stem cell research has revolutionized the modern era for the past 14 years with the advent of induced pluripotent stem cells. Before this time, scientists had access to human and mouse embryonic stem cells primarily for basic research and an attempt towards lineage-specific differentiations for cell therapy applications. Regarding pluripotent stem cells, expression of bonafide marker proteins such as Oct4, Nanog, Sox2, Klf4, c-Myc, and Lin28 have been considered giving a perfect readout for pluripotent stem cells and assessed using an analytical flow cytometer. In addition to the intracellular markers, surface markers such as stage-specific embryonic antigen-1 for mouse cells and SSEA-4 for human cells are needed to sort pure populations of stem cells for further downstream applications for cell therapy. The surface marker SSEA-4 is the most appropriate for obtaining pure populations of human pluripotent stem cells. When differentiated in a controlled manner using growth factors or small molecules, it is mandatory to assess the downregulation of pluripotency markers (Oct4, Nanog, Sox2, and Klf4) with subsequent up-regulation of stage-specific differentiation markers. Such assessments are done using flow cytometry. Pluripotent stem cells have a high teratoma-forming potential in vivo. Small amounts of undifferentiated PSCs might lead to dangerous teratomas upon transplantation if leftover in the pool of differentiated cells. Hence, flow cytometry is essential for sorting out PSC populations with teratoma-forming potential. The pure populations of differentiated progenitors need to be flow-sorted before differentiating them further for cell therapy applications. For example, Glycoprotein 2 is a specific cell-surface marker for pancreatic progenitors that enables one to sort the pancreatic progenitors differentiated from human PSCs. Taken together, analytical flow cytometry, and cell sorting provide indispensable tools in PSC research and cell therapy.
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Affiliation(s)
- Bipasha Bose
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka, India
| | - Muhammad Nihad
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka, India
| | - Sudheer Shenoy P
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya (Deemed to be University), Mangalore, Karnataka, India
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4
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Li Z, Jiang Z, Lu L, Liu Y. Microfluidic Manipulation for Biomedical Applications in the Central and Peripheral Nervous Systems. Pharmaceutics 2023; 15:pharmaceutics15010210. [PMID: 36678839 PMCID: PMC9862045 DOI: 10.3390/pharmaceutics15010210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 01/04/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Physical injuries and neurodegenerative diseases often lead to irreversible damage to the organizational structure of the central nervous system (CNS) and peripheral nervous system (PNS), culminating in physiological malfunctions. Investigating these complex and diverse biological processes at the macro and micro levels will help to identify the cellular and molecular mechanisms associated with nerve degeneration and regeneration, thereby providing new options for the development of new therapeutic strategies for the functional recovery of the nervous system. Due to their distinct advantages, modern microfluidic platforms have significant potential for high-throughput cell and organoid cultures in vitro, the synthesis of a variety of tissue engineering scaffolds and drug carriers, and observing the delivery of drugs at the desired speed to the desired location in real time. In this review, we first introduce the types of nerve damage and the repair mechanisms of the CNS and PNS; then, we summarize the development of microfluidic platforms and their application in drug carriers. We also describe a variety of damage models, tissue engineering scaffolds, and drug carriers for nerve injury repair based on the application of microfluidic platforms. Finally, we discuss remaining challenges and future perspectives with regard to the promotion of nerve injury repair based on engineered microfluidic platform technology.
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5
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Habibey R, Rojo Arias JE, Striebel J, Busskamp V. Microfluidics for Neuronal Cell and Circuit Engineering. Chem Rev 2022; 122:14842-14880. [PMID: 36070858 PMCID: PMC9523714 DOI: 10.1021/acs.chemrev.2c00212] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Indexed: 02/07/2023]
Abstract
The widespread adoption of microfluidic devices among the neuroscience and neurobiology communities has enabled addressing a broad range of questions at the molecular, cellular, circuit, and system levels. Here, we review biomedical engineering approaches that harness the power of microfluidics for bottom-up generation of neuronal cell types and for the assembly and analysis of neural circuits. Microfluidics-based approaches are instrumental to generate the knowledge necessary for the derivation of diverse neuronal cell types from human pluripotent stem cells, as they enable the isolation and subsequent examination of individual neurons of interest. Moreover, microfluidic devices allow to engineer neural circuits with specific orientations and directionality by providing control over neuronal cell polarity and permitting the isolation of axons in individual microchannels. Similarly, the use of microfluidic chips enables the construction not only of 2D but also of 3D brain, retinal, and peripheral nervous system model circuits. Such brain-on-a-chip and organoid-on-a-chip technologies are promising platforms for studying these organs as they closely recapitulate some aspects of in vivo biological processes. Microfluidic 3D neuronal models, together with 2D in vitro systems, are widely used in many applications ranging from drug development and toxicology studies to neurological disease modeling and personalized medicine. Altogether, microfluidics provide researchers with powerful systems that complement and partially replace animal models.
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Affiliation(s)
- Rouhollah Habibey
- Department
of Ophthalmology, Universitäts-Augenklinik
Bonn, University of Bonn, Ernst-Abbe-Straße 2, D-53127 Bonn, Germany
| | - Jesús Eduardo Rojo Arias
- Wellcome—MRC
Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, Cambridge
Biomedical Campus, University of Cambridge, Cambridge CB2 0AW, United Kingdom
| | - Johannes Striebel
- Department
of Ophthalmology, Universitäts-Augenklinik
Bonn, University of Bonn, Ernst-Abbe-Straße 2, D-53127 Bonn, Germany
| | - Volker Busskamp
- Department
of Ophthalmology, Universitäts-Augenklinik
Bonn, University of Bonn, Ernst-Abbe-Straße 2, D-53127 Bonn, Germany
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6
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Herbig M, Tessmer K, Nötzel M, Nawaz AA, Santos-Ferreira T, Borsch O, Gasparini SJ, Guck J, Ader M. Label-free imaging flow cytometry for analysis and sorting of enzymatically dissociated tissues. Sci Rep 2022; 12:963. [PMID: 35046492 PMCID: PMC8770577 DOI: 10.1038/s41598-022-05007-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 01/05/2022] [Indexed: 01/07/2023] Open
Abstract
Biomedical research relies on identification and isolation of specific cell types using molecular biomarkers and sorting methods such as fluorescence or magnetic activated cell sorting. Labelling processes potentially alter the cells’ properties and should be avoided, especially when purifying cells for clinical applications. A promising alternative is the label-free identification of cells based on physical properties. Sorting real-time deformability cytometry (soRT-DC) is a microfluidic technique for label-free analysis and sorting of single cells. In soRT-FDC, bright-field images of cells are analyzed by a deep neural net (DNN) to obtain a sorting decision, but sorting was so far only demonstrated for blood cells which show clear morphological differences and are naturally in suspension. Most cells, however, grow in tissues, requiring dissociation before cell sorting which is associated with challenges including changes in morphology, or presence of aggregates. Here, we introduce methods to improve robustness of analysis and sorting of single cells from nervous tissue and provide DNNs which can distinguish visually similar cells. We employ the DNN for image-based sorting to enrich photoreceptor cells from dissociated retina for transplantation into the mouse eye.
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Affiliation(s)
- Maik Herbig
- Biotechnology Center, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany.,Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany
| | - Karen Tessmer
- Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany
| | - Martin Nötzel
- Biotechnology Center, Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany
| | - Ahsan Ahmad Nawaz
- Max Planck Institute for the Science of Light & Max-Planck-Zentrum Für Physik Und Medizin, Erlangen, Germany
| | - Tiago Santos-Ferreira
- Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany.,Roche Innovation Center Basel, F. Hoffman-La Roche Ltd., Basel, Switzerland
| | - Oliver Borsch
- Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany
| | - Sylvia J Gasparini
- Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany
| | - Jochen Guck
- Max Planck Institute for the Science of Light & Max-Planck-Zentrum Für Physik Und Medizin, Erlangen, Germany
| | - Marius Ader
- Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering, Technische Universität Dresden, Dresden, Germany.
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7
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Zhang X, Wang W, Jin ZB. Retinal organoids as models for development and diseases. CELL REGENERATION (LONDON, ENGLAND) 2021; 10:33. [PMID: 34719743 PMCID: PMC8557999 DOI: 10.1186/s13619-021-00097-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 09/22/2021] [Indexed: 12/12/2022]
Abstract
The evolution of pluripotent stem cell-derived retinal organoids (ROs) has brought remarkable opportunities for developmental studies while also presenting new therapeutic avenues for retinal diseases. With a clear understanding of how well these models mimic native retinas, such preclinical models may be crucial tools that are widely used for the more efficient translation of studies into novel treatment strategies for retinal diseases. Genetic modifications or patient-derived ROs can allow these models to simulate the physical microenvironments of the actual disease process. However, we are currently at the beginning of the three-dimensional (3D) RO era, and a general quantitative technology for analyzing ROs derived from numerous differentiation protocols is still missing. Continued efforts to improve the efficiency and stability of differentiation, as well as understanding the disparity between the artificial retina and the native retina and advancing the current treatment strategies, will be essential in ensuring that these scientific advances can benefit patients with retinal disease. Herein, we briefly discuss RO differentiation protocols, the current applications of RO as a disease model and the treatments for retinal diseases by using RO modeling, to have a clear view of the role of current ROs in retinal development and diseases.
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Affiliation(s)
- Xiao Zhang
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Science Key Laboratory, Beijing, 100730, China
| | - Wen Wang
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Science Key Laboratory, Beijing, 100730, China
| | - Zi-Bing Jin
- Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Science Key Laboratory, Beijing, 100730, China.
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8
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Völkner M, Kurth T, Schor J, Ebner LJA, Bardtke L, Kavak C, Hackermüller J, Karl MO. Mouse Retinal Organoid Growth and Maintenance in Longer-Term Culture. Front Cell Dev Biol 2021; 9:645704. [PMID: 33996806 PMCID: PMC8114082 DOI: 10.3389/fcell.2021.645704] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/11/2021] [Indexed: 12/14/2022] Open
Abstract
Using retinal organoid systems, organ-like 3D tissues, relies implicitly on their robustness. However, essential key parameters, particularly retinal growth and longer-term culture, are still insufficiently defined. Here, we hypothesize that a previously optimized protocol for high yield of evenly-sized mouse retinal organoids with low variability facilitates assessment of such parameters. We demonstrate that these organoids reliably complete retinogenesis, and can be maintained at least up to 60 days in culture. During this time, the organoids continue to mature on a molecular and (ultra)structural level: They develop photoreceptor outer segments and synapses, transiently maintain its cell composition for about 5-10 days after completing retinogenesis, and subsequently develop pathologic changes - mainly of the inner but also outer retina and reactive gliosis. To test whether this organoid system provides experimental access to the retina during and upon completion of development, we defined and stimulated organoid growth by activating sonic hedgehog signaling, which in patients and mice in vivo with a congenital defect leads to enlarged eyes. Here, a sonic hedgehog signaling activator increased retinal epithelia length in the organoid system when applied during but not after completion of development. This experimentally supports organoid maturation, stability, and experimental reproducibility in this organoid system, and provides a potential enlarged retina pathology model, as well as a protocol for producing larger organoids. Together, our study advances the understanding of retinal growth, maturation, and maintenance, and further optimizes the organoid system for future utilization.
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Affiliation(s)
- Manuela Völkner
- German Center for Neurodegenerative Diseases (DZNE) Dresden, Dresden, Germany
| | - Thomas Kurth
- Center for Molecular and Cellular Bioengineering, Technology Platform, Electron Microscopy and Histology Facility, Technische Universität Dresden, Dresden, Germany
| | - Jana Schor
- Young Investigators Group Bioinformatics and Transcriptomics, Department Molecular Systems Biology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Lynn J A Ebner
- German Center for Neurodegenerative Diseases (DZNE) Dresden, Dresden, Germany
| | - Lara Bardtke
- German Center for Neurodegenerative Diseases (DZNE) Dresden, Dresden, Germany
| | - Cagri Kavak
- German Center for Neurodegenerative Diseases (DZNE) Dresden, Dresden, Germany
| | - Jörg Hackermüller
- Young Investigators Group Bioinformatics and Transcriptomics, Department Molecular Systems Biology, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany
| | - Mike O Karl
- German Center for Neurodegenerative Diseases (DZNE) Dresden, Dresden, Germany.,CRTD - Center for Regenerative Therapies Dresden, Technische Universität Dresden, Dresden, Germany
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9
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Tavassoli H, Rorimpandey P, Kang YC, Carnell M, Brownlee C, Pimanda JE, Chan PPY, Chandrakanthan V. Label-Free Isolation and Single Cell Biophysical Phenotyping Analysis of Primary Cardiomyocytes Using Inertial Microfluidics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2006176. [PMID: 33369875 DOI: 10.1002/smll.202006176] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 11/23/2020] [Indexed: 06/12/2023]
Abstract
To advance the understanding of cardiomyocyte (CM) identity and function, appropriate tools to isolate pure primary CMs are needed. A label-free method to purify viable CMs from mouse neonatal hearts is developed using a simple particle size-based inertial microfluidics biochip achieving purities of over 90%. Purified CMs are viable and retained their identity and function as depicted by the expression of cardiac-specific markers and contractility. The physico-mechanical properties of sorted cells are evaluated using downstream real-time deformability cytometry. CMs exhibited different physico-mechanical properties when compared with non-CMs. Taken together, this CM isolation and phenotyping method could serve as a valuable tool to progress the understanding of CM identity and function, and ultimately benefit cell therapy and diagnostic applications.
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Affiliation(s)
- Hossein Tavassoli
- Department of Telecommunications, Electrical, Robotics and Biomedical Engineering, Swinburne University of Technology, Hawthorn, Victoria, 3122, Australia
- Department of Pathology, School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- Adult Cancer Program, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Prunella Rorimpandey
- Department of Pathology, School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- Adult Cancer Program, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Young Chan Kang
- Department of Pathology, School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- Adult Cancer Program, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Michael Carnell
- Biomedical Imaging Facility, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Chris Brownlee
- Flow Cytometry Facility, Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW, 2052, Australia
| | - John E Pimanda
- Department of Pathology, School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- Adult Cancer Program, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
- Prince of Wales Clinical School, University of New South Wales, Sydney, NSW, 2052, Australia
- Department of Haematology, Prince of Wales Hospital, Sydney, NSW, 2052, Australia
| | - Peggy P Y Chan
- Department of Telecommunications, Electrical, Robotics and Biomedical Engineering, Swinburne University of Technology, Hawthorn, Victoria, 3122, Australia
| | - Vashe Chandrakanthan
- Department of Pathology, School of Medical Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- Adult Cancer Program, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
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