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Pandey A, Nowakowski P, Ureña Martin C, Abu Ahmad M, Edri A, Toledo E, Tzadka S, Walther J, Le Saux G, Porgador A, Smith AS, Schvartzman M. Membrane Fluctuation Model for Understanding the Effect of Receptor Nanoclustering on the Activation of Natural Killer Cells through Biomechanical Feedback. NANO LETTERS 2024; 24:5395-5402. [PMID: 38684070 DOI: 10.1021/acs.nanolett.3c02815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
We investigated the role of ligand clustering and density in the activation of natural killer (NK) cells. To that end, we designed reductionist arrays of nanopatterned ligands arranged with different cluster geometries and densities and probed their effects on NK cell activation. We used these arrays as an artificial microenvironment for the stimulation of NK cells and studied the effect of the array geometry on the NK cell immune response. We found that ligand density significantly regulated NK cell activation while ligand clustering had an impact only at a specific density threshold. We also rationalized these findings by introducing a theoretical membrane fluctuation model that considers biomechanical feedback between ligand-receptor bonds and the cell membrane. These findings provide important insight into NK cell mechanobiology, which is fundamentally important and essential for designing immunotherapeutic strategies targeting cancer.
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Affiliation(s)
- Ashish Pandey
- Department of Materials Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Piotr Nowakowski
- Group for Computational Life Sciences, Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Carlos Ureña Martin
- Department of Materials Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Muhammad Abu Ahmad
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Avishay Edri
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Esti Toledo
- Department of Materials Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Sivan Tzadka
- Department of Materials Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Jonas Walther
- PULS Group, Institut für Theoretische Physik, IZNF, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - Guillaume Le Saux
- Department of Materials Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Angel Porgador
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
| | - Ana-Sunčana Smith
- Group for Computational Life Sciences, Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
- PULS Group, Institut für Theoretische Physik, IZNF, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - Mark Schvartzman
- Department of Materials Engineering, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
- Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva 84105, Israel
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Toledo E, Iraqi M, Pandey A, Tzadka S, Le Saux G, Porgador A, Schvartzman M. Multifunctional Nanoscale Platform for the Study of T Cell Receptor Segregation. ACS OMEGA 2023; 8:28968-28975. [PMID: 37599975 PMCID: PMC10433356 DOI: 10.1021/acsomega.2c08194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 05/10/2023] [Indexed: 08/22/2023]
Abstract
T cells respond not only to biochemical stimuli transmitted through their activating, costimulatory, and inhibitory receptors but also to biophysical aspects of their environment, including the receptors' spatial arrangement. While these receptors form nanoclusters that can either colocalize or segregate, the roles of these colocalization and segregation remain unclear. Deciphering these roles requires a nanoscale platform with independent and simultaneous spatial control of multiple types of receptors. Herein, using a straightforward and modular fabrication process, we engineered a tunable nanoscale chip used as a platform for T cell stimulation, allowing spatial control over the clustering and segregation of activating, costimulatory, and inhibitory receptors. Using this platform, we showed that, upon blocked inhibition, cells became sensitive to changes in the nanoscale ligand configuration. The nanofabrication methodology described here opens a pathway to numerous studies, which will produce an important insight into the molecular mechanism of T cell activation. This insight is essential for the fundamental understanding of our immune system as well as for the rational design of future immunotherapies.
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Affiliation(s)
- Esti Toledo
- Department
of Materials Engineering, Ben-Gurion University
of the Negev, Beer-Sheva 8410501, Israel
- Ilse
Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Muhammed Iraqi
- The
Shraga Segal Department of Microbiology, Immunology, and Genetics,
Faculty of Health Science, Ben-Gurion University
of the Negev, Beer-Sheva 8410501, Israel
| | - Ashish Pandey
- Department
of Materials Engineering, Ben-Gurion University
of the Negev, Beer-Sheva 8410501, Israel
- Ilse
Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Sivan Tzadka
- Department
of Materials Engineering, Ben-Gurion University
of the Negev, Beer-Sheva 8410501, Israel
- Ilse
Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Guillaume Le Saux
- Department
of Materials Engineering, Ben-Gurion University
of the Negev, Beer-Sheva 8410501, Israel
- Ilse
Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Angel Porgador
- The
Shraga Segal Department of Microbiology, Immunology, and Genetics,
Faculty of Health Science, Ben-Gurion University
of the Negev, Beer-Sheva 8410501, Israel
| | - Mark Schvartzman
- Department
of Materials Engineering, Ben-Gurion University
of the Negev, Beer-Sheva 8410501, Israel
- Ilse
Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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Le Saux G, Toledo-Ashkenazi E, Schvartzman M. Fabrication of Nanoscale Arrays to Study the Effect of Ligand Arrangement on Inhibitory Signaling in NK Cells. Methods Mol Biol 2023; 2654:313-325. [PMID: 37106191 DOI: 10.1007/978-1-0716-3135-5_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
Molecular scale nanopatterns of bioactive molecules have been used to study the effect of transmembrane receptor arrangement on a variety of cell types, including immune cells and their immune response in particular. However, state-of-the-art fabrication approaches have thus far enabled the production of patterns with control over one receptor type only. Herein, we describe a protocol to fabricate arrays for the molecular scale control of the segregation between activating and inhibitory receptors in NK cells. We used this platform to study how ligand segregation regulates NK cell inhibitory signaling and function. The arrays are based on patterns of nanodots of two metals, selectively functionalized with activating and inhibitory ligands. Due to the versatility of our functionalization approach, this protocol can be applied to configurate virtually any combination of extracellular ligands into controlled multifunctional arrays.
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Affiliation(s)
- Guillaume Le Saux
- Department of Materials Engineering, Isle Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Esti Toledo-Ashkenazi
- Department of Materials Engineering, Isle Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Mark Schvartzman
- Department of Materials Engineering, Isle Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
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Toledo E, Le Saux G, Edri A, Li L, Rosenberg M, Keidar Y, Bhingardive V, Radinsky O, Hadad U, Di Primo C, Buffeteau T, Smith AS, Porgador A, Schvartzman M. Molecular-scale spatio-chemical control of the activating-inhibitory signal integration in NK cells. SCIENCE ADVANCES 2021; 7:7/24/eabc1640. [PMID: 34117052 PMCID: PMC8195486 DOI: 10.1126/sciadv.abc1640] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 04/21/2021] [Indexed: 05/13/2023]
Abstract
The role of juxtaposition of activating and inhibitory receptors in signal inhibition of cytotoxic lymphocytes remains strongly debated. The challenge lies in the lack of tools that allow simultaneous spatial manipulation of signaling molecules. To circumvent this, we produced a nanoengineered multifunctional platform with molecular-scale spatial control of ligands, which was applied to elucidate KIR2DL1-mediated inhibition of NKG2D signaling-receptors of natural killer cells. This platform was conceived by bimetallic nanodot patterning with molecular-scale registry, followed by a ternary functionalization with distinct moieties. We found that a 40-nm gap between activating and inhibitory ligands provided optimal inhibitory conditions. Supported by theoretical modeling, we interpret these findings as a consequence of the size mismatch and conformational flexibility of ligands in their spatial interaction. This highly versatile approach provides an important insight into the spatial mechanism of inhibitory immune checkpoints, which is essential for the rational design of future immunotherapies.
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Affiliation(s)
- Esti Toledo
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Guillaume Le Saux
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Avishay Edri
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Science, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Long Li
- Department of Physics, IZNF, FAU Erlangen-Nürnberg, Erlangen 91058, Germany
- Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Maor Rosenberg
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Yossi Keidar
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Viraj Bhingardive
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Olga Radinsky
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Science, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Uzi Hadad
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Carmelo Di Primo
- University of Bordeaux, INSERM U1212, UMR CNRS 5320, Institut Européen de Chimie et Biologie, 2 rue Robert Escarpit, 33607 Pessac, France
| | | | - Ana-Sunčana Smith
- Department of Physics, IZNF, FAU Erlangen-Nürnberg, Erlangen 91058, Germany
- Group for Computational Life Sciences, Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, Zagreb 10000, Croatia
| | - Angel Porgador
- The Shraga Segal Department of Microbiology, Immunology, and Genetics, Faculty of Health Science, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Mark Schvartzman
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel.
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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Mordechay L, Le Saux G, Edri A, Hadad U, Porgador A, Schvartzman M. Mechanical Regulation of the Cytotoxic Activity of Natural Killer Cells. ACS Biomater Sci Eng 2020; 7:122-132. [DOI: 10.1021/acsbiomaterials.0c01121] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Lital Mordechay
- Department of Materials Engineering, Ben-Gurion University of the Negev, 84105 Beer Sheva, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, 84105 Beer Sheva, Israel
| | - Guillaume Le Saux
- Department of Materials Engineering, Ben-Gurion University of the Negev, 84105 Beer Sheva, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, 84105 Beer Sheva, Israel
| | - Avishay Edri
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, 84105 Beer Sheva, Israel
| | - Uzi Hadad
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, 84105 Beer Sheva, Israel
| | - Angel Porgador
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, 84105 Beer Sheva, Israel
| | - Mark Schvartzman
- Department of Materials Engineering, Ben-Gurion University of the Negev, 84105 Beer Sheva, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, 84105 Beer Sheva, Israel
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Hawkes W, Huang D, Reynolds P, Hammond L, Ward M, Gadegaard N, Marshall JF, Iskratsch T, Palma M. Probing the nanoscale organisation and multivalency of cell surface receptors: DNA origami nanoarrays for cellular studies with single-molecule control. Faraday Discuss 2020; 219:203-219. [PMID: 31314021 DOI: 10.1039/c9fd00023b] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Nanoscale organisation of receptor ligands has become an important approach to study the clustering behaviour of cell-surface receptors. Biomimetic substrates fabricated via different nanopatterning strategies have so far been applied to investigate specific integrins and cell types, but without multivalent control. Here we use DNA origami to surpass the limits of current approaches and fabricate nanoarrays to study different cell adhesion processes, with nanoscale spatial resolution and single-molecule control. Notably, DNA nanostructures enable the display of receptor ligands in a highly customisable manner, with modifiable parameters including ligand number, ligand spacing and most importantly, multivalency. To test the adaptability and robustness of the system we combined it with focused ion beam and electron-beam lithography nanopatterning to additionally control the distance between the origami structures (i.e. receptor clusters). Moreover, we demonstrate how the platform can be used to interrogate two different biological questions: (1) the cooperative effect of integrin and growth factor receptor in cancer cell spreading, and (2) the role of integrin clustering in cardiomyocyte adhesion and maturation. Thereby we find previously unknown clustering behaviour of different integrins, further outlining the importance for such customisable platforms for future investigations of specific receptor organisation at the nanoscale.
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Affiliation(s)
- William Hawkes
- Randall Centre of Cell and Molecular Biophysics, King's College London, UK
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Le Saux G, Wu MC, Toledo E, Chen YQ, Fan YJ, Kuo JC, Schvartzman M. Cell-Cell Adhesion-Driven Contact Guidance and Its Effect on Human Mesenchymal Stem Cell Differentiation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22399-22409. [PMID: 32323968 DOI: 10.1021/acsami.9b20939] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Contact guidance has been extensively explored using patterned adhesion functionalities that predominantly mimic cell-matrix interactions. Whether contact guidance can also be driven by other types of interactions, such as cell-cell adhesion, still remains a question. Herein, this query is addressed by engineering a set of microstrip patterns of (i) cell-cell adhesion ligands and (ii) segregated cell-cell and cell-matrix ligands as a simple yet versatile set of platforms for the guidance of spreading, adhesion, and differentiation of mesenchymal stem cells. It was unprecedently found that micropatterns of cell-cell adhesion ligands can induce contact guidance. Surprisingly, it was found that patterns of alternating cell-matrix and cell-cell strips also induce contact guidance despite providing a spatial continuum for cell adhesion. This guidance is believed to be due to the difference between the potencies of the two adhesions. Furthermore, patterns that combine the two segregated adhesion functionalities were shown to induce more human mesenchymal stem cell osteogenic differentiation than monofunctional patterns. This work provides new insight into the functional crosstalk between cell-cell and cell-matrix adhesions and, overall, further highlights the ubiquitous impact of the biochemical anisotropy of the extracellular environment on cell function.
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Affiliation(s)
- Guillaume Le Saux
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Isle Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Ming-Chung Wu
- Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei 11221, Taiwan
| | - Esti Toledo
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Isle Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Yin-Quan Chen
- Cancer Progression Research Center, National Yang-Ming University, Taipei 11221, Taiwan
| | - Yu-Jui Fan
- School of Biomedical Engineering, Taipei Medical University, Taipei 110, Taiwan
| | - Jean-Cheng Kuo
- Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei 11221, Taiwan
- Cancer Progression Research Center, National Yang-Ming University, Taipei 11221, Taiwan
| | - Mark Schvartzman
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
- Isle Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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Le Saux G, Schvartzman M. Advanced Materials and Devices for the Regulation and Study of NK Cells. Int J Mol Sci 2019; 20:E646. [PMID: 30717370 PMCID: PMC6386824 DOI: 10.3390/ijms20030646] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 01/24/2019] [Accepted: 01/29/2019] [Indexed: 02/07/2023] Open
Abstract
Natural Killer (NK) cells are innate lymphocytes that contribute to immune protection by cytosis, cytokine secretion, and regulation of adaptive responses of T cells. NK cells distinguish between healthy and ill cells, and generate a cytotoxic response, being cumulatively regulated by environmental signals delivered through their diverse receptors. Recent advances in biomaterials and device engineering paved the way to numerous artificial microenvironments for cells, which produce synthetic signals identical or similar to those provided by the physiological environment. In this paper, we review recent advances in materials and devices for artificial signaling, which have been applied to regulate NK cells, and systematically study the role of these signals in NK cell function.
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Affiliation(s)
- Guillaume Le Saux
- Department of Materials Engineering, Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel.
| | - Mark Schvartzman
- Department of Materials Engineering, Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel.
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Huang D, Patel K, Perez-Garrido S, Marshall JF, Palma M. DNA Origami Nanoarrays for Multivalent Investigations of Cancer Cell Spreading with Nanoscale Spatial Resolution and Single-Molecule Control. ACS NANO 2019; 13:728-736. [PMID: 30588806 DOI: 10.1021/acsnano.8b08010] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We present a strategy for the fabrication of biomimetic nanoarrays, based on the use of DNA origami, that permits the multivalent investigation of ligand-receptor molecule interactions in cancer cell spreading, with nanoscale spatial resolution and single-molecule control. We employed DNA origami to control the nanoscale spatial organization of integrin- and epidermal growth factor (EGF)-binding ligands that modulate epidermal cancer cell behavior. By organizing these multivalent DNA nanostructures in nanoarray configurations on nanopatterned surfaces, we demonstrated the cooperative behavior of integrin and EGF ligands in the spreading of human cutaneous melanoma cells: this cooperation was shown to depend on both the number and ratio of the selective ligands employed. Notably, the multivalent biochips we have developed allowed for this cooperative effect to be demonstrated with single-molecule control and nanoscale spatial resolution. By and large, the platform presented here is of general applicability for the study, with molecular control, of different multivalent interactions governing biological processes from the function of cell-surface receptors to protein-ligand binding and pathogen inhibition.
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Affiliation(s)
- Da Huang
- School of Biological and Chemical Sciences, Materials Research Institute, Institute of Bioengineering , Queen Mary University of London , Mile End Road , London E1 4NS , United Kingdom
| | - Ketan Patel
- Barts Cancer Institute, Cancer Research UK Centre of Excellence , Queen Mary University of London , Charterhouse Square , London EC1M 6BQ , United Kingdom
| | - Sandra Perez-Garrido
- School of Biological and Chemical Sciences, Materials Research Institute, Institute of Bioengineering , Queen Mary University of London , Mile End Road , London E1 4NS , United Kingdom
- Barts Cancer Institute, Cancer Research UK Centre of Excellence , Queen Mary University of London , Charterhouse Square , London EC1M 6BQ , United Kingdom
| | - John F Marshall
- Barts Cancer Institute, Cancer Research UK Centre of Excellence , Queen Mary University of London , Charterhouse Square , London EC1M 6BQ , United Kingdom
| | - Matteo Palma
- School of Biological and Chemical Sciences, Materials Research Institute, Institute of Bioengineering , Queen Mary University of London , Mile End Road , London E1 4NS , United Kingdom
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Keydar Y, Le Saux G, Pandey A, Avishay E, Bar-Hanin N, Esti T, Bhingardive V, Hadad U, Porgador A, Schvartzman M. Natural killer cells' immune response requires a minimal nanoscale distribution of activating antigens. NANOSCALE 2018; 10:14651-14659. [PMID: 30033475 DOI: 10.1039/c8nr04038a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
NK cells recognize cancer and viral cells by binding their activating receptors to antigens presenting on the membrane of target cells. Although the activation mechanism of NK cells is a subject of extensive research today, the role of the composition and spatial distribution of activating ligands in NK cell cytotoxicity is barely understood. In this work, we engineered a nanochip whose surface was patterned with matrices of antigens for NKG2D activating receptors. These matrices mimicked the spatial order of the surface of antigen presenting cells with molecular resolution. Using this chip, we elucidated the effect of the antigen spatial distribution on the NK cell spreading and immune activation. We found that the spatial distribution of the ligand within the 100 nm length-scale provides the minimal conditions for NKG2D regulated cell spreading. Furthermore, we found that the immune activation of NK cells requires the same minimal spatial distribution of activating ligands. Above this threshold, both spreading and activation plateaued, confirming that these two cell functions work hand in hand. Our study provides an important insight on the spatial mechanism of the cytotoxic activity of NK cells. This insight opens the way to rationally designed antitumor therapies that harness NK cytotoxicity.
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Affiliation(s)
- Yossi Keydar
- Department of Materials Engineering, Ben Gurion University of the Negev, Beer Sheva 84105, Israel.
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