1
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Jain K, Pandey A, Wang H, Chung T, Nemati A, Kanchanawong P, Sheetz MP, Cai H, Changede R. TiO 2 Nano-Biopatterning Reveals Optimal Ligand Presentation for Cell-Matrix Adhesion Formation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2309284. [PMID: 38340044 PMCID: PMC11126362 DOI: 10.1002/adma.202309284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 01/31/2024] [Indexed: 02/12/2024]
Abstract
Nanoscale organization of transmembrane receptors is critical for cellular functions, enabled by the nanoscale engineering of bioligand presentation. Previously, a spatial threshold of ≤60 nm for integrin binding ligands in cell-matrix adhesion is demonstrated using monoliganded gold nanoparticles. However, the ligand geometric arrangement is limited to hexagonal arrays of monoligands, while plasmonic quenching limits further investigation by fluorescence-based high-resolution imaging. Here, these limitations are overcome with dielectric TiO2 nanopatterns, eliminating fluorescence quenching, thus enabling super-resolution fluorescence microscopy on nanopatterns. By dual-color super-resolution imaging, high precision and consistency among nanopatterns, bioligands, and integrin nanoclusters are observed, validating the high quality and integrity of both nanopattern functionalization and passivation. By screening TiO2 nanodiscs with various diameters, an increase in fibroblast cell adhesion, spreading area, and Yes-associated protein (YAP) nuclear localization on 100 nm diameter compared with smaller diameters was observed. Focal adhesion kinase is identified as the regulatory signal. These findings explore the optimal ligand presentation when the minimal requirements are sufficiently fulfilled in the heterogenous extracellular matrix network of isolated binding regions with abundant ligands. Integration of high-fidelity nano-biopatterning with super-resolution imaging allows precise quantitative studies to address early signaling events in response to receptor clustering and their nanoscale organization.
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Affiliation(s)
- Kashish Jain
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
| | - Ashish Pandey
- Tech4Health Institute and Department of Radiology, NYU Langone Health, New York, NY, USA
| | - Hao Wang
- Tech4Health Institute and Department of Radiology, NYU Langone Health, New York, NY, USA
| | - Taerin Chung
- Tech4Health Institute and Department of Radiology, NYU Langone Health, New York, NY, USA
| | - Arash Nemati
- Tech4Health Institute and Department of Radiology, NYU Langone Health, New York, NY, USA
| | - Pakorn Kanchanawong
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
- Department of Biomedical Engineering, National University of Singapore, Singapore, Singapore
| | - Michael P. Sheetz
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
- Molecular Mechanomedicine Program, Biochemistry and Molecular Biology Department, University of Texas Medical Branch, Galveston, TX, USA
| | - Haogang Cai
- Tech4Health Institute and Department of Radiology, NYU Langone Health, New York, NY, USA
- Department of Biomedical Engineering, New York University, Brooklyn, NY, USA
| | - Rishita Changede
- Mechanobiology Institute, National University of Singapore, Singapore, Singapore
- TeOra Pte. Ltd, Singapore, Singapore
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2
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Aba G, Scheeren FA, Sharp TH. Design and Synthesis of DNA Origami Nanostructures to Control TNF Receptor Activation. Methods Mol Biol 2024; 2800:35-53. [PMID: 38709476 DOI: 10.1007/978-1-0716-3834-7_4] [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: 05/07/2024]
Abstract
Clustering of type II tumor necrosis factor (TNF) receptors (TNFRs) is essential for their activation, yet currently available drugs fail to activate signaling. Some strategies aim to cluster TNFR by using multivalent streptavidin or scaffolds based on dextran or graphene. However, these strategies do not allow for control of the valency or spatial organization of the ligands, and consequently control of the TNFR activation is not optimal. DNA origami nanostructures allow nanometer-precise control of the spatial organization of molecules and complexes, with defined spacing, number and valency. Here, we demonstrate the design and characterization of a DNA origami nanostructure that can be decorated with engineered single-chain TNF-related apoptosis-inducing ligand (SC-TRAIL) complexes, which show increased cell killing compared to SC-TRAIL alone on Jurkat cells. The information in this chapter can be used as a basis to decorate DNA origami nanostructures with various proteins, complexes, or other biomolecules.
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Affiliation(s)
- Göktuğ Aba
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - Ferenc A Scheeren
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - Thomas H Sharp
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden, The Netherlands.
- School of Biochemistry, University of Bristol, Bristol, UK.
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3
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Youn C, Pontaza C, Wang Y, Dikeman DA, Joyce DP, Alphonse MP, Wu MJ, Nolan SJ, Anany MA, Ahmadi M, Young J, Tocaj A, Garza LA, Wajant H, Miller LS, Archer NK. Neutrophil-intrinsic TNF receptor signaling orchestrates host defense against Staphylococcus aureus. SCIENCE ADVANCES 2023; 9:eadf8748. [PMID: 37327341 PMCID: PMC10275602 DOI: 10.1126/sciadv.adf8748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 05/11/2023] [Indexed: 06/18/2023]
Abstract
Staphylococcus aureus is the leading cause of skin and soft tissue infections and is a major health burden due to the emergence of antibiotic-resistant strains. To address the unmet need of alternative treatments to antibiotics, a better understanding of the protective immune mechanisms against S. aureus skin infection is warranted. Here, we report that tumor necrosis factor (TNF) promoted protection against S. aureus in the skin, which was mediated by bone marrow-derived immune cells. Furthermore, neutrophil-intrinsic TNF receptor (TNFR) signaling directed immunity against S. aureus skin infections. Mechanistically, TNFR1 promoted neutrophil recruitment to the skin, whereas TNFR2 prevented systemic bacterial dissemination and directed neutrophil antimicrobial functions. Treatment with a TNFR2 agonist showed therapeutic efficacy against S. aureus and Pseudomonas aeruginosa skin infections, which involved increased neutrophil extracellular trap formation. Our findings revealed nonredundant roles for TNFR1 and TNFR2 in neutrophils for immunity against S. aureus and can be therapeutically targeted for protection against bacterial skin infections.
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Affiliation(s)
- Christine Youn
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Cristina Pontaza
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Yu Wang
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Dustin A. Dikeman
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Daniel P. Joyce
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Martin P. Alphonse
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Meng-Jen Wu
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Sabrina J. Nolan
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Mohamed A. Anany
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg 97080, Germany
- Department of Microbial Biotechnology, Institute of Biotechnology, National Research Center, El Buhouth Street, Dokki, 12622 Giza, Egypt
| | - Michael Ahmadi
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Jeremy Young
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Aron Tocaj
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Luis A. Garza
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Harald Wajant
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg 97080, Germany
| | - Lloyd S. Miller
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
| | - Nathan K. Archer
- Department of Dermatology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD 21287, USA
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4
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Ma N, Cheng K, Feng Q, Liu G, Liang J, Ma X, Chen Z, Lu Y, Wang X, He W, Xu H, Wu S, Zou J, Shi Q, Nie G, Zhao X. Nanoscale Organization of TRAIL Trimers using DNA Origami to Promote Clustering of Death Receptor and Cancer Cell Apoptosis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206160. [PMID: 36890776 DOI: 10.1002/smll.202206160] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 01/19/2023] [Indexed: 06/08/2023]
Abstract
Through inducing death receptor (DR) clustering to activate downstream signaling, tumor necrosis factor related apoptosis inducing ligand (TRAIL) trimers trigger apoptosis of tumor cells. However, the poor agonistic activity of current TRAIL-based therapeutics limits their antitumor efficiency. The nanoscale spatial organization of TRAIL trimers at different interligand distances is still challenging, which is essential for the understanding of interaction pattern between TRAIL and DR. In this study, a flat rectangular DNA origami is employed as display scaffold, and an "engraving-printing" strategy is developed to rapidly decorate three TRAIL monomers onto its surface to form DNA-TRAIL3 trimer (DNA origami with surface decoration of three TRAIL monomers). With the spatial addressability of DNA origami, the interligand distances are precisely controlled from 15 to 60 nm. Through comparing the receptor affinity, agonistic activity and cytotoxicity of these DNA-TRAIL3 trimers, it is found that ≈40 nm is the critical interligand distance of DNA-TRAIL3 trimers to induce death receptor clustering and the resulting apoptosis.Finally, a hypothetical "active unit" model is proposed for the DR5 clustering induced by DNA-TRAIL3 trimers.
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Affiliation(s)
- Nana Ma
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Keman Cheng
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Qingqing Feng
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Guangna Liu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Jie Liang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Xiaotu Ma
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Zhiqiang Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Yichao Lu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Xinwei Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
| | - Wei He
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, Hubei, 430062, China
| | - Hu Xu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, Hubei, 430062, China
| | - Shan Wu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, Wuhan, Hubei, 430062, China
| | - Jiajia Zou
- Beijing Intell Nanomedicine, No. 9, Chengwan Street, Haidian District, Beijing, 100000, China
| | - Quanwei Shi
- Beijing Intell Nanomedicine, No. 9, Chengwan Street, Haidian District, Beijing, 100000, China
| | - Guangjun Nie
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao Zhao
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, 11 Beiyitiao, Zhongguancun, Beijing, 100190, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
- IGDB-NCNST Joint Research Center, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
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5
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Wang Y, Baars I, Fördös F, Högberg B. Clustering of Death Receptor for Apoptosis Using Nanoscale Patterns of Peptides. ACS NANO 2021; 15:9614-9626. [PMID: 34019379 PMCID: PMC8223489 DOI: 10.1021/acsnano.0c10104] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 05/18/2021] [Indexed: 05/20/2023]
Abstract
The nanoscale spatial organization of transmembrane tumor necrosis factor (TNF) receptors has been implicated in the regulation of cellular fate. Accordingly, molecular tools that can induce specific arrangements of these receptors on cell surfaces would give us an opportunity to study these effects in detail. To achieve this, we introduce DNA origami nanostructures that precisely scaffold the patterning of TNF-related apoptosis-inducing ligand-mimicking peptides at nanoscale level. Stimulating human breast cancer cells with these patterns, we find that around 5 nm is the critical interligand distance of hexagonally patterned peptides to induce death receptor clustering and a resulting apoptosis. We thus offer a strategy to reverse the non-efficacy of current ligand- and antibody-based methods for TNF superfamily activation.
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Affiliation(s)
- Yang Wang
- Department of Medical Biochemistry
and Biophysics, Karolinska Institutet, SE-17177 Stockholm, Sweden
| | - Igor Baars
- Department of Medical Biochemistry
and Biophysics, Karolinska Institutet, SE-17177 Stockholm, Sweden
| | - Ferenc Fördös
- Department of Medical Biochemistry
and Biophysics, Karolinska Institutet, SE-17177 Stockholm, Sweden
| | - Björn Högberg
- Department of Medical Biochemistry
and Biophysics, Karolinska Institutet, SE-17177 Stockholm, Sweden
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6
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Fischer R, Kontermann RE, Pfizenmaier K. Selective Targeting of TNF Receptors as a Novel Therapeutic Approach. Front Cell Dev Biol 2020; 8:401. [PMID: 32528961 PMCID: PMC7264106 DOI: 10.3389/fcell.2020.00401] [Citation(s) in RCA: 117] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 05/01/2020] [Indexed: 12/14/2022] Open
Abstract
Tumor necrosis factor (TNF) is a central regulator of immunity. Due to its dominant pro-inflammatory effects, drugs that neutralize TNF were developed and are clinically used to treat inflammatory and autoimmune diseases, such as rheumatoid arthritis, inflammatory bowel disease and psoriasis. However, despite their clinical success the use of anti-TNF drugs is limited, in part due to unwanted, severe side effects and in some diseases its use even is contraindicative. With gaining knowledge about the signaling mechanisms of TNF and the differential role of the two TNF receptors (TNFR), alternative therapeutic concepts based on receptor selective intervention have led to the development of novel protein therapeutics targeting TNFR1 with antagonists and TNFR2 with agonists. These antibodies and bio-engineered ligands are currently in preclinical and early clinical stages of development. Preclinical data obtained in different disease models show that selective targeting of TNFRs has therapeutic potential and may be superior to global TNF blockade in several disease indications.
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Affiliation(s)
- Roman Fischer
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
| | - Roland E Kontermann
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
| | - Klaus Pfizenmaier
- Institute of Cell Biology and Immunology, University of Stuttgart, Stuttgart, Germany
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7
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Jing G, Wang Z, Zhuang X, He X, Wu H, Wang Q, Cheng L, Liu Z, Wang S, Zhu R. Suspended graphene oxide nanosheets maintain the self-renewal of mouse embryonic stem cells via down-regulating the expression of Vinculin. Biomaterials 2018; 171:1-11. [PMID: 29677519 DOI: 10.1016/j.biomaterials.2018.04.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 04/05/2018] [Accepted: 04/10/2018] [Indexed: 12/17/2022]
Abstract
Graphene oxide (GO), with good hydrophilicity and biocompatibility, is widely explored as a carrier for various factors in the field of stem cell differentiation. However, its function of sustaining the stemness of mouse embryonic stem cells (mESCs) and the underlying mechanisms of this process remains undiscovered. Herein, we explored the biofunction of GO on mESCs and revealed the involved signaling pathways and key gene. The alkaline phosphatase activity detection, pluripotency genes quantification and the teratomas formation in vivo confirmed that GO nanosheets could sustain the self-renewal ability of mESCs instead of influencing its pluripotency. The underlying signaling pathways were uncovered by RNA-seq that integrin signaling pathway was involved in the biofunction of GO on mESCs and Vinculin turned to be a key gene for the effect of GO. Further experiments confirmed that the downregulation of Vinculin influenced the fate of mESCs through decreasing the expression of MEK1. Altogether, the study demonstrated for the first time that GOs hold the potential in sustaining the self-renewal of mESCs and clarified the mechanism of this function, which make it play a new role in stem cell research and regenerative medicine.
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Affiliation(s)
- Guoxin Jing
- Research Center for Translational Medicine at East Hospital, School of Life Science and Technology, Tongji University, PR China
| | - Zhaojie Wang
- Research Center for Translational Medicine at East Hospital, School of Life Science and Technology, Tongji University, PR China
| | - Xizhen Zhuang
- Research Center for Translational Medicine at East Hospital, School of Life Science and Technology, Tongji University, PR China
| | - Xiaolie He
- Research Center for Translational Medicine at East Hospital, School of Life Science and Technology, Tongji University, PR China
| | - Huijun Wu
- Research Center for Translational Medicine at East Hospital, School of Life Science and Technology, Tongji University, PR China
| | - Qingxiu Wang
- Research Center for Translational Medicine at East Hospital, School of Life Science and Technology, Tongji University, PR China
| | | | - Zhongmin Liu
- Research Center for Translational Medicine at East Hospital, School of Life Science and Technology, Tongji University, PR China
| | - Shilong Wang
- Research Center for Translational Medicine at East Hospital, School of Life Science and Technology, Tongji University, PR China.
| | - Rongrong Zhu
- Research Center for Translational Medicine at East Hospital, School of Life Science and Technology, Tongji University, PR China.
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8
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Cai H, Depoil D, Muller J, Sheetz MP, Dustin ML, Wind SJ. Spatial Control of Biological Ligands on Surfaces Applied to T Cell Activation. Methods Mol Biol 2018; 1584:307-331. [PMID: 28255709 DOI: 10.1007/978-1-4939-6881-7_18] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In this chapter, we present techniques, based on molecular-scale nanofabrication and selective self-assembly, for the presentation of biomolecules of interest (ligands, receptors, etc.) on a surface with precise spatial control and arbitrary geometry at the single-molecule level. Metallic nanodot arrays are created on glass coverslips and are then used as anchors for the immobilization of biological ligands via thiol linking chemistry. The nanodot size is controlled by both lithography and metallization. The reagent concentration in self-assembly can be adjusted to ensure single-molecule occupancy for a given dot size. The surrounding glass is backfilled by a protein-repellent layer to prevent nonspecific adsorption. Moreover, bifunctional surfaces are created, whereby a second ligand is presented on the background, which is frequently a requirement for simulating complex cellular functions involving more than one key ligand. This platform serves as a novel and powerful tool for molecular and cellular biology, e.g., to study the fundamental mechanisms of receptor-mediated signaling.
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Affiliation(s)
- Haogang Cai
- Department of Mechanical Engineering, Columbia University, New York, USA
| | - David Depoil
- Kennedy Institute of Rheumatology, NDORMS, The University of Oxford, Oxford, UK
| | - James Muller
- Department of Pathology, Skirball Institute, New York University School of Medicine, New York, USA
| | - Michael P Sheetz
- Department of Biological Sciences, Columbia University, New York, USA.,National University of Singapore, Singapore, Singapore
| | - Michael L Dustin
- Kennedy Institute of Rheumatology, NDORMS, The University of Oxford, Oxford, UK.,Department of Pathology, Skirball Institute, New York University School of Medicine, New York, USA
| | - Shalom J Wind
- Department of Applied Physics and Applied Mathematics, Columbia University, 500 W 120th St, New York, NY, 10027, USA.
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9
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Amschler K, Kossmann E, Erpenbeck L, Kruss S, Schill T, Schön M, Möckel SMC, Spatz JP, Schön MP. Nanoscale Tuning of VCAM-1 Determines VLA-4-Dependent Melanoma Cell Plasticity on RGD Motifs. Mol Cancer Res 2017; 16:528-542. [PMID: 29222169 DOI: 10.1158/1541-7786.mcr-17-0272] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 08/08/2017] [Accepted: 11/09/2017] [Indexed: 11/16/2022]
Abstract
The biophysical fine-tuning of cancer cell plasticity is crucial for tumor progression but remains largely enigmatic. Although vascular cell adhesion molecule-1 (VCAM-1/CD106) has been implicated in melanoma progression, here its presentation on endothelial cells was associated with diminished melanoma cell spreading. Using a specific nanoscale modulation of VCAM-1 (tunable from 70 to 670 ligands/μm²) next to integrin ligands (RGD motifs) in a bifunctional system, reciprocal regulation of integrin α4 (ITGA4/VLA-4/CD49d)-dependent adhesion and spreading of melanoma cells was found. As the VCAM-1/VLA-4 receptor pair facilitated adhesion, while at the same time antagonizing RGD-mediated spreading, melanoma cell morphogenesis on these bifunctional matrices was directly regulated by VCAM-1 in a dichotomic and density-dependent fashion. This was accompanied by concordant regulation of F-actin cytoskeleton remodeling, Rac1-expression, and paxillin-related adhesion formation. The novel function of VCAM-1 was corroborated in vivo using two murine models of pulmonary metastasis. The regulation of melanoma cell plasticity by VCAM-1 highlights the complex regulation of tumor-matrix interactions.Implications: Nanotechnology has revealed a novel dichotomic function of the VCAM-1/VLA-4 interaction on melanoma cell plasticity, as nanoscale tuning of this interaction reciprocally determines adhesion and spreading in a ligand density-dependent manner. Mol Cancer Res; 16(3); 528-42. ©2017 AACR.
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Affiliation(s)
- Katharina Amschler
- Department of Dermatology, Venereology and Allergology, University Medical Center, Göttingen, Germany
| | - Eugen Kossmann
- Department of Dermatology, Venereology and Allergology, University Medical Center, Göttingen, Germany
| | - Luise Erpenbeck
- Department of Dermatology, Venereology and Allergology, University Medical Center, Göttingen, Germany
| | - Sebastian Kruss
- Department of Physical Chemistry, Georg August University, Göttingen, Germany
| | - Tillmann Schill
- Department of Dermatology, Venereology and Allergology, University Medical Center, Göttingen, Germany
| | - Margarete Schön
- Department of Dermatology, Venereology and Allergology, University Medical Center, Göttingen, Germany
| | - Sigrid M C Möckel
- Department of Dermatology, Venereology and Allergology, University Medical Center, Göttingen, Germany
| | - Joachim P Spatz
- Department of Cellular Biophysics, Max Planck Institute for Medical Research, Heidelberg and Laboratory of Biophysical Chemistry, University of Heidelberg, Heidelberg, Germany
| | - Michael P Schön
- Department of Dermatology, Venereology and Allergology, University Medical Center, Göttingen, Germany.
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10
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Fischer R, Marsal J, Guttà C, Eisler SA, Peters N, Bethea JR, Pfizenmaier K, Kontermann RE. Novel strategies to mimic transmembrane tumor necrosis factor-dependent activation of tumor necrosis factor receptor 2. Sci Rep 2017; 7:6607. [PMID: 28747780 PMCID: PMC5529482 DOI: 10.1038/s41598-017-06993-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 06/22/2017] [Indexed: 12/31/2022] Open
Abstract
Tumor necrosis factor receptor 2 (TNFR2) is known to mediate immune suppression and tissue regeneration. Interestingly, the transmembrane form of tumor necrosis factor (tmTNF) is necessary to robustly activate TNFR2. To characterize the stoichiometry and composition of tmTNF during TNFR2 activation, we constructed differently oligomerized single chain TNF ligands (scTNF) comprised of three TNF homology domain (THD) protomers that mimic tmTNF. Using a variety of cellular and in vivo assays, we can show that higher oligomerization of the scTNF trimers results in more efficient TNF/TNFR2 clustering and subsequent signal transduction. Importantly, the three-dimensional orientation of the scTNF trimers impacts the bioactivity of the oligomerized scTNF ligands. Our data unravel the organization of tmTNF-mimetic scTNF ligands capable of robustly activating TNFR2 and introduce novel TNFR2 agonists that hold promise as therapeutics to treat a variety of diseases.
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Affiliation(s)
- Roman Fischer
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany. .,Department of Biology, Drexel University, 3245 Chestnut Street, Philadelphia, PA, 19104, USA.
| | - Jessica Marsal
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
| | - Cristiano Guttà
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
| | - Stephan A Eisler
- Stuttgart Research Center Systems Biology, Nobelstraße 15, University of Stuttgart, Stuttgart, Germany
| | - Nathalie Peters
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
| | - John R Bethea
- Department of Biology, Drexel University, 3245 Chestnut Street, Philadelphia, PA, 19104, USA
| | - Klaus Pfizenmaier
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany
| | - Roland E Kontermann
- Institute of Cell Biology and Immunology, University of Stuttgart, Allmandring 31, 70569, Stuttgart, Germany.
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11
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Cai H, Wolfenson H, Depoil D, Dustin ML, Sheetz MP, Wind SJ. Molecular Occupancy of Nanodot Arrays. ACS NANO 2016; 10:4173-83. [PMID: 26966946 PMCID: PMC5337305 DOI: 10.1021/acsnano.5b07425] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Single-molecule nanodot arrays, in which a biomolecule of choice (protein, nucleic acid, etc.) is bound to a metallic nanoparticle on a solid substrate, are becoming an increasingly important tool in the study of biomolecular and cellular interactions. We have developed an on-chip measurement protocol to monitor and control the molecular occupancy of nanodots. Arrays of widely spaced nanodots and nanodot clusters were fabricated on glass surfaces by nanolithography and functionalized with fluorescently labeled proteins. The molecular occupancy was determined by monitoring individual fluorophore bleaching events, while accounting for fluorescence quenching effects. We found that the occupancy can be interpreted as a packing problem, and depends on nanodot size and binding ligand concentration, where the latter is easily adjusted to compensate the flexibility of dimension control in nanofabrication. The results are scalable with nanodot cluster size, extending to large area close packed arrays. As an example, the nanoarray platform was used to probe the geometric requirement of T-cell activation at the single-molecule level.
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Affiliation(s)
- Haogang Cai
- Department of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Haguy Wolfenson
- Department of Biological Sciences, Columbia University, New York, New York 10027, United States
| | - David Depoil
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Michael L. Dustin
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, OX3 7FY, United Kingdom
| | - Michael P. Sheetz
- Department of Biological Sciences, Columbia University, New York, New York 10027, United States
| | - Shalom J. Wind
- Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
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12
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Li S, Wang X, Cao B, Ye K, Li Z, Ding J. Effects of Nanoscale Spatial Arrangement of Arginine-Glycine-Aspartate Peptides on Dedifferentiation of Chondrocytes. NANO LETTERS 2015; 15:7755-7765. [PMID: 26503136 DOI: 10.1021/acs.nanolett.5b04043] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Cell dedifferentiation is of much importance in many cases such as the classic problem of dedifferentiation of chondrocytes during in vitro culture in cartilage tissue engineering. While cell differentiation has been much investigated, studies of cell dedifferentiation are limited, and the nanocues of cell dedifferentiation have little been reported. Herein, we prepared nanopatterns and micro/nanopatterns of cell-adhesive arginine-glycine-aspartate (RGD) peptides on nonfouling poly(ethylene glycol) (PEG) hydrogels to examine the effects of RGD nanospacing on adhesion and dedifferentiation of chondrocytes. The relatively larger RGD nanospacing above 70 nm was found to enhance the maintainence of the chondrocyte phenotype in two-dimensional culture, albeit not beneficial for adhesion of chondrocytes. A unique micro/nanopattern was employed to decouple cell spreading, cell shape, and cell-cell contact from RGD nanospacing. Under given spreading size and shape of single cells, the large RGD nanospacing was still in favor of preserving the normal phenotype of chondrocytes. Hence, the nanoscale spatial arrangement of cell-adhesive ligands affords a new independent regulator of cell dedifferentiation, which should be taken into consideration in biomaterial design for regenerative medicine.
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Affiliation(s)
- Shiyu Li
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University , Shanghai 200433, China
| | - Xuan Wang
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University , Shanghai 200433, China
| | - Bin Cao
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University , Shanghai 200433, China
| | - Kai Ye
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University , Shanghai 200433, China
| | - Zhenhua Li
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University , Shanghai 200433, China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University , Shanghai 200433, China
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13
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Fujita Y, Furushima R, Ohno H, Sagawa F, Inoue T. Cell-surface receptor control that depends on the size of a synthetic equilateral-triangular RNA-protein complex. Sci Rep 2014; 4:6422. [PMID: 25234354 PMCID: PMC4168268 DOI: 10.1038/srep06422] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Accepted: 08/26/2014] [Indexed: 01/29/2023] Open
Abstract
A human cell surface displays many complex-structured receptors for receiving extracellular signals to regulate cellular functions. The use of precisely regulated signal-controls of the receptors could have possibilities beyond the current synthetic biology research that begins with the transfection of exogenous molecules to rewire intracellular circuits. However, by using a current ligand-receptor technique, the configuration of the artificially assembled cell surface molecules has been undefined because the assemblage is an unsystematic molecular clustering. Thus, the system bears improvements for precisely regulating receptor functions. We report here a new tool that refines stereochemically-controlled positioning of an assembled surface receptor. The tool performs rationally as an ON/OFF switch and is finely tunable so that a 3 to 6 nm size difference of the device precisely distinguishes the efficiency of apoptosis induced via cell-surface receptor binding. We discuss the potential use of the device in next-generation synthetic biology and in cell surface studies.
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Affiliation(s)
- Yoshihiko Fujita
- Laboratory of Gene Biodynamics, Graduate School of Biostudies, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Rie Furushima
- 1] Laboratory of Gene Biodynamics, Graduate School of Biostudies, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502, Japan [2]
| | - Hirohisa Ohno
- Laboratory of Gene Biodynamics, Graduate School of Biostudies, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Fumihiko Sagawa
- Laboratory of Gene Biodynamics, Graduate School of Biostudies, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Tan Inoue
- Laboratory of Gene Biodynamics, Graduate School of Biostudies, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto, 606-8502, Japan
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14
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Xi W, Schmidt CK, Sanchez S, Gracias DH, Carazo-Salas RE, Jackson SP, Schmidt O. Rolled-up functionalized nanomembranes as three-dimensional cavities for single cell studies. NANO LETTERS 2014; 14:4197-204. [PMID: 24598026 PMCID: PMC4133182 DOI: 10.1021/nl4042565] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 02/24/2014] [Indexed: 05/17/2023]
Abstract
We use micropatterning and strain engineering to encapsulate single living mammalian cells into transparent tubular architectures consisting of three-dimensional (3D) rolled-up nanomembranes. By using optical microscopy, we demonstrate that these structures are suitable for the scrutiny of cellular dynamics within confined 3D-microenvironments. We show that spatial confinement of mitotic mammalian cells inside tubular architectures can perturb metaphase plate formation, delay mitotic progression, and cause chromosomal instability in both a transformed and nontransformed human cell line. These findings could provide important clues into how spatial constraints dictate cellular behavior and function.
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Affiliation(s)
- Wang Xi
- Institute
for Integrative Nanosciences, IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany
- Max
Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
| | - Christine K. Schmidt
- The
Gurdon Institute and Departments of Biochemistry and Genetics, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, United Kingdom
| | - Samuel Sanchez
- Institute
for Integrative Nanosciences, IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany
- Max
Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
| | - David H. Gracias
- Department
of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Rafael E. Carazo-Salas
- The
Gurdon Institute and Departments of Biochemistry and Genetics, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, United Kingdom
| | - Stephen P. Jackson
- The
Gurdon Institute and Departments of Biochemistry and Genetics, University of Cambridge, Tennis Court Road, Cambridge CB2 1QN, United Kingdom
- The
Wellcome Trust Sanger Institute, Hinxton, Cambridge, CB10 1SA, United Kingdom
| | - Oliver
G. Schmidt
- Institute
for Integrative Nanosciences, IFW Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany
- Material
Systems for Nanoelectronics, Chemnitz University
of Technology, Reichenhainer
Strasse 70, D-09107 Chemnitz, Germany
- Center
for Advancing Electronics Dresden, Dresden
University of Technology, Georg-Schumann-Str. 11, 01187 Dresden, Germany
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15
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Gautrot JE, Malmström J, Sundh M, Margadant C, Sonnenberg A, Sutherland DS. The nanoscale geometrical maturation of focal adhesions controls stem cell differentiation and mechanotransduction. NANO LETTERS 2014; 14:3945-52. [PMID: 24848978 DOI: 10.1021/nl501248y] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We show that the nanoscale adhesion geometry controls the spreading and differentiation of epidermal stem cells. We find that cells respond to such hard nanopatterns similarly to their behavior on soft hydrogels. Cellular responses were seen to stem from local changes in diffusion dynamics of the adapter protein vinculin and associated impaired mechanotransduction rather than impaired recruitment of proteins involved in focal adhesion formation.
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Affiliation(s)
- Julien E Gautrot
- Institute of Bioengineering and ‡School of Engineering and Materials Science, Queen Mary, University of London , Mile End Road, London E1 4NS, United Kingdom
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16
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Bae H, Chu H, Edalat F, Cha JM, Sant S, Kashyap A, Ahari AF, Kwon CH, Nichol JW, Manoucheri S, Zamanian B, Wang Y, Khademhosseini A. Development of functional biomaterials with micro- and nanoscale technologies for tissue engineering and drug delivery applications. J Tissue Eng Regen Med 2014; 8:1-14. [PMID: 22711442 PMCID: PMC4199309 DOI: 10.1002/term.1494] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 01/07/2012] [Accepted: 01/24/2012] [Indexed: 12/13/2022]
Abstract
Micro- and nanotechnologies have emerged as potentially effective fabrication tools for addressing the challenges faced in tissue engineering and drug delivery. The ability to control and manipulate polymeric biomaterials at the micron and nanometre scale with these fabrication techniques has allowed for the creation of controlled cellular environments, engineering of functional tissues and development of better drug delivery systems. In tissue engineering, micro- and nanotechnologies have enabled the recapitulation of the micro- and nanoscale detail of the cell's environment through controlling the surface chemistry and topography of materials, generating 3D cellular scaffolds and regulating cell-cell interactions. Furthermore, these technologies have led to advances in high-throughput screening (HTS), enabling rapid and efficient discovery of a library of materials and screening of drugs that induce cell-specific responses. In drug delivery, controlling the size and geometry of drug carriers with micro- and nanotechnologies have allowed for the modulation of parametres such as bioavailability, pharmacodynamics and cell-specific targeting. In this review, we introduce recent developments in micro- and nanoscale engineering of polymeric biomaterials, with an emphasis on lithographic techniques, and present an overview of their applications in tissue engineering, HTS and drug delivery.
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Affiliation(s)
- Hojae Bae
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Hunghao Chu
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Faramarz Edalat
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jae Min Cha
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Shilpa Sant
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Aditya Kashyap
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Information Technology and Electrical Engineering, Swiss Federal Institute of Technology Zurich (ETH), 8092 Zurich, Switzerland
| | - Amir F. Ahari
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Chung Hoon Kwon
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jason W. Nichol
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sam Manoucheri
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Behnam Zamanian
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yadong Wang
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15260, USA
| | - Ali Khademhosseini
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Partners Research Building, 65 Landsdowne Street, Room 252, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA
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17
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Matic J, Deeg J, Scheffold A, Goldstein I, Spatz JP. Fine tuning and efficient T cell activation with stimulatory aCD3 nanoarrays. NANO LETTERS 2013; 13:5090-7. [PMID: 24111628 PMCID: PMC3834297 DOI: 10.1021/nl4022623] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 10/03/2013] [Indexed: 05/20/2023]
Abstract
Anti-CD3 (aCD3) nanoarrays fabricated by self-assembled nanopatterning combined with site-directed protein immobilization techniques represent a novel T cell stimulatory platform that allows tight control over ligand orientation and surface density. Here, we show that activation of primary human CD4+ T cells, defined by CD69 upregulation, IL-2 production and cell proliferation, correlates with aCD3 density on nanoarrays. Immobilization of aCD3 through nanopatterning had two effects: cell activation was significantly higher on these surfaces than on aCD3-coated plastics and allowed unprecedented fine-tuning of T cell response.
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Affiliation(s)
- Jovana Matic
- Department
of New Materials and Biosystems, Max Planck
Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
- Department
of Biophysical Chemistry, University of
Heidelberg, INF 253, Germany
| | - Janosch Deeg
- Department
of New Materials and Biosystems, Max Planck
Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
- Department
of Biophysical Chemistry, University of
Heidelberg, INF 253, Germany
| | - Alexander Scheffold
- Department
of Cellular Immunology, Clinics for Rheumatology and Clinical Immunology, Charité University Medicine Berlin, Berlin, Germany
- German
Rheumatism Research Centre (DRFZ) Berlin, Leibniz Association, Berlin, Germany
| | - Itamar Goldstein
- Immunology
Core Laboratory, Sheba Cancer Research Center, Chaim Sheba Medical Center, Tel
Hashomer 52621, Israel
- Sackler
Faculty of Medicine, Tel Aviv University, Israel
| | - Joachim P. Spatz
- Department
of New Materials and Biosystems, Max Planck
Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
- Department
of Biophysical Chemistry, University of
Heidelberg, INF 253, Germany
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18
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Antagonistic TNF receptor one-specific antibody (ATROSAB): receptor binding and in vitro bioactivity. PLoS One 2013; 8:e72156. [PMID: 23977237 PMCID: PMC3747052 DOI: 10.1371/journal.pone.0072156] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 07/07/2013] [Indexed: 12/31/2022] Open
Abstract
Background Selective inhibition of TNFR1 signaling holds the potential to greatly reduce the pro-inflammatory activity of TNF, while leaving TNFR2 untouched, thus allowing for cell survival and tissue homeostasis. ATROSAB is a humanized antagonistic anti-TNFR1 antibody developed for the treatment of inflammatory diseases. Methodology/Principal Findings The epitope of ATROSAB resides in the N-terminal region of TNFR1 covering parts of CRD1 and CRD2. By site-directed mutagenesis, we identified Arg68 and His69 of TNFR1 as important residues for ATROSAB binding. ATROSAB inhibited binding of 125I-labeled TNF to HT1080 in the subnanomolar range. Furthermore, ATROSAB inhibited release of IL-6 and IL-8 from HeLa and HT1080 cells, respectively, induced by TNF or lymphotoxin alpha (LTα). Different from an agonistic antibody (Htr-9), which binds to a region close to the ATROSAB epitope but elicits strong TNFR1 activation, ATROSAB showed a negligible induction of IL-6 and IL-8 production over a broad concentration range. We further verified that ATROSAB, comprising mutations within the Fc region known to abrogate complement fixation and antibody-mediated cellular effector functions, indeed lacks binding activity for C1q, FcγRI (CD64), FcγRIIB (CD32b), and FcγRIII (CD16) disabling ADCC and CDC. Conlusions/Significance The data corroborate ATROSAB’s unique function as a TNFR1-selective antagonist efficiently blocking both TNF and LTα action. In agreement with recent studies of TNFR1 complex formation and activation, we suggest a model of the underlying mechanism of TNFR1 inhibition by ATROSAB.
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19
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Park HG, Yeo MK. Comparison of gene expression changes induced by exposure to Ag, Cu-TiO2, and TiO2 nanoparticles in zebrafish embryos. Mol Cell Toxicol 2013. [DOI: 10.1007/s13273-013-0017-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Delcassian D, Depoil D, Rudnicka D, Liu M, Davis DM, Dustin ML, Dunlop IE. Nanoscale ligand spacing influences receptor triggering in T cells and NK cells. NANO LETTERS 2013; 13:5608-14. [PMID: 24125583 PMCID: PMC4288448 DOI: 10.1021/nl403252x] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Bioactive nanoscale arrays were constructed to ligate activating cell surface receptors on T cells (the CD3 component of the TCR complex) and natural killer (NK) cells (CD16). These arrays are formed from biofunctionalized gold nanospheres with controlled interparticle spacing in the range 25-104 nm. Responses to these nanoarrays were assessed using the extent of membrane-localized phosphotyrosine in T cells stimulated with CD3-binding nanoarrays and the size of cell contact area for NK cells stimulated with CD16-binding nanoarrays. In both cases, the strength of response decreased with increasing spacing, falling to background levels by 69 nm in the T cell/anti-CD3 system and 104 nm for the NK cell/anti-CD16 system. These results demonstrate that immune receptor triggering can be influenced by the nanoscale spatial organization of receptor/ligand interactions.
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MESH Headings
- CD3 Complex/chemistry
- CD3 Complex/immunology
- Humans
- Killer Cells, Natural/chemistry
- Killer Cells, Natural/immunology
- Nanoparticles/chemistry
- Nanotechnology
- Receptor-CD3 Complex, Antigen, T-Cell/chemistry
- Receptor-CD3 Complex, Antigen, T-Cell/immunology
- Receptors, Cell Surface/chemistry
- Receptors, Cell Surface/immunology
- Receptors, IgG/chemistry
- Receptors, IgG/immunology
- Receptors, Natural Killer Cell/chemistry
- Receptors, Natural Killer Cell/immunology
- T-Lymphocytes/chemistry
- T-Lymphocytes/immunology
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Affiliation(s)
- Derfogail Delcassian
- Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - David Depoil
- Skirball Institute of Biomolecular Medicine, NYU School of Medicine, New York, New York, NY10016 USA
| | - Dominika Rudnicka
- Division of Cell and Molecular Biology, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Mengling Liu
- Department of Biostatistics, NYU School of Medicine, New York, New York, NY10016 USA
| | - Daniel M. Davis
- Division of Cell and Molecular Biology, Imperial College London, Exhibition Road, London SW7 2AZ, UK
- Manchester Collaborative Centre for Inflammation Research, University of Manchester, Grafton Street, Manchester M13 9NT, UK
| | - Michael L. Dustin
- Skirball Institute of Biomolecular Medicine, NYU School of Medicine, New York, New York, NY10016 USA
- Kennedy Institute of Rheumatology, University of Oxford, Old Road Campus, Oxford, OX3 7FY, UK
| | - Iain E. Dunlop
- Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, UK
- To whom correspondence should be addressed:
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21
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Lee DS, Park JS, Lee EJ, Kim HJ, Lee J. A protein nanofiber hydrogel for sensitive immunoassays. Analyst 2013; 138:4786-94. [DOI: 10.1039/c3an00564j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Lee EJ, Ahn KY, Lee JH, Park JS, Song JA, Sim SJ, Lee EB, Cha YJ, Lee J. A novel bioassay platform using ferritin-based nanoprobe hydrogel. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:4739-4730. [PMID: 22778052 DOI: 10.1002/adma.201200728] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 04/25/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Eun Jung Lee
- Department of Chemical and Biological Engineering, College of Engineering, Korea University, Anam-Ro 145, Seoul 136-713, Republic of Korea
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23
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Mascarenhas NM, Kästner J. Are different stoichiometries feasible for complexes between lymphotoxin-alpha and tumor necrosis factor receptor 1? BMC STRUCTURAL BIOLOGY 2012; 12:8. [PMID: 22568977 PMCID: PMC3412742 DOI: 10.1186/1472-6807-12-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Accepted: 05/08/2012] [Indexed: 01/11/2023]
Abstract
Background Tumor necrosis factors, TNF and lymphotoxin-α (LT), are cytokines that bind to two receptors, TNFR1 and TNFR2 (TNF-receptor 1 and 2) to trigger their signaling cascades. The exact mechanism of ligand-induced receptor activation is still unclear. It is generally assumed that three receptors bind to the homotrimeric ligand to trigger a signaling event. Recent evidence, though, has raised doubts if the ligand:receptor stoichiometry should indeed be 3:3 for ligand-induced cellular response. We used molecular dynamics simulations, elastic network models, as well as MM/PBSA to analyze this question. Results Applying MM/PBSA methodology to different stoichiometric complexes of human LT-(TNFR1)n=1,2,3 the free energy of binding in these complexes has been estimated by single-trajectory and separate-trajectory methods. Simulation studies rationalized the favorable binding energy in the LT-(TNFR1)1 complex, as evaluated from single-trajectory analysis to be an outcome of the interaction of cysteine-rich domain 4 (CRD4) and the ligand. Elastic network models (ENMs) help to associate the difference in the global fluctuation of the receptors in these complexes. Functionally relevant transformation associated with these complexes reveal the difference in the dynamics of the receptor when free and in complex with LT. Conclusions MM/PBSA predicts complexes with a ligand-receptor molar ratio of 3:1 and 3:2 to be energetically favorable. The high affinity associated with LT-(TNFR1)1 is due to the interaction between the CRD4 domain with LT. The global dynamics ascertained from ENMs have highlighted the differential dynamics of the receptor in different states.
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Affiliation(s)
- Nahren Manuel Mascarenhas
- Computational Biochemistry Group, Institute of Theoretical Chemistry, Pfaffenwaldring 55, University of Stuttgart, Stuttgart, Germany
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24
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The tumor necrosis factor receptor stalk regions define responsiveness to soluble versus membrane-bound ligand. Mol Cell Biol 2012; 32:2515-29. [PMID: 22547679 DOI: 10.1128/mcb.06458-11] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The family of tumor necrosis factor receptors (TNFRs) and their ligands form a regulatory signaling network that controls immune responses. Various members of this receptor family respond differently to the soluble and membrane-bound forms of their respective ligands. However, the determining factors and underlying molecular mechanisms of this diversity are not yet understood. Using an established system of chimeric TNFRs and novel ligand variants mimicking the bioactivity of membrane-bound TNF (mTNF), we demonstrate that the membrane-proximal extracellular stalk regions of TNFR1 and TNFR2 are crucial in controlling responsiveness to soluble TNF (sTNF). We show that the stalk region of TNFR2, in contrast to the corresponding part of TNFR1, efficiently inhibits both the receptor's enrichment/clustering in particular cell membrane regions and ligand-independent homotypic receptor preassembly, thereby preventing sTNF-induced, but not mTNF-induced, signaling. Thus, the stalk regions of the two TNFRs not only have implications for additional TNFR family members, but also provide potential targets for therapeutic intervention.
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Valley CC, Lewis AK, Mudaliar DJ, Perlmutter JD, Braun AR, Karim CB, Thomas DD, Brody JR, Sachs JN. Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) induces death receptor 5 networks that are highly organized. J Biol Chem 2012; 287:21265-78. [PMID: 22496450 DOI: 10.1074/jbc.m111.306480] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Recent evidence suggests that TNF-related apoptosis-inducing ligand (TRAIL), a death-inducing cytokine with anti-tumor potential, initiates apoptosis by re-organizing TRAIL receptors into large clusters, although the structure of these clusters and the mechanism by which they assemble are unknown. Here, we demonstrate that TRAIL receptor 2 (DR5) forms receptor dimers in a ligand-dependent manner at endogenous receptor levels, and these receptor dimers exist within high molecular weight networks. Using mutational analysis, FRET, fluorescence microscopy, synthetic biochemistry, and molecular modeling, we find that receptor dimerization relies upon covalent and noncovalent interactions between membrane-proximal residues. Additionally, by using FRET, we show that the oligomeric structure of two functional isoforms of DR5 is indistinguishable. The resulting model of DR5 activation should revise the accepted architecture of the functioning units of DR5 and the structurally homologous TNF receptor superfamily members.
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Affiliation(s)
- Christopher C Valley
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Lee H, Jang Y, Seo J, Nam JM, Char K. Nanoparticle-functionalized polymer platform for controlling metastatic cancer cell adhesion, shape, and motility. ACS NANO 2011; 5:5444-5456. [PMID: 21702475 DOI: 10.1021/nn202103z] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Controlling and understanding the changes in metastatic cancer cell adhesion, shape, and motility are of paramount importance in cancer research, diagnosis, and treatment. Here, we used gold nanoparticles (AuNPs) as nanotopological structures and protein nanocluster forming substrates. Cell adhesion controlling proteins [in this case, fibronection (Fn) and ephrinB3] were modified to AuNPs, and these particles were then modified to the layer-by-layer (LbL) polymer surface that offers a handle for tuning surface charge and mechanical property of a cell-interfacing substrate. We found that metastatic cancer cell adhesion is affected by nanoparticle density on a surface, and ∼140 particles per 400 μm(2) (∼1.7 μm spacing between AuNPs) is optimal for effective metastatic cell adhesion. It was also shown that the AuNP surface density and protein nanoclustering on a spherical AuNP are controlling factors for the efficient interfacing and signaling of metastatic cancer cells. Importantly, the existence of nanotopological features (AuNPs in this case) is much more critical in inducing more dramatic changes in metastatic cell adhesion, protrusion, polarity, and motility than the presence of a cell adhesion protein, Fn, on the surface. Moreover, cell focal adhesion and motility-related paxillin clusters were heavily formed in cell lamellipodia and filopodia and high expression of phospho-paxillins were observed when the cells were cultured on either an AuNP or Fn-modified AuNP polymer surface. The ephrin signaling that results in the decreased expression of paxillin was found to be more effective when ephrins were modified to the AuNP surface than when ephrinB3 was directly attached to the polymer film. The overall trend for cell motility change is such that a nanoparticle-modified LbL surface induces higher cell motility and the AuNP modification to the LbL surface results in more pronounced change in cell motility than Fn or ephrin modification to the LbL surface.
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Affiliation(s)
- Hyojin Lee
- Department of Chemistry, Seoul National University, Seoul, 151-747, Korea
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Zhang X, Qiao Y, Xu L, Buriak JM. Constructing metal-based structures on nanopatterned etched silicon. ACS NANO 2011; 5:5015-5024. [PMID: 21545116 DOI: 10.1021/nn201109s] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Silicon surfaces with nanoscale etched patterns were obtained using polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) block copolymer films as templates, followed by brief immersion in HF(aq). The resulting interfaces were comprised of pseudohexagonal arrays of pits on the silicon, whose shapes depended upon the chosen silicon orientation. The top unetched face of silicon remains capped by the native oxide, and the pit interiors are terminated by Si-H(x). Selective chemical functionalization via these two chemical handles was demonstrated to be a viable approach toward building nanostructured metal oxide and metal features within these silicon pits and on the top face. Using a series of interfacial chemical reactions, including oxidation (of Si-H(x)-terminated regions), hydrosilylation, and alkoxysilane-based chemistry on silicon oxide, the growth of metal-based structures can be spatially controlled. In the first approach, titania nanobowls were grown within the etch pits, and in the second, galvanic displacement was used to produce gold nanoparticles either within the etch pits, on the top silicon face, or both.
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Affiliation(s)
- Xiaojiang Zhang
- National Institute for Nanotechnology, 11421 Saskatchewan Drive, Edmonton, Alberta, Canada T6G 2M9
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Coyer SR, Delamarche E, García AJ. Protein tethering into multiscale geometries by covalent subtractive printing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:1550-3. [PMID: 21449060 PMCID: PMC3131134 DOI: 10.1002/adma.201003744] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 12/09/2010] [Indexed: 05/22/2023]
Affiliation(s)
- Sean R. Coyer
- Woodruff School of Mechanical Engineering, Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332-0363, USA
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Schvartzman M, Palma M, Sable J, Abramson J, Hu X, Sheetz MP, Wind SJ. Nanolithographic control of the spatial organization of cellular adhesion receptors at the single-molecule level. NANO LETTERS 2011; 11:1306-12. [PMID: 21319842 PMCID: PMC3061283 DOI: 10.1021/nl104378f] [Citation(s) in RCA: 189] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
The ability to control the placement of individual molecules promises to enable a wide range of applications and is a key challenge in nanoscience and nanotechnology. Many biological interactions, in particular, are sensitive to the precise geometric arrangement of proteins. We have developed a technique which combines molecular-scale nanolithography with site-selective biochemistry to create biomimetic arrays of individual protein binding sites. The binding sites can be arranged in heterogeneous patterns of virtually any possible geometry with a nearly unlimited number of degrees of freedom. We have used these arrays to explore how the geometric organization of the extracellular matrix (ECM) binding ligand RGD (Arg-Gly-Asp) affects cell adhesion and spreading. Systematic variation of spacing, density, and cluster size of individual integrin binding sites was used to elicit different cell behavior. Cell spreading assays on arrays of different geometric arrangements revealed a dramatic increase in spreading efficiency when at least four liganded sites were spaced within 60 nm or less, with no dependence on global density. This points to the existence of a minimal matrix adhesion unit for fibronectin defined in space and stoichiometry. Developing an understanding of the ECM geometries that activate specific cellular functional complexes is a critical step toward controlling cell behavior. Potential practical applications range from new therapeutic treatments to the rational design of tissue scaffolds that can optimize healing without scarring. More broadly, spatial control at the single-molecule level can elucidate factors controlling individual molecular interactions and can enable synthesis of new systems based on molecular-scale architectures.
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Affiliation(s)
- Mark Schvartzman
- Department of Chemical Engineering, Columbia University, 500 West 120 St., New York, NY 10027
- Nanomedicine Center for Mechanobiology – Directing the Immune Response, Columbia University, New York, NY 10027
| | - Matteo Palma
- Department of Applied Physics and Applied Mathematics, Columbia University, 500 West 120 St., New York, NY 10027
- Department of Mechanical Engineering, Columbia University, 500 West 120 St., New York, NY 10027
- Nanomedicine Center for Mechanobiology – Directing the Immune Response, Columbia University, New York, NY 10027
| | - Julia Sable
- Department of Biological Sciences, Columbia University, 1212 Amsterdam Ave., New York, NY 10027
- Nanomedicine Center for Mechanobiology – Directing the Immune Response, Columbia University, New York, NY 10027
| | - Justin Abramson
- Department of Mechanical Engineering, Columbia University, 500 West 120 St., New York, NY 10027
- Nanomedicine Center for Mechanobiology – Directing the Immune Response, Columbia University, New York, NY 10027
| | - Xian Hu
- Department of Biological Sciences National University of Singapore
| | - Michael P. Sheetz
- Department of Biological Sciences, Columbia University, 1212 Amsterdam Ave., New York, NY 10027
- Nanomedicine Center for Mechanobiology – Directing the Immune Response, Columbia University, New York, NY 10027
| | - Shalom J. Wind
- Department of Applied Physics and Applied Mathematics, Columbia University, 500 West 120 St., New York, NY 10027
- Nanomedicine Center for Mechanobiology – Directing the Immune Response, Columbia University, New York, NY 10027
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Ohno H, Kobayashi T, Kabata R, Endo K, Iwasa T, Yoshimura SH, Takeyasu K, Inoue T, Saito H. Synthetic RNA-protein complex shaped like an equilateral triangle. NATURE NANOTECHNOLOGY 2011; 6:116-120. [PMID: 21240283 DOI: 10.1038/nnano.2010.268] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Accepted: 12/07/2010] [Indexed: 05/30/2023]
Abstract
Synthetic nanostructures consisting of biomacromolecules such as nucleic acids have been constructed using bottom-up approaches. In particular, Watson-Crick base pairing has been used to construct a variety of two- and three-dimensional DNA nanostructures. Here, we show that RNA and the ribosomal protein L7Ae can form a nanostructure shaped like an equilateral triangle that consists of three proteins bound to an RNA scaffold. The construction of the complex relies on the proteins binding to kink-turn (K-turn) motifs in the RNA, which allows the RNA to bend by ∼ 60° at three positions to form a triangle. Functional RNA-protein complexes constructed with this approach could have applications in nanomedicine and synthetic biology.
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Affiliation(s)
- Hirohisa Ohno
- Laboratory of Gene Biodynamics, Graduate School of Biostudies, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502, Japan
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Shi J, Votruba AR, Farokhzad OC, Langer R. Nanotechnology in drug delivery and tissue engineering: from discovery to applications. NANO LETTERS 2010; 10:3223-30. [PMID: 20726522 PMCID: PMC2935937 DOI: 10.1021/nl102184c] [Citation(s) in RCA: 961] [Impact Index Per Article: 68.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The application of nanotechnology in medicine, referred to as nanomedicine, is offering numerous exciting possibilities in healthcare. Herein, we discuss two important aspects of nanomedicine, drug delivery and tissue engineering, highlighting the advances we have recently experienced, the challenges we are currently facing, and what we are likely to witness in the near future.
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Affiliation(s)
- Jinjun Shi
- MIT-Harvard Center for Cancer Nanotechnology Excellence, Cambridge, Massachusetts, 02139
- Laboratory of Nanomedicine and Biomaterials, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, 02115
| | - Alexander R. Votruba
- Laboratory of Nanomedicine and Biomaterials, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, 02115
| | - Omid C. Farokhzad
- MIT-Harvard Center for Cancer Nanotechnology Excellence, Cambridge, Massachusetts, 02139
- Laboratory of Nanomedicine and Biomaterials, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, 02115
| | - Robert Langer
- MIT-Harvard Center for Cancer Nanotechnology Excellence, Cambridge, Massachusetts, 02139
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139
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