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He J, Shen R, Liu Q, Zheng S, Wang X, Gao J, Wang Q, Huang J, Ding J. RGD Nanoarrays with Nanospacing Gradient Selectively Induce Orientation and Directed Migration of Endothelial and Smooth Muscle Cells. ACS Appl Mater Interfaces 2022; 14:37436-37446. [PMID: 35943249 DOI: 10.1021/acsami.2c10006] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Directed migration of cells through cell-surface interactions is a paramount prerequisite in biomaterial-induced tissue regeneration. However, whether and how the nanoscale spatial gradient of adhesion molecules on a material surface can induce directed migration of cells is not sufficiently known. Herein, we employed block copolymer micelle nanolithography to prepare gold nanoarrays with a nanospacing gradient, which were prepared by continuously changing the dipping velocity. Then, a self-assembly monolayer technique was applied to graft arginine-glycine-aspartate (RGD) peptides on the nanodots and poly(ethylene glycol) (PEG) on the glass background. Since RGD can trigger specific cell adhesion via conjugating with integrin (its receptor in the cell membrane) and PEG can resist protein adsorption and nonspecific cell adhesion, a nanopattern with cell-adhesion contrast and a gradient of RGD nanospacing was eventually prepared. In vitro cell behaviors were examined using endothelial cells (ECs) and smooth muscle cells (SMCs) as a demonstration. We found that SMCs exhibited significant orientation and directed migration along the nanospacing gradient, while ECs exhibited only a weak spontaneously anisotropic migration. The gradient response was also dependent upon the RGD nanospacing ranges, namely, the start and end nanospacings under a given distance and gradient. The different responses of these two cell types to the RGD nanospacing gradient provide new insights for designing cell-selective nanomaterials potentially used in cell screening, wound healing, etc.
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Affiliation(s)
- Junhao He
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Runjia Shen
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Qiong Liu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
- Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai 200434, China
- Clinical Research Center for Anesthesiology and Perioperative Medicine, Tongji University, Shanghai 200434, China
| | - Shuang Zheng
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Xinlei Wang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Jingming Gao
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Qunsong Wang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Jiale Huang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
| | - Jiandong Ding
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China
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Minopoli A, Scardapane E, Ventura BD, Tanner JA, Offenhäusser A, Mayer D, Velotta R. Double-Resonant Nanostructured Gold Surface for Multiplexed Detection. ACS Appl Mater Interfaces 2022; 14:6417-6427. [PMID: 35089707 PMCID: PMC8832399 DOI: 10.1021/acsami.1c23438] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 01/18/2022] [Indexed: 05/17/2023]
Abstract
A novel double-resonant plasmonic substrate for fluorescence amplification in a chip-based apta-immunoassay is herein reported. The amplification mechanism relies on plasmon-enhanced fluorescence (PEF) effect. The substrate consists of an assembly of plasmon-coupled and plasmon-uncoupled gold nanoparticles (AuNPs) immobilized onto a glass slide. Plasmon-coupled AuNPs are hexagonally arranged along branch patterns whose resonance lies in the red band (∼675 nm). Plasmon-uncoupled AuNPs are sprinkled onto the substrate, and they exhibit a narrow resonance at 524 nm. Numerical simulations of the plasmonic response of the substrate through the finite-difference time-domain (FDTD) method reveal the presence of electromagnetic hot spots mainly confined in the interparticle junctions. In order to realize a PEF-based device for potential multiplexing applications, the plasmon resonances are coupled with the emission peak of 5-carboxyfluorescein (5-FAM) fluorophore and with the excitation/emission peaks of cyanine 5 (Cy5). The substrate is implemented in a malaria apta-immunoassay to detect Plasmodium falciparum lactate dehydrogenase (PfLDH) in human whole blood. Antibodies against Plasmodium biomarkers constitute the capture layer, whereas fluorescently labeled aptamers recognizing PfLDH are adopted as the top layer. The fluorescence emitted by 5-FAM and Cy5 fluorophores are linearly correlated (logarithm scale) to the PfLDH concentration over five decades. The limits of detection are 50 pM (1.6 ng/mL) with the 5-FAM probe and 260 fM (8.6 pg./mL) with the Cy5 probe. No sample preconcentration and complex pretreatments are required. Average fluorescence amplifications of 160 and 4500 are measured in the 5-FAM and Cy5 channel, respectively. These results are reasonably consistent with those worked out by FDTD simulations. The implementation of the proposed approach in multiwell-plate-based bioassays would lead to either signal redundancy (two dyes for a single analyte) or to a simultaneous detection of two analytes by different dyes, the latter being a key step toward high-throughput analysis.
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Affiliation(s)
- Antonio Minopoli
- Department
of Physics “E. Pancini”, University
Federico II, Via Cintia 26, 80126 Naples, Italy
- Institute
of Biological Information Processing (IBI-3), Bioelectronics, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Emanuela Scardapane
- Department
of Physics “E. Pancini”, University
Federico II, Via Cintia 26, 80126 Naples, Italy
| | | | - Julian A. Tanner
- School
of Biomedical Sciences, University of Hong
Kong, Hong Kong, China
| | - Andreas Offenhäusser
- Institute
of Biological Information Processing (IBI-3), Bioelectronics, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Dirk Mayer
- Institute
of Biological Information Processing (IBI-3), Bioelectronics, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Raffaele Velotta
- Department
of Physics “E. Pancini”, University
Federico II, Via Cintia 26, 80126 Naples, Italy
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Jeong HH, Mark AG, Lee TC, Son K, Chen W, Alarcón-Correa M, Kim I, Schütz G, Fischer P. Selectable Nanopattern Arrays for Nanolithographic Imprint and Etch-Mask Applications. Adv Sci (Weinh) 2015; 2:1500016. [PMID: 27980957 PMCID: PMC5115431 DOI: 10.1002/advs.201500016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 04/07/2015] [Indexed: 05/22/2023]
Abstract
A parallel nanolithographic patterning method is presented that can be used to obtain arrays of multifunctional nanoparticles. These patterns can simply be converted into a variety of secondary nanopatterns that are useful for nanolithographic imprint, plasmonic, and etch-mask applications.
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Affiliation(s)
- Hyeon-Ho Jeong
- Max Planck Institute for Intelligent Systems Heisenbergstr. 3 70569 Stuttgart Germany
| | - Andrew G Mark
- Max Planck Institute for Intelligent Systems Heisenbergstr. 3 70569 Stuttgart Germany
| | - Tung-Chun Lee
- Max Planck Institute for Intelligent Systems Heisenbergstr. 370569 Stuttgart Germany; Institute for Materials Discovery University College London Kathleen Lonsdale Building Gower Place London WC1E 6BT UK
| | - Kwanghyo Son
- Max Planck Institute for Intelligent Systems Heisenbergstr. 3 70569 Stuttgart Germany
| | - Wenwen Chen
- Max Planck Institute for Intelligent Systems Heisenbergstr. 370569 Stuttgart Germany; Department of Biophysical Chemistry University of Heidelberg INF 25369120 Heidelberg Germany
| | - Mariana Alarcón-Correa
- Max Planck Institute for Intelligent Systems Heisenbergstr. 370569 Stuttgart Germany; Institute for Physical Chemistry University of Stuttgart Pfaffenwaldring 5570569 Stuttgart Germany
| | - Insook Kim
- Max Planck Institute for Intelligent Systems Heisenbergstr. 370569 Stuttgart Germany; Institute for Physical Chemistry University of Stuttgart Pfaffenwaldring 5570569 Stuttgart Germany
| | - Gisela Schütz
- Max Planck Institute for Intelligent Systems Heisenbergstr. 3 70569 Stuttgart Germany
| | - Peer Fischer
- Max Planck Institute for Intelligent Systems Heisenbergstr. 370569 Stuttgart Germany; Institute for Physical Chemistry University of Stuttgart Pfaffenwaldring 5570569 Stuttgart Germany
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Medda R, Helth A, Herre P, Pohl D, Rellinghaus B, Perschmann N, Neubauer S, Kessler H, Oswald S, Eckert J, Spatz JP, Gebert A, Cavalcanti-Adam EA. Investigation of early cell-surface interactions of human mesenchymal stem cells on nanopatterned β-type titanium-niobium alloy surfaces. Interface Focus 2014; 4:20130046. [PMID: 24501674 DOI: 10.1098/rsfs.2013.0046] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Multi-potent adult mesenchymal stem cells (MSCs) derived from bone marrow have therapeutic potential for bone diseases and regenerative medicine. However, an intrinsic heterogeneity in their phenotype, which in turn results in various differentiation potentials, makes it difficult to predict the response of these cells. The aim of this study is to investigate initial cell-surface interactions of human MSCs on modified titanium alloys. Gold nanoparticles deposited on β-type Ti-40Nb alloys by block copolymer micelle nanolithography served as nanotopographical cues as well as specific binding sites for the immobilization of thiolated peptides present in several extracellular matrix proteins. MSC heterogeneity persists on polished and nanopatterned Ti-40Nb samples. However, cell heterogeneity and donor variability decreased upon functionalization of the gold nanoparticles with cyclic RGD peptides. In particular, the number of large cells significantly decreased after 24 h owing to the arrangement of cell anchorage sites, rather than peptide specificity. However, the size and number of integrin-mediated adhesion clusters increased in the presence of the integrin-binding peptide (cRGDfK) compared with the control peptide (cRADfK). These results suggest that the use of integrin ligands in defined patterns could improve MSC-material interactions, not only by regulating cell adhesion locally, but also by reducing population heterogeneity.
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Affiliation(s)
- Rebecca Medda
- Institute for Physical Chemistry , Ruprecht-Karl-University of Heidelberg , Heidelberg 69120 , Germany ; Max Planck Institute for Intelligent Systems , Stuttgart 70569 , Germany
| | - Arne Helth
- Institute for Complex Materials , IFW Dresden , PO Box 270116, Dresden 01171 , Germany
| | - Patrick Herre
- Institute for Metallic Materials , IFW Dresden , PO Box 270116, Dresden 01171 , Germany
| | - Darius Pohl
- Institute for Metallic Materials , IFW Dresden , PO Box 270116, Dresden 01171 , Germany
| | - Bernd Rellinghaus
- Institute for Metallic Materials , IFW Dresden , PO Box 270116, Dresden 01171 , Germany
| | - Nadine Perschmann
- Institute for Physical Chemistry , Ruprecht-Karl-University of Heidelberg , Heidelberg 69120 , Germany ; Max Planck Institute for Intelligent Systems , Stuttgart 70569 , Germany
| | - Stefanie Neubauer
- Institute for Advanced Study (IAS) and Center of Integrated Protein Science (CIPSM) , Technische Universität München , Lichtenbergstrasse 4, Garching 85747 , Germany
| | - Horst Kessler
- Institute for Advanced Study (IAS) and Center of Integrated Protein Science (CIPSM) , Technische Universität München , Lichtenbergstrasse 4, Garching 85747 , Germany
| | - Steffen Oswald
- Institute for Complex Materials , IFW Dresden , PO Box 270116, Dresden 01171 , Germany
| | - Jürgen Eckert
- Institute for Complex Materials , IFW Dresden , PO Box 270116, Dresden 01171 , Germany
| | - Joachim P Spatz
- Institute for Physical Chemistry , Ruprecht-Karl-University of Heidelberg , Heidelberg 69120 , Germany ; Max Planck Institute for Intelligent Systems , Stuttgart 70569 , Germany
| | - Annett Gebert
- Institute for Complex Materials , IFW Dresden , PO Box 270116, Dresden 01171 , Germany
| | - Elisabetta A Cavalcanti-Adam
- Institute for Physical Chemistry , Ruprecht-Karl-University of Heidelberg , Heidelberg 69120 , Germany ; Max Planck Institute for Intelligent Systems , Stuttgart 70569 , Germany
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