1
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Velasco L, Islam AN, Kundu K, Oi A, Reinhard BM. Two-color interferometric scattering (iSCAT) microscopy reveals structural dynamics in discrete plasmonic molecules. NANOSCALE 2024; 16:11696-11704. [PMID: 38860984 PMCID: PMC11189637 DOI: 10.1039/d4nr01288g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 06/03/2024] [Indexed: 06/12/2024]
Abstract
Plasmonic molecules are discrete assemblies of noble metal nanoparticles (NPs) that are of interest as transducers in optical nanosensors. So far, NPs with diameters of ∼40 nm have been the preferred building blocks for plasmonic molecules intended as optical single molecule sensors due to difficulties associated with detecting smaller NPs through elastic scattering in conventional darkfield microscopy. Here, we apply 405 nm, 445 nm two-color interferometric scattering (iSCAT) microscopy to characterize polyethylene glycol (PEG) tethered dimers of 10 nm and 20 nm Ag NPs and their monomers. Dimers of both NP sizes can be discerned from their respective monomers through changes in the average iSCAT contrast. In the case of 20 nm Ag NPs, dimer formation induces a change in the sign of the iSCAT contrast, providing a characteristic signal for detecting binding events. 20 nm Ag NP dimers with 0.4 kDa and 3.4 kDa polyethylene glycol (PEG) spacers show iSCAT contrast distributions with significantly different averages on both wavelength channels. The iSCAT contrast measured for individual PEG-tethered 10 nm or 20 nm NP dimers as a function of time shows contrast fluctuations indicative of a rich structural dynamics in the assembled plasmonic molecules, which provides an additional metric to discern dimers from monomers and paves the path to a new class of interferometric plasmon rulers.
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Affiliation(s)
- Leslie Velasco
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02459, USA.
| | - Aniqa N Islam
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02459, USA.
| | - Koustav Kundu
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02459, USA.
| | - Aidan Oi
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02459, USA.
| | - Björn M Reinhard
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02459, USA.
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2
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Zhang Y, Naguro I, Ryuno H, Herr A. Contact Blot: Microfluidic Control and Measurement of Cell-Cell Contact State to Assess Contact-Inhibited ERK Signaling. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.11.06.565857. [PMID: 37986875 PMCID: PMC10659358 DOI: 10.1101/2023.11.06.565857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Extracellular signal-regulated kinase (ERK) signaling is essential to regulated cell behaviors, including cell proliferation, differentiation, and apoptosis. The influence of cell-cell contacts on ERK signaling is central to epithelial cells, yet few studies have sought to understand the same in cancer cells, particularly with single-cell resolution. To acquire same-cell measurements of both phenotypic (cell-contact state) and targeted-protein profile (ERK phosphorylation), we prepend high-content, whole-cell imaging prior to endpoint cellular-resolution western blot analyses for each of hundreds of individual HeLa cancer cells cultured on that same chip, which we call contact Blot. By indexing the phosphorylation level of ERK in each cell or cell-cluster to the imaged cell-contact state, we compare ERK signaling between isolated and in-contact cells. We observe attenuated (~2×) ERK signaling in HeLa cells which are in-contact versus isolated. Attenuation is sustained when the HeLa cells are challenged with hyperosmotic stress. Our findings show the impact of cell-cell contacts on ERK activation with isolated and in-contact cells, while introducing a multi omics tool for control and scrutiny of cell-cell interactions.
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3
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Mayer I, Karimian T, Gordiyenko K, Angelin A, Kumar R, Hirtz M, Mikut R, Reischl M, Stegmaier J, Zhou L, Ma R, Nienhaus GU, Rabe KS, Lanzerstorfer P, Domínguez CM, Niemeyer CM. Surface-Patterned DNA Origami Rulers Reveal Nanoscale Distance Dependency of the Epidermal Growth Factor Receptor Activation. NANO LETTERS 2024; 24:1611-1619. [PMID: 38267020 PMCID: PMC10853960 DOI: 10.1021/acs.nanolett.3c04272] [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: 11/06/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 01/26/2024]
Abstract
The nanoscale arrangement of ligands can have a major effect on the activation of membrane receptor proteins and thus cellular communication mechanisms. Here we report on the technological development and use of tailored DNA origami-based molecular rulers to fabricate "Multiscale Origami Structures As Interface for Cells" (MOSAIC), to enable the systematic investigation of the effect of the nanoscale spacing of epidermal growth factor (EGF) ligands on the activation of the EGF receptor (EGFR). MOSAIC-based analyses revealed that EGF distances of about 30-40 nm led to the highest response in EGFR activation of adherent MCF7 and Hela cells. Our study emphasizes the significance of DNA-based platforms for the detailed investigation of the molecular mechanisms of cellular signaling cascades.
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Affiliation(s)
- Ivy Mayer
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Tina Karimian
- School
of Engineering, University of Applied Sciences
Upper Austria, 4600 Wels, Austria
| | - Klavdiya Gordiyenko
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Alessandro Angelin
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Ravi Kumar
- Institute
of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Michael Hirtz
- Institute
of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Ralf Mikut
- Institute
for Automation and Applied Informatics (IAI), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Markus Reischl
- Institute
for Automation and Applied Informatics (IAI), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Johannes Stegmaier
- Institute
for Automation and Applied Informatics (IAI), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
- Institute
of Imaging and Computer Vision, RWTH Aachen
University, 52074 Aachen, Germany
| | - Lu Zhou
- Institute
of Applied Physics (APH), Karlsruhe Institute
of Technology (KIT), 76049 Karlsruhe, Germany
| | - Rui Ma
- Institute
of Applied Physics (APH), Karlsruhe Institute
of Technology (KIT), 76049 Karlsruhe, Germany
| | - Gerd Ulrich Nienhaus
- Institute
of Applied Physics (APH), Karlsruhe Institute
of Technology (KIT), 76049 Karlsruhe, Germany
- Institute
of Biological and Chemical Systems (IBCS) and Institute of Nanotechnology
(INT), Karlsruhe Institute of Technology
(KIT), 76021 Karlsruhe, Germany
- Department
of Physics, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Kersten S. Rabe
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Peter Lanzerstorfer
- School
of Engineering, University of Applied Sciences
Upper Austria, 4600 Wels, Austria
| | - Carmen M. Domínguez
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Christof M. Niemeyer
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
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4
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Ferreira MFS, Brambilla G, Thévenaz L, Feng X, Zhang L, Sumetsky M, Jones C, Pedireddy S, Vollmer F, Dragic PD, Henderson-Sapir O, Ottaway DJ, Strupiechonski E, Hernandez-Cardoso GG, Hernandez-Serrano AI, González FJ, Castro Camus E, Méndez A, Saccomandi P, Quan Q, Xie Z, Reinhard BM, Diem M. Roadmap on optical sensors. JOURNAL OF OPTICS (2010) 2024; 26:013001. [PMID: 38116399 PMCID: PMC10726224 DOI: 10.1088/2040-8986/ad0e85] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 06/09/2023] [Accepted: 11/21/2023] [Indexed: 12/21/2023]
Abstract
Optical sensors and sensing technologies are playing a more and more important role in our modern world. From micro-probes to large devices used in such diverse areas like medical diagnosis, defence, monitoring of industrial and environmental conditions, optics can be used in a variety of ways to achieve compact, low cost, stand-off sensing with extreme sensitivity and selectivity. Actually, the challenges to the design and functioning of an optical sensor for a particular application requires intimate knowledge of the optical, material, and environmental properties that can affect its performance. This roadmap on optical sensors addresses different technologies and application areas. It is constituted by twelve contributions authored by world-leading experts, providing insight into the current state-of-the-art and the challenges their respective fields face. Two articles address the area of optical fibre sensors, encompassing both conventional and specialty optical fibres. Several other articles are dedicated to laser-based sensors, micro- and nano-engineered sensors, whispering-gallery mode and plasmonic sensors. The use of optical sensors in chemical, biological and biomedical areas is discussed in some other papers. Different approaches required to satisfy applications at visible, infrared and THz spectral regions are also discussed.
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Affiliation(s)
| | | | | | - Xian Feng
- Jiangsu Normal University, People’s Republic of China
| | - Lei Zhang
- Zhejiang University, People’s Republic of China
| | - Misha Sumetsky
- Aston Institute of Photonic Technologies, Aston University, Birmingham, United Kingdom
| | - Callum Jones
- Department of Physics and Astronomy, Living Systems Institute, University of Exeter, United Kingdom
| | - Srikanth Pedireddy
- Department of Physics and Astronomy, Living Systems Institute, University of Exeter, United Kingdom
| | - Frank Vollmer
- Department of Physics and Astronomy, Living Systems Institute, University of Exeter, United Kingdom
| | - Peter D Dragic
- University of Illinois at Urbana-Champaign, United States of America
| | - Ori Henderson-Sapir
- Department of Physics and Institute of Photonics and Advanced Sensing, The University of Adelaide, SA, Australia
- OzGrav, University of Adelaide, Adelaide, SA, Australia
- Mirage Photonics, Oaklands Park, SA, Australia
| | - David J Ottaway
- Department of Physics and Institute of Photonics and Advanced Sensing, The University of Adelaide, SA, Australia
- OzGrav, University of Adelaide, Adelaide, SA, Australia
| | | | | | | | | | | | | | - Paola Saccomandi
- Department of Mechanical Engineering, Politecnico di Milano, Italy
| | - Qimin Quan
- NanoMosaic Inc., United States of America
| | - Zhongcong Xie
- Massachusetts General Hospital and Harvard Medical School, United States of America
| | - Björn M Reinhard
- Department of Chemistry and The Photonics Center, Boston University, United States of America
| | - Max Diem
- Northeastern University and CIRECA LLC, United States of America
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5
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Mehmood K, Wilczek MP, DuShane JK, Parent MT, Mayberry CL, Wallace JN, Levasseur FL, Fong TM, Hess ST, Maginnis MS. Dynamics and Patterning of 5-Hydroxytryptamine 2 Subtype Receptors in JC Polyomavirus Entry. Viruses 2022; 14:v14122597. [PMID: 36560603 PMCID: PMC9782046 DOI: 10.3390/v14122597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/16/2022] [Accepted: 11/18/2022] [Indexed: 11/24/2022] Open
Abstract
The organization and dynamics of plasma membrane receptors are a critical link in virus-receptor interactions, which finetune signaling efficiency and determine cellular responses during infection. Characterizing the mechanisms responsible for the active rearrangement and clustering of receptors may aid in developing novel strategies for the therapeutic treatment of viruses. Virus-receptor interactions are poorly understood at the nanoscale, yet they present an attractive target for the design of drugs and for the illumination of viral infection and pathogenesis. This study utilizes super-resolution microscopy and related techniques, which surpass traditional microscopy resolution limitations, to provide both a spatial and temporal assessment of the interactions of human JC polyomavirus (JCPyV) with 5-hydroxytrypamine 2 receptors (5-HT2Rs) subtypes during viral entry. JCPyV causes asymptomatic kidney infection in the majority of the population and can cause fatal brain disease, and progressive multifocal leukoencephalopathy (PML), in immunocompromised individuals. Using Fluorescence Photoactivation Localization Microscopy (FPALM), the colocalization of JCPyV with 5-HT2 receptor subtypes (5-HT2A, 5-HT2B, and 5-HT2C) during viral attachment and viral entry was analyzed. JCPyV was found to significantly enhance the clustering of 5-HT2 receptors during entry. Cluster analysis of infected cells reveals changes in 5-HT2 receptor cluster attributes, and radial distribution function (RDF) analyses suggest a significant increase in the aggregation of JCPyV particles colocalized with 5-HT2 receptor clusters in JCPyV-infected samples. These findings provide novel insights into receptor patterning during viral entry and highlight improved technologies for the future development of therapies for JCPyV infection as well as therapies for diseases involving 5-HT2 receptors.
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Affiliation(s)
- Kashif Mehmood
- Department of Molecular and Biomedical Sciences, The University of Maine, Orono, ME 04469, USA
| | - Michael P. Wilczek
- Department of Molecular and Biomedical Sciences, The University of Maine, Orono, ME 04469, USA
| | - Jeanne K. DuShane
- Department of Molecular and Biomedical Sciences, The University of Maine, Orono, ME 04469, USA
| | - Matthew T. Parent
- Department of Physics & Astronomy, The University of Maine, Orono, ME 04469, USA
| | - Colleen L. Mayberry
- Department of Molecular and Biomedical Sciences, The University of Maine, Orono, ME 04469, USA
| | - Jaqulin N. Wallace
- Department of Physics & Astronomy, The University of Maine, Orono, ME 04469, USA
| | - Francois L. Levasseur
- Department of Molecular and Biomedical Sciences, The University of Maine, Orono, ME 04469, USA
| | - Tristan M. Fong
- Department of Molecular and Biomedical Sciences, The University of Maine, Orono, ME 04469, USA
| | - Samuel T. Hess
- Department of Physics & Astronomy, The University of Maine, Orono, ME 04469, USA
- Graduate School of Biomedical Science and Engineering, The University of Maine, Orono, ME 04469, USA
- Correspondence: (S.T.H.); (M.S.M.)
| | - Melissa S. Maginnis
- Department of Molecular and Biomedical Sciences, The University of Maine, Orono, ME 04469, USA
- Graduate School of Biomedical Science and Engineering, The University of Maine, Orono, ME 04469, USA
- Correspondence: (S.T.H.); (M.S.M.)
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6
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Zhang S, Ouyang T, Reinhard BM. Multivalent Ligand-Nanoparticle Conjugates Amplify Reactive Oxygen Species Second Messenger Generation and Enhance Epidermal Growth Factor Receptor Phosphorylation. Bioconjug Chem 2022; 33:1716-1728. [PMID: 35993676 PMCID: PMC9815836 DOI: 10.1021/acs.bioconjchem.2c00335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The epidermal growth factor (EGF) receptor (EGFR) is heterogeneously distributed on the cellular surface and enriched in clusters with diameters of tens of nanometers. Multivalent presentation of EGF ligand on nanoparticles (NPs) provides an approach for controlling and amplifying the local activation of EGFR in these clusters. Reactive oxygen species (ROS) have been indicated to play a role in the regulation of EGFR activation as second messengers, but the effect of nanoconjugation on EGF-mediated ROS formation and ROS-induced EGFR activation is not well established. The goal of this manuscript is to characterize the multivalent enhancement of EGF-induced ROS formation and to test its effect on EGFR phosphorylation in breast cancer cell models using gold (Au) NPs with a diameter of 81 ± 1 nm functionalized with two different EGF ligand densities (12 ± 7 EGF/NP (NP-EGF12) and 87 ± 6 EGF/NP (NP-EGF87)). In the EGFR overexpressing cell lines MDA-MB-231 and MDA-MB-468, NP-EGF87 achieved a measurable multivalent enhancement of ROS that peaked at concentrations c ROSmax ≤ 25 pM and that were EGFR and nicotinamide adenine dinucleotide phosphate oxidase (NOX) dependent. NP-EGF12 failed to generate comparable ROS levels as NP-EGF87 in the investigated NP input concentration range (0-100 pM). In cells with nearly identical numbers of bound NP-EGF87 and NP-EGF12, the ROS levels for NP-EGF87 were systematically higher, indicating that the multivalent enhancement is exclusively related not only to avidity but also to a stronger stimulation per NP. Importantly, the increase in EGF-induced ROS formation associated with EGF nanoconjugation at c ROSmax resulted in a measurable gain in EGFR phosphorylation, confirming that ROS generation contributes to the multivalent enhancement of EGFR activation in response to NP-EGF87.
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Affiliation(s)
- Sandy Zhang
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02215
| | - Tianhong Ouyang
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02215
| | - Björn M. Reinhard
- Department of Chemistry and The Photonics Center, Boston University, Boston, MA 02215
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7
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An X, Kays JC, Lightcap IV, Ouyang T, Dennis AM, Reinhard BM. Wavelength-Dependent Bifunctional Plasmonic Photocatalysis in Au/Chalcopyrite Hybrid Nanostructures. ACS NANO 2022; 16:6813-6824. [PMID: 35349253 PMCID: PMC9676104 DOI: 10.1021/acsnano.2c01706] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Excited, or "hot" charge carrier generation and transfer driven by the decay of localized surface plasmon resonances (LSPRs) are key steps in plasmonic photocatalysis. Hybrid structures that contain both metal and semiconductor building blocks facilitate the extraction of reactive charge carriers and their utilization for photoelectrocatalysis. Additional functionality arises from hybrid structures that combine noble metal nanostructures with semiconductor components, such as chalcopyrite (CuFeS2) nanocrystals (NCs), which by themselves support quasistatic resonances. In this work, we use a hybrid membrane to integrate Au nanorods (NRs) with a longitudinal LSPR at 745 nm and CuFeS2 NCs with a resonance peak at 490 nm into water-stable nanocomposites for robust and bifunctional photocatalysis of oxygen and hydrogen evolution reactions in a wavelength-dependent manner. Excitation of NRs or NCs in the nanocomposite correlates with increased hydrogen or oxygen evolution, respectively, consistent with a light-driven electron transfer between the metal and semiconductor building blocks, the direction of which depends on the wavelength. The bifunctional photoreactivity of the nanocomposite is enhanced by Cu(I)/Cu(II)-assisted catalysis on the surface of the NCs.
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Affiliation(s)
- Xingda An
- Department of Chemistry, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Joshua C. Kays
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Ian V. Lightcap
- Center for Sustainable Energy, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Tianhong Ouyang
- Department of Chemistry, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Allison M. Dennis
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Björn M. Reinhard
- Department of Chemistry, Boston University, Boston, MA 02215, USA
- The Photonics Center, Boston University, Boston, MA 02215, USA
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8
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Hartland GV. Virtual Issue on Super-Resolution Far-Field Optical Microscopy. J Phys Chem B 2021; 124:1581-1584. [PMID: 32131600 DOI: 10.1021/acs.jpcb.0c01501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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An X, Erramilli S, Reinhard BM. Plasmonic nano-antimicrobials: properties, mechanisms and applications in microbe inactivation and sensing. NANOSCALE 2021; 13:3374-3411. [PMID: 33538743 PMCID: PMC8349509 DOI: 10.1039/d0nr08353d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Bacterial, viral and fungal infections pose serious threats to human health and well-being. The continuous emergence of acute infectious diseases caused by pathogenic microbes and the rapid development of resistances against conventional antimicrobial drugs necessitates the development of new and effective strategies for the safe elimination of microbes in water, food or on surfaces, as well as for the inactivation of pathogenic microbes in human hosts. The need for new antimicrobials has triggered the development of plasmonic nano-antimicrobials that facilitate both light-dependent and -independent microbe inactivation mechanisms. This review introduces the relevant photophysical mechanisms underlying these plasmonic nano-antimicrobials, and provides an overview of how the photoresponses and materials properties of plasmonic nanostructures can be applied in microbial pathogen inactivation and sensing applications. Through a systematic analysis of the inactivation efficacies of different plasmonic nanostructures, this review outlines the current state-of-the-art in plasmonic nano-antimicrobials and defines the application space for different microbial inactivation strategies. The advantageous optical properties of plasmonic nano-antimicrobials also enhance microbial detection and sensing modalities and thus help to avoid exposure to microbial pathogens. Sensitive and fast plasmonic microbial sensing modalities and their theranostic and targeted therapeutic applications are discussed.
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Affiliation(s)
- Xingda An
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Shyamsunder Erramilli
- Department of Physics, Boston University, Boston, MA 02215, USA and The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Björn M Reinhard
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and The Photonics Center, Boston University, Boston, MA 02215, USA
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10
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Chattopadhyay S, Biteen JS. Super-Resolution Characterization of Heterogeneous Light-Matter Interactions between Single Dye Molecules and Plasmonic Nanoparticles. Anal Chem 2021; 93:430-444. [PMID: 33100005 DOI: 10.1021/acs.analchem.0c04280] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Saaj Chattopadhyay
- Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Julie S Biteen
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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11
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Maynard S, Gelmi A, Skaalure SC, Pence IJ, Lee-Reeves C, Sero JE, Whittaker TE, Stevens MM. Nanoscale Molecular Quantification of Stem Cell-Hydrogel Interactions. ACS NANO 2020; 14:17321-17332. [PMID: 33215498 PMCID: PMC7760213 DOI: 10.1021/acsnano.0c07428] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 11/17/2020] [Indexed: 05/07/2023]
Abstract
A common approach to tailoring synthetic hydrogels for regenerative medicine applications involves incorporating RGD cell adhesion peptides, yet assessing the cellular response to engineered microenvironments at the nanoscale remains challenging. To date, no study has demonstrated how RGD concentration in hydrogels affects the presentation of individual cell surface receptors. Here we studied the interaction between human mesenchymal stem cells (hMSCs) and RGD-functionalized poly(ethylene glycol) hydrogels, by correlating macro- and nanoscale single-cell interfacial quantification techniques. We quantified RGD unbinding forces on a synthetic hydrogel using single cell atomic force spectroscopy, revealing that short-term binding of hMSCs was sensitive to RGD concentration. We also performed direct stochastic optical reconstruction microscopy (dSTORM) to quantify the molecular interactions between integrin α5β1 and a biomaterial, unexpectedly revealing that increased integrin clustering at the hydrogel-cell interface correlated with fewer available RGD binding sites. Our complementary, quantitative approach uncovered mechanistic insights into specific stem cell-hydrogel interactions, where dSTORM provides nanoscale sensitivity to RGD-dependent differences in cell surface localization of integrin α5β1. Our findings reveal that it is possible to precisely determine how peptide-functionalized hydrogels interact with cells at the molecular scale, thus providing a basis to fine-tune the spatial presentation of bioactive ligands.
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Affiliation(s)
| | | | - Stacey C. Skaalure
- Department of Materials,
Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Isaac J. Pence
- Department of Materials,
Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Charlotte Lee-Reeves
- Department of Materials,
Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | | | - Thomas E. Whittaker
- Department of Materials,
Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
| | - Molly M. Stevens
- Department of Materials,
Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
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12
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Garzon Dasgupta AK, Martyanov AA, Filkova AA, Panteleev MA, Sveshnikova AN. Development of a Simple Kinetic Mathematical Model of Aggregation of Particles or Clustering of Receptors. Life (Basel) 2020; 10:E97. [PMID: 32604803 PMCID: PMC7345685 DOI: 10.3390/life10060097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 06/24/2020] [Indexed: 12/24/2022] Open
Abstract
The process of clustering of plasma membrane receptors in response to their agonist is the first step in signal transduction. The rate of the clustering process and the size of the clusters determine further cell responses. Here we aim to demonstrate that a simple 2-differential equation mathematical model is capable of quantitative description of the kinetics of 2D or 3D cluster formation in various processes. Three mathematical models based on mass action kinetics were considered and compared with each other by their ability to describe experimental data on GPVI or CR3 receptor clustering (2D) and albumin or platelet aggregation (3D) in response to activation. The models were able to successfully describe experimental data without losing accuracy after switching between complex and simple models. However, additional restrictions on parameter values are required to match a single set of parameters for the given experimental data. The extended clustering model captured several properties of the kinetics of cluster formation, such as the existence of only three typical steady states for this system: unclustered receptors, receptor dimers, and clusters. Therefore, a simple kinetic mass-action-law-based model could be utilized to adequately describe clustering in response to activation both in 2D and in 3D.
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Affiliation(s)
- Andrei K. Garzon Dasgupta
- Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie gory, 119991 Moscow, Russia; (A.K.G.D.); (A.A.M.); (A.A.F.); (M.A.P.)
- National Medical Research Centеr of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, 117198 Moscow, Russia
| | - Alexey A. Martyanov
- Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie gory, 119991 Moscow, Russia; (A.K.G.D.); (A.A.M.); (A.A.F.); (M.A.P.)
- National Medical Research Centеr of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, 117198 Moscow, Russia
- Institute for Biochemical Physics (IBCP), Russian Academy of Sciences (RAS), Russian Federation, Kosyigina 4, 119334 Moscow, Russia
- Center for Theoretical Problems of Physico-Сhemical Pharmacology, Russian Academy of Sciences, 30 Srednyaya Kalitnikovskaya str., 109029 Moscow, Russia
| | - Aleksandra A. Filkova
- Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie gory, 119991 Moscow, Russia; (A.K.G.D.); (A.A.M.); (A.A.F.); (M.A.P.)
- National Medical Research Centеr of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, 117198 Moscow, Russia
- Center for Theoretical Problems of Physico-Сhemical Pharmacology, Russian Academy of Sciences, 30 Srednyaya Kalitnikovskaya str., 109029 Moscow, Russia
| | - Mikhail A. Panteleev
- Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie gory, 119991 Moscow, Russia; (A.K.G.D.); (A.A.M.); (A.A.F.); (M.A.P.)
- National Medical Research Centеr of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, 117198 Moscow, Russia
- Center for Theoretical Problems of Physico-Сhemical Pharmacology, Russian Academy of Sciences, 30 Srednyaya Kalitnikovskaya str., 109029 Moscow, Russia
- Faculty of Biological and Medical Physics, Moscow Institute of Physics and Technology, 9 Institutskii per., 141700 Dolgoprudnyi, Russia
| | - Anastasia N. Sveshnikova
- Faculty of Physics, Lomonosov Moscow State University, 1/2 Leninskie gory, 119991 Moscow, Russia; (A.K.G.D.); (A.A.M.); (A.A.F.); (M.A.P.)
- National Medical Research Centеr of Pediatric Hematology, Oncology and Immunology named after Dmitry Rogachev, 1 Samory Mashela St, 117198 Moscow, Russia
- Center for Theoretical Problems of Physico-Сhemical Pharmacology, Russian Academy of Sciences, 30 Srednyaya Kalitnikovskaya str., 109029 Moscow, Russia
- Department of Normal Physiology, Sechenov First Moscow State Medical University, 8/2 Trubetskaya St., 119991 Moscow, Russia
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Hartland GV. Virtual Issue on Super-Resolution Far-Field Optical Microscopy. J Phys Chem A 2020; 124:1669-1672. [PMID: 32131601 DOI: 10.1021/acs.jpca.0c01500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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