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Guglielmotti V, Fuhry E, Neubert TJ, Kuhl M, Pallarola D, Balasubramanian K. Real-Time Monitoring of Cell Adhesion onto a Soft Substrate by a Graphene Impedance Biosensor. ACS Sens 2024; 9:101-109. [PMID: 38141037 DOI: 10.1021/acssensors.3c01705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2023]
Abstract
Soft substrates are interesting for many applications, ranging from mimicking the cellular microenvironment to implants. Conductive electrodes on such substrates allow the realization of flexible, elastic, and transparent sensors. Single-layer graphene as a candidate for such electrodes brings the advantage that the active area of the sensor is transparent and conformal to the underlying substrate. Here, we overcome several challenges facing the routine realization of graphene cell sensors on a canonical soft substrate, namely, poly(dimethylsiloxane) (PDMS). We have systematically studied the effect of surface energy before, during, and after the transfer of graphene. Thus, we have identified a suitable support polymer, optimal substrate (pre)treatment, and an appropriate solvent for the removal of the support. Using this procedure, we can reproducibly obtain stable and intact graphene sensors on a millimeter scale on PDMS, which can withstand continuous measurements in cell culture media for several days. From local nanomechanical measurements, we infer that the softness of the substrate is slightly affected after the graphene transfer. However, we can modulate the stiffness using PDMS with differing compositions. Finally, we show that graphene sensors on PDMS can be successfully used as soft electrodes for real-time monitoring of the cell adhesion kinetics. The routine availability of single-layer graphene electrodes on a soft substrate with tunable stiffness will open a new avenue for studies, where the PDMS-liquid interface is made conducting with minimal alteration of the intrinsic material properties such as softness, flexibility, elasticity, and transparency.
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Affiliation(s)
- Victoria Guglielmotti
- Department of Chemistry, School of Analytical Sciences Adlershof (SALSA) & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin 10099, Germany
- Instituto de Nanosistemas, Universidad Nacional de General San Martín, San Martín 1650, Provincia de Buenos Aires, Argentina
| | - Emil Fuhry
- Department of Chemistry, School of Analytical Sciences Adlershof (SALSA) & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin 10099, Germany
| | - Tilmann J Neubert
- Department of Chemistry, School of Analytical Sciences Adlershof (SALSA) & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin 10099, Germany
| | - Michel Kuhl
- Department of Chemistry, School of Analytical Sciences Adlershof (SALSA) & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin 10099, Germany
| | - Diego Pallarola
- Instituto de Nanosistemas, Universidad Nacional de General San Martín, San Martín 1650, Provincia de Buenos Aires, Argentina
| | - Kannan Balasubramanian
- Department of Chemistry, School of Analytical Sciences Adlershof (SALSA) & IRIS Adlershof, Humboldt-Universität zu Berlin, Berlin 10099, Germany
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2
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Devida JM, Herrera F, Daza Millone MA, Requejo FG, Pallarola D. Electrochemical Fine-Tuning of the Chemoresponsiveness of Langmuir-Blodgett Graphene Oxide Films. ACS Omega 2023; 8:27566-27575. [PMID: 37546598 PMCID: PMC10399176 DOI: 10.1021/acsomega.3c03220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 07/10/2023] [Indexed: 08/08/2023]
Abstract
Graphene oxide has been widely deployed in electrical sensors for monitoring physical, chemical, and biological processes. The presence of abundant oxygen functional groups makes it an ideal substrate for integrating biological functional units to assemblies. However, the introduction of this type of defects on the surface of graphene has a deleterious effect on its electrical properties. Therefore, adjusting the surface chemistry of graphene oxide is of utmost relevance for addressing the immobilization of biomolecules, while preserving its electrochemical integrity. Herein, we describe the direct immobilization of glucose oxidase onto graphene oxide-based electrodes prepared by Langmuir-Blodgett assembly. Electrochemical reduction of graphene oxide allowed to control its surface chemistry and, by this, regulate the nature and density of binding sites for the enzyme and the overall responsiveness of the Langmuir-Blodgett biofilm. X-ray photoelectron spectroscopy, surface plasmon resonance, and electrochemical measurements were used to characterize the compositional and functional features of these biointerfaces. Covalent binding between amine groups on glucose oxidase and epoxy and carbonyl groups on the surface of graphene oxide was successfully used to build up stable and active enzymatic assemblies. This approach constitutes a simple, quick, and efficient route to locally address functional proteins at interfaces without the need for additives or complex modifiers to direct the adsorption process.
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Affiliation(s)
- Juan M. Devida
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), Universidad Nacional de La Plata,
CONICET, CC 16 Suc. 4, La Plata 1900, Argentina
| | - Facundo Herrera
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), Universidad Nacional de La Plata,
CONICET, CC 16 Suc. 4, La Plata 1900, Argentina
| | - M. Antonieta Daza Millone
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), Universidad Nacional de La Plata,
CONICET, CC 16 Suc. 4, La Plata 1900, Argentina
| | - Félix G. Requejo
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas
(INIFTA), Universidad Nacional de La Plata,
CONICET, CC 16 Suc. 4, La Plata 1900, Argentina
| | - Diego Pallarola
- Instituto
de Nanosistemas, Universidad Nacional de
General San Martín, Av. 25 de Mayo y Francia, San Martín 1650, Argentina
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3
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Guglielmotti V, Saffioti NA, Tohmé AL, Gambarotta M, Corthey G, Pallarola D. A portable and affordable aligner for the assembly of microfluidic devices. HardwareX 2022; 12:e00348. [PMID: 36105917 PMCID: PMC9465365 DOI: 10.1016/j.ohx.2022.e00348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/09/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
The incorporation of sophisticated capabilities within microfluidic devices often requires the assembly of different layers in a correct arrangement. For example, when it is desired to include electrodes inside microfluidic channels or to create 3D microfluidic structures. However, the alignment between different substrates at the microscale requires expensive equipment not available for all research groups. In this work, we present an affordable, compact and portable aligner for assembling multilayered composite microfluidic chips. The instrument is composed of aluminum machined pieces combined with precision stages and includes a digital microscope with a LED illumination system for monitoring the alignment process. An interchangeable holder was created for substrate fixing, allowing the bonding of PDMS with other materials. Microscopic visualization is achieved through any device with internet access, avoiding the need of a computer attached to the aligner. To test the performance of the aligner, the center of an indium tin oxide microelectrode on a glass substrate was aligned with the center of a microchannel in a PDMS chip. The accuracy and precision of the instrument are suited for many microfluidic applications. The small and inexpensive design of the aligner makes it a cost-effective option for small groups working in microfluidics.
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4
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Barella M, Violi IL, Gargiulo J, Martinez LP, Goschin F, Guglielmotti V, Pallarola D, Schlücker S, Pilo-Pais M, Acuna GP, Maier SA, Cortés E, Stefani FD. In Situ Photothermal Response of Single Gold Nanoparticles through Hyperspectral Imaging Anti-Stokes Thermometry. ACS Nano 2021; 15:2458-2467. [PMID: 32941001 DOI: 10.1021/acsnano.0c06185] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Several fields of applications require a reliable characterization of the photothermal response and heat dissipation of nanoscopic systems, which remains a challenging task for both modeling and experimental measurements. Here, we present an implementation of anti-Stokes thermometry that enables the in situ photothermal characterization of individual nanoparticles (NPs) from a single hyperspectral photoluminescence confocal image. The method is label-free, potentially applicable to any NP with detectable anti-Stokes emission, and does not require any prior information about the NP itself or the surrounding media. With it, we first studied the photothermal response of spherical gold NPs of different sizes on glass substrates, immersed in water, and found that heat dissipation is mainly dominated by the water for NPs larger than 50 nm. Then, the role of the substrate was studied by comparing the photothermal response of 80 nm gold NPs on glass with sapphire and graphene, two materials with high thermal conductivity. For a given irradiance level, the NPs reach temperatures 18% lower on sapphire and 24% higher on graphene than on bare glass. The fact that the presence of a highly conductive material such as graphene leads to a poorer thermal dissipation demonstrates that interfacial thermal resistances play a very significant role in nanoscopic systems and emphasize the need for in situ experimental thermometry techniques. The developed method will allow addressing several open questions about the role of temperature in plasmon-assisted applications, especially ones where NPs of arbitrary shapes are present in complex matrixes and environments.
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Affiliation(s)
- Mariano Barella
- Centro de Investigaciones en Bionanociencias (CIBION), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2390, 1425, CABA Argentina
| | - Ianina L Violi
- Centro de Investigaciones en Bionanociencias (CIBION), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2390, 1425, CABA Argentina
- Instituto de Nanosistemas, UNSAM-CONICET, Avenida 25 de Mayo 1021, San Martín, 1650, Argentina
| | - Julian Gargiulo
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80799, München, Germany
| | - Luciana P Martinez
- Centro de Investigaciones en Bionanociencias (CIBION), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2390, 1425, CABA Argentina
| | - Florian Goschin
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80799, München, Germany
| | - Victoria Guglielmotti
- Instituto de Nanosistemas, UNSAM-CONICET, Avenida 25 de Mayo 1021, San Martín, 1650, Argentina
| | - Diego Pallarola
- Instituto de Nanosistemas, UNSAM-CONICET, Avenida 25 de Mayo 1021, San Martín, 1650, Argentina
| | - Sebastian Schlücker
- Physical Chemistry I, Department of Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Duisburg-Essen 45141, Germany
| | - Mauricio Pilo-Pais
- Department of Physics, University of Fribourg, Chemin du Musée 3, Fribourg CH-1700, Switzerland
| | - Guillermo P Acuna
- Department of Physics, University of Fribourg, Chemin du Musée 3, Fribourg CH-1700, Switzerland
| | - Stefan A Maier
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80799, München, Germany
- The Blackett Laboratory, Department of Physics, Imperial College London, London SW72AZ, United Kingdom
| | - Emiliano Cortés
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80799, München, Germany
| | - Fernando D Stefani
- Centro de Investigaciones en Bionanociencias (CIBION), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2390, 1425, CABA Argentina
- Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Int. Güiraldes 2620, 1428, CABA Argentina
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5
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Saffioti NA, Cavalcanti-Adam EA, Pallarola D. Biosensors for Studies on Adhesion-Mediated Cellular Responses to Their Microenvironment. Front Bioeng Biotechnol 2020; 8:597950. [PMID: 33262979 PMCID: PMC7685988 DOI: 10.3389/fbioe.2020.597950] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 10/12/2020] [Indexed: 12/28/2022] Open
Abstract
Cells interact with their microenvironment by constantly sensing mechanical and chemical cues converting them into biochemical signals. These processes allow cells to respond and adapt to changes in their environment, and are crucial for most cellular functions. Understanding the mechanism underlying this complex interplay at the cell-matrix interface is of fundamental value to decipher key biochemical and mechanical factors regulating cell fate. The combination of material science and surface chemistry aided in the creation of controllable environments to study cell mechanosensing and mechanotransduction. Biologically inspired materials tailored with specific bioactive molecules, desired physical properties and tunable topography have emerged as suitable tools to study cell behavior. Among these materials, synthetic cell interfaces with built-in sensing capabilities are highly advantageous to measure biophysical and biochemical interaction between cells and their environment. In this review, we discuss the design of micro and nanostructured biomaterials engineered not only to mimic the structure, properties, and function of the cellular microenvironment, but also to obtain quantitative information on how cells sense and probe specific adhesive cues from the extracellular domain. This type of responsive biointerfaces provides a readout of mechanics, biochemistry, and electrical activity in real time allowing observation of cellular processes with molecular specificity. Specifically designed sensors based on advanced optical and electrochemical readout are discussed. We further provide an insight into the emerging role of multifunctional micro and nanosensors to control and monitor cell functions by means of material design.
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Affiliation(s)
- Nicolás Andrés Saffioti
- Instituto de Nanosistemas, Universidad Nacional de General San Martín, San Martín, Argentina
| | | | - Diego Pallarola
- Instituto de Nanosistemas, Universidad Nacional de General San Martín, San Martín, Argentina
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6
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Pallarola D, Bochen A, Guglielmotti V, Oswald TA, Kessler H, Spatz JP. Highly Ordered Gold Nanopatterned Indium Tin Oxide Electrodes for Simultaneous Optical and Electrochemical Probing Cell Interactions. Anal Chem 2017; 89:10054-10062. [DOI: 10.1021/acs.analchem.7b02743] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Diego Pallarola
- Instituto
de Nanosistemas, Universidad Nacional de General San Martín, Av. 25 de Mayo y Francia, San Martín 1650, Argentina
| | - Alexander Bochen
- Department
of Chemistry, Institute for Advanced Study and Center for Integrated Protein Science, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Victoria Guglielmotti
- Instituto
de Nanosistemas, Universidad Nacional de General San Martín, Av. 25 de Mayo y Francia, San Martín 1650, Argentina
| | - Tabea A. Oswald
- Department
of Cellular Biophysics, Max-Planck-Institute for Medical Research, Heisenbergstr. 3, 70569 Stuttgart, Germany
- Department
of Biophysical Chemistry, Institute of Physical Chemistry, Heidelberg University, 69120 Heidelberg, Germany
| | - Horst Kessler
- Department
of Chemistry, Institute for Advanced Study and Center for Integrated Protein Science, Technische Universität München, Lichtenbergstr. 4, 85747 Garching, Germany
| | - Joachim P. Spatz
- Department
of Cellular Biophysics, Max-Planck-Institute for Medical Research, Heisenbergstr. 3, 70569 Stuttgart, Germany
- Department
of Biophysical Chemistry, Institute of Physical Chemistry, Heidelberg University, 69120 Heidelberg, Germany
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7
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Pallarola D, Platzman I, Bochen A, Cavalcanti-Adam EA, Axmann M, Kessler H, Geiger B, Spatz JP. Focal adhesion stabilization by enhanced integrin-cRGD binding affinity. ACTA ACUST UNITED AC 2017. [DOI: 10.1515/bnm-2016-0014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
AbstractIn this study we investigate the impact of ligand presentation by various molecular spacers on integrin-based focal adhesion formation. Gold nanoparticles (AuNPs) arranged in hexagonal patterns were biofunctionalized with the same ligand head group, cyclic Arg-Gly-Asp [
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8
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Piccinini E, Pallarola D, Battaglini F, Azzaroni O. Recognition-driven assembly of self-limiting supramolecular protein nanoparticles displaying enzymatic activity. Chem Commun (Camb) 2015; 51:14754-7. [DOI: 10.1039/c5cc05837f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We report the recognition-driven assembly of self-limiting protein nanoparticles displaying enzymatic activity.
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Affiliation(s)
- Esteban Piccinini
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) – Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata – CONICET
- 1900 La Plata
- Argentina
| | - Diego Pallarola
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) – Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata – CONICET
- 1900 La Plata
- Argentina
| | - Fernando Battaglini
- INQUIMAE
- Departamento de Química Inorgánica
- Analítica y Química Física
- Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires
- Ciudad Universitaria
| | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) – Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata – CONICET
- 1900 La Plata
- Argentina
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9
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Cortez ML, Marmisollé W, Pallarola D, Pietrasanta LI, Murgida DH, Ceolín M, Azzaroni O, Battaglini F. Effect of gold nanoparticles on the structure and electron-transfer characteristics of glucose oxidase redox polyelectrolyte-surfactant complexes. Chemistry 2014; 20:13366-74. [PMID: 25171096 DOI: 10.1002/chem.201402707] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Indexed: 11/10/2022]
Abstract
Efficient electrical communication between redox proteins and electrodes is a critical issue in the operation and development of amperometric biosensors. The present study explores the advantages of a nanostructured redox-active polyelectrolyte-surfactant complex containing [Os(bpy)2Clpy](2+) (bpy=2,2'-bipyridine, py= pyridine) as the redox centers and gold nanoparticles (AuNPs) as nanodomains for boosting the electron-transfer propagation throughout the assembled film in the presence of glucose oxidase (GOx). Film structure was characterized by grazing-incidence small-angle X-ray scattering (GISAXS) and atomic force microscopy (AFM), GOx incorporation was followed by surface plasmon resonance (SPR) and quartz-crystal microbalance with dissipation (QCM-D), whereas Raman spectroelectrochemistry and electrochemical studies confirmed the ability of the entrapped gold nanoparticles to enhance the electron-transfer processes between the enzyme and the electrode surface. Our results show that nanocomposite films exhibit five-fold increase in current response to glucose compared with analogous supramolecular AuNP-free films. The introduction of colloidal gold promotes drastic mesostructural changes in the film, which in turn leads to a rigid, amorphous interfacial architecture where nanoparticles, redox centers, and GOx remain in close proximity, thus improving the electron-transfer process.
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Affiliation(s)
- M Lorena Cortez
- INQUIMAE - Departamento de Química Inorgánica Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, CONICET, Ciudad Universitaria, Pabellón 2, C1428EHA Buenos Aires (Argentina); Instituto de Investigaciones Fisicoquímicas Tas y Aplicadas (INIFTA), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, CC 16 Suc. 4 (1900) La Plata (Argentina)
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10
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Pallarola D, Bochen A, Boehm H, Rechenmacher F, Sobahi TR, Spatz JP, Kessler H. Interface Immobilization Chemistry of cRGD-based Peptides Regulates Integrin Mediated Cell Adhesion. Adv Funct Mater 2014; 24:943-956. [PMID: 25810710 PMCID: PMC4368046 DOI: 10.1002/adfm.201302411] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 08/28/2013] [Indexed: 05/29/2023]
Abstract
The interaction of specific surface receptors of the integrin family with different extracellular matrix-based ligands is of utmost importance for the cellular adhesion process. A ligand consists of an integrin-binding group, here cyclic RGDfX, a spacer molecule that lifts the integrin-binding group from the surface and a surface anchoring group. c(-RGDfX-) peptides are bound to gold nanoparticle structured surfaces via polyproline, polyethylene glycol or aminohexanoic acid containing spacers of different lengths. Although keeping the integrin-binding c(-RGDfX-) peptides constant for all compounds, changes of the ligand's spacer chemistry and length reveal significant differences in cell adhesion activation and focal adhesion formation. Polyproline-based peptides demonstrate improved cell adhesion kinetics and focal adhesion formation compared with common aminohexanoic acid or polyethylene glycol spacers. Binding activity can additionally be improved by applying ligands with two head groups, inducing a multimeric effect. This study gives insights into spacer-based differences in integrin-driven cell adhesion processes and remarkably highlights the polyproline-based spacers as suitable ligand-presenting templates for surface functionalization.
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Affiliation(s)
- Diego Pallarola
- Department of New Materials and Biosystems, Max Planck Institute for intelligent Systems Heisenbergstr. 3, 70569, Stuttgart, Germany ; Department of Biophysical Chemistry, University of Heidelberg 69120, Heidelberg, Germany
| | - Alexander Bochen
- Institute for Advanced Study and Center for Integrated Protein Science Department Chemie, Technische Universität München Lichtenbergstr. 4, 85747, Garching, Germany
| | - Heike Boehm
- Department of New Materials and Biosystems, Max Planck Institute for intelligent Systems Heisenbergstr. 3, 70569, Stuttgart, Germany ; Department of Biophysical Chemistry, University of Heidelberg 69120, Heidelberg, Germany ; CSF Biomaterials and Cellular Biophysics, Max Planck Institute for Intelligent Systems Heisenbergstr. 3, 70569, Stuttgart, Germany
| | - Florian Rechenmacher
- Institute for Advanced Study and Center for Integrated Protein Science Department Chemie, Technische Universität München Lichtenbergstr. 4, 85747, Garching, Germany
| | - Tariq R Sobahi
- Chemistry Department Faculty of Science, King Abdulaziz University P.O. Box 80203, Jeddah 21589, Saudi Arabia
| | - Joachim P Spatz
- Department of New Materials and Biosystems, Max Planck Institute for intelligent Systems Heisenbergstr. 3, 70569, Stuttgart, Germany
| | - Horst Kessler
- Institute for Advanced Study and Center for Integrated Protein Science Department Chemie, Technische Universität München Lichtenbergstr. 4, 85747, Garching, Germany ; Chemistry Department Faculty of Science, King Abdulaziz University P.O. Box 80203, Jeddah 21589, Saudi Arabia
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11
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Platzman I, Muth CA, Lee-Thedieck C, Pallarola D, Atanasova R, Louban I, Altrock E, Spatz JP. Surface Properties of Nanostructured Bio-Active Interfaces: Impacts of Surface Stiffness and Topography on Cell-Surface Interactions. RSC Adv 2013; 3:13293-13303. [PMID: 33791090 PMCID: PMC8009309 DOI: 10.1039/c3ra41579a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Due to their ability to confer key functions of the native extracellular matrix (ECM) poly(ethylene glycol) (PEG)-based and PEG-modified materials have been extensively used as biocompatible and biofunctionalized substrate systems to study the influence of environmental parameters on cell adhesion in vitro. Given wide-ranging recent evidence that ECM compliance influences a variety of cell functions, the detailed determination and characterization of the specific PEG surface characteristics including topography, stiffness and chemistry is required. Here, we studied two frequently used bio-active interfaces - PEG-based and PEG-modified surfaces - to elucidate the differences between the physical surface properties, which cells can sense and respond to. For this purpose, two sets of surfaces were synthesized: the first set consisted of nanopatterned glass surfaces containing cRGD-functionalized gold nanoparticles surrounded by a passivated PEG-silane layer and the second set consisted of PEG-diacrylate (PEG-DA) hydrogels decorated with cRGD-functionalized gold nanoparticlesAlthough the two sets of nanostructured materials compared here were highly similar in terms of density and geometrical distribution of the presented bio-ligands as well as in terms of mechanical bulk properties, the topography and mechanical properties of the surfaces were found to be substantially different and are described in detail. In comparison to very stiff and ultrasmooth surface properties of the PEG-passivated glasses, the mechanical properties of PEG-DA surfaces in the biologically relevant stiffness range, together with the increased surface roughness at micro- and nanoscale levels have the potential to affect cell behavior. This potential was verified by studying the adhesive behavior of hematopoietic KG-1a and rat embryonic fibroblast (REF52) cells on both surfaces.
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Affiliation(s)
- Ilia Platzman
- Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems Heisenbergstr. 3, Stuttgart 70569, Germany & Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69120, Germany
| | - Christine Anna Muth
- Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems Heisenbergstr. 3, Stuttgart 70569, Germany & Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69120, Germany
| | - Cornelia Lee-Thedieck
- Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems Heisenbergstr. 3, Stuttgart 70569, Germany & Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69120, Germany
- Karlsruhe Institute of Technology (KIT), Institute of Functional Interfaces, Hermann-von Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Diego Pallarola
- Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems Heisenbergstr. 3, Stuttgart 70569, Germany & Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69120, Germany
| | - Ralitsa Atanasova
- Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems Heisenbergstr. 3, Stuttgart 70569, Germany & Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69120, Germany
| | - Ilia Louban
- Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems Heisenbergstr. 3, Stuttgart 70569, Germany & Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69120, Germany
| | - Eva Altrock
- Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems Heisenbergstr. 3, Stuttgart 70569, Germany & Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69120, Germany
| | - Joachim P Spatz
- Department of New Materials and Biosystems, Max Planck Institute for Intelligent Systems Heisenbergstr. 3, Stuttgart 70569, Germany & Department of Biophysical Chemistry, University of Heidelberg, Heidelberg 69120, Germany
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12
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Bochen A, Marelli UK, Otto E, Pallarola D, Mas-Moruno C, Di Leva FS, Boehm H, Spatz JP, Novellino E, Kessler H, Marinelli L. Biselectivity of isoDGR peptides for fibronectin binding integrin subtypes α5β1 and αvβ6: conformational control through flanking amino acids. J Med Chem 2013; 56:1509-19. [PMID: 23362923 DOI: 10.1021/jm301221x] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Integrins are the major class of cell adhesion proteins. Their interaction with different ligands of the extracellular matrix is diverse. To get more insight into these interactions, artificial ligands endowed with a well-defined activity/selectivity profile are necessary. Herein, we present a library of cyclic pentapeptides, based on our previously reported peptide motif c(-phg-isoDGR-X-), in which high activity toward fibronectin binding integrins α5β1 and αvβ6 and not on vitronectin binding integrins αvβ3 and αvβ5 has been achieved by changing the flanking amino acids. The structure of the most promising candidates has been determined using a combined approach of NMR, distance geometry, and molecular dynamics simulations, and docking studies have been further used to elucidate the peptide-integrin interactions at the molecular level. The peptides' binding affinity has been characterized by enzyme linked immunosorbent assay experiments, and the results have been verified by cell adhesion experiments on specifically functionalized surfaces.
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Affiliation(s)
- Alexander Bochen
- Institute for Advanced Study and Center of Integrated Protein Science, Department Chemie, Technische Universität München, Lichtenbergstrasse 4, 85747 Garching, Germany
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Cortez ML, Pallarola D, Ceolín M, Azzaroni O, Battaglini F. Electron Transfer Properties of Dual Self-Assembled Architectures Based on Specific Recognition and Electrostatic Driving Forces: Its Application To Control Substrate Inhibition in Horseradish Peroxidase-Based Sensors. Anal Chem 2013; 85:2414-22. [DOI: 10.1021/ac303424t] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- M. Lorena Cortez
- INQUIMAE - Departamento de Química
Inorgánica, Analítica
y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria -
Pabellón 2 - C1428EHA Buenos Aires - Argentina
- Instituto de Investigaciones
Fisicoquímicas Teóricas y Aplicadas (INIFTA) - Departamento de Química - Facultad
de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, CC 16 Suc. 4 (1900) La Plata - Argentina
| | - Diego Pallarola
- Instituto de Investigaciones
Fisicoquímicas Teóricas y Aplicadas (INIFTA) - Departamento de Química - Facultad
de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, CC 16 Suc. 4 (1900) La Plata - Argentina
| | - Marcelo Ceolín
- Instituto de Investigaciones
Fisicoquímicas Teóricas y Aplicadas (INIFTA) - Departamento de Química - Facultad
de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, CC 16 Suc. 4 (1900) La Plata - Argentina
| | - Omar Azzaroni
- Instituto de Investigaciones
Fisicoquímicas Teóricas y Aplicadas (INIFTA) - Departamento de Química - Facultad
de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, CC 16 Suc. 4 (1900) La Plata - Argentina
| | - Fernando Battaglini
- INQUIMAE - Departamento de Química
Inorgánica, Analítica
y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria -
Pabellón 2 - C1428EHA Buenos Aires - Argentina
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Pallarola D, Schneckenburger M, Spatz JP, Pacholski C. Real-time monitoring of electrochemical controlled protein adsorption by a plasmonic nanowire based sensor. Chem Commun (Camb) 2013; 49:8326-8. [DOI: 10.1039/c3cc44640a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Pallarola D, Bildering CV, Pietrasanta LI, Queralto N, Knoll W, Battaglini F, Azzaroni O. Recognition-driven layer-by-layer construction of multiprotein assemblies on surfaces: a biomolecular toolkit for building up chemoresponsive bioelectrochemical interfaces. Phys Chem Chem Phys 2012; 14:11027-39. [DOI: 10.1039/c2cp41225j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Cortez ML, Pallarola D, Ceolín M, Azzaroni O, Battaglini F. Ionic self-assembly of electroactive biorecognizable units: electrical contacting of redox glycoenzymes made easy. Chem Commun (Camb) 2012; 48:10868-70. [DOI: 10.1039/c2cc35949a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Battaglini F, Pallarola D. Two efficient methods for the conjugation of smooth-form lipopolysaccharides with probes bearing hydrazine or amino groups. I. LPS activation with cyanogen bromide. Methods Mol Biol 2011; 739:147-160. [PMID: 21567325 DOI: 10.1007/978-1-61779-102-4_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This chapter presents a conjugation method for coupling probes bearing hydrazine or primary amino groups to a smooth(S)-form lipopolysaccharide (LPS). LPS is modified by the activation of the hydroxyl groups present in its O-antigen moiety with cyanogen bromide in aqueous acetone. The method yields conjugates with good labeling ratios, preserving the endotoxic activity of the lipid A moiety. Conjugation of smooth-form LPS from Salmonella enterica sv. Minnesota with dansyl hydrazine and horseradish -peroxidase yields labeling ratios above 300 nmol dansyl per mg LPS, with nearly no loss of the original endotoxin activity. In the case of horseradish peroxidase, introducing a spacer, a ratio of 28 nmol HRP per mg LPS is obtained, preserving 65% of the original endotoxic activity.
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Affiliation(s)
- Fernando Battaglini
- INQUIMAE - DQIAQF, Universidad de Buenos Aires, C1428EHA, Buenos Aires, Argentina.
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Battaglini F, Pallarola D. Two efficient methods for the conjugation of smooth-form lipopolysaccharides with probes bearing hydrazine or amino groups. II. LPS activation with a cyanopyridinium agent. Methods Mol Biol 2011; 739:161-167. [PMID: 21567326 DOI: 10.1007/978-1-61779-102-4_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This chapter presents a conjugation method for coupling probes bearing hydrazine or primary amino groups to a lipopolysaccharide (LPS). LPS is modified by the activation of the hydroxyl groups present in its O-antigen moiety with 1-cyano-4-dimethylaminopyridinium tetrafluoroborate (CDAP). The method yields conjugates with good labeling ratios, preserving the endotoxic activity of the lipid A moiety. Conjugation of smooth-form LPS from Salmonella enterica sv. Minnesota with dansyl hydrazine and horseradish peroxidase yields labeling ratios above 110 nmol dansyl/mg LPS, with nearly no loss of the original endotoxic activity. In the case of horseradish peroxidase, introducing a spacer, a ratio of 29 nmol HRP/mg LPS was obtained, preserving 65% of the original endotoxic activity and an enzymatic activity of 120 U/mg.
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Affiliation(s)
- Fernando Battaglini
- INQUIMAE - DQIAQF, Universidad de Buenos Aires, C1428EHA, Buenos Aires, Argentina.
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Pallarola D, Queralto N, Knoll W, Azzaroni O, Battaglini F. Facile Glycoenzyme Wiring to Electrode Supports by Redox-Active Biosupramolecular Glue. Chemistry 2010; 16:13970-5. [DOI: 10.1002/chem.201001407] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Pallarola D, Queralto N, Knoll W, Ceolín M, Azzaroni O, Battaglini F. Redox-active concanavalin A: synthesis, characterization, and recognition-driven assembly of interfacial architectures for bioelectronic applications. Langmuir 2010; 26:13684-13696. [PMID: 20695621 DOI: 10.1021/la100486g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The convergence of chemistry, biology, and materials science has paved the way to the emergence of hybrid nanobuilding blocks that incorporate the highly selective recognition properties of biomolecules, with the tailorable functional capabilities of inorganic molecules. In this work, we describe for the first time the decoration of concanavalin A (Con A), a protein with the ability to recognize sugars and form glycoconjugates, with Os(II) redox-active complexes. This strategy enabled the construction of electroactive biosupramolecular materials whose redox potentials could be easily modulated through the facile molecular modification of the electroactive inorganic complexes. Small-angle X-ray scattering (SAXS), steady-state fluorescence, surface plasmon resonance (SPR) spectroscopy, matrix-assisted laser desorption/ionization-time-of-flight mass spectrometry (MALDI-TOF-MS), and differential-pulsed (DPV) and cyclic voltammetry (CV) were used to characterize the structural and functional features of the synthesized biohybrid building blocks as well as their respective supramolecular assemblies built up on gold electrodes. By harnessing the electroactive and carbohydrate-recognition properties of these tailor-made biohybrid building blocks, we were able to integrate glucose oxidase (GOx) onto gold electrodes via sugar-lectin interactions. The redox activity of the Os-modified Con A interlayer allowed the electronic connection between the multilayered GOx assemblies and the metal electrode as evidenced by the well-defined bioelectrocatalytic response exhibited by the biomolecular assemblies in the presence of the glucose in solution. We consider that this approach based on the spontaneous formation of redox-active biosupramolecular assemblies driven by recognition processes can be of practical relevance for the facile design of biosensors, as well as for the construction of new multifunctional bioelectrochemical systems.
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Affiliation(s)
- Diego Pallarola
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CONICET, CC 16 Suc. 4 (1900) La Plata, Argentina
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Heras JY, Pallarola D, Battaglini F. Electronic tongue for simultaneous detection of endotoxins and other contaminants of microbiological origin. Biosens Bioelectron 2010; 25:2470-6. [DOI: 10.1016/j.bios.2010.04.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2010] [Revised: 04/04/2010] [Accepted: 04/06/2010] [Indexed: 10/19/2022]
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Pallarola D, Queralto N, Battaglini F, Azzaroni O. Supramolecular assembly of glucose oxidase on concanavalin A—modified gold electrodes. Phys Chem Chem Phys 2010; 12:8071-83. [DOI: 10.1039/c000797h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Pallarola D, Battaglini F. Surfactant-Assisted Lipopolysaccharide Conjugation Employing a Cyanopyridinium Agent and Its Application to a Competitive Assay. Anal Chem 2009; 81:3824-9. [DOI: 10.1021/ac9001639] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Diego Pallarola
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, C1428EHA Buenos Aires, Argentina
| | - Fernando Battaglini
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 2, C1428EHA Buenos Aires, Argentina
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Pallarola D, Battaglini F. An efficient method for conjugation of a lipopolysaccharide from Salmonella enterica sv. Minnesota with probes bearing hydrazine or amino functional groups. Anal Biochem 2008; 381:53-8. [DOI: 10.1016/j.ab.2008.06.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Revised: 05/29/2008] [Accepted: 06/02/2008] [Indexed: 10/21/2022]
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Priano G, Pallarola D, Battaglini F. Endotoxin detection in a competitive electrochemical assay: Synthesis of a suitable endotoxin conjugate. Anal Biochem 2007; 362:108-16. [PMID: 17223065 DOI: 10.1016/j.ab.2006.12.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2006] [Revised: 12/11/2006] [Accepted: 12/15/2006] [Indexed: 11/28/2022]
Abstract
A biotin-lipopolysaccharide (biotin-LPS) conjugate was synthesized from LPS smooth from Salmonella minnesota, yielding a conjugate with a biotin/LPS ratio equal to 1:1 and endotoxic activity of 0.08 EU ng(-1). The conjugate was used in an amperometric competitive assay to determine endotoxins with endotoxin-neutralizing protein (ENP) as the recognition element. The assay is performed on a modified electrode, involving the covalent binding of carboxymethyl dextran (CMDex) to a cystamine-modified gold electrode and then the covalent binding of the recognition protein, ENP, to CMDex. The assay is carried out by incubating the modified electrode in an LPS sample to which biotin-LPS was added. Both species compete for the recognition sites on the modified surface. After the incubation stage and a careful rinsing, the electrode is immersed in a solution containing neutravidin-horseradish peroxidase conjugate (N-HRP), which binds to the sites containing biotin-LPS on the electrode. The system is rinsed and a current signal is generated by the addition of hydrogen peroxide and a redox mediator. The assay is able to detect LPS from Salmonella minnesota at concentrations as low as 0.1 ng ml(-1), equivalent to 0.07 EU ml(-1).
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Affiliation(s)
- Graciela Priano
- INQUIMAE - Departamento de Química Inorgánica, Analítica y Química Física Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
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