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Abu Shihada J, Jung M, Decke S, Koschinski L, Musall S, Rincón Montes V, Offenhäusser A. Highly Customizable 3D Microelectrode Arrays for In Vitro and In Vivo Neuronal Tissue Recordings. Adv Sci (Weinh) 2024; 11:e2305944. [PMID: 38240370 PMCID: PMC10987114 DOI: 10.1002/advs.202305944] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 12/05/2023] [Indexed: 02/16/2024]
Abstract
Planar microelectrode arrays (MEAs) for - in vitro or in vivo - neuronal signal recordings lack the spatial resolution and sufficient signal-to-noise ratio (SNR) required for a detailed understanding of neural network function and synaptic plasticity. To overcome these limitations, a highly customizable three-dimensional (3D) printing process is used in combination with thin film technology and a self-aligned template-assisted electrochemical deposition process to fabricate 3D-printed-based MEAs on stiff or flexible substrates. Devices with design flexibility and physical robustness are shown for recording neural activity in different in vitro and in vivo applications, achieving high-aspect ratio 3D microelectrodes of up to 33:1. Here, MEAs successfully record neural activity in 3D neuronal cultures, retinal explants, and the cortex of living mice, thereby demonstrating the versatility of the 3D MEA while maintaining high-quality neural recordings. Customizable 3D MEAs provide unique opportunities to study neural activity under regular or various pathological conditions, both in vitro and in vivo, and contribute to the development of drug screening and neuromodulation systems that can accurately monitor the activity of large neural networks over time.
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Affiliation(s)
- J. Abu Shihada
- Institute of Biological Information Processing (IBI‐3) – BioelectronicsForschungszentrum52428JülichGermany
- RWTH Aachen University52062AachenGermany
| | - M. Jung
- Institute of Biological Information Processing (IBI‐3) – BioelectronicsForschungszentrum52428JülichGermany
- RWTH Aachen University52062AachenGermany
| | - S. Decke
- Institute of Biological Information Processing (IBI‐3) – BioelectronicsForschungszentrum52428JülichGermany
| | - L. Koschinski
- Institute of Biological Information Processing (IBI‐3) – BioelectronicsForschungszentrum52428JülichGermany
- RWTH Aachen University52062AachenGermany
- Helmholtz Nano Facility (HNF)Forschungszentrum Jülich52428JülichGermany
| | - S. Musall
- Institute of Biological Information Processing (IBI‐3) – BioelectronicsForschungszentrum52428JülichGermany
- RWTH Aachen University52062AachenGermany
- Faculty of MedicineInstitute of Experimental Epileptology and Cognition ResearchUniversity of Bonn53127BonnGermany
- University Hospital Bonn53127BonnGermany
| | - V. Rincón Montes
- Institute of Biological Information Processing (IBI‐3) – BioelectronicsForschungszentrum52428JülichGermany
| | - A. Offenhäusser
- Institute of Biological Information Processing (IBI‐3) – BioelectronicsForschungszentrum52428JülichGermany
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2
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Wang J, Platz-Baudin E, Noetzel E, Offenhäusser A, Maybeck V. Expressing Optogenetic Actuators Fused to N-terminal Mucin Motifs Delivers Targets to Specific Subcellular Compartments in Polarized Cells. Adv Biol (Weinh) 2024; 8:e2300428. [PMID: 38015104 DOI: 10.1002/adbi.202300428] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 10/31/2023] [Indexed: 11/29/2023]
Abstract
Optogenetics is a powerful approach in neuroscience research. However, other tissues of the body may benefit from controlled ion currents and neuroscience may benefit from more precise optogenetic expression. The present work constructs three subcellularly-targeted optogenetic actuators based on the channelrhodopsin ChR2-XXL, utilizing 5, 10, or 15 tandem repeats (TR) from mucin as N-terminal targeting motifs and evaluates expression in several polarized and non-polarized cell types. The modified channelrhodopsin maintains its electrophysiological properties, which can be used to produce continuous membrane depolarization, despite the expected size of the repeats. This work then shows that these actuators are subcellularly localized in polarized cells. In polarized epithelial cells, all three actuators localize to just the lateral membrane. The TR-tagged constructs also express subcellularly in cortical neurons, where TR5-ChR2XXL and TR10-ChR2XXL mainly target the somatodendrites. Moreover, the transfection efficiencies are shown to be dependent on cell type and tandem repeat length. Overall, this work verifies that the targeting motifs from epithelial cells can be used to localize optogenetic actuators in both epithelia and neurons, opening epithelia processes to optogenetic manipulation and providing new possibilities to target optogenetic tools.
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Affiliation(s)
- Jiali Wang
- Institute of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062, Aachen, Germany
| | - Eric Platz-Baudin
- Institute of Biological Information Processing IBI-2, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
| | - Erik Noetzel
- Institute of Biological Information Processing IBI-2, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062, Aachen, Germany
| | - Vanessa Maybeck
- Institute of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
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Liang Y, Figueroa-Miranda G, Tanner JA, Huang F, Offenhäusser A, Mayer D. Highly sensitive detection of malaria biomarker through matching channel and gate capacitance of integrated organic electrochemical transistors. Biosens Bioelectron 2023; 242:115712. [PMID: 37816283 DOI: 10.1016/j.bios.2023.115712] [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] [Received: 07/04/2023] [Revised: 08/18/2023] [Accepted: 09/25/2023] [Indexed: 10/12/2023]
Abstract
Organic electrochemical transistors (OECTs) possess versatile advantages for biochemical and electrophysiological applications due to electrochemical gating and ion-to-electron conversion capability. Although OECTs have been successfully applied for biochemical sensing, the effect of relative capacitance for specific sensing events is still unclear. In the present work, we design integrated interdigitated OECTs (iOECTs) with on-plane gold gate and different channel geometries for point-of-care diagnosis of malaria using aptamer as receptor. The transconductance of the iOECTs gated with micro-size gold electrodes decreased with increasing the channel thicknesses, especially for devices with large channel areas, which is inconsistent with devices gated by typical Ag/AgCl electrodes, attributing to the limited gating efficiency of the micro-size gate electrode. The capacitance of gate electrode was heavily suppressed by receptors but increased with the incubation of targets. In addition, the integrated iOECTs with thin channels exhibited superior sensitivity for malaria detection with the detection limit as low as 3.2 aM, much lower than their thick channel counterpart and other state-of-the-art biosensors. These deviations could be caused by the high relative capacitances, with respect to the gate and channel capacitance (Cg/Cch), resulting in a high gate potential drop over the organic channel and thus entirely gating on the thin channel device. These findings provide guidance to optimize the geometry of OECT devices with on-chip integrated gates and the fabrication of miniaturized OECTs for biosensing applications.
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Affiliation(s)
- Yuanying Liang
- Guangdong Artificial Intelligence and Digital Economy Laboratory (Guangzhou), Guangzhou, 510335, Guangdong, China; Institute of Biological Information Processing, Bioelecronics IBI-3, Forschungszentrum Jülich, 52425, Jülich, Germany.
| | - Gabriela Figueroa-Miranda
- Institute of Biological Information Processing, Bioelecronics IBI-3, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Julian Alexander Tanner
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, China
| | - Fei Huang
- Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, Guangdong, China
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, Bioelecronics IBI-3, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelecronics IBI-3, Forschungszentrum Jülich, 52425, Jülich, Germany
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Abuawad A, Ashhab Y, Offenhäusser A, Krause HJ. DNA Sensor for the Detection of Brucella spp. Based on Magnetic Nanoparticle Markers. Int J Mol Sci 2023; 24:17272. [PMID: 38139102 PMCID: PMC10744106 DOI: 10.3390/ijms242417272] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/04/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Due to the limitations of conventional Brucella detection methods, including safety concerns, long incubation times, and limited specificity, the development of a rapid, selective, and accurate technique for the early detection of Brucella in livestock animals is crucial to prevent the spread of the associated disease. In the present study, we introduce a magnetic nanoparticle marker-based biosensor using frequency mixing magnetic detection for point-of-care testing and quantification of Brucella DNA. Superparamagnetic nanoparticles were used as magnetically measured markers to selectively detect the target DNA hybridized with its complementary capture probes immobilized on a porous polyethylene filter. Experimental conditions like density and length of the probes, hybridization time and temperature, and magnetic binding specificity, sensitivity, and detection limit were investigated and optimized. Our sensor demonstrated a relatively fast detection time of approximately 10 min, with a detection limit of 55 copies (0.09 fM) when tested using DNA amplified from Brucella genetic material. In addition, the detection specificity was examined using gDNA from Brucella and other zoonotic bacteria that may coexist in the same niche, confirming the method's selectivity for Brucella DNA. Our proposed biosensor has the potential to be used for the early detection of Brucella bacteria in the field and can contribute to disease control measures.
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Affiliation(s)
- Abdalhalim Abuawad
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich, 52428 Jülich, Germany; (A.A.)
- Faculty of Mathematics, Computer Science and Natural Sciences, Rheinisch-Westfälische Technische Hochschule Aachen University, 52062 Aachen, Germany
| | - Yaqoub Ashhab
- Palestine–Korea Biotechnology Center, Palestine Polytechnic University, Hebron P720, Palestine
| | - Andreas Offenhäusser
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich, 52428 Jülich, Germany; (A.A.)
- Faculty of Mathematics, Computer Science and Natural Sciences, Rheinisch-Westfälische Technische Hochschule Aachen University, 52062 Aachen, Germany
| | - Hans-Joachim Krause
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich, 52428 Jülich, Germany; (A.A.)
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Cepkenovic B, Friedland F, Noetzel E, Maybeck V, Offenhäusser A. Single-neuron mechanical perturbation evokes calcium plateaus that excite and modulate the network. Sci Rep 2023; 13:20669. [PMID: 38001109 PMCID: PMC10673841 DOI: 10.1038/s41598-023-47090-z] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
Mechanical stimulation is a promising means to non-invasively excite and modulate neuronal networks with a high spatial resolution. Despite the thorough characterization of the initiation mechanism, whether or how mechanical responses disperse into non-target areas remains to be discovered. Our in vitro study demonstrates that a single-neuron deformation evokes responses that propagate to about a third of the untouched neighbors. The responses develop via calcium influx through mechanosensitive channels and regeneratively propagate through the neuronal ensemble via gap junctions. Although independent of action potentials and synapses, mechanical responses reliably evoke membrane depolarizations capable of inducing action potentials both in the target and neighbors. Finally, we show that mechanical stimulation transiently potentiates the responding assembly for further inputs, as both gain and excitability are transiently increased exclusively in neurons that respond to a neighbor's mechanical stimulation. The findings indicate a biological component affecting the spatial resolution of mechanostimulation and point to a cross-talk in broad-network mechanical stimulations. Since giga-seal formation in patch-clamp produces a similar mechanical stimulus on the neuron, our findings inform which neuroscientific questions could be reliably tackled with patch-clamp and what recovery post-gigaseal formation is necessary.
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Affiliation(s)
- Bogdana Cepkenovic
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
- RWTH Aachen University, Templergraben 55, 52062, Aachen, Germany
| | - Florian Friedland
- Institute of Biological Information Processing: Mechanobiology (IBI-2), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
| | - Erik Noetzel
- Institute of Biological Information Processing: Mechanobiology (IBI-2), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
| | - Vanessa Maybeck
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany.
| | - Andreas Offenhäusser
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
- RWTH Aachen University, Templergraben 55, 52062, Aachen, Germany
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Koschinski L, Lenyk B, Jung M, Lenzi I, Kampa B, Mayer D, Offenhäusser A, Musall S, Rincón Montes V. Validation of transparent and flexible neural implants for simultaneous electrophysiology, functional imaging, and optogenetics. J Mater Chem B 2023; 11:9639-9657. [PMID: 37610228 DOI: 10.1039/d3tb01191g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 08/24/2023]
Abstract
The combination of electrophysiology and neuroimaging methods allows the simultaneous measurement of electrical activity signals with calcium dynamics from single neurons to neuronal networks across distinct brain regions in vivo. While traditional electrophysiological techniques are limited by photo-induced artefacts and optical occlusion for neuroimaging, different types of transparent neural implants have been proposed to resolve these issues. However, reproducing proposed solutions is often challenging and it remains unclear which approach offers the best properties for long-term chronic multimodal recordings. We therefore created a streamlined fabrication process to produce, and directly compare, two types of transparent surface micro-electrocorticography (μECoG) implants: nano-mesh gold structures (m-μECoGs) versus a combination of solid gold interconnects and PEDOT:PSS-based electrodes (pp-μECoGs). Both implants allowed simultaneous multimodal recordings but pp-μECoGs offered the best overall electrical, electrochemical, and optical properties with negligible photo-induced artefacts to light wavelengths of interest. Showing functional chronic stability for up to four months, pp-μECoGs also allowed the simultaneous functional mapping of electrical and calcium neural signals upon visual and tactile stimuli during widefield imaging. Moreover, recordings during two-photon imaging showed no visible signal attenuation and enabled the correlation of network dynamics across brain regions to individual neurons located directly below the transparent electrical contacts.
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Affiliation(s)
- Lina Koschinski
- Institute of Biological Information Processing (IBI-3) - Bioelectronics, Forschungszentrum, Jülich, Germany.
- Helmholtz Nano Facility (HNF), Forschungszentrum, Jülich, Germany
- RWTH Aachen University, Germany
| | - Bohdan Lenyk
- Institute of Biological Information Processing (IBI-3) - Bioelectronics, Forschungszentrum, Jülich, Germany.
| | - Marie Jung
- Institute of Biological Information Processing (IBI-3) - Bioelectronics, Forschungszentrum, Jülich, Germany.
- RWTH Aachen University, Germany
| | - Irene Lenzi
- Institute of Biological Information Processing (IBI-3) - Bioelectronics, Forschungszentrum, Jülich, Germany.
- RWTH Aachen University, Germany
| | - Björn Kampa
- RWTH Aachen University, Germany
- JARA BRAIN Institute of Neuroscience and Medicine (INM-10), Forschungszentrum, Jülich, Germany
| | - Dirk Mayer
- Institute of Biological Information Processing (IBI-3) - Bioelectronics, Forschungszentrum, Jülich, Germany.
| | - Andreas Offenhäusser
- Institute of Biological Information Processing (IBI-3) - Bioelectronics, Forschungszentrum, Jülich, Germany.
| | - Simon Musall
- Institute of Biological Information Processing (IBI-3) - Bioelectronics, Forschungszentrum, Jülich, Germany.
- RWTH Aachen University, Germany
- University of Bonn, Faculty of Medicine, Institute of Experimental Epileptology and Cognition Research, Germany
- University Hospital Bonn, Germany
| | - Viviana Rincón Montes
- Institute of Biological Information Processing (IBI-3) - Bioelectronics, Forschungszentrum, Jülich, Germany.
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Hu Z, Zhu R, Figueroa-Miranda G, Zhou L, Feng L, Offenhäusser A, Mayer D. Truncated Electrochemical Aptasensor with Enhanced Antifouling Capability for Highly Sensitive Serotonin Detection. Biosensors (Basel) 2023; 13:881. [PMID: 37754115 PMCID: PMC10527390 DOI: 10.3390/bios13090881] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/06/2023] [Accepted: 09/08/2023] [Indexed: 09/28/2023]
Abstract
Accurate determination of serotonin (ST) provides insight into neurological processes and enables applications in clinical diagnostics of brain diseases. Herein, we present an electrochemical aptasensor based on truncated DNA aptamers and a polyethylene glycol (PEG) molecule-functionalized sensing interface for highly sensitive and selective ST detection. The truncated aptamers have a small size and adopt a stable stem-loop configuration, which improves the accessibility of the aptamer for the analyte and enhances the sensitivity of the aptasensor. Upon target binding, these aptamers perform a conformational change, leading to a variation in the Faraday current of the redox tag, which was recorded by square wave voltammetry (SWV). Using PEG as blocking molecules minimizes nonspecific adsorption of other interfering molecules and thus endows an enhanced antifouling ability. The proposed electrochemical aptamer sensor showed a wide range of detection lasting from 0.1 nM to 1000 nM with a low limit of detection of 0.14 nM. Owing to the unique properties of aptamer receptors, the aptasensor also exhibits high selectivity and stability. Furthermore, with the reduced unspecific adsorption, assaying of ST in human serum and artificial cerebrospinal fluid (aCSF) showed excellent performance. The reported strategy of utilizing antifouling PEG describes a novel approach to building antifouling aptasensors and holds great potential for neurochemical investigations and clinical diagnosis.
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Affiliation(s)
- Ziheng Hu
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany; (Z.H.); (R.Z.); (G.F.-M.); (L.Z.); (A.O.)
- Faculty I, RWTH Aachen University, 52062 Aachen, Germany
| | - Ruifeng Zhu
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany; (Z.H.); (R.Z.); (G.F.-M.); (L.Z.); (A.O.)
| | - Gabriela Figueroa-Miranda
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany; (Z.H.); (R.Z.); (G.F.-M.); (L.Z.); (A.O.)
| | - Lei Zhou
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany; (Z.H.); (R.Z.); (G.F.-M.); (L.Z.); (A.O.)
| | - Lingyan Feng
- Department of Materials Genome Institute, and Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China;
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany; (Z.H.); (R.Z.); (G.F.-M.); (L.Z.); (A.O.)
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany; (Z.H.); (R.Z.); (G.F.-M.); (L.Z.); (A.O.)
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Zhu R, Figueroa-Miranda G, Zhou L, Hu Z, Lenyk B, Ingebrandt S, Offenhäusser A, Mayer D. A Combined Plasmonic and Electrochemical Aptasensor Based on Gold Nanopit Arrays for the Detection of Human Serum Albumin. Nanomaterials (Basel) 2023; 13:2374. [PMID: 37630959 PMCID: PMC10458775 DOI: 10.3390/nano13162374] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 08/04/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023]
Abstract
Electrochemical and optical platforms are commonly employed in designing biosensors. However, one signal readout can easily lead to inaccuracies due to the effect of nonstandard test procedures, different operators, and experimental environments. We have developed a dual-signal protocol that combined two transducer principles in one aptamer-based biosensor by simultaneously performing electrochemical- and extraordinary optical transmission (EOT)-based plasmonic detection using gold nanopit arrays (AuNpA). Compared with full hole structures, we found that nanopits, that did not fully penetrate the gold film, not only exhibited a better plasmonic bandwidth and refractive index sensitivity both in the finite-difference time-domain simulation and in experiments by shielding the gold/quartz mode but also enlarged the electrochemical active surface area. Therefore, the periodic non-fully penetrating AuNpA were modified with ferrocene-labeled human serum albumin aptamer receptors. The formation of the receptor layer and human serum albumin binding complex induced a conformational change, which resulted in variation in the electron transfer between the electro-active ferrocene units and the AuNpA surface. Simultaneously, the binding event caused a surface plasmon polaritons wavelength shift corresponding to a change in the surface refractive index. Interestingly, although both transducers recorded the same binding process, they led to different limits of detection, dynamic ranges, and sensitivities. The electrochemical transducer showed a dynamic detection range from 1 nM to 600 μM, while the optical transducer covered high concentrations from 100 μM to 600 μM. This study not only provides new insights into the design of plasmonic nanostructures but also potentially opens an exciting avenue for dual-signal disease diagnosis and point-of-care testing applications.
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Affiliation(s)
- Ruifeng Zhu
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- Institute of Materials in Electrical Engineering 1, RWTH Aachen University, 52074 Aachen, Germany
| | - Gabriela Figueroa-Miranda
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Lei Zhou
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Ziheng Hu
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Bohdan Lenyk
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - Sven Ingebrandt
- Institute of Materials in Electrical Engineering 1, RWTH Aachen University, 52074 Aachen, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
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Forró C, Musall S, Montes VR, Linkhorst J, Walter P, Wessling M, Offenhäusser A, Ingebrandt S, Weber Y, Lampert A, Santoro F. Toward the Next Generation of Neural Iontronic Interfaces. Adv Healthc Mater 2023; 12:e2301055. [PMID: 37434349 DOI: 10.1002/adhm.202301055] [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] [Received: 04/03/2023] [Revised: 05/23/2023] [Indexed: 07/13/2023]
Abstract
Neural interfaces are evolving at a rapid pace owing to advances in material science and fabrication, reduced cost of scalable complementary metal oxide semiconductor (CMOS) technologies, and highly interdisciplinary teams of researchers and engineers that span a large range from basic to applied and clinical sciences. This study outlines currently established technologies, defined as instruments and biological study systems that are routinely used in neuroscientific research. After identifying the shortcomings of current technologies, such as a lack of biocompatibility, topological optimization, low bandwidth, and lack of transparency, it maps out promising directions along which progress should be made to achieve the next generation of symbiotic and intelligent neural interfaces. Lastly, it proposes novel applications that can be achieved by these developments, ranging from the understanding and reproduction of synaptic learning to live-long multimodal measurements to monitor and treat various neuronal disorders.
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Affiliation(s)
- Csaba Forró
- Institute for Biological Information Processing - Bioelectronics IBI-3, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
- Institute of Materials in Electrical Engineering 1, RWTH Aachen, Sommerfeldstr. 24, 52074, Aachen, Germany
| | - Simon Musall
- Institute for Biological Information Processing - Bioelectronics IBI-3, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
- Institute for Zoology, RWTH Aachen University, Worringerweg 3, 52074, Aachen, Germany
| | - Viviana Rincón Montes
- Institute for Biological Information Processing - Bioelectronics IBI-3, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
| | - John Linkhorst
- Chemical Process Engineering, RWTH Aachen, Forckenbeckstr. 51, 52074, Aachen, Germany
| | - Peter Walter
- Department of Ophthalmology, University Hospital RWTH Aachen, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Matthias Wessling
- Chemical Process Engineering, RWTH Aachen, Forckenbeckstr. 51, 52074, Aachen, Germany
- DWI Leibniz Institute for Interactive Materials, RWTH Aachen, Forckenbeckstr. 50, 52074, Aachen, Germany
| | - Andreas Offenhäusser
- Institute for Biological Information Processing - Bioelectronics IBI-3, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
| | - Sven Ingebrandt
- Institute of Materials in Electrical Engineering 1, RWTH Aachen, Sommerfeldstr. 24, 52074, Aachen, Germany
| | - Yvonne Weber
- Department of Epileptology, Neurology, RWTH Aachen, Pauwelsstr. 30, 52074, Aachen, Germany
| | - Angelika Lampert
- Institute of Neurophysiology, Uniklinik RWTH Aachen, Pauwelsstrasse 30, 52074, Aachen, Germany
| | - Francesca Santoro
- Institute for Biological Information Processing - Bioelectronics IBI-3, Wilhelm-Johnen-Straße, 52428, Jülich, Germany
- Institute of Materials in Electrical Engineering 1, RWTH Aachen, Sommerfeldstr. 24, 52074, Aachen, Germany
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10
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Maassen J, Guenther R, Hondrich TJJ, Cepkenovic B, Brinkmann D, Maybeck V, Offenhäusser A, Dittrich B, Müller A, Skazik-Voogt C, Kosel M, Baum C, Gutermuth A. In Vitro Simulated Neuronal Environmental Conditions Qualify Umbilical Cord Derived Highly Potent Stem Cells for Neuronal Differentiation. Stem Cell Rev Rep 2023:10.1007/s12015-023-10538-w. [PMID: 37093520 PMCID: PMC10390376 DOI: 10.1007/s12015-023-10538-w] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2023] [Indexed: 04/25/2023]
Abstract
The healing of neuronal injuries is still an unachieved goal. Medicine-based therapies can only extend the survival of patients, but not finally lead to a healing process. Currently, a variety of stem cell-based tissue engineering developments are the subject of many research projects to bridge this gap. As yet, neuronal differentiation of induced pluripotent stem cells (iPS), embryonic cell lines, or neuronal stem cells could be accomplished and produce functional neuronally differentiated cells. However, clinical application of cells from these sources is hampered by ethical considerations. To overcome these hurdles numerous studies investigated the potential of adult mesenchymal stem cells (MSCs) as a potential stem cell source. Adult MSCs have been approved as cellular therapeutical products due to their regenerative potential and immunomodulatory properties. Only a few of these studies could demonstrate the capacity to differentiate MSCs into active firing neuron like cells. With this study we investigated the potential of Wharton's Jelly (WJ) derived stem cells and focused on the intrinsic pluripotent stem cell pool and their potential to differentiate into active neurons. With a comprehensive neuronal differentiation protocol comprised of mechanical and biochemical inductive cues, we investigated the capacity of spontaneously forming stem cell spheroids (SCS) from cultured WJ stromal cells in regard to their neuronal differentiation potential and compared them to undifferentiated spheroids or adherent MSCs. Spontaneously formed SCSs show pluripotent and neuroectodermal lineage markers, meeting the pre-condition for neuronal differentiation and contain a higher amount of cells which can be differentiated into cells whose functional phenotypes in calcium and voltage responsive electrical activity are similar to neurons. In conclusion we show that up-concentration of stem cells from WJ with pluripotent characteristics is a tool to generate neuronal cell replacement.
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Affiliation(s)
- Jessika Maassen
- Department for Applied Cell Biology, Fraunhofer Institute for Production Technology, Steinbachstr. 17, 52074, Aachen, Germany
| | - Rebecca Guenther
- Department for Applied Cell Biology, Fraunhofer Institute for Production Technology, Steinbachstr. 17, 52074, Aachen, Germany
| | - Timm J J Hondrich
- Institute for Biological Information Processing, IBI-3, Forschungszentrum Jülich GmbH, Leo Brandtstrasse Station 71, 52425, Jülich, Germany
| | - Bogdana Cepkenovic
- Institute for Biological Information Processing, IBI-3, Forschungszentrum Jülich GmbH, Leo Brandtstrasse Station 71, 52425, Jülich, Germany
- Department of Biology, RWTH Aachen University, Worringerweg 1, 52074, Aachen, Germany
| | - Dominik Brinkmann
- Institute for Biological Information Processing, IBI-3, Forschungszentrum Jülich GmbH, Leo Brandtstrasse Station 71, 52425, Jülich, Germany
| | - Vanessa Maybeck
- Institute for Biological Information Processing, IBI-3, Forschungszentrum Jülich GmbH, Leo Brandtstrasse Station 71, 52425, Jülich, Germany
| | - Andreas Offenhäusser
- Institute for Biological Information Processing, IBI-3, Forschungszentrum Jülich GmbH, Leo Brandtstrasse Station 71, 52425, Jülich, Germany
| | - Barbara Dittrich
- DWI-Leibniz Institute for Interactive Materials, Forckenbeckstrasse 50, 52074, Aachen, Germany
| | - Anna Müller
- Department for Applied Cell Biology, Fraunhofer Institute for Production Technology, Steinbachstr. 17, 52074, Aachen, Germany
| | - Claudia Skazik-Voogt
- Department for Applied Cell Biology, Fraunhofer Institute for Production Technology, Steinbachstr. 17, 52074, Aachen, Germany
| | - Maximilian Kosel
- Department for Applied Cell Biology, Fraunhofer Institute for Production Technology, Steinbachstr. 17, 52074, Aachen, Germany
| | - Christoph Baum
- Department for Applied Cell Biology, Fraunhofer Institute for Production Technology, Steinbachstr. 17, 52074, Aachen, Germany
| | - Angela Gutermuth
- Department for Applied Cell Biology, Fraunhofer Institute for Production Technology, Steinbachstr. 17, 52074, Aachen, Germany.
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11
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Hu Z, Li Y, Figueroa-Miranda G, Musal S, Li H, Martínez-Roque MA, Hu Q, Feng L, Mayer D, Offenhäusser A. Aptamer based biosensor platforms for neurotransmitters analysis. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.117021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
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12
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Domínguez-Aragón A, Zaragoza-Contreras EA, Figueroa-Miranda G, Offenhäusser A, Mayer D. Electrochemical Immunosensor Using Electroactive Carbon Nanohorns for Signal Amplification for the Rapid Detection of Carcinoembryonic Antigen. Biosensors (Basel) 2022; 13:bios13010063. [PMID: 36671898 PMCID: PMC9855668 DOI: 10.3390/bios13010063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/15/2022] [Accepted: 12/22/2022] [Indexed: 05/31/2023]
Abstract
In this work, a novel sandwich-type electrochemical immunosensor was developed for the quantitative detection of the carcinoembryonic antigen, an important tumor marker in clinical tests. The capture antibodies were immobilized on the surface of a gold disk electrode, while detection antibodies were attached to redox-tagged single-walled carbon nanohorns/thionine/AuNPs. Both types of antibody immobilization were carried out through Au-S bonds using the novel photochemical immobilization technique that ensures control over the orientation of the antibodies. The electroactive SWCNH/Thi/AuNPs nanocomposite worked as a signal tag to carry out both the detection of carcinoembryonic antigen and the amplification of the detection signal. The current response was monitored by differential pulse voltammetry. A clear dependence of the thionine redox peak was observed as a function of the carcinoembryonic antigen concentration. A linear detection range from 0.001-200 ng/mL and a low detection limit of 0.1385 pg/mL were obtained for this immunoassay. The results showed that carbon nanohorns represent a promising matrix for signal amplification in sandwich-type electrochemical immune assays working as a conductive and binding matrix with easy and versatile modification routes to antibody and redox tag immobilization, which possesses great potential for clinical diagnostics of CEA and other biomarkers.
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Affiliation(s)
- Angélica Domínguez-Aragón
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
- Centro de Investigación en Materiales Avanzados, S.C. Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua 31136, Mexico
| | - Erasto Armando Zaragoza-Contreras
- Centro de Investigación en Materiales Avanzados, S.C. Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua 31136, Mexico
| | - Gabriela Figueroa-Miranda
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
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13
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Pourshahidi AM, Achtsnicht S, Offenhäusser A, Krause HJ. Frequency Mixing Magnetic Detection Setup Employing Permanent Ring Magnets as a Static Offset Field Source. Sensors (Basel) 2022; 22:8776. [PMID: 36433383 PMCID: PMC9694433 DOI: 10.3390/s22228776] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/07/2022] [Accepted: 11/10/2022] [Indexed: 06/16/2023]
Abstract
Frequency mixing magnetic detection (FMMD) has been explored for its applications in fields of magnetic biosensing, multiplex detection of magnetic nanoparticles (MNP) and the determination of core size distribution of MNP samples. Such applications rely on the application of a static offset magnetic field, which is generated traditionally with an electromagnet. Such a setup requires a current source, as well as passive or active cooling strategies, which directly sets a limitation based on the portability aspect that is desired for point of care (POC) monitoring applications. In this work, a measurement head is introduced that involves the utilization of two ring-shaped permanent magnets to generate a static offset magnetic field. A steel cylinder in the ring bores homogenizes the field. By variation of the distance between the ring magnets and of the thickness of the steel cylinder, the magnitude of the magnetic field at the sample position can be adjusted. Furthermore, the measurement setup is compared to the electromagnet offset module based on measured signals and temperature behavior.
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Affiliation(s)
- Ali Mohammad Pourshahidi
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062 Aachen, Germany
| | - Stefan Achtsnicht
- Institute of Nano-and Biotechnologies (INB), FH Aachen University of Applied Sciences, 52428 Jülich, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062 Aachen, Germany
| | - Hans-Joachim Krause
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
- Institute of Nano-and Biotechnologies (INB), FH Aachen University of Applied Sciences, 52428 Jülich, Germany
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14
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Zhang Y, Kudriashov D, Pershina L, Offenhäusser A, Mourzina Y. Intrinsic Multienzyme-like Activities of the Nanoparticles of Mn and Fe Cyano-Bridged Assemblies. Nanomaterials (Basel) 2022; 12:2095. [PMID: 35745431 PMCID: PMC9227851 DOI: 10.3390/nano12122095] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 02/06/2023]
Abstract
This study investigates the intrinsic multienzyme-like properties of the non-stabilized nanocrystalline nanoparticles of manganese-doped Prussian blue (Mn-PB) nanozymes and Prussian blue (PB) nanozymes in chemical and electrocatalytic transformations of reactive oxygen species. The effect of manganese doping on the structural, biomimetic, and electrocatalytic properties of cyano-bridged assemblies is also discussed.
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Affiliation(s)
| | | | | | | | - Yulia Mourzina
- Institute of Biological Information Processing (IBI-3-Bioelectronics), Forschungszentrum Jülich, 52425 Jülich, Germany; (Y.Z.); (D.K.); (L.P.); (A.O.)
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15
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Kempmann A, Gensch T, Offenhäusser A, Tihaa I, Maybeck V, Balfanz S, Baumann A. The Functional Characterization of GCaMP3.0 Variants Specifically Targeted to Subcellular Domains. Int J Mol Sci 2022; 23:ijms23126593. [PMID: 35743038 PMCID: PMC9223625 DOI: 10.3390/ijms23126593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 05/31/2022] [Accepted: 06/06/2022] [Indexed: 11/16/2022] Open
Abstract
Calcium (Ca2+) ions play a pivotal role in physiology and cellular signaling. The intracellular Ca2+ concentration ([Ca2+]i) is about three orders of magnitude lower than the extracellular concentration, resulting in a steep transmembrane concentration gradient. Thus, the spatial and the temporal dynamics of [Ca2+]i are ideally suited to modulate Ca2+-mediated cellular responses to external signals. A variety of highly sophisticated methods have been developed to gain insight into cellular Ca2+ dynamics. In addition to electrophysiological measurements and the application of synthetic dyes that change their fluorescent properties upon interaction with Ca2+, the introduction and the ongoing development of genetically encoded Ca2+ indicators (GECI) opened a new era to study Ca2+-driven processes in living cells and organisms. Here, we have focused on one well-established GECI, i.e., GCaMP3.0. We have systematically modified the protein with sequence motifs, allowing localization of the sensor in the nucleus, in the mitochondrial matrix, at the mitochondrial outer membrane, and at the plasma membrane. The individual variants and a cytosolic version of GCaMP3.0 were overexpressed and purified from E. coli cells to study their biophysical properties in solution. All versions were examined to monitor Ca2+ signaling in stably transfected cell lines and in primary cortical neurons transduced with recombinant Adeno-associated viruses (rAAV). In this comparative study, we provide evidence for a robust approach to reliably trace Ca2+ signals at the (sub)-cellular level with pronounced temporal resolution.
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Affiliation(s)
- Annika Kempmann
- Institute of Biological Information Processing, IBI-1, Research Center Jülich, 52428 Jülich, Germany; (A.K.); (T.G.); (S.B.)
| | - Thomas Gensch
- Institute of Biological Information Processing, IBI-1, Research Center Jülich, 52428 Jülich, Germany; (A.K.); (T.G.); (S.B.)
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, IBI-3, Research Center Jülich, 52428 Jülich, Germany; (A.O.); (I.T.); (V.M.)
| | - Irina Tihaa
- Institute of Biological Information Processing, IBI-3, Research Center Jülich, 52428 Jülich, Germany; (A.O.); (I.T.); (V.M.)
| | - Vanessa Maybeck
- Institute of Biological Information Processing, IBI-3, Research Center Jülich, 52428 Jülich, Germany; (A.O.); (I.T.); (V.M.)
| | - Sabine Balfanz
- Institute of Biological Information Processing, IBI-1, Research Center Jülich, 52428 Jülich, Germany; (A.K.); (T.G.); (S.B.)
| | - Arnd Baumann
- Institute of Biological Information Processing, IBI-1, Research Center Jülich, 52428 Jülich, Germany; (A.K.); (T.G.); (S.B.)
- Correspondence: ; Tel.: +49-2461-614014
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16
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Shokoohimehr P, Cepkenovic B, Milos F, Bednár J, Hassani H, Maybeck V, Offenhäusser A. High-Aspect-Ratio Nanoelectrodes Enable Long-Term Recordings of Neuronal Signals with Subthreshold Resolution. Small 2022; 18:e2200053. [PMID: 35527345 DOI: 10.1002/smll.202200053] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 04/24/2022] [Indexed: 06/14/2023]
Abstract
The further development of neurochips requires high-density and high-resolution recordings that also allow neuronal signals to be observed over a long period of time. Expanding fields of network neuroscience and neuromorphic engineering demand the multiparallel and direct estimations of synaptic weights, and the key objective is to construct a device that also records subthreshold events. Recently, 3D nanostructures with a high aspect ratio have become a particularly suitable interface between neurons and electronic devices, since the excellent mechanical coupling to the neuronal cell membrane allows very high signal-to-noise ratio recordings. In the light of an increasing demand for a stable, noninvasive and long-term recording at subthreshold resolution, a combination of vertical nanostraws with nanocavities is presented. These structures provide a spontaneous tight coupling with rat cortical neurons, resulting in high amplitude sensitivity and postsynaptic resolution capability, as directly confirmed by combined patch-clamp and microelectrode array measurements.
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Affiliation(s)
- Pegah Shokoohimehr
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
- Faculty 1, RWTH Aachen University, Templergraben 55, 52062, Aachen, Germany
| | - Bogdana Cepkenovic
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
- Faculty 1, RWTH Aachen University, Templergraben 55, 52062, Aachen, Germany
| | - Frano Milos
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
- Faculty 1, RWTH Aachen University, Templergraben 55, 52062, Aachen, Germany
| | - Justus Bednár
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
- Faculty 1, RWTH Aachen University, Templergraben 55, 52062, Aachen, Germany
| | - Hossein Hassani
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
- Faculty 1, RWTH Aachen University, Templergraben 55, 52062, Aachen, Germany
| | - Vanessa Maybeck
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing: Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Straße 1, 52428, Jülich, Germany
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17
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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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18
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Wu C, Barkova D, Komarova N, Offenhäusser A, Andrianova M, Hu Z, Kuznetsov A, Mayer D. Highly selective and sensitive detection of glutamate by an electrochemical aptasensor. Anal Bioanal Chem 2021; 414:1609-1622. [PMID: 34783880 DOI: 10.1007/s00216-021-03783-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/21/2021] [Accepted: 11/09/2021] [Indexed: 01/03/2023]
Abstract
An electrochemical aptamer-based sensor was developed for glutamate, the major excitatory neurotransmitter in the central nervous system. Determining glutamic acid release and glutamic acid levels is crucial for studying signal transmission and for diagnosing pathological conditions in the brain. Glutamic acid-selective oligonucleotides were isolated from an ssDNA library using the Capture-SELEX protocol in complex medium. The selection permitted the isolation of an aptamer 1d04 with a dissociation constant of 12 µM. The aptamer sequence was further used in the development of an electrochemical aptamer sensor. For this purpose, a truncated aptamer sequence named glu1 was labelled with a ferrocene redox tag at the 3'-end and immobilized on a gold electrode surface via Au-thiol bonds. Using 6-mercapto-1-hexanol as the backfill, the sensor performance was characterized by alternating current voltammetry. The glu1 aptasensor showed a limit of detection of 0.0013 pM, a wide detection range between 0.01 pM and 1 nM, and good selectivity for glutamate in tenfold diluted human serum. With this enzyme-free aptasensor, the highly selective and sensitive detection of glutamate was demonstrated, which possesses great potential for implementation in microelectrodes and for in vitro as well as in vivo monitoring of neurotransmitter release.
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Affiliation(s)
- Changtong Wu
- Institute of Biological Information Processing, (IBI-3), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany.,Faculty I, RWTH Aachen University, 52062, Aachen, Germany
| | - Daria Barkova
- Scientific-Manufacturing Complex Technological Centre, 1-7 Shokin Square, Zelenograd, Moscow, 124498, Russia
| | - Natalia Komarova
- Scientific-Manufacturing Complex Technological Centre, 1-7 Shokin Square, Zelenograd, Moscow, 124498, Russia
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, (IBI-3), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany.,Faculty I, RWTH Aachen University, 52062, Aachen, Germany
| | - Mariia Andrianova
- Scientific-Manufacturing Complex Technological Centre, 1-7 Shokin Square, Zelenograd, Moscow, 124498, Russia
| | - Ziheng Hu
- Institute of Biological Information Processing, (IBI-3), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany
| | - Alexander Kuznetsov
- Scientific-Manufacturing Complex Technological Centre, 1-7 Shokin Square, Zelenograd, Moscow, 124498, Russia.
| | - Dirk Mayer
- Institute of Biological Information Processing, (IBI-3), Forschungszentrum Jülich GmbH, 52425, Jülich, Germany.
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19
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Srikantharajah K, Medinaceli Quintela R, Doerenkamp K, Kampa BM, Musall S, Rothermel M, Offenhäusser A. Minimally-invasive insertion strategy and in vivo evaluation of multi-shank flexible intracortical probes. Sci Rep 2021; 11:18920. [PMID: 34556704 PMCID: PMC8460634 DOI: 10.1038/s41598-021-97940-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 08/26/2021] [Indexed: 11/16/2022] Open
Abstract
Chronically implanted neural probes are powerful tools to decode brain activity however, recording population and spiking activity over long periods remains a major challenge. Here, we designed and fabricated flexible intracortical Michigan-style arrays with a shank cross-section per electrode of 250 μm[Formula: see text] utilizing the polymer paryleneC with the goal to improve the immune acceptance. As flexible neural probes are unable to penetrate the brain due to the low buckling force threshold, a tissue-friendly insertion system was developed by reducing the effective shank length. The insertion strategy enabled the implantation of the four, bare, flexible shanks up to 2 mm into the mouse brain without increasing the implantation footprint and therefore, minimizing the acute trauma. In acute recordings from the mouse somatosensory cortex and the olfactory bulb, we demonstrated that the flexible probes were able to simultaneously detect local field potentials as well as single and multi-unit activity. Additionally, the flexible arrays outperformed stiff probes with respect to yield of single unit activity. Following the successful in vivo validation, we further improved the microfabrication towards a double-metal-layer process, and were able to double the number of electrodes per shank by keeping the shank width resulting in a cross-section per electrode of 118 μm[Formula: see text].
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Affiliation(s)
- Kagithiri Srikantharajah
- Bioelectronics, Institute of Biological Information Processing-3, Forschungszentrum Jülich, Jülich, Germany
- RWTH Aachen University, Aachen, Germany
| | - Renata Medinaceli Quintela
- Institute for Physiology and Cell Biology, University of Veterinary Medicine, Foundation, Hannover, Germany
| | - Kerstin Doerenkamp
- Department of Neurophysiology, Institute for Biology II, RWTH Aachen University, Aachen, Germany
| | - Björn M Kampa
- Department of Neurophysiology, Institute for Biology II, RWTH Aachen University, Aachen, Germany
- JARA BRAIN, Institute for Neuroscience and Medicine, Forschungszentrum Jülich, Jülich, Germany
| | - Simon Musall
- Bioelectronics, Institute of Biological Information Processing-3, Forschungszentrum Jülich, Jülich, Germany
| | - Markus Rothermel
- Institute for Physiology and Cell Biology, University of Veterinary Medicine, Foundation, Hannover, Germany
| | - Andreas Offenhäusser
- Bioelectronics, Institute of Biological Information Processing-3, Forschungszentrum Jülich, Jülich, Germany.
- RWTH Aachen University, Aachen, Germany.
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20
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Pourshahidi AM, Achtsnicht S, Nambipareechee MM, Offenhäusser A, Krause HJ. Multiplex Detection of Magnetic Beads Using Offset Field Dependent Frequency Mixing Magnetic Detection. Sensors (Basel) 2021; 21:s21175859. [PMID: 34502749 PMCID: PMC8433651 DOI: 10.3390/s21175859] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/23/2021] [Accepted: 08/27/2021] [Indexed: 12/12/2022]
Abstract
Magnetic immunoassays employing Frequency Mixing Magnetic Detection (FMMD) have recently become increasingly popular for quantitative detection of various analytes. Simultaneous analysis of a sample for two or more targets is desirable in order to reduce the sample amount, save consumables, and save time. We show that different types of magnetic beads can be distinguished according to their frequency mixing response to a two-frequency magnetic excitation at different static magnetic offset fields. We recorded the offset field dependent FMMD response of two different particle types at frequencies f1 + n⋅f2, n = 1, 2, 3, 4 with f1 = 30.8 kHz and f2 = 63 Hz. Their signals were clearly distinguishable by the locations of the extremes and zeros of their responses. Binary mixtures of the two particle types were prepared with different mixing ratios. The mixture samples were analyzed by determining the best linear combination of the two pure constituents that best resembled the measured signals of the mixtures. Using a quadratic programming algorithm, the mixing ratios could be determined with an accuracy of greater than 14%. If each particle type is functionalized with a different antibody, multiplex detection of two different analytes becomes feasible.
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Affiliation(s)
- Ali Mohammad Pourshahidi
- Institute of Biological Information Processing-Biolelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany; (A.M.P.); (S.A.); (M.M.N.); (A.O.)
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062 Aachen, Germany
| | - Stefan Achtsnicht
- Institute of Biological Information Processing-Biolelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany; (A.M.P.); (S.A.); (M.M.N.); (A.O.)
- Institute of Nano- and Biotechnologies (INB), FH Aachen University of Applied Sciences, 52428 Jülich, Germany
| | - Mrinal Murali Nambipareechee
- Institute of Biological Information Processing-Biolelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany; (A.M.P.); (S.A.); (M.M.N.); (A.O.)
| | - Andreas Offenhäusser
- Institute of Biological Information Processing-Biolelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany; (A.M.P.); (S.A.); (M.M.N.); (A.O.)
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52062 Aachen, Germany
| | - Hans-Joachim Krause
- Institute of Biological Information Processing-Biolelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany; (A.M.P.); (S.A.); (M.M.N.); (A.O.)
- Institute of Nano- and Biotechnologies (INB), FH Aachen University of Applied Sciences, 52428 Jülich, Germany
- Correspondence: h.-; Tel.: +49-2461-61-2955
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21
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Wolf NR, Rai P, Glass M, Milos F, Maybeck V, Offenhäusser A, Wördenweber R. Mechanical and Electronic Cell-Chip Interaction of APTES-Functionalized Neuroelectronic Interfaces. ACS Appl Bio Mater 2021; 4:6326-6337. [PMID: 35006867 DOI: 10.1021/acsabm.1c00576] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, we analyze the impact of a chip coating with a self-assembled monolayer (SAM) of (3-aminopropyl)triethoxysilane (APTES) on the electronic and mechanical properties of neuroelectronic interfaces. We show that the large signal transfer, which has been observed for these interfaces, is most likely a consequence of the strong mechanical coupling between cells and substrate. On the one hand, we demonstrate that the impedance of the interface between Pt electrodes and an electrolyte is slightly reduced by the APTES SAM. However, this reduction of approximately 13% is definitely not sufficient to explain the large signal transfer of APTES coated electrodes demonstrated previously. On the other hand, the APTES coating leads to a stronger mechanical clamping of the cells, which is visible in microscopic images of the cell development of APTES-coated substrates. This stronger mechanical interaction is most likely caused by the positively charged amino functional group of the APTES SAM. It seems to lead to a smaller cleft between substrate and cells and, thus, to reduced losses of the cell's action potential signal at the electrode. The disadvantage of this tight binding of the cells to the rigid, planar substrate seems to be the short lifetime of the cells. In our case the density of living cells starts to decrease together with the visual deformation of the cells typically at DIV 9. Solutions for this problem might be the use of soft substrates and/or the replacement of the short APTES molecules with larger molecules or molecular multilayers.
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Affiliation(s)
- Nikolaus R Wolf
- Institute of Biological Information Processing - Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Pratika Rai
- Institute of Biological Information Processing - Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Manuel Glass
- Institute of Biological Information Processing - Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Frano Milos
- Institute of Biological Information Processing - Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Vanessa Maybeck
- Institute of Biological Information Processing - Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing - Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Roger Wördenweber
- Institute of Biological Information Processing - Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
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22
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Grob L, Rinklin P, Zips S, Mayer D, Weidlich S, Terkan K, Weiß LJK, Adly N, Offenhäusser A, Wolfrum B. Inkjet-Printed and Electroplated 3D Electrodes for Recording Extracellular Signals in Cell Culture. Sensors (Basel) 2021; 21:3981. [PMID: 34207725 PMCID: PMC8229631 DOI: 10.3390/s21123981] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/04/2021] [Accepted: 06/06/2021] [Indexed: 02/07/2023]
Abstract
Recent investigations into cardiac or nervous tissues call for systems that are able to electrically record in 3D as opposed to 2D. Typically, challenging microfabrication steps are required to produce 3D microelectrode arrays capable of recording at the desired position within the tissue of interest. As an alternative, additive manufacturing is becoming a versatile platform for rapidly prototyping novel sensors with flexible geometric design. In this work, 3D MEAs for cell-culture applications were fabricated using a piezoelectric inkjet printer. The aspect ratio and height of the printed 3D electrodes were user-defined by adjusting the number of deposited droplets of silver nanoparticle ink along with a continuous printing method and an appropriate drop-to-drop delay. The Ag 3D MEAs were later electroplated with Au and Pt in order to reduce leakage of potentially cytotoxic silver ions into the cellular medium. The functionality of the array was confirmed using impedance spectroscopy, cyclic voltammetry, and recordings of extracellular potentials from cardiomyocyte-like HL-1 cells.
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Affiliation(s)
- Leroy Grob
- Neuroelectronics, Department of Electrical and Computer Engineering, MSB, MSRM, Technical University of Munich, Boltzmannstraße 11, 85748 Garching, Germany; (L.G.); (P.R.); (S.Z.); (K.T.); (L.J.K.W.); (N.A.)
| | - Philipp Rinklin
- Neuroelectronics, Department of Electrical and Computer Engineering, MSB, MSRM, Technical University of Munich, Boltzmannstraße 11, 85748 Garching, Germany; (L.G.); (P.R.); (S.Z.); (K.T.); (L.J.K.W.); (N.A.)
| | - Sabine Zips
- Neuroelectronics, Department of Electrical and Computer Engineering, MSB, MSRM, Technical University of Munich, Boltzmannstraße 11, 85748 Garching, Germany; (L.G.); (P.R.); (S.Z.); (K.T.); (L.J.K.W.); (N.A.)
| | - Dirk Mayer
- Institute of Biological Information Processing (IBI-3), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany; (D.M.); (S.W.); (A.O.)
| | - Sabrina Weidlich
- Institute of Biological Information Processing (IBI-3), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany; (D.M.); (S.W.); (A.O.)
| | - Korkut Terkan
- Neuroelectronics, Department of Electrical and Computer Engineering, MSB, MSRM, Technical University of Munich, Boltzmannstraße 11, 85748 Garching, Germany; (L.G.); (P.R.); (S.Z.); (K.T.); (L.J.K.W.); (N.A.)
| | - Lennart J. K. Weiß
- Neuroelectronics, Department of Electrical and Computer Engineering, MSB, MSRM, Technical University of Munich, Boltzmannstraße 11, 85748 Garching, Germany; (L.G.); (P.R.); (S.Z.); (K.T.); (L.J.K.W.); (N.A.)
| | - Nouran Adly
- Neuroelectronics, Department of Electrical and Computer Engineering, MSB, MSRM, Technical University of Munich, Boltzmannstraße 11, 85748 Garching, Germany; (L.G.); (P.R.); (S.Z.); (K.T.); (L.J.K.W.); (N.A.)
| | - Andreas Offenhäusser
- Institute of Biological Information Processing (IBI-3), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany; (D.M.); (S.W.); (A.O.)
| | - Bernhard Wolfrum
- Neuroelectronics, Department of Electrical and Computer Engineering, MSB, MSRM, Technical University of Munich, Boltzmannstraße 11, 85748 Garching, Germany; (L.G.); (P.R.); (S.Z.); (K.T.); (L.J.K.W.); (N.A.)
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23
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Liang Y, Offenhäusser A, Ingebrandt S, Mayer D. PEDOT:PSS-Based Bioelectronic Devices for Recording and Modulation of Electrophysiological and Biochemical Cell Signals. Adv Healthc Mater 2021; 10:e2100061. [PMID: 33970552 DOI: 10.1002/adhm.202100061] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/31/2021] [Indexed: 12/16/2022]
Abstract
To understand the physiology and pathology of electrogenic cells and the corresponding tissue in their full complexity, the quantitative investigation of the transmission of ions as well as the release of chemical signals is important. Organic (semi-) conducting materials and in particular organic electrochemical transistor are gaining in importance for the investigation of electrophysiological and recently biochemical signals due to their synthetic nature and thus chemical diversity and modifiability, their biocompatible and compliant properties, as well as their mixed electronic and ionic conductivity featuring ion-to-electron conversion. Here, the aim is to summarize recent progress on the development of bioelectronic devices utilizing polymer polyethylenedioxythiophene: poly(styrene sulfonate) (PEDOT:PSS) to interface electronics and biological matter including microelectrode arrays, neural cuff electrodes, organic electrochemical transistors, PEDOT:PSS-based biosensors, and organic electronic ion pumps. Finally, progress in the material development is summarized for the improvement of polymer conductivity, stretchability, higher transistor transconductance, or to extend their field of application such as cation sensing or metabolite recognition. This survey of recent trends in PEDOT:PSS electrophysiological sensors highlights the potential of this multifunctional material to revolve current technology and to enable long-lasting, multichannel polymer probes for simultaneous recordings of electrophysiological and biochemical signals from electrogenic cells.
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Affiliation(s)
- Yuanying Liang
- Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou Guangdong 510640 China
| | - Andreas Offenhäusser
- Institute of Biological Information Processing Bioelectronics IBI‐3 Forschungszentrum Jülich Jülich 52425 Germany
| | - Sven Ingebrandt
- Faculty of Electrical Engineering and Information Technology Institute of Materials in Electrical Engineering 1 RWTH Aachen University Aachen 52074 Germany
| | - Dirk Mayer
- Institute of Biological Information Processing Bioelectronics IBI‐3 Forschungszentrum Jülich Jülich 52425 Germany
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24
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Milos F, Tullii G, Gobbo F, Lodola F, Galeotti F, Verpelli C, Mayer D, Maybeck V, Offenhäusser A, Antognazza MR. High Aspect Ratio and Light-Sensitive Micropillars Based on a Semiconducting Polymer Optically Regulate Neuronal Growth. ACS Appl Mater Interfaces 2021; 13:23438-23451. [PMID: 33983012 PMCID: PMC8161421 DOI: 10.1021/acsami.1c03537] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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] [Indexed: 05/04/2023]
Abstract
Many nano- and microstructured devices capable of promoting neuronal growth and network formation have been previously investigated. In certain cases, topographical cues have been successfully complemented with external bias, by employing electrically conducting scaffolds. However, the use of optical stimulation with topographical cues was rarely addressed in this context, and the development of light-addressable platforms for modulating and guiding cellular growth and proliferation remains almost completely unexplored. Here, we develop high aspect ratio micropillars based on a prototype semiconducting polymer, regioregular poly(3-hexylthiophene-2,5-diyl) (P3HT), as an optically active, three-dimensional platform for embryonic cortical neurons. P3HT micropillars provide a mechanically compliant environment and allow a close contact with neuronal cells. The combined action of nano/microtopography and visible light excitation leads to effective optical modulation of neuronal growth and orientation. Embryonic neurons cultured on polymer pillars show a clear polarization effect and, upon exposure to optical excitation, a significant increase in both neurite and axon length. The biocompatible, microstructured, and light-sensitive platform developed here opens up the opportunity to optically regulate neuronal growth in a wireless, repeatable, and spatio-temporally controlled manner without genetic modification. This approach may be extended to other cell models, thus uncovering interesting applications of photonic devices in regenerative medicine.
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Affiliation(s)
- Frano Milos
- Institute
of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- RWTH
University Aachen, 52062 Aachen, Germany
| | - Gabriele Tullii
- Center
for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, 20133 Milano, Italy
| | - Federico Gobbo
- Center
for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, 20133 Milano, Italy
- Physics
Department, Politecnico di Milano, Piazza L. Da Vinci 32, 20133 Milano, Italy
| | - Francesco Lodola
- Center
for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, 20133 Milano, Italy
| | - Francesco Galeotti
- Istituto
di Scienze e Tecnologie Chimiche G. Natta (SCITEC), Consiglio Nazionale delle Ricerche, 20133 Milano, Italy
| | - Chiara Verpelli
- Istituto
di Neuroscienze, Consiglio Nazionale delle
Ricerche, 20133 Milano, Italy
| | - Dirk Mayer
- Institute
of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Vanessa Maybeck
- Institute
of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Andreas Offenhäusser
- Institute
of Biological Information Processing IBI-3, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
- RWTH
University Aachen, 52062 Aachen, Germany
| | - Maria Rosa Antognazza
- Center
for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, 20133 Milano, Italy
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25
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Abstract
Electrochemical sensors that can determine single/multiple analytes remain a key challenge in miniaturized analytical systems and devices. In this study, we present in situ synthesis and modification of gold nanodendrite electrodes to create an electrochemical system for the analysis of hydrogen peroxide. The sensor system consisted of the reference and counter electrodes as well as the working electrode. Electrochemical reduction of graphene oxide, ErGO, on the thin-film gold and gold nanodendrite working electrodes was used to achieve an efficient sensor interface for the adsorption of a biomimetic electrocatalytic sensor material, Mn(III) meso-tetra(N-methyl-4-pyridyl) porphyrin complex, with as high as 10-10 mol cm-2 surface coverage. The sensor system demonstrated a detection limit of 0.3 µM H2O2 in the presence of oxygen. Electrochemical determination of hydrogen peroxide in plant material in the concentration range from 0.09 to 0.4 µmol (gFW)-1 using the electrochemical sensor system was shown as well as in vivo real-time monitoring of the hydrogen peroxide dynamics as a sign of abiotic stress (intense sunlight). Results of the electrochemical determination were in good agreement with the results of biochemical analysis with the spectrophotometric detection. We anticipate that this method can be extended for the synthesis and integration of multisensor arrays in analytical microsystems and devices for the quantification and real-time in vivo monitoring of other analytes and biomarkers.
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Affiliation(s)
- Yulia G Mourzina
- Institute of Biological Information Processing - Bioelectronics (IBI-3), Forschungszentrum Jülich, Jülich, Germany
| | - Yuri E Ermolenko
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg, Russia
| | - Andreas Offenhäusser
- Institute of Biological Information Processing - Bioelectronics (IBI-3), Forschungszentrum Jülich, Jülich, Germany
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26
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Nikolaev KG, Ermakov SS, Ermolenko YE, Navolotskaya DV, Offenhäusser A, Mourzina YG. Horseradish Peroxidase-Based Biosensors with Different Nanotransducers for the Determination of Hydrogen Peroxide. J Anal Chem 2021. [DOI: 10.1134/s1061934821040080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Milos F, Belu A, Mayer D, Maybeck V, Offenhäusser A. Polymer Nanopillars Induce Increased Paxillin Adhesion Assembly and Promote Axon Growth in Primary Cortical Neurons. Adv Biol (Weinh) 2021. [DOI: 10.1002/adbi.202000248] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Frano Milos
- Institute of Biological Information Processing IBI‐3 Forschungszentrum Jülich GmbH Jülich 52425 Germany
- RWTH Aachen Aachen Germany
| | - Andreea Belu
- Department of Anesthesiology and Intensive Care Medicine University Hospital of Cologne Cologne 50931 Germany
| | - Dirk Mayer
- Institute of Biological Information Processing IBI‐3 Forschungszentrum Jülich GmbH Jülich 52425 Germany
| | - Vanessa Maybeck
- Institute of Biological Information Processing IBI‐3 Forschungszentrum Jülich GmbH Jülich 52425 Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing IBI‐3 Forschungszentrum Jülich GmbH Jülich 52425 Germany
- RWTH Aachen Aachen Germany
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28
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Markov A, Wördenweber R, Ichkitidze L, Gerasimenko A, Kurilova U, Suetina I, Mezentseva M, Offenhäusser A, Telyshev D. Biocompatible SWCNT Conductive Composites for Biomedical Applications. Nanomaterials (Basel) 2020; 10:E2492. [PMID: 33322503 PMCID: PMC7763503 DOI: 10.3390/nano10122492] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/27/2020] [Accepted: 12/09/2020] [Indexed: 02/03/2023]
Abstract
The efficiency of devices for biomedical applications, including tissue engineering and neuronal stimulation, heavily depends on their biocompatibility and performance level. Therefore, it is important to find adequate materials that meet the necessary requirements such as (i) being intrinsically compatible with biological systems, (ii) providing a sufficient electronic conductivity that promotes efficient signal transduction, (iii) having "soft" mechanical properties comparable to biological structures, and (iv) being degradable in physiological solution. We have developed organic conducting biocompatible single-walled carbon nanotubes (SWCNT) composites based on bovine serum albumin, carboxymethylcellulose, and acrylic polymer and investigated their properties, which are relevant for biomedical applications. This includes ζ-potential measurements, conductivity analyses, and SEM micrographs, the latter providing a local analysis of SWCNT distribution in the base material. We observed the development of the electrical conductivity of the SWCNT composites exposed to 1 mM KCl electrolyte for 40 days, representing a high stability of the samples. The conductivity of samples reaches 1300 S/m for 0.45 wt.% nanotubes. Moreover, we demonstrated the biocompatibility of the composites via cultivating fibroblast cell culture. Finally, we showed that composite coating results in the longer lifespan of cells on the surface. Overall, the SWCNT-based conductive composites might be a promising material for extended biomedical applications.
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Affiliation(s)
- Aleksandr Markov
- Institute for Bionic Technologies and Engineering, I. M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia; (L.I.); (A.G.); (D.T.)
| | - Roger Wördenweber
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Research Center Jülich, 52425 Jülich, Germany; (R.W.); (A.O.)
| | - Levan Ichkitidze
- Institute for Bionic Technologies and Engineering, I. M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia; (L.I.); (A.G.); (D.T.)
- Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, 124498 Moscow, Russia;
| | - Alexander Gerasimenko
- Institute for Bionic Technologies and Engineering, I. M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia; (L.I.); (A.G.); (D.T.)
- Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, 124498 Moscow, Russia;
| | - Ulyana Kurilova
- Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, 124498 Moscow, Russia;
| | - Irina Suetina
- Ivanovsky Institute of Virology, N. F. Gamaleya National Center of Epidemiology and Microbiology, 123098 Moscow, Russia; (I.S.); (M.M.)
| | - Marina Mezentseva
- Ivanovsky Institute of Virology, N. F. Gamaleya National Center of Epidemiology and Microbiology, 123098 Moscow, Russia; (I.S.); (M.M.)
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Research Center Jülich, 52425 Jülich, Germany; (R.W.); (A.O.)
| | - Dmitry Telyshev
- Institute for Bionic Technologies and Engineering, I. M. Sechenov First Moscow State Medical University, 119991 Moscow, Russia; (L.I.); (A.G.); (D.T.)
- Institute of Biomedical Systems, National Research University of Electronic Technology, Zelenograd, 124498 Moscow, Russia;
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29
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Lenyk B, Figueroa‐Miranda G, Pavlushko I, Lo Y, Tanner JA, Offenhäusser A, Mayer D. Dual‐Transducer Malaria Aptasensor Combining Electrochemical Impedance and Surface Plasmon Polariton Detection on Gold Nanohole Arrays. ChemElectroChem 2020. [DOI: 10.1002/celc.202001212] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Bohdan Lenyk
- Institute of Biological Information Processing (IBI-3) Forschungszentrum Jülich 52428 Jülich Germany
- Department of Physics University of Konstanz 78464 Konstanz Germany
| | - Gabriela Figueroa‐Miranda
- Institute of Biological Information Processing (IBI-3) Forschungszentrum Jülich 52428 Jülich Germany
- RWTH Aachen University Aachen 52062 Germany
| | - Ivan Pavlushko
- Institute of Biological Information Processing (IBI-3) Forschungszentrum Jülich 52428 Jülich Germany
- Faculty of Radio Physics Electronics and Computer Systems Taras Shevchenko National University of Kyiv Kyiv 03680 Ukraine
| | - Young Lo
- School of Biomedical Sciences Li Ka Shing Faculty of Medicine The University of Hong Kong Pokfulam, Hong Kong Special Administrative Region China
| | - Julian A. Tanner
- School of Biomedical Sciences Li Ka Shing Faculty of Medicine The University of Hong Kong Pokfulam, Hong Kong Special Administrative Region China
| | - Andreas Offenhäusser
- Institute of Biological Information Processing (IBI-3) Forschungszentrum Jülich 52428 Jülich Germany
- RWTH Aachen University Aachen 52062 Germany
| | - Dirk Mayer
- Institute of Biological Information Processing (IBI-3) Forschungszentrum Jülich 52428 Jülich Germany
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30
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Rincón Montes V, Gehlen J, Ingebrandt S, Mokwa W, Walter P, Müller F, Offenhäusser A. Development and in vitro validation of flexible intraretinal probes. Sci Rep 2020; 10:19836. [PMID: 33199768 PMCID: PMC7669900 DOI: 10.1038/s41598-020-76582-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/28/2020] [Indexed: 12/01/2022] Open
Abstract
The efforts to improve the treatment efficacy in blind patients with retinal degenerative diseases would greatly benefit from retinal activity feedback, which is lacking in current retinal implants. While the door for a bidirectional communication device that stimulates and records intraretinally has been opened by the recent use of silicon-based penetrating probes, the biological impact induced by the insertion of such rigid devices is still unknown. Here, we developed for the first time, flexible intraretinal probes and validated in vitro the acute biological insertion impact in mouse retinae compared to standard silicon-based probes. Our results show that probes based on flexible materials, such as polyimide and parylene-C, in combination with a narrow shank design 50 µm wide and 7 µm thick, and the use of insertion speeds as high as 187.5 µm/s will successfully penetrate the retina, reduce the footprint of the insertion to roughly 2 times the cross-section of the probe, and induce low dead cell counts, while keeping the vitality of the tissue and recording the neural activity at different depths.
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Affiliation(s)
- V Rincón Montes
- Bioelectronics, Institute of Biological Information Processing-3, Forschungszentrum Jülich, Jülich, Germany
- RWTH Aachen University, Aachen, Germany
| | - J Gehlen
- Molecular and Cellular Physiology, Institute of Biological Information Processing-1, Forschungszentrum Jülich, Jülich, Germany
| | - S Ingebrandt
- Institute of Materials in Electrical Engineering 1, RWTH Aachen University, Aachen, Germany
| | - W Mokwa
- Institute of Materials in Electrical Engineering 1, RWTH Aachen University, Aachen, Germany
| | - P Walter
- Department of Ophthalmology, RWTH Aachen University, Aachen, Germany
| | - F Müller
- Molecular and Cellular Physiology, Institute of Biological Information Processing-1, Forschungszentrum Jülich, Jülich, Germany
| | - A Offenhäusser
- Bioelectronics, Institute of Biological Information Processing-3, Forschungszentrum Jülich, Jülich, Germany.
- RWTH Aachen University, Aachen, Germany.
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Zabelskii D, Alekseev A, Kovalev K, Rankovic V, Balandin T, Soloviov D, Bratanov D, Savelyeva E, Podolyak E, Volkov D, Vaganova S, Astashkin R, Chizhov I, Yutin N, Rulev M, Popov A, Eria-Oliveira AS, Rokitskaya T, Mager T, Antonenko Y, Rosselli R, Armeev G, Shaitan K, Vivaudou M, Büldt G, Rogachev A, Rodriguez-Valera F, Kirpichnikov M, Moser T, Offenhäusser A, Willbold D, Koonin E, Bamberg E, Gordeliy V. Viral rhodopsins 1 are an unique family of light-gated cation channels. Nat Commun 2020; 11:5707. [PMID: 33177509 PMCID: PMC7659345 DOI: 10.1038/s41467-020-19457-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Accepted: 10/07/2020] [Indexed: 11/09/2022] Open
Abstract
Phytoplankton is the base of the marine food chain as well as oxygen and carbon cycles and thus plays a global role in climate and ecology. Nucleocytoplasmic Large DNA Viruses that infect phytoplankton organisms and regulate the phytoplankton dynamics encompass genes of rhodopsins of two distinct families. Here, we present a functional and structural characterization of two proteins of viral rhodopsin group 1, OLPVR1 and VirChR1. Functional analysis of VirChR1 shows that it is a highly selective, Na+/K+-conducting channel and, in contrast to known cation channelrhodopsins, it is impermeable to Ca2+ ions. We show that, upon illumination, VirChR1 is able to drive neural firing. The 1.4 Å resolution structure of OLPVR1 reveals remarkable differences from the known channelrhodopsins and a unique ion-conducting pathway. Thus, viral rhodopsins 1 represent a unique, large group of light-gated channels (viral channelrhodopsins, VirChR1s). In nature, VirChR1s likely mediate phototaxis of algae enhancing the host anabolic processes to support virus reproduction, and therefore, might play a major role in global phytoplankton dynamics. Moreover, VirChR1s have unique potential for optogenetics as they lack possibly noxious Ca2+ permeability. Nucleocytoplasmic Large DNA Viruses (NCLDV) that infect algae encode two distinct families of microbial rhodopsins. Here, the authors characterise two proteins form the viral rhodopsin group 1 OLPVR1 and VirChR1, present the 1.4 Å crystal structure of OLPVR1 and show that viral rhodopsins 1 are light-gated cation channels.
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Affiliation(s)
- Dmitrii Zabelskii
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Alexey Alekseev
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Institute of Crystallography, University of Aachen (RWTH), Aachen, Germany
| | - Kirill Kovalev
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Institute of Crystallography, University of Aachen (RWTH), Aachen, Germany.,Institut de Biologie Structurale (IBS), Université Grenoble Alpes, CEA, CNRS, Grenoble, France
| | - Vladan Rankovic
- Institute for Auditory Neuroscience and InnerEarLab, University Medical Center Göttingen, Göttingen, Germany.,Auditory Neuroscience and Optogenetics Laboratory, German Primate Center, Göttingen, Germany
| | - Taras Balandin
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Dmytro Soloviov
- Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Joint Institute for Nuclear Research, Dubna, Russia.,Institute for Safety Problems of Nuclear Power Plants, NAS of Ukraine, Kyiv, 03680, Ukraine
| | - Dmitry Bratanov
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Ekaterina Savelyeva
- Institute of Biological Information Processing (IBI-3: Bioelectronics), Forschungszentrum Jülich GmbH, Jülich, Germany.,Laboratory of Functional Materials and Devices for Nanoelectronics, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Center of Shared Research Facilities, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Elizaveta Podolyak
- Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Dmytro Volkov
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Svetlana Vaganova
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Roman Astashkin
- Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Institut de Biologie Structurale (IBS), Université Grenoble Alpes, CEA, CNRS, Grenoble, France
| | - Igor Chizhov
- Institute for Biophysical Chemistry, Hannover Medical School, Hannover, Germany
| | - Natalia Yutin
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD, USA
| | - Maksim Rulev
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany.,European Synchrotron Radiation Facility, Grenoble, France
| | | | - Ana-Sofia Eria-Oliveira
- Institut de Biologie Structurale (IBS), Université Grenoble Alpes, CEA, CNRS, Grenoble, France
| | - Tatiana Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Thomas Mager
- Institute for Auditory Neuroscience and InnerEarLab, University Medical Center Göttingen, Göttingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Göttingen, Germany
| | - Yuri Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Riccardo Rosselli
- Evolutionary Genomics Group, Departamento de Producción Vegetal y Microbiología, Universidad Miguel Hernández, San Juan de Alicante, Spain.,Department of Marine Microbiology and Biogeochemistry, Royal Netherland Institute for Sea Research (NIOZ), and Utrecht University, Den Burg, The Netherlands
| | - Grigoriy Armeev
- Biological Faculty, M. V. Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Konstantin Shaitan
- Biological Faculty, M. V. Lomonosov Moscow State University, Moscow, 119991, Russia.,N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, 119991, Russia
| | - Michel Vivaudou
- Institut de Biologie Structurale (IBS), Université Grenoble Alpes, CEA, CNRS, Grenoble, France.,Laboratories of Excellence, Ion Channel Science and Therapeutics, 06560, Valbonne, France
| | - Georg Büldt
- Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia
| | - Andrey Rogachev
- Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Joint Institute for Nuclear Research, Dubna, Russia
| | - Francisco Rodriguez-Valera
- Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Evolutionary Genomics Group, Departamento de Producción Vegetal y Microbiología, Universidad Miguel Hernández, San Juan de Alicante, Spain
| | - Mikhail Kirpichnikov
- Biological Faculty, M. V. Lomonosov Moscow State University, Moscow, 119991, Russia.,M. M. Shemyakin-Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
| | - Tobias Moser
- Institute for Auditory Neuroscience and InnerEarLab, University Medical Center Göttingen, Göttingen, Germany.,Auditory Neuroscience and Optogenetics Laboratory, German Primate Center, Göttingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Göttingen, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing (IBI-3: Bioelectronics), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Dieter Willbold
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany.,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany.,Institut für Physikalische Biologie, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Eugene Koonin
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, MD, USA
| | - Ernst Bamberg
- Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia.,Max Planck Institute of Biophysics, Frankfurt am Main, Germany
| | - Valentin Gordeliy
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich GmbH, Jülich, Germany. .,JuStruct: Jülich Center for Structural Biology, Forschungszentrum Jülich GmbH, Jülich, Germany. .,Research Center for Molecular Mechanisms of Aging and Age-related Diseases, Moscow Institute of Physics and Technology, Dolgoprudny, Russia. .,Institute of Crystallography, University of Aachen (RWTH), Aachen, Germany. .,Institut de Biologie Structurale (IBS), Université Grenoble Alpes, CEA, CNRS, Grenoble, France.
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Wolf NR, Yuan X, Hassani H, Milos F, Mayer D, Breuer U, Offenhäusser A, Wördenweber R. Surface Functionalization of Platinum Electrodes with APTES for Bioelectronic Applications. ACS Appl Bio Mater 2020; 3:7113-7121. [PMID: 35019371 DOI: 10.1021/acsabm.0c00936] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 11/30/2022]
Abstract
The interface between electronic components and biological objects plays a crucial role in the success of bioelectronic devices. Since the electronics typically include different elements such as an insulating substrate in combination with conducting electrodes, an important issue of bioelectronics involves tailoring and optimizing the interface for any envisioned applications. In this paper, we present a method for functionalizing insulating substrates (SiO2) and metallic electrodes (Pt) simultaneously with a stable monolayer of organic molecules ((3-aminopropyl)triethoxysilane (APTES)). This monolayer is characterized by high molecule density, long-term stability, and positive surface net charge and most likely represents a self-assembled monolayer (SAM). It facilitates the conversion of biounfriendly Pt surfaces into biocompatible surfaces, which allows cell growth (neurons) on both functionalized components, SiO2 and Pt, which is comparable to that of reference samples coated with poly-L-lysine (PLL). Moreover, the functionalization greatly improves the electronic cell-chip coupling, thereby enabling the recording of action potential signals of several millivolts at APTES-functionalized Pt electrodes.
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Affiliation(s)
- Nikolaus R Wolf
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Xiaobo Yuan
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Hossein Hassani
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Frano Milos
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Uwe Breuer
- Central Institute for Engineering, Electronics and Analytics-Analytics (ZEA-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Roger Wördenweber
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
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Gruteser N, Kohlhas V, Balfanz S, Franzen A, Günther A, Offenhäusser A, Müller F, Nikolaev V, Lohse MJ, Baumann A. Establishing a sensitive fluorescence-based quantification method for cyclic nucleotides. BMC Biotechnol 2020; 20:47. [PMID: 32854679 PMCID: PMC7450941 DOI: 10.1186/s12896-020-00633-y] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 07/21/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Approximately 40% of prescribed drugs exert their activity via GTP-binding protein-coupled receptors (GPCRs). Once activated, these receptors cause transient changes in the concentration of second messengers, e.g., cyclic adenosine 3',5'-monophosphate (cAMP). Specific and efficacious genetically encoded biosensors have been developed to monitor cAMP fluctuations with high spatial and temporal resolution in living cells or tissue. A well characterized biosensor for cAMP is the Förster resonance energy transfer (FRET)-based Epac1-camps protein. Pharmacological characterization of newly developed ligands acting at GPCRs often includes numerical quantification of the second messenger amount that was produced. RESULTS To quantify cellular cAMP concentrations, we bacterially over-expressed and purified Epac1-camps and applied the purified protein in a cell-free detection assay for cAMP in a multi-well format. We found that the biosensor can detect as little as 0.15 pmol of cAMP, and that the sensitivity is not impaired by non-physiological salt concentrations or pH values. Notably, the assay tolerated desiccation and storage of the protein without affecting Epac1-camps cyclic nucleotide sensitivity. CONCLUSIONS We found that determination cAMP in lysates obtained from cell assays or tissue samples by purified Epac1-camps is a robust, fast, and sensitive assay suitable for routine and high throughput analyses.
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Affiliation(s)
- Nadine Gruteser
- Institute of Biological Information Processing (Molecular and Cellular Physiology, IBI-1), Forschungszentrum Jülich, 52428, Jülich, Germany
| | - Viktoria Kohlhas
- Institute of Biological Information Processing (Molecular and Cellular Physiology, IBI-1), Forschungszentrum Jülich, 52428, Jülich, Germany.,Present address: CECAD Research Center, 50931, Cologne, Germany
| | - Sabine Balfanz
- Institute of Biological Information Processing (Molecular and Cellular Physiology, IBI-1), Forschungszentrum Jülich, 52428, Jülich, Germany
| | - Arne Franzen
- Institute of Biological Information Processing (Molecular and Cellular Physiology, IBI-1), Forschungszentrum Jülich, 52428, Jülich, Germany
| | - Anne Günther
- Institute of Biological Information Processing (Molecular and Cellular Physiology, IBI-1), Forschungszentrum Jülich, 52428, Jülich, Germany.,Present address: RIKEN Center for Brain Science, Wako, Saitama, 351-0198, Japan
| | - Andreas Offenhäusser
- Institute of Biological Information Processing (Bioelectronics, IBI-3), Forschungszentrum Jülich, 52428, Jülich, Germany
| | - Frank Müller
- Institute of Biological Information Processing (Molecular and Cellular Physiology, IBI-1), Forschungszentrum Jülich, 52428, Jülich, Germany
| | - Viacheslav Nikolaev
- Institute of Experimental Cardiovascular Research, University Medical Center Hamburg-Eppendorf, 20246, Hamburg, Germany
| | - Martin J Lohse
- Institute of Pharmacology and Toxicology, University of Würzburg, 97078, Würzburg, Germany.,Max Delbrück Center for Molecular Medicine, 13125, Berlin, Germany
| | - Arnd Baumann
- Institute of Biological Information Processing (Molecular and Cellular Physiology, IBI-1), Forschungszentrum Jülich, 52428, Jülich, Germany.
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Zhang Y, Figueroa-Miranda G, Wu C, Willbold D, Offenhäusser A, Mayer D. Electrochemical dual-aptamer biosensors based on nanostructured multielectrode arrays for the detection of neuronal biomarkers. Nanoscale 2020; 12:16501-16513. [PMID: 32729601 DOI: 10.1039/d0nr03421e] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Multielectrode arrays (MEAs) have been increasingly used for the development of biosensors due to their capability to record signals from multiple channels, fast mass transfer rates, and high spatial resolution. Alzheimer's disease (AD) is often associated with mitochondrial dysfunction, which is closely related to reduced levels of adenosine triphosphate (ATP). Therefore, simultaneous detection of ATP together with amyloid-β oligomers (AβO), a reliable biomarker for AD, can potentially advance the early detection of Alzheimer's disease. In this work, a dual-aptamer modified MEA chip was developed that consists of microelectrodes modified with electrodeposited 3D nanostructures (3D-GMEs). Electrodeposition methods, deposition potential, and deposition time were systematically altered and the active surface areas as well as the electrode morphologies were characterized by cyclic voltammetry and scanning electron microscopy. The nanostructured microelectrodes were sequentially modified with AβO and ATP specific aptamer receptors. To achieve the modification of different aptamer receptors at different 3D-GMEs of the same MEA chip, electrochemical cleaning was applied to individual 3D-GMEs. Ferrocene labels were attached to the aptamer receptors to enable amperometric signaling after target-aptamer binding. The developed aptasensor showed a linear detection range from 1 pM to 200 nM for the detection of AβO and from 0.01 nM to 1000 nM for the detection of ATP. Finally, ATP and AβO were detected simultaneously in the same analyte solution by the same sensor chip, which could support the early detection of AD, provide comprehensive information about the health status of the patient, and be helpful for pathological studies of neurodegenerative diseases.
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Affiliation(s)
- Yuting Zhang
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
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Lenyk B, Schöps V, Boneberg J, Kabdulov M, Huhn T, Scheer E, Offenhäusser A, Mayer D. Surface Plasmon-Enhanced Switching Kinetics of Molecular Photochromic Films on Gold Nanohole Arrays. Nano Lett 2020; 20:5243-5250. [PMID: 32520573 DOI: 10.1021/acs.nanolett.0c01569] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Diarylethene molecules are discussed as possible optical switches, which can reversibly transition between completely conjugated (closed) and nonconjugated (open) forms with different electrical conductance and optical absorbance, by exposure to UV and visible light. However, in general the opening reaction exhibits much lower quantum yield than the closing process, hindering their usage in optoelectronic devices. To enhance the opening process, which is supported by visible light, we employ the plasmonic field enhancement of gold films perforated with nanoholes. We show that gold nanohole arrays reveal strong optical transmission in the visible range (∼60%) and pronounced enhancement of field intensities, resulting in around 50% faster switching kinetics of the molecular species in comparison with quartz substrates. The experimental UV-vis measurements are verified with finite-difference time-domain simulation that confirm the obtained results. Thus, we propose gold nanohole arrays as transparent and conductive plasmonic material that accelerates visible-light-triggered chemical reactions including molecular switching.
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Affiliation(s)
- Bohdan Lenyk
- Institute of Biological Information Processing (IBI-3), Forschungszentrum Jülich, 52428 Jülich, Germany
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - Volker Schöps
- Institute of Biological Information Processing (IBI-3), Forschungszentrum Jülich, 52428 Jülich, Germany
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - Johannes Boneberg
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - Mikhail Kabdulov
- Department of Chemistry, University of Konstanz, 78457 Konstanz, Germany
| | - Thomas Huhn
- Department of Chemistry, University of Konstanz, 78457 Konstanz, Germany
| | - Elke Scheer
- Department of Physics, University of Konstanz, 78457 Konstanz, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing (IBI-3), Forschungszentrum Jülich, 52428 Jülich, Germany
| | - Dirk Mayer
- Institute of Biological Information Processing (IBI-3), Forschungszentrum Jülich, 52428 Jülich, Germany
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Figueroa-Miranda G, Wu C, Zhang Y, Nörbel L, Lo Y, Tanner JA, Elling L, Offenhäusser A, Mayer D. Polyethylene glycol-mediated blocking and monolayer morphology of an electrochemical aptasensor for malaria biomarker detection in human serum. Bioelectrochemistry 2020; 136:107589. [PMID: 32679336 DOI: 10.1016/j.bioelechem.2020.107589] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 12/22/2022]
Abstract
Better approaches are critically needed for in situ point-of-care diagnostic biosensors that enable primary care physicians, or even individual patients, to directly analyze biological fluids without complicated sample pretreatments. Additional purification steps consume time, consume reagents, often require other equipment, and can introduce false-negative results. Biosensors have been modified with blocking molecules to reduce biofouling; however, the effectiveness relies on their chemical composition and morphology. Here, we used a polyethylene glycol film to suppress unspecific binding from human serum on an electrochemical malaria aptasensor. A detailed study of the variation of the chemical and morphological composition of the aptamer/polyethylene glycol mixed monolayer as a function of incubation time was conducted. Higher resistance to matrix biofouling was found for polyethylene glycol than for hydrophobic alkanethiol films. The best sensor performance was observed for intermediate polyethylene glycol immobilization times. With prolonged incubation, phase separation of aptamer, and polyethylene glycol molecules locally increased the aptamer density and thereby diminished the analyte binding capability. Remarkably, polyethylene glycols do not affect the aptasensor sensitivity but enhance the complex matrix tolerance, the dynamic range, and the limit of detection. Careful tuning of the blocking molecule immobilization is crucial to achieving high aptasensor performance and biofouling resistance.
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Affiliation(s)
- Gabriela Figueroa-Miranda
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Jülich, Germany; Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | - Changtong Wu
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Yuting Zhang
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Lena Nörbel
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Young Lo
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region
| | - Julian Alexander Tanner
- School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region
| | - Lothar Elling
- Laboratory for Biomaterials, Institute for Biotechnology and Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University, Aachen, Germany
| | - Andreas Offenhäusser
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Dirk Mayer
- Institute of Biological Information Processing, Bioelectronics (IBI-3), Forschungszentrum Jülich GmbH, Jülich, Germany.
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Hassani H, Wolf NR, Yuan X, Wördenweber R, Offenhäusser A. Platinum substrate for surface plasmon microscopy at small angles. Opt Lett 2020; 45:3292-3295. [PMID: 32538965 DOI: 10.1364/ol.396051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 05/15/2020] [Indexed: 06/11/2023]
Abstract
Platinum is reported as the main component of the substrate in surface plasmon microscopy of the metal-dielectric interface for small-angle measurements. In the absence of a narrow dip in the angular spectrum of platinum, the refractive index of the dielectric medium or the thickness of a deposited layer is proven deducible from the observed sharp peak, close to the critical angle. The sensitivities of refractive index and thickness measurements using platinum are compared with that of a gold surface plasmon resonance chip. Furthermore, the thickness of a structured layer of (3-Aminopropyl)triethoxysilane on the platinum substrate is measured to be 0.7 nm, demonstrating the high sensitivity of the technique.
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38
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Mourzina YG, Offenhäusser A. Electrochemical properties and biomimetic activity of water-soluble meso-substituted Mn(III) porphyrin complexes in the electrocatalytic reduction of hydrogen peroxide. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114159] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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39
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Yuan X, Wolf N, Hondrich TJJ, Shokoohimehr P, Milos F, Glass M, Mayer D, Maybeck V, Prömpers M, Offenhäusser A, Wördenweber R. Engineering Biocompatible Interfaces via Combinations of Oxide Films and Organic Self-Assembled Monolayers. ACS Appl Mater Interfaces 2020; 12:17121-17129. [PMID: 32186363 DOI: 10.1021/acsami.0c02141] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this paper, we demonstrate that cell adhesion and neuron maturation can be guided by patterned oxide surfaces functionalized with organic molecular layers. It is shown that the difference in the surface potential of various oxides (SiO2, Ta2O5, TiO2, and Al2O3) can be increased by functionalization with a silane, (3-aminopropyl)-triethoxysilane (APTES), which is deposited from the gas phase on the oxide. Furthermore, it seems that only physisorbed layers (no chemical binding) can be achieved for some oxides (Ta2O5 and TiO2), whereas self-assembled monolayers (SAM) form on other oxides (SiO2 and Al2O3). This does not only alter the surface potential but also affects the neuronal cell growth. The already high cell density on SiO2 is increased further by the chemically bound APTES SAM, whereas the already low cell density on Ta2O5 is even further reduced by the physisorbed APTES layer. As a result, the cell density is ∼8 times greater on SiO2 compared to Ta2O5, both coated with APTES. Furthermore, neurons form the typical networks on SiO2, whereas they tend to cluster to form neurospheres on Ta2O5. Using lithographically patterned Ta2O5 layers on SiO2 substrates functionalized with APTES, the guided growth can be transferred to complex patterns. Cell cultures and molecular layers can easily be removed, and the cell experiment can be repeated after functionalization of the patterned oxide surface with APTES. Thus, the combination of APTES-functionalized patterned oxides might offer a promising way of achieving guided neuronal growth on robust and reusable substrates.
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Affiliation(s)
- Xiaobo Yuan
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Nikolaus Wolf
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Timm J J Hondrich
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Pegah Shokoohimehr
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Frano Milos
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Manuel Glass
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Dirk Mayer
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Vanessa Maybeck
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Michael Prömpers
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Andreas Offenhäusser
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
| | - Roger Wördenweber
- Institute of Complex Systems-Bioelectronics (ICS-8), Forschungszentrum Jülich, Jülich 52428, Germany
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Kutovyi Y, Hlukhova H, Boichuk N, Menger M, Offenhäusser A, Vitusevich S. Amyloid-beta peptide detection via aptamer-functionalized nanowire sensors exploiting single-trap phenomena. Biosens Bioelectron 2020; 154:112053. [DOI: 10.1016/j.bios.2020.112053] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/23/2020] [Accepted: 01/24/2020] [Indexed: 12/12/2022]
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Beale C, Hamacher S, Yakushenko A, Bensaid O, Willbold S, Beltramo G, Möller S, Hartmann H, Neumann E, Mussler G, Shkurmanov A, Mayer D, Wolfrum B, Offenhäusser A. Correction: Tantalum( v) 1,3-propanediolate β-diketonate solution as a precursor to sol–gel derived, metal oxide thin films. RSC Adv 2020; 10:32102. [PMID: 35518138 PMCID: PMC9056645 DOI: 10.1039/d0ra90092c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 08/24/2020] [Indexed: 12/04/2022] Open
Abstract
Correction for ‘Tantalum(v) 1,3-propanediolate β-diketonate solution as a precursor to sol–gel derived, metal oxide thin films’ by Christopher Beale et al., RSC Adv., 2020, 10, 13737–13748, DOI: 10.1039/D0RA02558E.
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Affiliation(s)
- Christopher Beale
- IBI-3, Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
- RWTH Aachen University
- Germany
| | - Stefanie Hamacher
- IBI-3, Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
- RWTH Aachen University
- Germany
| | - Alexey Yakushenko
- Fraunhofer Research Institute for Microsystems and Solid State Techologies
- D-80686 Munich
- Germany
| | - Oumaima Bensaid
- IBI-3, Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
- RWTH Aachen University
- Germany
| | | | | | - Sören Möller
- IEK-1, Materials Synthesis and Processing
- Forschungszentrum Jülich GmbH
- Germany
| | | | - Elmar Neumann
- Helmholtz Nano Facility
- Forschungszentrum Jülich GmbH
- Germany
| | - Gregor Mussler
- PGI-9, Semiconductor Nanoelectronics
- Forschungszentrum Jülich GmbH
- Germany
| | | | - Dirk Mayer
- IBI-3, Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
| | - Bernhard Wolfrum
- IBI-3, Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
- Neuroelectronics
- Munich School of Bioengineering
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Beale C, Hamacher S, Yakushenko A, Bensaid O, Willbold S, Beltramo G, Möller S, Hartmann H, Neumann E, Mussler G, Shkurmanov A, Mayer D, Wolfrum B, Offenhäusser A. Tantalum(v) 1,3-propanediolate β-diketonate solution as a precursor to sol–gel derived, metal oxide thin films. RSC Adv 2020; 10:13737-13748. [PMID: 35492970 PMCID: PMC9051532 DOI: 10.1039/d0ra02558e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 08/28/2020] [Accepted: 03/25/2020] [Indexed: 11/25/2022] Open
Abstract
Tantalum oxide is ubiquitous in everyday life, from capacitors in electronics to ion conductors for electrochromic windows and electrochemical storage devices. Investigations into sol–gel deposition of tantalum oxide, and its sister niobium oxide, has accelerated since the 1980s and continues to this day. The aim of this study is to synthesize a near UV sensitive, air stable, and low toxicity tantalum sol–gel precursor solution for metal oxide thin films – these attributes promise to reduce manufacturing costs and allow for facile mass production. By utilizing 1D and 2D nuclear magnetic resonance, this study shows that by removing ethanol from the precursor solution at a relatively low temperature and pressure, decomposition of the photosensitive complex can be minimized while obtaining a precursor solution with sufficient stability for storage and processing in the atmosphere. The solution described herein is further modified for inkjet printing, where multiple material characterization techniques demonstrate that the solution can be utilized in low temperature, photochemical solution deposition of tantalum oxide, which is likely amorphous. Tested substrates include amorphous silica, crystalline silicon wafer, and gold/titanium/PET foil. The hope is that these results may spark future investigations into electronic, optical, and biomedical device fabrication with tantalum oxide, and potentially niobium oxide, based films using the proposed synthesis method. Synthesis of tantalum(v) 1,3-propanediolate β-diketonate solution and use in photochemical solution deposition to form tantalum oxide films.![]()
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Affiliation(s)
- Christopher Beale
- IBI-3
- Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
- RWTH Aachen University
| | - Stefanie Hamacher
- IBI-3
- Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
- RWTH Aachen University
| | - Alexey Yakushenko
- Fraunhofer Research Institute for Microsystems and Solid State Techologies
- D-80686 Munich
- Germany
| | - Oumaima Bensaid
- IBI-3
- Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
- RWTH Aachen University
| | | | | | - Sören Möller
- IEK-1
- Materials Synthesis and Processing
- Forschungszentrum Jülich GmbH
- Germany
| | | | - Elmar Neumann
- Helmholtz Nano Facility
- Forschungszentrum Jülich GmbH
- Germany
| | - Gregor Mussler
- PGI-9
- Semiconductor Nanoelectronics
- Forschungszentrum Jülich GmbH
- Germany
| | | | - Dirk Mayer
- IBI-3
- Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
| | - Bernhard Wolfrum
- IBI-3
- Bioelectronics
- Forschungszentrum Jülich GmbH
- Germany
- Neuroelectronics
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Hondrich TJJ, Lenyk B, Shokoohimehr P, Kireev D, Maybeck V, Mayer D, Offenhäusser A. MEA Recordings and Cell-Substrate Investigations with Plasmonic and Transparent, Tunable Holey Gold. ACS Appl Mater Interfaces 2019; 11:46451-46461. [PMID: 31752486 DOI: 10.1021/acsami.9b14948] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 06/10/2023]
Abstract
Microelectrode arrays are widely used in different fields such as neurobiology or biomedicine to read out electrical signals from cells or biomolecules. One way to improve microelectrode applications is the development of novel electrode materials with enhanced or additional functionality. In this study, we fabricated macroelectrodes and microelectrode arrays containing gold penetrated by nanohole arrays as a conductive layer. We used this holey gold to optically excite surface plasmon polaritons, which lead to a strong increase in transparency, an effect that is further enhanced by the plasmon's interaction with cell culture medium. By varying the nanohole diameter in finite-difference time domain simulations, we demonstrate that the transmission can be increased to above 70% with its peak at a wavelength depending on the holey gold's lattice constant. Further, we demonstrate that the novel transparent microelectrode arrays are as suitable for recording cellular electrical activity as standard devices. Moreover, we prove using spectral measurements and finite-difference time domain simulations that plasmonically induced transmission peaks of holey gold red-shift upon sensing medium or cells in close vicinity (<30 nm) to the substrate. Thus, we establish plasmonic and transparent holey gold as a tunable material suitable for cellular electrical recordings and biosensing applications.
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Affiliation(s)
- Timm J J Hondrich
- Institute of Complex Systems, Bioelectronics (ICS-8) , Forschungszentrum Jülich , 52428 Jülich , Germany
- RWTH Aachen University , Aachen 52062 , Germany
| | - Bohdan Lenyk
- Institute of Complex Systems, Bioelectronics (ICS-8) , Forschungszentrum Jülich , 52428 Jülich , Germany
- Department of Physics , University of Konstanz , 78464 Konstanz , Germany
| | - Pegah Shokoohimehr
- Institute of Complex Systems, Bioelectronics (ICS-8) , Forschungszentrum Jülich , 52428 Jülich , Germany
- RWTH Aachen University , Aachen 52062 , Germany
| | - Dmitry Kireev
- Institute of Complex Systems, Bioelectronics (ICS-8) , Forschungszentrum Jülich , 52428 Jülich , Germany
- Department of Electrical and Computer Engineering , University of Texas at Austin , Austin , Texas 78712 , United States
| | - Vanessa Maybeck
- Institute of Complex Systems, Bioelectronics (ICS-8) , Forschungszentrum Jülich , 52428 Jülich , Germany
| | - Dirk Mayer
- Institute of Complex Systems, Bioelectronics (ICS-8) , Forschungszentrum Jülich , 52428 Jülich , Germany
| | - Andreas Offenhäusser
- Institute of Complex Systems, Bioelectronics (ICS-8) , Forschungszentrum Jülich , 52428 Jülich , Germany
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Zhang Y, Figueroa-Miranda G, Zafiu C, Willbold D, Offenhäusser A, Mayer D. Amperometric Aptasensor for Amyloid-β Oligomer Detection by Optimized Stem-Loop Structures with an Adjustable Detection Range. ACS Sens 2019; 4:3042-3050. [PMID: 31674772 DOI: 10.1021/acssensors.9b01630] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [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: 11/30/2022]
Abstract
Amyloid-β oligomers (AβO) have become representative biomarkers for early diagnosis of Alzheimer's disease. Here, we report on an aptasensor based on stem-loop probes for sensitive and specific detection of AβO by an amperometric transducer principle using alternating current voltammetry (ACV). Stem-loop probes with redox-active moieties are immobilized on a gold substrate as a receptor element. The signal transduction mechanism relies on redox ferrocene (Fc) reporting via charge transfer on a molecular recognition event involving a conformational change of the molecular beacon. The stem-loop structures were optimized by considering the aptamers' stem length, spacer, and different ferrocene terminals. In addition, the sensor assembly and signal recording including aptamer concentration and ACV frequency dependence are discussed. Using the optimized stem-loop probe (B-3' Fc), the aptasensor showed a decrease of the Fc peak current induced by AβO binding within the broad concentration range spanning 6 orders of magnitude. Furthermore, the detection limit of the sensor can be further decreased by optimizing the ACV frequency, however at the cost of a narrowed detection range. In this work, a label-free electrochemical aptasensor is demonstrated, which facilitates the quantification of the concentration of AβO with high selectivity and subpicomolar sensitivity, which may be conducive to improving the diagnosis and pharmacology studies of Alzheimer's disease.
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Affiliation(s)
- Yuting Zhang
- Faculty I, RWTH Aachen, 52062 Aachen, North Rhine-Westphalia, Germany
| | | | | | - Dieter Willbold
- Institut für Physikalische Biologie, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, North Rhine-Westphalia, Germany
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Hondrich TJJ, Deußen O, Grannemann C, Brinkmann D, Offenhäusser A. Improvements of Microcontact Printing for Micropatterned Cell Growth by Contrast Enhancement. Micromachines (Basel) 2019; 10:E659. [PMID: 31574944 PMCID: PMC6848919 DOI: 10.3390/mi10100659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 09/23/2019] [Accepted: 09/25/2019] [Indexed: 12/26/2022]
Abstract
Patterned neuronal cell cultures are important tools for investigating neuronal signal integration, network function, and cell-substrate interactions. Because of the variable nature of neuronal cells, the widely used coating method of microcontact printing is in constant need of improvements and adaptations depending on the pattern, cell type, and coating solutions available for a certain experimental system. In this work, we report on three approaches to modify microcontact printing on borosilicate glass surfaces, which we evaluate with contact angle measurements and by determining the quality of patterned neuronal growth. Although background toxification with manganese salt does not result in the desired pattern enhancement, a simple heat treatment of the glass substrates leads to improved background hydrophobicity and therefore neuronal patterning. Thirdly, we extended a microcontact printing process based on covalently linking the glass surface and the coating molecule via an epoxysilane. This extension is an additional hydrophobization step with dodecylamine. We demonstrate that shelf life of the silanized glass is at least 22 weeks, leading to consistently reliable neuronal patterning by microcontact printing. Thus, we compared three practical additions to microcontact printing, two of which can easily be implemented into a workflow for the investigation of patterned neuronal networks.
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Affiliation(s)
- Timm J J Hondrich
- Institute of Complex Systems, Bioelectronics (ICS-8), Forschungszentrum Jülich, 52428 Jülich, Germany.
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52076 Aachen, Germany.
| | - Oliver Deußen
- Institute of Complex Systems, Bioelectronics (ICS-8), Forschungszentrum Jülich, 52428 Jülich, Germany.
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52076 Aachen, Germany.
| | - Caroline Grannemann
- Institute of Complex Systems, Bioelectronics (ICS-8), Forschungszentrum Jülich, 52428 Jülich, Germany.
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52076 Aachen, Germany.
| | - Dominik Brinkmann
- Institute of Complex Systems, Bioelectronics (ICS-8), Forschungszentrum Jülich, 52428 Jülich, Germany.
- Faculty of Mathematics, Computer Science and Natural Sciences, RWTH Aachen University, 52076 Aachen, Germany.
| | - Andreas Offenhäusser
- Institute of Complex Systems, Bioelectronics (ICS-8), Forschungszentrum Jülich, 52428 Jülich, Germany.
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Tran DP, Winter M, Yang CT, Stockmann R, Offenhäusser A, Thierry B. Silicon Nanowires Field Effect Transistors: A Comparative Sensing Performance between Electrical Impedance and Potentiometric Measurement Paradigms. Anal Chem 2019; 91:12568-12573. [PMID: 31483135 DOI: 10.1021/acs.analchem.9b03559] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Potentiometric sensors based on silicon nanowire field effect transistors (SiNW FETs) typically display exquisite sensitivities, but their bioanalytical implementation is limited due to the need for stringent measurement conditions and high-precision readout units. An alternative operation principle where SiNW FETs are operated in a frequency-domain electrical impedimetric approach is promising. However, to date only limited data is available in regard to the sensing performance and translational relevance of this novel approach in comparison to the standard charge detection paradigm. We demonstrate the feasibility of conducting electrical impedimetric FET measurements with a portable unit for the ultrasensitive detection of cancer biomarkers in biospecimens. Compared to standard potentiometric measurements, electrical impedimetric FET measurements yielded significant improvements in biosensing performances, including the limit of detection, sensing resolution, and dynamic range.
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Affiliation(s)
- Duy P Tran
- Future Industries Institute and ARC Centre of Excellence for Convergent Bio-Nano Science and Technology , University of South Australia , Mawson Lakes , South Australia 5095 , Australia
| | - Marnie Winter
- Future Industries Institute and ARC Centre of Excellence for Convergent Bio-Nano Science and Technology , University of South Australia , Mawson Lakes , South Australia 5095 , Australia
| | - Chih-Tsung Yang
- Future Industries Institute and ARC Centre of Excellence for Convergent Bio-Nano Science and Technology , University of South Australia , Mawson Lakes , South Australia 5095 , Australia
| | - Regina Stockmann
- Institute of Complex Systems Bioelectronics , Forschungszentrum Jülich , 52425 , Jülich , Germany
| | - Andreas Offenhäusser
- Institute of Complex Systems Bioelectronics , Forschungszentrum Jülich , 52425 , Jülich , Germany
| | - Benjamin Thierry
- Future Industries Institute and ARC Centre of Excellence for Convergent Bio-Nano Science and Technology , University of South Australia , Mawson Lakes , South Australia 5095 , Australia
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Liang Y, Wu C, Figueroa-Miranda G, Offenhäusser A, Mayer D. Amplification of aptamer sensor signals by four orders of magnitude via interdigitated organic electrochemical transistors. Biosens Bioelectron 2019; 144:111668. [PMID: 31522101 DOI: 10.1016/j.bios.2019.111668] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/13/2019] [Accepted: 08/29/2019] [Indexed: 12/01/2022]
Abstract
Electrochemical aptamer receptor/transducer systems are key elements of emerging E-AB sensors (aptasensor) used for the detection of various kinds of targets. However, the performance of these amperometric sensors is often limited by the low density of receptors attached to the sensor surface and high background signals. In the present work, interdigitated organic electrochemical transistors (iOECT) were used as a transducer to enhance the sensitivity and dynamic detection range of aptasensors. Therefore, the electrode of an amperometric sensor was utilized as gate electrode to operate the iOECT. This device was used to detect the low weight target molecule adenosine triphosphate (ATP), a common biomarker, which plays an important role for cardiovascular, neurodegenerative, and immune deficiency diseases. The novel aptasensor can selectively detect ATP with ultrahigh sensitivity down to the concentration of 10 pM, which is four orders of magnitude lower than the detection limit of the same aptasensor using an amperometric transducer principle (limit-of-detection of 106 nM) and most other previously reported electrochemical sensors. Furthermore, sensor regeneration was demonstrated, which facilitates reusability of OECT aptasensors. The small device size in combination with high transconductances paves the way for the development of highly sensitive integrated micro-biosensors for point-of-care applications.
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Affiliation(s)
- Yuanying Liang
- Institute of Complex Systems, Bioelectronics (ICS-8) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Changtong Wu
- Institute of Complex Systems, Bioelectronics (ICS-8) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Gabriela Figueroa-Miranda
- Institute of Complex Systems, Bioelectronics (ICS-8) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Andreas Offenhäusser
- Institute of Complex Systems, Bioelectronics (ICS-8) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Dirk Mayer
- Institute of Complex Systems, Bioelectronics (ICS-8) and JARA-Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425, Jülich, Germany.
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Huang X, Dong H, Tao Q, Yu M, Li Y, Rong L, Krause HJ, Offenhäusser A, Xie X. Sensor Configuration and Algorithms for Power-Line Interference Suppression in Low Field Nuclear Magnetic Resonance. Sensors (Basel) 2019; 19:E3566. [PMID: 31443310 PMCID: PMC6721142 DOI: 10.3390/s19163566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 08/12/2019] [Accepted: 08/14/2019] [Indexed: 11/16/2022]
Abstract
Low field (LF) nuclear magnetic resonance (NMR) shows potential advantages to study pure heteronuclear J-coupling and observe the fine structure of matter. Power-line harmonics interferences and fixed-frequency noise peaks might introduce discrete noise peaks into the LF-NMR spectrum in an open environment or in a conductively shielded room, which might disturb J-coupling spectra of matter recorded at LF. In this paper, we describe a multi-channel sensor configuration of superconducting quantum interference devices, and measure the multiple peaks of the 2,2,2-trifluoroethanol J-coupling spectrum. For the case of low signal to noise ratio (SNR) < 1, we suggest two noise suppression algorithms using discrete wavelet analysis (DWA), combined with either least squares method (LSM) or gradient descent (GD). The de-noising methods are based on spatial correlation of the interferences among the superconducting sensors, and are experimentally demonstrated. The DWA-LSM algorithm shows a significant effect in the noise reduction and recovers SNR > 1 for most of the signal peaks. The DWA-GD algorithm improves the SNR further, but takes more computational time. Depending on whether the accuracy or the speed of the de-noising process is more important in LF-NMR applications, the choice of algorithm should be made.
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Affiliation(s)
- Xiaolei Huang
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), Shanghai 200050, China
- CAS Center for ExcelleNce in Superconducting Electronics (CENSE), Shanghai 200050, China
- Institute of Complex System (ICS-8), Forschungszentrum Jülich (FZJ), D-52425 Jülich, Germany
- Joint Research Institute on Functional Materials and Electronics, Collaboration between SIMIT and FZJ, D-52425 Jülich, Germany
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hui Dong
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), Shanghai 200050, China.
- CAS Center for ExcelleNce in Superconducting Electronics (CENSE), Shanghai 200050, China.
- Joint Research Institute on Functional Materials and Electronics, Collaboration between SIMIT and FZJ, D-52425 Jülich, Germany.
| | - Quan Tao
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), Shanghai 200050, China
- CAS Center for ExcelleNce in Superconducting Electronics (CENSE), Shanghai 200050, China
- Joint Research Institute on Functional Materials and Electronics, Collaboration between SIMIT and FZJ, D-52425 Jülich, Germany
| | - Mengmeng Yu
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), Shanghai 200050, China
- CAS Center for ExcelleNce in Superconducting Electronics (CENSE), Shanghai 200050, China
- Joint Research Institute on Functional Materials and Electronics, Collaboration between SIMIT and FZJ, D-52425 Jülich, Germany
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yongqiang Li
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), Shanghai 200050, China
- CAS Center for ExcelleNce in Superconducting Electronics (CENSE), Shanghai 200050, China
- Joint Research Institute on Functional Materials and Electronics, Collaboration between SIMIT and FZJ, D-52425 Jülich, Germany
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Liangliang Rong
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), Shanghai 200050, China
- CAS Center for ExcelleNce in Superconducting Electronics (CENSE), Shanghai 200050, China
- Joint Research Institute on Functional Materials and Electronics, Collaboration between SIMIT and FZJ, D-52425 Jülich, Germany
| | - Hans-Joachim Krause
- Institute of Complex System (ICS-8), Forschungszentrum Jülich (FZJ), D-52425 Jülich, Germany. h.-
- Joint Research Institute on Functional Materials and Electronics, Collaboration between SIMIT and FZJ, D-52425 Jülich, Germany. h.-
| | - Andreas Offenhäusser
- Institute of Complex System (ICS-8), Forschungszentrum Jülich (FZJ), D-52425 Jülich, Germany
- Joint Research Institute on Functional Materials and Electronics, Collaboration between SIMIT and FZJ, D-52425 Jülich, Germany
| | - Xiaoming Xie
- State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences (CAS), Shanghai 200050, China
- CAS Center for ExcelleNce in Superconducting Electronics (CENSE), Shanghai 200050, China
- Joint Research Institute on Functional Materials and Electronics, Collaboration between SIMIT and FZJ, D-52425 Jülich, Germany
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Svetlova A, Ellieroth J, Milos F, Maybeck V, Offenhäusser A. Composite Lipid Bilayers from Cell Membrane Extracts and Artificial Mixes as a Cell Culture Platform. Langmuir 2019; 35:8076-8084. [PMID: 31055920 DOI: 10.1021/acs.langmuir.9b00763] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
An artificial lipid bilayer is the closest possible model for the cell membrane. Despite that, current methods of lipid bilayer assembly and functionalization do not provide a satisfactory mimic of the cell-cell contact due to the inability to recreate an asymmetrical multicomponent system. In the current work, a method to produce an integrated solid-supported lipid bilayer combining natural extracts from cell membranes and artificially made lipid vesicles is proposed. This simple method allows delivery of transmembrane proteins and components of the extracellular matrix into the substrate. Biocompatibility of the composite natural/artificial lipid bilayers is evaluated by their interactions with the cardiomyocyte-like HL-1 cell line. Compared with fully artificial mixes, composite lipid bilayers allow cells to adhere and develop a morphologically more normal cytoskeleton.
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Affiliation(s)
- Anastasia Svetlova
- Institute of Bioelectronics (ICS-8), Forschungszentrum Jülich GmbH , Wilhelm-Johnen Straße , 52425 Jülich , Germany
| | - Jana Ellieroth
- Institute of Bioelectronics (ICS-8), Forschungszentrum Jülich GmbH , Wilhelm-Johnen Straße , 52425 Jülich , Germany
| | - Frano Milos
- Institute of Bioelectronics (ICS-8), Forschungszentrum Jülich GmbH , Wilhelm-Johnen Straße , 52425 Jülich , Germany
| | - Vanessa Maybeck
- Institute of Bioelectronics (ICS-8), Forschungszentrum Jülich GmbH , Wilhelm-Johnen Straße , 52425 Jülich , Germany
| | - Andreas Offenhäusser
- Institute of Bioelectronics (ICS-8), Forschungszentrum Jülich GmbH , Wilhelm-Johnen Straße , 52425 Jülich , Germany
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Achtsnicht S, Pourshahidi AM, Offenhäusser A, Krause HJ. Multiplex Detection of Different Magnetic Beads Using Frequency Scanning in Magnetic Frequency Mixing Technique. Sensors (Basel) 2019; 19:s19112599. [PMID: 31181672 PMCID: PMC6603599 DOI: 10.3390/s19112599] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 05/29/2019] [Accepted: 06/05/2019] [Indexed: 02/07/2023]
Abstract
In modern bioanalytical methods, it is often desired to detect several targets in one sample within one measurement. Immunological methods including those that use superparamagnetic beads are an important group of techniques for these applications. The goal of this work is to investigate the feasibility of simultaneously detecting different superparamagnetic beads acting as markers using the magnetic frequency mixing technique. The frequency of the magnetic excitation field is scanned while the lower driving frequency is kept constant. Due to the particles’ nonlinear magnetization, mixing frequencies are generated. To record their amplitude and phase information, a direct digitization of the pickup-coil’s signal with subsequent Fast Fourier Transformation is performed. By synchronizing both magnetic fields, a stable phase information is gained. In this research, it is shown that the amplitude of the dominant mixing component is proportional to the amount of superparamagnetic beads inside a sample. Additionally, it is shown that the phase does not show this behaviour. Excitation frequency scans of different bead types were performed, showing different phases, without correlation to their diverse amplitudes. Two commercially available beads were selected and a determination of their amount in a mixture is performed as a demonstration for multiplex measurements.
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Affiliation(s)
- Stefan Achtsnicht
- Institute of Complex Systems Bioelectronics (ICS-8), Forschungszentrum Jülich, 52425 Jülich, Germany.
- RWTH Aachen University, 52062 Aachen, Germany.
| | - Ali Mohammad Pourshahidi
- Institute of Complex Systems Bioelectronics (ICS-8), Forschungszentrum Jülich, 52425 Jülich, Germany.
- RWTH Aachen University, 52062 Aachen, Germany.
| | - Andreas Offenhäusser
- Institute of Complex Systems Bioelectronics (ICS-8), Forschungszentrum Jülich, 52425 Jülich, Germany.
- RWTH Aachen University, 52062 Aachen, Germany.
| | - Hans-Joachim Krause
- Institute of Complex Systems Bioelectronics (ICS-8), Forschungszentrum Jülich, 52425 Jülich, Germany. h.-
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