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Uguz I, Ohayon D, Yilmaz S, Griggs S, Sheelamanthula R, Fabbri JD, McCulloch I, Inal S, Shepard KL. Complementary integration of organic electrochemical transistors for front-end amplifier circuits of flexible neural implants. Sci Adv 2024; 10:eadi9710. [PMID: 38517957 PMCID: PMC10959418 DOI: 10.1126/sciadv.adi9710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 02/14/2024] [Indexed: 03/24/2024]
Abstract
The ability to amplify, translate, and process small ionic potential fluctuations of neural processes directly at the recording site is essential to improve the performance of neural implants. Organic front-end analog electronics are ideal for this application, allowing for minimally invasive amplifiers owing to their tissue-like mechanical properties. Here, we demonstrate fully organic complementary circuits by pairing depletion- and enhancement-mode p- and n-type organic electrochemical transistors (OECTs). With precise geometry tuning and a vertical device architecture, we achieve overlapping output characteristics and integrate them into amplifiers with single neuronal dimensions (20 micrometers). Amplifiers with combined p- and n-OECTs result in voltage-to-voltage amplification with a gain of >30 decibels. We also leverage depletion and enhancement-mode p-OECTs with matching characteristics to demonstrate a differential recording capability with high common mode rejection rate (>60 decibels). Integrating OECT-based front-end amplifiers into a flexible shank form factor enables single-neuron recording in the mouse cortex with on-site filtering and amplification.
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Affiliation(s)
- Ilke Uguz
- Columbia University, New York, NY, USA
| | - David Ohayon
- Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- Institute of Functional Intelligent Materials (IFIM), National University of Singapore, 117544, Singapore
| | | | - Sophie Griggs
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
| | - Rajendar Sheelamanthula
- Physical Science and Engineering Division, KAUST Solar Center, KAUST, Thuwal 23955-6900, Saudi Arabia
| | | | - Iain McCulloch
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
- Physical Science and Engineering Division, KAUST Solar Center, KAUST, Thuwal 23955-6900, Saudi Arabia
| | - Sahika Inal
- Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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2
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Verardo C, Mele LJ, Selmi L, Palestri P. Finite-element modeling of neuromodulation via controlled delivery of potassium ions using conductive polymer-coated microelectrodes. J Neural Eng 2024; 21:026002. [PMID: 38306702 DOI: 10.1088/1741-2552/ad2581] [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: 04/25/2023] [Accepted: 02/02/2024] [Indexed: 02/04/2024]
Abstract
Objective. The controlled delivery of potassium is an interesting neuromodulation modality, being potassium ions involved in shaping neuron excitability, synaptic transmission, network synchronization, and playing a key role in pathological conditions like epilepsy and spreading depression. Despite many successful examples of pre-clinical devices able to influence the extracellular potassium concentration, computational frameworks capturing the corresponding impact on neuronal activity are still missing.Approach. We present a finite-element model describing a PEDOT:PSS-coated microelectrode (herein, simplyionic actuator) able to release potassium and thus modulate the activity of a cortical neuron in anin-vitro-like setting. The dynamics of ions in the ionic actuator, the neural membrane, and the cellular fluids are solved self-consistently.Main results. We showcase the capability of the model to describe on a physical basis the modulation of the intrinsic excitability of the cell and of the synaptic transmission following the electro-ionic stimulation produced by the actuator. We consider three case studies for the ionic actuator with different levels of selectivity to potassium: ideal selectivity, no selectivity, and selectivity achieved by embedding ionophores in the polymer.Significance. This work is the first step toward a comprehensive computational framework aimed to investigate novel neuromodulation devices targeting specific ionic species, as well as to optimize their design and performance, in terms of the induced modulation of neural activity.
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Affiliation(s)
- Claudio Verardo
- Polytechnic Department of Engineering and Architecture, Università degli Studi di Udine, Udine, Italy
- BioRobotics Institute and Department of Excellence in Robotics and AI, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Leandro Julian Mele
- Polytechnic Department of Engineering and Architecture, Università degli Studi di Udine, Udine, Italy
- Department of Materials Science and Engineering, Stanford University, Stanford, CA, United States of America
| | - Luca Selmi
- Department of Engineering "Enzo Ferrari", Università degli Studi di Modena e Reggio Emilia, Modena, Italy
| | - Pierpaolo Palestri
- Polytechnic Department of Engineering and Architecture, Università degli Studi di Udine, Udine, Italy
- Department of Engineering "Enzo Ferrari", Università degli Studi di Modena e Reggio Emilia, Modena, Italy
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3
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Sha B, Du Z. Neural repair and regeneration interfaces: a comprehensive review. Biomed Mater 2024; 19:022002. [PMID: 38232383 DOI: 10.1088/1748-605x/ad1f78] [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: 05/31/2023] [Accepted: 01/17/2024] [Indexed: 01/19/2024]
Abstract
Neural interfaces play a pivotal role in neuromodulation, as they enable precise intervention into aberrant neural activity and facilitate recovery from neural injuries and resultant functional impairments by modulating local immune responses and neural circuits. This review outlines the development and applications of these interfaces and highlights the advantages of employing neural interfaces for neural stimulation and repair, including accurate targeting of specific neural populations, real-time monitoring and control of neural activity, reduced invasiveness, and personalized treatment strategies. Ongoing research aims to enhance the biocompatibility, stability, and functionality of these interfaces, ultimately augmenting their therapeutic potential for various neurological disorders. The review focuses on electrophysiological and optophysiology neural interfaces, discussing functionalization and power supply approaches. By summarizing the techniques, materials, and methods employed in this field, this review aims to provide a comprehensive understanding of the potential applications and future directions for neural repair and regeneration devices.
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Affiliation(s)
- Baoning Sha
- Brain Cognition and Brain Disease Institute, CAS Key Laboratory of Brain Connectome and Manipulation, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, Shenzhen institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China
- Shenzhen-Hong Kong Institute of Brain Science, Shenzhen Fundamental Research Institutions, Shenzhen, People's Republic of China
- Department of Biomedical Engineering, Columbia University, New York, NY, United States of America
| | - Zhanhong Du
- Brain Cognition and Brain Disease Institute, CAS Key Laboratory of Brain Connectome and Manipulation, Guangdong Provincial Key Laboratory of Brain Connectome and Behavior, Shenzhen institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China
- Shenzhen-Hong Kong Institute of Brain Science, Shenzhen Fundamental Research Institutions, Shenzhen, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, People's Republic of China
- Faculty of Life and Health Sciences, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China
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4
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Uguz I, Ohayon D, Arslan V, Sheelamanthula R, Griggs S, Hama A, Stanton JW, McCulloch I, Inal S, Shepard KL. Flexible switch matrix addressable electrode arrays with organic electrochemical transistor and pn diode technology. Nat Commun 2024; 15:533. [PMID: 38225257 PMCID: PMC10789794 DOI: 10.1038/s41467-023-44024-1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 11/28/2023] [Indexed: 01/17/2024] Open
Abstract
Due to their effective ionic-to-electronic signal conversion and mechanical flexibility, organic neural implants hold considerable promise for biocompatible neural interfaces. Current approaches are, however, primarily limited to passive electrodes due to a lack of circuit components to realize complex active circuits at the front-end. Here, we introduce a p-n organic electrochemical diode using complementary p- and n-type conducting polymer films embedded in a 15-μm -diameter vertical stack. Leveraging the efficient motion of encapsulated cations inside this polymer stack and the opposite doping mechanisms of the constituent polymers, we demonstrate high current rectification ratios ([Formula: see text]) and fast switching speeds (230 μs). We integrate p-n organic electrochemical diodes with organic electrochemical transistors in the front-end pixel of a recording array. This configuration facilitates the access of organic electrochemical transistor output currents within a large network operating in the same electrolyte, while minimizing crosstalk from neighboring elements due to minimized reverse-biased leakage. Furthermore, we use these devices to fabricate time-division-multiplexed amplifier arrays. Lastly, we show that, when fabricated in a shank format, this technology enables the multiplexing of amplified local field potentials directly in the active recording pixel (26-μm diameter) in a minimally invasive form factor with shank cross-sectional dimensions of only 50×8 [Formula: see text].
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Affiliation(s)
- Ilke Uguz
- Electrical Engineering Department, Columbia University, New York, 10027, NY, USA.
| | - David Ohayon
- Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Volkan Arslan
- Electrical Engineering Department, Columbia University, New York, 10027, NY, USA
| | | | - Sophie Griggs
- Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK
| | - Adel Hama
- Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - John William Stanton
- Electrical Engineering Department, Columbia University, New York, 10027, NY, USA
| | - Iain McCulloch
- Physical Science and Engineering Division, KAUST, Thuwal, 23955-6900, Saudi Arabia
- Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK
| | - Sahika Inal
- Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Kenneth L Shepard
- Electrical Engineering Department, Columbia University, New York, 10027, NY, USA
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5
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Rauhala OJ, Ma L, Wisniewski DJ, Shao S, Schumacher B, Lopez JF, Kaspers M, Zhao Z, Gelinas JN, Khodagholy D. E-Suture: Mixed-Conducting Suture for Medical Devices. Adv Healthc Mater 2023:e2302613. [PMID: 38150402 DOI: 10.1002/adhm.202302613] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 12/17/2023] [Indexed: 12/29/2023]
Abstract
Modern implantable bioelectronics demand soft, biocompatible components that make robust, low-impedance connections with the body and circuit elements. Concurrently, such technologies must demonstrate high efficiency, with the ability to interface between the body's ionic and external electronic charge carriers. Here, a mixed-conducting suture, the e-suture, is presented. Composed of silk, the conducting polymer poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), and insulating jacketing polymers,the resulting e-suture has mixed-conducting properties at the interface with biological tissue as well as effective insulation along its length. The e-suture can be mechanically integrated into electronics, enabling the acquisition of biopotentials such as electrocardiograms, electromyograms, and local field potentials (LFP). Chronic, in vivo acquisition of LFP with e-sutures remains stable for months with robust brain activity patterns. Furthermore, e-sutures can establish electrophoretic-based local drug delivery, potentially offering enhanced anatomical targeting and decreased side effects associated with systemic administration, while maintaining an electrically conducting interface for biopotential monitoring. E-sutures expand on the conventional role of sutures and wires by providing a soft, biocompatible, and mechanically sound structure that additionally has multifunctional capacity for sensing, stimulation, and drug delivery.
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Affiliation(s)
- Onni J Rauhala
- Department of Electrical Engineering, Columbia University, New York, 10027, USA
| | - Liang Ma
- Department of Biomedical Engineering, Columbia University, New York, 10027, USA
| | - Duncan J Wisniewski
- Department of Electrical Engineering, Columbia University, New York, 10027, USA
| | - Shan Shao
- Department of Neurology, Columbia University Irving Medical Center, New York, 10032, USA
| | - Brandon Schumacher
- Department of Neurology, Columbia University Irving Medical Center, New York, 10032, USA
| | - Jose Ferrero Lopez
- Department of Neurology, Columbia University Irving Medical Center, New York, 10032, USA
| | - Mara Kaspers
- Department of Biomedical Engineering, Columbia University, New York, 10027, USA
| | - Zifang Zhao
- Department of Electrical Engineering, Columbia University, New York, 10027, USA
| | - Jennifer N Gelinas
- Department of Biomedical Engineering, Columbia University, New York, 10027, USA
- Department of Neurology, Columbia University Irving Medical Center, New York, 10032, USA
| | - Dion Khodagholy
- Department of Electrical Engineering, Columbia University, New York, 10027, USA
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6
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Wang Z, Lin H, Zhang M, Yu W, Zhu C, Wang P, Huang Y, Lv F, Bai H, Wang S. Water-soluble conjugated polymers for bioelectronic systems. Mater Horiz 2023; 10:1210-1233. [PMID: 36752220 DOI: 10.1039/d2mh01520j] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Bioelectronics is an interdisciplinary field of research that aims to establish a synergy between electronics and biology. Contributing to a deeper understanding of bioelectronic processes and the built bioelectronic systems, a variety of new phenomena, mechanisms and concepts have been derived in the field of biology, medicine, energy, artificial intelligence science, etc. Organic semiconductors can promote the applications of bioelectronics in improving original performance and creating new features for organisms due to their excellent photoelectric and electrical properties. Recently, water-soluble conjugated polymers (WSCPs) have been employed as a class of ideal interface materials to regulate bioelectronic processes between biological systems and electronic systems, relying on their satisfying ionic conductivity, water-solubility, good biocompatibility and the additional mechanical and electrical properties. In this review, we summarize the prominent contributions of WSCPs in the aspect of the regulation of bioelectronic processes and highlight the latest advances in WSCPs for bioelectronic applications, involving biosynthetic systems, photosynthetic systems, biophotovoltaic systems, and bioelectronic devices. The challenges and outlooks of WSCPs in designing high-performance bioelectronic systems are also discussed.
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Affiliation(s)
- Zenghao Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
- College of Chemistry, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Hongrui Lin
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
- College of Chemistry, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Miaomiao Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - Wen Yu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
- College of Chemistry, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chuanwei Zhu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
- College of Chemistry, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Pengcheng Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - Yiming Huang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - Fengting Lv
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - Haotian Bai
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
- College of Chemistry, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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7
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Fenoy GE, Hasler R, Quartinello F, Marmisollé WA, Lorenz C, Azzaroni O, Bäuerle P, Knoll W. "Clickable" Organic Electrochemical Transistors. JACS Au 2022; 2:2778-2790. [PMID: 36590273 PMCID: PMC9795466 DOI: 10.1021/jacsau.2c00515] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 09/19/2022] [Revised: 11/03/2022] [Accepted: 11/04/2022] [Indexed: 06/17/2023]
Abstract
Interfacing the surface of an organic semiconductor with biological elements is a central quest when it comes to the development of efficient organic bioelectronic devices. Here, we present the first example of "clickable" organic electrochemical transistors (OECTs). The synthesis and characterization of an azide-derivatized EDOT monomer (azidomethyl-EDOT, EDOT-N3) are reported, as well as its deposition on Au-interdigitated electrodes through electropolymerization to yield PEDOT-N3-OECTs. The electropolymerization protocol allows for a straightforward and reliable tuning of the characteristics of the OECTs, yielding transistors with lower threshold voltages than PEDOT-based state-of-the-art devices and maximum transconductance voltage values close to 0 V, a key feature for the development of efficient organic bioelectronic devices. Subsequently, the azide moieties are employed to click alkyne-bearing molecules such as redox probes and biorecognition elements. The clicking of an alkyne-modified PEG4-biotin allows for the use of the avidin-biotin interactions to efficiently generate bioconstructs with proteins and enzymes. In addition, a dibenzocyclooctyne-modified thrombin-specific HD22 aptamer is clicked on the PEDOT-N3-OECTs, showing the application of the devices toward the development of organic transistors-based biosensors. Finally, the clicked OECTs preserve their electronic features after the different clicking procedures, demonstrating the stability and robustness of the fabricated transistors.
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Affiliation(s)
- Gonzalo E. Fenoy
- AIT
Austrian Institute of Technology GmbH, Konrad-Lorenz Straße 24, 3430 Tulln an der Donau, Austria
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas,
Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata − CONICET, 64 and 113, 1900 La Plata, Argentina
| | - Roger Hasler
- AIT
Austrian Institute of Technology GmbH, Konrad-Lorenz Straße 24, 3430 Tulln an der Donau, Austria
| | - Felice Quartinello
- Department
of Agrobiotechnology, IFA-Tulln, Institute
of Environmental Biotechnology, Konrad-Lorenz-Straße 20, 3430 Tulln an der Donau, Austria
| | - Waldemar A. Marmisollé
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas,
Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata − CONICET, 64 and 113, 1900 La Plata, Argentina
| | - Christoph Lorenz
- Institute
for Organic Chemistry II and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Omar Azzaroni
- Instituto
de Investigaciones Fisicoquímicas Teóricas y Aplicadas,
Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata − CONICET, 64 and 113, 1900 La Plata, Argentina
| | - Peter Bäuerle
- Institute
for Organic Chemistry II and Advanced Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Wolfgang Knoll
- AIT
Austrian Institute of Technology GmbH, Konrad-Lorenz Straße 24, 3430 Tulln an der Donau, Austria
- Department
of Scientific Coordination and Management, Danube Private University, 3500 Krems, Austria
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8
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Naveen NR, Girirajasekhar D, Goudanavar PS, Kumar CB, Narasimha GL. Prospection of Microfluidics for Local Drug Delivery. Curr Drug Targets 2022; 23:1239-1251. [PMID: 35379132 DOI: 10.2174/1389450123666220404154710] [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] [Received: 08/16/2021] [Revised: 01/03/2022] [Accepted: 02/10/2022] [Indexed: 01/25/2023]
Abstract
Significant endeavors can be made to develop effective drug delivery systems. Nowadays, many of these novel systems have gained attention as they focus primarily on increasing the bioavailability and bioaccessibility of several drugs to finally minimize the side effects, thus improving the treatment's efficacy. Microfluidics systems are unquestionably a superior technology, which is currently revolutionizing the current chemical and biological studies, providing diminutive chip-scale devices that offer precise dosage, target-precise delivery, and controlled release. Microfluidic systems have emerged as a promising delivery vehicle owing to their potential for defined handling and transporting of small liquid quantities. The latest microfabrication developments have been made for application to several biological systems. Here, we review the fundamentals of microfluidics and their application for local drug delivery.
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Affiliation(s)
- Nimbagal R Naveen
- Department of Pharmaceutics, Sri Adichunchanagiri College of Pharmacy, Adichunchanagiri University, B.G. Nagar, Karnataka 571448, India
| | | | - Prakash S Goudanavar
- Department of Pharmaceutics, Sri Adichunchanagiri College of Pharmacy, Adichunchanagiri University, B.G. Nagar, Karnataka 571448, India
| | - Chagaleti B Kumar
- Department of Pharmaceutical Chemistry, Akshaya Institute of Pharmacy, Lingapura, Tumkur, Karnataka 572106, India
| | - Gunturu L Narasimha
- Department of Pharmacy Practice, Annamacharya College of Pharmacy, New Boyanapalli, Rajampet, India
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9
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Coles L, Oluwasanya PW, Karam N, Proctor CM. Fluidic enabled bioelectronic implants: opportunities and challenges. J Mater Chem B 2022; 10:7122-7131. [PMID: 35959561 PMCID: PMC9518646 DOI: 10.1039/d2tb00942k] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 07/26/2022] [Indexed: 11/21/2022]
Abstract
Bioelectronic implants are increasingly facilitating novel strategies for clinical diagnosis and treatment. The integration of fluidic technologies into such implants enables new complementary routes for sensing and therapy alongside electrical interaction. Indeed, these two technologies, electrical and fluidic, can work synergistically in a bioelectronics implant towards the fabrication of a complete therapeutic platform. In this perspective article, the leading applications of fluidic enabled bioelectronic implants are highlighted and methods of operation and material choices are discussed. Furthermore, a forward-looking perspective is offered on emerging opportunities as well as critical materials and technological challenges.
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Affiliation(s)
- Lawrence Coles
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, UK.
| | - Pelumi W Oluwasanya
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, UK.
| | - Nuzli Karam
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, UK.
| | - Christopher M Proctor
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, UK.
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10
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Abstract
Ion pumps are important membrane-spanning transporters that pump ions against the electrochemical gradient across the cell membrane. In biological systems, ion pumping is essential to maintain intracellular osmotic pressure, to respond to external stimuli, and to regulate physiological activities by consuming adenosine triphosphate. In recent decades, artificial ion pumping systems with diverse geometric structures and functions have been developing rapidly with the progress of advanced materials and nanotechnology. In this Review, bioinspired artificial ion pumps, including four categories: asymmetric structure-driven ion pumps, pH gradient-driven ion pumps, light-driven ion pumps, and electron-driven ion pumps, are summarized. The working mechanisms, functions, and applications of those artificial ion pumping systems are discussed. Finally, a brief conclusion of underpinning challenges and outlook for future research are tentatively discussed.
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Affiliation(s)
- Tingting Mei
- Department of Biomedical Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P.R. China
| | - Hongjie Zhang
- Department of Biomedical Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P.R. China
| | - Kai Xiao
- Department of Biomedical Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, P.R. China
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11
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Tavari T, Nazari M, Meamardoost S, Tamayol A, Samandari M. A systematic overview of electrode configuration in electric‐driven micropumps. Electrophoresis 2022; 43:1476-1520. [DOI: 10.1002/elps.202100317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 02/18/2022] [Accepted: 03/22/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Tannaz Tavari
- Department of Mechanical and Mechatronics Engineering Shahrood University of Technology Shahrood Iran
| | - Mohsen Nazari
- Department of Mechanical and Mechatronics Engineering Shahrood University of Technology Shahrood Iran
| | - Saber Meamardoost
- Department of Chemical and Biological Engineering University at Buffalo Buffalo New York USA
| | - Ali Tamayol
- Department of Biomedical Engineering University of Connecticut Health Center Farmington Connecticut USA
| | - Mohamadmahdi Samandari
- Department of Biomedical Engineering University of Connecticut Health Center Farmington Connecticut USA
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12
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Lin CH, Luo SC. Zwitterionic Conducting Polymers: From Molecular Design, Surface Modification, and Interfacial Phenomenon to Biomedical Applications. Langmuir 2022; 38:7383-7399. [PMID: 35675211 DOI: 10.1021/acs.langmuir.2c00448] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Conducting polymers (CPs) have gained attention as electrode materials in bioengineering mainly because of their mechanical softness compared to conventional inorganic materials. To achieve better performance and broaden bioelectronics applications, the surface modification of soft zwitterionic polymers with antifouling properties represents a facile approach to preventing unwanted nonspecific protein adsorption and improving biocompatibility. This feature article emphasizes the antifouling properties of zwitterionic CPs, accompanied by their molecular synthesis and surface modification methods and an analysis of the interfacial phenomenon. Herein, commonly used methods for zwitterionic functionalization on CPs are introduced, including the synthesis of zwitterionic moieties on CP molecules and postsurface modification, such as the grafting of zwitterionic polymer brushes. To analyze the chain conformation, the structure of bound water in the vicinity of zwitterionic CPs and biomolecule behavior, such as protein adsorption or cell adhesion, provide critical insights into the antifouling properties. Integrating these characterization techniques offers general guidelines and paves the way for designing new zwitterionic CPs for advanced biomedical applications. Recent advances in newly designed zwitterionic CP-based electrodes have demonstrated outstanding potential in modern biomedical applications.
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Affiliation(s)
- Chia-Hsuan Lin
- Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
| | - Shyh-Chyang Luo
- Department of Materials Science and Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes (NHRI), Miaoli County 35053, Taiwan
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13
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Ahmed S, Hu J, Naqvi SMZA, Zhang Y, Linze L, Iderawumi AM. Molecular communication network and its applications in crop sciences. Planta 2022; 255:128. [PMID: 35578136 DOI: 10.1007/s00425-022-03903-5] [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] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 04/21/2022] [Indexed: 06/15/2023]
Abstract
Plant molecular biology and bacterial behaviour research in the future could focus on using genetically engineered bacteria as a sensor, hormonal/disease detector, and target gene expression, as well as establishing a bioluminescence feedback communication system. Over the last two decades, understanding plant signal transduction pathways of plant hormones has become an active research field to understand plant behavior better. To accomplish signal transduction, plants use a variety of hormones for inter- and intra-communication, and biotic or abiotic stressors activate those. Signal transduction pathways refer to the use of various communication methods by effectors to elicit a response at the molecular level. Research methodologies such as inter-kingdom signaling have been introduced to study signal transduction and communication pathways, or what we can term plant molecular communication. However, stochastic qualities are inherent in most technologies used to monitor these biological processes. Molecular communication (MC) is a new research topic that uses the natural features of biological organisms to communicate and aims to manipulate their stochastic nature to achieve the desired results. MC is a multidisciplinary research field inspired by the use of molecules to store, spread, and receive information between biological organisms known as "Biological Nanomachines." It has been used to demonstrate how biological entities may be characterised, modelled, and engineered as communication devices in the same manner as traditional communication technologies are. We attempted to link MC and PLANT'S MC in this study and we believe that reasonable combined efforts may be made to use the functional applications of MC for detecting and understanding molecular-level activities such as signaling transduction pathways in crops.
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Affiliation(s)
- Shakeel Ahmed
- College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China
- Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China
| | - Jiandong Hu
- College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China.
- Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China.
| | - Syed M Z A Naqvi
- College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China
- Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China
| | - Yanyan Zhang
- College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China
- Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China
| | - Li Linze
- College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China
- Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China
| | - Abdulraheem M Iderawumi
- College of Mechanical and Electrical Engineering, Henan Agricultural University, Zhengzhou, 450002, China
- Henan International Joint Laboratory of Laser Technology in Agriculture Sciences, Zhengzhou, 450002, China
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14
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Abstract
![]()
The nervous system
poses a grand challenge for integration with
modern electronics and the subsequent advances in neurobiology, neuroprosthetics,
and therapy which would become possible upon such integration. Due
to its extreme complexity, multifaceted signaling pathways, and ∼1
kHz operating frequency, modern complementary metal oxide semiconductor
(CMOS) based electronics appear to be the only technology platform
at hand for such integration. However, conventional CMOS-based electronics
rely exclusively on electronic signaling and therefore require an
additional technology platform to translate electronic signals into
the language of neurobiology. Organic electronics are just such a
technology platform, capable of converting electronic addressing into
a variety of signals matching the endogenous signaling of the nervous
system while simultaneously possessing favorable material similarities
with nervous tissue. In this review, we introduce a variety of organic
material platforms and signaling modalities specifically designed
for this role as “translator”, focusing especially on
recent implementation in in vivo neuromodulation.
We hope that this review serves both as an informational resource
and as an encouragement and challenge to the field.
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Affiliation(s)
- Magnus Berggren
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74 Norrköping, Sweden
| | - Eric D Głowacki
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74 Norrköping, Sweden.,Bioelectronics Materials and Devices, Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00 Brno, Czech Republic
| | - Daniel T Simon
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74 Norrköping, Sweden
| | - Eleni Stavrinidou
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74 Norrköping, Sweden
| | - Klas Tybrandt
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74 Norrköping, Sweden
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15
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Bansal M, Raos B, Aqrawe Z, Wu Z, Svirskis D. An interpenetrating and patternable conducting polymer hydrogel for electrically stimulated release of glutamate. Acta Biomater 2022; 137:124-135. [PMID: 34644612 DOI: 10.1016/j.actbio.2021.10.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 09/14/2021] [Accepted: 10/06/2021] [Indexed: 12/18/2022]
Abstract
Recent advances in drug delivery have made it possible to release bioactive agents from neural implants specifically to local tissues. Conducting polymer coatings have been explored as a delivery platform in bioelectronics, however, their utility is restricted by their limited loading capacity and stability. This study presents the fabrication of a stable conducting polymer hydrogel (CPH), comprising the hydrogel gelatin methacrylate (GelMA), and conducting polymer polypyrrole (PPy) for the electrically controlled delivery of glutamate (Glu). The hybrid GelMA/PPy/Glu can be photolithographically patterned and covalently bonded to an electrode. Fourier-transform infrared (FTIR) analysis confirmed the interpenetrating nature of PPy through the GelMA hydrogels. Electrochemical polymerisation of PPy/Glu through the GelMA hydrogels resulted in a significant increase in the charge storage capacity as determined by cyclic voltammetry (CV). Long-term electrochemical and mechanical stability was demonstrated over 1000 CV cycles and extracts of the materials were cytocompatible with SH-SY5Y neuroblastoma cell lines. Release of Glu from the CPH was responsive to electrical stimulation with almost five times the amount of Glu released upon constant reduction (-0.6 V) compared to when no stimulus was applied. Notably, GelMA/PPy/Glu was able to deliver almost 14 times higher amounts of Glu compared to conventional PPy/Glu films. The described CPH coatings are well suited in implantable drug delivery applications and compared to conducting polymer films can deliver higher quantities of drug in response to mild electrical stimulus. STATEMENT OF SIGNIFICANCE: Conducting polymer hydrogels (CPH) have been explored for the electrically controlled release of bioactives from implantable devices. Typically, the conducting polymer component does not fully penetrate the hydrogel. We report, for the first time, a completely interpenetrating CPH allowing for the full benefits of the composite material to be realised, the hydrogels provide a reservoir for drug delivery, and conducting polymer renders the material responsive to electrical stimulation for drug release. We report a CPH for the electrically controlled delivery of glutamate (excitatory neurotransmitter) where several-fold more glutamate can be delivered compared to conducting polymer films. The described CPH coatings are well suited for use in bioelectronic devices to deliver large quantities of drug in response to mild electrical stimulus.
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16
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Pitsalidis C, Pappa AM, Boys AJ, Fu Y, Moysidou CM, van Niekerk D, Saez J, Savva A, Iandolo D, Owens RM. Organic Bioelectronics for In Vitro Systems. Chem Rev 2021; 122:4700-4790. [PMID: 34910876 DOI: 10.1021/acs.chemrev.1c00539] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Bioelectronics have made strides in improving clinical diagnostics and precision medicine. The potential of bioelectronics for bidirectional interfacing with biology through continuous, label-free monitoring on one side and precise control of biological activity on the other has extended their application scope to in vitro systems. The advent of microfluidics and the considerable advances in reliability and complexity of in vitro models promise to eventually significantly reduce or replace animal studies, currently the gold standard in drug discovery and toxicology testing. Bioelectronics are anticipated to play a major role in this transition offering a much needed technology to push forward the drug discovery paradigm. Organic electronic materials, notably conjugated polymers, having demonstrated technological maturity in fields such as solar cells and light emitting diodes given their outstanding characteristics and versatility in processing, are the obvious route forward for bioelectronics due to their biomimetic nature, among other merits. This review highlights the advances in conjugated polymers for interfacing with biological tissue in vitro, aiming ultimately to develop next generation in vitro systems. We showcase in vitro interfacing across multiple length scales, involving biological models of varying complexity, from cell components to complex 3D cell cultures. The state of the art, the possibilities, and the challenges of conjugated polymers toward clinical translation of in vitro systems are also discussed throughout.
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Affiliation(s)
- Charalampos Pitsalidis
- Department of Physics, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi 127788, UAE.,Department of Chemical Engineering and Biotechnology, University of Cambridge Philippa Fawcett Drive, Cambridge CB3 0AS, U.K
| | - Anna-Maria Pappa
- Department of Biomedical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi 127788, UAE
| | - Alexander J Boys
- Department of Chemical Engineering and Biotechnology, University of Cambridge Philippa Fawcett Drive, Cambridge CB3 0AS, U.K
| | - Ying Fu
- Department of Chemical Engineering and Biotechnology, University of Cambridge Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.,Department of Pure and Applied Chemistry, Technology and Innovation Centre, University of Strathclyde, Glasgow G1 1RD, U.K
| | - Chrysanthi-Maria Moysidou
- Department of Chemical Engineering and Biotechnology, University of Cambridge Philippa Fawcett Drive, Cambridge CB3 0AS, U.K
| | - Douglas van Niekerk
- Department of Chemical Engineering and Biotechnology, University of Cambridge Philippa Fawcett Drive, Cambridge CB3 0AS, U.K
| | - Janire Saez
- Department of Chemical Engineering and Biotechnology, University of Cambridge Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.,Microfluidics Cluster UPV/EHU, BIOMICs Microfluidics Group, Lascaray Research Center, University of the Basque Country UPV/EHU, Avenida Miguel de Unamuno, 3, 01006 Vitoria-Gasteiz, Spain.,Ikerbasque, Basque Foundation for Science, E-48011 Bilbao, Spain
| | - Achilleas Savva
- Department of Chemical Engineering and Biotechnology, University of Cambridge Philippa Fawcett Drive, Cambridge CB3 0AS, U.K
| | - Donata Iandolo
- INSERM, U1059 Sainbiose, Université Jean Monnet, Mines Saint-Étienne, Université de Lyon, 42023 Saint-Étienne, France
| | - Róisín M Owens
- Department of Chemical Engineering and Biotechnology, University of Cambridge Philippa Fawcett Drive, Cambridge CB3 0AS, U.K
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17
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Liu Y, Feig VR, Bao Z. Conjugated Polymer for Implantable Electronics toward Clinical Application. Adv Healthc Mater 2021; 10:e2001916. [PMID: 33899347 DOI: 10.1002/adhm.202001916] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [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: 11/02/2020] [Revised: 12/13/2020] [Indexed: 12/21/2022]
Abstract
Owing to their excellent mechanical flexibility, mixed-conducting electrical property, and extraordinary chemical turnability, conjugated polymers have been demonstrated to be an ideal bioelectronic interface to deliver therapeutic effect in many different chronic diseases. This review article summarizes the latest advances in implantable electronics using conjugated polymers as electroactive materials and identifies remaining challenges and opportunities for developing electronic medicine. Examples of conjugated polymer-based bioelectronic devices are selectively reviewed in human clinical studies or animal studies with the potential for clinical adoption. The unique properties of conjugated polymers are highlighted and exemplified as potential solutions to address the specific challenges in electronic medicine.
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Affiliation(s)
- Yuxin Liu
- Institute of Materials Research and Engineering Agency for Science, Technology and Research Singapore 138634 Singapore
| | - Vivian Rachel Feig
- Division of Gastroenterology, Department of Medicine, Brigham and Women’s Hospital Harvard Medical School Boston MA 02115 USA
| | - Zhenan Bao
- Department of Chemical Engineering Stanford University Stanford CA 94305 USA
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18
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Liu Y. A New Antiport Mechanism Using the Abnormal Adsorption of Ions. J Phys Chem Lett 2021; 12:7632-7635. [PMID: 34351159 DOI: 10.1021/acs.jpclett.1c02110] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ion pumps are crucial in many biological and nonbiological systems, but their mechanisms have not yet been completely elucidated. Generally, it is understood that ion pumps are implemented by functional proteins. In this investigation, we have proposed a new model for the antiport process, which does not involve a "lever molecule". In this model, abnormal adsorption of the ions occurs in charged nanopores, which can adsorb more transport ions in the lower concentration phase than the higher one. The classical density functional theory (CDFT) confirms the existence of this abnormal adsorption, and the density profiles indicate that it is due to the competition between the transport and background ions. This antiport mechanism thus provides new insights into the function and design of ion pumps.
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Affiliation(s)
- Yu Liu
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
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19
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Abstract
Drug development is a long process whose main content includes drug synthesis, drug delivery, and drug evaluation. Compared with conventional drug development procedures, microfluidics has emerged as a revolutionary technology in that it offers a miniaturized and highly controllable environment for bio(chemical) reactions to take place. It is also compatible with analytical strategies to implement integrated and high-throughput screening and evaluations. In this review, we provide a comprehensive summary of the entire microfluidics-based drug development system, from drug synthesis to drug evaluation. The challenges in the current status and the prospects for future development are also discussed. We believe that this review will promote communications throughout diversified scientific and engineering communities that will continue contributing to this burgeoning field.
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Affiliation(s)
- Yuxiao Liu
- Department of Rheumatology and Immunology, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China.,State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Lingyu Sun
- Department of Rheumatology and Immunology, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China.,State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Hui Zhang
- Department of Rheumatology and Immunology, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China.,State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Luoran Shang
- Zhongshan-Xuhui Hospital, and the Shanghai Key Laboratory of Medical Epigenetics, the International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Yuanjin Zhao
- Department of Rheumatology and Immunology, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China.,State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
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20
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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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21
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Chen S, Renny MN, C. Tomé L, Olmedo‐Martínez JL, Udabe E, Jenkins EPW, Mecerreyes D, Malliaras GG, McLeod RR, Proctor CM. Reducing Passive Drug Diffusion from Electrophoretic Drug Delivery Devices through Co-Ion Engineering. Adv Sci (Weinh) 2021; 8:2003995. [PMID: 34194928 PMCID: PMC8224430 DOI: 10.1002/advs.202003995] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 02/17/2021] [Indexed: 05/13/2023]
Abstract
Implantable electrophoretic drug delivery devices have shown promise for applications ranging from treating pathologies such as epilepsy and cancer to regulating plant physiology. Upon applying a voltage, the devices electrophoretically transport charged drug molecules across an ion-conducting membrane out to the local implanted area. This solvent-flow-free "dry" delivery enables controlled drug release with minimal pressure increase at the outlet. However, a major challenge these devices face is limiting drug leakage in their idle state. Here, a method of reducing passive drug leakage through the choice of the drug co-ion is presented. By switching acetylcholine's associated co-ion from chloride to carboxylate co-ions as well as sulfopropyl acrylate-based polyanions, steady-state drug leakage rate is reduced up to sevenfold with minimal effect on the active drug delivery rate. Numerical simulations further illustrate the potential of this method and offer guidance for new material systems to suppress passive drug leakage in electrophoretic drug delivery devices.
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Affiliation(s)
- Shao‐Tuan Chen
- Electrical Engineering DivisionDepartment of EngineeringUniversity of CambridgeCambridgeCB3 0FAUK
| | - Megan N. Renny
- Materials Science and Engineering ProgramUniversity of ColoradoBoulderCO80309USA
| | - Liliana C. Tomé
- POLYMAT, University of the Basque Country UPV/EHUAvenida Tolosa 72Donostia‐San Sebastian20018Gipuzkoa, Spain
| | - Jorge L. Olmedo‐Martínez
- POLYMAT, University of the Basque Country UPV/EHUAvenida Tolosa 72Donostia‐San Sebastian20018Gipuzkoa, Spain
| | - Esther Udabe
- POLYMAT, University of the Basque Country UPV/EHUAvenida Tolosa 72Donostia‐San Sebastian20018Gipuzkoa, Spain
| | - Elise P. W. Jenkins
- Electrical Engineering DivisionDepartment of EngineeringUniversity of CambridgeCambridgeCB3 0FAUK
| | - David Mecerreyes
- POLYMAT, University of the Basque Country UPV/EHUAvenida Tolosa 72Donostia‐San Sebastian20018Gipuzkoa, Spain
- IkerbasqueBasque Foundation for ScienceBilbao48013Spain
| | - George G. Malliaras
- Electrical Engineering DivisionDepartment of EngineeringUniversity of CambridgeCambridgeCB3 0FAUK
| | - Robert R. McLeod
- Materials Science and Engineering ProgramUniversity of ColoradoBoulderCO80309USA
- Department of Electrical, Computer & Energy EngineeringUniversity of ColoradoBoulderCO80309USA
| | - Christopher M. Proctor
- Electrical Engineering DivisionDepartment of EngineeringUniversity of CambridgeCambridgeCB3 0FAUK
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22
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Gori M, Vadalà G, Giannitelli SM, Denaro V, Di Pino G. Biomedical and Tissue Engineering Strategies to Control Foreign Body Reaction to Invasive Neural Electrodes. Front Bioeng Biotechnol 2021; 9:659033. [PMID: 34113605 PMCID: PMC8185207 DOI: 10.3389/fbioe.2021.659033] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 04/27/2021] [Indexed: 12/21/2022] Open
Abstract
Neural-interfaced prostheses aim to restore sensorimotor limb functions in amputees. They rely on bidirectional neural interfaces, which represent the communication bridge between nervous system and neuroprosthetic device by controlling its movements and evoking sensory feedback. Compared to extraneural electrodes (i.e., epineural and perineural implants), intraneural electrodes, implanted within peripheral nerves, have higher selectivity and specificity of neural signal recording and nerve stimulation. However, being implanted in the nerve, their main limitation is represented by the significant inflammatory response that the body mounts around the probe, known as Foreign Body Reaction (FBR), which may hinder their rapid clinical translation. Furthermore, the mechanical mismatch between the consistency of the device and the surrounding neural tissue may contribute to exacerbate the inflammatory state. The FBR is a non-specific reaction of the host immune system to a foreign material. It is characterized by an early inflammatory phase eventually leading to the formation of a fibrotic capsule around intraneural interfaces, which increases the electrical impedance over time and reduces the chronic interface biocompatibility and functionality. Thus, the future in the reduction and control of the FBR relies on innovative biomedical strategies for the fabrication of next-generation neural interfaces, such as the development of more suitable designs of the device with smaller size, appropriate stiffness and novel conductive and biomimetic coatings for improving their long-term stability and performance. Here, we present and critically discuss the latest biomedical approaches from material chemistry and tissue engineering for controlling and mitigating the FBR in chronic neural implants.
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Affiliation(s)
- Manuele Gori
- Laboratory for Regenerative Orthopaedics, Department of Orthopaedic Surgery and Traumatology, Università Campus Bio-Medico di Roma, Rome, Italy
- Institute of Biochemistry and Cell Biology (IBBC) - National Research Council (CNR), Rome, Italy
| | - Gianluca Vadalà
- Laboratory for Regenerative Orthopaedics, Department of Orthopaedic Surgery and Traumatology, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Sara Maria Giannitelli
- Laboratory of Tissue Engineering, Department of Engineering, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Vincenzo Denaro
- Laboratory for Regenerative Orthopaedics, Department of Orthopaedic Surgery and Traumatology, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Giovanni Di Pino
- NeXT: Neurophysiology and Neuroengineering of Human-Technology Interaction Research Unit, Università Campus Bio-Medico di Roma, Rome, Italy
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23
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Siavashy S, Soltani M, Ghorbani-Bidkorbeh F, Fallah N, Farnam G, Mortazavi SA, Shirazi FH, Tehrani MHH, Hamedi MH. Microfluidic platform for synthesis and optimization of chitosan-coated magnetic nanoparticles in cisplatin delivery. Carbohydr Polym 2021; 265:118027. [PMID: 33966822 DOI: 10.1016/j.carbpol.2021.118027] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 03/02/2021] [Accepted: 03/29/2021] [Indexed: 01/03/2023]
Abstract
In this study, magnetic core/chitosan shell Nanoparticles (NPs) containing cisplatin were synthesized via cisplatin complexation with tripolyphosphate as the chitosan crosslinker using two different procedures: a conventional batch flow method and a microfluidic approach. An integrated microfluidic device composed of three stages was developed to provide precise and highly controllable mixing. The comparison of the results revealed that NPs synthesized in microchannels were monodisperse 104 ± 14.59 nm (n = 3) in size with optimal morphological characteristics, whereas polydisperse 423 ± 53.33 nm (n = 3) nanoparticles were obtained by the conventional method. Furthermore, cisplatin was loaded in NPs without becoming inactivated, and the microfluidic technique demonstrated higher encapsulation efficiency, controlled release, and consequently lower IC50 values during exposure to the A2780 cell line proving that microfluidic synthesized NPs were able to enter the cells and release the drug more efficiently. The developed microfluidic platform presents valuable features that could potentially provide the clinical translation of NPs in drug delivery.
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Affiliation(s)
- Saeed Siavashy
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran
| | - M Soltani
- Department of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran; Advanced Bioengineering Initiative Center, Computational Medicine Center, K. N. Toosi University of Technology, Tehran, Iran; Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, ON, Canada; Centre for Biotechnology and Bioengineering (CBB), University of Waterloo, Waterloo, ON, Canada.
| | - Fatemeh Ghorbani-Bidkorbeh
- Department of Pharmaceutics, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Newsha Fallah
- Department of Pharmaceutics, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Golrokh Farnam
- Department of Toxicology and Pharmacology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Alireza Mortazavi
- Department of Pharmaceutics, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farshad H Shirazi
- Department of Toxicology and Pharmacology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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24
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Olvera D, Monaghan MG. Electroactive material-based biosensors for detection and drug delivery. Adv Drug Deliv Rev 2021; 170:396-424. [PMID: 32987096 DOI: 10.1016/j.addr.2020.09.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/22/2020] [Accepted: 09/23/2020] [Indexed: 12/20/2022]
Abstract
Electroactive materials are employed at the interface of biology and electronics due to their advantageous intrinsic properties as soft organic electronics. We examine the most recent literature of electroactive material-based biosensors and their emerging role as theranostic devices for the delivery of therapeutic agents. We consider electroactive materials through the lens of smart drug delivery systems as materials that enable the release of therapeutic cargo in response to specific physiological and external stimuli and discuss the way these mechanisms are integrated into medical devices with examples of the latest advances. Studies that harness features unique to conductive polymers are emphasized; lastly, we highlight new perspectives and future research direction for this emerging technology and the challenges that remain to overcome.
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25
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Abstract
Progress in understanding neuronal interaction and circuit behavior of the central and peripheral nervous system strongly relies on the advancement of tools that record and stimulate with high fidelity and specificity. Currently, devices used in exploratory research predominantly utilize cables or tethers to provide pathways for power supply, data communication, stimulus delivery and recording, which constrains the scope and use of such devices. In particular, the tethered connection, mechanical mismatch to surrounding soft tissues and bones frustrate the interface leading to irritation and limitation of motion of the subject, which in the case of fundamental and preclinical studies, impacts naturalistic behaviors of animals and precludes the use in experiments involving social interaction and ethologically relevant three-dimensional environments, limiting the use of current tools to mostly rodents and exclude species such as birds and fish. This review explores the current state-of-the-art in wireless, subdermally implantable tools that quantitively expand capabilities in analysis and perturbation of the central and peripheral nervous system by removing tethers and externalized features of implantable neuromodulation and recording tools. Specifically, the review explores power harvesting strategies, wireless communication schemes, and soft materials and mechanics that enable the creation of such devices and discuss their capabilities in the context of freely-behaving subjects. Highlights of this class of devices includes wireless battery-free and fully implantable operation with capabilities in cell specific recording, multimodal neural stimulation and electrical, optogenetic and pharmacological neuromodulation capabilities. We conclude with discussion on translation of such technologies which promises routes towards broad dissemination.
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Affiliation(s)
- Le Cai
- Biomedical Engineering, University of Arizona, 1230 N Cherry Ave., Tucson, Arizona, 85719, UNITED STATES
| | - Philipp Gutruf
- Biomedical Engineering, University of Arizona, 1230 N Cherry Ave., Tucson, Arizona, 85719, UNITED STATES
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Kane KI, Jarazo J, Moreno EL, Fleming RM, Schwamborn JC. Passive controlled flow for Parkinson's disease neuronal cell culture in 3D microfluidic devices. ACTA ACUST UNITED AC 2020; 2:100005. [DOI: 10.1016/j.ooc.2020.100005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Affiliation(s)
- Anna Herland
- Division of Micro and Nanosystems, KTH Royal Institute of Technology, Stockholm, 10044, Sweden.,Center for the Advancement of Integrated Medical and Engineering Sciences - AIMES, Department of Neuroscience, Karolinska Institute, Stockholm, 17177, Sweden
| | - Myung-Han Yoon
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
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28
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Ghosh A, Li L, Xu L, Dash RP, Gupta N, Lam J, Jin Q, Akshintala V, Pahapale G, Liu W, Sarkar A, Rais R, Gracias DH, Selaru FM. Gastrointestinal-resident, shape-changing microdevices extend drug release in vivo. Sci Adv 2020; 6:6/44/eabb4133. [PMID: 33115736 PMCID: PMC7608789 DOI: 10.1126/sciadv.abb4133] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 09/11/2020] [Indexed: 05/05/2023]
Abstract
Extended-release gastrointestinal (GI) luminal delivery substantially increases the ease of administration of drugs and consequently the adherence to therapeutic regimens. However, because of clearance by intrinsic GI motility, device gastroretention and extended drug release over a prolonged duration are very challenging. Here, we report that GI parasite-inspired active mechanochemical therapeutic grippers, or theragrippers, can reside within the GI tract of live animals for 24 hours by autonomously latching onto the mucosal tissue. We also observe a notable sixfold increase in the elimination half-life using theragripper-mediated delivery of a model analgesic ketorolac tromethamine. These results provide first-in-class evidence that shape-changing and self-latching microdevices enhance the efficacy of extended drug delivery.
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Affiliation(s)
- Arijit Ghosh
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Ling Li
- Division of Gastroenterology and Hepatology, Department of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Liyi Xu
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Ranjeet P Dash
- Johns Hopkins Drug Discovery, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Neha Gupta
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Jenny Lam
- Johns Hopkins Drug Discovery, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Qianru Jin
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Venkata Akshintala
- Division of Gastroenterology and Hepatology, Department of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Gayatri Pahapale
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Wangqu Liu
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Anjishnu Sarkar
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Rana Rais
- Johns Hopkins Drug Discovery, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University, Baltimore, MD 21205, USA
| | - David H Gracias
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Florin M Selaru
- Division of Gastroenterology and Hepatology, Department of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA.
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29
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Ohayon D, Inal S. Organic Bioelectronics: From Functional Materials to Next-Generation Devices and Power Sources. Adv Mater 2020; 32:e2001439. [PMID: 32691880 DOI: 10.1002/adma.202001439] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [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: 02/28/2020] [Revised: 05/03/2020] [Indexed: 05/23/2023]
Abstract
Conjugated polymers (CPs) possess a unique set of features setting them apart from other materials. These properties make them ideal when interfacing the biological world electronically. Their mixed electronic and ionic conductivity can be used to detect weak biological signals, deliver charged bioactive molecules, and mechanically or electrically stimulate tissues. CPs can be functionalized with various (bio)chemical moieties and blend with other functional materials, with the aim of modulating biological responses or endow specificity toward analytes of interest. They can absorb photons and generate electronic charges that are then used to stimulate cells or produce fuels. These polymers also have catalytic properties allowing them to harvest ambient energy and, along with their high capacitances, are promising materials for next-generation power sources integrated with bioelectronic devices. In this perspective, an overview of the key properties of CPs and examination of operational mechanism of electronic devices that leverage these properties for specific applications in bioelectronics is provided. In addition to discussing the chemical structure-functionality relationships of CPs applied at the biological interface, the development of new chemistries and form factors that would bring forth next-generation sensors, actuators, and their power sources, and, hence, advances in the field of organic bioelectronics is described.
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Affiliation(s)
- David Ohayon
- Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
| | - Sahika Inal
- Organic Bioelectronics Laboratory, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia
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30
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Cardoso RM, dos Santos RO, Munoz RAA, Garcia CD, Blanes L. A Multi-Pump Magnetohydrodynamics Lab-On-A-Chip Device for Automated Flow Control and Analyte Delivery. Sensors (Basel) 2020; 20:s20174909. [PMID: 32877999 PMCID: PMC7506898 DOI: 10.3390/s20174909] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/15/2020] [Accepted: 08/24/2020] [Indexed: 11/16/2022]
Abstract
This article shows the development of a computer-controlled lab-on-a-chip device with three magnetohydrodynamic (MHD) pumps and a pneumatic valve. The chip was made of a stack of layers of polymethylmethacrylate (PMMA), cut using a laser engraver and thermally bonded. The MHD pumps were built using permanent magnets (neodymium) and platinum electrodes, all of them controlled by an Arduino board and a set of relays. The implemented pumps were able to drive solutions in the open channels with a flow rate that increased proportionally with the channel width and applied voltage. To address the characteristic low pressures generated by this kind of pump, all channels were interconnected. Because the electrodes were immersed in the electrolyte, causing electrolysis and pH variations, the composition and ionic strength of the electrolyte solution were controlled. Additionally, side structures for releasing bubbles were integrated. With this multi-pump and valve solution, the device was used to demonstrate the possibility of performing an injection sequence in a system that resembles a traditional flow injection analysis system. Ultimately, the results demonstrate the possibility of performing injection sequences using an array of MHD pumps that can perform fluid handling in the 0-5 µL s-1 range.
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Affiliation(s)
- Rafael M. Cardoso
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia 38400-000, Brazil; (R.M.C.); (R.A.A.M.)
| | - Robson O. dos Santos
- Laboratory for Applied Science and Technology in Health, Carlos Chagas Institute, Oswaldo Cruz Foundation (Fiocruz), Curitiba 81350-010, Brazil;
| | - Rodrigo A. A. Munoz
- Institute of Chemistry, Federal University of Uberlândia, Uberlândia 38400-000, Brazil; (R.M.C.); (R.A.A.M.)
| | - Carlos D. Garcia
- Department of Chemistry, Clemson University, Clemson, SC 29634, USA
- Correspondence: (C.D.G); (L.B.)
| | - Lucas Blanes
- Laboratory for Applied Science and Technology in Health, Carlos Chagas Institute, Oswaldo Cruz Foundation (Fiocruz), Curitiba 81350-010, Brazil;
- Correspondence: (C.D.G); (L.B.)
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31
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Cong S, Creamer A, Fei Z, Hillman SAJ, Rapley C, Nelson J, Heeney M. Tunable Control of the Hydrophilicity and Wettability of Conjugated Polymers by a Postpolymerization Modification Approach. Macromol Biosci 2020; 20:e2000087. [PMID: 32537851 DOI: 10.1002/mabi.202000087] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 03/20/2020] [Revised: 03/28/2020] [Indexed: 11/08/2022]
Abstract
A facile method to prepare hydrophilic polymers by a postpolymerization nucleophillic aromatic substitution reaction of fluoride on an emissive conjugated polymer (CP) backbone is reported. Quantitative functionalization by a series of monofunctionalized ethylene glycol oligomers, from dimer to hexamer, as well as with high molecular weight polyethylene glycol is demonstrated. The length of the ethylene glycol sidechains is shown to have a direct impact on the surface wettability of the polymer, as well as its solubility in polar solvents. However, the energetics and band gap of the CPs remain essentially constant. This method therefore allows an easy way to modulate the wettability and solubility of CP materials for a diverse series of applications.
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Affiliation(s)
- Shengyu Cong
- Department of Chemistry and Centre for Processable Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK
| | - Adam Creamer
- Department of Chemistry and Centre for Processable Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK
| | - Zhuping Fei
- Institute of Molecular Plus, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin, 300072, P. R. China
| | - Sam A J Hillman
- Department of Physics and Centre for Processable Electronics, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Charlotte Rapley
- Department of Chemistry and Centre for Processable Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK
| | - Jenny Nelson
- Department of Physics and Centre for Processable Electronics, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Martin Heeney
- Department of Chemistry and Centre for Processable Electronics, Imperial College London, White City Campus, London, W12 0BZ, UK
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32
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Abstract
Electrophoretic drug delivery devices are able to deliver drugs with exceptional temporal and spatial precision. This technology has emerged as a promising platform for treating pathologies ranging from neuropathic pain to epilepsy. As the range of applications continues to expand, there is an urgent need to understand the underlying physics and estimate materials and device parameters for optimal performance. Here, computational modeling of the electrophoretic drug delivery device is carried out. Three critical performance indices, namely, the amount of drug transported, the pumping efficiency and the ON/OFF ratio are investigated as a function of initial drug concentration in the device and fixed charge concentration in the ion exchange membrane. The results provide guidelines for future materials and device design with an eye towards tailoring device performance to match disease-specific demands.
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Affiliation(s)
- Shao-Tuan Chen
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK
| | - Christopher M Proctor
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
| | - George G Malliaras
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK.
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33
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Rochford AE, Carnicer-Lombarte A, Curto VF, Malliaras GG, Barone DG. When Bio Meets Technology: Biohybrid Neural Interfaces. Adv Mater 2020; 32:e1903182. [PMID: 31517403 DOI: 10.1002/adma.201903182] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [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: 05/18/2019] [Revised: 07/06/2019] [Indexed: 06/10/2023]
Abstract
The development of electronics capable of interfacing with the nervous system is a rapidly advancing field with applications in basic science and clinical translation. Devices containing arrays of electrodes can be used in the study of cells grown in culture or can be implanted into damaged or dysfunctional tissue to restore normal function. While devices are typically designed and used exclusively for one of these two purposes, there have been increasing efforts in developing implantable electrode arrays capable of housing cultured cells, referred to as biohybrid implants. Once implanted, the cells within these implants integrate into the tissue, serving as a mediator of the electrode-tissue interface. This biological component offers unique advantages to these implant designs, providing better tissue integration and potentially long-term stability. Herein, an overview of current research into biohybrid devices, as well as the historical background that led to their development are provided, based on the host anatomical location for which they are designed (CNS, PNS, or special senses). Finally, a summary of the key challenges of this technology and potential future research directions are presented.
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Affiliation(s)
- Amy E Rochford
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK
| | | | - Vincenzo F Curto
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK
| | - George G Malliaras
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK
| | - Damiano G Barone
- Electrical Engineering Division, Department of Engineering, University of Cambridge, Cambridge, CB3 0FA, UK
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, CB2 0QQ, UK
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34
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da Silva Morais A, Vieira S, Zhao X, Mao Z, Gao C, Oliveira JM, Reis RL. Advanced Biomaterials and Processing Methods for Liver Regeneration: State-of-the-Art and Future Trends. Adv Healthc Mater 2020; 9:e1901435. [PMID: 31977159 DOI: 10.1002/adhm.201901435] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/13/2019] [Indexed: 12/17/2022]
Abstract
Liver diseases contribute markedly to the global burden of mortality and disease. The limited organ disposal for orthotopic liver transplantation results in a continuing need for alternative strategies. Over the past years, important progress has been made in the field of tissue engineering (TE). Many of the early trials to improve the development of an engineered tissue construct are based on seeding cells onto biomaterial scaffolds. Nowadays, several TE approaches have been developed and are applied to one vital organ: the liver. Essential elements must be considered in liver TE-cells and culturing systems, bioactive agents or growth factors (GF), and biomaterials and processing methods. The potential of hepatocytes, mesenchymal stem cells, and others as cell sources is demonstrated. They need engineered biomaterial-based scaffolds with perfect biocompatibility and bioactivity to support cell proliferation and hepatic differentiation as well as allowing extracellular matrix deposition and vascularization. Moreover, they require a microenvironment provided using conventional or advanced processing technologies in order to supply oxygen, nutrients, and GF. Herein the biomaterials and the conventional and advanced processing technologies, including cell-sheets process, 3D bioprinting, and microfluidic systems, as well as the future trends in these major fields are discussed.
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Affiliation(s)
- Alain da Silva Morais
- 3B's Research GroupI3Bs – Research Institute on Biomaterials, Biodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine 4805‐017 Barco Guimarães Portugal
- ICVS/3B's–PT Government Associate Laboratory Braga/ Guimarães Portugal
| | - Sílvia Vieira
- 3B's Research GroupI3Bs – Research Institute on Biomaterials, Biodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine 4805‐017 Barco Guimarães Portugal
- ICVS/3B's–PT Government Associate Laboratory Braga/ Guimarães Portugal
| | - Xinlian Zhao
- MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Zhengwei Mao
- MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang University Hangzhou 310027 China
| | - Joaquim M. Oliveira
- 3B's Research GroupI3Bs – Research Institute on Biomaterials, Biodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine 4805‐017 Barco Guimarães Portugal
- ICVS/3B's–PT Government Associate Laboratory Braga/ Guimarães Portugal
- The Discoveries Centre for Regenerative and Precision MedicineUniversity of Minho 4805‐017 Barco Guimarães Portugal
| | - Rui L. Reis
- 3B's Research GroupI3Bs – Research Institute on Biomaterials, Biodegradables and BiomimeticsUniversity of MinhoHeadquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine 4805‐017 Barco Guimarães Portugal
- ICVS/3B's–PT Government Associate Laboratory Braga/ Guimarães Portugal
- The Discoveries Centre for Regenerative and Precision MedicineUniversity of Minho 4805‐017 Barco Guimarães Portugal
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Habelt B, Arvaneh M, Bernhardt N, Minev I. Biomarkers and neuromodulation techniques in substance use disorders. Bioelectron Med 2020; 6:4. [PMID: 32232112 PMCID: PMC7098236 DOI: 10.1186/s42234-020-0040-0] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 01/29/2020] [Indexed: 01/10/2023] Open
Abstract
Addictive disorders are a severe health concern. Conventional therapies have just moderate success and the probability of relapse after treatment remains high. Brain stimulation techniques, such as transcranial Direct Current Stimulation (tDCS) and Deep Brain Stimulation (DBS), have been shown to be effective in reducing subjectively rated substance craving. However, there are few objective and measurable parameters that reflect neural mechanisms of addictive disorders and relapse. Key electrophysiological features that characterize substance related changes in neural processing are Event-Related Potentials (ERP). These high temporal resolution measurements of brain activity are able to identify neurocognitive correlates of addictive behaviours. Moreover, ERP have shown utility as biomarkers to predict treatment outcome and relapse probability. A future direction for the treatment of addiction might include neural interfaces able to detect addiction-related neurophysiological parameters and deploy neuromodulation adapted to the identified pathological features in a closed-loop fashion. Such systems may go beyond electrical recording and stimulation to employ sensing and neuromodulation in the pharmacological domain as well as advanced signal analysis and machine learning algorithms. In this review, we describe the state-of-the-art in the treatment of addictive disorders with electrical brain stimulation and its effect on addiction-related neurophysiological markers. We discuss advanced signal processing approaches and multi-modal neural interfaces as building blocks in future bioelectronics systems for treatment of addictive disorders.
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Affiliation(s)
- Bettina Habelt
- Department of Psychiatry and Psychotherapy, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Mahnaz Arvaneh
- Department of Automatic Control and Systems Engineering, University of Sheffield, Sheffield, UK
| | - Nadine Bernhardt
- Department of Psychiatry and Psychotherapy, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Ivan Minev
- Department of Automatic Control and Systems Engineering, University of Sheffield, Sheffield, UK
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36
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da Silva Morais A, Oliveira JM, Reis RL. Biomaterials and Microfluidics for Liver Models. Advances in Experimental Medicine and Biology 2020; 1230:65-86. [DOI: 10.1007/978-3-030-36588-2_5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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37
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Proctor CM, Chan CY, Porcarelli L, Udabe E, Sanchez-Sanchez A, del Agua I, Mecerreyes D, Malliaras GG. Ionic Hydrogel for Accelerated Dopamine Delivery via Retrodialysis. Chem Mater 2019; 31:7080-7084. [PMID: 32063677 PMCID: PMC7011752 DOI: 10.1021/acs.chemmater.9b02135] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 07/26/2019] [Indexed: 05/26/2023]
Abstract
Local drug delivery directly to the source of a given pathology using retrodialysis is a promising approach to treating otherwise untreatable diseases. As the primary material component in retrodialysis, the semipermeable membrane represents a critical point for innovation. This work presents a new ionic hydrogel based on polyethylene glycol and acrylate with dopamine counterions. The ionic hydrogel membrane is shown to be a promising material for controlled diffusive delivery of dopamine. The ionic nature of the membrane accelerates uptake of cationic species compared to a nonionic membrane of otherwise similar composition. It is demonstrated that the increased uptake of cations can be exploited to confer an accelerated transport of cationic species between reservoirs as is desired in retrodialysis applications. This effect is shown to enable nearly 10-fold increases in drug delivery rates from low concentration solutions. The processability of the membrane is found to allow for integration with microfabricated devices which will in turn accelerate adaptation into both existing and emerging device modalities. It is anticipated that a similar materials design approach may be broadly applied to a variety of cationic and anionic compounds for drug delivery applications ranging from neurological disorders to cancer.
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Affiliation(s)
- Christopher M. Proctor
- Electrical Engineering
Division, Department of Engineering, University
of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Chung Yuen Chan
- Electrical Engineering
Division, Department of Engineering, University
of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Luca Porcarelli
- POLYMAT University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia-San
Sebastian, Spain
| | - Esther Udabe
- POLYMAT University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia-San
Sebastian, Spain
| | - Ana Sanchez-Sanchez
- Electrical Engineering
Division, Department of Engineering, University
of Cambridge, Cambridge CB3 0FA, United Kingdom
- POLYMAT University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia-San
Sebastian, Spain
| | - Isabel del Agua
- POLYMAT University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia-San
Sebastian, Spain
| | - David Mecerreyes
- POLYMAT University of the Basque Country UPV/EHU, Joxe Mari Korta Center, Avda. Tolosa
72, 20018 Donostia-San
Sebastian, Spain
| | - George G. Malliaras
- Electrical Engineering
Division, Department of Engineering, University
of Cambridge, Cambridge CB3 0FA, United Kingdom
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38
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Abstract
Monitoring and modulating the diversity of signals used by neurons and glia in a closed-loop fashion is necessary to establish causative links between biochemical processes within the nervous system and observed behaviors. As developments in neural-interface hardware strive to keep pace with rapid progress in genetically encoded and synthetic reporters and modulators of neural activity, the integration of multiple functional features becomes a key requirement and a pressing challenge in the field of neural engineering. Electrical, optical and chemical approaches have been used to manipulate and record neuronal activity in vivo, with a recent focus on technologies that both integrate multiple modes of interaction with neurons into a single device and enable bidirectional communication with neural circuits with enhanced spatiotemporal precision. These technologies not only are facilitating a greater understanding of the brain, spinal cord and peripheral circuits in the context of health and disease, but also are informing the development of future closed-loop therapies for neurological, neuro-immune and neuroendocrine conditions.
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Affiliation(s)
- James A Frank
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Marc-Joseph Antonini
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Harvard/MIT Health Science & Technology Graduate Program, Cambridge, MA, USA
| | - Polina Anikeeva
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA, USA.
- McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Department of Material Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
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39
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Wang J, Wang H, He T, He B, Thakor NV, Lee C. Investigation of Low-Current Direct Stimulation for Rehabilitation Treatment Related to Muscle Function Loss Using Self-Powered TENG System. Adv Sci (Weinh) 2019; 6:1900149. [PMID: 31380204 PMCID: PMC6662055 DOI: 10.1002/advs.201900149] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 03/13/2019] [Indexed: 05/19/2023]
Abstract
Muscle function loss is characterized as abnormal or completely lost muscle capabilities, and it can result from neurological disorders or nerve injuries. The currently available clinical treatment is to electrically stimulate the diseased muscles. Here, a self-powered system of a stacked-layer triboelectric nanogenerator (TENG) and a multiple-channel epimysial electrode to directly stimulate muscles is demonstrated. Then, the two challenges regarding direct TENG muscle stimulation are further investigated. For the first challenge of improving low-current TENG stimulation efficiency, it is found that the optimum stimulation efficiency can be achieved by conducting a systematic mapping with a multiple-channel epimysial electrode. The second challenge is TENG stimulation stability. It is found that the force output generated by TENGs is more stable than using the conventional square wave stimulation and enveloped high frequency stimulation. With modelling and in vivo measurements, it is confirmed that the two factors that account for the stable stimulation using TENGs are the long pulse duration and low current amplitude. The current waveform of TENGs can effectively avoid synchronous motoneuron recruitment at the two stimulation electrodes to reduce force fluctuation. Here, after investigating these two challenges, it is believed that TENG direct muscle stimulation could be used for rehabilitative and therapeutic purpose of muscle function loss treatment.
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Affiliation(s)
- Jiahui Wang
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3117576Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐COR117456Singapore
- Hybrid‐Integrated Flexible (Stretchable) Electronic Systems ProgramNational University of Singapore5 Engineering Drive 1117608Singapore
| | - Hao Wang
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3117576Singapore
- Hybrid‐Integrated Flexible (Stretchable) Electronic Systems ProgramNational University of Singapore5 Engineering Drive 1117608Singapore
| | - Tianyiyi He
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3117576Singapore
- Hybrid‐Integrated Flexible (Stretchable) Electronic Systems ProgramNational University of Singapore5 Engineering Drive 1117608Singapore
- NUS Suzhou Research Institute (NUSRI)SuzhouIndustrial Park, Suzhou215123P. R. China
| | - Borong He
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3117576Singapore
- Hybrid‐Integrated Flexible (Stretchable) Electronic Systems ProgramNational University of Singapore5 Engineering Drive 1117608Singapore
| | - Nitish V. Thakor
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3117576Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐COR117456Singapore
- Hybrid‐Integrated Flexible (Stretchable) Electronic Systems ProgramNational University of Singapore5 Engineering Drive 1117608Singapore
| | - Chengkuo Lee
- Department of Electrical and Computer EngineeringNational University of Singapore4 Engineering Drive 3117576Singapore
- Singapore Institute for Neurotechnology (SINAPSE)National University of Singapore28 Medical Drive, #05‐COR117456Singapore
- Hybrid‐Integrated Flexible (Stretchable) Electronic Systems ProgramNational University of Singapore5 Engineering Drive 1117608Singapore
- NUS Suzhou Research Institute (NUSRI)SuzhouIndustrial Park, Suzhou215123P. R. China
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40
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Abstract
Conducting polymers are considered to be favorable electrode materials for implanted biosensors and bioelectronics, because their mechanical properties are similar to those of biological tissues such as nerve and brain tissues. However, one of the primary challenges for implanted devices is to prevent the unwanted protein adhesion or cell binding within biological fluids. The nonspecific adsorption generally causes the malfunction of implanted devices, which is problematic for long-term applications. When responding to the requirements of solving the problems caused by nonspecific adsorption, an increasing number of studies on antifouling conducting polymers has been recently published. In this review, synthetic strategies for preparing antifouling conducting polymers, including direct synthesis of functional monomers and post-functionalization, are introduced. The applications of antifouling conducting polymers in modern biomedical applications are particularly highlighted. This paper presents focuses on the features of antifouling conducting polymers and the challenges of modern biomedical applications.
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Affiliation(s)
- Jhih-Guang Wu
- Department of Materials Science and Engineering , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 10617 , Taiwan
| | - Jie-Hao Chen
- Department of Materials Science and Engineering , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 10617 , Taiwan
| | - Kuan-Ting Liu
- Department of Materials Science and Engineering , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 10617 , Taiwan
| | - Shyh-Chyang Luo
- Department of Materials Science and Engineering , National Taiwan University , No. 1, Sec. 4, Roosevelt Road , Taipei 10617 , Taiwan
- Advanced Research Center for Green Materials Science and Technology , National Taiwan University , Taipei 10617 , Taiwan
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41
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Abstract
The widespread use of conducting polymers, especially poly(3,4-ethylene dioxythiophene) (PEDOT), within the space of bioelectronics has enabled improvements, both in terms of electrochemistry and functional versatility, of conventional metallic electrodes. This short review aims to provide an overview of how PEDOT coatings have contributed to functionalizing existing bioelectronics, the challenges which meet conducting polymer coatings from a regulatory and stability point of view and the possibilities to bring PEDOT-based coatings into large-scale clinical applications. Finally, their potential use for enabling new technologies for the field of bioelectronics as biodegradable, stretchable and slow-stimulation materials will be discussed.
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Affiliation(s)
- Christian Boehler
- BrainLinks-BrainTools Center, University of Freiburg, Freiburg, Germany
- Department of Microsystems Engineering (IMTEK), University of Freiburg, Freiburg, Germany
| | - Zaid Aqrawe
- Department of Anatomy & Medical Imaging, The University of Auckland, Auckland, New Zealand
| | - Maria Asplund
- BrainLinks-BrainTools Center, University of Freiburg, Freiburg, Germany
- Department of Microsystems Engineering (IMTEK), University of Freiburg, Freiburg, Germany
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42
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Fidanovski K, Mawad D. Conjugated Polymers in Bioelectronics: Addressing the Interface Challenge. Adv Healthc Mater 2019; 8:e1900053. [PMID: 30941922 DOI: 10.1002/adhm.201900053] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 02/22/2019] [Indexed: 12/21/2022]
Abstract
Conjugated polymers are the material of choice for organic bioelectronic interfaces as they combine mechanical flexibility with electric and ionic conductivity. Their attractive properties are largely demonstrated in vitro, while the in vivo applications are limited to the coating of inorganic electrodes, where they are used to improve the intimate electronic contact between the device and the tissue. However, there has not been a commensurate rise in the in vivo applications of entirely organic implantable electronic devices based on conjugated polymers. To date, there is no comprehensive understanding of how these devices will interface with real biological systems. With the push toward increasingly thinner and more flexible next generation medical implants, this limitation remains a major detractor in the translation of conjugated polymers toward biological applications. This research news article examines the few reported in vivo studies and attempts to establish why there is such a dearth in the literature.
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Affiliation(s)
- Kristina Fidanovski
- School of Materials Science and Engineering UNSW Sydney Sydney New South Wales 2052 Australia
| | - Damia Mawad
- School of Materials Science and Engineering UNSW Sydney Sydney New South Wales 2052 Australia
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43
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Berggren M, Crispin X, Fabiano S, Jonsson MP, Simon DT, Stavrinidou E, Tybrandt K, Zozoulenko I. Ion Electron-Coupled Functionality in Materials and Devices Based on Conjugated Polymers. Adv Mater 2019; 31:e1805813. [PMID: 30620417 DOI: 10.1002/adma.201805813] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/16/2018] [Indexed: 05/23/2023]
Abstract
The coupling between charge accumulation in a conjugated polymer and the ionic charge compensation, provided from an electrolyte, defines the mode of operation in a vast array of different organic electrochemical devices. The most explored mixed organic ion-electron conductor, serving as the active electrode in these devices, is poly(3,4-ethyelenedioxythiophene) doped with polystyrelensulfonate (PEDOT:PSS). In this progress report, scientists of the Laboratory of Organic Electronics at Linköping University review some of the achievements derived over the last two decades in the field of organic electrochemical devices, in particular including PEDOT:PSS as the active material. The recently established understanding of the volumetric capacitance and the mixed ion-electron charge transport properties of PEDOT are described along with examples of various devices and phenomena utilizing this ion-electron coupling, such as the organic electrochemical transistor, ionic-electronic thermodiffusion, electrochromic devices, surface switches, and more. One of the pioneers in this exciting research field is Prof. Olle Inganäs and the authors of this progress report wish to celebrate and acknowledge all the fantastic achievements and inspiration accomplished by Prof. Inganäs all since 1981.
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Affiliation(s)
- Magnus Berggren
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
| | - Xavier Crispin
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
| | - Simone Fabiano
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
| | - Magnus P Jonsson
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
| | - Daniel T Simon
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
| | - Eleni Stavrinidou
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
| | - Klas Tybrandt
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
| | - Igor Zozoulenko
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, SE-601 74, Norrköping, Sweden
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44
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Zeglio E, Rutz AL, Winkler TE, Malliaras GG, Herland A. Conjugated Polymers for Assessing and Controlling Biological Functions. Adv Mater 2019; 31:e1806712. [PMID: 30861237 DOI: 10.1002/adma.201806712] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [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: 10/16/2018] [Revised: 01/15/2019] [Indexed: 05/20/2023]
Abstract
The field of organic bioelectronics is advancing rapidly in the development of materials and devices to precisely monitor and control biological signals. Electronics and biology can interact on multiple levels: organs, complex tissues, cells, cell membranes, proteins, and even small molecules. Compared to traditional electronic materials such as metals and inorganic semiconductors, conjugated polymers (CPs) have several key advantages for biological interactions: tunable physiochemical properties, adjustable form factors, and mixed conductivity (ionic and electronic). Herein, the use of CPs in five biologically oriented research topics, electrophysiology, tissue engineering, drug release, biosensing, and molecular bioelectronics, is discussed. In electrophysiology, implantable devices with CP coating or CP-only electrodes are showing improvements in signal performance and tissue interfaces. CP-based scaffolds supply highly favorable static or even dynamic interfaces for tissue engineering. CPs also enable delivery of drugs through a variety of mechanisms and form factors. For biosensing, CPs offer new possibilities to incorporate biological sensing elements in a conducting matrix. Molecular bioelectronics is today used to incorporate (opto)electronic functions in living tissue. Under each topic, the limits of the utility of CPs are discussed and, overall, the major challenges toward implementation of CPs and their devices to real-world applications are highlighted.
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Affiliation(s)
- Erica Zeglio
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Alexandra L Rutz
- Electrical Engineering Division, Department of Engineering, University of Cambridge, 9 JJ Thomson Ave., Cambridge, CB3 0FA, UK
| | - Thomas E Winkler
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - George G Malliaras
- Electrical Engineering Division, Department of Engineering, University of Cambridge, 9 JJ Thomson Ave., Cambridge, CB3 0FA, UK
| | - Anna Herland
- Department of Micro and Nanosystems, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
- Swedish Medical Nanoscience Center, Department of Neuroscience, Karolinska Institute, 17177, Stockholm, Sweden
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45
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Flagg LQ, Bischak CG, Onorato JW, Rashid RB, Luscombe CK, Ginger DS. Polymer Crystallinity Controls Water Uptake in Glycol Side-Chain Polymer Organic Electrochemical Transistors. J Am Chem Soc 2019; 141:4345-4354. [DOI: 10.1021/jacs.8b12640] [Citation(s) in RCA: 115] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | | | | | - Reem B. Rashid
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States
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46
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Proctor CM, Uguz I, Slezia A, Curto V, Inal S, Williamson A, Malliaras GG. An Electrocorticography Device with an Integrated Microfluidic Ion Pump for Simultaneous Neural Recording and Electrophoretic Drug Delivery In Vivo. ACTA ACUST UNITED AC 2018; 3:e1800270. [DOI: 10.1002/adbi.201800270] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 10/27/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Christopher M. Proctor
- Department of Engineering; University of Cambridge; Cambridge CB3 0FA UK
- Department of Bioelectronics; Ecole Nationale Superieure des Mines; CMP-EMSE; MOC; 13541 Gardanne France
| | - Ilke Uguz
- Department of Bioelectronics; Ecole Nationale Superieure des Mines; CMP-EMSE; MOC; 13541 Gardanne France
- Department of Electrical Engineering; Colombia University; NY 10027 USA
| | - Andrea Slezia
- Institut de Neurosciences des Systèmes; Aix Marseille Université; INS, UMR_S 1106 13005 Marseille France
- Neuroengineering Research Group; Interdisciplinary Excellence Center; Department of Medical Microbiology and Immunobiology; University of Szeged; Szeged H-6720 Hungary
| | - Vincenzo Curto
- Department of Engineering; University of Cambridge; Cambridge CB3 0FA UK
- Department of Bioelectronics; Ecole Nationale Superieure des Mines; CMP-EMSE; MOC; 13541 Gardanne France
| | - Sahika Inal
- Department of Bioelectronics; Ecole Nationale Superieure des Mines; CMP-EMSE; MOC; 13541 Gardanne France
- Biological and Environmental Science and Engineering; King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabia
| | - Adam Williamson
- Institut de Neurosciences des Systèmes; Aix Marseille Université; INS, UMR_S 1106 13005 Marseille France
- Neuroengineering Research Group; Interdisciplinary Excellence Center; Department of Medical Microbiology and Immunobiology; University of Szeged; Szeged H-6720 Hungary
| | - George G. Malliaras
- Department of Engineering; University of Cambridge; Cambridge CB3 0FA UK
- Department of Bioelectronics; Ecole Nationale Superieure des Mines; CMP-EMSE; MOC; 13541 Gardanne France
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47
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Feron K, Lim R, Sherwood C, Keynes A, Brichta A, Dastoor PC. Organic Bioelectronics: Materials and Biocompatibility. Int J Mol Sci 2018; 19:E2382. [PMID: 30104515 PMCID: PMC6121695 DOI: 10.3390/ijms19082382] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [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: 07/10/2018] [Revised: 08/08/2018] [Accepted: 08/10/2018] [Indexed: 01/06/2023] Open
Abstract
Organic electronic materials have been considered for a wide-range of technological applications. More recently these organic (semi)conductors (encompassing both conducting and semi-conducting organic electronic materials) have received increasing attention as materials for bioelectronic applications. Biological tissues typically comprise soft, elastic, carbon-based macromolecules and polymers, and communication in these biological systems is usually mediated via mixed electronic and ionic conduction. In contrast to hard inorganic semiconductors, whose primary charge carriers are electrons and holes, organic (semi)conductors uniquely match the mechanical and conduction properties of biotic tissue. Here, we review the biocompatibility of organic electronic materials and their implementation in bioelectronic applications.
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Affiliation(s)
- Krishna Feron
- Centre for Organic Electronics, University of Newcastle, Callaghan, Newcastle, NSW 2308, Australia.
| | - Rebecca Lim
- Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, Newcastle, NSW 2308, Australia.
| | - Connor Sherwood
- Centre for Organic Electronics, University of Newcastle, Callaghan, Newcastle, NSW 2308, Australia.
- Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, Newcastle, NSW 2308, Australia.
| | - Angela Keynes
- Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, Newcastle, NSW 2308, Australia.
| | - Alan Brichta
- Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, Newcastle, NSW 2308, Australia.
| | - Paul C Dastoor
- Centre for Organic Electronics, University of Newcastle, Callaghan, Newcastle, NSW 2308, Australia.
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48
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Proctor CM, Slézia A, Kaszas A, Ghestem A, del Agua I, Pappa AM, Bernard C, Williamson A, Malliaras GG. Electrophoretic drug delivery for seizure control. Sci Adv 2018; 4:eaau1291. [PMID: 30167463 PMCID: PMC6114990 DOI: 10.1126/sciadv.aau1291] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 07/19/2018] [Indexed: 05/20/2023]
Abstract
The persistence of intractable neurological disorders necessitates novel therapeutic solutions. We demonstrate the utility of direct in situ electrophoretic drug delivery to treat neurological disorders. We present a neural probe incorporating a microfluidic ion pump (μFIP) for on-demand drug delivery and electrodes for recording local neural activity. The μFIP works by electrophoretically pumping ions across an ion exchange membrane and thereby delivers only the drug of interest and not the solvent. This "dry" delivery enables precise drug release into the brain region with negligible local pressure increase. The therapeutic potential of the μFIP probe is tested in a rodent model of epilepsy. The μFIP probe can detect pathological activity and then intervene to stop seizures by delivering inhibitory neurotransmitters directly to the seizure source. We anticipate that further tailored engineering of the μFIP platform will enable additional applications in neural interfacing and the treatment of neurological disorders.
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Affiliation(s)
- Christopher M. Proctor
- Electrical Engineering Division, University of Cambridge, Cambridge CB3 0FA, UK
- Department of Bioelectronics, Ecole Nationale Supérieure des Mines, CMP-EMSE, 13541 Gardanne, France
| | - Andrea Slézia
- Aix Marseille Université, Institut de Neurosciences des Systèmes, UMR_S 1106, 13005 Marseille, France
| | - Attila Kaszas
- Aix Marseille Université, Institut de Neurosciences des Systèmes, UMR_S 1106, 13005 Marseille, France
| | - Antoine Ghestem
- Aix Marseille Université, Institut de Neurosciences des Systèmes, UMR_S 1106, 13005 Marseille, France
| | - Isabel del Agua
- Department of Bioelectronics, Ecole Nationale Supérieure des Mines, CMP-EMSE, 13541 Gardanne, France
| | - Anna-Maria Pappa
- Electrical Engineering Division, University of Cambridge, Cambridge CB3 0FA, UK
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 3RA, UK
| | - Christophe Bernard
- Aix Marseille Université, Institut de Neurosciences des Systèmes, UMR_S 1106, 13005 Marseille, France
| | - Adam Williamson
- Aix Marseille Université, Institut de Neurosciences des Systèmes, UMR_S 1106, 13005 Marseille, France
- Corresponding author. (G.G.M.); (A.W.)
| | - George G. Malliaras
- Electrical Engineering Division, University of Cambridge, Cambridge CB3 0FA, UK
- Department of Bioelectronics, Ecole Nationale Supérieure des Mines, CMP-EMSE, 13541 Gardanne, France
- Corresponding author. (G.G.M.); (A.W.)
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Abstract
The emerging field of organic bioelectronics bridges the electronic world of organic-semiconductor-based devices with the soft, predominantly ionic world of biology. This crosstalk can occur in both directions. For example, a biochemical reaction may change the doping state of an organic material, generating an electronic readout. Conversely, an electronic signal from a device may stimulate a biological event. Cutting-edge research in this field results in the development of a broad variety of meaningful applications, from biosensors and drug delivery systems to health monitoring devices and brain-machine interfaces. Conjugated polymers share similarities in chemical "nature" with biological molecules and can be engineered on various forms, including hydrogels that have Young's moduli similar to those of soft tissues and are ionically conducting. The structure of organic materials can be tuned through synthetic chemistry, and their biological properties can be controlled using a variety of functionalization strategies. Finally, organic electronic materials can be integrated with a variety of mechanical supports, giving rise to devices with form factors that enable integration with biological systems. While these developments are innovative and promising, it is important to note that the field is still in its infancy, with many unknowns and immense scope for exploration and highly collaborative research. The first part of this Account details the unique properties that render conjugated polymers excellent biointerfacing materials. We then offer an overview of the most common conjugated polymers that have been used as active layers in various organic bioelectronics devices, highlighting the importance of developing new materials. These materials are the most popular ethylenedioxythiophene derivatives as well as conjugated polyelectrolytes and ion-free organic semiconductors functionalized for the biological interface. We then discuss several applications and operation principles of state-of-the-art bioelectronics devices. These devices include electrodes applied to sense/trigger electrophysiological activity of cells as well as electrolyte-gated field-effect and electrochemical transistors used for sensing of biochemical markers. Another prime application example of conjugated polymers is cell actuators. External modulation of the redox state of the underlying conjugated polymer films controls the adhesion behavior and viability of cells. These smart surfaces can be also designed in the form of three-dimensional architectures because of the processability of conjugated polymers. As such, cell-loaded scaffolds based on electroactive polymers enable integrated sensing or stimulation within the engineered tissue itself. A last application example is organic neuromorphic devices, an alternative computing architecture that takes inspiration from biology and, in particular, from the way the brain works. Leveraging ion redistribution inside a conjugated polymer upon application of an electrical field and its coupling with electronic charges, conjugated polymers can be engineered to act as artificial neurons or synapses with complex, history-dependent behavior. We conclude this Account by highlighting main factors that need to be considered for the design of a conjugated polymer for applications in bioelectronics-although there can be various figures of merit given the broad range of applications, as emphasized in this Account.
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Affiliation(s)
- Sahika Inal
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Jonathan Rivnay
- Department of Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, United States
- Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, Illinois 60611, United States
| | - Andreea-Otilia Suiu
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, U.K
| | - George G. Malliaras
- Electrical Engineering Division, Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, U.K
| | - Iain McCulloch
- Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, U.K
- Physical Sciences and Engineering Division, KAUST Solar Center, KAUST, Thuwal 23955-6900, Kingdom of Saudi Arabia
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50
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Veerla SC, Kim DR, Yang SY. Fabrication of a microfluidic device for studying the in situ drug-loading/release behavior of graphene oxide-encapsulated hydrogel beads. Biomater Res 2018; 22:7. [PMID: 29564150 PMCID: PMC5851251 DOI: 10.1186/s40824-018-0119-9] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 02/28/2018] [Indexed: 11/10/2022] Open
Abstract
Background Controlled drug delivery system is highly important for not only prolonged the efficacy of drug but also cellular development for tissue engineering. A number of biopolymer composites and nanostructured carriers behave been used for the controlled drug delivery of therapeutics. Recently, in vitro microfluidic devices that mimic the human body have been developed for drug-delivery applications. Methods A microfluidic channel was fabricated via a two-step process: (i) polydimethyl siloxane (PDMS) and curing agent were poured with a 10:2 mass ratio onto an acrylic mold with two steel pipes, and (ii) calcium alginate beads were synthesized using sodium alginate and calcium chloride solutions. Different amounts (10, 25, 50 μg) of graphene oxide (GO) were then added by Hummers method, and studies on the encapsulation and release of the model drug, risedronate (Ris), were performed using control hydrogel beads (pH 6.3), GO-containing beads (10GO, 25GO and 50GO), and different pH conditions. MC3T3 osteoblastic cells were cultured in a microchannel with Ris-loaded GO-hydrogel beads, and their proliferation, viability, attachment and spreading were assessed for a week. Results The spongy and textured morphology of pristine hydrogel beads was converted to flowery and rod-shaped structures in drug-loaded hydrogel beads at reduced pH (6.3) and at a lower concentration (10 μg) of GO. These latter 10GO drug-loaded beads rapidly released their cargo owing to the calcium phosphate deposited on the surface. Notably, beads containing a higher amount of GO (50GO) exhibited an extended drug-release profile. We further found that MC3T3 cells proliferated continuously in vitro in the microfluidic channel containing the GO-hydrogel system. MTT and live/dead assays showed similar proliferative potential of MC3T3 cells. Therefore, a microfluidic device with microchannels containing hydrogel beads formulated with different amounts of GO and tested under various pH conditions could be a promising system for controlled drug release. Conclusions The GO and drug (risedronate, Rig) were directed loaded into a hydrogel placed in a microchannel. Through interactions such as hydrogen bonding between Go and the Rig-loaded GO-hydrogel beads, the bead-loaded microfluidic device supported MC3T3 proliferation and development as osteoblast without additional osteogenic differentiation supplements.
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Affiliation(s)
- Sarath Chandra Veerla
- Department of Organic Materials Engineering, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon, 34134 Korea
| | - Da Reum Kim
- Department of Organic Materials Engineering, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon, 34134 Korea
| | - Sung Yun Yang
- Department of Organic Materials Engineering, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon, 34134 Korea
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