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Yan Z, Yao M, Zhao Z, Yang Q, Liu R, Liu B, Wang X, Chen L, Zhang H, Wei Y, Yao F, Li J. Mechanical-Enhanced and Durable Zwitterionic Hydrogel Coating for Inhibiting Coagulation and Reducing Bacterial Infection. Adv Healthc Mater 2024; 13:e2400126. [PMID: 38768441 DOI: 10.1002/adhm.202400126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 05/11/2024] [Indexed: 05/22/2024]
Abstract
Blood-contact medical devices are indispensable for clinical interventions, yet their susceptibility to thrombosis and bacterial infections poses substantial risks to treatment efficacy and patient well-being. This study introduces a polysulfobetaine/alginate-CuII (SAC) zwitterionic hydrogel coating on polyurethane (PU) surfaces. This approach retains the superhydrophilic and antifouling nature of pSBMA while conferring the antibacterial effects of copper ions. Meanwhile, the copper alginate network intertwines with the polysulfobetaine (pSBMA) network, enhancing its mechanical properties and overcoming inherent weaknesses, thereby improving coating durability. Compared to the substrate, the SAC hydrogel coating significantly reduces thrombus adhesion mass by approximately 81.5% during extracorporeal blood circulation and effectively prevents bacterial biofilm formation even in a high-concentration bacterial milieu over 30 days. Moreover, the results from an isolated blood circulation model in New Zealand white rabbits affirm the impressive anticoagulant efficacy of the SAC hydrogel coating. The findings suggest that this hydrogel coating and its application method hold promise as a solution for blood-contact material surface modification to address thrombosis and bacterial biofilm formation simultaneously.
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Affiliation(s)
- Zhuojun Yan
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Mengmeng Yao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
- Biomedical Engineering Cockrell School of Engineering, University of Texas at Austin, Austin, TX, 78712, USA
| | - Zhongming Zhao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Qi Yang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Rui Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Baijun Liu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Xueyu Wang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Liming Chen
- Department of Anorectal Surgery, Tianjin Hospital, Tianjin University, Tianjin, 300211, China
| | - Hong Zhang
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, China
| | - Yuping Wei
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 300350, China
| | - Fanglian Yao
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, China
| | - Junjie Li
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin, 300350, China
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2
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Sun Z, Yin Y, Liu B, Xue T, Zou Q. Amphibious Multifunctional Hydrogel Flexible Haptic Sensor with Self-Compensation Mechanism. SENSORS (BASEL, SWITZERLAND) 2024; 24:3232. [PMID: 38794086 PMCID: PMC11125873 DOI: 10.3390/s24103232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 05/11/2024] [Accepted: 05/16/2024] [Indexed: 05/26/2024]
Abstract
In recent years, hydrogel-based wearable flexible electronic devices have attracted much attention. However, hydrogel-based sensors are affected by structural fatigue, material aging, and water absorption and swelling, making stability and accuracy a major challenge. In this study, we present a DN-SPEZ dual-network hydrogel prepared using polyvinyl alcohol (PVA), sodium alginate (SA), ethylene glycol (EG), and ZnSO4 and propose a self-calibration compensation strategy. The strategy utilizes a metal salt solution to adjust the carrier concentration of the hydrogel to mitigate the resistance drift phenomenon to improve the stability and accuracy of hydrogel sensors in amphibious scenarios, such as land and water. The ExpGrow model was used to characterize the trend of the ∆R/R0 dynamic response curves of the hydrogels in the stress tests, and the average deviation of the fitted curves ϵ¯ was calculated to quantify the stability differences of different groups. The results showed that the stability of the uncompensated group was much lower than that of the compensated group utilizing LiCl, NaCl, KCl, MgCl2, and AlCl3 solutions (ϵ¯ in the uncompensated group in air was 276.158, 1.888, 2.971, 30.586, and 13.561 times higher than that of the compensated group in LiCl, NaCl, KCl, MgCl2, and AlCl3, respectively; ϵ¯ in the uncompensated group in seawater was 10.287 times, 1.008 times, 1.161 times, 4.986 times, 1.281 times, respectively, higher than that of the compensated group in LiCl, NaCl, KCl, MgCl2 and AlCl3). In addition, for the ranking of the compensation effect of different compensation solutions, the concentration of the compensation solution and the ionic radius and charge of the cation were found to be important factors in determining the compensation effect. Detection of events in amphibious environments such as swallowing, robotic arm grasping, Morse code, and finger-wrist bending was also performed in this study. This work provides a viable method for stability and accuracy enhancement of dual-network hydrogel sensors with strain and pressure sensing capabilities and offers solutions for sensor applications in both airborne and underwater amphibious environments.
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Affiliation(s)
- Zhenhao Sun
- School of Microelectronics, Tianjin University, Tianjin 300072, China; (Z.S.); (Y.Y.); (B.L.)
| | - Yunjiang Yin
- School of Microelectronics, Tianjin University, Tianjin 300072, China; (Z.S.); (Y.Y.); (B.L.)
| | - Baoguo Liu
- School of Microelectronics, Tianjin University, Tianjin 300072, China; (Z.S.); (Y.Y.); (B.L.)
| | - Tao Xue
- Center of Analysis and Testing Facilities, Tianjin University, Tianjin 300072, China;
| | - Qiang Zou
- School of Microelectronics, Tianjin University, Tianjin 300072, China; (Z.S.); (Y.Y.); (B.L.)
- Tianjin International Joint Research Center for Internet of Things, Tianjin 300072, China
- Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology, Tianjin University, Tianjin 300072, China
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3
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Jarosińska E, Zambrowska Z, Witkowska Nery E. Methods of Protection of Electrochemical Sensors against Biofouling in Cell Culture Applications. ACS OMEGA 2024; 9:4572-4580. [PMID: 38313548 PMCID: PMC10831843 DOI: 10.1021/acsomega.3c07660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/28/2023] [Accepted: 12/01/2023] [Indexed: 02/06/2024]
Abstract
In this work, we evaluated more than 10 antifouling layers presenting different modes of action for application in electrochemical sensors. These layers included porous materials, permselective membranes, hydrogels, silicate sol-gels, proteins, and sp3 hybridized carbon. To evaluate the protective effects of the antifouling modification as well as its impact on the catalyst, we adsorbed a redox mediator on the electrode surface. Five of the tested coatings allowed us to preserve the electrochemical properties of the tested mediator. Later studies showed that sol-gel silicate layer, poly-l-lactic acid, and poly(l-lysine)-g-poly(ethylene glycol) were the only ones capable of sustaining the catalyst's performance during prolonged incubation in a cell culture medium. The highest signal deterioration was observed, as expected during the first few hours of incubation in a cell culture environment. Tested layers exhibited different dynamics of the protective effect. The poly-l-lactic acid layer presented lower changes in the first hours of the study but suffered complete signal deterioration after 72 h. Whereas the signal intensity of the silicate layer was lowered by half after just 3 h but was still visible after 6 weeks of constant incubation of the electrode in the cell culture.
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Affiliation(s)
- Elżbieta Jarosińska
- Institute of Physical Chemistry,
Polish Academy of Sciences, Warsaw, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland
| | | | - Emilia Witkowska Nery
- Institute of Physical Chemistry,
Polish Academy of Sciences, Warsaw, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland
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4
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Jayakumar K, Lielpetere A, Domingo-Lopez DA, Levey RE, Duffy GP, Schuhmann W, Leech D. Tethering zwitterionic polymer coatings to mediated glucose biosensor enzyme electrodes can decrease sensor foreign body response yet retain sensor sensitivity to glucose. Biosens Bioelectron 2023; 219:114815. [PMID: 36302333 DOI: 10.1016/j.bios.2022.114815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 10/02/2022] [Accepted: 10/11/2022] [Indexed: 11/07/2022]
Abstract
Foreign body response (FBR) is a major challenge that affects implantable biosensors and medical devices, including glucose biosensors, leading to a deterioration in device response over time. Polymer shields are often used to mitigate this issue. Zwitterionic polymers (ZPs) are a promising class of materials that reduce biofouling of implanted devices. A series of ZPs each containing tetherable epoxide functional groups was synthesised for application as a polymer shield for eventual application as implantable glucose biosensors. The polymer shields were initially tested for the ability to resist fibrinogen adsorption and fibroblast adhesion. All synthesised ZPs showed comparable behaviour to a commercial Lipidure ZP in resisting fibrinogen adsorption. Nafion, a common anionic shield used against electrochemical interferents, showed higher protein adsorption and comparable cell adhesion resistance as uncoated control surfaces. However, a poly(2-methacryloyloxyethyl phosphorylcholine-co-glycidyl methacrylate) (MPC)-type ZP showed similar behaviour to Lipidure, with approximately 50% reduced fibrinogen adsorption and 80% decrease in fibroblast adhesion compared to uncoated controls. An MPC-coated amperometric glucose biosensor showed comparable current density and a 1.5-fold increase in sensitivity over an uncoated control biosensor, whereas all other polymer shields tested, including Lipidure, Nafion and a poly(ethyleneglycol) polymer, resulted in lower sensitivity and current density. Collectively, these characteristics make MPC-polymer shield coatings an appealing possibility for use in implantable glucose sensors and other implanted devices with the aim of reducing FBR while maintaining sensor performance.
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Affiliation(s)
- Kavita Jayakumar
- School of Biological & Chemical Sciences, University of Galway, University Road, Galway, H91 TK33, Ireland
| | - Anna Lielpetere
- Analytical Chemistry-Center for Electrochemical Sciences, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, 44780, Bochum, Germany
| | - Daniel A Domingo-Lopez
- Anatomy and Regenerative Medicine Institute (REMEDI), School of Medicine, College of Medicine Nursing and Health Sciences, University of Galway, University Road, ,Galway, H91 TK33, Ireland
| | - Ruth E Levey
- Anatomy and Regenerative Medicine Institute (REMEDI), School of Medicine, College of Medicine Nursing and Health Sciences, University of Galway, University Road, ,Galway, H91 TK33, Ireland
| | - Garry P Duffy
- Anatomy and Regenerative Medicine Institute (REMEDI), School of Medicine, College of Medicine Nursing and Health Sciences, University of Galway, University Road, ,Galway, H91 TK33, Ireland
| | - Wolfgang Schuhmann
- Analytical Chemistry-Center for Electrochemical Sciences, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstr. 150, 44780, Bochum, Germany.
| | - Dónal Leech
- School of Biological & Chemical Sciences, University of Galway, University Road, Galway, H91 TK33, Ireland.
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5
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Hachimi Alaoui C, Fatimi A. A 20-year patent review and innovation trends on hydrogel-based coatings used for medical device biofabrication. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2022:1-19. [PMID: 36542377 DOI: 10.1080/09205063.2022.2161777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This patent review encapsulates information that could be used as a reference by researchers in the fields of coatings and interfaces, biofabrication, tissue engineering, biomaterials, and biomedical engineering, as well as those especially interested in the formulation of hydrogel coatings. The state has been reviewed by introducing what has been innovated, invented, and patented in relation to hydrogel coatings. A detailed analysis of the patentability of hydrogel applications, such as the coating of medical devices to enhance their clinical performance, has been provided. During a search, 2937 patent documents were found. 2012 was the year with the most patent documents (177). Based on the patent classification, all patent documents and most inventions are intended for biomaterials for coating prostheses characterized by their function or physical properties, such as macromolecular materials, hydrogels, and biologically active materials. Additionally, research based on medicinal formulations with unique physical forms is concentrated in the majority of patents, according to knowledge clusters and expert driving factors. Finally, to demonstrate the innovation trends in hydrogel-based coatings, a selection of relevant patent applications and granted patents is proposed at the end of this paper, along with some examples of commercial products based on the patented technologies.
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Affiliation(s)
- Chaymaa Hachimi Alaoui
- Chemical Science and Engineering Research Team (ERSIC), Department of Chemistry, Polydisciplinary Faculty of Beni Mellal (FPBM), Sultan Moulay Slimane University (USMS), Mghila, Beni Mellal, Morocco
| | - Ahmed Fatimi
- Chemical Science and Engineering Research Team (ERSIC), Department of Chemistry, Polydisciplinary Faculty of Beni Mellal (FPBM), Sultan Moulay Slimane University (USMS), Mghila, Beni Mellal, Morocco
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6
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Su D, Bai X, He X. Research progress on hydrogel materials and their antifouling properties. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Shchapova E, Titov E, Gurkov A, Nazarova A, Borvinskaya E, Timofeyev M. Durability of Implanted Low-Density Polyacrylamide Hydrogel Used as a Scaffold for Microencapsulated Molecular Probes inside Small Fish. Polymers (Basel) 2022; 14:polym14193956. [PMID: 36235907 PMCID: PMC9573640 DOI: 10.3390/polym14193956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 01/19/2023] Open
Abstract
Implantable sensors based on shaped biocompatible hydrogels are now being extensively developed for various physiological tasks, but they are usually difficult to implant into small animals. In this study, we tested the long-term in vivo functionality of pH-sensitive implants based on amorphous 2.7% polyacrylamide hydrogel with the microencapsulated fluorescent probe SNARF-1. The sensor was easy to manufacture and introduce into the tissues of a small fish Danio rerio, which is the common model object in biomedical research. Histological examination revealed partial degradation of the gel by the 7th day after injection, but it was not the case on the 1st day. Using the hydrogel sensor, we were able to trace the interstitial pH in the fish muscles under normal and hypercapnic conditions for at least two days after the implantation. Thus, despite later immune response, amorphous polyacrylamide is fully suitable for preparing implantable sensors for various mid-term physiological experiments on small fishes. The proposed approach can be further developed to create implantable sensors for animals with similar anatomy.
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Affiliation(s)
- Ekaterina Shchapova
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia
- Baikal Research Centre, 664003 Irkutsk, Russia
| | - Evgeniy Titov
- East Siberian Institute of Medical and Ecological Research, 665827 Angarsk, Russia
| | - Anton Gurkov
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia
- Baikal Research Centre, 664003 Irkutsk, Russia
| | - Anna Nazarova
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia
| | | | - Maxim Timofeyev
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia
- Correspondence:
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8
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You Y, Zou J, Li WJ, Chen J, Jiang XY, Yu JG. Novel lanthanum vanadate-based nanocomposite for simultaneously electrochemical detection of dopamine and uric acid in fetal bovine serum. Int J Biol Macromol 2022; 195:346-355. [PMID: 34920056 DOI: 10.1016/j.ijbiomac.2021.12.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/07/2021] [Accepted: 12/08/2021] [Indexed: 01/01/2023]
Abstract
The abnormal levels of two biological molecules, dopamine (DA) and Uric acid (UA), in human body are symptoms of diseases such as Parkinson's disease and arrhythmia. A novel lanthanum vanadate and multi-walled carbon nanotubes (LaV-MWCNTs) composite modified glassy carbon electrode (GCE) was developed and utilized as an efficient electrochemical sensor for the simultaneous detection of DA and UA. LaV-MWCNTs composite was successfully fabricated by a facile ultrasonic self-assembly method and identified by means of a series of successive measurements including XPS, XRD, FT-IR and FE-SEM. The LaV-MWCNTs modified GCE shows the concentration linear ranges of DA and UA are 2-100 μΜ using DPV. The limits of detection (LODs; signal-to-noise ratio of 3, S/N = 3) of the LaV-MWCNTs modified GCE sensor for DA and UA were calculated to be 0.046 μM and 0.025 μM, respectively. The feasibility of using the LaV-MWCNTs modified GCE sensor to detect DA and UA in a typical biological fluid, fetal bovine serum, was also evaluated by the standard addition method.
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Affiliation(s)
- Ya You
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Jiao Zou
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Wen-Jie Li
- Xiangya School of Stomatology & Xiangya Stomatological Hospital, Central South University, Changsha, Hunan 410008, China
| | - Jun Chen
- Xiangya School of Stomatology & Xiangya Stomatological Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xin-Yu Jiang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China
| | - Jin-Gang Yu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China.
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Dong P, Singh KA, Soltes AM, Ko BS, Gaharwar AK, McShane MJ, Grunlan MA. Silicone-containing thermoresponsive membranes to form an optical glucose biosensor. J Mater Chem B 2022; 10:6118-6132. [DOI: 10.1039/d2tb01192a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Glucose biosensors that could be subcutaneously injected and interrogated without a physically connected electrode and transmitter affixed to skin would represent a major advancement in reducing the user burden of...
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Mohapatra S, Mirza MA, Hilles AR, Zakir F, Gomes AC, Ansari MJ, Iqbal Z, Mahmood S. Biomedical Application, Patent Repository, Clinical Trial and Regulatory Updates on Hydrogel: An Extensive Review. Gels 2021; 7:207. [PMID: 34842705 PMCID: PMC8628667 DOI: 10.3390/gels7040207] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 10/15/2021] [Accepted: 11/08/2021] [Indexed: 12/13/2022] Open
Abstract
Hydrogels are known for their leading role in biomaterial systems involving pharmaceuticals that fascinate material scientists to work on the wide variety of biomedical applications. The physical and mechanical properties of hydrogels, along with their biodegradability and biocompatibility characteristics, have made them an attractive and flexible tool with various applications such as imaging, diagnosis and treatment. The water-cherishing nature of hydrogels and their capacity to swell-contingent upon a few ecological signals or the simple presence of water-is alluring for drug conveyance applications. Currently, there are several problems relating to drug delivery, to which hydrogel may provide a possible solution. Hence, it is pertinent to collate updates on hydrogels pertaining to biomedical applications. The primary objective of this review article is to garner information regarding classification, properties, methods of preparations, and of the polymers used with particular emphasis on injectable hydrogels. This review also covers the regulatory and other commerce specific information. Further, it enlists several patents and clinical trials of hydrogels with related indications and offers a consolidated resource for all facets associated with the biomedical hydrogels.
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Affiliation(s)
- Sradhanjali Mohapatra
- Department of Pharmaceutics, School of Pharmaceutics Education and Research (SPER), Jamia Hamdard, New Delhi 110062, India; (S.M.); (M.A.M.)
| | - Mohd. Aamir Mirza
- Department of Pharmaceutics, School of Pharmaceutics Education and Research (SPER), Jamia Hamdard, New Delhi 110062, India; (S.M.); (M.A.M.)
| | - Ayah Rebhi Hilles
- International Institute for Halal Research and Training (INHART), International Islamic University Malaysia, Kuala Lumpur 53100, Malaysia;
| | - Foziyah Zakir
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Delhi Pharmaceutical Sciences and Research University, New Delhi 110017, India;
| | - Andreia Castro Gomes
- Centre of Molecular and Environmental Biology (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal;
- Institute of Science and Innovation for Bio-Sustainability (IB-S), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Mohammad Javed Ansari
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi Arabia;
| | - Zeenat Iqbal
- Department of Pharmaceutics, School of Pharmaceutics Education and Research (SPER), Jamia Hamdard, New Delhi 110062, India; (S.M.); (M.A.M.)
| | - Syed Mahmood
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Universiti Malaya, Kuala Lumpur 50603, Malaysia
- Centre for Natural Products Research and Drug Discovery (CENAR), Universiti Malaya, Kuala Lumpur 50603, Malaysia
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Kotturi D, Paterson S, McShane M. Comparison of SERS pH probe responses after microencapsulation within hydrogel matrices. JOURNAL OF BIOMEDICAL OPTICS 2021; 26:JBO-210153R. [PMID: 34519190 PMCID: PMC8435981 DOI: 10.1117/1.jbo.26.9.097001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 08/27/2021] [Indexed: 06/13/2023]
Abstract
SIGNIFICANCE Personalized medicine requires the tracking of an individual's metabolite levels over time to detect anomalies and evaluate the body's response to medications. Implanted sensors offer effective means to continuously monitor specific metabolite levels, provided they are accurate, stable over long time periods, and do no harm. AIM Four types of hydrogel embedded with pH-sensitive sensors were evaluated for their accuracy, sensitivity, reversibility, longevity, dynamic response, and consistency in static versus dynamic conditions and long-term storage. APPROACH Raman spectroscopy was first used to calibrate the intensity of pH-sensitive peaks of the Raman-active hydrogel sensors in a static pH environment. The dynamic response was then assessed for hydrogels exposed to changing pH conditions within a flow cell. Finally, the static pH response after 5 months of storage was determined. RESULTS All four types of hydrogels allowed the surface-enhanced Raman spectroscopy (SERS) sensors to respond to the pH level of the local environment without introducing interfering signals, resulting in consistent calibration curves. When the pH level changed, the probes in the gels were slow to reach steady-state, requiring several hours, and response times were found to vary among hydrogels. Only one type, poly(2-hydroxyethyl methacrylate) (pHEMA), lasted five months without significant degradation of dynamic range. CONCLUSIONS While all hydrogels appear to be viable candidates as biocompatible hosts for the SERS sensing chemistry, pHEMA was found to be most functionally stable over the long interval tested. Poly(ethylene glycol) hydrogels exhibit the most rapid response to changing pH. Since these two gel types are covalently cross-linked and do not generally degrade, they both offer advantages over sodium alginate for use as implants.
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Affiliation(s)
- Dayle Kotturi
- Texas A&M University, Department of Biomedical Engineering, College Station, Texas, United States
| | - Sureyya Paterson
- Texas A&M University, Department of Biomedical Engineering, College Station, Texas, United States
| | - Mike McShane
- Texas A&M University, Department of Biomedical Engineering, College Station, Texas, United States
- Texas A&M University, Department of Materials Science and Engineering, College Station, Texas, United States
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12
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Feng R, Chu Y, Wang X, Wu Q, Tang F. A long-term stable and flexible glucose sensor coated with poly(ethylene glycol)-modified polyurethane. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Artigues M, Gilabert-Porres J, Texidó R, Borrós S, Abellà J, Colominas S. Analytical Parameters of a Novel Glucose Biosensor Based on Grafted PFM as a Covalent Immobilization Technique. SENSORS (BASEL, SWITZERLAND) 2021; 21:4185. [PMID: 34207185 PMCID: PMC8235154 DOI: 10.3390/s21124185] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/31/2021] [Accepted: 06/15/2021] [Indexed: 12/17/2022]
Abstract
Bioanalytical methods, in particular electrochemical biosensors, are increasingly used in different industrial sectors due to their simplicity, low cost, and fast response. However, to be able to reliably use this type of device, it is necessary to undertake in-depth evaluation of their fundamental analytical parameters. In this work, analytical parameters of an amperometric biosensor based on covalent immobilization of glucose oxidase (GOx) were evaluated. GOx was immobilized using plasma-grafted pentafluorophenyl methacrylate (pgPFM) as an anchor onto a tailored HEMA-co-EGDA hydrogel that coats a titanium dioxide nanotubes array (TiO2NTAs). Finally, chitosan was used to protect the enzyme molecules. The biosensor offered outstanding analytical parameters: repeatability (RSD = 1.7%), reproducibility (RSD = 1.3%), accuracy (deviation = 4.8%), and robustness (RSD = 2.4%). In addition, the Ti/TiO2NTAs/ppHEMA-co-EGDA/pgPFM/GOx/Chitosan biosensor showed good long-term stability; after 20 days, it retained 89% of its initial sensitivity. Finally, glucose concentrations of different food samples were measured and compared using an official standard method (HPLC). Deviation was lower than 10% in all measured samples. Therefore, the developed biosensor can be considered to be a reliable analytical tool for quantification measurements.
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Affiliation(s)
- Margalida Artigues
- Electrochemical Methods Laboratory-Analytical and Applied Chemistry Department at Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta, 390, 08017 Barcelona, Spain; (M.A.); (J.A.)
| | - Joan Gilabert-Porres
- Tractivus SL, Via Augusta, 394, 08017 Barcelona, Spain; (J.G.-P.); (R.T.); (S.B.)
- Grup d’Enginyeria de Materials (GEMAT) at Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta, 390, 08017 Barcelona, Spain
| | - Robert Texidó
- Tractivus SL, Via Augusta, 394, 08017 Barcelona, Spain; (J.G.-P.); (R.T.); (S.B.)
- Grup d’Enginyeria de Materials (GEMAT) at Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta, 390, 08017 Barcelona, Spain
| | - Salvador Borrós
- Tractivus SL, Via Augusta, 394, 08017 Barcelona, Spain; (J.G.-P.); (R.T.); (S.B.)
- Grup d’Enginyeria de Materials (GEMAT) at Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta, 390, 08017 Barcelona, Spain
- CIBER-BBN, Networking Center on Bioengineering, Biomaterials and Nanomedicine, 500018 Zaragoza, Spain
| | - Jordi Abellà
- Electrochemical Methods Laboratory-Analytical and Applied Chemistry Department at Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta, 390, 08017 Barcelona, Spain; (M.A.); (J.A.)
| | - Sergi Colominas
- Electrochemical Methods Laboratory-Analytical and Applied Chemistry Department at Institut Químic de Sarrià, Universitat Ramon Llull, Via Augusta, 390, 08017 Barcelona, Spain; (M.A.); (J.A.)
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14
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Bhave G, Chen JC, Singer A, Sharma A, Robinson JT. Distributed sensor and actuator networks for closed-loop bioelectronic medicine. MATERIALS TODAY (KIDLINGTON, ENGLAND) 2021; 46:125-135. [PMID: 34366697 PMCID: PMC8336425 DOI: 10.1016/j.mattod.2020.12.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Designing implantable bioelectronic systems that continuously monitor physiological functions and simultaneously provide personalized therapeutic solutions for patients remains a persistent challenge across many applications ranging from neural systems to bioelectronic organs. Closed-loop systems typically consist of three functional blocks, namely, sensors, signal processors and actuators. An effective system, that can provide the necessary therapeutics, tailored to individual physiological factors requires a distributed network of sensors and actuators. While significant progress has been made, closed-loop systems still face many challenges before they can truly be considered as long-term solutions for many diseases. In this review, we consider three important criteria where materials play a critical role to enable implantable closed-loop systems: Specificity, Biocompatibility and Connectivity. We look at the progress made in each of these fields with respect to a specific application and outline the challenges in creating bioelectronic technologies for the future.
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15
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Xia J, Sonkusale S. Flexible thread-based electrochemical sensors for oxygen monitoring. Analyst 2021; 146:2983-2990. [PMID: 33949371 DOI: 10.1039/d0an02400g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Oxygen plays a key role in human physiology and is abnormally modulated in various disease pathologies making its in situ monitoring quite important. Most oxygen sensors are not able to measure oxygen levels deep inside the tissue or have mismatched electrode-tissue interfaces. In this study we developed a flexible thread-based oxygen sensor that combines the unique advantages of minimal invasiveness and superior flexibility offering the possibility for tissue integration. The sensor is featured by a simple and low-cost fabrication approach which allows for measuring the overall oxygen concentration either over a large surface area or locally at any spot in any three-dimensional environment with high spatial accuracy and high sensitivity. The sensor can sensitively detect dissolved oxygen levels within the physiological range of tissue oxygenation. The sensor's performance is insensitive to pH variation from 5.8 to 8.0. The sensor shows good repeatability and stability over a period of one week in phosphate buffered saline. In addition, the signal variation is less than 10% after hundreds of cycles of physical bending. Using a hydrogel-based tissue model the sensor has been shown to probe dissolved oxygen levels at different spatial locations inside a tissue-like environment.
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Affiliation(s)
- Junfei Xia
- Department of Electrical and Computer Engineering, Tufts University, Medford, MA 02155, USA. and Nano Lab, Advanced Technology Laboratory, Tufts University, Medford, MA 02155, USA
| | - Sameer Sonkusale
- Department of Electrical and Computer Engineering, Tufts University, Medford, MA 02155, USA. and Nano Lab, Advanced Technology Laboratory, Tufts University, Medford, MA 02155, USA
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16
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Kafi AKM, Bin Kasri A, Jose R. Glucose Biosensor Based on Glucose Oxidase-Horseradish Peroxidase/Multiporous Tin Oxide (SnO₂) Modified Electrode. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2021; 21:3059-3064. [PMID: 33653480 DOI: 10.1166/jnn.2021.19283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The fabrication of a network of glucose oxidase-horseradish peroxidase/tin oxide (GOx-HRP/SnO₂), immobilized onto a glassy carbon electrode (GCE) and its utilization as a biosensor for glucose detection is reported. The network established with GOx-HRP/SnO₂ possess high sensitivity and stability by performing the electrocatalytic features in the sensing of glucose. The turbidity of fabrication had been scanned and analyzed using UV-vis spectroscopy. The morphology and composition of the fabricated GOx-HRP/SnO₂ networks were characterized by scanning electron microscopy (SEM). Cyclic voltammetry and amperometry were employed to study the electrochemical properties of the proposed biosensor. The effect of applied electrode potential and pH were systemically investigated. The biosensor responds to glucose at work potential values between -400 mV, and exhibited a lower detection limit (0.025 mM) and long linear range (0.25 to 7.0 mM), and was resistant to common interferences.
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Affiliation(s)
- A K M Kafi
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Kuantan 26300, Malaysia
| | - Aizam Bin Kasri
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Kuantan 26300, Malaysia
| | - Rajan Jose
- Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, Kuantan 26300, Malaysia
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17
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Malone-Povolny MJ, Bradshaw TM, Merricks EP, Long CT, Nichols TC, Schoenfisch MH. Combination of Nitric Oxide Release and Surface Texture for Mitigating the Foreign Body Response. ACS Biomater Sci Eng 2021; 7:2444-2452. [PMID: 33848421 DOI: 10.1021/acsbiomaterials.1c00022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The tissue response to polyurethane (PU)-coated implants employing active and/or passive FBR mitigation techniques was evaluated over a 28 day study in a diabetic swine model. Active FBR mitigation was achieved through the sustained release of nitric oxide (NO) from a mesoporous silica nanoparticle-doped PU coating. Passive FBR mitigation was achieved through the application of a foam- or fiber-based topcoat. These topcoats were designed to possess topographical features known to promote tissue integration with foam-coated implants having pore sizes of approximately 50 μm and fiber-coated implants consisting of fiber diameters of less than 1 μm. Nitric oxide-release profiles were minimally impacted by the presence of either topcoat. Inflammatory cell density and collagen density at the implant-tissue interface were assessed at 7, 14, 21, and 28 days following implantation. Nitric oxide-releasing implants had significantly lower inflammatory cell density and collagen density than non-NO-releasing controls. The presence of a topcoat did not significantly impact inflammatory cell density, though top-coated textured implants resulted in significantly lower collagen density, irrespective of NO release. Overall, coatings that combine NO release with surface texture demonstrated the greatest potential for tissue-based biomedical device applications.
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Affiliation(s)
- Maggie J Malone-Povolny
- Department of Chemistry, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - Taron M Bradshaw
- Department of Chemistry, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - Elizabeth P Merricks
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - C Tyler Long
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - Timothy C Nichols
- Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
| | - Mark H Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, CB3290, Chapel Hill, North Carolina 27599, United States
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18
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Choi HK, Lee JH, Lee T, Lee SN, Choi JW. Flexible Electronics for Monitoring in vivo Electrophysiology and Metabolite Signals. Front Chem 2020; 8:547591. [PMID: 33330353 PMCID: PMC7710703 DOI: 10.3389/fchem.2020.547591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 10/07/2020] [Indexed: 11/13/2022] Open
Abstract
Numerous efforts have been made to develop efficient biosensors for detecting analytes in the human body. However, biosensors are often developed on rigid materials, which limits their application on skin, organs, and other tissues in the human body where good flexibility is required. Developing flexible materials for biosensors that can be used on soft and irregularly shaped surfaces would significantly expand the clinical application of biosensors. In this review, we will provide a selective overview of recently developed flexible electronic devices and their applications for monitoring in vivo metabolite and electrophysiology signals. The article provides guidelines for the development of an in vivo signal monitoring system and emphasizes research from various disciplines for the further development of flexible electronics that can be used in more biomedical applications in the future.
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Affiliation(s)
- Hye Kyu Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, South Korea
| | - Jin-Ho Lee
- School of Biomedical Convergence Engineering, Pusan National University, Yangsan, South Korea
| | - Taek Lee
- Department of Chemical Engineering, Kwangwoon University, Seoul, South Korea
| | | | - Jeong-Woo Choi
- Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, South Korea
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19
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Liu J, Qu S, Suo Z, Yang W. Functional hydrogel coatings. Natl Sci Rev 2020; 8:nwaa254. [PMID: 34691578 PMCID: PMC8288423 DOI: 10.1093/nsr/nwaa254] [Citation(s) in RCA: 124] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 09/22/2020] [Accepted: 09/23/2020] [Indexed: 12/21/2022] Open
Abstract
Hydrogels—natural or synthetic polymer networks that swell in water—can be made mechanically, chemically and electrically compatible with living tissues. There has been intense research and development of hydrogels for medical applications since the invention of hydrogel contact lenses in 1960. More recently, functional hydrogel coatings with controlled thickness and tough adhesion have been achieved on various substrates. Hydrogel-coated substrates combine the advantages of hydrogels, such as lubricity, biocompatibility and anti-biofouling properties, with the advantages of substrates, such as stiffness, toughness and strength. In this review, we focus on three aspects of functional hydrogel coatings: (i) applications and functions enabled by hydrogel coatings, (ii) methods of coating various substrates with different functional hydrogels with tough adhesion, and (iii) tests to evaluate the adhesion between functional hydrogel coatings and substrates. Conclusions and outlook are given at the end of this review.
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Affiliation(s)
- Junjie Liu
- Center for X-Mechanics, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province and Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China
- State Key Laboratory of Fluid Power and Mechatronic System, Zhejiang University, Hangzhou 310027, China
- Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China
| | - Shaoxing Qu
- Center for X-Mechanics, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province and Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China
- State Key Laboratory of Fluid Power and Mechatronic System, Zhejiang University, Hangzhou 310027, China
| | - Zhigang Suo
- John A. Paulson School of Engineering and Applied Sciences, Kavli Institute for Bionano Science and Technology, Harvard University, Cambridge, MA 02138, USA
| | - Wei Yang
- Center for X-Mechanics, Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province and Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, China
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20
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Abstract
The growing trend for personalized medicine calls for more reliable implantable biosensors that are capable of continuously monitoring target analytes for extended periods (i.e., >30 d). While promising biosensors for various applications are constantly being developed in the laboratories across the world, many struggle to maintain reliable functionality in complex in vivo environments over time. In this review, we explore the impact of various biotic and abiotic failure modes on the reliability of implantable biosensors. We discuss various design considerations for the development of chronically reliable implantable biosensors with a specific focus on strategies to combat biofouling, which is a fundamental challenge for many implantable devices. Briefly, we introduce the process of the foreign body response and compare the in vitro and the in vivo performances of state-of-the-art implantable biosensors. We then discuss the latest development in material science to minimize and delay biofouling including the usage of various hydrophilic, biomimetic, drug-eluting, zwitterionic, and other smart polymer materials. We also explore a number of active anti-biofouling approaches including stimuli-responsive materials and mechanical actuation. Finally, we conclude this topical review with a discussion on future research opportunities towards more reliable implantable biosensors.
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21
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Wang H, Bo X, Zhou M, Guo L. DUT-67 and tubular polypyrrole formed a cross-linked network for electrochemical detection of nitrofurazone and ornidazole. Anal Chim Acta 2020; 1109:1-8. [DOI: 10.1016/j.aca.2020.03.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/22/2020] [Accepted: 03/02/2020] [Indexed: 12/14/2022]
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22
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Design of a Sandwich Hierarchically Porous Membrane with Oxygen Supplement Function for Implantable Glucose Sensor. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10082848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This study aims to develop an oxygen regeneration layer sandwiched between multiple porous polyurethanes (PU) to improve the performance of implantable glucose sensors. Sensors were prepared by coating electrodes with platinum nanoparticles, Nafion, glucose oxidase and sandwich hierarchically porous membrane with an oxygen supplement function (SHPM-OS). The SHPM-OS consisted of a hierarchically porous structure synthesized by polyethylene glycol and PU and a catalase (Cat) layer that was coated between hierarchical membranes and used to balance the sensitivity and linearity of glucose sensors, as well as reduce the influence of oxygen deficiency during monitoring. Compared with the sensitivity and linearity of traditional non-porous (NO-P) sensors (35.95 nA/mM, 0.9987, respectively) and single porous (SGL-P) sensors (45.3 nA /mM, 0.9610, respectively), the sensitivity and linearity of the SHPM-OS sensor was 98.45 nA/mM and 0.9989, respectively, which was more sensitive with higher linearity. The sensor showed a response speed of five seconds and a relative sensitivity of 90% in the first 10 days and remained 78% on day 20. This sensor coated with SHPM-OS achieved rapid responses to changes of glucose concentration while maintaining high linearity for long monitoring times. Thus, it may reduce the difficulty of back-end hardware module development and assist with effective glucose self-management for people with diabetes.
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23
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Kaberova Z, Karpushkin E, Nevoralová M, Vetrík M, Šlouf M, Dušková-Smrčková M. Microscopic Structure of Swollen Hydrogels by Scanning Electron and Light Microscopies: Artifacts and Reality. Polymers (Basel) 2020; 12:E578. [PMID: 32150859 PMCID: PMC7182949 DOI: 10.3390/polym12030578] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 01/29/2020] [Accepted: 01/30/2020] [Indexed: 11/16/2022] Open
Abstract
The exact knowledge of hydrogel microstructure, mainly its pore topology, is a key issue in hydrogel engineering. For visualization of the swollen hydrogels, the cryogenic or high vacuum scanning electron microscopies (cryo-SEM or HVSEM) are frequently used while the possibility of artifact-biased images is frequently underestimated. The major cause of artifacts is the formation of ice crystals upon freezing of the hydrated gel. Some porous hydrogels can be visualized with SEM without the danger of artifacts because the growing crystals are accommodated within already existing primary pores of the gel. In some non-porous hydrogels the secondary pores will also not be formed due to rigid network structure of gels that counteracts the crystal nucleation and growth. We have tested the limits of true reproduction of the hydrogel morphology imposed by the swelling degree and mechanical strength of gels by investigating a series of methacrylate hydrogels made by crosslinking polymerization of glycerol monomethacrylate and 2-hydroxyethyl methacrylate including their interpenetrating networks. The hydrogel morphology was studied using cryo-SEM, HVSEM, environmental scanning electron microscopy (ESEM), laser scanning confocal microscopy (LSCM) and classical wide-field light microscopy (LM). The cryo-SEM and HVSEM yielded artifact-free micrographs for limited range of non-porous hydrogels and for macroporous gels. A true non-porous structure was observed free of artifacts only for hydrogels exhibiting relatively low swelling and high elastic modulus above 0.5 MPa, whereas for highly swollen and/or mechanically weak hydrogels the cryo-SEM/HVSEM experiments resulted in secondary porosity. In this contribution we present several cases of severe artifact formation in PHEMA and PGMA hydrogels during their visualization by cryo-SEM and HVSEM. We also put forward empirical correlation between hydrogel morphological and mechanical parameters and the occurrence and intensity of artifacts.
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Affiliation(s)
- Zhansaya Kaberova
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského náměstí 2, 162 06 Praha 6, Prague, Czech Republic; (Z.K.); (M.N.); (M.V.); (M.Š.)
| | - Evgeny Karpushkin
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia;
| | - Martina Nevoralová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského náměstí 2, 162 06 Praha 6, Prague, Czech Republic; (Z.K.); (M.N.); (M.V.); (M.Š.)
| | - Miroslav Vetrík
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského náměstí 2, 162 06 Praha 6, Prague, Czech Republic; (Z.K.); (M.N.); (M.V.); (M.Š.)
| | - Miroslav Šlouf
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského náměstí 2, 162 06 Praha 6, Prague, Czech Republic; (Z.K.); (M.N.); (M.V.); (M.Š.)
| | - Miroslava Dušková-Smrčková
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského náměstí 2, 162 06 Praha 6, Prague, Czech Republic; (Z.K.); (M.N.); (M.V.); (M.Š.)
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24
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McClatchey PM, McClain ES, Williams IM, Malabanan CM, James FD, Lord PC, Gregory JM, Cliffel DE, Wasserman DH. Fibrotic Encapsulation Is the Dominant Source of Continuous Glucose Monitor Delays. Diabetes 2019; 68:1892-1901. [PMID: 31399432 PMCID: PMC6754243 DOI: 10.2337/db19-0229] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Accepted: 07/17/2019] [Indexed: 01/06/2023]
Abstract
Continuous glucose monitor (CGM) readings are delayed relative to blood glucose, and this delay is usually attributed to the latency of interstitial glucose levels. However, CGM-independent data suggest rapid equilibration of interstitial glucose. This study sought to determine the loci of CGM delays. Electrical current was measured directly from CGM electrodes to define sensor kinetics in the absence of smoothing algorithms. CGMs were implanted in mice, and sensor versus blood glucose responses were measured after an intravenous glucose challenge. Dispersion of a fluorescent glucose analog (2-NBDG) into the CGM microenvironment was observed in vivo using intravital microscopy. Tissue deposited on the sensor and nonimplanted subcutaneous adipose tissue was then collected for histological analysis. The time to half-maximum CGM response in vitro was 35 ± 2 s. In vivo, CGMs took 24 ± 7 min to reach maximum current versus 2 ± 1 min to maximum blood glucose (P = 0.0017). 2-NBDG took 21 ± 7 min to reach maximum fluorescence at the sensor versus 6 ± 6 min in adipose tissue (P = 0.0011). Collagen content was closely correlated with 2-NBDG latency (R = 0.96, P = 0.0004). Diffusion of glucose into the tissue deposited on a CGM is substantially delayed relative to interstitial fluid. A CGM that resists fibrous encapsulation would better approximate real-time deviations in blood glucose.
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Affiliation(s)
- P Mason McClatchey
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Ethan S McClain
- Department of Chemistry, Vanderbilt University, Nashville, TN
| | - Ian M Williams
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | - Carlo M Malabanan
- Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN
| | - Freyja D James
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
| | | | - Justin M Gregory
- Ian M. Burr Division of Pediatric Endocrinology and Diabetes, Vanderbilt University School of Medicine, Nashville, TN
| | - David E Cliffel
- Department of Chemistry, Vanderbilt University, Nashville, TN
| | - David H Wasserman
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN
- Mouse Metabolic Phenotyping Center, Vanderbilt University, Nashville, TN
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25
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Piper A, Alston BM, Adams DJ, Mount AR. Functionalised microscale nanoband edge electrode (MNEE) arrays: the systematic quantitative study of hydrogels grown on nanoelectrode biosensor arrays for enhanced sensing in biological media. Faraday Discuss 2019; 210:201-217. [PMID: 30101263 DOI: 10.1039/c8fd00063h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Nanoelectrodes and nanoelectrode arrays show enhanced diffusion and greater faradaic current densities and signal-to-noise ratios compared to macro and microelectrodes, which can lead to enhanced sensing and detection. One example is the microsquare nanoband edge electrode (MNEE) array system, readily formed through microfabrication and whose quantitative response has been established electroanalytically. Hydrogels have been shown to have applications in drug delivery, tissue engineering, and anti-biofouling; some also have the ability to be grown electrochemically. Here, we combine these two emerging technologies to demonstrate the principles of a hydrogel-coated nanoelectrode array biosensor that is resistant to biofouling. We first electrochemically grow and analyze hydrogels on MNEE arrays. The structure of these gels is shown by imaging to be electrochemically controllable, reproducible and structurally hierarchical. This structure is determined by the MNEE array diffusion fields, consistent with the established hydrogel formation reaction, and varies in structural scale from nano (early time, near electrode growth) to micro (for isolated elements in the array) to macro (when there is array overlap) with distance from the electrode, forming a hydrogel mesh of increasing density on progression from solution to electrode. There is also increased hydrogel structural density observed at electrode corners, attributable to enhanced diffusion. The resulting hydrogel structure can be formed on (and is firmly anchored to/through) an established clinically relevant biosensing layer without compromising detection. It is also shown to be capable, through proof-of-principle model protein studies using bovine serum albumin (BSA), of preventing protein biofouling whilst enabling smaller molecules such as DNA to pass through the hydrogel matrix and be sensed. Together, this demonstrates a method for developing reproducible, quantitative electrochemical nanoelectrode biosensors able to sense selectively in real-world sample matrices through the tuning of their interfacial properties.
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Affiliation(s)
- Andrew Piper
- EaSTCHEM, School of Chemistry, The University of Edinburgh, Joseph Black Building, King's Building's, David Brewster Road, Edinburgh, EH9 3FJ, UK.
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26
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Means AK, Dong P, Clubb FJ, Friedemann MC, Colvin LE, Shrode CA, Coté GL, Grunlan MA. A self-cleaning, mechanically robust membrane for minimizing the foreign body reaction: towards extending the lifetime of sub-Q glucose biosensors. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 30:79. [PMID: 31240399 PMCID: PMC6988489 DOI: 10.1007/s10856-019-6282-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Accepted: 06/17/2019] [Indexed: 06/09/2023]
Abstract
Long-term, subcutaneously implanted continuous glucose biosensors have the potential to improve diabetes management and reduce associated complications. However, the innate foreign body reaction (FBR) both alters the local glucose concentrations in the surrounding tissues and compromises glucose diffusion to the biosensor due to the recruitment of high-metabolizing inflammatory cells and the formation of a dense, collagenous fibrous capsule. Minimizing the FBR has mainly focused on "passively antifouling" materials that reduce initial cellular attachment, including poly(ethylene glycol) (PEG). Instead, the membrane reported herein utilizes an "actively antifouling" or "self-cleaning" mechanism to inhibit cellular attachment through continuous, cyclic deswelling/reswelling in response to normal temperature fluctuations of the subcutaneous tissue. This thermoresponsive double network (DN) membrane is based on N-isopropylacrylamide (NIPAAm) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) (75:25 and 100:0 NIPAAm:AMPS in the 1st and 2nd networks, respectively; "DN-25%"). The extent of the FBR reaction of a subcutaneously implanted DN-25% cylindrical membrane was evaluated in rodents in parallel with a PEG-diacrylate (PEG-DA) hydrogel as an established benchmark biocompatible control. Notably, the DN-25% implants were more than 25× stronger and tougher than the PEG-DA implants while maintaining a modulus near that of subcutaneous tissue. From examining the FBR at 7, 30 and 90 days after implantation, the thermoresponsive DN-25% implants demonstrated a rapid healing response and a minimal fibrous capsule (~20-25 µm), similar to the PEG-DA implants. Thus, the dynamic self-cleaning mechanism of the DN-25% membranes represents a new approach to limit the FBR while achieving the durability necessary for long-term implantable glucose biosensors.
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Affiliation(s)
- A Kristen Means
- Department of Materials Science & Engineering, Texas A&M University, College Station, TX, 77843-3003, USA
| | - Ping Dong
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA
| | - Fred J Clubb
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA
- Department of Veterinary Pathobiology, Texas A&M University, College Station, TX, 77843-4467, USA
| | - Molly C Friedemann
- Department of Veterinary Pathobiology, Texas A&M University, College Station, TX, 77843-4467, USA
| | - Lydia E Colvin
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA
| | - Courtney A Shrode
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA
| | - Gerard L Coté
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA
- Center for Remote Health Technologies Systems, Texas A&M University, College Station, TX, 77843-3120, USA
| | - Melissa A Grunlan
- Department of Materials Science & Engineering, Texas A&M University, College Station, TX, 77843-3003, USA.
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843-3120, USA.
- Center for Remote Health Technologies Systems, Texas A&M University, College Station, TX, 77843-3120, USA.
- Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA.
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27
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Zha RH, Delparastan P, Fink TD, Bauer J, Scheibel T, Messersmith PB. Universal nanothin silk coatings via controlled spidroin self-assembly. Biomater Sci 2019; 7:683-695. [PMID: 30628598 PMCID: PMC6459601 DOI: 10.1039/c8bm01186a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Robust, biocompatible, and facile coatings are promising for improving the in vivo performance of medical implants and devices. Here, we demonstrate the formation of nanothin silk coatings by leveraging the biomimetic self-assembly of eADF4(C16), an amphiphilic recombinant protein based on the Araneus diadematus dragline spidroin ADF4. These coatings result from concurrent adsorption and supramolecular assembly of eADF4(C16) induced by KH2PO4, thereby providing a mild one-pot coating strategy in which the coating rate can be controlled by protein and KH2PO4 concentration. The thickness of the coatings ranges from 2-30 nm depending on the time immersed in the aqueous coating solution. Coatings can be formed on hydrophobic and hydrophilic substrates regardless of surface chemistry and without requiring specialized surface activation. Moreover, coatings appear to be stable through vigorous rinsing and prolonged agitation in water. Grazing incidence wide angle X-ray scattering, single-molecule force spectroscopy, and Congo red staining techniques confirm the formation of β-sheet nanocrystals within the eADF4(C16) coating, which contributes to the cohesive and adhesive stability of the material. Coatings are exceptionally smooth in the dry state and are hydrophilic regardless of substrate hydrophobicity. Under aqueous conditions, nanothin silk coatings exhibit the properties of a hydrogel material.
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Affiliation(s)
- R Helen Zha
- Department of Chemical & Biological Engineering, Rensselaer Polytechnic Institute, 110 8th St., Troy, NY 12180, USA.
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A novel semiconductor based wireless electrochemical sensing platform for chronic disease management. Biosens Bioelectron 2018; 124-125:66-74. [PMID: 30343158 DOI: 10.1016/j.bios.2018.09.077] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 08/22/2018] [Accepted: 09/19/2018] [Indexed: 11/21/2022]
Abstract
Electrochemical sensors are very versatile and can be used for a diverse range of biomedical applications. In this paper, a novel fully-integrated wireless electrochemical sensing platform is presented. The platform uses standard semiconductor technology to create a miniaturized integrated bioelectronics system that consists of an electrochemical sensor, potentiostat, signal processing circuitry, wireless power harvesting circuitry, and wireless telemetry unit, all on a single microchip. The platform is orders of magnitude smaller than the state-of-the-art sensing systems and costs a fraction. At 1.4 mm × 1.4 mm size, the sensor costs less than $1 to manufacture. The presented design provides fundamental advantages in decreasing sensor noise and settling time, thus providing superior response compared to existing solutions. System design and implementation details are presented as well as examples for metabolic sensing (glucose, lactate, O2) applications. The system can have widespread applications in biosensing applications.
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Zhou G, Groth T. Host Responses to Biomaterials and Anti-Inflammatory Design-a Brief Review. Macromol Biosci 2018; 18:e1800112. [DOI: 10.1002/mabi.201800112] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/08/2018] [Indexed: 12/13/2022]
Affiliation(s)
- Guoying Zhou
- Biomedical Materials Group; Institute of Pharmacy; Martin Luther University Halle-Wittenberg; 06099 Halle (Saale) Germany
| | - Thomas Groth
- Biomedical Materials Group; Institute of Pharmacy and, Interdisciplinary Center of Material Science and Interdisciplinary Center for Transfer-Oriented Research in Natural Sciences; Martin Luther University Halle-Wittenberg; 06099 Halle (Saale) Germany
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Scholten K, Meng E. A review of implantable biosensors for closed-loop glucose control and other drug delivery applications. Int J Pharm 2018; 544:319-334. [DOI: 10.1016/j.ijpharm.2018.02.022] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 01/30/2018] [Accepted: 02/15/2018] [Indexed: 12/19/2022]
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Xu T, Yang J, Zhang J, Zhu Y, Li Q, Pan C, Zhang L. Facile modification of electrospun fibrous structures with antifouling zwitterionic hydrogels. ACTA ACUST UNITED AC 2017; 13:015021. [PMID: 28862158 DOI: 10.1088/1748-605x/aa89b2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Electrospinning technology can easily produce different shaped fibrous structures, making them highly valuable to various biomedical applications. However, surface contamination of biomolecules, cells, or blood has emerged as a significant challenge to the success of electrospun devices, especially artificial blood vessels, catheters and wound dressings etc. Many efforts have been made to resist the surface non-specific biomolecules or cells adsorption, but most of them require complex pre-treatment processes, hard-to-remove metal catalysts or rigorous reaction conditions. In addition, the stability of antifouling coatings, especially in complex conditions, is still a major concern. In this work, inspired by the interpenetrating polymer network and reinforced concrete structure, an efficient and facile strategy for modifying hydrophobic electrospun meshes and tubes with antifouling zwitterionic hydrogels has been introduced. The resulting products could efficiently resist the adhesion of proteins, cells, or even fresh whole blood. Meanwhile, they could maintain the shapes and mechanical strength of the original electrospun structures. Furthermore, the hydrogel structures could retain stable in a physiological condition for at least 3 months. This paper provided a general antifouling and hydrophilicity surface modification strategy for various fibrous structures, and could be of great value for many biomedical applications where antifouling properties are critical.
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Affiliation(s)
- Tong Xu
- Department of Biochemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, People's Republic of China. Key Laboratory of Systems Bioengineering of the Ministry of Education, Tianjin University, Tianjin, 300072, People's Republic of China. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin, 300072, People's Republic of China
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Photochemically Controlled Drug Dosing from a Polymeric Scaffold. Pharm Res 2017; 34:1469-1476. [PMID: 28508123 PMCID: PMC5445155 DOI: 10.1007/s11095-017-2164-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Accepted: 04/25/2017] [Indexed: 11/15/2022]
Abstract
Purpose To develop the first photoactive biomaterial coating capable of controlled drug dosing via inclusion of synthesised drug-3,5-dimethoxybenzoin (DMB) conjugates in a poly(2-methyoxyethyl acrylate) (pMEA) scaffold. Methods Flurbiprofen- and naproxen-DMB conjugates were prepared via esterification and characterised via NMR spectroscopy and mass spectrometry following chromatographic purification. Conjugate photolysis was investigated in acetonitrile solution and within the pMEA matrix following exposure to low-power 365 nm irradiation. Photo-liberation of drug from pMEA into phosphate buffered saline was monitored using UV-vis spectroscopy. Results The synthetic procedures yielded the desired drug conjugates with full supporting characterisation. Drug regeneration through photolysis of the synthesised conjugates was successful in both acetonitrile solution and within the pMEA scaffold upon UV irradiation. Conjugates were retained within the pMEA scaffold with exclusive drug liberation following irradiation and increased drug dose with increasing exposure. Multi-dosing capacity was demonstrated though the ability of successive irradiation periods to generate further bursts of drug. Conclusion This study demonstrates the first application of photochemically controlled drug release from a biomaterial coating and the feasibility of using pMEA as a scaffold for housing the photoactive drug-DMB conjugates.
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Lee YJ, Kim HJ, Kang JY, Do SH, Lee SH. Biofunctionalization of Nerve Interface via Biocompatible Polymer-Roughened Pt Black on Cuff Electrode for Chronic Recording. Adv Healthc Mater 2017; 6. [PMID: 28092438 DOI: 10.1002/adhm.201601022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 11/11/2016] [Indexed: 12/21/2022]
Abstract
Peripheral nerve cuff electrodes with roughened Pt black (BPt) are coated with polyethylene glycol (PEG) and Nafion (NF). Although the influence of coated PEG and Nafion on roughened BPt on the electrical properties is weak, the cuff electrode with BPt/PEG and BPt/Nafion exhibits some very important properties. For example, it markedly decreases interfacial impedance, increases charge storage capacity (CSC) due to retaining the BPt surface structure, good stability without exfoliation in repetitive cyclic voltammetry scanning because it is protected by PEG or Nafion coating. In cell viability test, Nafion-coated BPt does not show cytotoxicity to rat Schwann cell line (S16) at 24 and 72 h with the Nafion coating ranging from 0.1 to 10 mg cm-2 . In addition, real-time polymerase chain reaction (PCR) analysis indicates that Schwann cell differentiation (S100 calcium-binding protein B, myelin basic protein, peripheral myelin protein 22), proliferation (proliferating cell nuclear antigen, cyclin-dependent kinase 1 (CDK1)), and adhesion molecules (neural cell adhesion molecule, laminin, fibronectin) are upregulated up to 5 mg cm-2 of Nafion. In animal study, the BPt/Nafion reduces infiltration of fibrotic tissue with high axonal maintenance with upregulation of proliferation (CDK1), adhesion (laminin, neuronal cell adhesion molecule), and neurotrophic factor receptor-related (gdnf family receptor alpha 1) mRNA expressions.
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Affiliation(s)
- Yi Jae Lee
- Center for BioMicrosystems; Korea Institute of Science and Technology; Seoul 02792 Republic of Korea
| | - Han-Jun Kim
- Department of Clinical Pathology; College of Veterinary Medicine; Konkuk University; Seoul 05029 Republic of Korea
| | - Ji Yoon Kang
- Center for BioMicrosystems; Korea Institute of Science and Technology; Seoul 02792 Republic of Korea
| | - Sun Hee Do
- Department of Clinical Pathology; College of Veterinary Medicine; Konkuk University; Seoul 05029 Republic of Korea
| | - Soo Hyun Lee
- Center for BioMicrosystems; Korea Institute of Science and Technology; Seoul 02792 Republic of Korea
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Kumar M, Coburn J, Kaplan DL, Mandal BB. Immuno-Informed 3D Silk Biomaterials for Tailoring Biological Responses. ACS APPLIED MATERIALS & INTERFACES 2016; 8:29310-29322. [PMID: 27726371 DOI: 10.1021/acsami.6b09937] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Macrophages, the key players in immunoregulation, are actively involved in tissue remodelling and vascularization. Recent advances in tissue engineering and regenerative medicine illustrate the importance of "immuno-informed" biomaterials to regulate the microenvironment of biomedical implants. In the current study, silk-based 3D hydrogels were utilized to regulate cytokine delivery for macrophage, a type of immune cell, differentiation and polarization. Three different hydrogel variants, silk-poly(ethylene glycol) (PEG) (SP), silk-horseradish peroxidase (HRP) (SH) and silk-sonicated (SS) hydrogels were studied. Hydrogels were loaded with the M1 and M2 polarizing cytokines interferon-γ (IFN-γ) and interleukin-4 (IL-4), respectively. Functional cytokine release and macrophage polarization studies were conducted using three cytokine exposure approaches: only cytokine encapsulation (macrophage in culture well), only macrophage encapsulation (cytokine in culture media) and cytokine with macrophage encapsulation. The extent of macrophage polarization by cytokine-eluting and macrophage-encapsulating hydrogels was investigated using gene expression analysis for C-C chemokine receptor 7 (CCR7), Interleukin-1 beta (IL-1β), cluster of differentiation 206 (CD206) and cluster of differentiation 209 (CD209). The released cytokines polarized macrophages from an M0 phenotype to an M1/M2 phenotype. Also, lineage committed M1/M2 macrophages could be "switched" to their M2/M1 counterparts (M1-to-M2 or M2-to-M1 transition) exhibiting their well-established plasticity. When macrophages were encapsulated in hydrogels, polarization could be induced to the lineage committed M1 or M2 phenotypes either in polarizing media or when coencapsulated with cytokines. Through this study, silk hydrogels demonstrated utility as a novel system for focal delivery of cytokines and macrophages as "immuno-informed" 3D silk-biomaterials.
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Affiliation(s)
- Manishekhar Kumar
- Biomaterial and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG) , Guwahati, 781039, India
| | - Jeannine Coburn
- Department of Biomedical Engineering, Tufts University , Medford, Massachusetts United States
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University , Medford, Massachusetts United States
| | - Biman B Mandal
- Biomaterial and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati (IITG) , Guwahati, 781039, India
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Strandman S, Zhu XX. Self-Healing Supramolecular Hydrogels Based on Reversible Physical Interactions. Gels 2016; 2:E16. [PMID: 30674148 PMCID: PMC6318650 DOI: 10.3390/gels2020016] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 03/23/2016] [Accepted: 03/28/2016] [Indexed: 12/26/2022] Open
Abstract
Dynamic and reversible polymer networks capable of self-healing, i.e., restoring their mechanical properties after deformation and failure, are gaining increasing research interest, as there is a continuous need towards extending the lifetime and improving the safety and performance of materials particularly in biomedical applications. Hydrogels are versatile materials that may allow self-healing through a variety of covalent and non-covalent bonding strategies. The structural recovery of physical gels has long been a topic of interest in soft materials physics and various supramolecular interactions can induce this kind of recovery. This review highlights the non-covalent strategies of building self-repairing hydrogels and the characterization of their mechanical properties. Potential applications and future prospects of these materials are also discussed.
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Affiliation(s)
- Satu Strandman
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montreal, QC H3C 3J7, Canada.
| | - X X Zhu
- Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montreal, QC H3C 3J7, Canada.
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Kasák P, Mosnáček J, Danko M, Krupa I, Hloušková G, Chorvát D, Koukaki M, Karamanou S, Economou A, Lacík I. A polysulfobetaine hydrogel for immobilization of a glucose-binding protein. RSC Adv 2016. [DOI: 10.1039/c6ra14423c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A hydrogel based on sulfobetaine methacrylate monomer and crosslinker was investigated as a potential material for fluorescent glucose biosensor applications.
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Affiliation(s)
- Peter Kasák
- Center for Advanced Materials
- Qatar University
- 2713 Doha
- Qatar
| | - Jaroslav Mosnáček
- Polymer Institute of the Slovak Academy of Sciences
- 845 41 Bratislava
- Slovakia
| | - Martin Danko
- Polymer Institute of the Slovak Academy of Sciences
- 845 41 Bratislava
- Slovakia
| | - Igor Krupa
- Center for Advanced Materials
- Qatar University
- 2713 Doha
- Qatar
| | - Gabriela Hloušková
- Polymer Institute of the Slovak Academy of Sciences
- 845 41 Bratislava
- Slovakia
| | | | | | - Spyridoula Karamanou
- KU Leuven
- Department of Microbiology and Immunology
- Rega Institute for Medical Research
- Laboratory of Molecular Bacteriology
- B-3000 Leuven
| | | | - Igor Lacík
- Polymer Institute of the Slovak Academy of Sciences
- 845 41 Bratislava
- Slovakia
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Zhang Z, Tang Z, Su T, Li W, Wang Q. Hydrogel-coated enzyme electrodes formed by GOx-mediated polymerization for glucose detecting. RSC Adv 2015. [DOI: 10.1039/c5ra05495h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
This communication reports the mild fabrication of a hydrogel-coated enzyme electrode for glucose detecting with high sensitivity (35.19 μA mM−1 cm−2) and robust stability.
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Affiliation(s)
- Ziyang Zhang
- Department of Chemistry
- Advanced Research Institute
- Tongji University
- Shanghai
- China
| | - Zhou Tang
- Department of Chemistry
- Advanced Research Institute
- Tongji University
- Shanghai
- China
| | - Teng Su
- Department of Chemistry
- Advanced Research Institute
- Tongji University
- Shanghai
- China
| | - Wenjun Li
- Department of Chemistry
- Advanced Research Institute
- Tongji University
- Shanghai
- China
| | - Qigang Wang
- Department of Chemistry
- Advanced Research Institute
- Tongji University
- Shanghai
- China
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Felice AKG, Sygmund C, Harreither W, Kittl R, Gorton L, Ludwig R. Substrate specificity and interferences of a direct-electron-transfer-based glucose biosensor. J Diabetes Sci Technol 2013; 7:669-77. [PMID: 23759400 PMCID: PMC3869135 DOI: 10.1177/193229681300700312] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Electrochemical sensors for glucose monitoring employ different signal transduction strategies for electron transfer from the biorecognition element to the electrode surface. We present a biosensor that employs direct electron transfer and evaluate its response to various interfering substances known to affect glucose biosensors. METHODS The enzyme cellobiose dehydrogenase (CDH) was adsorbed on the surface of a carbon working electrode and covalently bound by cross linking. The response of CDH-modified electrodes to glucose and possible interfering compounds was measured by flow-injection analysis, linear sweep, and chronoamperometry. RESULTS Chronoamperometry showed initial swelling/wetting of the electrode. After stabilization, the signal was stable and a sensitivity of 0.21 µA mM-1 cm-2 was obtained. To investigate the influence of the interfering substances on the biorecognition element, the simplest possible sensor architecture was used. The biosensor showed little (<5% signal deviation) or no response to various reported electroactive or otherwise interfering substances. CONCLUSIONS Direct electron transfer from the biorecognition element to the electrode is a new principle applied to glucose biosensors, which can be operated at a low polarization potential of -100 mV versus silver/silver chloride. The reduction of interferences by electrochemically active substances is an attractive feature of this promising technology for the development of continuous glucose biosensors.
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Affiliation(s)
- Alfons K. G. Felice
- Department of Food Science and Technology, Vienna Institute of Biotechnology, BOKU—University of Natural Resources and Life Sciences, Vienna, Austria
| | | | | | - Roman Kittl
- Department of Food Science and Technology, Vienna Institute of Biotechnology, BOKU—University of Natural Resources and Life Sciences, Vienna, Austria
- DirectSens GmbH, Klosterneuburg, Austria
| | - Lo Gorton
- Department of Analytical Chemistry, Biochemistry and Structural Biology, Lund University Lund, Sweden
| | - Roland Ludwig
- Department of Food Science and Technology, Vienna Institute of Biotechnology, BOKU—University of Natural Resources and Life Sciences, Vienna, Austria
- DirectSens GmbH, Klosterneuburg, Austria
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Nichols SP, Koh A, Storm WL, Shin JH, Schoenfisch MH. Biocompatible materials for continuous glucose monitoring devices. Chem Rev 2013; 113:2528-49. [PMID: 23387395 PMCID: PMC3624030 DOI: 10.1021/cr300387j] [Citation(s) in RCA: 188] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Scott P. Nichols
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Ahyeon Koh
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Wesley L. Storm
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
| | - Jae Ho Shin
- Department of Chemistry, Kwangwoon University, Seoul, Korea
| | - Mark H. Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA
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Vaddiraju S, Legassey A, Qiang L, Wang Y, Burgess DJ, Papadimitrakopoulos F. Enhancing the sensitivity of needle-implantable electrochemical glucose sensors via surface rebuilding. J Diabetes Sci Technol 2013; 7:441-51. [PMID: 23567003 PMCID: PMC3737646 DOI: 10.1177/193229681300700221] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Needle-implantable sensors have shown to provide reliable continuous glucose monitoring for diabetes management. In order to reduce tissue injury during sensor implantation, there is a constant need for device size reduction, which imposes challenges in terms of sensitivity and reliability, as part of decreasing signal-to-noise and increasing layer complexity. Herein, we report sensitivity enhancement via electrochemical surface rebuilding of the working electrode (WE), which creates a three-dimensional nanoporous configuration with increased surface area. METHODS The gold WE was electrochemically rebuilt to render its surface nanoporous followed by decoration with platinum nanoparticles. The efficacy of such process was studied using sensor sensitivity against hydrogen peroxide (H2O2). For glucose detection, the WE was further coated with five layers, namely, (1) polyphenol, (2) glucose oxidase, (3) polyurethane, (4) catalase, and (5) dexamethasone-releasing poly(vinyl alcohol)/poly(lactic-co-glycolic acid) composite. The amperometric response of the glucose sensor was noted in vitro and in vivo. RESULTS Scanning electron microscopy revealed that electrochemical rebuilding of the WE produced a nanoporous morphology that resulted in a 20-fold enhancement in H2O2 sensitivity, while retaining >98% selectivity. This afforded a 4-5-fold increase in overall glucose response of the glucose sensor when compared with a control sensor with no surface rebuilding and fittable only within an 18 G needle. The sensor was able to reproducibly track in vivo glycemic events, despite the large background currents typically encountered during animal testing. CONCLUSION Enhanced sensor performance in terms of sensitivity and large signal-to-noise ratio has been attained via electrochemical rebuilding of the WE. This approach also bypasses the need for conventional and nanostructured mediators currently employed to enhance sensor performance.
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Affiliation(s)
- Santhisagar Vaddiraju
- Biorasis Inc. Technology Incubation Program, University of Connecticut, Storrs, Connecticut
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut
| | - Allen Legassey
- Biorasis Inc. Technology Incubation Program, University of Connecticut, Storrs, Connecticut
| | - Liangliang Qiang
- Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut
| | - Yan Wang
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, Connecticut
| | - Diane J. Burgess
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, Connecticut
| | - Fotios Papadimitrakopoulos
- Biorasis Inc. Technology Incubation Program, University of Connecticut, Storrs, Connecticut
- Department of Chemistry, University of Connecticut, Storrs, Connecticut
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Lin X, Tang D, Du H. Self-assembly and controlled release behaviour of the water-insoluble drug nifedipine from electrospun PCL-based polyurethane nanofibres. J Pharm Pharmacol 2013; 65:673-81. [PMID: 23600384 DOI: 10.1111/jphp.12036] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 01/15/2013] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Electrospun micro- and nanofibres are increasingly being investigated for drug delivery. The components of nanofibres are important influences on the drug release behaviour. The aim of this study was to investigate the self-assembly and release behaviour of drug from nanofibres. METHODS Water-insoluble drug nifedipine (NIF)-loaded nanofibres with polymeric carrier of polycaprolactone (PCL)-based polyurethane (PU) were fabricated by electrospinning. The morphology of the nanofibres and the composite nanofibres with NIF were examined by scanning electron microscopy (SEM). The interactions between NIF and PU were followed by Fourier-transform infrared spectroscopy, and the elemental composition on the surface of the nanofibres was characterized by X-ray photoelectron spectroscopy. The release behaviour of NIF from nanofibres was observed by SEM (contacted with or without a drop of ethanol), and demonstrated by UV-Vis spectroscopy. KEY FINDINGS In-vitro drug release studies revealed that a self-assembly process of NIF particles might be achieved within the body of the nanofibres. The electrospun nanofibre was an ideal drug carrier compared with a spin-coated film and could achieve controlled release of drug. CONCLUSIONS The electrospinning technique could be used to fabricate a polymeric carrier that might have potential applications in the biomedical field.
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Affiliation(s)
- Xiuling Lin
- Department of Chemistry, Harbin Institute of Technology, Harbin, China
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Wang N, Burugapalli K, Song W, Halls J, Moussy F, Ray A, Zheng Y. Electrospun fibro-porous polyurethane coatings for implantable glucose biosensors. Biomaterials 2013; 34:888-901. [PMID: 23146433 PMCID: PMC3511670 DOI: 10.1016/j.biomaterials.2012.10.049] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Accepted: 10/20/2012] [Indexed: 11/15/2022]
Abstract
This study reports methods for coating miniature implantable glucose biosensors with electrospun polyurethane (PU) membranes, their effects on sensor function and efficacy as mass-transport limiting membranes. For electrospinning fibres directly on sensor surface, both static and dynamic collector systems, were designed and tested. Optimum collector configurations were first ascertained by FEA modelling. Both static and dynamic collectors allowed complete covering of sensors, but it was the dynamic collector that produced uniform fibro-porous PU coatings around miniature ellipsoid biosensors. The coatings had random fibre orientation and their uniform thickness increased linearly with increasing electrospinning time. The effects of coatings having an even spread of submicron fibre diameters and sub-100 μm thicknesses on glucose biosensor function were investigated. Increasing thickness and fibre diameters caused a statistically insignificant decrease in sensor sensitivity for the tested electrospun coatings. The sensors' linearity for the glucose detection range of 2-30 mM remained unaffected. The electrospun coatings also functioned as mass-transport limiting membranes by significantly increasing the linearity, replacing traditional epoxy-PU outer coating. To conclude, electrospun coatings, having controllable fibro-porous structure and thicknesses, on miniature ellipsoid glucose biosensors were demonstrated to have minimal effect on pre-implantation sensitivity and also to have mass-transport limiting ability.
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Affiliation(s)
- Ning Wang
- Brunel Institute for Bioengineering, Brunel University, Uxbridge, London, UK
| | - Krishna Burugapalli
- Brunel Institute for Bioengineering, Brunel University, Uxbridge, London, UK
| | - Wenhui Song
- Wolfson Centre for Materials Processing, Brunel University, Uxbridge, London, UK
| | - Justin Halls
- Brunel Institute for Bioengineering, Brunel University, Uxbridge, London, UK
| | - Francis Moussy
- Brunel Institute for Bioengineering, Brunel University, Uxbridge, London, UK
| | - Asim Ray
- Wolfson Centre for Materials Processing, Brunel University, Uxbridge, London, UK
| | - Yudong Zheng
- School of Materials Science & Engineering, University of Science and Technology Beijing, China
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Wang Y, Vaddiraju S, Qiang L, Xu X, Papadimitrakopoulos F, Burgess DJ. Effect of dexamethasone-loaded poly(lactic-co-glycolic acid) microsphere/poly(vinyl alcohol) hydrogel composite coatings on the basic characteristics of implantable glucose sensors. J Diabetes Sci Technol 2012; 6:1445-53. [PMID: 23294792 PMCID: PMC3570887 DOI: 10.1177/193229681200600626] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND Hydrogels alone and in combination with microsphere drug delivery systems are being considered as biocompatible coatings for implantable glucose biosensors to prevent/minimize the foreign body response. Previously, our group has demonstrated that continuous release of dexamethasone from poly(lactic-co-glycolic acid) (PLGA) microsphere/poly(vinyl alcohol) (PVA) hydrogel composites can successfully prevent foreign body response at the implantation site. The objective of this study was to investigate the effect of this composite coating on sensor functionality. METHODS The PLGA microsphere/PVA hydrogel coatings were prepared and applied to glucose biosensors. The swelling properties of the composite coatings and their diffusivity to glucose were evaluated as a function of microsphere loading. Sensor linearity, response time, and sensitivity were also evaluated as a function of coating composition. RESULTS The PLGA microsphere/PVA hydrogel composite coating did not compromise sensor linearity (sensors were linear up to 30 mM), which is well beyond the physiological glucose range (2 to 22 mM). The sensor response time did increase in the presence of the coating (from 10 to 19 s); however, this response time was still less than the average reported values. Although the sensitivity of the sensors decreased from 73 to 62 nA/mM glucose when the PLGA microsphere loading in the PVA hydrogel changed from 0 to 100 mg/ml, this reduced sensitivity is acceptable for sensor functionality. The changes in sensor response time and sensitivity were due to changes in glucose permeability as a result of the coatings. The embedded PLGA microspheres reduced the fraction of bulk water present in the hydrogel matrix and consequently reduced glucose diffusion. CONCLUSIONS This study demonstrates that the PLGA microsphere/PVA hydrogel composite coatings allow sufficient glucose diffusion and sensor functionality and therefore may be utilized as a smart coating for implantable glucose biosensors to enhance their in vivo functionality.
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Affiliation(s)
- Yan Wang
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, Connecticut
| | - Santhisagar Vaddiraju
- Nanomaterials Optoelectronics Laboratory, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut
- Biorasis Inc., Storrs, Connecticut
| | - Liangliang Qiang
- Nanomaterials Optoelectronics Laboratory, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut
| | - Xiaoming Xu
- U.S. Food and Drug Administration, Silver Spring, Maryland
| | - Fotios Papadimitrakopoulos
- Nanomaterials Optoelectronics Laboratory, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, Connecticut
- Department of Chemistry, University of Connecticut, Storrs, Connecticut
| | - Diane J. Burgess
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, Connecticut
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Nichols SP, Koh A, Brown NL, Rose MB, Sun B, Slomberg DL, Riccio DA, Klitzman B, Schoenfisch MH. The effect of nitric oxide surface flux on the foreign body response to subcutaneous implants. Biomaterials 2012; 33:6305-12. [PMID: 22748919 PMCID: PMC3667553 DOI: 10.1016/j.biomaterials.2012.05.053] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Accepted: 05/20/2012] [Indexed: 01/09/2023]
Abstract
Although the release of nitric oxide (NO) from biomaterials has been shown to reduce the foreign body response (FBR), the optimal NO release kinetics and doses remain unknown. Herein, polyurethane-coated wire substrates with varying NO release properties were implanted into porcine subcutaneous tissue for 3, 7, 21 and 42 d. Histological analysis revealed that materials with short NO release durations (i.e., 24 h) were insufficient to reduce the collagen capsule thickness at 3 and 6 weeks, whereas implants with longer release durations (i.e., 3 and 14 d) and greater NO payloads significantly reduced the collagen encapsulation at both 3 and 6 weeks. The acute inflammatory response was mitigated most notably by systems with the longest duration and greatest dose of NO release, supporting the notion that these properties are most critical in circumventing the FBR for subcutaneous biomedical applications (e.g., glucose sensors).
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Affiliation(s)
- Scott P. Nichols
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Ahyeon Koh
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Nga L. Brown
- Kenan Plastic Surgery Research Laboratories, Department of Biomedical Engineering, Duke University Medical Center, Durham, NC 27710, USA
| | - Michael B. Rose
- Kenan Plastic Surgery Research Laboratories, Department of Biomedical Engineering, Duke University Medical Center, Durham, NC 27710, USA
| | - Bin Sun
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Danielle L. Slomberg
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Daniel A. Riccio
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Bruce Klitzman
- Kenan Plastic Surgery Research Laboratories, Department of Biomedical Engineering, Duke University Medical Center, Durham, NC 27710, USA
| | - Mark H. Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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Carrara S, Ghoreishizadeh S, Olivo J, Taurino I, Baj-Rossi C, Cavallini A, de Beeck MO, Dehollain C, Burleson W, Moussy FG, Guiseppi-Elie A, De Micheli G. Fully integrated biochip platforms for advanced healthcare. SENSORS (BASEL, SWITZERLAND) 2012; 12:11013-60. [PMID: 23112644 PMCID: PMC3472872 DOI: 10.3390/s120811013] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 07/10/2012] [Accepted: 07/17/2012] [Indexed: 01/07/2023]
Abstract
Recent advances in microelectronics and biosensors are enabling developments of innovative biochips for advanced healthcare by providing fully integrated platforms for continuous monitoring of a large set of human disease biomarkers. Continuous monitoring of several human metabolites can be addressed by using fully integrated and minimally invasive devices located in the sub-cutis, typically in the peritoneal region. This extends the techniques of continuous monitoring of glucose currently being pursued with diabetic patients. However, several issues have to be considered in order to succeed in developing fully integrated and minimally invasive implantable devices. These innovative devices require a high-degree of integration, minimal invasive surgery, long-term biocompatibility, security and privacy in data transmission, high reliability, high reproducibility, high specificity, low detection limit and high sensitivity. Recent advances in the field have already proposed possible solutions for several of these issues. The aim of the present paper is to present a broad spectrum of recent results and to propose future directions of development in order to obtain fully implantable systems for the continuous monitoring of the human metabolism in advanced healthcare applications.
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Affiliation(s)
- Sandro Carrara
- École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; E-Mails: (S.S.G.); (J.O.); (I.T.); (C.B.-R.); (A.C.); (C.D.); (G.D.M.)
| | - Sara Ghoreishizadeh
- École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; E-Mails: (S.S.G.); (J.O.); (I.T.); (C.B.-R.); (A.C.); (C.D.); (G.D.M.)
| | - Jacopo Olivo
- École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; E-Mails: (S.S.G.); (J.O.); (I.T.); (C.B.-R.); (A.C.); (C.D.); (G.D.M.)
| | - Irene Taurino
- École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; E-Mails: (S.S.G.); (J.O.); (I.T.); (C.B.-R.); (A.C.); (C.D.); (G.D.M.)
| | - Camilla Baj-Rossi
- École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; E-Mails: (S.S.G.); (J.O.); (I.T.); (C.B.-R.); (A.C.); (C.D.); (G.D.M.)
| | - Andrea Cavallini
- École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; E-Mails: (S.S.G.); (J.O.); (I.T.); (C.B.-R.); (A.C.); (C.D.); (G.D.M.)
| | - Maaike Op de Beeck
- Interuniversity Microelectronics Centre (IMEC), B-3001 Leuven, Belgium; E-Mail:
| | - Catherine Dehollain
- École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; E-Mails: (S.S.G.); (J.O.); (I.T.); (C.B.-R.); (A.C.); (C.D.); (G.D.M.)
| | - Wayne Burleson
- Department of Electrical and Computer Engineering, University of Massachusetts, Amherst, MA 01003, USA; E-Mail:
| | - Francis Gabriel Moussy
- Brunel Institute for Bioengineering, University of Brunel, West London, UB8 3PH, UK; E-Mail:
| | - Anthony Guiseppi-Elie
- Department of Electrical and Computer Engineering, Center for Bioelectronics, Biosensors and Biochips, Clemson University, Anderson, SC 29625, USA; E-Mail:
- ABTECH Scientific, Inc., Richmond, VA 23219, USA
| | - Giovanni De Micheli
- École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; E-Mails: (S.S.G.); (J.O.); (I.T.); (C.B.-R.); (A.C.); (C.D.); (G.D.M.)
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Jin J, Zhang C, Jiang W, Luan S, Yang H, Yin J, Stagnaro P. Melting grafting polypropylene with hydrophilic monomers for improving hemocompatibility. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.05.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Merkel TJ, Chen K, Jones SW, Pandya AA, Tian S, Napier ME, Zamboni WE, DeSimone JM. The effect of particle size on the biodistribution of low-modulus hydrogel PRINT particles. J Control Release 2012; 162:37-44. [PMID: 22705460 DOI: 10.1016/j.jconrel.2012.06.009] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 05/21/2012] [Accepted: 06/05/2012] [Indexed: 10/28/2022]
Abstract
There is a growing recognition that the deformability of particles used for drug delivery plays a significant role on their biodistribution and circulation profile. Understanding these effects would provide a crucial tool for the rational design of drug delivery systems. While particles resembling red blood cells (RBCs) in size, shape and deformability have extended circulation times and altered biodistribution profiles compared to rigid, but otherwise similar particles, the in vivo behavior of such highly deformable particles of varied size has not been explored. We report the fabrication of a series of discoid, monodisperse, low-modulus hydrogel particles with diameters ranging from 0.8 to 8.9 μm, spanning sizes smaller than and larger than RBCs. We injected these particles into healthy mice, and tracked their concentration in the blood and their distribution into major organs. These deformable particles all demonstrated some hold up in filtration tissues like the lungs and spleen, followed by release back into the circulation, characterized by decreases in particles in these tissues with concomitant increases in particle concentration in blood. Particles similar to red blood cells in size demonstrated longer circulation times, suggesting that this size and shape of deformable particle is uniquely suited to avoid clearance.
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Affiliation(s)
- Timothy J Merkel
- Department of Chemistry, University of North Carolina, United States
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Kotanen CN, Wilson AN, Wilson AM, Ishihara K, Guiseppi-Elie A. Biomimetic hydrogels gate transport of calcium ions across cell culture inserts. Biomed Microdevices 2012; 14:549-58. [DOI: 10.1007/s10544-012-9632-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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