1
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Javanbakht S, Darvishi S, Dorchei F, Hosseini-Ghalehno M, Dehghani M, Pooresmaeil M, Suzuki Y, Ul Ain Q, Ruiz Rubio L, Shaabani A, Hayashita T, Namazi H, Heydari A. Cyclodextrin Host-Guest Recognition in Glucose-Monitoring Sensors. ACS OMEGA 2023; 8:33202-33228. [PMID: 37744789 PMCID: PMC10515351 DOI: 10.1021/acsomega.3c03746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 08/23/2023] [Indexed: 09/26/2023]
Abstract
Diabetes mellitus is a prevalent chronic health condition that has caused millions of deaths worldwide. Monitoring blood glucose levels is crucial in diabetes management, aiding in clinical decision making and reducing the incidence of hypoglycemic episodes, thereby decreasing morbidity and mortality rates. Despite advancements in glucose monitoring (GM), the development of noninvasive, rapid, accurate, sensitive, selective, and stable systems for continuous monitoring remains a challenge. Addressing these challenges is critical to improving the clinical utility of GM technologies in diabetes management. In this concept, cyclodextrins (CDs) can be instrumental in the development of GM systems due to their high supramolecular recognition capabilities based on the host-guest interaction. The introduction of CDs into GM systems not only impacts the sensitivity, selectivity, and detection limit of the monitoring process but also improves biocompatibility and stability. These findings motivated the current review to provide a comprehensive summary of CD-based blood glucose sensors and their chemistry of glucose detection, efficiency, and accuracy. We categorize CD-based sensors into four groups based on their modification strategies, including CD-modified boronic acid, CD-modified mediators, CD-modified nanoparticles, and CD-modified functionalized polymers. These findings shed light on the potential of CD-based sensors as a promising tool for continuous GM in diabetes mellitus management.
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Affiliation(s)
- Siamak Javanbakht
- Research
Laboratory of Dendrimers and Natural Polymers, Faculty of Chemistry, University of Tabriz, P.O. Box 51666, Tabriz, Iran
| | - Sima Darvishi
- Faculty
of Chemistry, Khajeh Nasir Toosi University, Tehran, Iran
| | - Faeze Dorchei
- Polymer
Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
| | | | - Marjan Dehghani
- Department
of Chemistry, Shahid Bahonar University
of Kerman, Kerman 76169, Iran
| | - Malihe Pooresmaeil
- Research
Laboratory of Dendrimers and Natural Polymers, Faculty of Chemistry, University of Tabriz, P.O. Box 51666, Tabriz, Iran
| | - Yota Suzuki
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1, Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
- Graduate
School of Science and Engineering, Saitama
University, Saitama 338-8570, Japan
| | - Qurat Ul Ain
- Department
of Materials Engineering, School of Chemical and Materials Engineering, National University of Sciences and Technology, Islamabad H-12, Pakistan
| | - Leire Ruiz Rubio
- Macromolecular
Chemistry Group (LQM), Department of Physical Chemistry, Faculty of
Science and Technology, University of Basque
Country (UPV/EHU), Leioa 48940, Spain
- Basque
Centre for Materials, Applications and Nanostructures
(BCMaterials), UPV/EHU
Science Park, Leioa 48940, Spain
| | - Ahmad Shaabani
- Faculty
of Chemistry, Shahid Beheshti University, Tehran, Iran
| | - Takashi Hayashita
- Department
of Materials and Life Sciences, Faculty of Science and Technology, Sophia University, 7-1, Kioi-cho, Chiyoda-ku, Tokyo 102-8554, Japan
| | - Hassan Namazi
- Research
Laboratory of Dendrimers and Natural Polymers, Faculty of Chemistry, University of Tabriz, P.O. Box 51666, Tabriz, Iran
- Research
Center for Pharmaceutical Nanotechnology (RCPN), Tabriz University of Medical Science, Tabriz, Iran
| | - Abolfazl Heydari
- Polymer
Institute of the Slovak Academy of Sciences, Dúbravská cesta 9, 845 41 Bratislava, Slovakia
- National
Institute of Rheumatic Diseases, Nábrežie I. Krasku 4782/4, 921 12 Piešt’any, Slovakia
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2
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He T, Wen F, Yang Y, Le X, Liu W, Lee C. Emerging Wearable Chemical Sensors Enabling Advanced Integrated Systems toward Personalized and Preventive Medicine. Anal Chem 2023; 95:490-514. [PMID: 36625107 DOI: 10.1021/acs.analchem.2c04527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Tianyiyi He
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore.,Center for Intelligent Sensors and MEMS, National University of Singapore, Block E6 #05-11, 5 Engineering Drive 1, Singapore 117608, Singapore
| | - Feng Wen
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore.,Center for Intelligent Sensors and MEMS, National University of Singapore, Block E6 #05-11, 5 Engineering Drive 1, Singapore 117608, Singapore
| | - Yanqin Yang
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore.,Center for Intelligent Sensors and MEMS, National University of Singapore, Block E6 #05-11, 5 Engineering Drive 1, Singapore 117608, Singapore
| | - Xianhao Le
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore.,Center for Intelligent Sensors and MEMS, National University of Singapore, Block E6 #05-11, 5 Engineering Drive 1, Singapore 117608, Singapore
| | - Weixin Liu
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore.,Center for Intelligent Sensors and MEMS, National University of Singapore, Block E6 #05-11, 5 Engineering Drive 1, Singapore 117608, Singapore
| | - Chengkuo Lee
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117583, Singapore.,Center for Intelligent Sensors and MEMS, National University of Singapore, Block E6 #05-11, 5 Engineering Drive 1, Singapore 117608, Singapore
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3
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Leitão C, Pereira SO, Marques C, Cennamo N, Zeni L, Shaimerdenova M, Ayupova T, Tosi D. Cost-Effective Fiber Optic Solutions for Biosensing. BIOSENSORS 2022; 12:575. [PMID: 36004971 PMCID: PMC9405647 DOI: 10.3390/bios12080575] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/22/2022] [Accepted: 07/22/2022] [Indexed: 05/13/2023]
Abstract
In the last years, optical fiber sensors have proven to be a reliable and versatile biosensing tool. Optical fiber biosensors (OFBs) are analytical devices that use optical fibers as transducers, with the advantages of being easily coated and biofunctionalized, allowing the monitorization of all functionalization and detection in real-time, as well as being small in size and geometrically flexible, thus allowing device miniaturization and portability for point-of-care (POC) testing. Knowing the potential of such biosensing tools, this paper reviews the reported OFBs which are, at the moment, the most cost-effective. Different fiber configurations are highlighted, namely, end-face reflected, unclad, D- and U-shaped, tips, ball resonators, tapered, light-diffusing, and specialty fibers. Packaging techniques to enhance OFBs' application in the medical field, namely for implementing in subcutaneous, percutaneous, and endoscopic operations as well as in wearable structures, are presented and discussed. Interrogation approaches of OFBs using smartphones' hardware are a great way to obtain cost-effective sensing approaches. In this review paper, different architectures of such interrogation methods and their respective applications are presented. Finally, the application of OFBs in monitoring three crucial fields of human life and wellbeing are reported: detection of cancer biomarkers, detection of cardiovascular biomarkers, and environmental monitoring.
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Affiliation(s)
- Cátia Leitão
- i3N, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal; (S.O.P.); (C.M.)
| | - Sónia O. Pereira
- i3N, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal; (S.O.P.); (C.M.)
| | - Carlos Marques
- i3N, Department of Physics, University of Aveiro, 3810-193 Aveiro, Portugal; (S.O.P.); (C.M.)
| | - Nunzio Cennamo
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy; (N.C.); (L.Z.)
| | - Luigi Zeni
- Department of Engineering, University of Campania Luigi Vanvitelli, Via Roma 29, 81031 Aversa, Italy; (N.C.); (L.Z.)
| | - Madina Shaimerdenova
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (M.S.); (T.A.)
| | - Takhmina Ayupova
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (M.S.); (T.A.)
| | - Daniele Tosi
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (M.S.); (T.A.)
- Laboratory of Biosensors and Bioinstruments, National Laboratory Astana, Nur-Sultan 010000, Kazakhstan
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4
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Amantayeva A, Adilzhanova N, Issatayeva A, Blanc W, Molardi C, Tosi D. Fiber Optic Distributed Sensing Network for Shape Sensing-Assisted Epidural Needle Guidance. BIOSENSORS 2021; 11:bios11110446. [PMID: 34821662 PMCID: PMC8615863 DOI: 10.3390/bios11110446] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 05/30/2023]
Abstract
Epidural anesthesia is a pain management process that requires the insertion of a miniature needle through the epidural space located within lumbar vertebrae. The use of a guidance system for manual insertion can reduce failure rates and provide increased efficiency in the process. In this work, we present and experimentally assess a guidance system based on a network of fiber optic distributed sensors. The fibers are mounted externally to the needle, without blocking its inner channel, and through a strain-to-shape detection method reconstruct the silhouette of the epidural device in real time (1 s). We experimentally assessed the shape sensing methods over 25 experiments performed in a phantom, and we observed that the sensing system correctly identified bending patterns typical in epidural insertions, characterized by the different stiffness of the tissues. By studying metrics related to the curvatures and their temporal changes, we provide identifiers that can potentially serve for the (in)correct identification of the epidural space, and support the operator through the insertion process by recognizing the bending patterns.
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Affiliation(s)
- Aida Amantayeva
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (A.A.); (N.A.); (C.M.)
| | - Nargiz Adilzhanova
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (A.A.); (N.A.); (C.M.)
| | - Aizhan Issatayeva
- Department of Engineering and Architecture, University of Parma, Parco Area delle Scienze 181/A, I-43124 Parma, Italy;
| | - Wilfried Blanc
- Université Côte d’Azur, INPHYNI, CNRS UMR7010, Avenue Joseph Vallot, 06108 Nice, France;
| | - Carlo Molardi
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (A.A.); (N.A.); (C.M.)
| | - Daniele Tosi
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan; (A.A.); (N.A.); (C.M.)
- National Laboratory Astana, Laboratory of Biosensors and Bioinstruments, Nur-Sultan 010000, Kazakhstan
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5
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Bekmurzayeva A, Ashikbayeva Z, Myrkhiyeva Z, Nugmanova A, Shaimerdenova M, Ayupova T, Tosi D. Label-free fiber-optic spherical tip biosensor to enable picomolar-level detection of CD44 protein. Sci Rep 2021; 11:19583. [PMID: 34599251 PMCID: PMC8486867 DOI: 10.1038/s41598-021-99099-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 09/20/2021] [Indexed: 12/11/2022] Open
Abstract
Increased level of CD44 protein in serum is observed in several cancers and is associated with tumor burden and metastasis. Current clinically used detection methods of this protein are time-consuming and use labeled reagents for analysis. Therefore exploring new label-free and fast methods for its quantification including its detection in situ is of importance. This study reports the first optical fiber biosensor for CD44 protein detection, based on a spherical fiber optic tip device. The sensor is easily fabricated from an inexpensive material (single-mode fiber widely used in telecommunication) in a fast and robust manner through a CO2 laser splicer. The fabricated sensor responded to refractive index change with a sensitivity of 95.76 dB/RIU. The spherical tip was further functionalized with anti-CD44 antibodies to develop a biosensor and each step of functionalization was verified by an atomic force microscope. The biosensor detected a target of interest with an achieved limit of detection of 17 pM with only minor signal change to two control proteins. Most importantly, concentrations tested in this work are very broad and are within the clinically relevant concentration range. Moreover, the configuration of the proposed biosensor allows its potential incorporation into an in situ system for quantitative detection of this biomarker in a clinical setting.
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Affiliation(s)
- Aliya Bekmurzayeva
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan.
- National Laboratory Astana, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan.
| | - Zhannat Ashikbayeva
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan.
| | - Zhuldyz Myrkhiyeva
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
| | - Aigerim Nugmanova
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
| | - Madina Shaimerdenova
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
| | - Takhmina Ayupova
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
| | - Daniele Tosi
- School of Engineering and Digital Sciences, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
- National Laboratory Astana, Nazarbayev University, Nur-Sultan, 010000, Kazakhstan
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6
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Lemmerman LR, Das D, Higuita-Castro N, Mirmira RG, Gallego-Perez D. Nanomedicine-Based Strategies for Diabetes: Diagnostics, Monitoring, and Treatment. Trends Endocrinol Metab 2020; 31:448-458. [PMID: 32396845 PMCID: PMC7987328 DOI: 10.1016/j.tem.2020.02.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 01/31/2020] [Accepted: 02/03/2020] [Indexed: 12/13/2022]
Abstract
Traditional methods for diabetes management require constant and tedious glucose monitoring (GM) and insulin injections, impacting quality of life. The global diabetic population is expected to increase to 439 million, with approximately US$490 billion in healthcare expenditures by 2030, imposing a significant burden on healthcare systems worldwide. Recent advances in nanotechnology have emerged as promising alternative strategies for the management of diabetes. For example, implantable nanosensors are being developed for continuous GM, new nanoparticle (NP)-based imaging approaches that quantify subtle changes in β cell mass can facilitate early diagnosis, and nanotechnology-based insulin delivery methods are being explored as novel therapies. Here, we provide a holistic summary of this rapidly advancing field compiling all aspects pertaining to the management of diabetes.
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Affiliation(s)
- Luke R Lemmerman
- The Ohio State University, Department of Biomedical Engineering, Columbus, OH 43210, USA
| | - Devleena Das
- The Ohio State University, Department of Biomedical Engineering, Columbus, OH 43210, USA
| | - Natalia Higuita-Castro
- The Ohio State University, Department of Biomedical Engineering, Columbus, OH 43210, USA; The Ohio State University, Department of Surgery, Columbus, OH 43210, USA
| | - Raghavendra G Mirmira
- The University of Chicago, Kovler Diabetes Center and the Department of Medicine, Chicago, IL 60637, USA
| | - Daniel Gallego-Perez
- The Ohio State University, Department of Biomedical Engineering, Columbus, OH 43210, USA; The Ohio State University, Department of Surgery, Columbus, OH 43210, USA.
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7
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Smith JT, Yao R, Sinsuebphon N, Rudkouskaya A, Un N, Mazurkiewicz J, Barroso M, Yan P, Intes X. Fast fit-free analysis of fluorescence lifetime imaging via deep learning. Proc Natl Acad Sci U S A 2019; 116:24019-24030. [PMID: 31719196 PMCID: PMC6883809 DOI: 10.1073/pnas.1912707116] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Fluorescence lifetime imaging (FLI) provides unique quantitative information in biomedical and molecular biology studies but relies on complex data-fitting techniques to derive the quantities of interest. Herein, we propose a fit-free approach in FLI image formation that is based on deep learning (DL) to quantify fluorescence decays simultaneously over a whole image and at fast speeds. We report on a deep neural network (DNN) architecture, named fluorescence lifetime imaging network (FLI-Net) that is designed and trained for different classes of experiments, including visible FLI and near-infrared (NIR) FLI microscopy (FLIM) and NIR gated macroscopy FLI (MFLI). FLI-Net outputs quantitatively the spatially resolved lifetime-based parameters that are typically employed in the field. We validate the utility of the FLI-Net framework by performing quantitative microscopic and preclinical lifetime-based studies across the visible and NIR spectra, as well as across the 2 main data acquisition technologies. These results demonstrate that FLI-Net is well suited to accurately quantify complex fluorescence lifetimes in cells and, in real time, in intact animals without any parameter settings. Hence, FLI-Net paves the way to reproducible and quantitative lifetime studies at unprecedented speeds, for improved dissemination and impact of FLI in many important biomedical applications ranging from fundamental discoveries in molecular and cellular biology to clinical translation.
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Affiliation(s)
- Jason T Smith
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180;
| | - Ruoyang Yao
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180
| | - Nattawut Sinsuebphon
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180
| | - Alena Rudkouskaya
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY 12208
| | - Nathan Un
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180
| | - Joseph Mazurkiewicz
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, NY 12208
| | - Margarida Barroso
- Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY 12208
| | - Pingkun Yan
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180
| | - Xavier Intes
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180;
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8
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Locke A, Means AK, Dong P, Nichols TJ, Coté GL, Grunlan MA. A Layer-by-Layer Approach To Retain a Fluorescent Glucose Sensing Assay within the Cavity of a Hydrogel Membrane. ACS APPLIED BIO MATERIALS 2018; 1:1319-1327. [PMID: 30474080 PMCID: PMC6247246 DOI: 10.1021/acsabm.8b00267] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 10/10/2018] [Indexed: 02/03/2023]
Abstract
A continuous glucose monitoring device that resides fully in the subcutaneous tissue has the potential to greatly improve the management of diabetes. Toward this goal, we have developed a competitive binding glucose sensing assay based on fluorescently labeled PEGylated concanavalin-A (PEGylated-TRITC-ConA) and mannotetraose (APTS-MT). In the present work, we sought to contain this assay within the hollow central cavity of a cylindrical hydrogel membrane, permitting eventual subcutaneous implantation and optical probing through the skin. A "self-cleaning" hydrogel was utilized because of its ability to cyclically deswell/reswell in vivo, which is expected to reduce biofouling and therefore extend the sensor lifetime. Thus, we prepared a hollow, cylindrical hydrogel based on a thermoresponsive electrostatic double network design composed of N-isopropylacrylamide and 2-acrylamido-2-methylpropanesulfonic acid. Next, a layer-by-layer (LbL) coating was applied to the inner wall of the central cavity of the cylindrical membrane. It consisted of 5, 10, 15, 30, or 40 alternating bilayers of positively charged poly(diallyldimethylammonium chloride) and negatively charged poly(sodium 4-styrenesulfonate). With 30 bilayers, the leaching of the smaller-sized component of the assay (APTS-MT) from the membrane cavity was substantially reduced. Moreover, this LbL coating maintained glucose diffusion across the hydrogel membrane. In terms of sensor functionality, the assay housed in the hydrogel membrane cavity tracked changes in glucose concentration (0 to 600 mg/dL) with a mean absolute relative difference of ∼11%.
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Affiliation(s)
- Andrea
K. Locke
- Department
of Biomedical Engineering, Department of Materials Science
and Engineering, Department of Chemistry, and Center for Remote Healthcare Technologies, Texas A&M University, College Station, Texas 77843-3120, United States
| | - Anna Kristen Means
- Department
of Biomedical Engineering, Department of Materials Science
and Engineering, Department of Chemistry, and Center for Remote Healthcare Technologies, Texas A&M University, College Station, Texas 77843-3120, United States
| | - Ping Dong
- Department
of Biomedical Engineering, Department of Materials Science
and Engineering, Department of Chemistry, and Center for Remote Healthcare Technologies, Texas A&M University, College Station, Texas 77843-3120, United States
| | - Tyler J. Nichols
- Department
of Biomedical Engineering, Department of Materials Science
and Engineering, Department of Chemistry, and Center for Remote Healthcare Technologies, Texas A&M University, College Station, Texas 77843-3120, United States
| | - Gerard L. Coté
- Department
of Biomedical Engineering, Department of Materials Science
and Engineering, Department of Chemistry, and Center for Remote Healthcare Technologies, Texas A&M University, College Station, Texas 77843-3120, United States
| | - Melissa A. Grunlan
- Department
of Biomedical Engineering, Department of Materials Science
and Engineering, Department of Chemistry, and Center for Remote Healthcare Technologies, Texas A&M University, College Station, Texas 77843-3120, United States
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9
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Polley N, Pal SK. Medical diagnosis and remote sensing at fiber-tip: picosecond resolved FRET sensor. ACTA ACUST UNITED AC 2016. [DOI: 10.1117/12.2207588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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10
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Hassan HU, Nielsen K, Aasmul S, Bang O. Polymer optical fiber compound parabolic concentrator tip for enhanced coupling efficiency for fluorescence based glucose sensors. BIOMEDICAL OPTICS EXPRESS 2015; 6:5008-5020. [PMID: 26713213 PMCID: PMC4679273 DOI: 10.1364/boe.6.005008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 11/16/2015] [Accepted: 11/18/2015] [Indexed: 06/05/2023]
Abstract
We demonstrate that the light excitation and capturing efficiency of fluorescence based fiber-optical sensors can be significantly increased by using a CPC (Compound Parabolic Concentrator) tip instead of the standard plane-cut tip. We use Zemax modelling to find the optimum CPC tip profile and fiber length of a polymer optical fiber diabetes sensor for continuous monitoring of glucose levels. We experimentally verify the improved performance of the CPC tipped sensor and the predicted production tolerances. Due to physical size requirements when the sensor has to be inserted into the body a non-optimal fiber length of 35 mm is chosen. For this length an average improvement in efficiency of a factor of 1.7 is experimentally demonstrated and critically compared to the predicted ideal factor of 3 in terms of parameters that should be improved through production optimization.
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Affiliation(s)
- Hafeez Ul Hassan
- Medtronic R&D Diabetes Denmark A/S, Agern Allé 1, 2970 Horsholm,
Denmark
| | - Kristian Nielsen
- DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby,
Denmark
| | - Soren Aasmul
- Medtronic R&D Diabetes Denmark A/S, Agern Allé 1, 2970 Horsholm,
Denmark
| | - Ole Bang
- DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby,
Denmark
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11
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Avula M, Jones D, Rao AN, McClain D, McGill LD, Grainger DW, Solzbacher F. Local release of masitinib alters in vivo implantable continuous glucose sensor performance. Biosens Bioelectron 2015; 77:149-56. [PMID: 26402593 DOI: 10.1016/j.bios.2015.08.059] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 08/24/2015] [Accepted: 08/25/2015] [Indexed: 11/25/2022]
Abstract
Continuous glucose monitoring (CGM) sensors are often advocated as a clinical solution to improve long-term glycemic control in the context of diabetes. Subcutaneous sensor inflammatory response, fouling and fibrous encapsulation resulting from the host foreign body response (FBR) reduce sensor sensitivity to glucose, eventually resulting in sensor performance compromise and device failure. Several combination device strategies load CGM sensors with drug payloads that release locally to tissue sites to mitigate FBR-mediated sensor failure. In this study, the mast cell-targeting tyrosine kinase inhibitor, masitinib, was released from degradable polymer microspheres delivered from the surfaces of FDA-approved human commercial CGM needle-type implanted sensors in a rodent subcutaneous test bed. By targeting the mast cell c-Kit receptor and inhibiting mast cell activation and degranulation, local masitinib penetration around the CGM to several hundred microns sought to reduce sensor fibrosis to extend CGM functional lifetimes in subcutaneous sites. Drug-releasing and control CGM implants were compared in murine percutaneous implant sites for 21 days using direct-wire continuous glucose reporting. Drug-releasing implants exhibited no significant difference in CGM fibrosis at implant sites but showed relatively stable continuous sensor responses over the study period compared to blank microsphere control CGM implants.
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Affiliation(s)
- M Avula
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA
| | - D Jones
- Department of Internal Medicine, University of Utah, Salt Lake City, UT 84112, USA
| | - A N Rao
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT 84112, USA
| | - D McClain
- Department of Internal Medicine, University of Utah, Salt Lake City, UT 84112, USA
| | - L D McGill
- Associated Regional and University Pathologist Laboratories, University of Utah, Salt Lake City, UT 84112, USA
| | - D W Grainger
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA; Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT 84112, USA.
| | - F Solzbacher
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA; Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, UT 84112, USA
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12
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Huang HL, Lu PH, Yang HC, Lee GD, Li HR, Liao KC. Fiber-optic triggered release of liposome in vivo: implication of personalized chemotherapy. Int J Nanomedicine 2015; 10:5171-84. [PMID: 26316748 PMCID: PMC4542555 DOI: 10.2147/ijn.s85915] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The aim of this research is to provide proof of principle by applying the fiber-optic triggered release of photo-thermally responsive liposomes embedded with gold nanoparticles (AuNPs) using a 200 μm fiber with 65 mW and 532 nm excitation for topical release in vivo. The tunable delivery function can be paired with an apoptosis biosensor based on the same fiber-optic configuration for providing real-time evaluation of chemotherapy efficacy in vivo to perform as a personalized chemotherapy system. The pattern of topical release triggered by laser excitation conveyed through optical fibers was monitored by the increase in fluorescence resulting from the dilution of self-quenching (75 mM) fluorescein encapsulated in liposomes. In in vitro studies (in 37°C phosphate buffer saline), the AuNP-embedded liposomes showed a more efficient triggered release (74.53%±1.63% in 40 minutes) than traditional temperature-responsive liposomes without AuNPs (14.53%±3.17%) or AuNP-liposomes without excitation (21.92%±2.08%) by spectroscopic measurements. Using the mouse xenograft studies, we first demonstrated that the encapsulation of fluorescein in liposomes resulted in a more substantial content retention (81%) in the tumor than for free fluorophores (14%) at 120 minutes after administration from in vivo fluorescence imaging. Furthermore, the preliminary results also suggested the tunable release capability of the system by demonstrating consecutive triggered releases with fiber-optic guided laser excitation.
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Affiliation(s)
- Huei-Ling Huang
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Pei-Hsuan Lu
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Hung-Chih Yang
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Gi-Da Lee
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung, Taiwan ; Department of Radiology, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Han-Ru Li
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung, Taiwan
| | - Kuo-Chih Liao
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung, Taiwan
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13
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Cummins BM, Li M, Locke AK, Birch DJS, Vigh G, Coté GL. Overcoming the aggregation problem: a new type of fluorescent ligand for ConA-based glucose sensing. Biosens Bioelectron 2015; 63:53-60. [PMID: 25058939 PMCID: PMC5106187 DOI: 10.1016/j.bios.2014.07.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Revised: 07/03/2014] [Accepted: 07/05/2014] [Indexed: 10/25/2022]
Abstract
Competitive binding assays based on the lectin Concanavalin A (ConA) have displayed significant potential to serve in continuous glucose monitoring applications. However, to date, this type of fluorescent, affinity-based assay has yet to show the stable, glucose predictive capabilities that are required for such an application. This instability has been associated with the extensive crosslinking between traditionally-used fluorescent ligands (presenting multiple low-affinity moieties) and ConA (presenting multiple binding sites) in free solution. The work herein introduces the design and synthesis of a new type of fluorescent ligand that can avoid this aggregation and allow the assay to be sensitive across the physiologically relevant glucose concentration range. This fluorescent ligand (APTS-MT) presents a single high-affinity trimannose moiety that is recognized by ConA's full binding site and a fluorophore that can effectively track the ligand's equilibrium binding via fluorescent anisotropy. This is confirmed by comparing its measured fluorescent lifetime to experimentally-determined rotational correlation lifetimes of the free and bound populations. Using an assay comprised of 200 nM APTS-MT and 1 µM ConA, the fluorescence anisotropy capably tracks the concentration of monosaccharides that are known to bind to ConA's primary binding site, and the assay displays a MARD of 6.5% across physiologically relevant glucose concentrations. Ultimately, this rationally-designed fluorescent ligand can facilitate the realization of the full potential of ConA-based glucose sensing assays and provide the basis for a new set of competing ligands to be paired with ConA.
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Affiliation(s)
- Brian M Cummins
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA; Department of Physics, University of Strathclyde, Glasgow G1 1XQ, UK.
| | - Mingchien Li
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Andrea K Locke
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - David J S Birch
- Department of Physics, University of Strathclyde, Glasgow G1 1XQ, UK
| | - Gyula Vigh
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Gerard L Coté
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA
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14
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Veiseh O, Tang BC, Whitehead KA, Anderson DG, Langer R. Managing diabetes with nanomedicine: challenges and opportunities. Nat Rev Drug Discov 2015; 14:45-57. [PMID: 25430866 PMCID: PMC4751590 DOI: 10.1038/nrd4477] [Citation(s) in RCA: 341] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Nanotechnology-based approaches hold substantial potential for improving the care of patients with diabetes. Nanoparticles are being developed as imaging contrast agents to assist in the early diagnosis of type 1 diabetes. Glucose nanosensors are being incorporated in implantable devices that enable more accurate and patient-friendly real-time tracking of blood glucose levels, and are also providing the basis for glucose-responsive nanoparticles that better mimic the body's physiological needs for insulin. Finally, nanotechnology is being used in non-invasive approaches to insulin delivery and to engineer more effective vaccine, cell and gene therapies for type 1 diabetes. Here, we analyse the current state of these approaches and discuss key issues for their translation to clinical practice.
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Affiliation(s)
- Omid Veiseh
- 1] Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA. [2] David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA. [3] Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, Massachusetts 02115, USA. [4]
| | - Benjamin C Tang
- 1] David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA. [2] Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, Massachusetts 02115, USA. [3]
| | - Kathryn A Whitehead
- Department of Chemical Engineering, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, Pennsylvania 15213, USA
| | - Daniel G Anderson
- 1] Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA. [2] David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA. [3] Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, Massachusetts 02115, USA. [4] Division of Health Science and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. [5] Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Robert Langer
- 1] Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA. [2] David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA. [3] Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave., Boston, Massachusetts 02115, USA. [4] Division of Health Science and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. [5] Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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15
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Yao J, Yang M, Duan Y. Chemistry, Biology, and Medicine of Fluorescent Nanomaterials and Related Systems: New Insights into Biosensing, Bioimaging, Genomics, Diagnostics, and Therapy. Chem Rev 2014; 114:6130-78. [DOI: 10.1021/cr200359p] [Citation(s) in RCA: 592] [Impact Index Per Article: 59.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jun Yao
- Research
Center of Analytical Instrumentation, Analytical and Testing Center,
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Mei Yang
- Research
Center of Analytical Instrumentation, Analytical and Testing Center,
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yixiang Duan
- Research
Center of Analytical Instrumentation, Analytical and Testing Center,
College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
- Research
Center of Analytical Instrumentation, College of Life Sciences, Sichuan University, Chengdu, Sichuan 610064, China
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16
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Lemon CM, Curtin PN, Somers RC, Greytak AB, Lanning RM, Jain RK, Bawendi MG, Nocera DG. Metabolic tumor profiling with pH, oxygen, and glucose chemosensors on a quantum dot scaffold. Inorg Chem 2014; 53:1900-15. [PMID: 24143874 PMCID: PMC3944830 DOI: 10.1021/ic401587r] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Acidity, hypoxia, and glucose levels characterize the tumor microenvironment rendering pH, pO2, and pGlucose, respectively, important indicators of tumor health. To this end, understanding how these parameters change can be a powerful tool for the development of novel and effective therapeutics. We have designed optical chemosensors that feature a quantum dot and an analyte-responsive dye. These noninvasive chemosensors permit pH, oxygen, and glucose to be monitored dynamically within the tumor microenvironment by using multiphoton imaging.
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Affiliation(s)
- Christopher M. Lemon
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA 02138
| | - Peter N. Curtin
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
| | - Rebecca C. Somers
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
| | - Andrew B. Greytak
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208
| | - Ryan M. Lanning
- Edwin L. Steele Laboratory for Tumor Biology, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA 02114
| | - Rakesh K. Jain
- Edwin L. Steele Laboratory for Tumor Biology, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, 100 Blossom Street, Cox-7, Boston, MA 02114
| | - Moungi G. Bawendi
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139
| | - Daniel G. Nocera
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA 02138
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Cummins BM, Garza JT, Coté GL. Optimization of a Concanavalin A-based glucose sensor using fluorescence anisotropy. Anal Chem 2013; 85:5397-404. [PMID: 23627407 DOI: 10.1021/ac303689j] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
To date, the dependent nature of the recognition and transduction mechanisms in optical glucose sensors based upon Concanavalin A (ConA) has tended to prevent the sensors' full potential from being realized. In this paper, these mechanisms are independently optimized for a given assay configuration in order to decrease the predictive error of a ConA-based glucose sensor and to give a more accurate demonstration of its potential. To this end, we used fluorescence anisotropy as the transduction mechanism to determine the binding of ConA to 4 kDa FITC-dextran by measuring the change in the rotational correlation lifetime between the bound and unbound populations. By tracking the fluorescence anisotropy of this ligand, the ranges of ConA and 4 kDa FITC-dextran concentrations capable of being explored were not limited by the transduction mechanism. Using predetermined association constants, the binding responses to physiological glucose concentrations were predicted for different assay configurations, and experimentally collected fluorescence anisotropy data displayed the predicted trends for these assay configurations. From the experimental results, a calibration fit was generated for the optimized assay configuration to predict the glucose concentrations using the fluorescence anisotropy. This optimized assay displayed a mean standard error of prediction of 7.5 mg/dL (0-300 mg/dL), and 100% of the data points fell within clinically acceptable zones (A and B) upon the Clarke Error Grid Analysis. This indicates that, by independently optimizing the recognition and transduction mechanisms for the final assay configuration, the sensitivity of a competitive binding chemistry using ConA can be appropriately configured for continuous glucose monitoring applications.
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Affiliation(s)
- Brian M Cummins
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.
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18
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Huang X, Li S, Davis E, Leduc C, Ravussin Y, Cai H, Song B, Li D, Accili D, Leibel R, Wang Q, Lin Q. A MEMS differential viscometric sensor for affinity glucose detection in continuous glucose monitoring. JOURNAL OF MICROMECHANICS AND MICROENGINEERING : STRUCTURES, DEVICES, AND SYSTEMS 2013; 23:55020. [PMID: 23956499 PMCID: PMC3743269 DOI: 10.1088/0960-1317/23/5/055020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Micromachined viscometric affinity glucose sensors have been previously demonstrated using vibrational cantilever and diaphragm. These devices featured a single glucose detection module that determines glucose concentrations through viscosity changes of glucose-sensitive polymer solutions. However, fluctuations in temperature and other environmental parameters might potentially affect the stability and reliability of these devices, creating complexity in their applications in subcutaneously implanted continuous glucose monitoring (CGM). To address these issues, we present a MEMS differential sensor that can effectively reject environmental disturbances while allowing accurate glucose detection. The sensor consists of two magnetically driven vibrating diaphragms situated inside microchambers filled with a boronic-acid based glucose-sensing solution and a reference solution insensitive to glucose. Glucose concentrations can be accurately determined by characteristics of the diaphragm vibration through differential capacitive detection. Our in-vitro and preliminary in-vivo experimental data demonstrate the potential of this sensor for highly stable subcutaneous CGM applications.
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Affiliation(s)
- Xian Huang
- Department of Mechanical Engineering, Columbia University, New York, NY 10027
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19
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Heo YJ, Takeuchi S. Towards smart tattoos: implantable biosensors for continuous glucose monitoring. Adv Healthc Mater 2013. [PMID: 23184404 DOI: 10.1002/adhm.201200167] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Diabetes can strike at any age, from childhood to adulthood, and lasts a lifetime. Thus, it is important to find ways to increase the quality of life for diabetic patients through intensive, continuous care of blood glucose concentrations. Glucose biosensors that are implanted under the skin are promising for continuous glucose monitoring because they can constantly read blood glucose concentrations and signal a warning in case of hypo- or hyperglycemia. The demand for subcutaneous glucose biosensors has led to the development of many glucose-sensing principles and sensor designs. This Review covers the effort to develop subcutaneous glucose biosensors, including the glucose-sensing principles, and discusses their current status for in vivo monitoring. In addition, the Review examines the future prospects for intensive diabetes care.
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Affiliation(s)
- Yun Jung Heo
- Institute of Industrial Science, The University of Tokyo, Meguro-ku, Tokyo, Japan
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20
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21
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Müller AJ, Knuth M, Nikolaus KS, Krivánek R, Küster F, Hasslacher C, Auffarth GU. Blood glucose self-monitoring with a long-term subconjunctival glucose sensor. J Diabetes Sci Technol 2013; 7:24-34. [PMID: 23439157 PMCID: PMC3692213 DOI: 10.1177/193229681300700104] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND To evaluate the feasibility of an implantable subconjunctival glucose monitoring system (SGMS) for long-term glucose monitoring, we investigated the in vivo performance of the system. METHOD The SGMS consists of an implantable ocular mini implant (OMI) and a handheld fluorescence photometer. A clinical study was performed on 47 diabetes patients split into two cohorts. Two different types of OMI were used, with and without a biocompatible surface coating. Duration of the study was 1 year. Correlation between capillary blood glucose and SGMS-derived interstitial fluid glucose was investigated during the first 6 months of the study. RESULTS Both OMI types were tolerated well in the eyes of the patients. At the beginning of the study, the SGMS of both cohorts revealed a high accuracy with mean absolute relative difference (MARD) values of 7-12%. The performance of the uncoated OMIs deteriorated within 3 months of wearing time, exhibiting a MARD value of 20%. The performance of the surface-coated OMIs was preserved longer. Glucose correlation measurement with reasonable results (MARD of 14%) could be performed for up to 6 months of wear. CONCLUSIONS The biocompatible surface coating on the OMIs enabled a longer duration of action of up to 6 months compared with 3 months for uncoated implants in a clinical trial.
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22
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Wang XD, Wolfbeis OS. Fiber-Optic Chemical Sensors and Biosensors (2008–2012). Anal Chem 2012; 85:487-508. [DOI: 10.1021/ac303159b] [Citation(s) in RCA: 391] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xu-Dong Wang
- Institute of Analytical Chemistry, Chemo-
and Biosensors, University of Regensburg, D-93040 Regensburg, Germany
| | - Otto S. Wolfbeis
- Institute of Analytical Chemistry, Chemo-
and Biosensors, University of Regensburg, D-93040 Regensburg, Germany
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23
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Huang X, Leduc C, Ravussin Y, Li S, Davis E, Song B, Wang Q, Accili D, Leibel R, Lin Q. Continuous monitoring of glucose in subcutaneous tissue using microfabricated differential affinity sensors. J Diabetes Sci Technol 2012; 6:1436-44. [PMID: 23294791 PMCID: PMC3570886 DOI: 10.1177/193229681200600625] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE We describe miniaturized differential glucose sensors based on affinity binding between glucose and a synthetic polymer. The sensors possess excellent resistance to environmental disturbances and can potentially allow wireless measurements of glucose concentrations within interstitial fluid in subcutaneous tissue for long-term, stable continuous glucose monitoring (CGM). METHODS The sensors are constructed using microelectromechanical systems (MEMS) technology and exploit poly(N-hydroxy-ethyl acrylamide-ran-3-acrylamidophenylboronic acid) (PHEAA-ran-PAAPBA), a glucose-binding polymer with excellent specificity, reversibility, and stability. Two sensing approaches have been investigated, which respectively, use a pair of magnetically actuated diaphragms and perforated electrodes to differentially measure the glucose-binding-induced changes in the viscosity and permittivity of the PHEAA-ran-PAAPBA solution with respect to a reference, glucose-unresponsive polymer solution. RESULTS In vivo characterization of the MEMS affinity sensors were performed by controlling blood glucose concentrations of laboratory mice by exogenous glucose and insulin administration. The sensors experienced an 8-30 min initialization period after implantation and then closely tracked commercial capillary glucose meter readings with time lags ranging from 0-15 min during rapid glucose concentration changes. Clarke error grid plots obtained from sensor calibration suggest that, for the viscometric and dielectric sensors, respectively, approximately 95% (in the hyperglycemic range) and 84% (ranging from hypoglycemic to hyperglycemic glucose concentrations) of measurement points were clinically accurate, while 5% and 16% of the points were clinically acceptable. CONCLUSIONS The miniaturized MEMS sensors explore differential measurements of affinity glucose recognition. In vivo testing demonstrated excellent accuracy and stability, suggesting that the devices hold the potential to enable long-term and reliable CGM in clinical applications.
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Affiliation(s)
- Xian Huang
- Department of Mechanical Engineering, Columbia University, New York, NY 10027, USA.
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24
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Reagentless fluorescent biosensors based on proteins for continuous monitoring systems. Anal Bioanal Chem 2012; 402:3039-54. [DOI: 10.1007/s00216-012-5715-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Accepted: 01/04/2012] [Indexed: 12/23/2022]
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25
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PVA and BSA stabilized silver nanoparticles based surface–enhanced plasmon resonance probes for protein detection. Colloids Surf B Biointerfaces 2011; 85:138-44. [DOI: 10.1016/j.colsurfb.2011.02.012] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 02/04/2011] [Accepted: 02/04/2011] [Indexed: 01/14/2023]
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26
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Saxl T, Khan F, Ferla M, Birch D, Pickup J. A fluorescence lifetime-based fibre-optic glucose sensor using glucose/galactose-binding protein. Analyst 2011; 136:968-72. [DOI: 10.1039/c0an00430h] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Vaddiraju S, Burgess DJ, Tomazos I, Jain FC, Papadimitrakopoulos F. Technologies for continuous glucose monitoring: current problems and future promises. J Diabetes Sci Technol 2010; 4:1540-62. [PMID: 21129353 PMCID: PMC3005068 DOI: 10.1177/193229681000400632] [Citation(s) in RCA: 149] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Devices for continuous glucose monitoring (CGM) are currently a major focus of research in the area of diabetes management. It is envisioned that such devices will have the ability to alert a diabetes patient (or the parent or medical care giver of a diabetes patient) of impending hypoglycemic/hyperglycemic events and thereby enable the patient to avoid extreme hypoglycemic/hyperglycemic excursions as well as minimize deviations outside the normal glucose range, thus preventing both life-threatening events and the debilitating complications associated with diabetes. It is anticipated that CGM devices will utilize constant feedback of analytical information from a glucose sensor to activate an insulin delivery pump, thereby ultimately realizing the concept of an artificial pancreas. Depending on whether the CGM device penetrates/breaks the skin and/or the sample is measured extracorporeally, these devices can be categorized as totally invasive, minimally invasive, and noninvasive. In addition, CGM devices are further classified according to the transduction mechanisms used for glucose sensing (i.e., electrochemical, optical, and piezoelectric). However, at present, most of these technologies are plagued by a variety of issues that affect their accuracy and long-term performance. This article presents a critical comparison of existing CGM technologies, highlighting critical issues of device accuracy, foreign body response, calibration, and miniaturization. An outlook on future developments with an emphasis on long-term reliability and performance is also presented.
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Affiliation(s)
- Santhisagar Vaddiraju
- Nanomaterials Optoelectronics Laboratory, Polymer Program, Institute of Materials Science, University of ConnecticutStorrs, Connecticut
- Biorasis Inc., Technology Incubation Program, University of ConnecticutStorrs, Connecticut
| | - Diane J Burgess
- Department of Pharmaceutical Sciences, University of ConnecticutStorrs, Connecticut
| | - Ioannis Tomazos
- Biorasis Inc., Technology Incubation Program, University of ConnecticutStorrs, Connecticut
| | - Faquir C Jain
- Nanomaterials Optoelectronics Laboratory, Polymer Program, Institute of Materials Science, University of ConnecticutStorrs, Connecticut
| | - Fotios Papadimitrakopoulos
- Nanomaterials Optoelectronics Laboratory, Polymer Program, Institute of Materials Science, University of ConnecticutStorrs, Connecticut
- Department of Chemistry, University of ConnecticutStorrs, Connecticut
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29
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Liao KC, Chang SC, Chiu CY, Chou YH. Acute response in vivo of a fiber-optic sensor for continuous glucose monitoring from canine studies on point accuracy. SENSORS 2010; 10:7789-802. [PMID: 22163627 PMCID: PMC3231153 DOI: 10.3390/s100807789] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Revised: 07/26/2010] [Accepted: 08/05/2010] [Indexed: 11/16/2022]
Abstract
The objective of this study was to evaluate the acute response of Sencil(™), a fiber-optic sensor, in point accuracy for glucose monitoring in vivo on healthy dogs under anesthesia. A total of four dogs with clinically normal glycemia were implanted with one sensor each in the chest region to measure the interstitial glucose concentration during the ovariohysterectomy procedure. The data was acquired every 10 seconds after initiation, and was compared to the concentration of venous plasma glucose sampled during the surgery procedures for accuracy of agreement analysis. In the four trials with a range of 71-297 mg/dL plasma glucose, the collected 21 pairs of ISF readings from the Sencil™ and the plasma reference showed superior dispersion of residue values than the conventional system, and a linear correlation (the Pearson correlation coefficient is 0.9288 and the y-intercept is 14.22 mg/dL). The MAD (17.6 mg/dL) and RMAD (16.16%) of Sencil™ measurements were in the comparable range of the conventional system. The Clarke error grid analysis indicated that 100% of the paired points were in the clinically acceptable zone A (61.9%) and B (38.1%).
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Affiliation(s)
- Kuo-Chih Liao
- Graduate Institute of Biomedical Engineering, National Chung-Hsing University, 250 Kuo-Kuang Rd., Taichung City, 40227, Taiwan; E-Mail: (Y.-H.C.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +886-4-22840734-28; Fax: +886-4-222852422
| | - Shih-Chieh Chang
- Department of Veterinary Medicine / Veterinary Medical Teaching Hospital, National Chung-Hsing University, 250 Kuo-Kuang Rd., Taichung City, 40227, Taiwan; E-Mails: (S.-C.C.); (C.-Y.C.)
| | - Cheng-Yang Chiu
- Department of Veterinary Medicine / Veterinary Medical Teaching Hospital, National Chung-Hsing University, 250 Kuo-Kuang Rd., Taichung City, 40227, Taiwan; E-Mails: (S.-C.C.); (C.-Y.C.)
| | - Yu-Hsiang Chou
- Graduate Institute of Biomedical Engineering, National Chung-Hsing University, 250 Kuo-Kuang Rd., Taichung City, 40227, Taiwan; E-Mail: (Y.-H.C.)
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Delehanty JB, Boeneman K, Bradburne CE, Robertson K, Medintz IL. Quantum dots: a powerful tool for understanding the intricacies of nanoparticle-mediated drug delivery. Expert Opin Drug Deliv 2009; 6:1091-112. [PMID: 19691443 DOI: 10.1517/17425240903167934] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Nanoparticle-mediated drug delivery (NMDD) is an emerging research area that seeks to address many of the pharmacokinetic issues encountered with traditional systemically administered drug therapies. Although the field is still in its infancy, recent research has already highlighted the potential for improved drug delivery and targeted therapeutics; however, the real promise lies in combining drug therapy with diagnostic imaging, nucleic acid delivery/gene therapy and/or biosensing applications all in one engineered nanoparticle vector. In this review, the authors discuss the unique contributions that luminescent semiconductor nanocrystals or quantum dots (QDs) offer for NMDD, how they can function as a powerful nanoscale platform to understand this process at its most basic level, and even provide drug-related properties in certain circumstances. Selected examples from the current literature are utilized to describe both their potential and the contributions they have already made towards the design and implementation of NMDD vectors. Important related issues such as QD biofunctionalization and toxicity are also discussed. The paper concludes with a perspective of how this field can be expected to develop in the future.
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Affiliation(s)
- James B Delehanty
- Center for Bio/Molecular Science and Engineering, SW Washington, DC 20375, USA
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Medintz IL, Mattoussi H. Quantum dot-based resonance energy transfer and its growing application in biology. Phys Chem Chem Phys 2009; 11:17-45. [DOI: 10.1039/b813919a] [Citation(s) in RCA: 485] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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