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Asci C, Sharma A, Del-Rio-Ruiz R, Sonkusale S. Ingestible pH sensing device for gastrointestinal health monitoring based on thread-based electrochemical sensors. Mikrochim Acta 2023; 190:385. [PMID: 37698743 DOI: 10.1007/s00604-023-05946-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 08/11/2023] [Indexed: 09/13/2023]
Abstract
There exists a strong correlation between the pH levels of the gastrointestinal (GI) tract and GI diseases such as inflammatory bowel disease (IBS), ulcerative colitis, and pancreatis. Existing methods for diagnosing many GI diseases predominantly rely on invasive, expensive, and time-consuming techniques such as colonoscopy and endoscopy. In this study, an autonomous ingestible smart biosensing system in a pill format with integrated pH sensors is reported. The smart sensing pills will measure the pH profile as they transit through the GI tract. The data is then downloaded from the pills after they are collected from the feces. The sensor is based on electrodeposited PANI on carbon-coated conductive threads providing high pH sensitivity. Engineering innovations allowed integration of thread-based sensors on 3D-printed pill surfaces with front-end readout electronics, memory, and microcontroller assembled on mm-size circular printed circuit boards. The entire smart sensing pill possesses an overall length of 22.1 mm and an outer diameter of 9 mm. The modular biosensing system allows integration of thread-based biosensors to monitor other biomarkers in GI tract that mitigates the complex sensor fabrication process as well as overall pill assembly.
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Affiliation(s)
- Cihan Asci
- Department of Electrical and Computer Engineering, Tufts University, 161 College Ave, Medford, 02155, MA, USA
| | - Atul Sharma
- Department of Electrical and Computer Engineering, Tufts University, 161 College Ave, Medford, 02155, MA, USA
| | - Ruben Del-Rio-Ruiz
- Department of Electrical and Computer Engineering, Tufts University, 161 College Ave, Medford, 02155, MA, USA
| | - Sameer Sonkusale
- Department of Electrical and Computer Engineering, Tufts University, 161 College Ave, Medford, 02155, MA, USA.
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2
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Yeruva T, Yang S, Doski S, Duncan GA. Hydrogels for Mucosal Drug Delivery. ACS APPLIED BIO MATERIALS 2023; 6:1684-1700. [PMID: 37126538 DOI: 10.1021/acsabm.3c00050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Mucosal tissues are often a desirable site of drug action to treat disease and engage the immune system. However, systemically administered drugs suffer from limited bioavailability in mucosal tissues where technologies to enable direct, local delivery to these sites would prove useful. In this Spotlight on Applications article, we discuss hydrogels as an attractive means for local delivery of therapeutics to address a range of conditions affecting the eye, nose, oral cavity, gastrointestinal, urinary bladder, and vaginal tracts. Considering the barriers to effective mucosal delivery, we provide an overview of the key parameters in the use of hydrogels for these applications. Finally, we highlight recent work demonstrating their use for inflammatory and infectious diseases affecting these tissues.
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Affiliation(s)
- Taj Yeruva
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Sydney Yang
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Shadin Doski
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
| | - Gregg A Duncan
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, United States
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3
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Waimin J, Gopalakrishnan S, Heredia-Rivera U, Kerr NA, Nejati S, Gallina NLF, Bhunia AK, Rahimi R. Low-Cost Nonreversible Electronic-Free Wireless pH Sensor for Spoilage Detection in Packaged Meat Products. ACS APPLIED MATERIALS & INTERFACES 2022; 14:45752-45764. [PMID: 36173396 DOI: 10.1021/acsami.2c09265] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Contamination of meat with pathogenic microorganisms can cause severe illnesses and food waste, which has significant negative impacts on both general health and the economy. In many cases, the expiration date is not a good indicator of meat freshness as there is a high risk of contamination during handling throughout the supply chain. Many biomarkers, including color, odor, pH, temperature, and volatile compounds, are used to determine spoilage. Among these, pH presents a simple and effective biomarker directly linked to the overgrowth of bacteria and degradation of the meat tissue. Low-cost methods for wireless pH monitoring are crucial in detecting spoilage on a large commercial scale. Existing technologies are often limited to short-range detection, with the use of batteries and different electronic components that increases both the manufacturing complexity and cost of the final device. To address these shortcomings, we have developed a cost-effective wireless pH sensor, which uses passive resonant frequency (RF) sensing, combined with a pH-responsive polymer that can be placed within packaged meat products and provide a remote assessment of the risk of microbial spoilage throughout the supply chain. The sensor tag consists of a sensing resonator coated with a pH-sensitive material and a passivated reference resonator operating in a differential frequency configuration. Upon exposure to elevated pH levels >6.8, the coating on the sensing resonator dissolves, which in turn results in a distinct change in the resonant frequency with respect to the reference resonator. Systematic theoretical and experimental results at different pH levels demonstrated that a 20% shift in resonant frequency demarcates the point for spoilage detection. As a proof of concept, the performance of the sensor in remotely detecting the risk of food spoilage was validated in packaged poultry over 10 days. The sensor fabrication process takes advantage of recent developments in the scalable manufacturing of flexible, low-cost devices, including selective laser etching of metalized plastic films and doctor-blade coating of stimuli-responsive polymer films. Furthermore, the biocompatibility of all the materials used in the sensor was confirmed with human intestinal cells (HCT-8 cells).
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Affiliation(s)
- Jose Waimin
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sarath Gopalakrishnan
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Ulisses Heredia-Rivera
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Nicholas A Kerr
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sina Nejati
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Nicholas L F Gallina
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, Indiana 47907, United States
| | - Arun K Bhunia
- Molecular Food Microbiology Laboratory, Department of Food Science, Purdue University, West Lafayette, Indiana 47907, United States
- Department of Comparative Pathobiology, Purdue University, West Lafayette, Indiana 47907, United States
- Purdue Institute of Inflammation Immunology and Infectious Disease, Purdue University, West Lafayette, Indiana 47907, United States
| | - Rahim Rahimi
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
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4
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Fukada K, Tajima T, Seyama M. Thermally Degradable Inductors with Water-Resistant Metal Leaf/Oleogel Wires and Gelatin/Chitosan Hydrogel Films. ACS APPLIED MATERIALS & INTERFACES 2022; 14:44697-44703. [PMID: 36095329 DOI: 10.1021/acsami.2c12380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Ingestible electronics monitor biometric information from outside the body. Making them with harmless or digestible materials will contribute to further reducing the burden on the patient's oral intake. Here, considering that the inductive part plays an important role in communications, we demonstrate a degradable inductor fabricated with harmless substances. Such a transient component must meet conflicting requirements for both operation and disassembly. Therefore, we integrated a substrate made of gelatin, a thermally degradable material, and a precision coil pattern made of edible gold or silver leaf. However, gelatin itself lost its initial shape easily due to quick sol-gel changes in physiological conditions. Thus, we managed the gelatin's thermal responsiveness by using a tangle of gelatin/chitosan gel networks and genipin, an organic cross-linking agent, and gained insights into the criteria for developing transient devices with thermo-degradability. In addition, to compensate for the lack of water resistance and low conductivity of thin metal foils, we propose a laminated structure with oleogel (beeswax/olive oil). LCR resonance circuits, by connecting a commercial capacitor to the coil, worked wirelessly in the megahertz band and gradually degraded in a warm-water environment. The presented organic electronics will contribute to the future development of transient wireless communications for implantable and ingestible medical devices or environmental sensors with natural and harmless ingredients.
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Affiliation(s)
- Kenta Fukada
- NTT Device Technology Laboratories, NTT Corporation, 3-1 Morinosato, Wakamiya, Atsugi, Kanagawa 243-0198, Japan
| | - Takuro Tajima
- NTT Device Technology Laboratories, NTT Corporation, 3-1 Morinosato, Wakamiya, Atsugi, Kanagawa 243-0198, Japan
| | - Michiko Seyama
- NTT Device Technology Laboratories, NTT Corporation, 3-1 Morinosato, Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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Qureshi AUR, Arshad N, Rasool A, Islam A, Rizwan M, Haseeb M, Rasheed T, Bilal M. Chitosan and carrageenan‐based biocompatible hydrogel platforms for cosmeceutical, drug delivery and biomedical applications. STARCH-STARKE 2022. [DOI: 10.1002/star.202200052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Nasima Arshad
- School of Chemistry University of the Punjab Lahore 54590 Pakistan
| | - Atta Rasool
- School of Chemistry University of the Punjab Lahore 54590 Pakistan
| | - Atif Islam
- Department of Polymer Engineering and Technology University of the Punjab Lahore 54590 Pakistan
| | - Muhammad Rizwan
- Department of Chemistry The University of Lahore Lahore 54000 Pakistan
| | - Muhammad Haseeb
- Department of Chemistry The University of Lahore Lahore 54000 Pakistan
| | - Tahir Rasheed
- Interdisciplinary Research Center for Advanced Materials King Fahd University of Petroleum and Minerals (KFUPM) Dhahran 31261 Saudi Arabia
| | - Muhammad Bilal
- School of Life Science and Food Engineering Huaiyin Institute of Technology Huai'an 223003 China
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Salih AE, Elsherif M, Alam F, Chiesa M, Butt H. Rapid Colorimetric pH-Responsive Gold Nanocomposite Hydrogels for Sensing Applications. NANOMATERIALS 2022; 12:nano12091486. [PMID: 35564192 PMCID: PMC9101415 DOI: 10.3390/nano12091486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/21/2022] [Accepted: 04/22/2022] [Indexed: 12/10/2022]
Abstract
Surface functionalization of metallic nanoparticles (NPs) with external groups can be engineered to fabricate sensors that are responsive to various stimuli like temperature, pH, and numerous ions. Herein, we report the synthesis of gold nanoparticles (GNPs) functionalized with 3-mercaptopropionic acid (GNPs-MPA) and the doping of these nanoparticles into hydrogel materials using the breathing-in/breathing-out (BI-BO) method. MPA has a carboxyl group that becomes protonated and, thus, ionized at a pH below its pKa (4.32); hence, the GNPs-MPA solutions and gels were mostly pH-responsive in the range of 3–5. Optical properties were assessed through ultraviolet-visible (UV-Vis) spectroscopy, namely: transmission and absorption, and the parameters used to quantify the pH changes were the full width at half maximum (FWHM) and position of surface plasmon resonance (SPR). The solutions and gels gradually changed their colors from red to indigo with pH decrementation from 5 to 3, respectively. Furthermore, the solutions’ and doped gels’ highest FWHM sensitivities towards pH variations were 20 nm and 55 nm, respectively, while the SPR’s position sensitivities were 18 nm and 10 nm, respectively. Also, transmission and scanning electron microscopy showed synchronized dispersion and aggregation of NPs with pH change in both solution and gel forms. The gel exhibited excellent repeatability and reversibility properties, and its response time was instantaneous, which makes its deployment as a colorimetric pH-triggered sensor practical. To the best of our knowledge, this is the first study that has incorporated GNPs into hydrogels utilizing the BI-BO method and demonstrated the pH-dependent optical and colorimetric properties of the developed nanocomposites.
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Affiliation(s)
- Ahmed E. Salih
- Department of Mechanical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates; (M.E.); (F.A.); (M.C.)
- Correspondence: (A.E.S.); (H.B.)
| | - Mohamed Elsherif
- Department of Mechanical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates; (M.E.); (F.A.); (M.C.)
| | - Fahad Alam
- Department of Mechanical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates; (M.E.); (F.A.); (M.C.)
| | - Matteo Chiesa
- Department of Mechanical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates; (M.E.); (F.A.); (M.C.)
- Department of Physics and Technology, UiT The Arctic University of Norway, 9010 Tromsø, Norway
| | - Haider Butt
- Department of Mechanical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates; (M.E.); (F.A.); (M.C.)
- Correspondence: (A.E.S.); (H.B.)
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7
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Ye D, Xue J, Yuan S, Zhang F, Song S, Wang J, Meng MQH. Design and Control of a Magnetically-Actuated Capsule Robot with Biopsy Function. IEEE Trans Biomed Eng 2022; 69:2905-2915. [PMID: 35259093 DOI: 10.1109/tbme.2022.3157451] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Wireless capsule endoscopy has been well used for gastrointestinal (GI) tract diagnosis. However, it can only obtain images and cannot take samples of GI tract tissues. In this study, we designed a magnetically-actuated biopsy capsule (MABC) robot for GI tract diagnosis. METHODS The proposed robot can achieve locomotion and biopsy functions under the control of external electromagnetic actuation (EMA) system. Two types of active locomotion can be achieved, plane motion refers to the robot rolling on the surface of the GI tract with a rotating uniform magnetic field. 3D motion refers to the robot moving in 3D space under the control of the EMA system. After reaching the target position, the biopsy needle can be sprung out for sampling and then retracted under a gradient magnetic field. RESULTS A pill-shaped robot prototype (15mm 32mm) has been fabricated and tested with phantom experiments. The average motion control error is 0.32mm in vertical direction, 3.3mm in horizontal direction, and the maximum sampling error is about 5.0mm. The average volume of the sampled tissue is about 0.35mm3. CONCLUSION We designed a MABC robot and proposed a control framework which enables planar and 3D spatial locomotion and biopsy sampling. SIGNIFICANCE The untethered MABC robot can be remotely controlled to achieve accurate sampling in multiple directions without internal power sources, paving the way towards precision sampling techniques for GI diseases in clinical procedures.
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8
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Fukada K, Tajima T, Seyama M. Thermoresponsive Gelatin/Chitosan Hydrogel Films for a Degradable Capacitor. ACS APPLIED MATERIALS & INTERFACES 2021; 13:59006-59011. [PMID: 34817996 DOI: 10.1021/acsami.1c14905] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Ingestible electronic devices are tools for exploring the condition of the gastrointestinal tract and adjacent organs without a burden on the patients. Making them safe requires that they be fabricated with harmless materials. In this study, we developed a capacitor using food materials for a wireless sensing component. As a safer approach, gelatin, an ingredient responsive to external stimuli, was selected as a substrate for deforming the device at the desired time. Gelatin experiences sol-gel changes near body temperature; however, it is instantly dissolved and is not suitable for long-term use in the body. Thus, to maintain its thermal responsiveness, we used a tangle of gel networks created by mixing gelatin and chitosan without cross-linking agents. Our search for the appropriate gel mixing ratio provided insights into the criteria for achieving slow sol-gel changes and how to improve the thermal durability. We transferred a sputtered gold film onto the gel films to produce electrodes and then made a capacitor by sandwiching a naturally dried sodium polyacrylate film between the electrodes. The resonance frequency measurement of RLC circuits in combination with commercial plane coils showed that the capacitor worked in the megahertz band and that it collapsed when immersed in hot water. Gastric acid detection was also achieved with this capacitor. This electronic part will contribute to the development of implanted or ingestible medical devices and a wide range of environmental sensors composed of natural ingredients.
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Affiliation(s)
- Kenta Fukada
- NTT Device Technology Labs, NTT Corporation 3-1 Morinosato, Wakamiya, Atsugi, Kanagawa 243-0198, Japan
| | - Takuro Tajima
- NTT Device Technology Labs, NTT Corporation 3-1 Morinosato, Wakamiya, Atsugi, Kanagawa 243-0198, Japan
| | - Michiko Seyama
- NTT Device Technology Labs, NTT Corporation 3-1 Morinosato, Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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9
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Ghosh A, Li L, Xu L, Dash RP, Gupta N, Lam J, Jin Q, Akshintala V, Pahapale G, Liu W, Sarkar A, Rais R, Gracias DH, Selaru FM. Gastrointestinal-resident, shape-changing microdevices extend drug release in vivo. SCIENCE ADVANCES 2020; 6:6/44/eabb4133. [PMID: 33115736 PMCID: PMC7608789 DOI: 10.1126/sciadv.abb4133] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Accepted: 09/11/2020] [Indexed: 05/05/2023]
Abstract
Extended-release gastrointestinal (GI) luminal delivery substantially increases the ease of administration of drugs and consequently the adherence to therapeutic regimens. However, because of clearance by intrinsic GI motility, device gastroretention and extended drug release over a prolonged duration are very challenging. Here, we report that GI parasite-inspired active mechanochemical therapeutic grippers, or theragrippers, can reside within the GI tract of live animals for 24 hours by autonomously latching onto the mucosal tissue. We also observe a notable sixfold increase in the elimination half-life using theragripper-mediated delivery of a model analgesic ketorolac tromethamine. These results provide first-in-class evidence that shape-changing and self-latching microdevices enhance the efficacy of extended drug delivery.
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Affiliation(s)
- Arijit Ghosh
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Ling Li
- Division of Gastroenterology and Hepatology, Department of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Liyi Xu
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Ranjeet P Dash
- Johns Hopkins Drug Discovery, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Neha Gupta
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Jenny Lam
- Johns Hopkins Drug Discovery, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Qianru Jin
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Venkata Akshintala
- Division of Gastroenterology and Hepatology, Department of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Gayatri Pahapale
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Wangqu Liu
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Anjishnu Sarkar
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Rana Rais
- Johns Hopkins Drug Discovery, Baltimore, MD 21205, USA
- Department of Neurology, Johns Hopkins University, Baltimore, MD 21205, USA
| | - David H Gracias
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA.
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
- Department of Chemistry, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Florin M Selaru
- Division of Gastroenterology and Hepatology, Department of Medicine, Johns Hopkins University, Baltimore, MD 21205, USA.
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10
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Li Y, Li P, Lu J, Zhao Y. Synthesis of pH-, thermo- and salt-responsive hydrogels containing MCM-41 as crosslinker in situ for controlled drug release. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03325-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Jiang H, Carter NM, Zareei A, Nejati S, Waimin JF, Chittiboyina S, Niedert EE, Soleimani T, Lelièvre SA, Goergen CJ, Rahimi R. A Wireless Implantable Strain Sensing Scheme Using Ultrasound Imaging of Highly Stretchable Zinc Oxide/Poly Dimethylacrylamide Nanocomposite Hydrogel. ACS APPLIED BIO MATERIALS 2020; 3:4012-4024. [PMID: 35025476 DOI: 10.1021/acsabm.9b01032] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hongjie Jiang
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907-2035, United States
- Shenzhen MSU-BIT University, Shenzhen, Guangdong 518172, China
| | - Natalie M. Carter
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Amin Zareei
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Sina Nejati
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Jose F. Waimin
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Shirisha Chittiboyina
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States
- Department of Basic Medical Sciences, Purdue University, 625 Harrison Street, West Lafayette, Indiana 47907, United States
| | - Elizabeth E. Niedert
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907-2032, United States
| | - Tahereh Soleimani
- College of Human Medicine, Michigan State University, East Lansing, Michigan 48824, United States
| | - Sophie A. Lelièvre
- Department of Basic Medical Sciences, Purdue University, 625 Harrison Street, West Lafayette, Indiana 47907, United States
| | - Craig J. Goergen
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 47907-2032, United States
- Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907-2032, United States
| | - Rahim Rahimi
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907-2035, United States
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
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12
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Liu H, Li X, Wei T, Xu S, Chen S, Cheng SH, Sun D. Precise Drug Delivery by Using PLGA-Based Microspheres and Optical Manipulators. IEEE Trans Nanobioscience 2019; 19:192-202. [PMID: 31831429 DOI: 10.1109/tnb.2019.2958820] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The accurate delivery of precise amounts of drugs to a specific location can considerably affect various clinical applications. The precise control of drug amount and position is crucial to a successful drug delivery. This paper proposes the use of poly(lactide-co-glycolicacid) (PLGA)-based microspheres to contain precise amounts of drugs and an optical tweezer manipulator to transport these drug-containing microspheres to their targeted sites in vivo. The drugs were delivered by the PLGA-based microspheres to the yolk sac of zebrafish embryos, and a sustained drug release was observed to examine the anti-angiogenesis and angiogenesis activities. The PLGA-based microspheres degraded in zebrafish, thereby verifying that these microspheres can be used as drug carriers in vivo to ensure good biocompatibility and biodegradation. The proposed precise drug delivery approach can be used in protein tests and drug property characterization in vivo.
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13
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Jiang H, Ochoa M, Waimin JF, Rahimi R, Ziaie B. A pH-regulated drug delivery dermal patch for targeting infected regions in chronic wounds. LAB ON A CHIP 2019; 19:2265-2274. [PMID: 31179468 DOI: 10.1039/c9lc00206e] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This work presents a low-cost, passive, flexible, polymeric pump for topical drug delivery which uses wound pH as a trigger for localized drug release. Its operation relies on a pH-responsive hydrogel actuator which swells when exposed to the alkaline pH of an infected wound. The pump enables slow release (<0.1 μL min-1) of aqueous anti-bacterial solution for up to 4 hours and sustains against up to 8 kPa of backpressure. Featuring a scalable layer-by-layer fabrication technique to expand the pump into a 2 × 2 array, the device can dispense 50 μl onto a 160 mm2 dermal coverage within 4 hours. Robustness tests show that when integrated within a medical adhesive, the device can be worn around the forearm and can withstand various daily activities (non-intensive) for up to 12 hours. In vitro experiments demonstrate a 58 times decrease of live P. aeruginosa after 24 hours of the pump assisted antibiotics treatment.
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Affiliation(s)
- Hongjie Jiang
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA.
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