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Nangare S, Patil S, Patil A, Deshmukh P, Patil P. Bovine serum albumin-derived poly-L-glutamic acid-functionalized graphene quantum dots embedded UiO-66-NH2 MOFs as a fluorescence ‘On-Off-On’ magic gate for para-aminohippuric acid sensing. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Woolf MS, Dignan LM, Karas SM, Lewis HM, Hadley KC, Nauman AQ, Gates-Hollingsworth MA, AuCoin DP, Green HR, Geise GM, Landers JP. Characterization of a Centrifugal Microfluidic Orthogonal Flow Platform. MICROMACHINES 2022; 13:mi13030487. [PMID: 35334778 PMCID: PMC8950265 DOI: 10.3390/mi13030487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/01/2022] [Accepted: 03/09/2022] [Indexed: 11/16/2022]
Abstract
To bring to bear the power of centrifugal microfluidics on vertical flow immunoassays, control of flow orthogonally through nanoporous membranes is essential. The on-disc approach described here leverages the rapid print-cut-laminate (PCL) disc fabrication and prototyping method to create a permanent seal between disc materials and embedded nanoporous membranes. Rotational forces drive fluid flow, replacing capillary action, and complex pneumatic pumping systems. Adjacent microfluidic features form a flow path that directs fluid orthogonally (vertically) through these embedded membranes during assay execution. This method for membrane incorporation circumvents the need for solvents (e.g., acetone) to create the membrane-disc bond and sidesteps issues related to undesirable bypass flow. In other recently published work, we described an orthogonal flow (OF) platform that exploited embedded membranes for automation of enzyme-linked immunosorbent assays (ELISAs). Here, we more fully characterize flow patterns and cellulosic membrane behavior within the centrifugal orthogonal flow (cOF) format. Specifically, high-speed videography studies demonstrate that sample volume, membrane pore size, and ionic composition of the sample matrix significantly impact membrane behavior, and consequently fluid drainage profiles, especially when cellulosic membranes are used. Finally, prototype discs are used to demonstrate proof-of-principle for sandwich-type antigen capture and immunodetection within the cOF system.
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Affiliation(s)
- Michael Shane Woolf
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA; (L.M.D.); (S.M.K.); (H.M.L.); (K.C.H.); (A.Q.N.); (J.P.L.)
- Correspondence:
| | - Leah M. Dignan
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA; (L.M.D.); (S.M.K.); (H.M.L.); (K.C.H.); (A.Q.N.); (J.P.L.)
| | - Scott M. Karas
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA; (L.M.D.); (S.M.K.); (H.M.L.); (K.C.H.); (A.Q.N.); (J.P.L.)
| | - Hannah M. Lewis
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA; (L.M.D.); (S.M.K.); (H.M.L.); (K.C.H.); (A.Q.N.); (J.P.L.)
| | - Kevyn C. Hadley
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA; (L.M.D.); (S.M.K.); (H.M.L.); (K.C.H.); (A.Q.N.); (J.P.L.)
| | - Aeren Q. Nauman
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA; (L.M.D.); (S.M.K.); (H.M.L.); (K.C.H.); (A.Q.N.); (J.P.L.)
- TeGrex Technologies, Charlottesville, VA 22903, USA
| | | | - David P. AuCoin
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22904, USA; (M.A.G.-H.); (D.P.A.); (H.R.G.)
| | - Heather R. Green
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22904, USA; (M.A.G.-H.); (D.P.A.); (H.R.G.)
| | - Geoffrey M. Geise
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22904, USA;
| | - James P. Landers
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA; (L.M.D.); (S.M.K.); (H.M.L.); (K.C.H.); (A.Q.N.); (J.P.L.)
- Department of Mechanical Engineering, University of Virginia, Charlottesville, VA 22904, USA
- Department of Pathology, University of Virginia, Charlottesville, VA 22904, USA
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Property modulation of the alginate-based hydrogel via semi-interpenetrating polymer network (semi-IPN) with poly(vinyl alcohol). Int J Biol Macromol 2021; 193:1068-1077. [PMID: 34798186 DOI: 10.1016/j.ijbiomac.2021.11.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 10/26/2021] [Accepted: 11/10/2021] [Indexed: 11/22/2022]
Abstract
Hydrogels have been demonstrated as an attractive tool due to their extraordinary water-absorbing property. Specifically, hydrogels composed of natural polymers like polysaccharides have long been the ideal candidate because they are abundant, affordable, biocompatible, and biodegradable. However, there are unmet requirements in some practical applications because they are usually brittle and unstable. Most efforts to enhance their stability have caused unintended loss of inherent advantages, including biocompatibility and biodegradability. To balance this trade-off, here we investigate the way to modulate the property of alginate-based hydrogels by hybridizing with poly(vinyl alcohol) (PVA) via a semi-interpenetrating polymer network (semi-IPN). Thanks to the synergetic effect between alginate and PVA with a semi-IPN structure, the advantages of the alginate-based hydrogel were substantially preserved while its disadvantages were comparatively covered. We tested the stimuli-responsive behavior, degradability, mechanical stability, and physicochemical stability of the present hydrogel and verified their property was modulated by the hybridization ratio between alginate and PVA. Thereafter, long-term durability was also evaluated under a non-ideal and complex aqueous environment to prove their physiological stability enough to outlast under practical or engineering conditions. Considering that the properties were by and large controllable without losing the advantages of polysaccharides, we anticipate the present approach for the hydrogel design and property tuning methods paves the way for the value-added applications for natural hydrogels in various fields.
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Dignan LM, Woolf MS, Ross JA, Baehr C, Holstege CP, Pravetoni M, Landers JP. A Membrane-Modulated Centrifugal Microdevice for Enzyme-Linked Immunosorbent Assay-Based Detection of Illicit and Misused Drugs. Anal Chem 2021; 93:16213-16221. [PMID: 34807557 DOI: 10.1021/acs.analchem.1c04102] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Increased opioid use and misuse have imposed large analytical demands across clinical and forensic sectors. Due to the absence of affordable, accurate, and simple on-site tests (e.g., point of interdiction and bedside), analysis is primarily conducted in centralized laboratories via time-consuming, labor-intensive methods. Many healthcare facilities do not have such analytical capabilities and must send samples to commercial laboratories, increasing turnaround time and care costs, as well as delaying public health warnings regarding the emergence of specific substances. Enzyme-linked immunosorbent assays (ELISAs) are used ubiquitously, despite lengthy workflows that require substantial manual intervention. Faster, reliable analytics are desperately needed to mitigate the mortality and morbidity associated with the current substance use epidemic. We describe one such alternative─a portable centrifugal microfluidic ELISA system that supplants repetitive pipetting with rotationally controlled fluidics. Embedded cellulosic membranes act as microvalves, permitting flow only when centrifugally generated hydraulic pressure exceeds their liquid entry pressure. These features enable stepwise reagent introduction, incubation, and removal simply by tuning rotational frequency. We demonstrate the success of this platform through sensitive, specific colorimetric detection of opiates, a subclass of opioids naturally derived from the opium poppy. Objective image analysis eliminated subjectivity in human color perception and permitted reliable detection of opiates in buffer and artificial urine at the ng/μL range. Opiates were clearly differentiated from other drug classes without interference from common adulterants known to cause false positive results in current colorimetric field tests. Eight samples were simultaneously analyzed in under 1 h, a marked reduction from the traditional multiday timeline. This approach could permit rapid, automatable ELISA-based drug detection outside of traditional laboratories by nontechnical personnel.
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Affiliation(s)
- Leah M Dignan
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - M Shane Woolf
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Jennifer A Ross
- Department of Emergency Medicine, University of Virginia School of Medicine, Charlottesville, Virginia 22903, United States
| | - Carly Baehr
- Department of Pharmacology, University of Minnesota Medical School, Minneapolis, Minnesota 55455, United States
| | - Christopher P Holstege
- Department of Emergency Medicine, University of Virginia School of Medicine, Charlottesville, Virginia 22903, United States
| | - Marco Pravetoni
- Department of Pharmacology, University of Minnesota Medical School, Minneapolis, Minnesota 55455, United States
| | - James P Landers
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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Koc H, Kilicay E, Karahaliloglu Z, Hazer B, Denkbas EB. Prevention of urinary infection through the incorporation of silver-ricinoleic acid-polystyrene nanoparticles on the catheter surface. J Biomater Appl 2021; 36:385-405. [PMID: 33530824 DOI: 10.1177/0885328220983552] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Nosocominal infections associated with biofilm formation on urinary catheters cause serious complications. The aim of this study was to investigate the feasibility of the polyurethane (PU) catheter modified with tetracycline hydrochloride (TCH) attached Ag nanoparticles embedded PolyRicinoleic acid-Polystyrene Nanoparticles (PU-TCH-AgNPs-PRici-PS NPs) and the influence on antimicrobial and antibiofilm activity of urinary catheters infected by Escherichia coli and Staphylococcus aureus. For this purpose, AgNPs embedded PRici graft PS graft copolymers (AgNPs-PRici-g-PS) were synthesized via free radical polymerization and characterized by FTIR, HNMR and DSC. AgNPs-PRici-PS NPs were prepared and optimized by the different parameters and the optimized size of nanoparticle was found as about 150 ± 1 nm. The characterization of the nanoparticles and the morphological evaluation were carried out by FTIR and SEM. Short term stability of nanoparticles was realised at 4°C for 30 days. In vitro release profiles of TCH and Ag NPs were also investigated. The formation of biofilm on PU modified TCH-Ag NPs-PRici-PS NPs, was evaluated and the biocompatibility test of the nanoparticles was realized via the mouse fibroblast (L929) and mouse urinary bladder cells (G/G An1). This is the first time that TCH-AgNPs-PRici-PS NPs used in the modification of PU catheter demonstrated high antimicrobial and antibiofilm activities against the urinary tract infection.
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Affiliation(s)
- Hazal Koc
- Nanotechnology Engineering Department, Institute of Science, Bülent Ecevit University, Zonguldak, Turkey
| | - Ebru Kilicay
- Vocational School of Eldivan Health Services, Karatekin University, Cankiri, Turkey
| | | | - Baki Hazer
- Department of Aircraft Airflame Engine Maintenance, Kapadokya University, Ürgüp, Turkey.,Department of Chemistry, Bulent Ecevit University, Zonguldak, Turkey
| | - Emir B Denkbas
- Bioengineering Division, Institute of Pure and Applied Sciences, Hacettepe University, Ankara, Turkey.,Faculty of Engineering, Department of Biomedical Engineering, Başkent University, Ankara, Turkey
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Shimada K, Kikura H, Takahashi H, Ikeda R. Novel Adhesion Technique Using Metallic or Non-Metallic Hydrous Oxide of Metal Complexes Involving Magnetic Compound Fluid Rubber under Electrolytic Polymerization and Magnetic Field for Producing Sensors. SENSORS 2019; 19:s19030689. [PMID: 30744006 PMCID: PMC6386866 DOI: 10.3390/s19030689] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/04/2019] [Accepted: 02/04/2019] [Indexed: 11/16/2022]
Abstract
As per sequential studies on new types of soft rubber for the artificial skin of robots, smart sensors, etc., we have proposed and investigated hybrid skin (H-Skin) and haptic sensors by using magnetic compound fluid (MCF), compounding natural rubber latex (NR-latex), and applying electric and magnetic fields. Through electrolytic polymerization, the MCF rubber is solidified. The MCF rubber has hybrid sensing functions and photovoltaic effects, and electric charge as battery. In case of the production of soft rubber sensors, however, the problem of adhesion between metal electrodes and rubber is very important. In the present study, we propose a novel adhesive technique for bonding the metal electrodes and MCF rubber by using metallic or non-metallic hydrous oxide, which is a metal complex, via electrolytic polymerization. The anionic radical hydrate reacts with the isoprene molecules of NR-latex or chloroprene rubber latex (CR-latex) such that they are cross-linked and the MCF rubber with the hydrate is solidified, which can be represented via a chemical reaction equation. By means of this adhesive technique, we presented five cases of sensors fabricated using metal electrodes and rubbers. This technique is applicable for novel cohesion between rubber and metal.
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Affiliation(s)
- Kunio Shimada
- Faculty of Symbiotic Systems Sciences, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan.
| | - Hiroshige Kikura
- Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
| | - Hideharu Takahashi
- Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
| | - Ryo Ikeda
- Institute of Innovative Research, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
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Shiba S, Maruyama R, Kamata T, Kato D, Niwa O. Chromatographic Determination of Sugar Probes Used for Gastrointestinal Permeability Test by Employing Nickel-Copper Nanoalloy Embedded in Carbon Film Electrodes. ELECTROANAL 2018. [DOI: 10.1002/elan.201800072] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shunsuke Shiba
- Advanced Science Research Laboratory; Saitama Institute of Technology, Fusaiji, 1690, Fukaya; Saitama 369-0293 Japan
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba; Ibaraki 305-8566 Japan
- Graduate School of Pure and Applied Sciences; University of Tsukuba, 1-1-1 Tennodai, Tsukuba; Ibaraki 305-8573 Japan
| | - Rina Maruyama
- Advanced Science Research Laboratory; Saitama Institute of Technology, Fusaiji, 1690, Fukaya; Saitama 369-0293 Japan
| | - Tomoyuki Kamata
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba; Ibaraki 305-8566 Japan
| | - Dai Kato
- National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba; Ibaraki 305-8566 Japan
| | - Osamu Niwa
- Advanced Science Research Laboratory; Saitama Institute of Technology, Fusaiji, 1690, Fukaya; Saitama 369-0293 Japan
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Stability of simulated body fluids such as blood plasma, artificial urine and artificial saliva. Microchem J 2017. [DOI: 10.1016/j.microc.2017.06.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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