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Ortiz de Zárate D, Serna S, Ponce-Alcántara S, García-Rupérez J. Evaluation of Mesoporous TiO 2 Layers as Glucose Optical Sensors. SENSORS (BASEL, SWITZERLAND) 2022; 22:5398. [PMID: 35891081 PMCID: PMC9316573 DOI: 10.3390/s22145398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/14/2022] [Accepted: 07/18/2022] [Indexed: 06/15/2023]
Abstract
Porous materials are currently the basis of many optical sensors because of their ability to provide a higher interaction between the light and the analyte, directly within the optical structure. In this study, mesoporous TiO2 layers were fabricated using a bottom-up synthesis approach in order to develop optical sensing structures. In comparison with more typical top-down fabrication strategies where the bulk constitutive material is etched in order to obtain the required porous medium, the use of a bottom-up fabrication approach potentially allows increasing the interconnectivity of the pore network, hence improving the surface and depth homogeneity of the fabricated layer and reducing production costs by synthesizing the layers on a larger scale. The sensing performance of the fabricated mesoporous TiO2 layers was assessed by means of the measurement of several glucose dilutions in water, estimating a limit of detection even below 0.15 mg/mL (15 mg/dL). All of these advantages make this platform a very promising candidate for the development of low-cost and high-performance optical sensors.
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2
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Poghossian A, Schöning MJ. Capacitive Field-Effect EIS Chemical Sensors and Biosensors: A Status Report. SENSORS 2020; 20:s20195639. [PMID: 33023133 PMCID: PMC7584023 DOI: 10.3390/s20195639] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/21/2020] [Accepted: 09/29/2020] [Indexed: 02/07/2023]
Abstract
Electrolyte-insulator-semiconductor (EIS) field-effect sensors belong to a new generation of electronic chips for biochemical sensing, enabling a direct electronic readout. The review gives an overview on recent advances and current trends in the research and development of chemical sensors and biosensors based on the capacitive field-effect EIS structure—the simplest field-effect device, which represents a biochemically sensitive capacitor. Fundamental concepts, physicochemical phenomena underlying the transduction mechanism and application of capacitive EIS sensors for the detection of pH, ion concentrations, and enzymatic reactions, as well as the label-free detection of charged molecules (nucleic acids, proteins, and polyelectrolytes) and nanoparticles, are presented and discussed.
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Affiliation(s)
- Arshak Poghossian
- MicroNanoBio, Liebigstr. 4, 40479 Düsseldorf, Germany
- Correspondence: (A.P.); (M.J.S.)
| | - Michael J. Schöning
- Institute of Nano- and Biotechnologies (INB), FH Aachen, Campus Jülich, Heinrich-Mußmannstr. 1, 52428 Jülich, Germany
- Correspondence: (A.P.); (M.J.S.)
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Garzón V, Pinacho DG, Bustos RH, Garzón G, Bustamante S. Optical Biosensors for Therapeutic Drug Monitoring. BIOSENSORS 2019; 9:E132. [PMID: 31718050 PMCID: PMC6955905 DOI: 10.3390/bios9040132] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 10/30/2019] [Accepted: 11/01/2019] [Indexed: 12/26/2022]
Abstract
Therapeutic drug monitoring (TDM) is a fundamental tool when administering drugs that have a limited dosage or high toxicity, which could endanger the lives of patients. To carry out this monitoring, one can use different biological fluids, including blood, plasma, serum, and urine, among others. The help of specialized methodologies for TDM will allow for the pharmacodynamic and pharmacokinetic analysis of drugs and help adjust the dose before or during their administration. Techniques that are more versatile and label free for the rapid quantification of drugs employ biosensors, devices that consist of one element for biological recognition coupled to a signal transducer. Among biosensors are those of the optical biosensor type, which have been used for the quantification of different molecules of clinical interest, such as antibiotics, anticonvulsants, anti-cancer drugs, and heart failure. This review presents an overview of TDM at the global level considering various aspects and clinical applications. In addition, we review the contributions of optical biosensors to TDM.
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Affiliation(s)
- Vivian Garzón
- Doctoral Programme of Biosciences, Universidad de La Sabana, Chía 140013, Colombia
- Therapeutic Evidence Group, Clinical Pharmacology, Universidad de La Sabana, Chía 140013, Colombia
| | - Daniel G. Pinacho
- Therapeutic Evidence Group, Clinical Pharmacology, Universidad de La Sabana, Chía 140013, Colombia
| | - Rosa-Helena Bustos
- Therapeutic Evidence Group, Clinical Pharmacology, Universidad de La Sabana, Chía 140013, Colombia
| | - Gustavo Garzón
- Faculty of Medicine, Universidad de La Sabana, Chía 140013, Colombia
| | - Sandra Bustamante
- Physics Department, the Centre for NanoHealth, Swansea University, Swansea SA2 8PP, UK
- Vedas, Corporación de Investigación e Innovación, Medellín 050001, Colombia
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Sakota D, Fujiwara T, Ohuchi K, Kuwana K, Yamazaki H, Kosaka R, Nishida M, Mizuno T, Arai H, Maruyama O. Development of a real-time and quantitative thrombus sensor for an extracorporeal centrifugal blood pump by near-infrared light. BIOMEDICAL OPTICS EXPRESS 2018; 9:190-201. [PMID: 29359096 PMCID: PMC5772574 DOI: 10.1364/boe.9.000190] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/07/2017] [Accepted: 12/07/2017] [Indexed: 06/07/2023]
Abstract
We developed an optical thrombus sensor for a monopivot extracorporeal centrifugal blood pump. In this study, we investigated its quantitative performance for thrombus detection in acute animal experiments of left ventricular assist using the pump on pathogen-free pigs. Optical fibers were set in the driver unit of the pump. The incident light at the near-infrared wavelength of 810 nm was aimed at the pivot bearing, and the resulting scattered light was guided to the optical fibers. The detected signal was analyzed to obtain the thrombus formation level. As a result, real-time and quantitative monitoring of the thrombus surface area on the pivot bearing was achieved with an accuracy of 3.6 ± 2.3 mm2. In addition, the sensing method using the near-infrared light was not influenced by changes in the oxygen saturation and the hematocrit. It is expected that the developed sensor will be useful for optimal anticoagulation management for long-term extracorporeal circulation therapies.
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Affiliation(s)
- Daisuke Sakota
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Tatsuki Fujiwara
- Department of Cardiovascular Surgery, Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Katsuhiro Ohuchi
- Department of Advanced Surgical Technology Research and Development, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Katsuyuki Kuwana
- Senko Medical Instrument Mfg. Co., Ltd., 3-23-13 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroyuki Yamazaki
- Optquest Co., Ltd., 1335 Haraichi, Ageo-shi, Saitama 362-0021, Japan
| | - Ryo Kosaka
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Masahiro Nishida
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
| | - Tomohiro Mizuno
- Department of Cardiovascular Surgery, Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
- Department of Advanced Surgical Technology Research and Development, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Hirokuni Arai
- Department of Cardiovascular Surgery, Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Osamu Maruyama
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba-shi, Ibaraki 305-8564, Japan
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Zhao L, Wu M, Xiao C, Yang L, Zhou L, Gao N, Li Z, Chen J, Chen J, Liu J, Qin H, Zhao J. Discovery of an intrinsic tenase complex inhibitor: Pure nonasaccharide from fucosylated glycosaminoglycan. Proc Natl Acad Sci U S A 2015; 112:8284-9. [PMID: 26100870 PMCID: PMC4500213 DOI: 10.1073/pnas.1504229112] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Selective inhibition of the intrinsic coagulation pathway is a promising strategy for developing safer anticoagulants that do not cause serious bleeding. Intrinsic tenase, the final and rate-limiting enzyme complex in the intrinsic coagulation pathway, is an attractive but less explored target for anticoagulants due to the lack of a pure selective inhibitor. Fucosylated glycosaminoglycan (FG), which has a distinct but complicated and ill-defined structure, is a potent natural anticoagulant with nonselective and adverse activities. Herein we present a range of oligosaccharides prepared via the deacetylation-deaminative cleavage of FG. Analysis of these purified oligosaccharides reveals the precise structure of FG. Among these fragments, nonasaccharide is the minimum fragment that retains the potent selective inhibition of the intrinsic tenase while avoiding the adverse effects of native FG. In vivo, the nonasaccharide shows 97% inhibition of venous thrombus at a dose of 10 mg/kg in rats and has no obvious bleeding risk. This nonasaccharide may therefore serve as a novel promising anticoagulant.
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Affiliation(s)
- Longyan Zhao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Mingyi Wu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
| | - Chuang Xiao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lian Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
| | - Lutan Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Na Gao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zi Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
| | - Jun Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
| | - Jianchao Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China
| | - Jikai Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China; School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Hongbo Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China;
| | - Jinhua Zhao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, China;
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Duan X, Rajan NK, Izadi MH, Reed MA. Complementary metal oxide semiconductor-compatible silicon nanowire biofield-effect transistors as affinity biosensors. Nanomedicine (Lond) 2014; 8:1839-51. [PMID: 24156488 DOI: 10.2217/nnm.13.156] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Affinity biosensors use biorecognition elements and transducers to convert a biochemical event into a recordable signal. They provides the molecule binding information, which includes the dynamics of biomolecular association and dissociation, and the equilibrium association constant. Complementary metal oxide semiconductor-compatible silicon (Si) nanowires configured as a field-effect transistor (NW FET) have shown significant advantages for real-time, label-free and highly sensitive detection of a wide range of biomolecules. Most research has focused on reducing the detection limit of Si-NW FETs but has provided less information about the real binding parameters of the biomolecular interactions. Recently, Si-NW FETs have been demonstrated as affinity biosensors to quantify biomolecular binding affinities and kinetics. They open new applications for NW FETs in the nanomedicine field and will bring such sensor technology a step closer to commercial point-of-care applications. This article summarizes the recent advances in bioaffinity measurement using Si-NW FETs, with an emphasis on the different approaches used to address the issues of sensor calibration, regeneration, binding kinetic measurements, limit of detection, sensor surface modification, biomolecule charge screening, reference electrode integration and nonspecific molecular binding.
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Affiliation(s)
- Xuexin Duan
- State Key Laboratory of Precision Measuring Technology & Instruments, Tianjin University, Tianjin 300072, China
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Poghossian A, Schöning MJ. Label-Free Sensing of Biomolecules with Field-Effect Devices for Clinical Applications. ELECTROANAL 2014. [DOI: 10.1002/elan.201400073] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Duan X, Rajan NK, Routenberg DA, Huskens J, Reed MA. Regenerative electronic biosensors using supramolecular approaches. ACS NANO 2013; 7:4014-4021. [PMID: 23566420 PMCID: PMC3665757 DOI: 10.1021/nn306034f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A supramolecular interface for Si nanowire FETs has been developed with the aim of creating regenerative electronic biosensors. The key to the approach is Si-NWs functionalized with β-cyclodextrin (β-CD), to which receptor moieties can be attached with an orthogonal supramolecular linker. Here we demonstrate full recycling using the strongest biomolecular system known, streptavidin (SAv)-biotin. The bound SAv and the linkers can be selectively removed from the surface through competitive desorption with concentrated β-CD, regenerating the sensor for repeated use. An added advantage of β-CD is the possibility of stereoselective sensors, and we demonstrate here the ability to quantify the enantiomeric composition of chiral targets.
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Affiliation(s)
- Xuexin Duan
- Department of Electrical Engineering, Yale University, New Haven, Connecticut 06520, USA
| | - Nitin K. Rajan
- Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
| | - David A. Routenberg
- Department of Electrical Engineering, Yale University, New Haven, Connecticut 06520, USA
| | - Jurriaan Huskens
- Molecular Nanofabrication Group, MESA+ Institute for Nanotechnology, University of Twente, P. O. Box 217, 7500 AE Enschede, The Netherlands
| | - Mark A. Reed
- Department of Electrical Engineering, Yale University, New Haven, Connecticut 06520, USA
- Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
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Khetani A, Tiwari VS, Harb A, Anis H. Monitoring of heparin concentration in serum by Raman spectroscopy within hollow core photonic crystal fiber. OPTICS EXPRESS 2011; 19:15244-15254. [PMID: 21934888 DOI: 10.1364/oe.19.015244] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The feasibility of using hollow core photonic crystal fiber (HC-PCF) in conjunction with Raman spectroscopy has been explored for real time monitoring of heparin concentration in serum. Heparin is an important blood anti-coagulant whose precise monitoring and controlling in patients undergoing cardiac surgery and dialysis is of utmost importance. Our method of heparin monitoring offers a novel alternative to existing clinical procedures in terms of accuracy, response time and sample volume. The optical design configuration simply involves a 785-nm laser diode whose light is coupled into HC-PCF filled with heparin-serum mixtures. By non-selectively filling HC-PCF, a strong modal field overlap is obtained. Consequently, an enhanced Raman signal (>90 times) is obtained from various heparin-serum mixtures filled HC-PCFs compared to its bulk counterpart (cuvette). The present scheme has the potential to serve as a 'generic biosensing tool' for diagnosing a wide range of biological samples.
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Affiliation(s)
- Altaf Khetani
- School of Information Technology and Engineering, University of Ottawa, 800 King Edward, PO Box 450, Ottawa, Ontario K1N 6N5, Canada.
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Bechmann LP, Wichert M, Kröger K, Hilgard P. Dosing and monitoring of low-molecular-weight heparin in cirrhotic patients. Liver Int 2011; 31:1064. [PMID: 21733100 DOI: 10.1111/j.1478-3231.2011.02548.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Rico S, Antonijoan RM, Gich I, Borrell M, Fontcuberta J, Monreal M, Martinez-Gonzalez J, Barbanoj MJ. Safety assessment and pharmacodynamics of a novel ultra low molecular weight heparin (RO-14) in healthy volunteers--a first-time-in-human single ascending dose study. Thromb Res 2011; 127:292-8. [PMID: 21257196 DOI: 10.1016/j.thromres.2010.12.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Revised: 12/14/2010] [Accepted: 12/15/2010] [Indexed: 10/18/2022]
Abstract
INTRODUCTION RO-14 is a novel ultra low molecular heparin. The purpose of this study was to evaluate the safety and pharmacodynamic profile of RO-14 in healthy males. MATERIALS AND METHODS We conducted a two-stage, single-center, open-label, randomized study. Two cohorts of 6 volunteers were randomly assigned to 12 single, ascending subcutaneous doses (1750-19950IU of anti-FXa activity) in an alternating crossover fashion. Safety was assessed by spontaneous/elicited adverse events, medical examination and laboratory tests. Anti-FXa activity and anti-FIIa activity were assessed throughout the 24hours after dosing. Dose proportionality and linearity of the anti-FXa activity were evaluated. RESULTS All doses were well tolerated and there were no bleeding events. At the lowest dose, anti-FXa activity A(max) was 0.16 (±0.02) IU/mL and AUC(0-24) was 1.11 (±0.24) IU*h/mL, At the highest dose anti-FXa activity A(max) was 1.67 (±0.15) IU/mL; AUC(0-24) was 21.48 (±4.46) IU*h/mL and t½ was 8.05h. Mean T(max) (all doses) was 2.86 (±0.39) h. RO-14 showed proportional and linear pharmacodynamics [normalized A(max) among doses (p=0.594) and normalized AUC(0-24) (p=0.092), correlations between A(max-)dose (R(2)=0.89, p<0.001) and AUC(0-24)-dose (R(2)=0.86, p<0.001)]. Anti-FIIa activity was below the detection limit (0.1IU/ml) at all dose levels. No clinically significant changes were observed in the platelet count, APTT, PT, TT, fibrinogen and antithrombin. CONCLUSIONS In this phase I study, RO-14 exhibited a good safety profile, anti-FXa activity for either prophylaxis or treatment of venous thromboembolism, linear pharmacodynamics, a longer elimination half-life than currently marketed low molecular weight heparin and no anti-FIIa activity.
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Affiliation(s)
- Salvador Rico
- Centre d'lnvestigació de Medicaments, Institute of Biomedical Research (IIB Sant Pau), Barcelona, Spain.
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Bechmann LP, Sichau M, Wichert M, Gerken G, Kröger K, Hilgard P. Low-molecular-weight heparin in patients with advanced cirrhosis. Liver Int 2011; 31:75-82. [PMID: 20958919 DOI: 10.1111/j.1478-3231.2010.02358.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND & AIMS The use of low-molecular-weight heparins (LMWH) in patients with advanced liver diseases is frequently avoided because of the enhanced risk of bleeding complications. However, many patients with impaired liver function are at a high risk of thrombosis or have an indication for therapeutic anticoagulation. Therefore, the aim of this study was to evaluate the pharmacokinetics of LMWH in patients with cirrhosis. METHODS Eighty-four consecutive patients with cirrhosis and a clinical indication for prophylactic or therapeutic anticoagulation were included. The LMWH doses were chosen according to current guidelines. Antifactor Xa activity (anti-Xa) was assessed on two consecutive days, 4 h after drug administration. The severity of liver disease was quantified using Child-Turcotte-Pugh score, the MELD score and clinical features and was correlated with the anti-Xa value and the occurrence of complications. RESULTS Antifactor Xa activity was negatively correlated with the severity of the liver disease, and a positive correlation was observed between antithrombin-III (AT) levels and anti-Xa value. AT itself was negatively correlated with the severity of liver disease. Seven patients had an episode of variceal bleeding. No patient died during the observation interval and no thromboembolic events occurred. CONCLUSION Prophylactic use of LMWH in patients with cirrhosis appears to be safe. A decreased anti-Xa value in cirrhotic patients and a negative correlation with liver function challenge the unconditional use of anti-Xa assays in LMWH monitoring in cirrhotic patients and reveals a potential limitation of anti-Xa analysis in these patients. Low levels of AT, because of reduced hepatic synthesis, are the most likely cause of this phenomenon.
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Affiliation(s)
- Lars P Bechmann
- Department of Gastroenterology and Hepatology, University-Hospital Essen, Essen, Germany
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Maurer J, Haselbach S, Klein O, Baykut D, Vogel V, Mäntele W. Analysis of the Complex Formation of Heparin with Protamine by Light Scattering and Analytical Ultracentrifugation: Implications for Blood Coagulation Management. J Am Chem Soc 2010; 133:1134-40. [DOI: 10.1021/ja109699s] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jürgen Maurer
- Institute of Biophysics, Johann Wolfgang Goethe-University Frankfurt, Max von Laue-Strasse 1, 60438 Frankfurt am Main, Germany
| | - Stephanie Haselbach
- Institute of Biophysics, Johann Wolfgang Goethe-University Frankfurt, Max von Laue-Strasse 1, 60438 Frankfurt am Main, Germany
| | - Oliver Klein
- Institute of Biophysics, Johann Wolfgang Goethe-University Frankfurt, Max von Laue-Strasse 1, 60438 Frankfurt am Main, Germany
| | - Doan Baykut
- Institute of Biophysics, Johann Wolfgang Goethe-University Frankfurt, Max von Laue-Strasse 1, 60438 Frankfurt am Main, Germany
| | - Vitali Vogel
- Institute of Biophysics, Johann Wolfgang Goethe-University Frankfurt, Max von Laue-Strasse 1, 60438 Frankfurt am Main, Germany
| | - Werner Mäntele
- Institute of Biophysics, Johann Wolfgang Goethe-University Frankfurt, Max von Laue-Strasse 1, 60438 Frankfurt am Main, Germany
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14
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Lin Q, Yan J, Qiu F, Song X, Fu G, Ji J. Heparin/collagen multilayer as a thromboresistant and endothelial favorable coating for intravascular stent. J Biomed Mater Res A 2010; 96:132-41. [DOI: 10.1002/jbm.a.32820] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Revised: 02/06/2010] [Accepted: 02/09/2010] [Indexed: 11/07/2022]
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15
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Roy S, Chen X, Li MH, Peng Y, Anariba F, Gao Z. Mass-Produced Nanogap Sensor Arrays for Ultrasensitive Detection of DNA. J Am Chem Soc 2009; 131:12211-7. [DOI: 10.1021/ja901704t] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Somenath Roy
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore 138669
| | - Xiaojun Chen
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore 138669
| | - Mo-Huang Li
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore 138669
| | - Yanfen Peng
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore 138669
| | - Franklin Anariba
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore 138669
| | - Zhiqiang Gao
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, Singapore 138669
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Song YS, Moon S, Hulli L, Hasan SK, Kayaalp E, Demirci U. Microfluidics for cryopreservation. LAB ON A CHIP 2009; 9:1874-81. [PMID: 19532962 PMCID: PMC2719835 DOI: 10.1039/b823062e] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Minimizing cell damage throughout the cryopreservation process is critical to enhance the overall outcome. Osmotic shock sustained during the loading and unloading of cryoprotectants (CPAs) is a major source of cell damage during the cryopreservation process. We introduce a microfluidic approach to minimize osmotic shock to cells during cryopreservation. This approach allows us to control the loading and unloading of CPAs in microfluidic channels using diffusion and laminar flow. We provide a theoretical explanation of how the microfluidic approach minimizes osmotic shock in comparison to conventional cryopreservation protocols via cell membrane transport modeling. Finally, we show that biological experiments are consistent with the proposed mathematical model. The results indicate that our novel microfluidic-based approach improves post-thaw cell survivability by up to 25% on average over conventional cryopreservation protocols. The method developed in this study provides a platform to cryopreserve cells with higher viability, functionality, and minimal inter-technician variability. This method introduces microfluidic technologies to the field of biopreservation, opening the door to future advancements at the interface of these fields.
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Affiliation(s)
- Young S Song
- Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Bioengineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
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17
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Pu Q, Elazazy MS, Alvarez JC. Label-free detection of heparin, streptavidin, and other probes by pulsed streaming potentials in plastic microfluidic channels. Anal Chem 2008; 80:6532-6. [PMID: 18666781 DOI: 10.1021/ac8003117] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this paper, pulsed streaming potentials generated in plastic microfluidic channels are used for the label-free detection of some model analytes. The microchannels are fabricated with the commodity plastic cyclic olefin copolymer (COC), and the detection signal arises from a change in the surface charge upon analyte adsorption on the modified microchannel surface. The role of the surface modification is to confer the microchannel with a predetermined charge and a particular specificity toward the adsorption of the target analyte. In this work, several target probes displaying different levels of specificity were investigated. Heparin and streptavidin were detected by adsorption on microchannel surfaces modified with protamine and biotin, respectively, whereas bovine serum albumin (BSA) and methylene blue (MB) showed nonspecific adsorption on almost any modified or unmodified COC microchannel surface. The magnitude of the streaming potential was found to be proportional to the liquid pressure and the surface charge of the microchannel in accord with the Smoluchowski equation. Because the relative polarity of the streaming potential is determined by the surface charge, the most straightforward detection with this method occurs when the charge is reversed upon analyte adsorption. This strategy was used for the species described in this work, and the lowest concentrations detected were approximately 0.01 units/mL for heparin (below clinical relevance), approximately 10 (-9) M for BSA, and approximately 10 (-6) M for MB. Unlike the conventional method of steady flow, in this work, the streaming potentials were measured under pulsed conditions of flow and using nonreference electrodes. This approach removes the need of special electrolytes as it is usually required when using reference electrodes, and at the same time, it mitigates the interference of electrochemical drift from the electrodes. Relative standard deviations of approximately 1-2% and measuring times of approximately 10 s are readily attained with this experimental setup. The on-channel modification of the surface was carried out by UV-photografting methods given the significant UV transparency of COC.
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Affiliation(s)
- Qiaosheng Pu
- Virginia Commonwealth University, P.O. Box 842006, Richmond, Virginia 23284, USA
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Rodgers PJ, Jing P, Kim Y, Amemiya S. Electrochemical recognition of synthetic heparin mimetic at liquid/liquid microinterfaces. J Am Chem Soc 2008; 130:7436-42. [PMID: 18479109 DOI: 10.1021/ja800568q] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electrochemically controlled molecular recognition of a synthetic heparin mimetic, Arixtra, at nitrobenzene/water microinterfaces was investigated to obtain a greater understanding of interfacial recognition and sensing of heparin and its analogues with biomedical importance. In contrast to unfractionated heparin, this synthetic pentasaccharide that mimics the unique Antithrombin III binding domain of heparin possesses well-defined structure and ionic charge to enable quantitative interpretation of cyclic voltammetric/chronoamperometric responses based on the interfacial recognition at micropipet electrodes. Arixtra is electrochemically extracted from the water phase into the bulk nitrobenzene phase containing highly lipophilic ionophores, methyltridodecylammonium or dimethyldioctadecylammonium. Numerical analysis of the kinetically controlled cyclic voltammograms demonstrates for the first time that formal potentials and standard rate constants of polyion transfer at liquid/liquid interfaces are ionophore dependent. Moreover, octadecylammonium and octadecylguanidinium are introduced as new, simple ionophores to model recognition sites of heparin-binding proteins at liquid/liquid interfaces. In comparison to octadecyltrimethylammonium, the best ionophore for heparin recognition at liquid/liquid interfaces reported so far, these new ionophores dramatically facilitate Arixtra adsorption at the interfaces. With a saline solution at physiological pH, an Arixtra molecule is selectively and cooperatively bound to 5 molecules of the guanidinium ionophore, suggesting hydrogen-bond-directed interactions of each guanidinium with a few of 10 negatively charged sulfo or carboxyl groups of Arixtra at the interfaces.
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Affiliation(s)
- Patrick J Rodgers
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania, 15260, USA
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Squires TM, Messinger RJ, Manalis SR. Making it stick: convection, reaction and diffusion in surface-based biosensors. Nat Biotechnol 2008; 26:417-26. [DOI: 10.1038/nbt1388] [Citation(s) in RCA: 703] [Impact Index Per Article: 43.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Neue Methode zur Direkten Bestimmung der Heparinkonzentration im Blut. ZEITSCHRIFT FUR HERZ THORAX UND GEFASSCHIRURGIE 2007. [DOI: 10.1007/s00398-007-0582-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Affiliation(s)
- Jimena C Sauceda
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
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Hou CSJ, Godin M, Payer K, Chakrabarti R, Manalis SR. Integrated microelectronic device for label-free nucleic acid amplification and detection. LAB ON A CHIP 2007; 7:347-54. [PMID: 17330166 DOI: 10.1039/b617082j] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We present an integrated microelectronic device for amplification and label-free detection of nucleic acids. Amplification by polymerase chain reaction (PCR) is achieved with on-chip metal resistive heaters, temperature sensors, and microfluidic valves. We demonstrate a rapid thermocycling with rates of up to 50 degrees C s(-1) and a PCR product yield equivalent to that of a bench-top system. Amplicons within the PCR product are detected by their intrinsic charge with a silicon field-effect sensor. Similar to existing optical approaches with intercalators such as SYBR Green, our sensing approach can directly detect standard double-stranded PCR product, while in contrast, our sensor does not require labeling reagents. By combining amplification and detection on the same device, we show that the presence or absence of a particular DNA sequence can be determined by converting the analog surface potential output of the field-effect sensor to a simple digital true/false readout.
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Affiliation(s)
- Chih-Sheng Johnson Hou
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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