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Shaker F, Razi S, Rezaei N. Circulating miRNA and circulating tumor DNA application as liquid biopsy markers in gastric cancer. Clin Biochem 2024; 129:110767. [PMID: 38705444 DOI: 10.1016/j.clinbiochem.2024.110767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/30/2024] [Accepted: 05/02/2024] [Indexed: 05/07/2024]
Abstract
Liquid biopsy has been investigated as a novel method to overcome the numerous challenges in gastric cancer (GC) management. This non-invasive, feasible, and easy-to-repeat method has been shown to be cost-effective and capable of increasing diagnostic sensitivity and prognostic assessment. Additionally, it is potentially accurate to aid decision-making and personalized treatment planning. MicroRNA (miRNA) and circulating tumor DNA (ctDNA) markers can enhance GC management in various aspects, including diagnosis (mainly earlier diagnosis and the ability to perform population-based screening), prognosis (more precise stratification of prognosis), and treatment (including more accurate prediction of treatment response and earlier detection of resistance to the treatment). Concerning the treatment-related application, miRNAs' mimics and antagonists (by using two main strategies of restoring tumor suppressor miRNAs and inhibiting oncogene miRNAs) have been shown to be effective therapeutic agents. However, these need to be further validated in clinical trials. Furthermore, novel delivery systems, such as lipid-based vectors, polymeric-based vectors, and exosome-based delivery, have been developed to enhance the performance of these agents. Moreover, this paper explores the current detection and measuring methods for these markers. These approaches are categorized into direct methods (e.g., Chem-NAT, HTG EdgeSeq, and Multiplex Circulating Fireplex) and indirect methods (e.g., Reverse transcription-quantitative polymerase chain reaction (RT-qPCR), qPCR, microarray, and NGS) for miRNA detection. For ctDNA measurement, main core technologies like NGS, digital PCR, real-time PCR, and mass spectrometry are suggested.
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Affiliation(s)
- Farhad Shaker
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Sepideh Razi
- Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran; Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nima Rezaei
- Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran; Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran; Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Stockholm, Sweden.
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2
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Malbec R, Cacheux J, Cordelier P, Leichlé T, Joseph P, Bancaud A. Microfluidics for minute DNA sample analysis: open challenges for genetic testing of cell-free circulating DNA in blood plasma. MICRO AND NANO ENGINEERING 2018. [DOI: 10.1016/j.mne.2018.10.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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3
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Ma YD, Chang WH, Luo K, Wang CH, Liu SY, Yen WH, Lee GB. Digital quantification of DNA via isothermal amplification on a self-driven microfluidic chip featuring hydrophilic film-coated polydimethylsiloxane. Biosens Bioelectron 2018; 99:547-554. [DOI: 10.1016/j.bios.2017.08.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 08/01/2017] [Accepted: 08/11/2017] [Indexed: 10/19/2022]
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4
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Lian DS, Zeng HS. Capillary Electrophoresis Based on Nucleic Acid Detection as Used in Food Analysis. Compr Rev Food Sci Food Saf 2017; 16:1281-1295. [DOI: 10.1111/1541-4337.12297] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 07/14/2017] [Accepted: 07/19/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Dong-Sheng Lian
- Guangzhou Women and Children's Medical Center of Guangzhou Medical University; NO. 9 at Jinsui Rd., Tianhe District Guangzhou Guangdong China
| | - Hua-Song Zeng
- Guangzhou Women and Children's Medical Center of Guangzhou Medical University; NO. 9 at Jinsui Rd., Tianhe District Guangzhou Guangdong China
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5
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Lian DS, Zhao SJ. Capillary electrophoresis based on nucleic acid detection for diagnosing human infectious disease. Clin Chem Lab Med 2017; 54:707-38. [PMID: 26352354 DOI: 10.1515/cclm-2015-0096] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 06/17/2015] [Indexed: 01/22/2023]
Abstract
Rapid transmission, high morbidity, and mortality are the features of human infectious diseases caused by microorganisms, such as bacteria, fungi, and viruses. These diseases may lead within a short period of time to great personal and property losses, especially in regions where sanitation is poor. Thus, rapid diagnoses are vital for the prevention and therapeutic intervention of human infectious diseases. Several conventional methods are often used to diagnose infectious diseases, e.g. methods based on cultures or morphology, or biochemical tests based on metabonomics. Although traditional methods are considered gold standards and are used most frequently, they are laborious, time consuming, and tedious and cannot meet the demand for rapid diagnoses. Disease diagnosis using capillary electrophoresis methods has the advantages of high efficiency, high throughput, and high speed, and coupled with the different nucleic acid detection strategies overcomes the drawbacks of traditional identification methods, precluding many types of false positive and negative results. Therefore, this review focuses on the application of capillary electrophoresis based on nucleic detection to the diagnosis of human infectious diseases, and offers an introduction to the limitations, advantages, and future developments of this approach.
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Abstract
Microfluidics has been undergoing fast development in the past two decades due to its promising applications in biotechnology, medicine, and chemistry. Towards these applications, enhancing concentration sensitivity and detection resolution are indispensable to meet the detection limits because of the dilute sample concentrations, ultra-small sample volumes and short detection lengths in microfluidic devices. A variety of microfluidic techniques for concentrating analytes have been developed. This article presents an overview of analyte concentration techniques in microfluidics. We focus on discussing the physical mechanism of each concentration technique with its representative advancements and applications. Finally, the article is concluded by highlighting and discussing advantages and disadvantages of the reviewed techniques.
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Affiliation(s)
- Cunlu Zhao
- Key Laboratory of Thermo-Fluid Science and Engineering of MOE, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
- Correspondence: (C.Z.); (C.Y.); Tel.: +86-29-8266-3222 (C.Z.); +65-6790-4883 (C.Y.)
| | - Zhengwei Ge
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;
| | - Chun Yang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore;
- Correspondence: (C.Z.); (C.Y.); Tel.: +86-29-8266-3222 (C.Z.); +65-6790-4883 (C.Y.)
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7
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Cong Y, Katipamula S, Geng T, Prost SA, Tang K, Kelly RT. Electrokinetic sample preconcentration and hydrodynamic sample injection for microchip electrophoresis using a pneumatic microvalve. Electrophoresis 2015; 37:455-62. [PMID: 26255610 DOI: 10.1002/elps.201500286] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 07/23/2015] [Accepted: 07/24/2015] [Indexed: 12/11/2022]
Abstract
A microfluidic platform was developed to perform online electrokinetic sample preconcentration and rapid hydrodynamic sample injection for zone electrophoresis using a single microvalve. The polydimethylsiloxane microchip comprises a separation channel, a side channel for sample introduction, and a control channel which is used as a pneumatic microvalve aligned at the intersection of the two flow channels. The closed microvalve, created by multilayer soft lithography, serves as a nanochannel preconcentrator under an applied electric potential, enabling current to pass through while preventing bulk flow. Once analytes are concentrated, the valve is briefly opened and the stacked sample is pressure injected into the separation channel for electrophoretic separation. Fluorescently labeled peptides were enriched by a factor of ∼450 in 230 s. This method enables both rapid analyte concentration and controlled injection volume for high sensitivity, high-resolution CE.
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Affiliation(s)
- Yongzheng Cong
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Shanta Katipamula
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Tao Geng
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Spencer A Prost
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Keqi Tang
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA, USA
| | - Ryan T Kelly
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA, USA
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8
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Rahmanian OD, DeVoe DL. Single-use thermoplastic microfluidic burst valves enabling on-chip reagent storage. MICROFLUIDICS AND NANOFLUIDICS 2015; 18:1045-1053. [PMID: 25972774 PMCID: PMC4426265 DOI: 10.1007/s10404-014-1494-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A simple and reliable method for fabricating single-use normally closed burst valves in thermoplastic microfluidic devices is presented, using a process flow that is readily integrated into established workflows for the fabrication of thermoplastic microfluidics. An experimental study of valve performance reveals the relationships between valve geometry and burst pressure. The technology is demonstrated in a device employing multiple valves engineered to actuate at different inlet pressures that can be generated using integrated screw pumps. On-chip storage and reconstitution of fluorescein salt sealed within defined reagent chambers are demonstrated. By taking advantage of the low gas and water permeability of cyclic olefin copolymer, the robust burst valves allow on-chip hermetic storage of reagents, making the technology well suited for the development of integrated and disposable assays for use at the point of care.
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Affiliation(s)
- Omid D. Rahmanian
- Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
| | - Don L. DeVoe
- Department of Bioengineering, University of Maryland, College Park, MD 20742, USA. Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA
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Moriguchi H, Kawai T, Tanaka Y. Simple bilayer on-chip valves using reversible sealability of PDMS. RSC Adv 2015. [DOI: 10.1039/c4ra10300a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Simple bilayer on-chip valves exploiting the reversible sealability of PDMS were realized by patterning the non-covalent area between two parallel microchannels.
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Affiliation(s)
| | - Takayuki Kawai
- Quantitative Biology Center (QBiC)
- RIKEN
- Kobe
- Japan
- Japan Science and Technology Agency
| | - Yo Tanaka
- Quantitative Biology Center (QBiC)
- RIKEN
- Kobe
- Japan
- Graduate School of Frontier Biosciences
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10
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Ge Z, Wang W, Yang C. Rapid concentration of deoxyribonucleic acid via Joule heating induced temperature gradient focusing in poly-dimethylsiloxane microfluidic channel. Anal Chim Acta 2014; 858:91-7. [PMID: 25597807 DOI: 10.1016/j.aca.2014.12.016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 12/09/2014] [Indexed: 10/24/2022]
Abstract
This paper reports rapid microfluidic electrokinetic concentration of deoxyribonucleic acid (DNA) with the Joule heating induced temperature gradient focusing (TGF) by using our proposed combined AC and DC electric field technique. A peak of 480-fold concentration enhancement of DNA sample is achieved within 40s in a simple poly-dimethylsiloxane (PDMS) microfluidic channel of a sudden expansion in cross-section. Compared to a sole DC field, the introduction of an AC field can reduce DC field induced back-pressure and produce sufficient Joule heating effects, resulting in higher concentration enhancement. Within such microfluidic channel structure, negative charged DNA analytes can be concentrated at a location where the DNA electrophoretic motion is balanced with the bulk flow driven by DC electroosmosis under an appropriate temperature gradient field. A numerical model accounting for a combined AC and DC field and back-pressure driven flow effects is developed to describe the complex Joule heating induced TGF processes. The experimental observation of DNA concentration phenomena can be explained by the numerical model.
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Affiliation(s)
- Zhengwei Ge
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore
| | - Wei Wang
- Singapore Institute of Manufacturing Technology, 638075, Singapore
| | - Chun Yang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore.
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11
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Quist J, Vulto P, Hankemeier T. Isotachophoretic Phenomena in Electric Field Gradient Focusing: Perspectives for Sample Preparation and Bioassays. Anal Chem 2014; 86:4078-87. [DOI: 10.1021/ac403764e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jos Quist
- Division of Analytical Biosciences, Leiden
Academic Centre for Drug Research (LACDR), Gorlaeus Laboratories, Einsteinweg 55, Leiden, 2333CC, The Netherlands
- Netherlands Metabolomics
Centre (NMC), Leiden University, Einsteinweg 55, Leiden, South Holland 2333CC, The Netherlands
| | - Paul Vulto
- Division of Analytical Biosciences, Leiden
Academic Centre for Drug Research (LACDR), Gorlaeus Laboratories, Einsteinweg 55, Leiden, 2333CC, The Netherlands
- Netherlands Metabolomics
Centre (NMC), Leiden University, Einsteinweg 55, Leiden, South Holland 2333CC, The Netherlands
| | - Thomas Hankemeier
- Division of Analytical Biosciences, Leiden
Academic Centre for Drug Research (LACDR), Gorlaeus Laboratories, Einsteinweg 55, Leiden, 2333CC, The Netherlands
- Netherlands Metabolomics
Centre (NMC), Leiden University, Einsteinweg 55, Leiden, South Holland 2333CC, The Netherlands
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Quist J, Trietsch SJ, Vulto P, Hankemeier T. Elastomeric microvalves as tunable nanochannels for concentration polarization. LAB ON A CHIP 2013; 13:4810-4815. [PMID: 24158567 DOI: 10.1039/c3lc50658d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Elastomeric microvalves in poly(dimethylsiloxane) (PDMS) devices are today's paradigm for massively parallel microfluidic operations. Here, we report that such valves can act as nanochannels upon closure. When tuning nanospace heights between ~55 nm and ~7 nm, the nanofluidic phenomenon of concentration polarization could be induced. A wide range of concentration polarization regimes (anodic and cathodic analyte focusing and stacking) was achieved simply by valve pressure actuation. Electro-osmotic flow generated a counterpressure which also could be used to actuate between concentration polarization regimes. 1000-fold preconcentration of fluorescein was achieved in just 100 s in the anodic focusing regime. After valve opening, a concentrated sample plug could be transported through the valve, though at the cost of some defocusing. Reversible nanochannels open new avenues for integrating electrokinetic operations and assays in large scale integrated microfluidics.
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Affiliation(s)
- Jos Quist
- Netherlands Metabolomics Centre (NMC), Leiden Academic Centre for Drug Research (LACDR), Einsteinweg 55, 2333CC, Leiden, The Netherlands.
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13
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Formation of Tunable, Emulsion Micro-Droplets Utilizing Flow-Focusing Channels and a Normally-Closed Micro-Valve. MICROMACHINES 2013. [DOI: 10.3390/mi4030306] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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14
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Yeo WH, Kopacz AM, Kim JH, Chen X, Wu J, Gao D, Lee KH, Liu WK, Chung JH. Dielectrophoretic concentration of low-abundance nanoparticles using a nanostructured tip. NANOTECHNOLOGY 2012; 23:485707. [PMID: 23137928 DOI: 10.1088/0957-4484/23/48/485707] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Electric field-induced concentration has the potential for application in highly sensitive detection of nanoparticles (NPs) for disease diagnosis and drug discovery. Conventional two-dimensional planar electrodes, however, have shown limited sensitivity in NP concentration. In this paper, the dielectrophoretic (DEP) concentration of low-abundance NPs is studied using a nanostructured tip where a high electric field of 3 × 10(7) V m(-1) is generated. In experimental studies, individual 2, 10, and 100 nm Au NPs are concentrated to a nanotip using DEP concentration and are detected by scanning transmission and scanning electron microscopes. The DEP force on Au NPs near the end of a nanotip is computed according to the distance, and then compared with Brownian motion-induced force. The computational study shows qualitative agreement with the experimental results. When the experimental conditions for DEP concentration are optimized for 8 nm-long oligonucleotides, the sensitivity of a nanotip is 10 aM (10 attomolar; nine copies in a 1.5 μl sample volume). This DEP concentrator using a nanotip can be used for molecular detection without amplification.
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Affiliation(s)
- Woon-Hong Yeo
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195, USA
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15
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Wu ZY, Fang F, He YQ, Li TT, Li JJ, Tian L. Flexible and Efficient Eletrokinetic Stacking of DNA and Proteins at an HF Etched Porous Junction on a Fused Silica Capillary. Anal Chem 2012; 84:7085-91. [DOI: 10.1021/ac301364j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhi-Yong Wu
- Research
Center for Analytical Sciences, ‡Chemistry Department, Northeastern University, Shenyang 110819, PR China
| | - Fang Fang
- Research
Center for Analytical Sciences, ‡Chemistry Department, Northeastern University, Shenyang 110819, PR China
| | - Yan-Qin He
- Research
Center for Analytical Sciences, ‡Chemistry Department, Northeastern University, Shenyang 110819, PR China
| | - Ting-Ting Li
- Research
Center for Analytical Sciences, ‡Chemistry Department, Northeastern University, Shenyang 110819, PR China
| | - Jing-Jing Li
- Research
Center for Analytical Sciences, ‡Chemistry Department, Northeastern University, Shenyang 110819, PR China
| | - Li Tian
- Research
Center for Analytical Sciences, ‡Chemistry Department, Northeastern University, Shenyang 110819, PR China
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16
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Kenyon SM, Weiss NG, Hayes MA. Using electrophoretic exclusion to manipulate small molecules and particles on a microdevice. Electrophoresis 2012; 33:1227-35. [PMID: 22589099 DOI: 10.1002/elps.201100622] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Electrophoretic exclusion, a novel separations technique that differentiates species in bulk solution using the opposing forces of electrophoretic velocity and hydrodynamic flow, has been adapted to a microscale device. Proof-of-principle experiments indicate that the device was able to exclude small particles (1 μm polystyrene microspheres) and fluorescent dye molecules (rhodamine 123) from the entrance of a channel. Additionally, differentiation of the rhodamine 123 and polystyrene spheres was demonstrated. The current studies focus on the direct observation of the electrophoretic exclusion behavior on a microchip.
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Affiliation(s)
- Stacy M Kenyon
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287, USA
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17
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Meagher RJ, Thaitrong N. Microchip electrophoresis of DNA following preconcentration at photopatterned gel membranes. Electrophoresis 2012; 33:1236-46. [DOI: 10.1002/elps.201100675] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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18
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Sueyoshi K. Recent Progress of On-line Combination of Preconcentration Device with Microchip Electrophoresis. CHROMATOGRAPHY 2012. [DOI: 10.15583/jpchrom.2012.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Kenji Sueyoshi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University
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19
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Surface modification for PDMS-based microfluidic devices. Electrophoresis 2011; 33:89-104. [DOI: 10.1002/elps.201100482] [Citation(s) in RCA: 233] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 10/04/2011] [Accepted: 10/04/2011] [Indexed: 11/07/2022]
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20
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Chang CM, Chiu LF, Wang PW, Shieh DB, Lee GB. A microfluidic system for fast detection of mitochondrial DNA deletion. LAB ON A CHIP 2011; 11:2693-2700. [PMID: 21727979 DOI: 10.1039/c1lc20317g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This study reports an integrated microfluidic system capable of automatic extraction and analysis of mitochondrial DNA (mtDNA). Mitochondria are the energy production and metabolism centres of human and animal cells, which supply most of the energy for maintaining physiological functions and play an important role in the process of cell death. Because it lacks an effective repair system, mtDNA suffers much higher oxidative damage and usually harbours more mutations than nuclear DNA. Alterations of mtDNA have been reported to be strongly associated with mitochondrial dysfunction, mitochondria-related diseases, aging, and many important human diseases such as diabetes and cancers. Thus, an effective tool for automatic detection of mtDNA deletion is in great need. This study, therefore, proposed a microfluidic system integrating three enabling modules to perform the entire protocol for the detection of mtDNA deletion. Crucial processes which included mtDNA extraction, nucleic acid amplification, separation and detection of the target genes were automatically performed. When compared with traditional assays, the developed microfluidic system consumed fewer samples and reagents, achieved a higher mtDNA extraction rate, and could automate all the processes within a shorter period of time (150 minutes). It may provide a powerful tool for the analysis of mitochondria mutations in the near future.
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Affiliation(s)
- Chen-Min Chang
- Department of Engineering Science, National Cheng Kung University, Tainan, 701, Taiwan
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Kenyon SM, Meighan MM, Hayes MA. Recent developments in electrophoretic separations on microfluidic devices. Electrophoresis 2011; 32:482-93. [DOI: 10.1002/elps.201000469] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2010] [Revised: 11/24/2010] [Accepted: 12/09/2010] [Indexed: 11/09/2022]
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22
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Kim H, Kim J, Kim EG, Heinz AJ, Kwon S, Chun H. Optofluidic in situ maskless lithography of charge selective nanoporous hydrogel for DNA preconcentration. BIOMICROFLUIDICS 2010; 4:43014. [PMID: 21267091 PMCID: PMC3026036 DOI: 10.1063/1.3516037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Accepted: 10/20/2010] [Indexed: 05/12/2023]
Abstract
An optofluidic maskless photopolymerization process was developed for in situ negatively charged nanoporous hydrogel [poly-AMPS (2-acrylamido-2-methyl-1-propanesulfonic acid)] fabrication. The optofluidic maskless lithography system, which combines a high power UV source and digital mirror device, enables fast polymerization of arbitrary shaped hydrogels in a microfluidic device. The poly-AMPS hydrogel structures were positioned near the intersections of two microchannels, and were used as a cation-selective filter for biological sample preconcentration. Preconcentration dynamics as well as the fabricated polymer shape were analyzed in three-dimensions using fluorescein sample and a confocal microscope. Finally, single-stranded DNA preconcentration was demonstrated for polymerase chain reaction-free signal enhancement.
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Lin CC, Tseng CC, Huang CJ, Wang JH, Lee GB. An integrated microfluidic chip for non-immunological determination of urinary albumin. Biomed Microdevices 2010; 12:887-96. [DOI: 10.1007/s10544-010-9443-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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