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Maurye P, Basu A, Kumari K, Dey P, Sen S, Devi MS. A unified quartet DNA gel electrophoresis instrument with integrated agarose gel casting, electrophoresis, staining, and imaging facilities. SEPARATION SCIENCE PLUS 2021. [DOI: 10.1002/sscp.202100012] [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)
- Praveen Maurye
- Aquatic Environmental Biotechnology and Nanotechnology Division ICAR‐Central Inland Fisheries Research Institute (Indian Council of Agricultural Research) Barrackpore Kolkata West Bengal India
| | - Arpita Basu
- Biotechnology Kendriya Vidyalaya Ministry of Human Resource Development Bhubaneswar Orissa India
| | - Kavita Kumari
- Aquatic Environmental Biotechnology and Nanotechnology Division ICAR‐Central Inland Fisheries Research Institute (Indian Council of Agricultural Research) Barrackpore Kolkata West Bengal India
| | | | - Sohini Sen
- School of Bioscience and Engineering Jadavpur Universty Kolkata West Bengal India
| | - Manoharmayum Shaya Devi
- Aquatic Environmental Biotechnology and Nanotechnology Division ICAR‐Central Inland Fisheries Research Institute (Indian Council of Agricultural Research) Barrackpore Kolkata West Bengal India
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Gutzweiler L, Gleichmann T, Tanguy L, Koltay P, Zengerle R, Riegger L. Open microfluidic gel electrophoresis: Rapid and low cost separation and analysis of DNA at the nanoliter scale. Electrophoresis 2017; 38:1764-1770. [DOI: 10.1002/elps.201700001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 04/06/2017] [Accepted: 04/06/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Ludwig Gutzweiler
- Laboratory for MEMS Applications; IMTEK - Department of Microsystems Engineering; University of Freiburg; Freiburg Germany
- Hahn-Schickard; Freiburg Germany
| | - Tobias Gleichmann
- Laboratory for MEMS Applications; IMTEK - Department of Microsystems Engineering; University of Freiburg; Freiburg Germany
| | - Laurent Tanguy
- Hahn-Schickard; Freiburg Germany
- PMB-Alcen; Peynier France
| | - Peter Koltay
- Laboratory for MEMS Applications; IMTEK - Department of Microsystems Engineering; University of Freiburg; Freiburg Germany
- BioFluidix GmbH; Freiburg Germany
| | - Roland Zengerle
- Laboratory for MEMS Applications; IMTEK - Department of Microsystems Engineering; University of Freiburg; Freiburg Germany
- Hahn-Schickard; Freiburg Germany
- FIT - Freiburg Centre for Interactive Materials and Bioinspired Technologies; University of Freiburg; Freiburg Germany
| | - Lutz Riegger
- Laboratory for MEMS Applications; IMTEK - Department of Microsystems Engineering; University of Freiburg; Freiburg Germany
- BioFluidix GmbH; Freiburg Germany
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YAMASHITA T, YASUKAWA K, KEMMEI T, HORII Y, NAKAYAMA E, MURAMOTO T, TAKADA H. Low-cost Methods for Making 3D Fluidic Polymer and Glass Chips Using Metal Templates. ANAL SCI 2015; 31:1261-6. [DOI: 10.2116/analsci.31.1261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhang P, Park G, Kang SH. Fast High-throughput Screening of the H1N1 Virus by Parallel Detection with Multi-channel Microchip Electrophoresis. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.4.1082] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Zhang P, Nan H, Lee MJ, Kang SH. Ultra-fast separation of infectious disease-related small DNA molecules by single- and multi-channel microchip electrophoresis. Talanta 2013; 106:388-93. [DOI: 10.1016/j.talanta.2013.01.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2012] [Revised: 01/09/2013] [Accepted: 01/10/2013] [Indexed: 10/27/2022]
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Mizukami K, Chang HS, Yabuki A, Kawamichi T, Kawahara N, Hayashi D, Hossain MA, Rahman MM, Uddin MM, Yamato O. Novel rapid genotyping assays for neuronal ceroid lipofuscinosis in Border Collie dogs and high frequency of the mutant allele in Japan. J Vet Diagn Invest 2012; 23:1131-9. [PMID: 22362793 DOI: 10.1177/1040638711425590] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Neuronal ceroid lipofuscinosis (NCL) constitutes a group of recessively inherited lysosomal storage diseases that primarily affect neuronal cells. Such diseases share certain clinical and pathologic features in human beings and animals. Neuronal ceroid lipofuscinosis in Border Collie dogs was first detected in Australia in the 1980s, and the pathogenic mutation was shown to be a nonsense mutation (c.619C>T) in exon 4 in canine CLN5 gene. In the present study, novel rapid genotyping assays including polymerase chain reaction (PCR)-restriction fragment length polymorphism, PCR primer-induced restriction analysis, mutagenically separated PCR, and real-time PCR with TaqMan minor groove binder probes, were developed. The utility of microchip electrophoresis was also evaluated. Furthermore, a genotyping survey was carried out in a population of Border Collies in Japan using these assays to determine the current allele frequency in Japan, providing information to control and prevent this disease in the next stage. All assays developed in the current study are available to discriminate these genotypes, and microchip electrophoresis showed a timesaving advantage over agarose gel electrophoresis. Of all assays, real-time PCR was the most suitable for large-scale examination because of its high throughput. The genotyping survey demonstrated that the carrier frequency was 8.1%. This finding suggested that the mutant allele frequency of NCL in Border Collies is high enough in Japan that measures to control and prevent the disease would be warranted. The genotyping assays developed in the present study could contribute to the prevention of NCL in Border Collies.
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Affiliation(s)
- Keijiro Mizukami
- Laboratory of Clinical Pathology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Kagoshima University, 1-21-24 Kohrimoto, Kagoshima 890-0065. Japan
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Yamamura S, Yatsushiro S, Yamaguchi Y, Abe K, Shinohara Y, Kataoka M. Detection of miRNA in cell cultures by using microchip electrophoresis with a fluorescence-labeled riboprobe. SENSORS 2012; 12:7576-86. [PMID: 22969361 PMCID: PMC3435990 DOI: 10.3390/s120607576] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2012] [Revised: 05/28/2012] [Accepted: 05/31/2012] [Indexed: 11/18/2022]
Abstract
The analysis of a microRNA (miRNA), miR-222 isolated from the PC12 cell line, was performed by use of the ribonuclease (RNase) protection assay, cyanine 5 (Cy5)-labeled miR-222 riboprobe, and a Hitachi SV1210 microchip electrophoresis system, which can be used to evaluate the integrity of total RNA. The fluorescence intensity corresponding to the protected RNA fragment increased in a dose-dependent manner with respect to the complementary-strand RNA. More highly sensitive detection of miRNA by microchip electrophoresis than by conventional method using fluorescence-labeled riboprobe could be obtained in 180 s. An obvious increase in miR-222 expression induced by nerve growth factor in PC12 cells could be observed. These results clearly indicate the potential of microchip electrophoresis for the analysis of miRNA using RNase protection assay with a fluorescence-labeled riboprobe.
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Affiliation(s)
- Shohei Yamamura
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan; E-Mails: (S.Y.); (S.Y.); (Y.Y.); (K.A.)
| | - Shouki Yatsushiro
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan; E-Mails: (S.Y.); (S.Y.); (Y.Y.); (K.A.)
| | - Yuka Yamaguchi
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan; E-Mails: (S.Y.); (S.Y.); (Y.Y.); (K.A.)
| | - Kaori Abe
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan; E-Mails: (S.Y.); (S.Y.); (Y.Y.); (K.A.)
| | - Yasuo Shinohara
- Division of Protein Expression, Institute for Genome Research, University of Tokushima, Kuramoto 3-18-15, Tokushima 770-8503, Japan; E-Mail:
| | - Masatoshi Kataoka
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan; E-Mails: (S.Y.); (S.Y.); (Y.Y.); (K.A.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +81-87-869-3576; Fax: +81-87-869-3551
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Mu X, Qi L, Qiao J, Zhang H, Ma H. Study on alanine aminotransferase kinetics by microchip electrophoresis. Anal Biochem 2012; 421:499-505. [DOI: 10.1016/j.ab.2011.11.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Revised: 11/23/2011] [Accepted: 11/28/2011] [Indexed: 12/27/2022]
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Mizukami K, Chang HS, Yabuki A, Kawamichi T, Hossain MA, Rahman MM, Uddin MM, Yamato O. Rapid genotyping assays for the 4–base pair deletion of canine MDR1/ABCB1 gene and low frequency of the mutant allele in Border Collie dogs. J Vet Diagn Invest 2011; 24:127-34. [DOI: 10.1177/1040638711425591] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
P-glycoprotein, encoded by the MDR1 or ABCB1 gene, is an integral component of the blood–brain barrier as an efflux pump for xenobiotics crucial in limiting drug uptake into the central nervous system. Dogs homozygous for a 4–base pair deletion of the canine MDR1 gene show altered expression or function of P-glycoprotein, resulting in neurotoxicosis after administration of the substrate drugs. In the present study, the usefulness of microchip electrophoresis for genotyping assays detecting this deletion mutation was evaluated. Mutagenically separated polymerase chain reaction (MS-PCR) and real-time PCR assays were newly developed and evaluated. Furthermore, a genotyping survey was carried out in a population of Border Collies dogs in Japan to determine the allele frequency in this breed. Microchip electrophoresis showed advantages in detection sensitivity and time saving over other modes of electrophoresis. The MS-PCR assay clearly discriminated all genotypes. Real-time PCR assay was most suitable for a large-scale survey due to its high throughput and rapidity. The genotyping survey demonstrated that the carrier and mutant allele frequencies were 0.49% and 0.25%, respectively, suggesting that the mutant allele frequency in Border Collies is markedly low compared to that in the susceptible dog breeds such as rough and smooth Collies.
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Affiliation(s)
- Keijiro Mizukami
- Laboratory of Clinical Pathology, Department of Veterinary Medicine, Kagoshima University, Kagoshima, Japan (Mizukami, Chang, Yabuki, Hossain, Rahman, Uddin, Yamato)
- Japan Border Collie Health Network, Kobe, Japan (Kawamichi)
| | - Hye-Sook Chang
- Laboratory of Clinical Pathology, Department of Veterinary Medicine, Kagoshima University, Kagoshima, Japan (Mizukami, Chang, Yabuki, Hossain, Rahman, Uddin, Yamato)
- Japan Border Collie Health Network, Kobe, Japan (Kawamichi)
| | - Akira Yabuki
- Laboratory of Clinical Pathology, Department of Veterinary Medicine, Kagoshima University, Kagoshima, Japan (Mizukami, Chang, Yabuki, Hossain, Rahman, Uddin, Yamato)
- Japan Border Collie Health Network, Kobe, Japan (Kawamichi)
| | - Takuji Kawamichi
- Laboratory of Clinical Pathology, Department of Veterinary Medicine, Kagoshima University, Kagoshima, Japan (Mizukami, Chang, Yabuki, Hossain, Rahman, Uddin, Yamato)
- Japan Border Collie Health Network, Kobe, Japan (Kawamichi)
| | - Mohammad A. Hossain
- Laboratory of Clinical Pathology, Department of Veterinary Medicine, Kagoshima University, Kagoshima, Japan (Mizukami, Chang, Yabuki, Hossain, Rahman, Uddin, Yamato)
- Japan Border Collie Health Network, Kobe, Japan (Kawamichi)
| | - Mohammad M. Rahman
- Laboratory of Clinical Pathology, Department of Veterinary Medicine, Kagoshima University, Kagoshima, Japan (Mizukami, Chang, Yabuki, Hossain, Rahman, Uddin, Yamato)
- Japan Border Collie Health Network, Kobe, Japan (Kawamichi)
| | - Mohammad M. Uddin
- Laboratory of Clinical Pathology, Department of Veterinary Medicine, Kagoshima University, Kagoshima, Japan (Mizukami, Chang, Yabuki, Hossain, Rahman, Uddin, Yamato)
- Japan Border Collie Health Network, Kobe, Japan (Kawamichi)
| | - Osamu Yamato
- Laboratory of Clinical Pathology, Department of Veterinary Medicine, Kagoshima University, Kagoshima, Japan (Mizukami, Chang, Yabuki, Hossain, Rahman, Uddin, Yamato)
- Japan Border Collie Health Network, Kobe, Japan (Kawamichi)
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Yamaguchi Y, Yatsushiro S, Yamamura S, Abe H, Abe K, Watanabe M, Kajimoto K, Shinohara Y, Baba Y, Kataoka M. Ribonuclease protection assay on microchip electrophoresis. Analyst 2011; 136:2247-51. [PMID: 21509398 DOI: 10.1039/c0an01044h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe the potential of microchip electrophoresis with a Hitachi SV1210, which can be used to evaluate the integrity of total RNA, for the analysis of mRNA expression. The ribonuclease (RNase) protection assay was performed by using microchip electrophoresis with cyanine 5 (Cy5) labeled 248-base antisense RNA probe (riboprobe) encoding adipose-type fatty acid binding protein (A-FABP) as the riboprobe. The fluorescence intensity corresponding to the protected RNA fragment increased in a dose-dependent manner with respect to the complementary strand RNA. Results were obtained in 120 s, and the same amount of Cy5-labeled antisense riboprobe as used in the conventional method can be used. Furthermore, 8 times more sensitive detection of mRNA by microchip electrophoresis could be obtained. An obvious increase in the mRNA expression of A-FABP, which is known as a differentiation marker of adipocytes, occurred during the adipocyte differentiation of 3T3-L1 cells. These results clearly indicate the potential of microchip electrophoresis for the analysis of mRNA expression in cells.
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Affiliation(s)
- Yuka Yamaguchi
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, 761-0395, Japan
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Rahman MM, Shoubudani T, Mizukami K, Chang HS, Hossain MA, Yabuki A, Mitani S, Higo T, Arai T, Yamato O. Rapid and Simple Polymerase Chain Reaction—Based Diagnostic Assays for GM2 Gangliosidosis Variant 0 (Sandhoff-Like Disease) in Japanese Domestic Cats. J Vet Diagn Invest 2011; 23:338-42. [DOI: 10.1177/104063871102300224] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Polymerase chain reaction (PCR)-based assays combined with microchip electrophoresis were developed and evaluated for diagnosis and genotyping of GM2 gangliosidosis variant 0 (Sandhoff-like disease) in Japanese domestic cats. A preliminary genotyping survey was carried out in the population of Japanese domestic cats (1,015 cats in total) in southern Japan. Three kinds of assays including PCR primer-induced restriction analysis (PIRA) and mutagenically separated (MS)-PCR were carried out using blood-stained Flinders Technology Associates filter papers (FTA cards) as templates. The PCR products were analyzed by both agarose gel and microchip electrophoreses. All assays were sufficient to determine the genotypes of this disease, but MS-PCR offered the most rapid and simplest test, as it does not need the restriction enzyme step required in PCR-PIRA. The use of microchip electrophoresis in combination with FTA cards for sampling could shorten the time required for genotyping and simplify the procedure as well. The genotyping survey in the current study did not find any cats that possessed the mutant allele, suggesting that the prevalence of this allele is low (<0.1%) in southern Japan.
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Affiliation(s)
- Mohammad M. Rahman
- Laboratory of Clinical Pathology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan
| | - Tomoaki Shoubudani
- Laboratory of Clinical Pathology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan
| | - Keijiro Mizukami
- Laboratory of Clinical Pathology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan
| | - Hye-Sook Chang
- Laboratory of Clinical Pathology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan
| | - Mohammad A. Hossain
- Laboratory of Clinical Pathology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan
| | - Akira Yabuki
- Laboratory of Clinical Pathology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan
| | - Sawane Mitani
- Laboratory of Clinical Pathology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Kagoshima University, Kagoshima, Japan
| | | | - Toshiro Arai
- Laboratory of Veterinary Biochemistry, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Tokyo, Japan
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Chang HS, Mizukami K, Yabuki A, Hossain MA, Rahman MM, Uddin MM, Arai T, Yamato O. A novel rapid genotyping technique for Collie eye anomaly: SYBR Green-based real-time polymerase chain reaction method applicable to blood and saliva specimens on Flinders Technology Associates filter paper. J Vet Diagn Invest 2010; 22:708-15. [PMID: 20807925 DOI: 10.1177/104063871002200506] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Collie eye anomaly (CEA) is a canine inherited ocular disease that shows a wide variety of manifestations and severity of clinical lesions. Recently, a CEA-associated mutation was reported, and a DNA test that uses conventional polymerase chain reaction (PCR) has now become available. The objective of the current study was to develop a novel rapid genotyping technique by using SYBR Green-based real-time PCR for future large-scale surveys as a key part in the strategy to eradicate CEA by selective breeding. First, a SYBR Green-based real-time PCR assay for genotyping of CEA was developed and evaluated by using purified DNA samples from normal, carrier, and affected Border Collies in which genotypes had previously been determined by conventional PCR. This real-time PCR assay demonstrated appropriate amplifications in all genotypes, and the results were consistent with those of conventional PCR. Second, the availability of Flinders Technology Associates filter paper (FTA card) as DNA templates for the real-time PCR assay was evaluated by using blood and saliva specimens to determine suitability for CEA screening. DNA-containing solution prepared from a disc of blood- or saliva-spotted FTA cards was available directly as templates for the real-time PCR assay when the volume of solution was 2.5% of the PCR mixture. In conclusion, SYBR Green-based real-time PCR combined with FTA cards is a rapid genotyping technique for CEA that can markedly shorten the overall time required for genotyping as well as simplify the sample preparation. Therefore, this newly developed technique suits large-scale screening in breeding populations of Collie-related breeds.
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Affiliation(s)
- Hye-Sook Chang
- Laboratory of Clinical Pathology, Department of Veterinary Clinical Sciences, Faculty of Agriculture, Kagoshima University, Kohrimoto, Kagoshima, Japan
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An integrated microfluidic device for DNA purification and PCR amplification of STR fragments. Forensic Sci Int Genet 2010; 4:178-86. [DOI: 10.1016/j.fsigen.2009.02.010] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2008] [Revised: 01/15/2009] [Accepted: 02/01/2009] [Indexed: 01/20/2023]
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Chan YC, Zohar Y, Lee YK. Effects of embedded sub-micron pillar arrays in microfluidic channels on large DNA electrophoresis. Electrophoresis 2009; 30:3242-9. [PMID: 19722207 DOI: 10.1002/elps.200900127] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A study of the influences of embedding artificial structures in a microfluidic device for CE with a free buffer solution is presented. Compared with conventional slab-gel electrophoresis, three major additional effects on the overall system performance are identified when sub-micron pillar arrays are integrated into a standard CE microsystem. Since DNA molecules have to migrate in-between and interact with the pillars, pillar geometry is first demonstrated to have a direct impact on the DNA motion pattern. Electric field re-distribution is another inevitable outcome when features of sub-micron dimensions are placed inside a microchannel. This effect is verified by a numerical simulation tool. Furthermore, the integration of the closely packed sub-micron structures dramatically increases the surface to volume ratios in the microfluidic device and therefore generates a large EOF. The consequence of these additional influences implies a complexity in the measured DNA velocity and indicates that careful considerations have to be taken when these devices are used for DNA electrokinetics study or electrophoresis theory re-examination.
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Affiliation(s)
- Yick Chuen Chan
- Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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Akamine R, Yatsushiro S, Yamamura S, Kido JI, Shinohara Y, Baba Y, Kataoka M. Direct endonuclease digestion and multi-analysis of restriction fragment length polymorphisms by microchip electrophoresis. J Pharm Biomed Anal 2009; 50:947-53. [PMID: 19616912 DOI: 10.1016/j.jpba.2009.06.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2009] [Revised: 06/15/2009] [Accepted: 06/17/2009] [Indexed: 11/15/2022]
Abstract
A high-performance multi-analysis system for genotypic mutation by means of restriction fragment length polymorphisms (RFLP) involving endonuclease treatment of PCR-amplified DNA on a microchip and subsequent analysis by microchip electrophoresis for DNA sizing was developed. A Hitachi SV1210 system, with which 12 samples can be analyzed on a plastic chip with good accuracy as to DNA sizing between 25 and 300 bp, was employed for RFLP analysis. We performed RFLP analysis of the ABO genotypes of blood donors for whom the ABO type was known. Six blood samples were analyzed by PCR to amplify two different regions of the genomic DNA, each of the amplified DNAs containing a different nucleotide polymorphism. To analyze the genes at polymorphic sites 261 and 526, restriction endonucleases Kpn I and Ban I were employed, respectively. When an amplified DNA was digested with each endonuclease on a microchip for 20 min, sequential analysis revealed the presence or absence of the respective restriction site. This analysis was performed within 7 min using a 1/10 volume of a DNA sample in comparison with the conventional method, and the estimated DNA size differed from the predicted size by less than 10 bp. The results indicate the potential of microchip electrophoresis for RFLP with on-chip direct endonuclease digestion and sequential analysis, offering high resolution in a short time.
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Affiliation(s)
- Rie Akamine
- Health Technology Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Hayashi-cho 2217-14, Takamatsu 761-0395, Japan
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Umemoto Y, Kataoka M, Yatsushiro S, Watanabe M, Kido JI, Kakuhata R, Yamamoto T, Shinohara Y, Baba Y. Sequential analysis of RNA synthesis by microchip electrophoresis. Anal Biochem 2009; 388:161-3. [DOI: 10.1016/j.ab.2009.01.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2008] [Revised: 01/27/2009] [Accepted: 01/27/2009] [Indexed: 12/12/2022]
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INOUE Y, NISHIWAKI M, KUDO Y, SEINO N, NAKAGAMA T, UCHIYAMA K. Preparation of Two-dimensionally Ordered Microbeads Structure Dispensed with an Ink-jet and Its Application to ELISA. ANAL SCI 2009; 25:235-9. [DOI: 10.2116/analsci.25.235] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yoriko INOUE
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Moeka NISHIWAKI
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Yuki KUDO
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Nobuko SEINO
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Tatsuro NAKAGAMA
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Katsumi UCHIYAMA
- Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University
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Lo RC, Ugaz VM. Microchip DNA electrophoresis with automated whole-gel scanning detection. LAB ON A CHIP 2008; 8:2135-45. [PMID: 19023477 DOI: 10.1039/b811033f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Gel electrophoresis continues to play an important role in miniaturized bioanalytical systems, both as a stand alone technique and as a key component of integrated lab-on-a-chip diagnostics. Most implementations of microchip electrophoresis employ finish-line detection methods whereby fluorescently labeled analytes are observed as they migrate past a fixed detection point near the end of the separation channel. But tradeoffs may exist between the simultaneous goals of maximizing resolution (normally achieved by using longer separation channels) and maximizing the size range of analytes that can be studied (where shorter separation distances reduce the time required for the slowest analytes to reach the detector). Here we show how the miniaturized format can offer new opportunities to employ alternative detection schemes that can help address these issues by introducing an automated whole-gel scanning detection system that enables the progress of microchip-based gel electrophoresis of DNA to be continuously monitored along an entire microchannel. This permits flexibility to selectively observe smaller faster moving fragments during the early stages of the separation before they have experienced significant diffusive broadening, while allowing the larger slower moving fragments to be observed later in the run when they can be better resolved but without the need for them to travel the entire length of the separation channel. Whole-gel scanning also provides a continuous and detailed picture of the electrophoresis process as it unfolds, allowing fundamental physical parameters associated with DNA migration phenomena (e.g., mobility, diffusive broadening) to be rapidly and accurately measured in a single experiment. These capabilities are challenging to implement using finish-line methods, and make it possible to envision a platform capable of enabling separation performance to be rapidly screened in a wide range of gel matrix materials and operating conditions, even allowing separation and matrix characterization steps to be performed simultaneously in a single self-calibrating experiment.
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Affiliation(s)
- Roger C Lo
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, TX 77843-3122, USA.
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Ali I, Aboul-Enein HY, Gupta VK. Microchip-Based Nano Chromatography and Nano Capillary Electrophoresis in Genomics and Proteomics. Chromatographia 2008. [DOI: 10.1365/s10337-008-0813-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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20
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Dishinger JF, Kennedy RT. Multiplexed detection and applications for separations on parallel microchips. Electrophoresis 2008; 29:3296-305. [PMID: 18702055 PMCID: PMC2597776 DOI: 10.1002/elps.200800067] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Much work has been performed since the development of the lab-on-a-chip concept that has brought microfabricated systems to the forefront of bioanalytical research. The success of using these microchips for performing complicated biological assays faster and cheaper than conventional methods has facilitated their emerging popularity among researchers. A recently exploited advantage of microfabricated technology has led to the creation of single wafers with multiple channel manifolds for high-throughput experiments. Efforts toward parallel microchip development have yielded fascinating new devices for chemical separations showing the potential for replacing conventional multiplexing techniques. This review will focus on recent work toward multiplexed separations on microdevices and complementary detection instrumentation.
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Affiliation(s)
| | - Robert T. Kennedy
- Department of Chemistry, University of Michigan, Ann Arbor, MI, USA
- Department of Pharmacology, University of Michigan, Ann Arbor, MI, USA
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21
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Maeda E, Kataoka M, Yatsushiro S, Kajimoto K, Hino M, Kaji N, Tokeshi M, Bando M, Kido JI, Ishikawa M, Shinohara Y, Baba Y. Accurate quantitation of salivary and pancreatic amylase activities in human plasma by microchip electrophoretic separation of the substrates and hydrolysates coupled with immunoinhibition. Electrophoresis 2008; 29:1902-9. [PMID: 18393344 DOI: 10.1002/elps.200700688] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A high-performance determination system for alpha-amylase isoenzyme activities in human plasma involving microchip electrophoresis with a plastic chip was developed. The combination of microchip electrophoresis for substrate and hydrolysate separation and an immunoinhibition method for the differentiation of isoenzyme activities using antihuman salivary amylase (S-AMY) mAb allowed the highly selective determination of amylase isoenzyme (S-AMY and pancreatic amylase (P-AMY)) activities even in a complex matrix such as a crude plasma sample. We used 8-aminopyrene-1,3,6-trisulfonic acid (APTS)-labeled maltohexaose (G6) as a substrate. Amylase in a human plasma sample hydrolyzed APTS-G6 into APTS-maltotriose (G3) and G3, which was measured as the fluorescence intensity of APTS-G3 on microchip electrophoresis. A double logarithm plot revealed a linear relationship between amylase activity and fluorescence intensity in the range of 5-500 U/L of amylase activity (r2=0.9995, p<0.01), and the LOD was 4.38 U/L. Amylase activities in 13 subjects determined by the present method were compared with the results obtained by conventional methods with nitrophenylated oligosaccharides as substrates, respectively. Good correlations were observed for each method on simple linear regression analysis (both p<0.01). The reproducibilities of within-days for total amylase and P-AMY were 2.98-6.27 and 3.83-6.39%, respectively, and these between-days were 2.88-5.66 and 3.64-5.63%, respectively. This system enables us to determine amylase isoenzyme activities in human plasma with high sensitivity and accuracy, and thus will be applicable to clinical diagnosis.
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Affiliation(s)
- Eiki Maeda
- Department of Molecular and Pharmaceutical Biotechnology, Graduate School of Pharmaceutical Sciences, University of Tokushima, Tokushima, Japan
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22
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Ma X, Zhao M, Lin Z, Zhang S, Yang C, Zhang X. Versatile Platform Employing Desorption Electrospray Ionization Mass Spectrometry for High-Throughput Analysis. Anal Chem 2008; 80:6131-6. [DOI: 10.1021/ac800803x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaoxiao Ma
- Department of Chemistry, Key Laboratory for Atomic and Molecular Nanosciences of Education Ministry, Tsinghua University, 100084, Beijing, P. R. China
| | - Mengxia Zhao
- Department of Chemistry, Key Laboratory for Atomic and Molecular Nanosciences of Education Ministry, Tsinghua University, 100084, Beijing, P. R. China
| | - Ziqing Lin
- Department of Chemistry, Key Laboratory for Atomic and Molecular Nanosciences of Education Ministry, Tsinghua University, 100084, Beijing, P. R. China
| | - Sichun Zhang
- Department of Chemistry, Key Laboratory for Atomic and Molecular Nanosciences of Education Ministry, Tsinghua University, 100084, Beijing, P. R. China
| | - Chengdui Yang
- Department of Chemistry, Key Laboratory for Atomic and Molecular Nanosciences of Education Ministry, Tsinghua University, 100084, Beijing, P. R. China
| | - Xinrong Zhang
- Department of Chemistry, Key Laboratory for Atomic and Molecular Nanosciences of Education Ministry, Tsinghua University, 100084, Beijing, P. R. China
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23
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Affiliation(s)
- Karel Klepárník
- Institute of Analytical Chemistry, Academy of Sciences of the Czech Republic, Veveří 97, CZ-602 00 Brno, Czech Republic
| | - Petr Boček
- Institute of Analytical Chemistry, Academy of Sciences of the Czech Republic, Veveří 97, CZ-602 00 Brno, Czech Republic
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24
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Maeda E, Kataoka M, Hino M, Kajimoto K, Kaji N, Tokeshi M, Kido JI, Shinohara Y, Baba Y. Determination of human blood glucose levels using microchip electrophoresis. Electrophoresis 2007; 28:2927-33. [PMID: 17640093 DOI: 10.1002/elps.200600795] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A high-performance monitoring system for human blood glucose levels was developed using microchip electrophoresis with a plastic chip. The combination of reductive amination as glucose labeling with fluorescent 2-aminoacridone (AMAC) and glucose-borate complex formation realized the highly selective detection of glucose even in a complex matrix such as a blood sample. The migration time of a single peak, observed on an electropherogram of AMAC-labeled plasma, closely resembled that of glucose standard solution. The treatment of plasma with hexokinase or glucokinase for glucose phosphorylation resulted in a peak shift from approximately 145 to 70 s, corresponding to glucose and glucose-6-phosphate, respectively. A double-logarithm plot revealed a linear relationship between glucose concentration and fluorescence intensity in the range of 1-300 microM of glucose (r(2) = 0.9963; p <0.01), and the detection limit was 0.92 microM. Furthermore, blood glucose concentrations estimated from the standard curves of three subjects were compared with results obtained by conventional colorimetric analysis using glucose dehydrogenase. Good correlation was observed between methods according to simple linear regression analysis (p <0.05). The reproducibility of the assay was about 6.3-9.1% (RSD) and the within-days and between-days reproducibility were 1.6-8.4 and 5.2-7.2%, respectively. This system enables us to determine blood glucose with high sensitivity and accuracy, and will be applicable to clinical diagnosis.
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Affiliation(s)
- Eiki Maeda
- Department of Molecular and Pharmaceutical Biotechnology, Graduate School of Pharmaceutical Sciences, University of Tokushima, Tokushima, Japan
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25
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Ding Y, Ayon A, García CD. Electrochemical detection of phenolic compounds using cylindrical carbon-ink electrodes and microchip capillary electrophoresis. Anal Chim Acta 2007; 584:244-51. [PMID: 17386611 DOI: 10.1016/j.aca.2006.11.064] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2006] [Revised: 11/22/2006] [Accepted: 11/27/2006] [Indexed: 11/30/2022]
Abstract
A simple method to fabricate cylindrical carbon electrodes for use in capillary electrophoresis (CE) microchips is described. The electrodes were fabricated using a metallic wire coated with carbon ink. Several experimental variables were studied in order to establish the best conditions to fabricate the electrode. Finally, the electrodes were integrated in a poly(dimethylsiloxane) microchip and used for the analysis of phenolic compounds. Using the optimum conditions, the analysis of a mixture of dopamine, epinephrine, catechol, and 4-aminophenol was achieved in less than 240 s, showing good linear responses (R(2)=0.999) in the 0.1-190 microM range, and limits of detection (without the use of stacking or a decoupler) of 140 and 105 nM for dopamine and epinephrine, respectively.
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Affiliation(s)
- Yongsheng Ding
- Department of Chemistry, The University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, United States
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26
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Abstract
In the past few years, electrophoresis microchips have been increasingly utilized to interrogate genetic variations in the human and other genomes. Microfluidic devices can be readily applied to speed up existing genotyping protocols, in particular the ones that require electric field-mediated separations in conjunction with restriction fragment analysis, DNA sequencing, hybridization-based techniques, allele-specific amplification, heteroduplex analysis, just to list the most important ones. As a result of recent developments, microfabricated electrophoresis devices offer several advantages over conventional slab-gel electrophoresis, such as small sample volume requirement, low reagent consumption, the option of system integration and easy multiplexing. The analysis speed of microchip electrophoresis is significantly higher than that of any other electric field-mediated separation techniques. State-of-the-art microfluidic bioanalytical devices already claim their place in most molecular biology laboratories. This review summarizes the recent developments in microchip electrophoresis methods of nucleic acids, particularly for rapid genotyping, that will most likely play a significant role in the future of clinical diagnostics.
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Affiliation(s)
- Eszter Szántai
- Horváth Laboratory of Bioseparation Sciences, Institute of Analytical Chemistry and Radiochemistry, University of Innsbruck, Innsbruck, Austria
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27
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Nishikawa F, Arakawa H, Nishikawa S. Application of microchip electrophoresis in the analysis of RNA aptamer-protein interactions. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2006; 25:369-82. [PMID: 16838832 DOI: 10.1080/15257770600683953] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
DNA and RNA can be separated by microchip electrophoresis (ME) and detected using an intercalating fluorescent dye. The advantages of this method are short sensing times (<3 min), avoidance of a radioisotope labeling detection system, relatively low costs, and reduced labor intensity. In the present study, RNA aptamer-protein or -peptide interactions were analyzed using ME and the regression of free aptamers corresponding to unbound RNA was detected as the target protein or peptide increased in a dose-dependent manner. Our results demonstrate the applicability of this method to simple, rapid ligand screening in the interactions between oligonucleotides and their targets.
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Affiliation(s)
- Fumiko Nishikawa
- Institute for Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan.
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28
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Single-Strand Conformation Polymorphism Analysis by Microchip Electrophoresis for the Rapid Detection of Point Mutation in Human Obesity Gene. B KOREAN CHEM SOC 2006. [DOI: 10.5012/bkcs.2006.27.9.1346] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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Huang H, Bu Y, Zhou GH. Single-tube-genotyping of gastric cancer related SNPs by directly using whole blood and paper-dried blood as starting materials. World J Gastroenterol 2006; 12:3814-20. [PMID: 16804964 PMCID: PMC4087927 DOI: 10.3748/wjg.v12.i24.3814] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To demonstrate an inexpensive method for typing gastric cancer related single nucleotide polymorphisms (SNPs) using whole blood or paper-dried blood as starting materials.
METHODS: PCR amplification is directly carried out from the whole blood or paper-dried blood sample without any DNA extraction step. Before PCR, a blood sample, four primers, and all of biological reagents necessary for PCR were added at a time; After PCR, the amplified products were directly separated by slab gel electrophoresis or microchip CE without any purification. SNP typing was performed by tetra-primer PCR with two inner primers specific to each allele and two outer primers defining the length of allele-specific amplicons. Genotypes were directly discriminated by the size of amplicons specific to each allele, thereby avoiding any post-PCR process.
RESULTS: Using a special PCR buffer, inhibitory substances in blood (including the anticoagulant in blood) and filter paper were effectively suppressed; a “true” single-tube-genotyping is thus realized. We successfully determined genotypes IL-1B-511 and IL-1B-31 polymorphisms at the gene IL-1B by using whole-blood and paper-dried blood samples as starting materials respectively. The method is so sensitive that 0.5-1.0 μL of blood sample is enough to give a satisfactory typing results. The genotyping results were confirmed by RFLP-PCR using purified genome DNA, indicating that amplification specificity was not affected by inhibitory components (including coagulants) in blood or filter paper.
CONCLUSION: Compared with SNP typing methods based on purified DNA, the proposed method is labor-saving, simple, inexpensive, and less cross-contaminated. It is promising to use this method to type other SNPs.
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Affiliation(s)
- Huan Huang
- Medical School, Nanjing University, China
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30
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Abstract
The direction of modern analytical techniques is to push for lower detection limits, improved selectivity and sensitivity, faster analysis time, higher throughput, and more inexpensive analysis systems with ever-decreasing sample volumes. These very ambitious goals are exacerbated by the need to reduce the overall size of the device and the instrumentation - the quest for functional micrototal analysis systems epitomizes this. Microfluidic devices fabricated in glass, and more recently, in a variety of polymers, brings us a step closer to being able to achieve these stringent goals and to realize the economical fabrication of sophisticated instrumentation. However, this places a significant burden on the detection systems associated with microchip-based analysis systems. There is a need for a universal detector that can efficiently detect sample analytes in real time and with minimal sample manipulation steps, such as lengthy labeling protocols. This review highlights the advances in uncommon or less frequently used detection methods associated with microfluidic devices. As a result, the three most common methods - LIF, electrochemical, and mass spectrometric techniques - are omitted in order to focus on the more esoteric detection methods reported in the literature over the last 2 years.
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Affiliation(s)
- Pertti J Viskari
- Department of Chemistry, University of Virginia, Charlottesville, VA 22904, USA
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31
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Kataoka M, Fukura Y, Shinohara Y, Baba Y. Analysis of mitochondrial membrane potential in the cells by microchip flow cytometry. Electrophoresis 2006; 26:3025-31. [PMID: 16078196 DOI: 10.1002/elps.200410402] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The mitochondrial membrane potential (DeltaPsi(m)) is an important indicator of the energetic state of both the mitochondria and the cells. To develop a sensitive, convenient, and rapid method for the measurement of DeltaPsi(m), we carried out cell fluorescence assays using the Agilent 2100 bioanalyzer system which, unlike the conventional flow cytometry, is based on microfluidic technology employing fluorescence detection with a 3,3'-dihexyloxacarbocyanine iodide (DiOC(6)(3)) fluorescent probe. The use of DiOC(6)(3) in the fluorometer was shown to be feasible for monitoring variations in DeltaPsi(m) in the mitochondria isolated from rat liver and treated with rotenone, succinate, ADP, and carbonylcyanide-p-trifluoromethoxyphenylhydrazone (FCCP). Flow cytometry analysis showed severe reduction of fluorescence intensity in Jurkat cells after treatment with 1.0 and 10 microM FCCP. However, fluorescence microscopy demonstrated obvious accumulation of fluorescence in the mitochondria and induction of diffuse cytoplasmic fluorescence not localized to the mitochondria in these cells. The dose response range of DiOC(6)(3) in the Agilent 2100 bioanalyzer system for yielding sufficient fluorescence intensity in the mitochondria of the cells was 20 nm-2.0 microM. Furthermore, significant reduction of fluorescence intensity in the cells stained with 2.0 microM DiOC(6)(3) was observed after treatment with 10 microM FCCP for 30 min. These results indicate that the Agilent 2100 bioanalyzer is potentially useful for monitoring DeltaPsi(m) in cell assays.
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32
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Tanaka Y, Naruishi N, Nakayama Y, Higashi T, Wakida SI. Development of an analytical method using microchip capillary electrophoresis for the measurement of fluorescein-labeled salivary components in response to exercise stress. J Chromatogr A 2006; 1109:132-7. [PMID: 16364340 DOI: 10.1016/j.chroma.2005.11.081] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2005] [Revised: 11/07/2005] [Accepted: 11/23/2005] [Indexed: 11/16/2022]
Abstract
We have developed an analytical method using microchip capillary electrophoresis (microchip CE) for the high-speed separation of fluorescein-labeled salivary components in response to exercise stress. Optimal separation was obtained using a borate buffer at pH 9.5 containing 10 mM beta-cyclodextrin and 1.0% (w/v) methylcellulose. To minimize individual differences in human saliva, such as viscosity, conductivity, and contaminants, the concentration of methylcellulose in the analytical conditions played a key factor. The optimized separation conditions produced identical electropherograms successfully despite of the use of different microchips made from quartz glass or poly-methylmethacrylate (PMMA). In addition, a practical application of bicycle ergometer stress was performed. Some components in human saliva showed a marked decrease after exercise stress.
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Affiliation(s)
- Yoshihide Tanaka
- Human Stress Signal Research Center, National Institute of Advanced Industrial Science and Technology (AIST) 1-8-31, Midorigaoka, Ikeda, Osaka 563-8577, Japan.
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KUDO Y, TSUNOKAWA J, YAGI M, NAKAJIMA H, NAKAGAMA T, ARAI K, YOSHIMURA Y, UCHIYAMA K. Development of Enzyme Linked Solvent Assay on Open-Well Microchip. BUNSEKI KAGAKU 2006. [DOI: 10.2116/bunsekikagaku.55.313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yuki KUDO
- Faculty of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Jun TSUNOKAWA
- Faculty of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Maiko YAGI
- Faculty of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Hizuru NAKAJIMA
- Faculty of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Tatsuro NAKAGAMA
- Faculty of Urban Environmental Sciences, Tokyo Metropolitan University
| | - Kensuke ARAI
- School of Pharmacy, Nihon Pharmaceutical University
| | | | - Katsumi UCHIYAMA
- Faculty of Urban Environmental Sciences, Tokyo Metropolitan University
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34
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Endo Y, Zhang L, Katashima R, Itakura M, Doherty EAS, Barron AE, Baba Y. Effect of polymer matrix and glycerol on rapid single-strand conformation polymorphism analysis by capillary and microchip electrophoresis for detection of mutations in K-ras gene. Electrophoresis 2005; 26:3380-6. [PMID: 16097023 DOI: 10.1002/elps.200500142] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We present the rapid single-strand conformation polymorphism (SSCP) analysis by capillary and microchip electrophoresis to detect the mutations in K-ras gene. Parameters that might affect the analysis of mutation in K-ras gene, such as the polymer and the additive in the sieving matrix, have been studied systematically. Under the optimal conditions, the analysis of seven mutants of K-ras gene could be finished within 10 min by capillary electrophoresis (CE). Furthermore, with the wild-type gene as the inner standard, the analysis accuracy of mutations could be improved. In addition, by studying the properties of polymer solutions, the matrix suitable for microchip electrophoresis was found, and the detection of mutations in K-ras gene could be further shortened to 1 min.
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Affiliation(s)
- Yuki Endo
- Department of Molecular and Pharmaceutical Biotechnology, Graduate School of Pharmaceutical Sciences, The University of Tokushima, Tokushima, Japan
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35
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Kim YJ, Chae JS, Chang JK, Kang SH. Microchip capillary gel electrophoresis using programmed field strength gradients for the ultra-fast analysis of genetically modified organisms in soybeans. J Chromatogr A 2005; 1083:179-84. [PMID: 16078705 DOI: 10.1016/j.chroma.2005.06.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
We have developed a novel method for the ultra-fast analysis of genetically modified organisms (GMOs) in soybeans by microchip capillary gel electrophoresis (MCGE) using programmed field strength gradients (PFSG) in a conventional glass double-T microchip. Under the programmed electric field strength and 0.3% poly(ethylene oxide) sieving matrix, the GMO in soybeans was analyzed within only 11 s of the microchip. The MCGE-PFSG method was a program that changes the electric field strength during GMO analysis, and was also applied to the ultra-fast analysis of PCR products. Compared to MCGE using a conventional and constantly applied electric field, the MCGE-PFSG analysis generated faster results without the loss of resolving power and reproducibility for specific DNA fragments (100- and 250-bp DNA) of GM-soybeans. The MCGE-PFSG technique may prove to be a new tool in the GMO analysis due to its speed, simplicity, and high efficiency.
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Affiliation(s)
- Yun-Jeong Kim
- Department of Chemistry, Chonbuk National University, Jeonju 561-756, South Korea
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36
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Kang SH, Park M, Cho K. Separation of DNA fragments for fast diagnosis by microchip electrophoresis using programmed field strength gradient. Electrophoresis 2005; 26:3179-84. [PMID: 16041706 DOI: 10.1002/elps.200500240] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
We evaluated a novel strategy for fast diagnosis by microchip electrophoresis (ME), using programmed field strength gradients (PFSG) in a conventional glass double-T microfluidic chip. The ME-PFSG allows for the ultrafast separation and enhanced resolving power for target DNA fragments. These results are based on electric field strength gradients (FSG) that use an ME separation step in a sieving gel matrix poly-(ethylene oxide). The gradient can develop staircase or programmed shapes FSG over the time. The PFSG method could be easily used to increase separation efficiency and resolution in ME separation of specific size DNA fragments. Compared to ME that uses a conventional and constantly applied electric field (isoelectrostatic) method, the ME-PFSG achieved about 15-fold faster analysis time during the separation of 100 bp DNA ladder. The ME-PFSG was also applied to the fast analysis of the PCR products, 591 and 1191 bp DNA fragments from the 18S rRNA of Babesia gibsoni and Babesia caballi.
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Affiliation(s)
- Seong Ho Kang
- Department of Chemistry, Chonbuk National University, Jeonju 561-756, South Korea.
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37
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Yan J, Yang X, Wang E. Electrochemical Detection of Anions on an Electrophoresis Microchip with Integrated Silver Electrode. ELECTROANAL 2005. [DOI: 10.1002/elan.200403241] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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38
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Park MR, Lee HS, Kang SH. Multiplex Polymerase Chain Reaction/Microchip Electrophoresis for the Rapid Detection of GMO in Soybean. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2005. [DOI: 10.5012/jkcs.2005.49.3.255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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39
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Zhao C, Xu G, Gao P, Yang J, Shi X, Tian J. Rapid identification of pathogenic bacteria by capillary electrophoretic analysis of rRNA genes. J Sep Sci 2005; 28:513-21. [PMID: 15881080 DOI: 10.1002/jssc.200400079] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Molecular diagnosis is playing an increasingly important role in the rapid detection and identification of pathogenic organisms in clinical samples. The genetic variation of ribosomal genes in bacteria offers an alternative to culturing for the detection and identification of these organisms. Here 16S rRNA and 16S-23S rRNA spacer region genes were chosen as the amplified targets for single-strand conformation polymorphism (SSCP) and restriction fragment length polymorphism (RFLP) capillary electrophoresis analysis and bacterial identification. The multiple fluorescence based SSCP method for the 16S rRNA gene and the RFLP method for the 16S-23S rRNA spacer region gene were developed and applied to the identification of pathogenic bacteria in clinical samples, in which home-made short-chained linear polyacrylamide (LPA) was used as a sieving matrix; a higher sieving capability and shorter analysis time were achieved than with a commercial sieving matrix because of the simplified template preparation procedure. A set of 270 pathogenic bacteria representing 34 species in 14 genera were analyzed, and a total of 34 unique SSCP patterns representing 34 different pathogenic bacterial species were determined. Based on the use of machine code to represent peak patterns developed in this paper, the identification of bacterial species becomes much easier.
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Affiliation(s)
- Chunxia Zhao
- National Chromatographic R & A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116011, China
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40
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Kitagawa F, Aizawa S, Otsuka K. Rapid Enantioseparation of 1-Aminoindan by Microchip Electrophoresis with Linear-Imaging UV Detection. ANAL SCI 2005; 21:61-5. [PMID: 15675518 DOI: 10.2116/analsci.21.61] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Chiral separations of 1-aminoindan (AI) by cyclodextrin electrokinetic chromatography (CDEKC) were investigated on microfluidic quartz chips. By using a microchip electrophoresis (MCE) instrument equipped with a linear-imaging UV detector, the separation process of the enantiomeric compounds was observed. When sulfated beta-cyclodextrin was employed as a chiral selector, the baseline separation of AI could be achieved within 1 min with a high repeatability. The relative standard deviation of the migration time was less than 6%. The fastest separation was achieved in 14 s, utilizing a separation length of only 6.1 mm. These results show that the MCE analysis employing a linear imaging UV detector has a significant potential for fast chiral analysis.
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Affiliation(s)
- Fumihiko Kitagawa
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
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41
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Kim DK, Kang SH. On-channel base stacking in microchip capillary gel electrophoresis for high-sensitivity DNA fragment analysis. J Chromatogr A 2005; 1064:121-7. [PMID: 15729827 DOI: 10.1016/j.chroma.2004.12.045] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We evaluated a novel strategy for high-sensitivity DNA fragment analysis in a conventional glass double-T microfluidic chip. The microchip allows for a DNA on-channel concentration based on base stacking (BS) with a microchip capillary gel electrophoretic (MCGE) separation step in a poly(vinylpyrrolidone) (PVP) sieving matrix. Depending if low conductivity caused a neutralization reaction between the hydroxide ions and the run buffer component Tris+, the stacking of DNA fragments were processed in the microchip. Compared to a conventional MCGE separation with a normal electrokinetic injection, the peak heights of 50-2650-base pair (bp) DNA fragments on the MCGE-BS separation were increased 3.9-8.0-fold. When we applied the MCGE-BS method to the analysis of a clinical sample of bovine theileria after PCR reaction, the peak height intensity of the amplified 816-bp DNA fragment from the 18S rRNA of T. buffeli was enhanced 7.0-fold compared to that of the normal injection method.
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Affiliation(s)
- Dae-Kwang Kim
- Department of Chemistry, Chonbuk National University, Jeonju 561-756, South Korea
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Affiliation(s)
- Fumihiko KITAGAWA
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University
| | - Koji OTSUKA
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University
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Kim YJ, Chae JS, Kang SH. Diagnosis of the ORF Virus Using a Mixture of Sieving Gel Matrixes in Microchip Gel Electrophoresis. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2004. [DOI: 10.5012/jkcs.2004.48.5.483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kataoka M, Inoue S, Kajimoto K, Sinohara Y, Baba Y. Usefulness of microchip electrophoresis for reliable analyses of nonstandard DNA samples and subsequent on-chip enzymatic digestion. ACTA ACUST UNITED AC 2004; 271:2241-7. [PMID: 15153114 DOI: 10.1111/j.1432-1033.2004.04161.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Hitachi SV1100 utilizes capillary electrophoresis on a microchip that is capable of rapidly sizing DNA fragments. Reproducibility of electrophoresis in different channels was shown by comparing the migration times of the internal controls, DNA fragments of 100 and 800 bp. The range of DNA sizing for this microchip is between 100 and 800 bp, and accuracy in sizing of a 322 bp DNA fragment of a pUC118 PvuII digest was observed, independent of DNA concentration. Although relatively good quantification of this fragment was observed with a DNA concentration of 1.83 ng.microL(-1), error increased in a dose-dependent manner. Furthermore, the feasibility of sequential analysis with this microchip was shown by the reproducibility of successive electrophoreses of the internal control in one channel. When the pUC118 PvuII digest was treated with endonuclease KpnI on the microchip for 10 min, sequential analysis showed that the 322 bp fragment completely disappeared and two peaks corresponding to the 130 and 192 bp fragments appeared. This analysis was performed within 4 min, and the peaks were estimated as 127 and 183 bp, respectively. These results indicate the potential of on-microchip endonuclease treatment of plasmid DNA with sequential analysis, offering high resolution in a short time.
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Affiliation(s)
- Masatoshi Kataoka
- Division of Gene Expression, Institute for Genome Research, The University of Tokushima, Kuramotocho 3-18, Tokushima 770-8503, Japan.
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Garcıa CD, Henry CS. Enhanced determination of glucose by microchip electrophoresis with pulsed amperometric detection. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2003.11.060] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Liu Y, Garcia CD, Henry CS. Recent progress in the development of muTAS for clinical analysis. Analyst 2003; 128:1002-8. [PMID: 12964597 DOI: 10.1039/b306278n] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yan Liu
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
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