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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51824

Title: Using a microfluidic device for 1 microl DNA microarray hybridization in 500 s.
Authors: Cheng-Wey Wei
Ji-Yen Cheng
Chih-Ting Huang
Meng-Hua Yen
Tai-Horng Young
Contributors: 國立臺灣海洋大學:機械與機電工程學系
Date: 2005-05
Issue Date: 2018-12-25T08:02:00Z
Publisher: Nucl. Acid. Res. Methods
Abstract: Abstract: This work describes a novel and simple modification of the current microarray format. It reduces the sample/reagent volume to 1 microl and the hybridization time to 500 s. Both 20mer and 80mer oligonucleotide probes and singly labeled 20mer and 80mer targets, representative of the T-cell acute lymphocytic leukemia 1 (TAL1) gene, have been used to elucidate the performance of this hybridization approach. In this format, called shuttle hybridization, a conventional flat glass DNA microarray is integrated with a PMMA microfluidic chip to reduce the sample and reagent consumption to 1/100 of that associated with the conventional format. A serpentine microtrench is designed and fabricated on a PMMA chip using a widely available CO2 laser scriber. The trench spacing is compatible with the inter-spot distance in standard microarrays. The microtrench chip and microarray chip are easily aligned and assembled manually so that the microarray is integrated with a microfluidic channel. Discrete sample plugs are employed in the microchannel for hybridization. Flowing through the microchannel with alternating depths and widths scrambles continuous sample plug into discrete short plugs. These plugs are shuttled back and forth along the channel, sweeping over microarray probes while re-circulation mixing occurs inside the plugs. Integrating the microarrays into the microfluidic channel reduces the DNA-DNA hybridization time from 18 h to 500 s. Additionally, the enhancement of DNA hybridization reaction by the microfluidic device is investigated by determining the coefficient of variation (CV), the growth rate of the hybridization signal and the ability to discriminate single-base mismatch. Detection limit of 19 amol was obtained for shuttle hybridization. A 1 mul target was used to hybridize with an array that can hold 5000 probes.
Relation: 33(8)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/51824
Appears in Collections:[機械與機電工程學系] 期刊論文

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