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Rapid Separation and Laser-Induced Fluorescence Detection of Mutated DNA by Capillary Electrophoresis in a Self-Coating, Low Viscosity Polymer Matrix
ELECTROPHORESIS
  • Ming Du
  • James H. Flanagan, Jr.
  • Bingcheng Lin
  • Yinfa Ma, Missouri University of Science and Technology
Abstract

The detection of point and other simple mutations in DNA is important for cancer research and diagnosis and other biological studies. Capillary electrophoresis has been successfully used for separating DNA fragments. However, a low-viscosity polymer sieving buffer for DNA separation with on-line coating has never been reported. In this paper, a new method using capillary electrophoresis with on-line coating and laser-induced fluorescence detection (CE-LIF) for screening for point or simple DNA mutations has been demonstrated. The method uses an on-line dynamic coating technique that increases capillary lifetime and analysis reproducibility, and employs a low-viscosity polymer solution, which allows the user to rinse the capillary rapidly and refill with polymer solution easily. Experiments proved that the additives in the separation buffer for on-line capillary coating do not affect the separation efficiency of the running buffer, and do not interfere with the formation of hydrogen-bonded network between boric acid, mannitol and hydroxypropylmethylcellulose polymers. The stability of the dynamically coated capillary was quantitatively studied; the capillary lifetime was increased 6- to 7-fold compared with that of permanently coated CE columns. Standard DNA fragments containing mutations, with sizes of 209, 219, and 338 bps, were successfully separated and detected with this system, after the mutated DNA fragments were cleaved by CEL-I endonuclease. The technique is very sensitive for the size-separation of low-range, middle-range, and high-range DNA fragments. Results were compared with the HPLC methods developed by Transgenomic, Inc. And were in good agreement. The method should be applicable to mutation detection for all relevant biological and clinical studies. The factors influencing separations and the stability of dynamic capillary coatings are also discussed in the paper.

Department(s)
Chemistry
Sponsor(s)

University of Missouri--Rolla
Transgenomic Inc.

Comments

This work was supported by a startup fund to Dr. Yinfa Ma from the University of Missouri--Rolla and Transgenomic, Inc.

Keywords and Phrases
  • Capillary Electrophoresis,
  • DNA Mutation,
  • Dynamic Coating
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2003 Wiley-VHC Verlag GmbH & Co. KGaA, All rights reserved.
Publication Date
9-1-2003
Publication Date
01 Sep 2003
Disciplines
Citation Information
Ming Du, James H. Flanagan, Bingcheng Lin and Yinfa Ma. "Rapid Separation and Laser-Induced Fluorescence Detection of Mutated DNA by Capillary Electrophoresis in a Self-Coating, Low Viscosity Polymer Matrix" ELECTROPHORESIS Vol. 24 Iss. 18 (2003) p. 3147 - 3153 ISSN: 0173-0835
Available at: http://works.bepress.com/yinfa-ma/62/