Microfluidic DNA Stretching Device for Single-Molecule Diagnostics

  • Daisuke OnoshimaEmail author
  • Yoshinobu Baba
Part of the Methods in Molecular Biology book series (MIMB, volume 1547)


The method described here enables the automatic stretching and patterning of single DNA molecules onto a solid surface. It does not require chemical modification of the DNA or surface modification of the substrate. To detect a signal variation caused by sequence-specific dye binding or partial melting, it is crucial that the DNA molecules are arrayed in a parallel direction inside the narrow microscopic field. The method uses zigzag-shaped microgrooves in a densely-arranged molecular patterning apparatus in a microfluidic channel. By syringing through the microchannel, over 1500 DNA molecules can be arrayed simultaneously in the microgrooves. It will therefore serve as a template preparation for DNA molecular diagnosis by high-resolution imaging.

Key words

Microfluidic device Single-Molecule detection DNA stretching Optical mapping Molecular diagnosis 



This work was supported by JSPS KAKENHI Grant Number 26750146. This research is partly supported by the Japan Society for the Center of Innovation Program from Japan Science and Technology Agency, JST.


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© Springer Science+Business Media LLC 2017

Authors and Affiliations

  1. 1.Institute of Innovation for Future SocietyNagoya UniversityNagoyaJapan
  2. 2.ImPACT Research Center for Advanced NanobiodevicesNagoya UniversityNagoyaJapan
  3. 3.Department of Applied Chemistry, Graduate School of EngineeringNagoya UniversityNagoyaJapan
  4. 4.Health Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST)TakamatsuJapan

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