Analytical Sciences

Abstract − Analytical Sciences, 32(6), 603 (2016).

Detection of Methylated DNA on a Power-Free Microfluidic Chip with Laminar Flow-Assisted Dendritic Amplification
Kazuki HASEGAWA,*,** Mutsuyoshi MATSUMOTO,** Kazuo HOSOKAWA,* and Mizuo MAEDA*
*Bioengineering Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
**Department of Materials Science and Technology, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo 125-8585, Japan
We report on a detection method for methylated DNA on a microfluidic chip, which needs no external power for fluid pumping. The methylated DNA was sandwiched by immobilized probe DNA and an anti-methylcytosine antibody. The fluorescence signal was amplified by our original amplification technology. The detection method was first optimized using a 22-mer DNA sequence, then further validated using a 60-mer DNA sequence adapted from the SEPT9 gene. We were able to detect the methylated 60-mer DNA at 0.4 nM within 18 min.