Time-saving multiplex detection of single nucleotide polymorphisms by ultrasensitive DNA microarray

Makiko Ichikawa, Keishi Miwa, Tomo Yamasaki, Izumi Nakagawa, Satoko Takizawa, Satohiro Masuda, Ken Ichi Inui

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Rapid and multiplex detection system using an ultrasensitive DNA microarray was developed and utilized for the analysis of six pharmacokinetically relevant single nucleotide polymorphisms (SNPs) (MDR1-C1236T, MDR1-G2677TA, MDR1-C3435T, CYP3A5-A6986G, CYP2C19-G681A, CYP2C19-G636A) from blood samples derived from liver transplant patients. The SNP detection system is comprised of three processes: multiplex PCR, single base extension with fluorescently labelled di-deoxy-nucleotides and detection by DNA microarray. The entire workflow of this system completes within 5 h. The final genotype call was obtained statistically by Mahalanobis distance which was calculated from the bi-coloured fluorescent signals detected by the microarray. In order to detect the six SNPs, this system required only 50 copies of genomic DNA, and the obtained detection calls completely matched with the results by the sequencing-based genotyping method. With the high sensitivity and rapid processing, our SNP detection system utilizing ultrasensitive microarray is a promising device applicable for diagnostic utility.

Original languageEnglish
Pages (from-to)557-563
Number of pages7
JournalJournal of biochemistry
Issue number5
Publication statusPublished - Nov 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Biology


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