A polydiacetylene microchip based on a biotin-streptavidin interaction for the diagnosis of pathogen infections

Yun Kyung Jung, Tae Won Kim, Cheulhee Jung, Dae Yeon Cho, Hyun Gyu Park

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

A micropatterned polydiacetylene (PDA) chip, utilizing the unique fluorogenic property of PDA and a specific biotin-streptavidin (STA) interaction, is constructed to detect pathogen infections. To construct the PDA chip, biotin-modified diacetylene liposomes are immobilized on aldehyde glass and conjugated with STA, followed by UV irradiation to polymerize the STA-functionalized diacetylene liposomes. Genomic DNA of a model pathogen, Chlamydia trachomatis, is isolated from human samples and biotin-labeled target DNA is obtained through PCR amplification using biotin-11-dUTP. Owing to the stimulus caused by the biotin-STA interaction, the biotinylated DNA induces an intense fluorescence signal on the immobilized PDA. By using this strategy, it is possible to diagnose Chlamydia infections by applying DNA samples from several nonhealthy humans to a single PDA chip. The results of this study serve as the basis for a new strategy for fluorogenic PDA microarray-based diagnosis of pathogen infections.

Original languageEnglish
Pages (from-to)1778-1784
Number of pages7
JournalSmall
Volume4
Issue number10
DOIs
Publication statusPublished - 2008 Oct

Keywords

  • Biochips
  • Diagnostics
  • Medicine
  • Nucleic acids
  • Polydiacetylene

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)

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