Platelet-derived growth factor oncoprotein detection using three-dimensional carbon microarrays

Varun Penmatsa, A. Rahim Ruslinda, Majid Beidaghi, Hiroshi Kawarada, Chunlei Wang

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The potential of aptamers as ligand binding molecule has opened new avenues in the development of biosensors for cancer oncoproteins. In this paper, a label-free detection strategy using signaling aptamer/protein binding complex for platelet-derived growth factor (PDGF-BB) oncoprotein detection is reported. The detection mechanism is based on the release of fluorophore (TOTO intercalating dye) from the target binding aptamer's stem structure when it captures PDGF. Amino-terminated three-dimensional carbon microarrays fabricated by pyrolyzing patterned photoresist were used as a detection platform. The sensor showed near linear relationship between the relative fluorescence difference and protein concentration even in the sub-nanomolar range with an excellent detection limit of 5. pmol. This detection strategy is promising in a wide range of applications in the detection of cancer biomarkers and other proteins.

Original languageEnglish
Pages (from-to)118-123
Number of pages6
JournalBiosensors and Bioelectronics
Volume39
Issue number1
DOIs
Publication statusPublished - 2013 Jan 15

Keywords

  • 3D carbon microarrays
  • Direct amination
  • Fluorescence detection
  • Platelet-derived growth factor

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

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