Matrix-insensitive protein assays push the limits of biosensors in medicine

Research output: Contribution to journalJournal articleResearchpeer-review

  • Richard S Gaster
  • Drew A Hall
  • Nielsen, Carsten Haagen
  • Sebastian J Osterfeld
  • Heng Yu
  • Kathleen E Mach
  • Robert J Wilson
  • Boris Murmann
  • Joseph C Liao
  • Sanjiv S Gambhir
  • Shan X Wang
Advances in biosensor technologies for in vitro diagnostics have the potential to transform the practice of medicine. Despite considerable work in the biosensor field, there is still no general sensing platform that can be ubiquitously applied to detect the constellation of biomolecules in diverse clinical samples (for example, serum, urine, cell lysates or saliva) with high sensitivity and large linear dynamic range. A major limitation confounding other technologies is signal distortion that occurs in various matrices due to heterogeneity in ionic strength, pH, temperature and autofluorescence. Here we present a magnetic nanosensor technology that is matrix insensitive yet still capable of rapid, multiplex protein detection with resolution down to attomolar concentrations and extensive linear dynamic range. The matrix insensitivity of our platform to various media demonstrates that our magnetic nanosensor technology can be directly applied to a variety of settings such as molecular biology, clinical diagnostics and biodefense.
Original languageEnglish
JournalNature Medicine
Volume15
Issue number11
Pages (from-to)1327-1332
Number of pages6
ISSN1078-8956
DOIs
Publication statusPublished - 2009

Bibliographical note

Keywords: Animals; Biological Assay; Biosensing Techniques; Carcinoembryonic Antigen; Disease Models, Animal; Enzyme-Linked Immunosorbent Assay; Humans; Hydrogen-Ion Concentration; Magnetic Resonance Spectroscopy; Mice; Nanotechnology; Optics and Photonics; Proteins; Reproducibility of Results; Sensitivity and Specificity; Temperature; Time Factors; Vascular Endothelial Growth Factor A; Xenograft Model Antitumor Assays

ID: 20195002