Nanosensors: Design and application to site-specific cellular analyses


Journal Article

We report the development and application of an antibody-based nanoprobe for in situ measurements within a single cell. The nanoprobe has an antibody-based probe targeted to benzopyrene tetrol (BPT), a metabolite of the carcinogen benzo[a]pyrene (BaP) and the BaP-DNA adduct. Detection of BPT is of biomedical interest since this species can potentially serve as a biomarker for the monitoring of DNA damage due to BaP exposure and for possible pre-cancer diagnoses. The measurements were performed on the rat liver epithelial Clone 9 cell line, which was used as the model cell system. Nanoprobes were inserted into individual cells, incubated five minutes to allow antigen-antibody binding, and then removed for fluorescence detection. Prior to measurements, the cells had been treated with BPT. A concentration of 9.6 ± 0.2 × 10-11 M has been determined for BPT in the individual cells investigated. The results demonstrate the possibility of in situ measurements inside a single cell using an antibody-based nanoprobes.

Full Text

Duke Authors

Cited Authors

  • Cullum, BM; Griffin, GD; Vo-Dinh, T

Published Date

  • January 1, 2002

Published In

Volume / Issue

  • 4615 /

Start / End Page

  • 148 - 154

International Standard Serial Number (ISSN)

  • 0277-786X

Digital Object Identifier (DOI)

  • 10.1117/12.466642

Citation Source

  • Scopus