Optoacoustic detection of viral antigens using targeted gold nanorods

Saher Maswadi, Lee Woodward, Randolph D. Glickman, Norman Barsalou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We are detecting antigens (Ag), isolated from infectious organisms, utilizing laser optoacoustic spectroscopy and antibody-coupled gold nanorod (NR) contrast agents specifically targeted to the antigen of interest. We have detected, in clinical ocular samples, both Herpes Simplex Virus Type 1 and 2 (HSV-1 and HSV-2). A monoclonal antibody (Ab) specific to both HSV-1 and HSV-2 was conjugated to gold nanorods to produce a targeted contrast agent with a strong optoacoustic signal. Elutions obtained from patient corneal swabs were adsorbed in standard plastic micro-wells. An immunoaffinity reaction was then performed with the functionalized gold nanorods, and the results were probed with an OPO laser, emitting wavelengths at the peak absorptions of the nanorods. Positive optoacoustic responses were obtained from samples containing authentic (microbiologically confirmed) HSV-1 and HSV-2. To obtain an estimate of the sensitivity of the technique, serial dilutions from 1 mg/ml to 1 pg/ml of a C. trachomatis surface Ag were prepared, and were probed with a monoclonal Ab, specific to the C. trachomatis surface Ag, conjugated to gold nanorods. An optoacoustic response was obtained, proportional to the concentration of antigen, and with a limit of detection of about 5 pg/ml. The optoacoustic signals generated from micro-wells containing albumin or saline were similar to those from blank wells. The potential benefit of this method is identify viral agents more rapidly than with existing techniques. In addition, the sensitivity of the assay is comparable or superior to existing colorimetric- or fluorometric-linked immunoaffinity assays.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume7177
DOIs
StatePublished - 2009
EventPhotons Plus Ultrasound: Imaging and Sensing 2009 - San Jose, CA, United States
Duration: Jan 25 2009Jan 28 2009

Other

OtherPhotons Plus Ultrasound: Imaging and Sensing 2009
CountryUnited States
CitySan Jose, CA
Period1/25/091/28/09

Fingerprint

Nanorods
Photoacoustic effect
Viral Antigens
antigens
Antigens
Gold
nanorods
gold
antibodies
Monoclonal antibodies
Monoclonal Antibody
Surface Antigens
Contrast Media
Assays
Monoclonal Antibodies
Photoacoustic spectroscopy
Laser Spectroscopy
elution
Laser spectroscopy
sensitivity

Keywords

  • Antigen
  • Gold nanorod
  • Herpes simplex virus
  • Laser
  • Optoacoustic
  • Spectroscopy
  • Viral detection

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Maswadi, S., Woodward, L., Glickman, R. D., & Barsalou, N. (2009). Optoacoustic detection of viral antigens using targeted gold nanorods. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 7177). [71771Q] https://doi.org/10.1117/12.809186

Optoacoustic detection of viral antigens using targeted gold nanorods. / Maswadi, Saher; Woodward, Lee; Glickman, Randolph D.; Barsalou, Norman.

Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7177 2009. 71771Q.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Maswadi, S, Woodward, L, Glickman, RD & Barsalou, N 2009, Optoacoustic detection of viral antigens using targeted gold nanorods. in Progress in Biomedical Optics and Imaging - Proceedings of SPIE. vol. 7177, 71771Q, Photons Plus Ultrasound: Imaging and Sensing 2009, San Jose, CA, United States, 1/25/09. https://doi.org/10.1117/12.809186
Maswadi S, Woodward L, Glickman RD, Barsalou N. Optoacoustic detection of viral antigens using targeted gold nanorods. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7177. 2009. 71771Q https://doi.org/10.1117/12.809186
Maswadi, Saher ; Woodward, Lee ; Glickman, Randolph D. ; Barsalou, Norman. / Optoacoustic detection of viral antigens using targeted gold nanorods. Progress in Biomedical Optics and Imaging - Proceedings of SPIE. Vol. 7177 2009.
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