SPECTROSCOPY/NANOTECHNOLOGY: SERS approach detects infection before symptoms appear

A new proof-of-concept approach uses light to detect infections before patients show symptoms.1 Biomedical engineers and genome researchers at Duke University (Durham, NC) have teamed up to develop a nanoparticle able to find a molecular marker that appears in the bloodstream at very early stages of an infection. When light is aimed at a sample of infected blood, the nanoparticle—attached to the marker—reflects back.

The researchers demonstrated the approach in human samples; they are now developing the technique for placement on a chip, which they say could provide fast, simple, and reliable information. A diagnostic device based on this chip also could be made portable.

The operation of the approach is a demonstration of surface-enhanced Raman scattering (SERS): When light is shined on a sample, the target molecule vibrates and scatters back its distinct optical fingerprint, called the Raman scatter. While the Raman response is extremely weak, coupling the molecule with a metal nanoparticle enhances it—often by more than a million times, according to Tuan Vo-Dinh, a distinguished professor of biomedical engineering at Duke's Pratt School of Engineering and director of the Fitzpatrick Institute for Photonics.

The study paves the way for development of devices that measure multiple genome-derived markers, which will enable faster and more accurate diagnosis of infectious disease at the point of care, said Geoffrey Ginsburg, director of genomic medicine at Duke's Institute for Genome Sciences & Policy (IGSP). IGSP scientists separately developed a method of measuring host response to infection through RNA profiling.

Ginsburg noted that care decisions based on the resulting information will lead to more effective treatment and improved outcomes, and added, "Point-of-care diagnostics holds great promise to accelerate precision medicine and, more importantly, help patients in limited-resource settings gain access to molecular testing."

1. H.N. Wang et al., Analytica Chimica Acta, 786, 153–158 (2013).

Get All the BioOptics World News Delivered to Your Inbox

Subscribe to BioOptics World Magazine or email newsletter today at no cost and receive the latest news and information.

 Subscribe Now
Related Articles

Merz acquires laser tattoo removal device maker ON Light Sciences

Merz North America has acquired ON Light Sciences, which develops technologies to enhance laser-based dermatology procedures.

Shortwave-infrared device could improve ear infection diagnosis

An otoscope-like device that could improve ear infection diagnosis uses shortwave-infrared light instead of visible light.

Laser therapy extracts rare tumor that grew human hair, skin in boy's skull

About four years ago, a tumor comprised of human skin, hair, bone and cartilage was fast-growing inside a Ramsey, MN, 10-year-old youth's brain.

Low-level laser therapy could speed muscle recovery at Rio 2016 Olympics

The gold medal-winning women’s U.S. Gymnastics team is reportedly experimenting with infrared light therapy to alleviate pain and reduce swelling in its athletes. (Update: A spokesperson for ...

Neuro15 exhibitors meet exacting demands: Part 2

Increasingly, neuroscientists are working with researchers in disciplines such as chemistry and p...

Why be free?

A successful career contributed to keeping OpticalRayTracer—an optical design software program—fr...

LASER Munich 2015 is bio-bent

LASER World of Photonics 2015 included the European Conferences on Biomedical Optics among its si...

White Papers

Understanding Optical Filters

Optical filters can be used to attenuate or enhance an image, transmit or reflect specific wavele...

How can I find the right digital camera for my microscopy application?

Nowadays, image processing is found in a wide range of optical microscopy applications. Examples ...



Twitter- BioOptics World