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Disposable, Microfluidic Microchip for Disease Screening

September 21st, 2006 Medgadget Editors Diagnostics

Engineers from the Virginia Bioinformatics Institute (VBI) at Virginia Tech have developed this interesting disease-screening microchip:

The lab-on-a-chip integrates a pump, valve, separation column, and detection interface onto a 3- by 1-inch glass microchip and delivers a performance to match benchtop instrumentation typically occupying a few square feet of lab space.
Dr Iuliana Lazar, Assistant Professor at VBI, commented: “Microfluidic devices have emerged as powerful and reliable analysis platforms for proteomic applications and biomarker screening. The miniature format as well as the ability to manipulate small amounts of sample result in short analysis times and significant reductions in cost.” Dr. Lazar added: “Using the microchip that we have developed in our laboratory, sample injection, separation, labeling and detection can be performed routinely in a few minutes. Increased specificity and sensitivity are paving the way for high-throughput testing that will permit screening at the population level for prognostic or diagnostic markers for a whole range of diseases.”
The system combines liquid chromatographic separation of proteins driven by hundreds of parallel micro- and nanochannels. These channels, which have dimensions in the micrometer domain, serve to generate an electroosmotic flow. This flow of liquid helps to separate the proteins which are then identified by state-of-the-art mass spectrometric detection instruments. Researchers in Dr. Lazar’s laboratory used the microchip to detect cancer biomarkers in cellular extracts generated from the MCF7 breast cancer cell line. 77 proteins were identified with confidence, five of which are known to be cancer-specific biomarkers. The fully integrated microfluidic liquid chromatography system has been shown to be suitable for the detection of multiple disease-specific biomarkers.

The press release…
The story at Virginia Tech…
(hat tip: MTB Europe)

Medgadget Editors

Medical technologies transform the world! Join us and see the progress in real time. At Medgadget, we report the latest technology news, interview leaders in the field, and file dispatches from medical events around the world since 2004.

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