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Date:6/16/2010

provides a convenient means to display thousands of different proteins. Further, proteins used in NAPPA are synthesized freshly for each experiment and do not require the lengthy processes of purification necessary with conventional protein arrays.

When the team screened the 19 selected ScFvs, they found that about two thirds stuck to a target in the NAPPA array, allowing for positive identification. Intriguingly, these distinct ScFvs bound with the same protein, evidentially attaching to different regions. As LaBaer notes, this fact offers tantalizing hints that the technique may indeed have sniffed out a consistent biomarker for ovarian cancer, rather than anomalous proteins lacking true predictive power.

The study also examined proximal tumor fluid for ovarian cancer, detecting in high concentrations the key protein antigens identified with the microarray. According to LaBaer, this finding provides further support for the idea that these proteins are indeed associated with ovarian cancer, and do not represent mere anomalies.

Ramirez and Lampe plan follow-up work to further validate the proteins discovered and assess their clinical value as early detectors of ovarian cancer. They also have protein candidates for other cancers and hope to screen these as potential biomarkers, using LaBaer's NAPPA technology.


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Contact: Kimberly Ovitt
Kimberly.Ovitt@asu.edu
Arizona State University
Source:Eurekalert  

Page: 1 2 3

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