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Compendium of pancreatic cancer biomarkers established as strategic approach to early-detection
Date:4/6/2009

A cancer scientist from Johns Hopkins has convinced an international group of colleagues to delay their race to find new cancer biomarkers and instead begin a 7,000-hour slog through a compendium of 50,000 scientific articles already published to assemble, decode and analyze the molecules that might herald the furtive presence of pancreatic cancer.

With limited resources available for the exhaustive and expensive testing that needs to be done before any candidate can be considered a bona fide biomarker of clinical value, it's important to take stock of the big picture and strategize, says Akhilesh Pandey, M.D., Ph.D., an associate professor in the McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, and founder and director of the Institute of Bioinformatics in Bangalore, India.

Having mined the literature to amass 2,516 potential biomarkers of pancreatic cancer, Pandey and his team are publishing their compendium on April 6 in PLoS Medicine. They systematically cataloged the genes and proteins that are overexpressed in pancreatic cancer patients, then characterized and compared these biomarker candidates in terms of how worthy each is of further study.

More than 200 genes are shortlisted because they were reported in four or more published studies to be overexpressed meaning that the proteins they make are in higher abundance in people with pancreatic cancer than in people without the disease. This qualifies them as "excellent candidates" for the further studies that are needed to validate them as sensitive and specific biomarkers, note the authors.

Pandey says he was motivated by the fact that even leading cancer investigators had no real idea about how many candidate biomarkers for pancreatic cancer had already been identified, much less how they stacked up against each other in terms of clinical value in detecting early stages of the disease. Such biomarkers are hi
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Contact: Maryalice Yakutchik;
myakutc1@jhmi.edu
443-287-2251
Johns Hopkins Medical Institutions
Source:Eurekalert

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