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New technology pinpoints genetic differences between cancer and non-cancer patients
Date:2/22/2011

A group of researchers led by scientists from the Virginia Bioinformatics Institute (VBI) at Virginia Tech have developed a new technology that detects distinct genetic changes differentiating cancer patients from healthy individuals and could serve as a future cancer predisposition test.

The multidisciplinary team, which includes researchers from the University of Texas Southwestern Medical Center, has created a design for a new DNA microarray that allows them to measure the two million microsatellites (short, repetitive DNA sequences) found within the human genome using 300,000 probes.

Microsatellites, which tend to vary greatly among individuals and have traditionally been used in forensics and paternity tests, are also used to uncover information related to a number of other genetic diseases such as Fragile-X or Huntington's disease. This advancement aided the discovery of a unique pattern of microsatellite variation in breast cancer patients that were not present in the DNA of patients who are cancer-free. Through their evaluation of global changes in the genome, the researchers determined that this pattern change alludes to a new mechanism disrupting the genome in cancer patients and may represent a new breast cancer risk biomarker. The results of the work will be featured in an upcoming edition of the journal Genes, Chromosomes and Cancer. The study is available online (http://www.ncbi.nlm.nih.gov/pubmed/21240973).

"We have now arrived at a new biomarker an indicator that could be used to evaluate the amount of risk that you have for developing cancer in the future," explained Harold "Skip" Garner, VBI executive director who leads the institute's Medical Informatics and Systems Division (http://bit.ly/g280kb). "This is part of an effort to understand their (microsatellite) role in the genome and then proceed on directly towards something that is of utility in t
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Contact: Susan Bland
subland@vbi.vt.edu
540-231-7912
Virginia Tech
Source:Eurekalert

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