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UAB researchers find 4 biomarkers important in colorectal cancer treatment prognosis
Date:4/19/2010

BIRMINGHAM, Ala. Researchers at the University of Alabama at Birmingham (UAB) Department of Pathology have discovered a set of four biomarkers that will help predict which patients are more likely to develop aggressive colorectal cancer and which are not. The findings also shed light on the genetics that result in worse colorectal cancer-treatment outcomes for African-Americans, compared with Caucasians, the researchers said.

In data presented April 19 at the American Association of Cancer Research annual meeting in Washington, D.C., Liselle Bovell, a graduate student working in the laboratory of UAB Associate Professor of Pathology Upender Manne, Ph.D., discovered that patients who tested positive for higher levels of a genetic biomarker called microRNA (miRNA) had increased risk of death after being treated for colorectal cancer.

In genetic tests of tumor samples from the patients, the presence of higher levels of miRNA-21 and miR-106a signaled poorer prognosis after treatment for both Caucasian and African-American patients compared with patients who did not have the higher miRNA levels. The presence of higher levels of miR-181b and miR-203 signaled poorer prognosis after treatment for African-American patients, but not for Caucasians.

"This knowledge gives us solid, prognostic information, so we can better manage patients with these cancers early after diagnosis or surgery," Bovell said.

Nobel Laureate Philip A. Sharp, Ph.D., of the Koch Institute for Integrative Cancer Research at the Massachusetts Institute of Technology, hosted a press conference at the annual meeting that included Bovell and other researchers. In a statement, Sharp said, "The science of miRNAs and related small RNAs will continue to generate new insights into cancer and possible future treatment."

The UAB researchers analyzed data from 218 patients who underwent surgery and other treatments for colorectal cancer at UAB Hospital between
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Contact: Troy Goodman
tdgoodman@uab.edu
205-934-8938
University of Alabama at Birmingham
Source:Eurekalert

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