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Gene discovery could improve treatment for acute myeloid leukemia
Date:8/13/2012

August 13, 2012 ─ (BRONX, NY) ─ Scientists at Albert Einstein College of Medicine of Yeshiva University have made a discovery involving mice and humans that could mean that people with acute myeloid leukemia (AML), a usually fatal cancer, are a step closer to new treatment options. Their study results were published online today in Cancer Cell.

"We have discovered that a gene called HLX is expressed at abnormally high levels in leukemia stem cells in a mouse model of AML," said Ulrich Steidl, M.D., Ph.D., assistant professor of cell biology and of medicine at Einstein and senior author of the paper. (Gene expression is the process by which a gene synthesizes the molecule that it codes for; an "over-expressed" gene makes its product in abnormally high amounts.)

According to the National Cancer Institute, AML will be diagnosed in one of every 254 people during their lifetime. Most die within a few years of diagnosis. For the last several decades there has been little improvement in the survival rate for AML patients.

Dr. Steidl and his colleagues found that over-expression of the HLX gene in mice caused blood-forming stem cells to become dysfunctional and develop into abnormal progenitors (biological ancestors) of white blood cells that failed to differentiate into normal blood cells. Instead, those early, abnormal white cells formed duplicates of themselves.

The researchers then analyzed HLX expression data collected from 354 AML patients and found that 87 percent of them were over-expressing HLX compared with HLX expression in healthy i
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Contact: Kimberly Newman
sciencenews@einstein.yu.edu
718-430-3101
Albert Einstein College of Medicine
Source:Eurekalert

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