The expression pattern of certain genes may someday help doctors to diagnose and predict whether or not an individual has an aggressive form of B-cell chronic lymphocytic leukemia (CLL), Jefferson cancer researchers have found.
Scientists, led by Carlo Croce, M.D., director of Jeffersons Kimmel Cancer Center and professor and chair of microbiology and immunology at Jefferson Medical College of Thomas Jefferson University in Philadelphia, looked at the expression of genes that encoded microRNAs (miRNAs), tiny pieces of genetic material that are thought to be important in the regulation of gene expression and in the development of cancer. MiRNAs can serve as stop signs for gene expression and protein synthesis, and are thought to play important roles in regulating gene expression in development.
Reporting in both the online and the August 10 print version of the Proceedings of the National Academy of Sciences, the researchers – taking advantage of a microarray chip Dr. Croce and his colleagues designed that carries all the known human miRNA genes – compared the expression of miRNA genes in human CLL samples with that of normal white blood cells, or lymphocytes, called CD5+ B cells. CLL, the most common adult leukemia in the Western world, is characterized by an abnormal increase in the number of B cells.
Steve Benowitz | EurekAlert!
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