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Scientists Report Key Finding in Breast Cancer Research
Date:4/16/2010

Study links cancer growth to sugar-based modification found naturally in the body.

Philadelphia, PA (Vocus) April 16, 2010 -- Researchers at Drexel University College of Medicine have discovered that a certain type of sugar found naturally in the body is elevated in breast cancer cells and is critical for cancer growth and movement. When researchers reduced and normalized the levels of this sugar, they were able to slow the growth of the cancer cells and block invasion. The findings, published in the March 1 issue of Oncogene, represent a potential new therapeutic target for treating aggressive forms of breast cancer.

Scientists have known for years that cancer cells are addicted to sugar. Compared to neighboring normal cells, cancer cells take up nearly ten times more sugar. The cancer cells use the increased sugar levels to fuel rapid cell growth and spread. The Drexel researchers studied a particular sugar-based protein modification known as O-GlcNAc. Alterations in this modification have been linked previously to diabetes and Alzheimer’s disease, but not to cancer.

“This sugar, O-GlcNAc, is used inside cells to tag proteins and alter their function,” said lead author Mauricio J. Reginato, Ph.D., assistant professor in the Department of Biochemistry and Molecular Biology at Drexel University College of Medicine. “We think this is a very exciting discovery because this may be one way that cancer cells use the increased sugar to regulate key pathways that control growth and invasion.”

Reginato and his colleagues studied established cells from patients with estrogen-independent breast cancer, the most aggressive form of the disease, which does not respond well to current treatments. The researchers fo
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