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Expanding cell girth indicates seriousness of breast cancer
Date:9/18/2008

WEST LAFAYETTE, Ind. - How fat cells become after being exposed to a specialized electrical field is helping researchers determine whether cells are normal, cancerous or a stage of cancer already invading other parts of the body.

Purdue University scientists tested the electrical process and found cells that expanded the most were metastatic cancer, the term used when the disease has spread beyond its point of origin. The technique allows screening of single cells 300 times faster - five cells per second compared with the one cell per minute of previous methods, said Chang Lu, senior and corresponding author of the study currently online in the journal Analytic Chemistry. This rapid cell inspection permits testing of enough cells for diagnosis and determination of the disease's level, he said.

"If you look at the properties of only a few cells, it would be a stretch to say they exactly represent a tissue cell population since tissues have tens of thousands of cells," Lu said. "Our goal is to have a tool so that we can reputably look at large numbers of cells and obtain information about their biomechanical properties."

Using breast cancer cells, Lu and his research team investigated cancer cells at different stages and compared their size to normal cells after all three types of cells were treated with the electrical process.

The research technique uses an electrical field within a microscopic fluid-filled channel through which a cell moves. As the cell is exposed to the electricity, it swells.

The cell expansion results because as cancer develops, it compromises the cell's structure, or cytoskeleton. A metastatic cancer cell cytoskeleton is more prone to deformity than a primary cancer cell or a normal cell, said Lu, an assistant professor of agricultural and biological engineering. When cells were put through the electrical field that Lu and his colleagues used, pores opened in the cell m
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Contact: Susan Steeves
ssteeves@purdue.edu
765-496-7481
Purdue University
Source:Eurekalert  

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