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Researcher targets gene regulators on link between arsenic, cancer
Date:7/14/2010

EAST LANSING, Mich. To determine how arsenic increases the risk of lung cancer and to identify potential treatments, a Michigan State University researcher will use $1.7 million in federal funding during the next five years to examine why certain genes disrupt cells, leading to the disease.

Chengfeng Yang, a physiology assistant professor with the College of Veterinary Medicine and MSU's Center for Integrative Toxicology, will be studying the role of very small ribonucleic acids called microRNAs. These microRNAs regulate genes, which control how a cell behaves.

The research project, which will study those processes in cultured human cells and mice, is funded by the National Institutes of Health.

"Arsenic is one of the most common environmental pollutants, and long-term arsenic exposure through drinking water is associated with increased risk of lung cancers specifically and some other cancers as well," Yang said. "The long-term goal of this study is to determine the mechanism by which this happens and to identify targets for the treatment and prevention of cancers resulting from arsenic exposure."

Since the levels of microRNAs are different when comparing normal tissue cells to cancer cells, Yang and his team are trying to determine if that difference is because of the tumor or if it is what caused the tumor in the first place.

"Does microRNA play a role in tumor development? Can carcinogens such as arsenic cause the deregulation of microRNA that leads to cancer development? That's what we need to find out," Yang said.

To accomplish that, Yang will look at two specific microRNAs miRNA200b and miRNA200c and the role they play in converting normal human bronchial epithelial cells to tumor cells when exposed to arsenic. Those specific microRNAs were chosen because during screening, they were the only two that were different when comparing normal cells with cells transformed by cells.

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Contact: Jason Cody
codyja@msu.edu
517-432-0924
Michigan State University
Source:Eurekalert  

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