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Our normal genetics may influence cancer growth, too
Date:11/10/2010

COLUMBUS, Ohio The genes we possess not only determine the color of our eyes and hair and how our bodies grow, they might also influence the changes that occur in tumors when we develop cancer.

A study by researchers at the Ohio State University Comprehensive Cancer Center-Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC James) suggests that our normal genetic background the genetic variations that we inherit contributes to the kinds of DNA changes that occur in tumor cells as cancer develops.

The researchers compared multiple independent tumors from people with a form of skin cancer called squamous cell carcinoma (SCC) for losses and gains of DNA in tumor cells. They found that the pattern of these changes is quite similar in tumors from the same person but quite different in tumors from different individuals.

The findings, published in a recent issue of PLoS Genetics, may offer a new way to identify individuals at greater risk for developing cancer, the researchers say.

"Our data strongly support the idea that an individual's normal genetic constitution can strongly influence the genetic changes that occur when a person develops cancer," says study leader Amanda Toland, assistant professor of medicine and a specialist in the genetics of cancer susceptibility at the OSUCCC James.

"They may also provide another strategy to identify genetic variations within healthy individuals that may increase their odds of developing cancer," she adds.

Toland and her collaborators analyzed 222 SCC tumors from 135 organ transplant recipients, who as a group are 65 to 250 times more likely to develop SCC than people in the general population. The researchers examined three or more separate tumors from 25 of these individuals.

They compared the genetic profiles of tumors from the same individual with those from other individuals for DNA copy number changes.

They found that the changes in SCCs
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Contact: Darrell E. Ward
Darrell.Ward@osumc.edu
614-293-3737
Ohio State University Medical Center
Source:Eurekalert

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