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Faulty DNA repair could be a risk factor for lung cancer in nonsmokers
Date:6/26/2008

air capacity as a risk factor for lung cancer in nonsmokers. Researchers drew white blood cells from 219 lung cancer patients and 309 matched control participants, all of whom had never smoked. They used the cells to conduct a host-cell reactivation assay, a complicated test that introduced a specific carcinogen, benzo[a]pyrene diol epoxide (BPDE) into the cells. BPDE is a hydrocarbon found in smoke of all kinds (tobacco, wood, etc.) that is highly carcinogenic and mutagenic, capable of changing the composition of DNA.

The study is a continuation of research underway at M. D. Anderson that is looking for genetic and epigenetic components to lung cancer risk. The research group has previously shown that DNA repair capacity as measured by the host cell reactivation assay was significantly lower in lung cancer patients who were current or former smokers than in matched controls.

"Many people think they aren't at risk for lung cancer because they don't smoke, but anyone who has non-smoking relatives with lung cancer should avoid not just tobacco smoke, but all the other carcinogens and mutagens that are products of combustion," Gorlova said.


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Contact: Jeremy Moore
Jeremy.moore@aacr.org
267-646-0557
American Association for Cancer Research
Source:Eurekalert

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