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Air pollution exposure affects chances of developing premenopausal breast cancer
Date:4/20/2011

70 women with recently diagnosed breast cancer and 2,116 healthy women who lived in New York's Erie and Niagara counties between 1996 and 2001. This research involved only cancer cases.

Participants provided information on where they were born, where they lived at the time of their first menstrual period, and, if they had children, where they lived when they bore their first child. Data from air monitors operating in the relevant time periods was used to determine the amount of particulate matter at each participant's residence at those time periods. Air pollution data from 87 sites in Western New York was matched with residence location at year of birth, year of menarche and year of first child birth.

"We found that decreased E-cadherin promoter methylation was associated with higher exposure at birth, and increased p16 methylation with higher exposure at the time of a first child birth," says Dobson.

"For breast cancer cases, menopausal status appeared to modify the association between air pollution exposure and E-cadherin promoter methylation, with premenopausal women more susceptible to these early exposures than postmenopausal women."

More research is needed to determine the role of air pollution in DNA methylation in breast cancer development and progression, and to address changing air pollution contents and levels over time, Dobson notes.


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Contact: Lois Baker
ljbaker@buffalo.edu
716-645-4606
University at Buffalo
Source:Eurekalert

Page: 1 2

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